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					R407C              UNICO.A.STD/ELN “G”
        Air cooled liquid chillers with Scroll compressors and axial fans




                                               SCROLL compressors
                                                      20 ÷ 115 kW




                                           RC GROUP
                                  TECHNICAL DOCUMENTATION
                                  UNCSRL_AG_GB407_0203
R407C                                                                                          UNICO.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Scroll compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                         WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                     -2-
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                                   Air cooled liquid chillers with Scroll compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Stainless steel AISI 316 welded plate evaporator, with one gas circuit for each compressor,
                          insulated with closed cells polyurethane.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • SCROLL type hermetic compressor with built-in integral electric protection, built-in silencer on gas
                          discharge and crankcase electric heater.
                        • Stop valves on compressor suction and discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • Differential pressure switch on evaporator water side with protective function.
                        • Phases monitoring relay.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                     -3-
R407C                                                                                          UNICO.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Scroll compressors and axial fans

                        UNICO.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater, unit size G0 excluded.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.




                         WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                    -4-
R407C                                                                                               UNICO.A.STD/ELN “G”
                                                                      Air cooled liquid chillers with Scroll compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                     21.Z.1          25.Z.1          32.Z.1           37.Z.1           50.Z.1          61.Z.1
SIZE                                        G0              G0              G2               G2               G2              G4
COOLING CAPACITY (1)    kW                 20,3            23,2            32,5             36,7             49,3            56,5
COMPRESSORS (1)         n.                   1               1               1                1                1               1
Power input             kW                  7,2             8,5             10              12,4             16,9            23,1
Absorbed current        A                  13,5            15,8            17,7             22,4             29,1            38,3
Max absorbed current    A                   17              20              24               29               38              46
Starting current        A                  130             130             135              175              215             270
FANS                    n.                   1               1               2                2                2               2
Air flow                m3/h               9000           10500           18000            16500            20000           18000
Power input             kW                 0,78            0,78            1,56             1,56             1,56            1,56
Max absorbed current    A                   3,5             3,5             3,5              3,5              3,5             3,5
EVAPORATOR (1)          n.                   1               1               1                1                1               1
Water flow              m3/h                3,5              4              5,6              6,3              8,5             9,7
Pressure drops          kPa                27,8            36,2            31,4             16,5             19,6            18,1
Water content           l                    2               2               2                4                4               5
Max water flow          m3/h                7,2             7,2            10,7              15               19              23
GAS CIRCUITS            n.                   1               1               1                1                1               1
CAPACITY STEPS          n.                   1               1               1                1                1               1
DESUPERHEATER (2)
Heating capacity        kW                  6,3             7,2            10,1             11,4             15,4            17,6
Water flow              m3/h                1,1             1,3             1,8               2               2,7             3,1
Pressure drops          kPa                 4,7             6,1             12               5,5              9,9             13
Water content           l
Max water flow          m3/h                 3               3               3                8               8                8
100% HEAT RECLAIM (2)
Heating capacity        kW                 27,9            32,1            42,2             49,1             66,6            81,9
Water flow              m3/h                4,9             5,6             7,4              8,6             11,6            14,3
Pressure drops          kPa                31,4            41,6            48,8             22,7              24             25,7
Water content           l
Max water flow          m3/h                20              20              20               16               16              28
PUMPING GROUP
1 pump group              PU                1/1             1/1             1/1              1/1             2/1              2/1
1 pump group              PU-LN              --              --              --               --              --               --
2 pumps group             PU                 --              --              --               --              --               --
2 pumps group             PU-LN              --              --              --               --              --               --
DIMENSIONS
Lenght                  mm                 1150            1150            2000             2000            2000             2600
Width                   mm                 895             895             1040             1040            1040             1200
Height                  mm                 1640            1640            1690             1690            1690             1690
NET WEIGHT              kg                 330             330             480              540             590               750
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                2,82            2,73            3,25             2,96             2,92            2,45
Standard capacity steps IPLV               4,14            4,01            4,78             4,35             4,29            3,60
Standard capacity steps EMPE               3,19            3,08            3,67             3,34             3,30            2,76




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        -5-
R407C                                                                                                  UNICO.A.STD/ELN “G”
                                                                          Air cooled liquid chillers with Scroll compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                     36.Z.2     42.Z.2      50.Z.2          64.Z.2      74.Z.2      87.Z.2     100.Z.2     124.Z.2
SIZE                                        G2         G2          G2              G4          G4          G6          G6          G6
COOLING CAPACITY (1)    kW                 34,6       40,3        45,5            60,4         69         87,5        97,9       114,9
COMPRESSORS (1)         n.                   2          2           2               2           2           2           2           2
Power input             kW                 11,3       14,4        17,1            21,5        25,3        27,9        33,6         44
Absorbed current        A                  21,3       26,9        31,8            37,6        45,6        49,7        57,8        73,6
Max absorbed current    A                   28         34          39              48          58          67          76          92
Starting current        A                  111        145         148             157         201         241         249         311
FANS                    n.                   2          2           2               3           3           4           4           4
Air flow                m3/h              18000      18000       16500           27000       27000       41000       41000       41000
Power input             kW                 1,56       1,56        1,56            2,34        2,34         4,4         4,4         4,4
Max absorbed current    A                   3,5        3,5         3,5             3,5         3,5          8           8           8
EVAPORATOR (1)          n.                   1          1           1               1           1           1           1           1
Water flow              m3/h                5,9        6,9         7,8            10,4        11,8         15         16,8        19,7
Pressure drops          kPa                 38        36,3        46,2            51,5        47,7        22,8        28,5        32,5
Water content           l                    2          3           3               4           4          10          10          12
Max water flow          m3/h               10,3        12          12             14,4        15,8        31,3        31,3        34,4
GAS CIRCUITS            n.                   2          2           2               2           2           2           2           2
CAPACITY STEPS          n.                   2          2           2               2           2           2           2           2
DESUPERHEATER (2)
Heating capacity        kW                 10,8       12,6          14,2          18,9        21,5        27,3        30,5        35,8
Water flow              m3/h                1,9        2,2           2,5           3,3         3,8         4,8         5,3         6,2
Pressure drops          kPa                 4,5        4,6           5,9           3,7         4,9         7,8         9,8        13,4
Water content           l
Max water flow          m3/h                6           6            6             16          16          16          16          16
100% HEAT RECLAIM (2)
Heating capacity        kW                  46        55,4          63,5          82,6        95,1       115,3       131,8        161,6
Water flow              m3/h                8          9,6          11,1          14,4        16,6       20,1          23         28,1
Pressure drops          kPa                21,3       30,9          40,6          46,6        12,3        18          23,6         25
Water content           l
Max water flow          m3/h                40         40           40             40          32          32          32          56
PUMPING GROUP
1 pump group              PU               1/1         2/1          2/1           2/1         2/1          2/1         2/1         3/1
1 pump group              PU-LN             --          --           --            --          --           --          --          --
2 pumps group             PU               1/2         2/2          2/2           2/2         2/2          2/2         2/2         3/2
2 pumps group             PU-LN             --          --           --            --          --           --          --          --
DIMENSIONS
Lenght                  mm                2000        2000          2000         2600        2600         3600        3600        3600
Width                   mm                1040        1040          1040         1200        1200         1290        1290        1290
Height                  mm                1690        1690          1690         1690        1690         1690        1690        1690
NET WEIGHT              kg                570         590           610          820         860          1180        1240        1240
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,06       2,80          2,66          2,81        2,73        3,14        2,91        2,61
Standard capacity steps IPLV               4,50       4,11          3,91          4,13        4,01        4,61        4,28        3,84
Standard capacity steps EMPE               3,46       3,16          3,01          3,17        3,08        3,54        3,29        2,95




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        -6-
R407C                                                                                                 UNICO.A.STD/ELN “G”
                                                                        Air cooled liquid chillers with Scroll compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    21.Z.1         25.Z.1               32.Z.1          37.Z.1            50.Z.1          61.Z.1
Sound pressure level
1m far                   dB(A)             68               68                68               70                70             70
5m far                   dB(A)             54               54               54,8             56,8              56,8           56,8
10m far                  dB(A)             48               48               48,8             50,8              50,8           50,8

MODEL                                    36.Z.2     42.Z.2          50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Sound pressure level
1m far                   dB(A)             70         70             70          70          71          71              71       72
5m far                   dB(A)            56,8       56,8           56,8        57,5        58,5        60,5            60,5     61,5
10m far                  dB(A)            50,8       50,8           50,8        51,6        52,6        54,6            54,6     55,6



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                    21.Z.1         25.Z.1               32.Z.1          37.Z.1            50.Z.1          61.Z.1
Mean sound pressure level
1m far                    dB(A)            62               62                62               64               64              64

MODEL                                    36.Z.2     42.Z.2          50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Mean sound pressure level
1m far                    dB(A)            64         64             64            64        65          65             65        66




                         UNICO.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    21.Z.1         25.Z.1               32.Z.1          37.Z.1            50.Z.1          61.Z.1
Sound pressure level
1m far                   dB(A)            61,8              61,8             61,8             63,8              63,8           63,8
5m far                   dB(A)            47,8              47,8             48,6             50,6              50,6           50,6
10m far                  dB(A)            41,8              41,8             42,6             44,6              44,6           44,6

MODEL                                    36.Z.2     42.Z.2          50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Sound pressure level
1m far                   dB(A)            63,8       63,8           63,8        63,8        64,8        64,8            64,8     65,8
5m far                   dB(A)            50,6       50,6           50,6        51,3        52,3        54,3            54,3     55,3
10m far                  dB(A)            44,6       44,6           44,6        45,4        46,4        48,4            48,4     49,4



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                    21.Z.1         25.Z.1               32.Z.1          37.Z.1            50.Z.1          61.Z.1
Mean sound pressure level
1m far                    dB(A)           55,8              55,8             55,8             57,8              57,8           57,8

MODEL                                    36.Z.2     42.Z.2          50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Mean sound pressure level
1m far                    dB(A)           57,8       57,8           57,8        57,8        58,8        58,8            58,8     59,8




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.

RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        -7-
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                                   Air cooled liquid chillers with Scroll compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Stainless steel AISI 316 welded plate evaporator, with one gas circuit for each compressor,
                          insulated with closed cells polyurethane.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • SCROLL type hermetic compressor with built-in integral electric protection, built-in silencer on gas
                          discharge and crankcase electric heater.
                        • Stop valves on compressor suction and discharge.
                        • Rubber holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • Differential pressure switch on evaporator water side with protective function.
                        • Phases monitoring relay.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                             44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                     -8-
R407C                                                                                         UNICO.A.STD/ELN “G”
                                                                 Air cooled liquid chillers with Scroll compressors and axial fans

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater, unit size G0 excluded.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.




                         WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                    -9-
R407C                                                                                              UNICO.A.STD/ELN “G”
                                                                      Air cooled liquid chillers with Scroll compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.ELN: Chiller in extremely low noise version.

MODEL                                     21.Z.1          25.Z.1          32.Z.1          37.Z.1           50.Z.1           61.Z.1
SIZE                                        G2              G2              G2              G4               G4               G4
COOLING CAPACITY (1)    kW                 19,1             22             29,2            34,7             45,8             55,4
COMPRESSORS (1)         n.                   1               1               1               1                1                1
Power input             kW                   8              9,2            11,8            13,4             18,8             23,7
Absorbed current        A                  14,4            16,7            20,2            23,8             31,6             38,8
Max absorbed current    A                   17              20              24              29               38               46
Starting current        A                  130             130             135             175              215              270
FANS                    n.                   1               1               2               2                3                3
Air flow                m3/h               5500            6500            9000           11000            14000            15000
Power input             kW                 0,78            0,78            1,56            1,56             2,34             2,34
Max absorbed current    A                   3,5             3,5             3,5             3,5              3,5              3,5
EVAPORATOR (1)          n.                   1               1               1               1                1                1
Water flow              m3/h                3,3             3,8              5               6               7,9              9,5
Pressure drops          kPa                24,4            32,5            25,3            14,8             16,9             17,4
Water content           l                    2               2               2               4                4                5
Max water flow          m3/h                7,2             7,2            10,7             15               19               23
GAS CIRCUITS            n.                   1               1               1               1                1                1
CAPACITY STEPS          n.                   1               1               1               1                1                1
DESUPERHEATER (2)
Heating capacity        kW                  6              6,9              9,1            10,8             14,3             17,3
Water flow              m3/h                1              1,2              1,6             1,9              2,5              3
Pressure drops          kPa                4,2             5,5              9,7             4,9              8,6             12,5
Water content           l
Max water flow          m3/h                3               3               3                8                8                8
100% HEAT RECLAIM (2)
Heating capacity        kW                 27,9            32,1            42,2            49,1             66,6             81,9
Water flow              m3/h                4,9             5,6             7,4             8,6             11,6             14,3
Pressure drops          kPa                31,4            41,6            48,8            22,7              24              25,7
Water content           l
Max water flow          m3/h                20              20              20              16               16               28
PUMPING GROUP
1 pump group              PU               1/1             1/1              1/1             1/1              2/1              2/1
1 pump group              PU-LN             --              --               --              --               --               --
2 pumps group             PU                --              --               --              --               --               --
2 pumps group             PU-LN             --              --               --              --               --               --
DIMENSIONS
Lenght                  mm                2000            2000             2000            2600             2600             2600
Width                   mm                1040            1040             1040            1200             1200             1200
Height                  mm                1690            1690             1690            1690             1690             1690
NET WEIGHT              kg                460             460              500             680              770              790
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                2,39            2,39            2,47            2,59             2,44             2,34
Standard capacity steps IPLV               3,51            3,52            3,64            3,81             3,58             3,44
Standard capacity steps EMPE               2,70            2,70            2,80            2,93             2,75             2,64




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                       - 10 -
R407C                                                                                                     UNICO.A.STD/ELN “G”
                                                                             Air cooled liquid chillers with Scroll compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.ELN: Chiller in extremely low noise version.

MODEL                                    36.Z.2      42.Z.2      50.Z.2            64.Z.2      74.Z.2      87.Z.2      100.Z.2     124.Z.2
SIZE                                       G4          G4          G4                G4          G6          G7           G7          G7
COOLING CAPACITY (1)    kW                32,6        38,2        44,4              54,9        63,3        80,8         88,8       110,1
COMPRESSORS (1)         n.                 2            2           2                 2           2           2            2           2
Power input             kW                12,3        15,6        17,8              24,6        28,6        31,8         38,4        46,6
Absorbed current        A                 22,6        28,5        32,6              41,7        50,1        54,8         64,2        76,8
Max absorbed current    A                  28          34          39                48          58          67           76          92
Starting current        A                 111         145         148               157         201         241          249         311
FANS                    n.                 2            3           3                 3           4           4            4           4
Air flow                m3/h             11000       12000       15000             15000       17500       26000        26000       31000
Power input             kW                1,56        2,34        2,34              2,34        3,12        3,12         3,12        4,4
Max absorbed current    A                 3,5         3,5         3,5                3,5          7           7            7           8
EVAPORATOR (1)          n.                 1            1           1                 1           1           1            1           1
Water flow              m3/h              5,6          6,6         7,6               9,4        10,9        13,9         15,2        18,9
Pressure drops          kPa               33,9        32,6        44,1              42,5        40,1        19,4         23,4        29,9
Water content           l                  2            3           3                 4           4          10           10          12
Max water flow          m3/h              10,3         12          12               14,4        15,8        31,3         31,3        34,4
GAS CIRCUITS            n.                 2            2           2                 2           2           2            2           2
CAPACITY STEPS          n.                 2            2           2                 2           2           2            2           2
DESUPERHEATER (2)
Heating capacity        kW                10,2        11,9         13,9             17,1        19,7        25,2        27,7        34,4
Water flow              m3/h              1,8         2,1          2,4                3         3,4         4,4         4,8          6
Pressure drops          kPa                4          4,2           5,6              3,1         4,1         6,7         8,1        12,3
Water content           l
Max water flow          m3/h               6           6               6             16          16          16          16          16
100% HEAT RECLAIM (2)
Heating capacity        kW                 46         55,4         63,5             82,6        95,1        115,3       131,8       161,6
Water flow              m3/h               8           9,6         11,1             14,4        16,6        20,1          23        28,1
Pressure drops          kPa               21,3        30,9         40,6             46,6        12,3         18          23,6        25
Water content           l
Max water flow          m3/h               40          40              40            40          32          32          32          56
PUMPING GROUP
1 pump group              PU              1/1         2/1              2/1           2/1         2/1         2/1         2/1         3/1
1 pump group              PU-LN            --          --               --            --          --          --          --          --
2 pumps group             PU              1/2         2/2              2/2           2/2         2/2         2/2         2/2         3/2
2 pumps group             PU-LN            --          --               --            --          --          --          --          --
DIMENSIONS
Lenght                  mm                2600       2600         2600              2600        3600        3600        3600        3600
Width                   mm                1200       1200         1200              1200        1290        1290        1290        1290
Height                  mm                1690       1690         1690              1690        1690        2215        2215        2215
NET WEIGHT              kg                720        750          750               820         1120        1230        1290        1340
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER               2,65        2,45         2,49             2,23        2,21        2,54        2,31        2,36
Standard capacity steps IPLV              3,90        3,60         3,67             3,28        3,25        3,74        3,40        3,47
Standard capacity steps EMPE              2,99        2,77         2,82             2,52        2,50        2,87        2,61        2,67




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        - 11 -
R407C                                                                                                    UNICO.A.STD/ELN “G”
                                                                          Air cooled liquid chillers with Scroll compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                     21.Z.1         25.Z.1                 32.Z.1          37.Z.1            50.Z.1          61.Z.1
Sound pressure level
1m far                   dB(A)              56              59                   57               59                60             61
5m far                   dB(A)              42              45                  43,8             45,8              47,5           48,5
10m far                  dB(A)              36              39                  37,8             39,8              41,6           42,6

MODEL                                     36.Z.2     42.Z.2            50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Sound pressure level
1m far                   dB(A)              59        57                61          61          59          62              62       63
5m far                   dB(A)             45,8      44,5              48,5        48,5        48,5        51,5            51,5     52,5
10m far                  dB(A)             39,8      38,6              42,6        42,6        42,6        45,6            45,6     46,6



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                     21.Z.1         25.Z.1                 32.Z.1          37.Z.1            50.Z.1          61.Z.1
Mean sound pressure level
1m far                    dB(A)             50              53                   51               53               54              55

MODEL                                     36.Z.2     42.Z.2            50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Mean sound pressure level
1m far                    dB(A)             53        51                55            55        53          56             56       57




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        - 12 -
R407C                                                                                              UNICO.A.STD/ELN “G”
                                                                      Air cooled liquid chillers with Scroll compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.A.STD. 21.Z.1 unit with PU 1/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 17,0 +
                        - Condenser fans (*)        A  3,5 +
                        - Water pump (*)            A  1,7 =
                        Maximum electric absorption A 22,2


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                         IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                    - 13 -
R407C                                                                                                          UNICO.A.STD/ELN “G”
                                                                                 Air cooled liquid chillers with Scroll compressors and axial fans

                               OPTIONAL

                               CHILLED WATER TANKS
                               Available for all air cooled liquid chillers, size G0 excluded.
                               This optional is made by 2 insulated water tanks, closed in a galvanized steel sheet box and painted.
                               The tank is supplied assembled under the unit, ready to work and with antifreeze electric heater.



CHILLER SIZE                                                          G2                          G4                         G6 - G7
Capacity                                 l                            250                         360                          530
Water inlet                              Ø                          2" MPT                    2 1/2" MPT                     3" MPT
Water discharge                          Ø MPT                        1/2"                        1/2"                         1/2"
Air discharge                            Ø MPT                        1/2"                        1/2"                         1/2"
Empty weight                             kg                           200                         280                          390
Dimensions
                               A         mm                         1.040                        1.200                        1.290
                               B         mm                         1.120                        1.290                        1.380
                               C         mm                         1.210                        1.400                        1.520
                               D         mm                          80                           200                          200
                               E         mm                         2.000                        2.600                        3.600
                               F         mm                          170                          100                          100
                               G         mm                           --                           --                         1.600
Fixing holes                   5         N° x Ø mm                  4x16                         4x20                         6x20



CHILLED WATER TANKS


                                                                      G2 - G4
                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                                            D
                                                                         5                                 5
                       A
                                                                F
                   B
                   C                                                                     E


                                                                      G6 - G7
                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                  G                                G                  D
                       A
                                                                F           5                              5                            5
                   B
                   C                                                                                   E



                               1.   Water inlet.
                               2.   Water outlet. For exact position see the drawing of the chiller.
                               3.   Pipe for air discharge.
                               4.   Pipe for water drain.
                               5.   Fixing holes.



RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                                  - 14 -
R407C                                                                                                UNICO.A.STD/ELN “G”
                                                                        Air cooled liquid chillers with Scroll compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                               HEAT RECLAIM HYDRAULIC CIRCUIT




                                         BGV                                      YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                          COM
                                                           B




                              SUCTION LINE                                TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                         - 15 -
R407C                                                                                                 UNICO.A.STD/ELN “G”
                                                                         Air cooled liquid chillers with Scroll compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                               B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                      - 16 -
R407C                                                                                                  UNICO.A.STD/ELN “G”
                                                                          Air cooled liquid chillers with Scroll compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.

1 pump version                               PU1/1                               PU2/1                                  PU3/1
2 pumps version                              PU1/2                               PU2/2                                  PU3/2
Min. water flow             m3/h               3                                   7                                     15
Max water flow              m3/h               8                                  17                                     30
Total pressure
With min. water flow        kPa               205                                 235                                   225
With max. water flow        kPa               160                                 180                                   175
Installed power (1)         kW                0,55                                1,5                                   2,2
Plate current (1)           A                  1,7                                2,9                                   5,3
Net weight ../1             kg                 50                                  70                                    74
Net weight ../2             kg                 85                                 110                                   112
Sound pressure level (2)    dB(A)              69                                  70                                    70
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME


                                      PU.../1                                                   PU.../2
                       VE                                                        VE
                MA            YS                            MA            MA             YS                              MA




                                                     FL                                                       FL
                                        P                                                         P
                                                                                          RU             YR        RU



                                                                                                              FL
                                                                                                  P
                            MA Manometer                                                  RU             YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch



RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                           - 17 -
R407C                                                                                            UNICO.A.STD/ELN “G”
                                                                    Air cooled liquid chillers with Scroll compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.A.STD.21.Z.1 = 68 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 68-3 = 65 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                         750




                        Chiller size                    G0          G2         G4          G6          G7
                        Weight                 kg       50          80         110         150         150




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                     - 18 -
R407C                                                                                               UNICO.A.STD/ELN “G”
                                                                       Air cooled liquid chillers with Scroll compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                  R...                              G...
                                           Light                                Medium                             Heavy
AxB                     mm                 Ø124                                 114x174                           208x208
C                       mm                  90                                    90                                122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                           C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRL_AG_GB407_0203                        - 19 -
R407C                    UNICO.C.STD/ELN “G”
        Air cooled liquid chillers with Scroll compressors and centrifugal fans




                                                     SCROLL compressors
                                                            20 ÷ 112 kW




                                                 RC GROUP
                                        TECHNICAL DOCUMENTATION
                                        UNCSRL_CG_GB407_0203
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -30°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                         WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     -2-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.C.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Stainless steel AISI 316 welded plate evaporator, with one gas circuit for each compressor,
                          insulated with closed cells polyurethane.
                        • Double suction centrifugal fans with forward-curved blades, fitted with rubber gasket for fan outlet
                          sealing to the unit structure and equipped with rubber antivibration holders. Each fan is equipped
                          with its own belt driven system with 3 phase 4 poles electric motor, adjustable drive pulley and
                          adjustable fan motor base for belt tightening.
                        • Air exhaustion on condenser coil side.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • SCROLL type hermetic compressor with built-in integral electric protection, built-in silencer on gas
                          discharge and crankcase electric heater.
                        • Stop valves on compressor suction and discharge.
                        • Rubber holders for compressor.
                        • ON/OFF condensing control system acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from +5°C to +42/44°C.
                          - Partial load (if scheduled) with outdoor temperature up to +46/50°C.
                            Over this limit a safety device stops the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • Differential pressure switch on evaporator water side with protective function.
                        • Phases monitoring relay.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




                         WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     -3-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        UNICO.C.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system with air flow variation through special air damper, installed on the
                            fan outlet, and proportional motor directly driven by the proportional signal managed by MP99
                            microprocessor control:
                            ◊ Full load with outdoor temperature from -30°C to 32/36°C.
                            ◊ Full load with fans at max air flow and noise pressure increased up to the STD units with
                               outdoor temperature up to +42/44°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +46/50°C. Over this limit a safety
                               device stops the unit.
                        • Noise absorption plenum on fans air discharge, height 750mm for version with air discharge from
                          the top.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Kit for outdoor installation with evaporator antifreeze electric heater.
                        • Air exhaustion from the top (vertical air flow).
                        • Overpressure dampers on fans mouth.
                        • Condensing control system with air flow variation through special air damper, installed on the fan
                          outlet, and proportional motor directly driven by the proportional signal managed by MP99
                          microprocessor control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater, unit size G1 excluded.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.




                         WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     -4-
R407C                                                                                                UNICO.C.STD/ELN “G”
                                                                  Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        TECHNICAL DATA

                        UNICO.C.STD: Chiller in standard version.

MODEL                                    21.Z.1           25.Z.1            32.Z.1          37.Z.1           50.Z.1           61.Z.1
SIZE                                       G1               G1                G1              G3               G3               G3
COOLING CAPACITY (1)      kW              19,2             21,8              28,7            35,2             46,9             56,8
COMPRESSORS (1)           n.                1                1                 1              1                1                1
Power input               kW               7,9              9,3               12             13,1             18,2              23
Absorbed current          A               14,4             16,8              20,5            23,5             30,7             38,2
Max absorbed current      A                17               20                24              29               38               46
Starting current          A               130              130               135             175              215              270
FANS                      n.                1                1                 1              2                2                2
Air flow                  m3/h            6500             7500              9000           13000            18000            18000
Available static pressure Pa               50               50                50              50               50               50
Power input               kW              0,75              1,1               1,5            1,5               3                3
Max absorbed current      A                2,2              2,9               3,7            4,3              7,4              7,4
EVAPORATOR (1)            n.                1                1                 1              1                1                1
Water flow                m3/h             3,3              3,7               4,9             6               8,1              9,8
Pressure drops            kPa             24,6             31,8              24,6            15,2             17,7             18,3
Water content             l                 2                2                 2              4                4                5
Max water flow            m3/h             7,2              7,2              10,7             15               19               23
GAS CIRCUITS              n.                1                1                 1              1                1                1
CAPACITY STEPS            n.                1                1                 1              1                1                1
DESUPERHEATER (2)
Heating capacity          kW                6              6,8                9               11              14,6             17,7
Water flow                m3/h              1              1,2               1,6              1,9             2,6               3,1
Pressure drops            kPa              4,2             5,4               9,4              5,1              9               13,1
Water content             l
Max water flow            m3/h              3               3                 3                8                8               8
100% HEAT RECLAIM (2)
Heating capacity          kW              27,9             32,1              42,2            49,1             66,6             81,9
Water flow                m3/h             4,9              5,6               7,4             8,6             11,6             14,3
Pressure drops            kPa             31,4             41,6              48,8            22,7              24              25,7
Water content             l
Max water flow            m3/h             20               20                20              16               16               28
PUMPING GROUP
1 pump group                PU             1/1             1/1               1/1              1/1              2/1             2/1
1 pump group                PU-LN           --              --                --               --               --              --
2 pumps group               PU              --              --                --               --               --              --
2 pumps group               PU-LN           --              --                --               --               --              --
DIMENSIONS
Lenght                    mm              1150            1150              1150             2000             2000            2000
Width                     mm              895             895               895              1040             1040            1040
Height                    mm              1960            1960              1960             2010             2010            2010
NET WEIGHT                kg              390             390               435              670              740             760
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER             2,43             2,34              2,39            2,69             2,58             2,47
Standard capacity steps   IPLV            3,57             3,45              3,52            3,95             3,79             3,63
Standard capacity steps   EMPE            2,75             2,65              2,70            3,04             2,91             2,79




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                          -5-
R407C                                                                                              UNICO.C.STD/ELN “G”
                                                                Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        TECHNICAL DATA

                        UNICO.C.STD: Chiller in standard version.

MODEL                                     36.Z.2     42.Z.2      50.Z.2      64.Z.2      74.Z.2      87.Z.2     100.Z.2     124.Z.2
SIZE                                        G3         G3          G3          G3          G5          G7          G7          G7
COOLING CAPACITY (1)      kW               32,5        38         43,1        56,3         69         83,8        92,8        112
COMPRESSORS (1)           n.                 2          2           2           2           2           2           2           2
Power input               kW               12,4       15,8        18,6        23,8        25,3         30         36,2        45,7
Absorbed current          A                22,7       28,7        33,6        40,7        45,6        52,4        61,3        76,2
Max absorbed current      A                 28         34          39          48          58          67          76          92
Starting current          A                111        145         148         157         201         241         249         311
FANS                      n.                 2          2           2           2           3           4           4           4
Air flow                  m3/h            12000      13000       15000       18000       27000       36000       36000       36000
Available static pressure Pa                50         50          50          50          50          50          50          50
Power input               kW                1,5        1,5         2,2          3          4,5          6           6           6
Max absorbed current      A                 4,3        4,3         5,7         7,4         11         14,7        14,7        14,7
EVAPORATOR (1)            n.                 1          1           1           1           1           1           1           1
Water flow                m3/h              5,6        6,5         7,4         9,7        11,8        14,4        15,9        19,2
Pressure drops            kPa              33,7       32,2        41,6        44,7        47,7        20,9        25,6        30,9
Water content             l                  2          3           3           4           4          10          10          12
Max water flow            m3/h             10,3        12          12         14,4        15,8        31,3        31,3        34,4
GAS CIRCUITS              n.                 2          2           2           2           2           2           2           2
CAPACITY STEPS            n.                 2          2           2           2           2           2           2           2
DESUPERHEATER (2)
Heating capacity          kW               10,2       11,8          13,5      17,6        21,5        26,1         29          35
Water flow                m3/h              1,8        2,1           2,3       3,1         3,8         4,6          5          6,1
Pressure drops            kPa                4         4,1           5,3       3,2         4,9         7,2         8,8        12,8
Water content             l
Max water flow            m3/h              6           6            6         16          16          16          16          16
100% HEAT RECLAIM (2)
Heating capacity          kW                46        55,4          63,5      82,6        95,1       115,3       131,8        161,6
Water flow                m3/h              8          9,6          11,1      14,4        16,6       20,1          23         28,1
Pressure drops            kPa              21,3       30,9          40,6      46,6        12,3        18          23,6         25
Water content             l
Max water flow            m3/h              40         40           40         40          32          32          32          56
PUMPING GROUP
1 pump group                PU             1/1         2/1          2/1       2/1          2/1         2/1         2/1         3/1
1 pump group                PU-LN           --          --           --        --           --          --          --          --
2 pumps group               PU             1/2         2/2          2/2       2/2          2/2         2/2         2/2         3/2
2 pumps group               PU-LN           --          --           --        --           --          --          --          --
DIMENSIONS
Lenght                    mm              2000        2000          2000     2000         2600        3600        3600        3600
Width                     mm              1040        1040          1040     1040         1200        1290        1290        1290
Height                    mm              2010        2010          2010     2010         2240        2010        2010        2010
NET WEIGHT                kg              690         710           720      790          1060        1450        1510        1540
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER              2,62       2,41          2,32      2,37        2,73        2,79        2,56        2,45
Standard capacity steps   IPLV             3,85       3,54          3,41      3,48        4,01        4,11        3,77        3,60
Standard capacity steps   EMPE             2,96       2,72          2,62      2,67        3,08        3,16        2,90        2,77




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                        -6-
R407C                                                                                                UNICO.C.STD/ELN “G”
                                                                 Air cooled liquid chillers with Scroll compressors and centrifugal fans

                         ACOUSTIC DATA

                         UNICO.C.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.

MODEL                                    21.Z.1         25.Z.1              32.Z.1          37.Z.1            50.Z.1          61.Z.1
Sound pressure level
1m far                   dB(A)             65               65               72               66                74             74
5m far                   dB(A)             51               51               58              52,8              60,8           60,8
10m far                  dB(A)             45               45               52              46,8              54,8           54,8

MODEL                                    36.Z.2     42.Z.2         50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Sound pressure level
1m far                   dB(A)             65         66            70          74          76          75              75       75
5m far                   dB(A)            51,8       52,8          56,8        60,8        63,5        64,5            64,5     64,5
10m far                  dB(A)            45,8       46,8          50,8        54,8        57,6        58,6            58,6     58,6


                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.
MODEL                                    21.Z.1         25.Z.1              32.Z.1          37.Z.1            50.Z.1          61.Z.1
Mean sound pressure level
1m far                    dB(A)            59               59               66               60               68              68

MODEL                                    36.Z.2     42.Z.2         50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Mean sound pressure level
1m far                    dB(A)            59         60            64            68        70          69             69        69




                         UNICO.C.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.

MODEL                                    21.Z.1         25.Z.1              32.Z.1          37.Z.1            50.Z.1          61.Z.1
Sound pressure level
1m far                   dB(A)             60               60               67               61                69             69
5m far                   dB(A)             46               46               53              47,8              55,8           55,8
10m far                  dB(A)             40               40               47              41,8              49,8           49,8

MODEL                                    36.Z.2     42.Z.2         50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Sound pressure level
1m far                   dB(A)             60         61            65          69          71          70              70       70
5m far                   dB(A)            46,8       47,8          51,8        55,8        58,5        59,5            59,5     59,5
10m far                  dB(A)            40,8       41,8          45,8        49,8        52,6        53,6            53,6     53,6


                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.
MODEL                                    21.Z.1         25.Z.1              32.Z.1          37.Z.1            50.Z.1          61.Z.1
Mean sound pressure level
1m far                    dB(A)            54               54               61               55               63              63

MODEL                                    36.Z.2     42.Z.2         50.Z.2     64.Z.2      74.Z.2      87.Z.2        100.Z.2   124.Z.2
Mean sound pressure level
1m far                    dB(A)            54         55            59            63        65          64             64        64


                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.

RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                       -7-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.C.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Stainless steel AISI 316 welded plate evaporator, with one gas circuit for each compressor,
                          insulated with closed cells polyurethane.
                        • Double suction centrifugal fans with forward-curved blades, fitted with rubber gasket for fan outlet
                          sealing to the unit structure and equipped with rubber antivibration holders. Each fan is equipped
                          with its own belt driven system with 3 phase 4 poles electric motor, adjustable drive pulley and
                          adjustable fan motor base for belt tightening.
                        • Air exhaustion on condenser coil side.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • SCROLL type hermetic compressor with built-in integral electric protection, built-in silencer on gas
                          discharge and crankcase electric heater.
                        • Stop valves on compressor suction and discharge.
                        • Rubber holders for compressor.
                        • Condensing control system with air flow variation through special air damper, installed on the fan
                          outlet, and proportional motor directly driven by the proportional signal managed by MP99
                          microprocessor control, allowing the following operating conditions:
                          - Full load with outdoor temperature from -30°C to +42/44°C.
                          - Partial load (if scheduled) with outdoor temperature up to +46/50°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • Differential pressure switch on evaporator water side with protective function.
                        • Phases monitoring relay.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.



                         WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     -8-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        UNICO.C.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 750mm for version with air discharge from
                          the top.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Kit for outdoor installation with evaporator antifreeze electric heater.
                        • Air exhaustion from the top (vertical air flow).
                        • Overpressure dampers on fans mouth.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater, unit size G1 excluded.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.




                         WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     -9-
R407C                                                                                                 UNICO.C.STD/ELN “G”
                                                                  Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        TECHNICAL DATA

                        UNICO.C.ELN: Chiller in extremely low noise version.

MODEL                                     21.Z.1          25.Z.1            32.Z.1           37.Z.1          50.Z.1           61.Z.1
SIZE                                        G3              G3                G3               G5              G5               G5
COOLING CAPACITY (1)      kW               18,5            21,5              28,3             32,9             45              56,4
COMPRESSORS (1)           n.                 1               1                 1                1               1                1
Power input               kW                8,2             9,5              12,2             14,4            19,2             23,2
Absorbed current          A                14,7             17               20,8             25,2            32,1             38,3
Max absorbed current      A                 17              20                24               29              38               46
Starting current          A                130             130               135              175             215              270
FANS                      n.                 2               2                 2                2               3                3
Air flow                  m3/h             5000            6000              7500             9000           13000            16000
Available static pressure Pa                50              50                50               50              50               50
Power input               kW               0,74            0,74              0,74             0,74            1,11             1,11
Max absorbed current      A                 2,1             2,1               2,1              2,1            3,15             3,15
EVAPORATOR (1)            n.                 1               1                 1                1               1                1
Water flow                m3/h              3,2             3,7               4,9              5,6             7,7              9,7
Pressure drops            kPa              23,1             31               23,8             13,3            16,3              18
Water content             l                  2               2                 2                4               4                5
Max water flow            m3/h              7,2             7,2              10,7              15              19               23
GAS CIRCUITS              n.                 1               1                 1                1               1                1
CAPACITY STEPS            n.                 1               1                 1                1               1                1
DESUPERHEATER (2)
Heating capacity          kW               5,8             6,7                8,8             10,3             14              17,6
Water flow                m3/h              1              1,2                1,5              1,8             2,4              3,1
Pressure drops            kPa              3,9             5,3                9,1              4,4             8,3             12,9
Water content             l
Max water flow            m3/h              3               3                 3                8                8                8
100% HEAT RECLAIM (2)
Heating capacity          kW               27,9            32,1              42,2             49,1            66,6             81,9
Water flow                m3/h              4,9             5,6               7,4              8,6            11,6             14,3
Pressure drops            kPa              31,4            41,6              48,8             22,7             24              25,7
Water content             l
Max water flow            m3/h              20              20                20               16              16               28
PUMPING GROUP
1 pump group                PU             1/1             1/1                1/1             1/1              2/1              2/1
1 pump group                PU-LN           --              --                 --              --               --               --
2 pumps group               PU              --              --                 --              --               --               --
2 pumps group               PU-LN           --              --                 --              --               --               --
DIMENSIONS
Lenght                    mm              2000            2000               2000            2600             2600             2600
Width                     mm              1040            1040               1040            1200             1200             1200
Height                    mm              2010            2010               2010            2240             2240             2240
NET WEIGHT                kg              590             590                630             840              900              910
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER              2,26            2,26              2,32             2,28            2,34             2,43
Standard capacity steps   IPLV             3,32            3,33              3,41             3,36            3,45             3,57
Standard capacity steps   EMPE             2,55            2,56              2,62             2,58            2,65             2,75




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                       - 10 -
R407C                                                                                               UNICO.C.STD/ELN “G”
                                                                 Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        TECHNICAL DATA

                        UNICO.C.ELN: Chiller in extremely low noise version.

MODEL                                     36.Z.2     42.Z.2        50.Z.2     64.Z.2      74.Z.2      87.Z.2     100.Z.2      124.Z.2
SIZE                                        G5         G5            G5         G5          G7          G8          G8           G8
COOLING CAPACITY (1)      kW               30,6       36,3          42,9       55,9        63,2        82,7        91,6        109,3
COMPRESSORS (1)           n.                 2          2             2          2           2           2           2            2
Power input               kW               13,5       16,7          18,7        24         28,7        30,6        37,1          47
Absorbed current          A                 24        29,7          33,8        41         50,2        53,3        62,5         77,3
Max absorbed current      A                 28         34            39         48          58          67          76           92
Starting current          A                111        145           148        157         201         241         249          311
FANS                      n.                 2          2             3          3           4           4           4            6
Air flow                  m3/h             8500      10000         13000      16000       19000       29000       29000        30000
Available static pressure Pa                50         50            50         50          50          50          50           50
Power input               kW               0,74       0,74          1,11       1,11        1,48         2,2         2,2         2,22
Max absorbed current      A                 2,1        2,1          3,15       3,15         4,2         6,2         6,2          6,3
EVAPORATOR (1)            n.                 1          1             1          1           1           1           1            1
Water flow                m3/h              5,2        6,2           7,4        9,6        10,8        14,2        15,7         18,8
Pressure drops            kPa              29,7       29,4          41,1       44,1         40         20,3         25          29,4
Water content             l                  2          3             3          4           4          10          10           12
Max water flow            m3/h             10,3        12            12        14,4        15,8        31,3        31,3         34,4
GAS CIRCUITS              n.                 2          2             2          2           2           2           2            2
CAPACITY STEPS            n.                 2          2             2          2           2           2           2            2
DESUPERHEATER (2)
Heating capacity          kW               9,5        11,3             13,4    17,4        19,7        25,8        28,6        34,1
Water flow                m3/h             1,7          2               2,3      3          3,4         4,5          5          5,9
Pressure drops            kPa              3,5         3,8              5,2     3,2         4,1          7          8,6        12,1
Water content             l
Max water flow            m3/h              6           6               6       16          16          16          16          16
100% HEAT RECLAIM (2)
Heating capacity          kW                46        55,4             63,5    82,6        95,1       115,3        131,8       161,6
Water flow                m3/h              8          9,6             11,1    14,4        16,6       20,1           23        28,1
Pressure drops            kPa              21,3       30,9             40,6    46,6        12,3        18           23,6        25
Water content             l
Max water flow            m3/h              40         40              40       40          32          32          32          56
PUMPING GROUP
1 pump group                PU             1/1         2/1             2/1      2/1         2/1         2/1         2/1         3/1
1 pump group                PU-LN           --          --              --       --          --          --          --          --
2 pumps group               PU             1/2         2/2             2/2      2/2         2/2         2/2         2/2         3/2
2 pumps group               PU-LN           --          --              --       --          --          --          --          --
DIMENSIONS
Lenght                    mm              2600        2600         2600        2600        3600        5170        5170        5170
Width                     mm              1200        1200         1200        1200        1290        1290        1290        1290
Height                    mm              2240        2240         2240        2240        2010        2050        2050        2050
NET WEIGHT                kg              860         880          920         970         1360        1850        1910        1970
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER              2,27       2,17             2,29    2,33        2,20        2,70        2,47        2,33
Standard capacity steps   IPLV             3,33       3,20             3,37    3,42        3,24        3,97        3,63        3,42
Standard capacity steps   EMPE             2,56       2,46             2,59    2,63        2,49        3,05        2,79        2,63




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                        - 11 -
R407C                                                                                                   UNICO.C.STD/ELN “G”
                                                                   Air cooled liquid chillers with Scroll compressors and centrifugal fans

                         ACOUSTIC DATA

                         UNICO.C.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.
MODEL                                    21.Z.1         25.Z.1                  32.Z.1        37.Z.1            50.Z.1             61.Z.1
Sound pressure level
1m far                   dB(A)             53                55                  57             59                 60               64
5m far                   dB(A)            39,8              41,8                43,8           45,8               47,5             51,5
10m far                  dB(A)            33,8              35,8                37,8           39,8               41,6             45,6

MODEL                                    36.Z.2     42.Z.2          50.Z.2        64.Z.2    74.Z.2       87.Z.2      100.Z.2       124.Z.2
Sound pressure level
1m far                   dB(A)             58         61                60          64        61          62              62          62
5m far                   dB(A)            44,8       47,8              47,5        51,5      50,5        51,5            51,5        51,5
10m far                  dB(A)            38,8       41,8              41,6        45,6      44,6        45,6            45,6        45,6


                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.

MODEL                                     21.Z.1         25.Z.1                 32.Z.1         37.Z.1             50.Z.1           61.Z.1
Mean sound pressure level
1m far                    dB(A)             47               49                   51             53                54                58

MODEL                                     36.Z.2     42.Z.2            50.Z.2      64.Z.2    74.Z.2      87.Z.2          100.Z.2    124.Z.2
Mean sound pressure level
1m far                    dB(A)             52        55                54             58      55          56              56         56




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                        - 12 -
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.C.STD. 21.Z.1 unit with PU 1/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 17,0 +
                        - Condenser fans (*)        A  2,2 +
                        - Water pump (*)            A  1,7 =
                        Maximum electric absorption A 20,9


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                         IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                    - 13 -
R407C                                                                                                                                            UNICO.C.STD/ELN “G”
                                                                                        Air cooled liquid chillers with Scroll compressors and centrifugal fans

                                          FANS PERFORMANCE


HOW TO READ THE DIAGRAMS                                                                                                            Reference curve
                                                                                                                        Unit pressure drops + Dynamic pressure
                                                         Fan absorbed power
                                                                                                                         3                          1000 (RPM)
                     (Pa) 700
                                                                                                             2
                              600                                                           1,5                                          3          900
                                                                                                                                         2
                              500                                              1
                                                                                                                                         1          800

                                                                           0,8
                              400                                                                                                            4

                                                                         0,6
                                                                                                        C                                           700
                              300                                                                                                                 660
                                                                   0,4
                                                                                                                                        30          600
             Total pressure




                                                                 0,3




                                                                                                                                                          Fan speed
                              200                                                                                                  25
                                                      (kW) 0,2
                                                                                                   B                                                500
                                    163

                              150
                                                                                                                              20

                                                                                                                         18
                                                                                                   A




                                                                                                                                                                      Relative sound pressure level
                                    113
                                                                                                                                                    400
                              100
                                                                                                                  15
                              90
                                                                                                                 13,5
                              80

                               70
                                                                                    5                                                               300
                                                                                              10
                               60
                                                                       0 dB(A)
                               50
                               45

                                                                                                       6,5
                                                   1,5     2       2,5     3       4        5      6         7    8 9 10                18       (m3/h x 1.000)
                                                                                   Air flow

                                          EXAMPLE:
                                          Unit with nominal air flow of 13.000 m3/h and total pressure 300 Pa.
                                          - Air flow 13.000 m3/h (2 fans x 6.500 m3/h each).
                                          - Unit reference curve = 1.
                                          - Point A. Curve 1 indicates the unit pressure drops + the fan dynamic pressure for total 113 Pa.
                                          - Point B. Standard unit working point with 50 Pa of available pressure for total pressure 163 Pa.
                                          - Point C. Unit working point with 187 Pa of available pressure (see example). Total pressure
                                            113+187=300 Pa.

                                          At the above conditions the following result will be achieved:
                                          - Fan speed 660 RPM.
                                          - Engaged power by each fan 0,8kW. Considering 10% margin one 1,1 Kw motor for each fan is
                                            installed.
                                          - Considering the nominal value, the sound pressure level will increase of the difference between
                                            two working points.
                                            At point B (nominal conditions) correspond 13,5 dB(A), at point C 18 dB(A).
                                            Therefore, 18-13,5=4,5 dB(A), value to be added to the nominal one indicated in technical data
                                            sheet 66+4,5=70,5 dB(A).



RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                                             - 14 -
R407C                                                                                                                      UNICO.C.STD/ELN “G”
                                                                          Air cooled liquid chillers with Scroll compressors and centrifugal fans

FANS PERFORMANCES



                                                                                                         3                              1000 (RPM)
        (Pa) 700
                                                                                             2
             600                                                                1,5                                                     900
                                                                                                                        3
                                                                                                                           2
             500                                             1
                                                                                                                           1            800

                                                        0,8                                                                    5
             400                                                                                                               4
                                                      0,6
                                                                                                                                        700
             300
                                                0,4
                                                                                                                        30              600
                                              0,3

             200                                                                                                   25
                                 (kW) 0,2
                                                                                                                                        500
             150
                                                                                                             20



                                                                                                                                        400
             100
                                                                                                    15
              90

              80

              70
                                                                      5                                                                 300
                                                                                10
              60
                                                      0 dB(A)
              50
              45


                              1,5        2      2,5     3            4         5       6     7      8 9 10              18          (m3/h x 1.000)




UNICO.C.STD
MODEL                                        21.Z.1              25.Z.1                    32.Z.1                 37.Z.1                50.Z.1          61.Z.1
Reference curve                                1                   1                         2                      1                     1               2

MODEL                                        36.Z.2         42.Z.2            50.Z.2         64.Z.2          74.Z.2                87.Z.2     100.Z.2   124.Z.2
Reference curve                                1              1                 1              2               1                     1           1         2


UNICO.C.ELN
MODEL                                        21.Z.1              25.Z.1                    32.Z.1                 37.Z.1                50.Z.1          61.Z.1
Reference curve                                1                   1                         1                      4                     1               1

MODEL                                        36.Z.2         42.Z.2            50.Z.2         64.Z.2          74.Z.2                87.Z.2     100.Z.2   124.Z.2
Reference curve                                4              4                 1              1               1                     1           1         1




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                               - 15 -
R407C                                                                                                           UNICO.C.STD/ELN “G”
                                                                             Air cooled liquid chillers with Scroll compressors and centrifugal fans

                               OPTIONAL

                               CHILLED WATER TANKS
                               Available for all air cooled liquid chillers, size G1 excluded.
                               This optional is made by 2 insulated water tanks, closed in a galvanized steel sheet box and painted.
                               The tank is supplied assembled under the unit, ready to work and with antifreeze electric heater.



CHILLER SIZE                                                          G3                   G5                    G7                  G8
Capacity                                 l                            250                  360                   530                770
Water inlet                              Ø                          2" MPT             2 1/2" MPT              3" MPT              DN100
Water discharge                          Ø MPT                        1/2"                 1/2"                  1/2"               1/2”
Air discharge                            Ø MPT                        1/2"                 1/2"                  1/2"               1/22
Empty weight                             kg                           200                  280                   390                570
Dimensions
                               A         mm                         1.040                  1.200               1.290                1.290
                               B         mm                         1.120                  1.290               1.380                1.410
                               C         mm                         1.210                  1.400               1.520                1.630
                               D         mm                          80                     200                 200                  585
                               E         mm                         2.000                  2.600               3.600                5.170
                               F         mm                          170                    100                 100                  135
                               G         mm                           --                     --                1.600                2.000
Fixing holes                   5         N° x Ø mm                  4x16                   4x20                6x20                 6x20



CHILLED WATER TANKS


                                                                      G3 - G5
                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                                              D
                                                                         5                                 5
                       A
                                                                F
                   B
                   C                                                                       E


                                                                      G7 - G8
                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                    G                                G                   D
                       A
                                                                F           5                              5                                5
                   B
                   C                                                                                   E



                               1.   Water inlet.
                               2.   Water outlet. For exact position see the drawing of the chiller.
                               3.   Pipe for air discharge.
                               4.   Pipe for water drain.
                               5.   Fixing holes.



RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                                  - 16 -
R407C                                                                                                UNICO.C.STD/ELN “G”
                                                                  Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                               HEAT RECLAIM HYDRAULIC CIRCUIT




                                         BGV                                      YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                          COM
                                                           B




                              SUCTION LINE                                TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                         - 17 -
R407C                                                                                             UNICO.C.STD/ELN “G”
                                                               Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                             B



                                             COM




                                 SUCTION LINE                                   TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                      - 18 -
R407C                                                                                                  UNICO.C.STD/ELN “G”
                                                                    Air cooled liquid chillers with Scroll compressors and centrifugal fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            ONE PUMP VERSION - PU.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.

1 pump version                               PU1/1                               PU2/1                                  PU3/1
2 pumps version                              PU1/2                               PU2/2                                  PU3/2
Min. water flow             m3/h               3                                   7                                     15
Max water flow              m3/h               8                                  17                                     30
Total pressure
With min. water flow        kPa               205                                 235                                   225
With max. water flow        kPa               160                                 180                                   175
Installed power (1)         kW                0,55                                1,5                                   2,2
Plate current (1)           A                  1,7                                2,9                                   5,3
Net weight ../1             kg                 50                                  70                                    74
Net weight ../2             kg                 85                                 110                                   112
Sound pressure level (2)    dB(A)              69                                  70                                    70
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME


                                      PU.../1                                                   PU.../2
                       VE                                                        VE
                MA            YS                            MA            MA             YS                              MA




                                                     FL                                                       FL
                                        P                                                         P
                                                                                          RU             YR        RU



                                                                                                              FL
                                                                                                  P
                            MA Manometer                                                  RU             YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch



RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                           - 19 -
R407C                                                                                            UNICO.C.STD/ELN “G”
                                                              Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.C.STD.21.Z.1 = 65 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 65-3 = 62 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                            750




                        Chiller size                    G1          G3         G5          G7          G8
                        Weight                    kg    50          80         110         150         200




                         WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                     - 20 -
R407C                                                                                               UNICO.C.STD/ELN “G”
                                                                 Air cooled liquid chillers with Scroll compressors and centrifugal fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                  R...                              G...
                                           Light                                Medium                             Heavy
AxB                     mm                 Ø124                                 114x174                           208x208
C                       mm                  90                                    90                                122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                           C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRL_CG_GB407_0203                        - 21 -
R407C   UNICO.SCREW.A.STD/ELN “G”
          Air cooled liquid chillers with Screw compressors and axial fans




                                                 SCREW compressors
                                                      250 ÷ 385 kW




                                             RC GROUP
                                    TECHNICAL DOCUMENTATION
                                    UNCSRW_AG_GB407_0203
R407C                                                                              UNICO.SCREW.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -2-
R407C                                                                             UNICO.SCREW.A.STD/ELN “G”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 capacity control step for each compressor.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Star/Delta starting system.
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -3-
R407C                                                                              UNICO.SCREW.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -4-
R407C                                                                                    UNICO.SCREW.A.STD/ELN “G”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                 250.V.1          330.V.1            385.V.1         264.V.2          330.V.2          400.V.2
SIZE                                     G8               G9                 G9              G8               G9               G9
COOLING CAPACITY (1)    kW              249             312,2              385,4           261,5            312,6            352,5
COMPRESSORS (1)         n.                1               1                  1                2                2               2
Power input             kW              79,7             90,8              127,7            97,3             94,2            113,8
Absorbed current        A              133,7            152,4              214,7           163,5            158,6            191,2
Max absorbed current    A               156              186                239             184              192              232
Starting current        A               495              276                374             386              459              385
FANS                    n.                5               6                  6                5                6               6
Air flow                m3/h           77500           108000             108000           77500           108000           108000
Power input             kW              7,75             9,3                9,3             7,75             9,3              9,3
Max absorbed current    A               15,5             18,6               18,6            15,5             18,6             18,6
EVAPORATOR (1)          n.                1               1                  1                1                1               1
Water flow              m3/h            42,7             53,6               66,1            44,9             53,6             60,5
Pressure drops          kPa             33,9             35,3               38,7            37,4             35,4             32,4
Water content           l                93               88                 80              93               88               80
Max water flow          m3/h             65               68                 70              65               68               70
GAS CIRCUITS            n.                1               1                  1                2                2               2
CAPACITY STEPS          n.                3               3                  3                6                6               6
DESUPERHEATER (2)
Heating capacity        kW               77,7             97,4             120,3            81,6             97,5             110
Water flow              m3/h             13,5              17              20,9             14,2              17              19,2
Pressure drops          kPa              17,4             21,5             22,4             13,9             12,9             16,4
Water content           l
Max water flow          m3/h             32                38               38              20,8              32               32
PUMPING GROUP
1 pump group              PU             4/1              5/1.G            5/1.G             4/1            5/1.G            5/1.G
1 pump group              PU-LN           --                --               --               --              --               --
2 pumps group             PU             4/2              5/2.G            5/2.G              --            5/2.G            5/2.G
2 pumps group             PU-LN           --                --               --               --              --               --
DIMENSIONS
Lenght                  mm              5170              5900             5900             5170             5900            5900
Width                   mm              1290              1540             1540             1290             1540            1540
Height                  mm              2215              2470             2470             2215             2470            2470
NET WEIGHT              kg              2450              3270             3330             2490             3325            3380
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER              3,12             3,44             3,02             2,69             3,32             3,10
Standard capacity steps IPLV             4,59             5,05             4,44             3,95             4,88             4,55
Standard capacity steps EMPE             3,53             3,89             3,41             3,04             3,75             3,50




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                            -5-
R407C                                                                              UNICO.SCREW.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    250.V.1       330.V.1        385.V.1         264.V.2          330.V.2          400.V.2
Sound pressure level
1m far                   dB(A)             78            79             79               78               79               79
5m far                   dB(A)            66,6          69,2           69,2             66,6             69,2             69,2
10m far                  dB(A)            60,8          63,5           63,5             60,8             63,5             63,5




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    250.V.1       330.V.1        385.V.1         264.V.2          330.V.2          400.V.2
Mean sound pressure level
1m far                    dB(A)            72            73             73               72               73               73




                         UNICO.SCREW.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    250.V.1       330.V.1        385.V.1         264.V.2          330.V.2          400.V.2
Sound pressure level
1m far                   dB(A)            71,8          72,8           72,8             71,8             72,8             72,8
5m far                   dB(A)            60,4           63             63              60,4              63               63
10m far                  dB(A)            54,6          57,3           57,3             54,6             57,3             57,3




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    250.V.1       330.V.1        385.V.1         264.V.2          330.V.2          400.V.2
Mean sound pressure level
1m far                    dB(A)            66            66             66               65               66               66




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -6-
R407C                                                                             UNICO.SCREW.A.STD/ELN “G”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 capacity control step for each compressor.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Star/Delta starting system.
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                             44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.


RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -7-
R407C                                                                              UNICO.SCREW.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     -8-
R407C                                                                                    UNICO.SCREW.A.STD/ELN “G”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

MODEL                                  165.V.1            200.V.1          250.V.1          330.V.1         264.V.2          330.V.2
SIZE                                      G8                 G8               G9               G9              G9               G9
COOLING CAPACITY (1)    kW              152,9               171             251,3            285,9           264,2            285,5
COMPRESSORS (1)         n.                 1                  1                1                1               2                2
Power input             kW               48,6               59,1             78,7            100,8            96,3            104,8
Absorbed current        A                81,8               99,4            132,1            169,3           161,8            176,3
Max absorbed current    A                 96                116              156              186             184              192
Starting current        A                373                280              495              276             386              459
FANS                    n.                 6                  6                6                6               6                6
Air flow                m3/h            45000              45000            70000            70000           70000            70000
Power input             kW                6,6                6,6              9,3              9,6             9,3             9,3
Max absorbed current    A                 12                 12              18,6             18,6            18,6             18,6
EVAPORATOR (1)          n.                 1                  1                1                1               1                1
Water flow              m3/h             26,2               29,3             43,1              49             45,3              49
Pressure drops          kPa              43,4               28,1             34,5             29,6            38,2             29,6
Water content           l                 39                 48               93               88              93               88
Max water flow          m3/h              30                 41               65               68              65               68
GAS CIRCUITS            n.                 1                  1                1                1               2                2
CAPACITY STEPS          n.                 3                  3                3                3               6                6
DESUPERHEATER (2)
Heating capacity        kW               47,7              53,3              78,4            89,2             82,4             89,1
Water flow              m3/h              8,3               9,3              13,7            15,5             14,4             15,5
Pressure drops          kPa              12,3              15,4              17,7            18,1             14,2             10,8
Water content           l
Max water flow          m3/h              16                16                32              38              20,8              32
PUMPING GROUP
1 pump group              PU              3/1               4/1             5/1.G            5/1.G           5/1.G            5/1.G
1 pump group              PU-LN            --                --               --               --              --               --
2 pumps group             PU              3/2               4/2             5/2.G            5/2.G           5/2.G            5/2.G
2 pumps group             PU-LN            --                --               --               --              --               --
DIMENSIONS
Lenght                  mm               5170              5170             5900             5900             5900            5900
Width                   mm               1290              1290             1540             1540             1540            1540
Height                  mm               2280              2280             2470             2470             2470            2470
NET WEIGHT              kg               1960              2040             3000             3295             3480            3720
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER              3,15              2,89              3,19            2,84             2,74             2,72
Standard capacity steps IPLV             4,62              4,25              4,69            4,17             4,03             4,00
Standard capacity steps EMPE             3,56              3,27              3,61            3,21             3,10             3,08




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                            -9-
R407C                                                                                UNICO.SCREW.A.STD/ELN “G”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    165.V.1       200.V.1          250.V.1          330.V.1         264.V.2          330.V.2
Sound pressure level
1m far                   dB(A)             60            60                68              68               68               68
5m far                   dB(A)            50,2          50,2              58,2            58,2             58,2             58,2
10m far                  dB(A)            44,5          44,5              52,5            52,5             52,5             52,5




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    165.V.1       200.V.1          250.V.1          330.V.1         264.V.2          330.V.2
Mean sound pressure level
1m far                    dB(A)            54            54                62              62               62               62




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     - 10 -
R407C                                                                                 UNICO.SCREW.A.STD/ELN “G”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.STD. 250.V.1 unit with PU 4/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 156,0 +
                        - Condenser fans (*)        A  15,5 +
                        - Water pump (*)            A   9,6 =
                        Maximum electric absorption A 181,1


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                    - 11 -
R407C                                                                                             UNICO.SCREW.A.STD/ELN “G”
                                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                               OPTIONAL

                               CHILLED WATER TANKS - UNITS SIZE G8
                               Available for all air cooled liquid chillers.
                               This optional is made by 2 insulated water tanks, closed in a galvanized steel sheet box and painted.
                               The tank is supplied assembled under the unit, ready to work and with antifreeze electric heater.



CHILLER SIZE                                                                                 G8
Capacity                                 l                                                   770
Water inlet                              Ø                                                  DN100
Water discharge                          Ø MPT                                               1/2”
Air discharge                            Ø MPT                                               1/2”
Empty weight                             kg                                                  570
Dimensions
                               A         mm                                                  1.290
                               B         mm                                                  1.410
                               C         mm                                                  1.630
                               D         mm                                                   585
                               E         mm                                                  5.170
                               F         mm                                                   135
                               G         mm                                                  2.000
Fixing holes                   5         N° x Ø mm                                           6x20



CHILLED WATER TANKS G8



                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                  G                                G                 D
                       A
                                                                F         5                                5                            5
                   B
                   C                                                                                   E




                               1.   Water inlet.
                               2.   Water outlet. For exact position see the drawing of the chiller.
                               3.   Pipe for air discharge.
                               4.   Pipe for water drain.
                               5.   Fixing holes.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                                  - 12 -
R407C                                                                                          UNICO.SCREW.A.STD/ELN “G”
                                                                          Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CHILLED WATER TANKS - UNITS SIZE G9
                        This optional is made by 3 insulated water tanks, supplied assembled inside the unit, ready to work
                        and with antifreeze electric heater. The tank does not modify the water chiller overall dimensions.


Capacity                    l                                                           400
Water outlet                Ø DN Victaulic                                              100
Water discharge             Ø MPT                                                       1/2"
Air discharge               Ø MPT                                                       1/2"
Empty weight                kg                                                          200




CHILLED WATER TANKS G9




                                                                                    COMPRESSOR
                                               494
                                                     350
                                                           206




                                                                  500
        100            1540                                        545          4   2      3




                        2. Water outlet.
                        3. Pipe for air discharge.
                        4. Pipe for water drain.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                           - 13 -
R407C                                                                                     UNICO.SCREW.A.STD/ELN “G”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                      - 14 -
R407C                                                                                        UNICO.SCREW.A.STD/ELN “G”
                                                                          Air cooled liquid chillers with Screw compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS - UNITS SIZE G8

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.

1 pump version                                              PU3/1                                     PU4/1
2 pumps version                                             PU3/2                                     PU4/2
Min. water flow             m3/h                             15                                        30
Max water flow              m3/h                             30                                        55
Total pressure
With min. water flow        kPa                             225                                        235
With max. water flow        kPa                             175                                        185
Installed power (1)         kW                              2,2                                         4
Plate current (1)           A                               5,3                                        9,6
Net weight ../1             kg                               74                                        112
Net weight ../2             kg                              112                                        164
Sound pressure level (2)    dB(A)                           70                                          72
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME G8


                                      PU.../1                                                   PU.../2
                       VE                                                        VE
                MA            YS                            MA             MA           YS                              MA




                                                   FL                                                         FL
                                        P                                                         P
                                                                                         RU              YR        RU



                                                                                                              FL
                                                                                                  P
                            MA Manometer                                                 RU              YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch



RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                           - 15 -
R407C                                                                                     UNICO.SCREW.A.STD/ELN “G”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS - UNITS SIZE G9

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU 5/1.G
                            Pumping group with one in line pump type.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - Water safety flow switch
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU 5/2.G
                            Pumping group with twin in line pump type. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - Water safety flow switch
                            - 2 poles electric motor.




1 pump version                                              PU5/1.G                                   --
2 pumps version                                               --                                    PU5/2.G
Min. water flow             m3/h                              40                                      40
Max water flow              m3/h                              75                                      75
Total pressure
With min. water flow        kPa                              185                                      225
With max. water flow        kPa                              170                                      145
Installe power (1)          kW                               5,5                                      5,5
Plate current (1)           A                                11                                        11
Net weight ../1             kg                               95                                        --
Net weight ../2             kg                                --                                      186
Sound pressure level (2)    dB(A)                            78                                        78
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME - G9


              VE                                                              VE
                      YS                                                             YS




                                                                                                P
                                             FL                                                               FL
                                 P




                            VE   Expansion tank
                            YS   Safety valve
                            P    Water pump
                            FL   Water flow switch




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                          - 16 -
R407C                                                                                UNICO.SCREW.A.STD/ELN “G”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREW.A.STD.250.V.1 = 78 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 78-3 = 75 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                         750




                        Chiller size                       G8               G9
                        Weight                 kg          200              260




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                     - 17 -
R407C                                                                                   UNICO.SCREW.A.STD/ELN “G”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_AG_GB407_0203                        - 18 -
R407C   UNICO.SCREW.A.STD/ELN “U”
          Air cooled liquid chillers with Screw compressors and axial fans




                                                 SCREW compressors
                                                     475 ÷ 1040 kW




                                             RC GROUP
                                    TECHNICAL DOCUMENTATION
                                    UNCSRW_AU_GB407_0203
R407C                                                                              UNICO.SCREW.A.STD/ELN “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -2-
R407C                                                                             UNICO.SCREW.A.STD/ELN “U”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 capacity control steps for each compressor.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Star/Delta starting system.
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • Part-Winding starting system.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -3-
R407C                                                                              UNICO.SCREW.A.STD/ELN “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - STD units: PU pumping group with 2 poles water pumps.
                          - STD + kit LNO: PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -4-
R407C                                                                                  UNICO.SCREW.A.STD/ELN “U”
                                                                      Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                       480.V.1         580.V.1        450.V.2         500.V.2        580.V.2         660.V.2
SIZE                                          U10             U10            U10             U10            U11             U11
COOLING CAPACITY (1)    kW                   475,9           513,9          421,5           467,3          540,4           571,9
COMPRESSORS (1)         n.                     1               1              2               2              2               2
Power input             kW                   155,5           165,1          136,8           166,4          177,3           198,8
Absorbed current        A                    260,2           276,1          229,6           278,9          297,4           333,7
Max absorbed current    A                     287             310            272             311            342             372
Starting current        A                     543             595            600             635            416             444
FANS                    n.                     8               8              8               8              10              10
Air flow                m3/h                138000          132000         138000          138000         172500          172500
Power input             kW                   11,2             11,2          11,2             11,2            14              14
Max absorbed current    A                    21,6             21,6          21,6             21,6            27              27
EVAPORATOR (1)          n.                     1               1              1               1              1               1
Water flow              m3/h                 81,7            88,2           72,3             80,2          92,7             98,1
Pressure drops          kPa                  35,8            42,9           28,1             34,5          45,7             51,2
Water content           l                     125             114            133             133            114             114
Max water flow          m3/h                  100             100            100             100            105             105
GAS CIRCUITS            n.                     1               1              2               2              2               2
CAPACITY STEPS          n.                     3               3              6               6              6               6
DESUPERHEATER (2)
Heating capacity        kW                   148,5           160,3          131,5           145,8          168,6           178,4
Water flow              m3/h                 25,9            27,9           22,9             25,4          29,4             31,1
Pressure drops          kPa                  34,2            34,8           23,5             28,8          23,8             18,1
Water content           l
Max water flow          m3/h                   38             38              32             32              54             76
100% HEAT RECLAIM (2)
Heating capacity        kW                   646,3           695,3          562,1           652,3          727,4           791,4
Water flow              m3/h                 115,1           123,8          97,2            116,3          129,7           141,1
Pressure drops          kPa                  61,3            46,7           64,8             60,5          57,3             53,4
Water content           l
Max water flow          m3/h                  130             155            102             130            150             170
PUMPING GROUP
1 pump group              PU                   6/1            6/1             6/1            6/1             6/1            7/1
1 pump group              PU-LN                6/1            6/1             6/1            6/1             6/1            7/1
2 pumps group             PU                   6/2            6/2             6/2            6/2             6/2            7/2
2 pumps group             PU-LN                6/2            6/2             6/2            6/2             6/2            7/2
DIMENSIONS
Lenght                  mm                    5500           5500            5500           5500            6490           6490
Width                   mm                    2130           2130            2130           2130            2130           2130
Height                  mm                    2430           2430            2430           2430            2430           2430
NET WEIGHT              kg                    3950           3990            4080           4180            4730           4740
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                   3,06           3,11            3,08           2,81            3,05           2,88
Standard capacity steps IPLV                  4,50           4,58            4,53           4,13            4,48           4,23
Standard capacity steps EMPE                  3,46           3,52            3,48           3,17            3,44           3,25




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                        -5-
R407C                                                                                  UNICO.SCREW.A.STD/ELN “U”
                                                                      Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                       715.V.2         770.V.2        865.V.2         960.V.2        1060.V.2       1160.V.2
SIZE                                          U12             U12            U13             U13             U14            U14
COOLING CAPACITY (1)    kW                   679,6           738,7          879,5            948           1013,9          1037
COMPRESSORS (1)         n.                     2               2              2               2               2              2
Power input             kW                   227,3            267           282,6           317,1           318,1          331,4
Absorbed current        A                    381,9            449            474            530,8           532,2          554,2
Max absorbed current    A                     425             477            525             573             597            620
Starting current        A                     542             589            758             801             853            874
FANS                    n.                    12               12             14              14              16             16
Air flow                m3/h                207000          207000         231000          231000          264000         264000
Power input             kW                   16,8            16,8           19,6             19,6           22,4            22,4
Max absorbed current    A                    32,4            32,4           37,8             37,8           43,2            43,2
EVAPORATOR (1)          n.                     1               1              1               1               1              1
Water flow              m3/h                 116,6           126,8          150,9           162,7            174           177,9
Pressure drops          kPa                  33,6            39,7           68,6             79,7           43,9            45,9
Water content           l                     207             207            184             184             252            252
Max water flow          m3/h                 151,1           151,1           180             180             200            200
GAS CIRCUITS            n.                     2               2              2               2               2              2
CAPACITY STEPS          n.                     6               6              6               6               6              6
DESUPERHEATER (2)
Heating capacity        kW                    212            230,5          274,4           295,8          316,4           323,5
Water flow              m3/h                  36,9            40,1          47,8             51,5          55,1             56,4
Pressure drops          kPa                   20,9            20,6          27,3             29,6          32,9             33,4
Water content           l
Max water flow          m3/h                   76             76              76             76              76             76
100% HEAT RECLAIM (2)
Heating capacity        kW                   923,3          1030,2          1181,9         1303,4          1357,6         1401,8
Water flow              m3/h                 164,6           170             210,6         232,1            241,7         249,5
Pressure drops          kPa                  74,9            82,4            76,6           62,3            54,2           47,4
Water content           l
Max water flow          m3/h                  170             170            215             260            285             310
PUMPING GROUP
1 pump group              PU                   8/1            8/1             9/1            9/1             9/1            9/1
1 pump group              PU-LN                8/1            8/1             9/1            9/1             9/1            9/1
2 pumps group             PU                   8/2            8/2             9/2            9/2             9/2            9/2
2 pumps group             PU-LN                8/2            8/2             9/2            9/2             9/2            9/2
DIMENSIONS
Lenght                  mm                    7480           7480            8470           8470            9460           9460
Width                   mm                    2130           2130            2130           2130            2130           2130
Height                  mm                    2430           2430            2430           2430            2430           2430
NET WEIGHT              kg                    5390           5500            6460           6720            7340           7360
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                   2,99           2,77            3,11           2,99            3,19           3,13
Standard capacity steps IPLV                  4,40           4,07            4,57           4,39            4,69           4,60
Standard capacity steps EMPE                  3,38           3,13            3,52           3,38            3,60           3,54




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                        -6-
R407C                                                                                UNICO.SCREW.A.STD/ELN “U”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                       480.V.1       580.V.1         450.V.2         500.V.2        580.V.2         660.V.2
Sound pressure level
1m far                   dB(A)                 79            79              80             80              80             80
5m far                   dB(A)                68,5          68,5            69,5           68,6            68,6           68,6
10m far                  dB(A)                62,6          62,6            63,6           62,8            62,8           62,8

MODEL                                       715.V.2       770.V.2         865.V.2         960.V.2        1060.V.2       1160.V.2
Sound pressure level
1m far                   dB(A)                 81            81              82             82              82             82
5m far                   dB(A)                71,2          71,2            71,4           71,4            72,7           72,7
10m far                  dB(A)                65,5          65,5            65,8           65,8            67,3           67,3

                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                       480.V.1       580.V.1         450.V.2         500.V.2        580.V.2         660.V.2
Mean sound pressure level
1m far                    dB(A)                75           75               76             76              76             76

MODEL                                       715.V.2       770.V.2         865.V.2         960.V.2        1060.V.2       1160.V.2
Mean sound pressure level
1m far                    dB(A)                77           77               78             78              78             78




                         UNICO.SCREW.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                       480.V.1       580.V.1         450.V.2         500.V.2        580.V.2         660.V.2
Sound pressure level
1m far                   dB(A)                72,8          72,8            73,8           73,8            73,8           73,8
5m far                   dB(A)                62,3          62,3            63,3           62,4            62,4           62,4
10m far                  dB(A)                56,4          56,4            57,4           56,6            56,6           56,6

MODEL                                       715.V.2       770.V.2         865.V.2         960.V.2        1060.V.2       1160.V.2
Sound pressure level
1m far                   dB(A)                74,8          74,8            75,8           75,8            75,8           75,8
5m far                   dB(A)                 65            65             65,2           65,2            66,5           66,5
10m far                  dB(A)                59,3          59,3            59,6           59,6            61,1           61,1

                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                       480.V.1       580.V.1         450.V.2         500.V.2        580.V.2         660.V.2
Mean sound pressure level
1m far                    dB(A)                69           69               70             70              70             70

MODEL                                       715.V.2       770.V.2         865.V.2         960.V.2        1060.V.2       1160.V.2
Mean sound pressure level
1m far                    dB(A)                71           71               72             72              72             72




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.

RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -7-
R407C                                                                             UNICO.SCREW.A.STD/ELN “U”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 capacity control steps for each compressor.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Star/Delta starting system.
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                             44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -8-
R407C                                                                              UNICO.SCREW.A.STD/ELN “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     -9-
R407C                                                                                  UNICO.SCREW.A.STD/ELN “U”
                                                                      Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

MODEL                                       385.V.1         480.V.1        580.V.1         400.V.2        450.V.2         500.V.2
SIZE                                          U10             U11            U11             U10            U11             U11
COOLING CAPACITY (1)    kW                    381            484,2          512,4           348,8          425,2            472
COMPRESSORS (1)         n.                     1               1              1               2              2               2
Power input             kW                   129,3           154,4          165,7           115,1          135,5           164,6
Absorbed current        A                    217,5           258,4          277,1           193,4          227,5           275,9
Max absorbed current    A                     239             287            310             232            272             311
Starting current        A                     374             543            595             385            600             635
FANS                    n.                     8               10            10               8              10              10
Air flow                m3/h                104000          130000         122500          104000         130000          130000
Power input             kW                    7,5             9,4            9,4             7,5            9,4             9,4
Max absorbed current    A                    13,6              17             17             13,6            17              17
EVAPORATOR (1)          n.                     1               1              1               1              1               1
Water flow              m3/h                 65,4             83,1          87,9             59,9            73              81
Pressure drops          kPa                  37,8             38,1          42,6             31,7          28,6             35,2
Water content           l                     80              125            114              80            133             133
Max water flow          m3/h                  70              100            100              70            100             100
GAS CIRCUITS            n.                     1               1              1               2              2               2
CAPACITY STEPS          n.                     3               3              3               6              6               6
DESUPERHEATER (2)
Heating capacity        kW                   118,9           151,1          159,9           108,8          132,7           147,3
Water flow              m3/h                 20,7             26,3          27,8              19           23,1             25,7
Pressure drops          kPa                  21,9            35,4           34,6             16,1          23,9             29,4
Water content           l
Max water flow          m3/h                   38             38              38             32              32             32
100% HEAT RECLAIM (2)
Heating capacity        kW                    516            651,3          695,3           463,4          562,1           652,3
Water flow              m3/h                  88,1            116           123,8             74           97,2            116,3
Pressure drops          kPa                   49,4            62,2          46,7             64,8          64,8             60,5
Water content           l
Max water flow          m3/h                  88,1            130            155             74             102             130
PUMPING GROUP
1 pump group              PU                    --             --              --             --              --             --
1 pump group              PU-LN                5/1            6/1             6/1            5/1             6/1            6/1
2 pumps group             PU                    --             --              --             --              --             --
2 pumps group             PU-LN                5/2            6/2             6/2            5/1             6/2            6/2
DIMENSIONS
Lenght                  mm                    5500           6490            6490           5500            6490           6490
Width                   mm                    2130           2130            2130           2130            2130           2130
Height                  mm                    2430           2430            2430           2430            2430           2430
NET WEIGHT              kg                    3610           4450            4490           3890            4580           4680
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                   2,95           3,14            3,09           3,03            3,14           2,87
Standard capacity steps IPLV                  4,33           4,61            4,55           4,45            4,61           4,22
Standard capacity steps EMPE                  3,33           3,54            3,49           3,42            3,55           3,24




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                       - 10 -
R407C                                                                                  UNICO.SCREW.A.STD/ELN “U”
                                                                      Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

MODEL                                       580.V.2         660.V.2        715.V.2         770.V.2        865.V.2         960.V.2
SIZE                                          U12             U12            U13             U13            U14             U14
COOLING CAPACITY (1)    kW                   539,2           570,5          680,9           740,3          848,6           912,7
COMPRESSORS (1)         n.                     2               2              2               2              2               2
Power input             kW                   177,7           199,3          226,8           266,4          291,1            328
Absorbed current        A                    298,1           334,6          381,1            448           488,3            550
Max absorbed current    A                     342             372            425             477            525             573
Starting current        A                     416             444            542             589            758             801
FANS                    n.                    12               12            14               14             16              16
Air flow                m3/h                156000          156000         171500          171500         196000          196000
Power input             kW                   11,3             11,3          13,2             13,2            15              15
Max absorbed current    A                    20,4            20,4           23,8             23,8          27,2             27,2
EVAPORATOR (1)          n.                     1               1              1               1              1               1
Water flow              m3/h                 92,5             97,9          116,8            127           145,6           156,6
Pressure drops          kPa                  45,5              51           33,7            39,9           53,2             61,6
Water content           l                     114             114            207             207            185             185
Max water flow          m3/h                  105             105           151,1           151,1           200             200
GAS CIRCUITS            n.                     2               2              2               2              2               2
CAPACITY STEPS          n.                     6               6              6               6              6               6
DESUPERHEATER (2)
Heating capacity        kW                   168,2            178           212,5           231            264,8           284,8
Water flow              m3/h                 29,3              31            37             40,2           46,1             49,6
Pressure drops          kPa                  23,7              18            21             20,7           25,4             27,5
Water content           l
Max water flow          m3/h                   54             76              76             76              76             76
100% HEAT RECLAIM (2)
Heating capacity        kW                   727,4           791,4          923,3          1030,2          1174,4         1294,8
Water flow              m3/h                 129,7           141,1          164,6           170             209,3         230,6
Pressure drops          kPa                  57,3            53,4           74,9            82,4            75,6           61,5
Water content           l
Max water flow          m3/h                  150             170            170             170            215             260
PUMPING GROUP
1 pump group              PU                    --             --              --             --              --             --
1 pump group              PU-LN                6/1            7/1             8/1            8/1             9/1            9/1
2 pumps group             PU                    --             --              --             --              --             --
2 pumps group             PU-LN                6/2            7/2             8/2            8/2             9/2            9/2
DIMENSIONS
Lenght                  mm                    7480           7480            8470           8470            9460           9460
Width                   mm                    2130           2130            2130           2130            2130           2130
Height                  mm                    2430           2430            2430           2430            2430           2430
NET WEIGHT              kg                    5260           5270            6080           6200            6980           7240
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                   3,03           2,86            3,00           2,78            2,92           2,78
Standard capacity steps IPLV                  4,46           4,21            4,41           4,08            4,29           4,09
Standard capacity steps EMPE                  3,43           3,23            3,39           3,14            3,29           3,14




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                       - 11 -
R407C                                                                                UNICO.SCREW.A.STD/ELN “U”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                       385.V.1       480.V.1         580.V.1         400.V.2        450.V.2         500.V.2
Sound pressure level
1m far                   dB(A)                 66            66              66             67              67             67
5m far                   dB(A)                55,5          54,6            54,6           56,5            55,6           55,6
10m far                  dB(A)                49,6          48,8            48,8           50,6            49,8           49,8

MODEL                                       580.V.2       660.V.2         715.V.2         770.V.2        865.V.2         960.V.2
Sound pressure level
1m far                   dB(A)                 67            67              68             68              68             68
5m far                   dB(A)                57,2          57,2            57,4           57,4            58,7           58,7
10m far                  dB(A)                51,5          51,5            51,8           51,8            53,3           53,3




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                       385.V.1       480.V.1         580.V.1         400.V.2        450.V.2         500.V.2
Mean sound pressure level
1m far                    dB(A)                62            62              62             63              63             63

MODEL                                       580.V.2       660.V.2         715.V.2         770.V.2        865.V.2         960.V.2
Mean sound pressure level
1m far                    dB(A)                63            63              64             64              64             64




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                     - 12 -
R407C                                                                                 UNICO.SCREW.A.STD/ELN “U”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.STD. 481.V.1 unit with PU 6/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 287,0 +
                        - Condenser fans (*)        A  21,6 +
                        - Water pump (*)            A  16,0 =
                        Maximum electric absorption A 324,6


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                    - 13 -
R407C                                                                                       UNICO.SCREW.A.STD/ELN “U”
                                                                           Air cooled liquid chillers with Screw compressors and axial fans

                         OPTIONAL

                         CHILLED WATER TANKS
                         This optional is made by an insulated horizontal water tank supplied assembled inside the unit, with
                         antifreeze electric heater and ready to work. The tank does not modify the water chiller overall
                         dimensions.


Capacity                       l               1.400              2.000                   2.500                   3.000
Connections                    Ø                                                  See the chiller drawing
Air discharge                  Ø MPT           1/2"                1/2"                    1/2"                   1/2"
Water drain                    Ø MPT           1/2"                1/2"                    1/2"                   1/2"
Empty weight                   kg              370                  633                    761                     900
Dimensions                     A mm            600                 730                     730                    730
                               B mm            900                 1140                   1110                    1110
                               C mm            1600                1600                   1600                    1600




UNICO.SCREW.A.STD
MODEL                                         480.V.1       580.V.1            450.V.2         500.V.2           580.V.2               660.V.2
Capacity                       l               2000          2000               2000            2000              2000                  2000

MODEL                                         715.V.2       770.V.2            865.V.2         960.V.2           1060.V.2          1160.V.2
Capacity                       l               2500          2500               2500            2500               3000              3000




UNICO.SCREW.A.ELN
MODEL                                         385.V.1        480.V.1            580.V.1         400.V.2           450.V.2              500.V.2
Capacity                       l               1400           2000               2000            1400              2000                 2000

MODEL                                         580.V.2        660.V.2            715.V.2         770.V.2           865.V.2              960.V.2
Capacity                       l               2000           2000               2500            2500              2500                 2500




CHILLED WATER TANK




                                                                                                                          2a




                                                                                                                           1
                                                                                                                                       C




                                                                                                                          2
                                                                                                                                   B
                                                                                                                               A




                  1065                 1065                            3                                     4



                         1.    Water inlet.
                         2.    Water outlet.
                         2a.   Water outlet with pumping group.
                         3.    Air discharge.
                         4.    Water drain.


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                        - 14 -
R407C                                                                                    UNICO.SCREW.A.STD/ELN “U”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                        YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                         COM
                                                           B




                              SUCTION LINE                                 TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                         - 15 -
R407C                                                                                     UNICO.SCREW.A.STD/ELN “U”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                      - 16 -
R407C                                                                                         UNICO.SCREW.A.STD/ELN “U”
                                                                           Air cooled liquid chillers with Screw compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU.../1 • PU-LN.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.

                            TWO PUMPS VERSION - PU.../2 • PU-LN.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.
                                            2 POLES                                             4 POLES
1 pump version                   PU5/1 PU6/1 PU7/1 PU8/1 PU9/1                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
2 pumps version                  PU5/2 PU6/2 PU7/2 PU8/2 PU9/2                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
Min. water flow             m3/h 37,8    75     75   75   108                   37,8      75        75      75      108
Max water flow              m3/h  84    150    168  180   240                    84      132       168     180      210
Total pressure
With min. water flow        kPa     220     200     275     340     300          205           215        262          312       293
With max. water flow        kPa     155     130     160     180     190          171           127        159          198        140
Installed power (1)         kW      5,5     7,5      11      15     18,5          5,5          7,5         11           15         15
Plate current (1)           A       12      16      22,5     30     35,1         12,5          16         21,8         28,5      28,5
Net weight ../1             kg      270     320     370     390     450          360           390        540          560       600
Net weight ../2             kg      450     520     610     650     750          600           650        890          930       1000
Sound pressure level (2)    dB(A)    78      78      82      82      82           69            69         74           74         74

(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME

                                      PU.../1                                                        PU.../2
                       VE                                                         VE
                MA            YS                             MA             MA           YS                                MA




                                                   FL                                                            FL
                                        P                                                            P
                                                                                          RU              YR          RU



                            MA Manometer                                                             P
                                                                                                                 FL
                            VE Expansion tank                                             RU              YR          RU

                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch


RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                            - 17 -
R407C                                                                               UNICO.SCREW.A.STD/ELN “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREWA.STD.480.V.1 = 79 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 79-3 =76 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               U10         U11         U12         U13          U14
                        Weight               kg    310         375         440         505          570




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                    - 18 -
R407C                                                                                   UNICO.SCREW.A.STD/ELN “U”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_AU_GB407_0203                        - 19 -
R407C     UNICO.SCREW.A.STD “M”
        Air cooled liquid chillers with Screw compressors and axial fans




                                               SCREW compressors
                                                   540 ÷ 2055 kW




                                           RC GROUP
                                  TECHNICAL DOCUMENTATION
                                  UNCSRW_AM_GB407_0203
R407C                                                                                   UNICO.SCREW.A.STD “M”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                     -2-
R407C                                                                                  UNICO.SCREW.A.STD “M”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel profiles.
                        • Internal supporting frame made of galvanized steel profiles.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 additional control steps for each compressor on unit V.2.
                        • 2 additional control steps for each compressor on unit V.3 - V.4.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Star/Delta starting system.
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.


                        WARNING
                        “M+M”units, from model 1750.S.4 up to model 2190.S.4, are supplied in two sections for transport
                        and handling needs.
                        The main section includes the electric box, one evaporator and two compressors.
                        The second section includes one evaporator and two compressors.
                        The chiller is internally scheduled for the electrical connections between the two sections.

RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                    -3-
R407C                                                                                   UNICO.SCREW.A.STD “M”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Sound absorption box, with special deadening material, for each compressor.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" "N+O" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                     -4-
R407C                                                                                         UNICO.SCREW.A.STD “M”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                    580.V.2      660.V.2          715.V.2     770.V.2       865.V.2      960.V.2      1060.V.2
SIZE                                      M16          M16               M17         M17           M18          M18           M19
COOLING CAPACITY (1)    kW                539,1        570,4             686        746,6         873,2        940,8        1012,5
COMPRESSORS (1)         n.                  2            2                2           2             2            2             2
Power input             kW                177,7        199,4             225        264,1         284,9        320,1         318,6
Absorbed current        A                 298,2        334,7             378        444,2         477,9        535,9          533
Max absorbed current    A                  342          372              425         477           525          573           597
Starting current        A                  416          444              542         589           758          801           853
FANS                    n.                  8            8                10          10            12           12            14
Air flow                m3/h             158000       158000           197500      197500        237000       237000        276500
Power input             kW                11,2         11,2               14          14           16,8         16,8         19,6
Max absorbed current    A                 21,6         21,6               27          27           32,4         32,4         37,8
EVAPORATOR (1)          n.                  1            1                1           1             1            1             1
Water flow              m3/h              92,5         97,9             117,7       128,1         149,8        161,4         173,7
Pressure drops          kPa               45,5         50,9              34,2        40,6          67,6         78,5         43,7
Water content           l                  114          114              207         207           184          184           252
Max water flow          m3/h               105          105             151,1       151,1          180          180           200
GAS CIRCUITS            n.                  2            2                2           2             2            2             2
CAPACITY STEPS          n.                  6            6                6           6             6            6             6
DESUPERHEATER (2)
Heating capacity        kW                168,2           178           214          233          272,4        293,5        315,9
Water flow              m3/h              29,3            31            37,3         40,6          47,5         51,1          55
Pressure drops          kPa               23,7            18            21,3         21,1          26,9         29,2         32,8
Water content           l
Max water flow          m3/h                54            76             76           76           76            76           76
100% HEAT RECLAIM (2)
Heating capacity        kW                727,4        791,4           923,3        1030,2       1181,9       1303,4        1357,6
Water flow              m3/h              129,7        141,1           164,6         170         210,6        232,1         241,7
Pressure drops          kPa               57,3         53,4            74,9          82,4         76,6         62,3          54,2
Water content           l
Max water flow          m3/h               150            170           170          170           215          260          285
DIMENSIONS
Lenght                  mm                5000          5000            6070         6070         7140         7140          8210
Width                   mm                2350          2350            2350         2350         2350         2350          2350
Height                  mm                2510          2510            2510         2510         2510         2510          2510
NET WEIGHT              kg                4900          4910            5530         5640         6530         6790          7420
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,03           2,86          3,05         2,83         3,06          2,94         3,18
Standard capacity steps IPLV               4,46           4,21          4,48         4,16         4,51          4,32         4,67
Standard capacity steps EMPE               3,43           3,23          3,45         3,19         3,46          3,32         3,59




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                           -5-
R407C                                                                                          UNICO.SCREW.A.STD “M”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                    1160.V.2     1250.V.3         1345.V.3     1440.V.3     1540.V.3     1640.V.3      1740.V.3
SIZE                                       M19          M20               M21          M21          M22          M22           M23
COOLING CAPACITY (1)    kW                1035,5       1216,5            1327        1392,5       1481,9       1504,2        1565,3
COMPRESSORS (1)         n.                   2            3                3            3            3            3             3
Power input             kW                  332         424,1            442,1         477         477,7        491,4         490,1
Absorbed current        A                  555,2        711,9            740,9        798,6        799,2        821,9         819,8
Max absorbed current    A                   620          764              812          860          883          907           930
Starting current        A                   874          973             1016         1059         1111         1132          1153
FANS                    n.                  14           16                18           18           20           20            22
Air flow                m3/h              276500       316000           355500       355500       395000       395000        434500
Power input             kW                 19,6         22,4              25,2         25,2          28           28           30,8
Max absorbed current    A                  37,8         43,2              48,6         48,6          54           54           59,4
EVAPORATOR (1)          n.                   1            1                1            1            1            1             1
Water flow              m3/h               177,7        208,7            227,7        238,9        254,3        258,1         268,6
Pressure drops          kPa                45,7         77,8              92,5        101,9         82,6        85,1          92,1
Water content           l                   252          200              200          200          423          423           423
Max water flow          m3/h                200          220              220          220          280          280           280
GAS CIRCUITS            n.                   2            3                3            3            3            3             3
CAPACITY STEPS          n.                   6            6                6            6            6            6             6
DESUPERHEATER (2)
Heating capacity        kW                323,1        379,6             414         434,5         462,3        469,3        488,4
Water flow              m3/h              56,3         66,1              72,1         75,7          80,5         81,8        85,1
Pressure drops          kPa               33,3         23,7               27          28,4          31,5         31,9         33,9
Water content           l
Max water flow          m3/h                76            114            114          114           114          114          114
100% HEAT RECLAIM (2)
Heating capacity        kW               1401,8        1688,4          1813,6        1917,7       2006,7       2050,9        2094,7
Water flow              m3/h              249,5         295,5          323,1         341,6        357,3        365,1         372,9
Pressure drops          kPa               47,4          78,1            69,5           60          56,5         51,4          47,1
Water content           l
Max water flow          m3/h               310            300            345          390           415          440          465
DIMENSIONS
Lenght                  mm                8210          9560            10630        10630        11700         11700        12770
Width                   mm                2350          2350             2350         2350         2350          2350         2350
Height                  mm                2510          2510             2510         2510         2510          2510         2510
NET WEIGHT              kg                7440          8910             9350         9610        10370         10390        10900
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,12           2,87           3,00         2,92         3,10          3,06         3,19
Standard capacity steps IPLV               4,58           4,22           4,41         4,29         4,56          4,50         4,69
Standard capacity steps EMPE               3,52           3,24           3,39         3,30         3,51          3,46         3,61




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                           -6-
R407C                                                                                       UNICO.SCREW.A.STD “M”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.STD: Chiller in standard version.

MODEL                                   1825.V.4       1920.V.4        2020.V.4        2120.V.4       2220.V.4        2320.V.4
SIZE                                    M18+M18        M18+M18         M18+M19         M18+M19        M19+M19         M19+M19
COOLING CAPACITY (1)    kW               1802,2         1868,2          1939,2           1961          2031,4          2053,9
COMPRESSORS (1)         n.                  4              4               4               4              4               4
Power input             kW                602,6           638            635,5           649,2          648,4           661,7
Absorbed current        A                1009,5         1068,1          1063,2          1086,1         1084,5          1106,6
Max absorbed current    A                 1098           1146            1170            1193           1217            1240
Starting current        A                 1274           1317            1369            1390           1411            1432
FANS                    n.                 24              24             26               26             28             28
Air flow                m3/h             474000         474000          513500          513500         553000          553000
Power input             kW                33,6           33,6            36,4             36,4           39,2           39,2
Max absorbed current    A                 64,8           64,8            70,2             70,2           75,6           75,6
EVAPORATOR (1)          n.                  2              2               2               2              2               2
Water flow              m3/h              309,2          320,5           332,7           336,5          348,5           352,4
Pressure drops          kPa                60            64,5            75,9             77,7           91,4           93,5
Water content           l                  369            369             369             369            369             369
Max water flow          m3/h               400            400             380             380            360             360
GAS CIRCUITS            n.                  4              4               4               4              4               4
CAPACITY STEPS          n.                  8              8               8               8              8               8
DESUPERHEATER (2)
Heating capacity        kW                562,3           582,9           605            611,8           633,8          640,8
Water flow              m3/h              97,9            101,5          105,4           106,6           110,4          111,6
Pressure drops          kPa               27,7            28,8           30,5             30,8            32,5          32,8
Water content           l
Max water flow          m3/h               152             152            152             152             152            152
100% HEAT RECLAIM (2)
Heating capacity        kW               2468,5           2589,7         2641,5         2685,3          2739,1          2782,7
Water flow              m3/h              439,8           461,2           470,4         478,2           487,7            495,4
Pressure drops          kPa               67,6             61,5           57,1           53,1            49,9            46,8
Water content           l
Max water flow          m3/h               475             520            545             570             595            620
DIMENSIONS
Lenght                  mm                14330           14330          15400           15400          16470           16470
Width                   mm                 2350            2350          2350             2350          2350            2350
Height                  mm                 2510            2510          2510             2510          2510            2510
NET WEIGHT              kg                13320           13580          14090           14110          14780           14800
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                2,99            2,93           3,05            3,02           3,13            3,10
Standard capacity steps IPLV               4,40            4,30           4,49            4,44           4,61            4,56
Standard capacity steps EMPE               3,38            3,31           3,45            3,41           3,54            3,51




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                        -7-
R407C                                                                                           UNICO.SCREW.A.STD “M”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    580.V.2     660.V.2        715.V.2         770.V.2         865.V.2       960.V.2     1060.V.2
Sound pressure level
1m far                   dB(A)              88          88             88              88              88              88        88
5m far                   dB(A)             77,5        77,5           76,6            76,6            78,2            78,2      77,4
10m far                  dB(A)             71,6        71,6           70,8            70,8            72,5            72,5      71,8

MODEL                                    1160.V.2    1250.V.3       1345.V.3        1440.V.3        1540.V.3      1640.V.3    1740.V.3
Sound pressure level
1m far                   dB(A)              88          88             88              88              88              88        88
5m far                   dB(A)             77,4        78,7           78,2            78,2            78,2            78,2      78,2
10m far                  dB(A)             71,8        73,3           73,8            73,8            73,8            73,8      73,8

MODEL                                    1825.V.4      1920.V.4         2020.V.4             2120.V.4          2220.V.4      2320.V.4
Sound pressure level
1m far                   dB(A)              88            88                  88                88                88            88
5m far                   dB(A)             78,2          78,2                78,2              78,2              78,2          78,2
10m far                  dB(A)             73,8          73,8                73,8              73,8              73,8          73,8




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                    580.V.2     660.V.2        715.V.2         770.V.2         865.V.2       960.V.2     1060.V.2
Mean sound pressure level
1m far                    dB(A)             84          84            84              84                84              84      84

MODEL                                    1160.V.2    1250.V.3       1345.V.3        1440.V.3        1540.V.3      1640.V.3    1740.V.3
Mean sound pressure level
1m far                    dB(A)             84          84            84              84                84              84      84

MODEL                                    1825.V.4      1920.V.4         2020.V.4             2120.V.4          2220.V.4      2320.V.4
Mean sound pressure level
1m far                    dB(A)             85            85                 85                85                85            85




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                        -8-
R407C                                                                                           UNICO.SCREW.A.STD “M”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    580.V.2     660.V.2        715.V.2         770.V.2         865.V.2       960.V.2     1060.V.2
Sound pressure level
1m far                   dB(A)              76          76             76              76              76              76        76
5m far                   dB(A)             64,6        64,6           66,2            66,2            66,2            66,2      65,4
10m far                  dB(A)             58,8        58,8           60,5            60,5            60,5            60,5      59,8

MODEL                                    1160.V.2   1250.V.3        1345.V.3        1440.V.3        1540.V.3      1640.V.3    1740.V.3
Sound pressure level
1m far                   dB(A)              76          76             76              76              76              76        76
5m far                   dB(A)             65,4        66,7           66,2            66,2            66,2            66,2      66,2
10m far                  dB(A)             59,8        61,3           61,8            61,8            61,8            61,8      61,8

MODEL                                    1825.V.4      1920.V.4         2020.V.4             2120.V.4          2220.V.4      2320.V.4
Sound pressure level
1m far                   dB(A)              76            76                  76                76                76            76
5m far                   dB(A)             66,2          66,2                66,2              66,2              66,2          66,2
10m far                  dB(A)             61,8          61,8                61,8              61,8              61,8          61,8




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                    580.V.2     660.V.2        715.V.2         770.V.2         865.V.2       960.V.2     1060.V.2
Mean sound pressure level
1m far                    dB(A)            72          72             72              72                72              72      72

MODEL                                    1160.V.2   1250.V.3        1345.V.3        1440.V.3        1540.V.3      1640.V.3    1740.V.3
Mean sound pressure level
1m far                    dB(A)            72          72             72              72                72              72      72

MODEL                                    1825.V.4      1920.V.4         2020.V.4             2120.V.4          2220.V.4      2320.V.4
Mean sound pressure level
1m far                    dB(A)            73             73                 73                73                73            73




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                        -9-
R407C                                                                                      UNICO.SCREW.A.STD “M”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.STD. 580.V.2 unit:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 342,0 +
                        - Condenser fans (*)        A  21,6 +
                        Maximum electric absorption A 363,6


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                    - 10 -
R407C                                                                                         UNICO.SCREW.A.STD “M”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                        YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                         COM
                                                           B




                              SUCTION LINE                                 TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                         - 11 -
R407C                                                                                          UNICO.SCREW.A.STD “M”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                      - 12 -
R407C                                                                                    UNICO.SCREW.A.STD “M”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREW.A.STD.580.V.2 = 88 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 88-3 =85 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               M16      M17       M18       M19       M20      M21       M22       M23
                        Weight               kg    300      375       440       505       570      635       710       780

                        Chiller size              M18+M18               M18+M19                 M19+M19
                        Weight               kg     880                   945                     1010




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                    - 13 -
R407C                                                                                        UNICO.SCREW.A.STD “M”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_AM_GB407_0203                        - 14 -
R134a        UNICO.SCREW.A.FLX “U”
        Air cooled liquid chillers with Screw compressors and axial fans




                                               SCREW compressors
                                                    450÷ 900 kW




                                           RC GROUP
                                  TECHNICAL DOCUMENTATION
                                  UNCSRW_FLX_GB134_0405
R134a                                                                                      UNICO.SCREW.A.FLX “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        6°C      leaving water minimum temperature.
                        0°C      leaving water minimum temperature by adding antifreeze
                        -6°C     leaving water minimum temperature by adding antifreeze and BRINE kit type “A”
                        -10°C    leaving water minimum temperature by adding antifreeze and BRINE kit type “B”
                        20°C     inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        45°C      maximum value for unit in full load conditions.
                        55°C      maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        30÷50°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R134a refrigerant charge.
                        For different working conditions and/or other refrigerants, please check the limit operating conditions
                        of the specific model with the electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI and AMP, are designed and produced with materials and components suitable to be exposed
                        to temperatures of -40÷45°C without any damage to the material structure nor to the components
                        and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                     -2-
R134a                                                                                    UNICO.SCREW.A.FLX “U”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.FLX: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with stainless steel frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 capacity control steps for each compressor.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Part-Winding starting system (model 450.V2).
                        • Star/Delta starting system (from model 545.V2 up yo model 895.V2).
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +45°C.
                          - Partial load (if scheduled) with outdoor temperature up to +55°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - R134a refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                    -3-
R134a                                                                                     UNICO.SCREW.A.FLX “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.FLX: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +45°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +55°C. Over this limit a safety
                               device stop the unit.
                        • LNO kit with INVERTER:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Proportional condensing control system with condenser fans driven by INVERTER, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +45°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +55°C. Over this limit a safety
                               device stop the unit.
                        • Kit BRINE type “A” for low temperature with leaving water temperature up to -6°C. The kit includes:
                          - working parameters set.
                          With kit Brine “A” the proportional condenensing control system is compulsory (with electronic
                          regulators or Inverter).
                        • Kit BRINE type “B” for low temperature with leaving water temperature up to -10°C. The kit
                          includes:
                          - working parameters set.
                          - 20mm thick evaporator insulation.
                          - Special type evaporator for low temperature.
                          - Special type Eprom for low temperature.
                          With kit Brine “B” the proportional condenensing control system is compulsory (with electronic
                          regulators or Inverter).
                        • Noise absorption plenum on fans air discharge.
                        • Spring antivibration holders kit (not installed).
                        • Rubber holders kit (not installed).
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Proportional condensing control system with continuous variation of the condenser fans speed
                          through electronic regulators directly driven by the proportional signal managed by MP99
                          microprocessor control, allowing the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +45°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +55°C. Over this limit a safety
                               device stop the unit.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                    -4-
R134a                                                                                     UNICO.SCREW.A.FLX “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        • Proportional condensing control system with condenser fans driven by INVERTER. allowing the
                          following operating conditions:
                             ◊ Full load with outdoor temperature from -15 to +34/38°C.
                             ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +45°C.
                             ◊ Partial load (if scheduled) with outdoor temperature up to +55°C. Over this limit a safety
                               device stop the unit.
                        • SQL or ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - STD units: PU pumping group with 2 poles water pumps.
                          - STD + kit LNO units: PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                    -5-
R134a                                                                                        UNICO.SCREW.A.FLX “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.FLX: Chiller in standard version.

MODEL                                      450.V2         545.V2        620.V2          700.V2         780.V2          895.V2
SIZE                                         U9              U9           U10             U10            U11             U11
COOLING CAPACITY (1)       kW               451,9          548,3         642,2           714,4          787,3           901,4
COMPRESSORS (1)            n.                 2               2            2               2              2               2
Power input                kW               166,6          225,2         260,2           294,2          303,6            366
Absorbed current           A                276,2          366,8         405,9           466,8          471,3           567,3
Max absorbed current       A                 372            454           544             606            654             786
Starting current           A                 812            576           696             797            863            1004
FANS                       n.                 6               6            8               8             10               10
Air flow                   m3/h            130000         123800        172500          165000         215000          206300
Power input                kW                5,6             5,6         11,2             11,2            14              14
Max absorbed current       A                10,8            10,8         21,6             21,6            27              27
EVAPORATOR (1)             n.                 1               1            1               1              1               1
Water flow                 m3/h             77,7            94,3         110,4           118,2          135,3            155
Pressure drops             kPa              37,2            37,8         51,9             68,4            36             47,6
Water content              l                 162            184           184             222            252             383
Max water flow             m3/h              95             113           113            118,2          156,2           166,4
GAS CIRCUITS               n.                 2               2            2               2              2               2
CAPACITY STEPS             n.                 6               6            6               6              6               6
DESUPERHEATER (2)
Heating capacity           kW                89,9          109,1         127,8           142,2          156,7           179,4
Water flow                 m3/h              15,7           19           22,3            24,8           27,3            31,2
Pressure drops             kPa               12,2           9,3           10               10           10,1            11,3
Max water flow             m3/h              23,1          32,2          36,8             41,4           46             50,6
100% HEAT RECLAIM (2)
Heating capacity           kW               624,6          774,3         900,1          1021,2          1107,2         1271,9
Water flow                 m3/h             61,5             61          74,5            90,7            107           106,4
Pressure drops             kPa              44,3           43,5          43,8             44             44,2           43,7
Max water flow             m3/h             63,8            63,8         77,8            94,4            111            111
PUMPING GROUP
1 pump group                PU                5/1           6/1            6/1              6/1           7/1            8/1
1 pump group                PU-LN             5/1           6/1            6/1              6/1           7/1            8/1
2 pumps group               PU                5/2           6/2            6/2              6/2           7/2            8/2
2 pumps group               PU-LN             5/2           6/2            6/2              6/2           7/2            8/2
DIMENSIONS
Lenght                     mm                4510          4510           5500           5500            6490           6490
Width                      mm                2130          2130           2130           2130            2130           2130
Height                     mm                2430          2430           2430           2430            2430           2430
NET WEIGHT                 kg                4588          4708           5680           5780            6393           7341
ENERGY EFFICIENCY INDEX
                           COP               2,63          2,38           2,38              2,35         2,49           2,38
                           IPLV              4,11          3,72           3,71              3,66         3,88           3,71




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                     -6-
R134a                                                                                      UNICO.SCREW.A.FLX “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.FLX: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                       450.V2        545.V2         620.V2          700.V2         780.V2          895.V2
Sound pressure level
1m far                   dB(A)                 79           79              80             80              80             80



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                       450.V2        545.V2         620.V2          700.V2         780.V2          895.V2
Mean sound pressure level
1m far                    dB(A)                75            75             76             76              76             76
5m far                    dB(A)               67,4          67,4           68,7           68,7            68,9           68,9
10m far                   dB(A)               62,7          62,7            64             64             64,3           64,3




                         UNICO.SCREW.A.FLX: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                       450.V2        545.V2         620.V2          700.V2         780.V2          895.V2
Sound pressure level
1m far                   dB(A)                72,8          72,8           73,8           73,8            73,8           73,8



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                       450.V2        545.V2         620.V2          700.V2         780.V2          895.V2
Mean sound pressure level
1m far                    dB(A)               68,8          68,8           69,8           69,8            69,8           69,8
5m far                    dB(A)               61,2          61,2           62,5           62,5            62,7           62,7
10m far                   dB(A)               56,5          56,5           57,8           57,8            58,1           58,1




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                    -7-
R134a                                                                                     UNICO.SCREW.A.FLX “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.FLX. 450.V2 unit with PU 5/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 372,0 +
                        - Condenser fans (*)        A  10,8 +
                        - Water pump (*)            A  12,0 =
                        Maximum electric absorption A 394,8


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                   Coefficient
                                 230.3.50                         1,73
                                 415.3.50                         0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                   -8-
R134a                                                                                                   UNICO.SCREW.A.FLX “U”
                                                                             Air cooled liquid chillers with Screw compressors and axial fans

                         OPTIONAL

                         CHILLED WATER TANKS
                         This optional is made by an insulated horizontal water tank supplied assembled inside the unit, with
                         antifreeze electric heater and ready to work. The tank does not modify the water chiller overall
                         dimensions.


Capacity                       l                          2.500                                            3.000
Connections                    Ø                                            See the chiller drawing
Air discharge                  Ø MPT                      1/2"                                             1/2"
Water drain                    Ø MPT                      1/2"                                             1/2"
Empty weight                   kg                         264                                               322
Dimensions                     A mm                       730                                              730
                               B mm                       1110                                             1110
                               C mm                       1600                                             1600




MODEL                                         450.V2         545.V2                620.V2             700.V2           780.V2            895.V2
Capacity                       l               -- --         2500                  2500               2500             3000              3000




CHILLED WATER TANK




                                                                                                                            2a




                                                                                                                            1
                                                                                                                                         C




                                                                                                                            2
                                                                                                                                     B
                                                                                                                                 A




                  1065                 1065                             3                                          4



                         1.    Water inlet.
                         2.    Water outlet.
                         2a.   Water outlet with pumping group.
                         3.    Air discharge.
                         4.    Water drain.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                           -9-
R134a                                                                                           UNICO.SCREW.A.FLX “U”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                        YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                          COM
                                                           B




                              SUCTION LINE                                 TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                        - 10 -
R134a                                                                                            UNICO.SCREW.A.FLX “U”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                     - 11 -
R134a                                                                                                 UNICO.SCREW.A.FLX “U”
                                                                           Air cooled liquid chillers with Screw compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            SINGLE PUMP VERSION - PU.../1 • PU-LN.../1
                            Pumping group with one centrifugal pump that include:
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Water safety flow switch.
                            - Water pressure gauge.

                            TWO PUMPS VERSION - PU.../2 • PU-LN.../2
                            Pumping group with two centrifugal pumps that include:
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch.
                            - Water pressure gauges.
                            One pump is working and the other is in stand-by. Automatic changeover in case of failure.

                                            2 POLES                                             4 POLES
1 pump version                   PU5/1 PU6/1 PU7/1 PU8/1 PU9/1                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
2 pumps version                  PU5/2 PU6/2 PU7/2 PU8/2 PU9/2                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
Min. water flow             m3/h 37,8    75     75   75   108                   37,8      75        75      75      108
Max water flow              m3/h  84    150    168  180   240                    84      132       168     180      210
Total pressure
With min. water flow        kPa     220     200     275     340     300          205           215        262        312           293
With max. water flow        kPa     155     130     160     180     190          171           127        159        198            140
Installed power (1)         kW      5,5     7,5      11      15     18,5          5,5          7,5         11         15             15
Plate current (1)           A       12      16      22,5     30     35,1         12,5          16         21,8       28,5          28,5
Net weight ../1             kg      270     320     370     390     450          360           390        540        560           600
Net weight ../2             kg      450     520     610     650     750          600           650        890        930           1000
Sound pressure level (2)    dB(A)    78      78      82      82      82           69            69         74         74             74
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME

                                      PU.../1                                                        PU.../2
                       VE                                                         VE
                MA            YS                             MA             MA           YS                              MA




                                                   FL                                                                         FL
                                        P                                                            P
                                                                                          RU              YR        RU



                            MA Manometer                                                             P
                                                                                          RU              YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch


RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                           - 12 -
R134a                                                                                      UNICO.SCREW.A.FLX “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREWA.FLX.450.V2 = 79 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 79-3 =76 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               U9                      U10                      U11
                        Weight               kg    280                     310                      375




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                   - 13 -
R134a                                                                                          UNICO.SCREW.A.FLX “U”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_FLX_GB134_0405                       - 14 -
R134a       UNICO.SCREW.A.XTR “U”
        Air cooled liquid chillers with Screw compressors and axial fans




                                               SCREW compressors
                                                   460 ÷ 1215 kW




                                           RC GROUP
                                  TECHNICAL DOCUMENTATION
                                  UNCSRW_XTR_GB134_0405
R134a                                                                                      UNICO.SCREW.A.XTR “U”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        6°C      leaving water minimum temperature.
                        0°C      leaving water minimum temperature by adding antifreeze
                        -6°C     leaving water minimum temperature by adding antifreeze and BRINE kit type “A”
                        -10°C    leaving water minimum temperature by adding antifreeze and BRINE kit type “B”
                        20°C     inlet water maximum temperature.

                        Outdoor air temperature:
                        -15°C     minimum value.
                        37/40°C maximum value for unit in full load conditions.
                        47°C      maximum value for unit in full load conditions and condenser fans at maximum speed
                        56°C      maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        30÷50°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R134a refrigerant charge.
                        For different working conditions and/or other refrigerants, please check the limit operating conditions
                        of the specific model with the electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI and AMP, are designed and produced with materials and components suitable to be exposed
                        to temperatures of -40÷45°C without any damage to the material structure nor to the components
                        and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                     -2-
R134a                                                                                    UNICO.SCREW.A.XTR “U”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.XTR: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with stainless steel frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 additional control steps for each compressor on unit V2.
                        • 2 additional control steps for each compressor on unit V3.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Thermostat with sensor on gas discharge for lubricant oil cooling system control.
                        • Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Part Winding starting system (model 460.V2).
                        • Star/Delta starting system (from model 580.V2 up to model 1200.V3).
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +47°C.
                          - Partial load with outdoor temperature up to +56°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - R134a refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (fuses for nominal absorption higher than 44A)
                          - Auxiliary circuit and microprocessor feeding by transformer.

RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                    -3-
R134a                                                                                     UNICO.SCREW.A.XTR “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.XTR: Chiller in extremely low noise version.

                        OPTIONAL
                        • Kit BRINE type “A” for low temperature with leaving water temperature up to -6°C. The kit includes:
                          - working parameters set.
                        • Kit BRINE type “B” for low temperature with leaving water temperature up to -10°C. The kit
                          includes:
                          - working parameters set.
                          - 20mm thick evaporator insulation.
                          - Special type evaporator for low temperature.
                          - Special type Eprom for low temperature.
                        • Noise absorption plenum on fans air discharge.
                        • Spring antivibration holders kit (not installed).
                        • Rubber holders kit (not installed).
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Proportional condensing control system with condenser fans driven by INVERTER allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +47°C.
                          - Partial load with outdoor temperature up to +56°C.
                             Over this limit a safety device stop the unit.
                        • SQL or ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" "N+O" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                    -4-
R134a                                                                                          UNICO.SCREW.A.XTR “U”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.XTR: Chiller in extremely low noise version.

MODEL                                  460.V2     580.V2     630.V2       730.V2      820.V2      950.V2     1100.V3     1200.V3
SIZE                                     U9         U10        U10          U11         U12         U12      U14/13      U14/13
COOLING CAPACITY (1)       kW           462,3      590,1      663,9        751,7       836,6       962,9      1137,6      1215,4
COMPRESSORS (1)            n.             2          2          2            2           2           2          2           2
Power input                kW           162,3      207,1      250,3        277,5       282,3       339,5      414,3       445,9
Absorbed current           A            269,8      340,8       391         442,7       438,7        524       661,2       688,7
Max absorbed current       A             372        454        544          606         654         786        909         981
Starting current           A             812        576        696          797         863        1004        1069        1158
FANS                       n.             6          8          8            10          12          12         14          14
Air flow                   m3/h        97500      138000     132000       172500      207000      198000     231000      244000
Power input                kW            5,6        11,2       11,2          14         16,8        16,8       19,6        19,6
Max absorbed current       A            10,8        21,6       21,6          27         32,4        32,4       37,8        37,8
EVAPORATOR (1)             n.             1          1          1            1           1           1          1           1
Water flow                 m3/h         79,5       101,5       113         118,2       143,8       165,5      179,3       208,9
Pressure drops             kPa          38,9       43,8       54,4          68,4        40,7        54,3       79,2        53,6
Water content              l             162        184        184          222         252         383        423         406
Max water flow             m3/h           95        113        113         118,2       156,2       166,4      179,3        230
GAS CIRCUITS               n.             2          2          2            2           2           2          2           2
CAPACITY STEPS             n.             6          6          6            6           6           6          6           6
DESUPERHEATER (2)
Heating capacity           kW              92      117,4      132,1        149,6       166,5       191,6      226,4       241,9
Water flow                 m3/h            16      20,5         23         26,1         29         33,4       39,4        42,1
Pressure drops             kPa            12,8      10,8       10,7         11,1       11,4        12,9       11,3        10,7
Max water flow             m3/h           23,1      32,2       36,8         41,4        46          50,6       62,1        69
100% HEAT RECLAIM (2)
Heating capacity           kW           624,6      774,3      900,1       1021,2      1107,2      1271,9      1536        1633,9
Water flow                 m3/h         61,5        61        74,5         90,7        107        106,4        136        135,7
Pressure drops             kPa          44,3       43,5       43,8          44         44,2        43,7         44         43,8
Max water flow             m3/h         63,8       63,8       77,8         94,4        111         111        141,6       141,6
PUMPING GROUP
1 pump group                PU-LN         5/1       6/1        6/1          6/1         7/1         8/1         9/1         9/1
2 pumps group               PU-LN         5/2       6/2        6/2          6/2         7/2         8/2         9/2         9/2
DIMENSIONS
Lenght                     mm           4510       5500       5500         6490        7480        7480        9460        9460
Width                      mm           2130       2130       2130         2130        2130        2130        2130        2130
Height                     mm           2430       2430       2430         2430        2430        2430        2430        2430
NET WEIGHT                 kg           4588       5180       5680         6278        6925        7873        8935        9135
ENERGY EFFICIENCY INDEX
                           COP            2,76      2,72      2,55          2,59       2,81        2,72        2,63        2,62
                           IPLV           4,31      4,24      3,98          4,04       4,39        4,24        3,95        3,93




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                     -5-
R134a                                                                                           UNICO.SCREW.A.XTR “U”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.XTR: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                   460.V2     580.V2    630.V2          730.V2      820.V2      950.V2     1100.V3     1200.V3
Sound pressure level
1m far                   dB(A)            67         67           67           68          68          68          69          69




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                   460.V2     580.V2    630.V2          730.V2      820.V2      950.V2     1100.V2     1200.V2
Mean sound pressure level
1m far                    dB(A)            63        63            63          64          64          64          65          65
5m far                    dB(A)           55,4      55,7          55,7        56,9        57,1        57,1        58,4        58,4
10m far                   dB(A)           50,7       51            51         52,3        52,6        52,6         54          54




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                     -6-
R134a                                                                                     UNICO.SCREW.A.XTR “U”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.XTR. 460.V2 unit with PU/LN 5/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 372,0 +
                        - Condenser fans (*)        A  10,8 +
                        - Water pump (*)            A  12,0 =
                        Maximum electric absorption A 394,8


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                   Coefficient
                                 230.3.50                         1,73
                                 415.3.50                         0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                   -7-
R134a                                                                                                 UNICO.SCREW.A.XTR “U”
                                                                            Air cooled liquid chillers with Screw compressors and axial fans

                         OPTIONAL

                         CHILLED WATER TANKS
                         This optional is made by an insulated horizontal water tank supplied assembled inside the unit, with
                         antifreeze electric heater and ready to work. The tank does not modify the water chiller overall
                         dimensions.


Capacity                       l                           2.500                                            3.000
Connections                    Ø                                            See the chiller drawing
Air discharge                  Ø MPT                       1/2"                                             1/2"
Water drain                    Ø MPT                       1/2"                                             1/2"
Empty weight                   kg                           264                                              322
Dimensions                     A mm                        730                                              730
                               B mm                        1110                                             1110
                               C mm                        1600                                             1600




MODEL                                         460.V2   580.V2      630.V2        730.V2      820.V2      950.V2     1100.V3         1200.V3
Capacity                       l               -- --    2500        2500          3000        3000        3000       3000            3000




CHILLED WATER TANK




                                                                                                                       2a




                                                                                                                       1
                                                                                                                                    C




                                                                                                                       2
                                                                                                                                B
                                                                                                                            A




                  1065                 1065                             3                                     4



                         1.    Water inlet.
                         2.    Water outlet.
                         2a.   Water outlet with pumping group.
                         3.    Air discharge.
                         4.    Water drain.




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                           -8-
R134a                                                                                        UNICO.SCREW.A.XTR “U”
                                                                     Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                     YR
                                                    SC




                                                     A
                                      RU

                                                                               YR
                                          COM
                                                           B




                              SUCTION LINE                              TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                        -9-
R134a                                                                                            UNICO.SCREW.A.XTR “U”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                     - 10 -
R134a                                                                                                UNICO.SCREW.A.XTR “U”
                                                                           Air cooled liquid chillers with Screw compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            SINGLE PUMP VERSION - PU.../1 • PU-LN.../1
                            Pumping group with one centrifugal pump that include:
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Water safety flow switch.
                            - Water pressure gauge.

                            TWO PUMPS VERSION - PU.../2 • PU-LN.../2
                            Pumping group with two centrifugal pumps that include:
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch.
                            - Water pressure gauges.
                            One pump is working and the other is in stand-by. Automatic changeover in case of failure.

                                            2 POLES                                             4 POLES
1 pump version                   PU5/1 PU6/1 PU7/1 PU8/1 PU9/1                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
2 pumps version                  PU5/2 PU6/2 PU7/2 PU8/2 PU9/2                PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
Min. water flow             m3/h 37,8    75     75   75   108                   37,8      75        75      75      108
Max water flow              m3/h  84    150    168  180   240                    84      132       168     180      210
Total pressure
With min. water flow        kPa     220     200     275     340     300          205           215        262        312           293
With max. water flow        kPa     155     130     160     180     190          171           127        159        198            140
Installed power (1)         kW      5,5     7,5      11      15     18,5          5,5          7,5         11         15             15
Plate current (1)           A       12      16      22,5     30     35,1         12,5          16         21,8       28,5          28,5
Net weight ../1             kg      270     320     370     390     450          360           390        540        560           600
Net weight ../2             kg      450     520     610     650     750          600           650        890        930           1000
Sound pressure level (2)    dB(A)    78      78      82      82      82           69            69         74         74             74
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.

PUMPING GROUP SCHEME

                                      PU.../1                                                        PU.../2
                       VE                                                         VE
                MA            YS                             MA             MA           YS                              MA




                                                   FL                                                                         FL
                                        P                                                            P
                                                                                          RU              YR        RU



                            MA Manometer                                                             P
                                                                                          RU              YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch


RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                           - 11 -
R134a                                                                                       UNICO.SCREW.A.XTR “U”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREWA.XTR.460.V2 = 67 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 67-3 =64 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               U9              U10         U11           U12         U14/13
                        Weight               kg    280             310         375           440          570




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                   - 12 -
R134a                                                                                          UNICO.SCREW.A.XTR “U”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_XTR_GB134_0405                       - 13 -
R134a      UNICO.SCREW.A.HEF “M”
        Air cooled liquid chillers with Screw compressors and axial fans




                                               SCREW compressors
                                                   445 ÷ 1595 kW




                                           RC GROUP
                                  TECHNICAL DOCUMENTATION
                                  UNCSRW_HEF_GB134_0405
R134a                                                                                     UNICO.SCREW.A.HEF “M”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        6°C      leaving water minimum temperature.
                        0°C      leaving water minimum temperature by adding antifreeze.
                        -6°C     leaving water minimum temperature by adding antifreeze and BRINE kit type “A”.
                        -10°C    leaving water minimum temperature by adding antifreeze and BRINE kit type “B”.
                        20°C     inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        52°C      maximum value for unit in full load conditions.
                        60°C      maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        30÷50°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R134a refrigerant charge.
                        For different working conditions and/or other refrigerants, please check the limit operating conditions
                        of the specific model with the electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI and AMP, are designed and produced with materials and components suitable to be exposed
                        to temperatures of -40÷45°C without any damage to the material structure nor to the components
                        and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                     -2-
R134a                                                                                   UNICO.SCREW.A.HEF “M”
                                                                 Air cooled liquid chillers with Screw compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.SCREW.A.HEF: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel profiles.
                        • Internal supporting frame made of galvanized steel profiles.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with stainless steel frame.
                        • Screw semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • 3 additional control steps for each compressor on unit V2.
                        • 2 additional control steps for each compressor on unit V3 - V4.
                        • Thermostat on gas discharge with safety limit functions for high temperature.
                        • Oil separator on discharge gas.
                        • Low oil level protection system.
                        • Part-Winding starting system (for models 450.V2 and 500.V2).
                        • Star/Delta starting system (from model 580.V2 up to model 1580.V4).
                        • Non return valve on compressor discharge.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +52°C.
                          - Partial load (if scheduled) with outdoor temperature up to +60°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure.
                          - Pump-down stop system.
                          - R134a refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                   -3-
R134a                                                                                    UNICO.SCREW.A.HEF “M”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        UNICO.SCREW.A.HEF: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Sound absorption box, with special deadening material, for each compressor.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +52°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +60°C. Over this limit a safety
                               device stop the unit.
                        • LNO kit with INVERTER:
                          - Sound absorption box, with special deadening material, for each compressor.
                          - Proportional condensing control system with condenser fans driven by INVERTER, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +52°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +60°C. Over this limit a safety
                               device stop the unit.
                        • Kit BRINE type “A” for low temperature with leaving water temperature up to -6°C. The kit includes:
                          - working parameters set.
                          With kit Brine “A” the proportional condenensing control system is compulsory (with electronic
                          regulators or Inverter).
                        • Kit BRINE type “B” for low temperature with leaving water temperature up to -10°C. The kit
                          includes:
                          - working parameters set.
                          - Thermostat with sensor on compressor gas discharge for lubricant oil cooling system control.
                          - Lubricant oil cooling system by liquid refrigerant injection driven by solenoid valves.
                          - 20mm thick evaporator insulation.
                          - Special type evaporator for low temperature.
                          - Special type Eprom for low temperature.
                          With kit Brine “B” the proportional condenensing control system is compulsory (with electronic
                          regulators or Inverter).
                        • Noise absorption plenum on fans air discharge.
                        • Spring antivibration holders kit (not installed).
                        • Rubber holders kit (not installed).
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control, allowing the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +52°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +60°C. Over this limit a safety
                               device stop the unit.




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                    -4-
R134a                                                                                    UNICO.SCREW.A.HEF “M”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        • Proportional condensing control system with condenser fans driven by INVERTER, allowing the
                          following operating conditions:
                             ◊ Full load with outdoor temperature from -15 to +34/38°C.
                             ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +52°C.
                             ◊ Partial load (if scheduled) with outdoor temperature up to +60°C. Over this limit a safety
                               device stop the unit.
                        • SQL or ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Electri box cooling system
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" "N+O" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                    -5-
R134a                                                                                          UNICO.SCREW.A.HEF “M”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.HEF: Chiller in standard version.

MODEL                                     450.V2     500.V2            580.V2      630.V2        680.V2       790.V2       860.V2
SIZE                                       M15        M15                M16         M16           M16          M17          M18
COOLING CAPACITY (1)       kW              445,1      508,4             585,3       644,4         699,9        783,7        870,7
COMPRESSORS (1)            n.                2           2                2           2             2            2            2
Power input                kW               130        154              166,9       198,7         214,9        222,5        251,2
Absorbed current           A               235,9      257,6             283,1       328,3         344,9        348,7        407,8
Max absorbed current       A                297        331               367         414           207          237          474
Starting current           A                629        794               526         547           361          372          585
FANS                       n.                6           6                8           8             8            10           12
Air flow                   m3/h           118500     117000            158000      158000        156000       195000       237000
Power input                kW               5,6        5,6               11,2        11,2          11,2          14          16,8
Max absorbed current       A               10,8       10,8               21,6        21,6          21,6          27          32,4
EVAPORATOR (1)             n.                1           1                1           1             1            1            1
Water flow                 m3/h            76,5       87,4              100,6       110,8         118,2        134,7        149,7
Pressure drops             kPa             36,1       47,1               43,1        52,2          68,4         35,7         44,1
Water content              l                162        162               184         184           222          252          252
Max water flow             m3/h             95          95               113         113          118,2        156,2        156,2
GAS CIRCUITS               n.                2           2                2           2             2            2            2
CAPACITY STEPS             n.                6           6                6           6             6            6            6
DESUPERHEATER (2)
Heating capacity           kW              88,6       101,2            116,5        128,2         139,3         156         173,3
Water flow                 m3/h            15,4       17,6             20,3         22,3          24,3          27,2        30,2
Pressure drops             kPa             18,6       15,5             14,3         12,9          13,4          14,9        14,8
Max water flow             m3/h            18,5       23,1             27,7         32,2          34,5          36,8        41,4
100% HEAT RECLAIM (2)
Heating capacity           kW               --             --            --           --            --           --         1139,6
Water flow                 m3/h             --             --            --           --            --           --         173,6
Pressure drops             kPa              --             --            --           --            --           --          36,8
Max water flow             m3/h             --             --            --           --            --           --         177,8
DIMENSIONS
Lenght                     mm             3930        3930             5000          5000         5000         6070          7420
Width                      mm             2350        2350             2350          2350         2350         2350          2350
Height                     mm             2510        2510             2510          2510         2510         2510          2510
NET WEIGHT                 kg             4770        4970             5550          5570         5650         6755          7295
ENERGY EFFICIENCY INDEX
                           COP             3,30           3,20          3,31         3,09         3,11          3,33         3,27
                           IPLV            5,14           4,99          5,16         4,81         4,85          5,20         5,10




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                          -6-
R134a                                                                                          UNICO.SCREW.A.HEF “M”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        TECHNICAL DATA

                        UNICO.SCREW.A.HEF: Chiller in standard version.

MODEL                                     930.V2     1000.V2           1160.V3     1260.V3      1360.V3       1480.V3      1580.V4
SIZE                                       M18         M18               M19         M19          M20           M21          M22
COOLING CAPACITY (1)       kW              916,5      1028,8            1149,8      1265,8       1378,9        1544,9       1595,9
COMPRESSORS (1)            n.                2           2                 3          3             3            3            4
Power input                kW              271,7       316,4            339,3       397,8        411,2          475         496,9
Absorbed current           A               421,8        491             531,4       642,6         639,1         737          791
Max absorbed current       A                539         568               694        711           809          852          1041
Starting current           A                694         780               962        799           936          1035         1275
FANS                       n.               12          12                 14         14            16           18           20
Air flow                   m3/h           237000     234000            273000      273000       312000        351000       395000
Power input                kW              16,8        16,8              19,6        19,6         22,4          25,2          28
Max absorbed current       A               32,4        32,4              37,8        37,8         43,2          48,6          54
EVAPORATOR (1)             n.                1           1                 1          1             1            1            1
Water flow                 m3/h            157,6       168,5            179,3       217,6          232         265,6        274,4
Pressure drops             kPa             54,8        63,2              79,2        58,1         79,5          71,9          37
Water content              l                295         462               423        406           475          483          504
Max water flow             m3/h            166,4       168,5             179,3       230           232          273         312,4
GAS CIRCUITS               n.                2           2                 3          3             3            3            4
CAPACITY STEPS             n.                6           6                 6          6             6            6            8
DESUPERHEATER (2)
Heating capacity           kW             182,4       204,7             228,8       251,9         274,4        307,4        317,6
Water flow                 m3/h           31,8        35,7              39,9         43,9          47,8         53,6         55,3
Pressure drops             kPa            13,7        14,7              14,2         13,9          13,8         14,8         13,8
Max water flow             m3/h            46         50,6               55,2        62,1           69           76          78,2
100% HEAT RECLAIM (2)
Heating capacity           kW             1215,2     1377,8            1512,6       1721,4       1835,3       2069,3        2159,5
Water flow                 m3/h            193,5      220,8            235,9        260,5        290,3        331,2         330,4
Pressure drops             kPa             49,4       36,2              36,6         36,8         49,4         36,2          36,6
Max water flow             m3/h             198        226             241,5        266,7         297          339          338,8
DIMENSIONS
Lenght                     mm             7420        7420              8490         8490         9560         10630        11700
Width                      mm             2350        2350              2350         2350         2350          2350         2350
Height                     mm             2510        2510              2510         2510         2510          2510         2510
NET WEIGHT                 kg             7440        8450              9250         9450        10225         12085        12160
ENERGY EFFICIENCY INDEX
                           COP             3,20           3,10          3,22         3,05         3,20          3,10         3,06
                           IPLV            4,98           4,84          4,83         4,57         4,79          4,66         4,77




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                          -7-
R134a                                                                                      UNICO.SCREW.A.HEF “M”
                                                                    Air cooled liquid chillers with Screw compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.SCREW.A.HEF: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                     450.V2     500.V2         580.V2      630.V2        680.V2       790.V2       860.V2
Sound pressure level
1m far                   dB(A)              84          84            85           85           85           85            87

MODEL                                     930.V2     1000.V2        1160.V3     1260.V3      1360.V3      1480.V3       1580.V4
Sound pressure level
1m far                   dB(A)              87          87            88           88           88           88            88

                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                     450.V2     500.V2         580.V2      630.V2        680.V2       790.V2       860.V2
Mean sound pressure level
1m far                    dB(A)             81          81            82           82           82            82           84
5m far                    dB(A)            73,4        73,4          74,7         74,7         74,7          74,9         77,2
10m far                   dB(A)            68,6        68,6           70           70           70           70,3         72,7

MODEL                                     930.V2     1000.V2        1160.V3     1260.V3      1360.V3      1480.V3       1580.V4
Mean sound pressure level
1m far                    dB(A)             84          84            84           84           84            84           84
5m far                    dB(A)            77,2        77,2          77,4         77,4         77,5          77,7         77,8
10m far                   dB(A)            72,7        72,7          72,9         72,9         73,2          73,4         73,6




                         UNICO.SCREW.A.HEF: Chiller in standard version with LNO kit

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                     450.V2     500.V2         580.V2      630.V2        680.V2       790.V2       860.V2
Sound pressure level
1m far                   dB(A)              72          72            73           73           73           73            72

MODEL                                     930.V2     1000.V2        1160.V3     1260.V3      1360.V3      1480.V3       1580.V4
Sound pressure level
1m far                   dB(A)              75          75            76           76           76           76            76


                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.
MODEL                                     450.V2     500.V2         580.V2      630.V2        680.V2       790.V2       860.V2
Mean sound pressure level
1m far                    dB(A)             69          69            70           70           70            70           72
5m far                    dB(A)            61,4        61,4          62,7         62,7         62,7          62,9         65,2
10m far                   dB(A)            56,6        56,6           58           58           58           58,3         60,7

MODEL                                     930.V2     1000.V2        1160.V3     1260.V3      1360.V3      1480.V3       1580.V4
Mean sound pressure level
1m far                    dB(A)             72          72            72           72           72            72           72
5m far                    dB(A)            65,2        65,2          65,4         65,4         65,5          65,7         65,8
10m far                   dB(A)            60,7        60,7          60,9         60,9         61,2          61,4         61,6




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.

RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                       -8-
R134a                                                                                    UNICO.SCREW.A.HEF “M”
                                                                  Air cooled liquid chillers with Screw compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.SCREW.A.HEF. 450.V2 unit:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 297,0 +
                        - Condenser fans (*)        A  10,8 =
                        Maximum electric absorption A 307,8


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                   Coefficient
                                 230.3.50                         1,73
                                 415.3.50                         0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                   -9-
R134a                                                                                          UNICO.SCREW.A.HEF “M”
                                                                        Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                        YR
                                                    SC




                                                     A
                                      RU

                                                                                  YR
                                          COM
                                                           B




                              SUCTION LINE                                 TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                        - 10 -
R134a                                                                                           UNICO.SCREW.A.HEF “M”
                                                                         Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                                B



                                             COM




                                 SUCTION LINE                                       TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                     - 11 -
R134a                                                                                     UNICO.SCREW.A.HEF “M”
                                                                   Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.SCREW.A.HEF.450.V2 = 84 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 84-3 =81 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               M15      M16       M17       M18       M19      M20       M21       M22
                        Weight               kg    360      360       440       460       505      570       635       700




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                   - 12 -
R134a                                                                                         UNICO.SCREW.A.HEF “M”
                                                                       Air cooled liquid chillers with Screw compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                   R...                            G...
                                           Light                                 Medium                           Heavy
AxB                     mm                 Ø124                                  114x174                         208x208
C                       mm                  90                                     90                              122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCSRW_HEF_GB134_0405                       - 13 -
R407C                      UNICO.A.STD/ELN “G”
        Air cooled liquid chillers with reciprocating compressors and axial fans




                                              RECIPROCATING compressors
                                                          137 ÷ 392 kW




                                                   RC GROUP
                                         TECHNICAL DOCUMENTATION
                                         UNCRCP_AG_GB407_0203
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     -2-
R407C                                                                                          UNICO.A.STD/ELN “G”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Rubber holders for compressor.
                        • Part-Winding starting system for compressors - "S.2" units version.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                            oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • Part-Winding starting system for compressors - "S.2" units version.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     -3-
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        UNICO.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Part-Winding starting system for compressors - "F.2" units version.
                        • Compressor thermal protection relay for compressors - "S.2" units version.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     -4-
R407C                                                                                               UNICO.A.STD/ELN “G”
                                                                Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                    142.F.2       188.F.2        220.F.2       260.F.2       300.F.2       385.S.2       440.S.2
SIZE                                        G7            G7             G8            G8            G8            G9            G9
COOLING CAPACITY (1)    kW                137,3         169,4           202          242,6         269,8         356,1         392,6
COMPRESSORS (1)         n.                   2             2              2             2             2            2              2
Power input             kW                 43,6          57,5           68,5          78,4          99,6         108,1         124,6
Absorbed current        A                  72,6          98,5          122,2         141,7         178,2         183,8         209,7
Max absorbed current    A                   96           131            133           177           214           209           242
Starting current        A                  261           343            407           524           640           484           470
FANS                    n.                   4             4              6             5             5            6              6
Air flow                m3/h              50500         50500          76000         77500         77500        108000        108000
Power input             kW                  4,4           4,4            6,6          7,75          7,75          9,3            9,3
Max absorbed current    A                    8             8             12           15,5          15,5         18,6          18,6
EVAPORATOR (1)          n.                   1             1              1             1             1            1              1
Water flow              m3/h               23,6          29,1           34,7          41,6          46,3          61,1         67,2
Pressure drops          kPa                28,8          27,6           36,2          32,2          26,4           33           39,9
Water content           l                   38            49             55            94            88            81            81
Max water flow          m3/h                31            41             43            65            68            70            70
GAS CIRCUITS            n.                   2             2              2             2             2            2              2
CAPACITY STEPS          n.                   4             4              4             4             4            4              4
DESUPERHEATER (2)
Heating capacity        kW                 42,8         52,8            63           75,7           84,2         111,1         122,5
Water flow              m3/h                7,5          9,2            11           13,2           14,7         19,4          21,3
Pressure drops          kPa                19,2         29,1           14,5           12             9,6         16,7          20,4
Water content           l
Max water flow          m3/h                16           16            15,6          20,8            32            32            32
100% HEAT RECLAIM (2)
Heating capacity        kW                180,1         230,3          271,5         323           377,7         469,4         525,9
Water flow              m3/h              31,5          40,3           47,5          56,6          66,1           79,1         88,6
Pressure drops          kPa               31,4          38,6           42,2          40,9           46            31,3          39,3
Water content           l
Max water flow          m3/h                56           64             76            76             76           99,4          99,4
PUMPING GROUP
1 pump group              PU               3/1           4/1            4/1           4/1           4/1          5/1.G         5/1.G
1 pump group              PU-LN             --            --             --            --            --            --            --
2 pumps group             PU               3/2           4/2            4/2           4/2           4/2          5/2.G         5/2.G
2 pumps group             PU-LN             --            --             --            --            --            --            --
DIMENSIONS
Lenght                  mm                3600          3600           5170          5170          5170          5900          5900
Width                   mm                1290          1290           1290          1290          1290          1540          1540
Height                  mm                2115          2115           2155          2215          2215          2470          2470
NET WEIGHT              kg                1575          1730           2095          2435          2450          3420          3420
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,15         2,95           2,95          3,09           2,71          3,29          3,15
Standard capacity steps IPLV               5,20         4,86           4,87          5,11           4,47          5,70          5,45
Standard capacity steps EMPE               4,09         3,83           3,83          4,02           3,52          4,58          4,38




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                          -5-
R407C                                                                                             UNICO.A.STD/ELN “G”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    142.F.2      188.F.2        220.F.2       260.F.2       300.F.2       385.S.2       440.S.2
Sound pressure level
1m far                   dB(A)              72          72             73            79             79            80            80
5m far                   dB(A)             61,5        61,5           63,2          67,6           67,6          70,2          70,2
10m far                  dB(A)             55,6        55,6           57,5          61,8           61,8          64,5          64,5




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    142.F.2      188.F.2        220.F.2       260.F.2       300.F.2       385.S.2       440.S.2
Mean sound pressure level
1m far                    dB(A)             66          66             67            73            73             74            74




                         UNICO.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                    142.F.2      188.F.2        220.F.2       260.F.2       300.F.2       385.S.2       440.S.2
Sound pressure level
1m far                   dB(A)             65,8        65,8           66,8          72,8           72,8          73,8          73,8
5m far                   dB(A)             55,3        55,3            57           61,4           61,4           64            64
10m far                  dB(A)             49,4        49,4           51,3          55,6           55,6          58,3          58,3




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    142.F.2      188.F.2        220.F.2       260.F.2       300.F.2       385.S.2       440.S.2
Mean sound pressure level
1m far                    dB(A)             60          60             61            67            67             68            68




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                        -6-
R407C                                                                                          UNICO.A.STD/ELN “G”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Spring antivibratin holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line with vibration absorber joint.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                             oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                             44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     -7-
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 750mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Part-Winding starting system for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     -8-
R407C                                                                                             UNICO.A.STD/ELN “G”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.ELN: Chiller in extremely low noise version.

MODEL                                    142.F.2            188.F.2             220.F.2             260.F.2             300.F.2
SIZE                                        G8                 G8                  G8                  G9                  G9
COOLING CAPACITY (1)    kW                133,5              163,6               187,8               238,3               271,3
COMPRESSORS (1)         n.                  2                   2                  2                    2                  2
Power input             kW                 44,9               59,2                 73                  80                  99
Absorbed current        A                  74,5              101,3               128,8               143,8               177,3
Max absorbed current    A                   96                131                 133                 177                 214
Starting current        A                  261                343                 407                 524                 640
FANS                    n.                  6                   6                  6                    6                  6
Air flow                m3/h              42000              42000               48000               60000               70000
Power input             kW                 6,6                 6,6                6,6                  9,3                9,3
Max absorbed current    A                   12                 12                  12                 18,6                18,6
EVAPORATOR (1)          n.                  1                   1                  1                    1                  1
Water flow              m3/h               22,9               28,1                32,2                40,9                46,6
Pressure drops          kPa                27,2               25,7                31,3                31,1                26,7
Water content           l                   38                 49                  55                  94                  88
Max water flow          m3/h                31                 41                  43                  65                  68
GAS CIRCUITS            n.                  2                   2                  2                    2                  2
CAPACITY STEPS          n.                  4                   4                  4                    4                  4
DESUPERHEATER (2)
Heating capacity        kW                41,7                51,1                58,6                74,3                84,7
Water flow              m3/h              7,3                  8,9                10,2                 13                 14,7
Pressure drops          kPa               18,1                27,2                12,6                11,5                 9,7
Water content           l
Max water flow          m3/h               16                  16                 15,6                20,8                 32
100% HEAT RECLAIM (2)
Heating capacity        kW                180,1              230,3               271,5                323                377,7
Water flow              m3/h              31,5               40,3                47,5                 56,6                66,1
Pressure drops          kPa               31,4               38,6                42,2                 40,9                 46
Water content           l
Max water flow          m3/h               56                  64                  76                  76                  76
PUMPING GROUP
1 pump group              PU               3/1                 4/1                4/1                5/1.G               5/1.G
1 pump group              PU-LN             --                  --                 --                  --                  --
2 pumps group             PU               3/2                 4/2                4/2                5/2.G               5/2.G
2 pumps group             PU-LN             --                  --                 --                  --                  --
DIMENSIONS
Lenght                  mm                5170                5170               5170                5900                 5900
Width                   mm                1290                1290               1290                1540                 1540
Height                  mm                2155                2155               2155                2470                 2470
NET WEIGHT              kg                1915                2000               2090                2670                 2670
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER               2,97                2,76                2,57                2,98                2,74
Standard capacity steps IPLV              4,91                4,56                4,24                4,91                4,52
Standard capacity steps EMPE              3,87                3,59                3,34                3,87                3,56




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                        -9-
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    142.F.2           188.F.2             220.F.2             260.F.2             300.F.2
Sound pressure level
1m far                   dB(A)             60                 60                 63                   66                  69
5m far                   dB(A)            50,2               50,2               53,2                 56,2                59,2
10m far                  dB(A)            44,5               44,5               47,5                 50,5                53,5




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    142.F.2           188.F.2             220.F.2             260.F.2             300.F.2
Mean sound pressure level
1m far                    dB(A)            54                 54                 57                   60                  63




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     - 10 -
R407C                                                                                          UNICO.A.STD/ELN “G”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.A.STD. 142.F.2 unit with PU 3/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A  96,0 +
                        - Condenser fans (*)        A   8,0 +
                        - Water pump (*)            A   5,3 =
                        Maximum electric absorption A 109,3


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                         IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                    - 11 -
R407C                                                                                                          UNICO.A.STD/ELN “G”
                                                                         Air cooled liquid chillers with reciprocating compressors and axial fans

                               OPTIONAL

                               CHILLED WATER TANKS - UNITS SIZE G7 - G8
                               Available for all air cooled liquid chillers.
                               This optional is made by 2 insulated water tanks, closed in a galvanized steel sheet box and painted.
                               The tank is supplied assembled under the unit, ready to work and with antifreeze electric heater.



CHILLER SIZE                                                                    G7                                   G8
Capacity                                 l                                      530                                  770
Water inlet                              Ø                                    3" MPT                                DN100
Water discharge                          Ø MPT                                  1/2"                                 1/2”
Air discharge                            Ø MPT                                  1/2"                                 1/2”
Empty weight                             kg                                     390                                  570
Dimensions
                               A         mm                                      1.290                               1.290
                               B         mm                                      1.380                               1.410
                               C         mm                                      1.520                               1.630
                               D         mm                                       200                                 585
                               E         mm                                      3.600                               5.170
                               F         mm                                       100                                 135
                               G         mm                                      1.600                               2.000
Fixing holes                   5         N° x Ø mm                               6x20                                6x20



CHILLED WATER TANKS G7 - G8



                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                      G                           G                  D
                       A
                                                                F         5                                5                           5
                   B
                   C                                                                                   E




                               1.   Water inlet.
                               2.   Water outlet. For exact position see the drawing of the chiller.
                               3.   Pipe for air discharge.
                               4.   Pipe for water drain.
                               5.   Fixing holes.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                                  - 12 -
R407C                                                                                                 UNICO.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CHILLED WATER TANKS - UNITS SIZE G9
                        This optional is made by 3 insulated water tanks, supplied assembled inside the unit, ready to work
                        and with antifreeze electric heater. The tank does not modify the water chiller overall dimensions.


Capacity                    l                                                          400
Water outlet                Ø DN Victaulic                                             100
Water discharge             Ø MPT                                                      1/2"
Air discharge               Ø MPT                                                      1/2"
Empty weight                kg                                                         200




CHILLED WATER TANKS G9




                                                                                   COMPRESSOR
                                               494
                                                     350
                                                           206




                                                                  500
        100             1540                                       545         4   2      3




                        2. Water outlet.
                        3. Pipe for air discharge.
                        4. Pipe for water drain.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                           - 13 -
R407C                                                                                               UNICO.A.STD/ELN “G”
                                                                Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                               HEAT RECLAIM HYDRAULIC CIRCUIT




                                         BGV                                     YR
                                                    SC




                                                     A
                                      RU

                                                                                 YR
                                          COM
                                                           B




                              SUCTION LINE                                TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                         - 14 -
R407C                                                                                            UNICO.A.STD/ELN “G”
                                                             Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                             B



                                             COM




                                 SUCTION LINE                                   TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                      - 15 -
R407C                                                                                                 UNICO.A.STD/ELN “G”
                                                                  Air cooled liquid chillers with reciprocating compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS - UNITS SIZE G7 - G8

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.

1 pump version                                              PU3/1                                    PU4/1
2 pumps version                                             PU3/2                                    PU4/2
Min. water flow             m3/h                             15                                       30
Max water flow              m3/h                             30                                       55
Total pressure
With min. water flow        kPa                             225                                       235
With max. water flow        kPa                             175                                       185
Installed power (1)         kW                              2,2                                        4
Plate current (1)           A                               5,3                                       9,6
Net weight ../1             kg                               74                                       112
Net weight ../2             kg                              112                                       164
Sound pressure level (2)    dB(A)                           70                                         72
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME G7 - G8


                                      PU.../1                                                   PU.../2
                       VE                                                       VE
                MA            YS                            MA            MA           YS                               MA




                                                   FL                                                        FL
                                        P                                                        P
                                                                                        RU              YR        RU



                                                                                                             FL
                                                                                                 P
                            MA Manometer                                                RU              YR        RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch



RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                           - 16 -
R407C                                                                                                   UNICO.A.STD/ELN “G”
                                                                   Air cooled liquid chillers with reciprocating compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS - UNITS SIZE G9

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU 5/1.G
                            Pumping group with one in line pump type.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - Water safety flow switch
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU 5/2.G
                            Pumping group with twin in line pump type. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - Water safety flow switch
                            - 2 poles electric motor.




1 pump version                                              PU5/1.G                                     --
2 pumps version                                               --                                      PU5/2.G
Min. water flow             m3/h                              40                                        40
Max water flow              m3/h                              75                                        75
Total pressure
With min. water flow        kPa                              185                                       225
With max. water flow        kPa                              170                                       145
Installe power (1)          kW                               5,5                                       5,5
Plate current (1)           A                                11                                         11
Net weight ../1             kg                               95                                         --
Net weight ../2             kg                                --                                       186
Sound pressure level (2)    dB(A)                            78                                         78
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME - G9


              VE                                                               VE
                      YS                                                              YS




                                                                                                  P
                                             FL                                                                 FL
                                 P




                            VE   Expansion tank
                            YS   Safety valve
                            P    Water pump
                            FL   Water flow switch




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                          - 17 -
R407C                                                                                           UNICO.A.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.A.STD.142.F.2 = 72 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 72-3 = 69 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                         750




                        Chiller size                       G7                  G8                   G9
                        Weight                 kg          150                 200                  260




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                     - 18 -
R407C                                                                                              UNICO.A.STD/ELN “G”
                                                               Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                  R...                             G...
                                           Light                                Medium                            Heavy
AxB                     mm                 Ø124                                 114x174                          208x208
C                       mm                  90                                    90                               122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCRCP_AG_GB407_0203                        - 19 -
R407C                      UNICO.A.STD/ELN “U”
        Air cooled liquid chillers with reciprocating compressors and axial fans




                                              RECIPROCATING compressors
                                                          457 ÷ 990 kW




                                                   RC GROUP
                                         TECHNICAL DOCUMENTATION
                                         UNCRCP_AU_GB407_0203
R407C                                                                                           UNICO.A.STD/ELN “U”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                         WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                     -2-
R407C                                                                                          UNICO.A.STD/ELN “U”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • Non return valve on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                            oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • Part-Winding starting system.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                     -3-
R407C                                                                                           UNICO.A.STD/ELN “U”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        UNICO.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Spring antivibration holders for compressors.
                          - Copper suction and discharge line with vibration absorber joint.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - STD units: PU pumping group with 2 poles water pumps.
                          - STD + kit LNO: PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                         WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                     -4-
R407C                                                                                             UNICO.A.STD/ELN “U”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                    495.S.2   550.S.2     600.S.2    660.S.2     770.S.2     880.S.2     990.S.2    1100.S.2
SIZE                                       U10       U10         U11        U11         U12         U13         U14         U14
COOLING CAPACITY (1)    kW                457,1     493,9       563,8      601,6       705,5       802,1       914,9       988,9
COMPRESSORS (1)         n.                  2         2           2          2           2           2           2           2
Power input             kW                139,2     156,3       170,3      187,2       217,8       247,3       277,3       308,9
Absorbed current        A                 232,9     260,2       282,1      308,6       359,5       408,6       471,6        538
Max absorbed current    A                  271       300         331        362         421         480         547         614
Starting current        A                  600       616         724        740         955         988        1154        1186
FANS                    n.                  8         8           10         10          12          14          16          16
Air flow                m3/h             132000    132000      165000     165000      198000      231000      264000      264000
Power input             kW                11,2       11,2         14         14         16,8        19,6        22,4        22,4
Max absorbed current    A                 21,6       21,6         27         27         32,4        37,8        43,2        43,2
EVAPORATOR (1)          n.                  1         1           1          1           1           1           1           1
Water flow              m3/h              78,4       84,7        96,7      103,2        121        137,6        157        169,7
Pressure drops          kPa               33,9      39,6         26,2       29,8        36,2        46,8        74,2        86,7
Water content           l                  125       125         222        222         207         207         185         185
Max water flow          m3/h               100       100         140        140        151,1       151,1        180         180
GAS CIRCUITS            n.                  2         2           2          2           2           2           2           2
CAPACITY STEPS          n.                  4         4           4          4           4           4           4           4
DESUPERHEATER (2)
Heating capacity        kW               142,6      154,1       175,9       187,7      220,1       250,3       285,4       308,5
Water flow              m3/h             24,8       26,8        30,6         32,7       38,3        43,6        49,7        53,7
Pressure drops          kPa              19,6        17,1        19,7         20        22,5        24,3         34         42,8
Water content           l
Max water flow          m3/h               48         64            70       76          76          76         85,1        94,2
100% HEAT RECLAIM (2)
Heating capacity        kW               607,9      670,9       744,4       806,5      943,8       1072       1215,8      1336,1
Water flow              m3/h             102,5      113,1       125,5        136       159,1       180,7       205        225,2
Pressure drops          kPa              39,7       41,4        47,8        52,7        43,7        37,8        39         38,7
Water content           l
Max water flow          m3/h              145        160         165        170         215         260         285         310
PUMPING GROUP
1 pump group              PU               6/1       7/1         7/1         7/1        8/1         8/1         8/1         9/1
1 pump group              PU-LN            6/1       7/1         7/1         7/1        8/1         8/1         8/1         9/1
2 pumps group             PU               6/2       7/2         7/2         7/2        8/2         8/2         8/2         9/2
2 pumps group             PU-LN            6/2       7/2         7/2         7/2        8/2         8/2         8/2         9/2
DIMENSIONS
Lenght                  mm                5500      5500        6490        6490        7480       8470        9460        9460
Width                   mm                2130      2130        2130        2130        2130       2130        2130        2130
Height                  mm                2430      2430        2430        2430        2430       2430        2430        2430
NET WEIGHT              kg                4450      4460        4960        5140        5870       6540        7140        7150
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER               3,28       3,16       3,31        3,21        3,24        3,24        3,30        3,20
Standard capacity steps IPLV              5,68       5,47       5,73        5,56        5,60        5,61        5,71        5,54
Standard capacity steps EMPE              4,56       4,39       4,60        4,47        4,50        4,51        4,59        4,45




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                        -5-
R407C                                                                                            UNICO.A.STD/ELN “U”
                                                             Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    495.S.2   550.S.2    600.S.2     660.S.2     770.S.2     880.S.2     990.S.2    1100.S.2
Sound pressure level
1m far                   dB(A)             80        80             80       80          81          82          82          82
5m far                   dB(A)            69,5      69,5           68,6     68,6        71,2        71,4        72,7        72,7
10m far                  dB(A)            63,6      63,6           62,8     62,8        65,5        65,8        67,3        67,3




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    495.S.2   550.S.2    600.S.2     660.S.2     770.S.2     880.S.2     990.S.2    1100.S.2
Mean sound pressure level
1m far                    dB(A)            76        76            76       76           77          78          78          78




                         UNICO.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.

MODEL                                    495.S.2   550.S.2    600.S.2     660.S.2     770.S.2     880.S.2     990.S.2    1100.S.2
Sound pressure level
1m far                   dB(A)            73,8      73,8           73,8     73,8        74,8        75,8        75,8        75,8
5m far                   dB(A)            63,3      63,3           62,4     62,4         65         65,2        66,5        66,5
10m far                  dB(A)            57,4      57,4           56,6     56,6        59,3        59,6        61,1        61,1




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    495.S.2   550.S.2    600.S.2     660.S.2     770.S.2     880.S.2     990.S.2    1100.S.2
Mean sound pressure level
1m far                    dB(A)            70        70            70       70           71          72          72          72




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                       -6-
R407C                                                                                          UNICO.A.STD/ELN “U”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven low speed axial fans protected by safety mesh.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Spring antivibratin holders for compressor.
                        • Condensing control system by stepless condenser fans speed, through electronic regulators
                          directly driven by the proportional signal managed by MP99 microprocessor control, allowing the
                          following operating conditions:
                          - Full load with outdoor temperature from -15 to +37/40°C.
                          - Full load with fans at max speed and noise pressure increased of about 5÷6 dB(A) with outdoor
                             temperature up to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                             Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line with vibration absorber joint.
                          - Copper discharge line with vibration absorber joint.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                             oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                             Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                             controls.
                          - Contactors on each single load.
                          - 44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                     -7-
R407C                                                                                           UNICO.A.STD/ELN “U”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        UNICO.A.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU-LN pumping group with 4 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                         WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                     -8-
R407C                                                                                             UNICO.A.STD/ELN “U”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.ELN: Chiller in extremely low noise version.

MODEL                                    385.S.2   440.S.2     495.S.2    550.S.2     600.S.2     660.S.2     770.S.2     880.S.2
SIZE                                       U10       U10         U11        U11         U12         U12         U13         U14
COOLING CAPACITY (1)    kW                356,3     392,9       456,2      492,7       558,4        595        693,9       786,1
COMPRESSORS (1)         n.                   2         2           2          2          2           2           2           2
Power input             kW                 108      124,6       139,3      156,5       171,3       188,3       219,9       250,3
Absorbed current        A                 183,7     209,6       233,2      260,6       283,8       310,8       363,1       413,6
Max absorbed current    A                  209       242         271        300         331         362         421         480
Starting current        A                  484       470         600        616         724         740         955         988
FANS                    n.                   8         8          10         10          12          12          14          16
Air flow                m3/h              98000     98000      122500     122500      147000      147000      171500      196000
Power input             kW                  7,5       7,5         9,4        9,4        11,3        11,3        13,2         15
Max absorbed current    A                  13,6      13,6         17         17        20,4        20,4         23,8        27,2
EVAPORATOR (1)          n.                   1         1           1          1          1           1           1           1
Water flow              m3/h               61,1      67,2        78,3       84,5        95,8       102,1       119,1       134,9
Pressure drops          kPa                33,1      39,9        33,8       39,4        25,7        29,1         35          45
Water content           l                   81        81         125        125         222         222         207         207
Max water flow          m3/h                70        70         100        100         140         140        151,1       151,1
GAS CIRCUITS            n.                   2         2           2          2          2           2           2           2
CAPACITY STEPS          n.                   4         4           4          4          4           4           4           4
DESUPERHEATER (2)
Heating capacity        kW               111,2      122,6       142,3       153,7      174,2       185,6       216,5       245,3
Water flow              m3/h             19,4       21,4        24,8         26,8       30,3        32,3        37,7        42,7
Pressure drops          kPa              20,5        20,4        19,5         17       19,3         19,6        21,8        23,3
Water content           l
Max water flow          m3/h              26,4        32            48       64          70          76          76          76
100% HEAT RECLAIM (2)
Heating capacity        kW               471,7      532,3       607,9       670,9      744,4       806,5       943,8       1072
Water flow              m3/h             79,5        89,7       102,5       113,1      125,5        136        159,1       180,7
Pressure drops          kPa              43,4         36        39,7        41,4       47,8        52,7        43,7        37,8
Water content           l
Max water flow          m3/h              102        130         145        160         165         170         215         260
PUMPING GROUP
1 pump group              PU                --        --          --          --         --          --          --          --
1 pump group              PU-LN            5/1       5/1         6/1         7/1        7/1         7/1         8/1         8/1
2 pumps group             PU                --        --          --          --         --          --          --          --
2 pumps group             PU-LN            5/2       5/2         6/2         7/2        7/2         7/2         8/2         8/2
DIMENSIONS
Lenght                  mm                5500      5500        6490        6490        7480       7480        8470        9460
Width                   mm                2130      2130        2130        2130        2130       2130        2130        2130
Height                  mm                2430      2430        2430        2430        2430       2430        2430        2430
NET WEIGHT              kg                4340      4350        4950        4960        5670       5670        6370        7020
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER               3,30       3,15       3,27        3,15        3,26        3,16        3,16        3,14
Standard capacity steps IPLV              5,71       5,46       5,67        5,45        5,64        5,47        5,46        5,43
Standard capacity steps EMPE              4,59       4,38       4,55        4,38        4,53        4,39        4,39        4,37




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                        -9-
R407C                                                                                             UNICO.A.STD/ELN “U”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    385.S.2   440.S.2      495.S.2    550.S.2     600.S.2     660.S.2     770.S.2     880.S.2
Sound pressure level
1m far                   dB(A)             67        67            67         67          67          67          68          68
5m far                   dB(A)            56,5      56,5          55,6       55,6        57,2        57,2        57,4        58,7
10m far                  dB(A)            50,6      50,6          49,8       49,8        51,5        51,5        51,8        53,3




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    385.S.2   440.S.2      495.S.2    550.S.2     600.S.2     660.S.2     770.S.2     880.S.2
Mean sound pressure level
1m far                    dB(A)            63        63               63      63          63          63          64          64




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                       - 10 -
R407C                                                                                          UNICO.A.STD/ELN “U”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.A.STD. 495.S.2 unit with PU 6/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 271,0 +
                        - Condenser fans (*)        A  21,6 +
                        - Water pump (*)            A  16,0 =
                        Maximum electric absorption A 308,6


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                         IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                    - 11 -
R407C                                                                                                 UNICO.A.STD/ELN “U”
                                                                  Air cooled liquid chillers with reciprocating compressors and axial fans

                         OPTIONAL

                         CHILLED WATER TANKS
                         This optional is made by an insulated horizontal water tank supplied assembled inside the unit, with
                         antifreeze electric heater and ready to work. The tank does not modify the water chiller overall
                         dimensions.


Capacity                       l              1.400                 2.000               2.500                  3.000
Connections                    Ø                                                See the chiller drawing
Air discharge                  Ø MPT           1/2"                  1/2"                1/2"                  1/2"
Water drain                    Ø MPT           1/2"                  1/2"                1/2"                  1/2"
Empty weight                   kg              370                    633                761                    900
Dimensions                     A mm            600                   730                 730                   730
                               B mm            900                   1140               1110                   1110
                               C mm            1600                  1600               1600                   1600




UNICO.A.STD
MODEL                                     495.S.2     550.S.2     600.S.2     660.S.2     770.S.2     880.S.2     990.S.2           1100.S.2
Capacity                       l           2000        2000        2500        2500        2500        2500        2500               2500


UNICO.A.ELN
MODEL                                     385.S.2     440.S.2     495.S.2     550.S.2     600.S.2     660.S.2     770.S.2           880.S.2
Capacity                       l           1400        1400        2000        2000        2500        2500        2500              2500




CHILLED WATER TANK




                                                                                                                       2a




                                                                                                                       1
                                                                                                                                    C




                                                                                                                       2
                                                                                                                                B
                                                                                                                            A




                  1065                 1065                              3                                 4



                         1.    Water inlet.
                         2.    Water outlet.
                         2a.   Water outlet with pumping group.
                         3.    Air discharge.
                         4.    Water drain.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                          - 12 -
R407C                                                                                               UNICO.A.STD/ELN “U”
                                                                Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                               HEAT RECLAIM HYDRAULIC CIRCUIT




                                         BGV                                     YR
                                                    SC




                                                     A
                                      RU

                                                                                 YR
                                          COM
                                                           B




                              SUCTION LINE                                TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                         - 13 -
R407C                                                                                            UNICO.A.STD/ELN “U”
                                                             Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                             B



                                             COM




                                 SUCTION LINE                                   TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                      - 14 -
R407C                                                                                                   UNICO.A.STD/ELN “U”
                                                                   Air cooled liquid chillers with reciprocating compressors and axial fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            VERSIONE AD 1 POMPA - PU.../1 • PU-LN.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.

                            TWO PUMPS VERSION - PU.../2 • PU-LN.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - PU... 2 poles electric motor.
                            - PU-LN... 4 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.
                                            2 POLES                                            4 POLES
1 pump version                   PU5/1 PU6/1 PU7/1 PU8/1 PU9/1               PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
2 pumps version                  PU5/2 PU6/2 PU7/2 PU8/2 PU9/2               PU-LN5/1 PU-LN6/1 PU-LN7/1 PU-LN8/1 PU-LN9/1
Min. water flow             m3/h 37,8    75     75   75   108                  37,8      75        75      75      108
Max water flow              m3/h  84    150    168  180   240                   84      132       168     180      210
Total pressure
With min. water flow        kPa     220     200     275     340     300         205           215        262          312        293
With max. water flow        kPa     155     130     160     180     190         171           127        159          198         140
Installed power (1)         kW      5,5     7,5      11      15     18,5         5,5          7,5         11           15          15
Plate current (1)           A       12      16      22,5     30     35,1        12,5          16         21,8         28,5       28,5
Net weight ../1             kg      270     320     370     390     450         360           390        540          560        600
Net weight ../2             kg      450     520     610     650     750         600           650        890          930        1000
Sound pressure level (2)    dB(A)    78      78      82      82      82          69            69         74           74          74

(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME

                                      PU.../1                                                       PU.../2
                       VE                                                        VE
                MA            YS                             MA            MA           YS                                MA




                                                   FL                                                           FL
                                        P                                                           P
                                                                                         RU              YR          RU



                            MA Manometer                                                            P
                                                                                                                FL
                            VE Expansion tank                                            RU              YR          RU

                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch


RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                            - 15 -
R407C                                                                                           UNICO.A.STD/ELN “U”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.A.STD.495.S.2 = 80 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 80-3 =77 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               U10         U11         U12          U13         U14
                        Weight               kg    310         375         440          505         570




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                    - 16 -
R407C                                                                                              UNICO.A.STD/ELN “U”
                                                               Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                  R...                             G...
                                           Light                                Medium                            Heavy
AxB                     mm                 Ø124                                 114x174                          208x208
C                       mm                  90                                    90                               122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCRCP_AU_GB407_0203                        - 17 -
R407C                               UNICO.A.STD “M”
        Air cooled liquid chillers with reciprocating compressors and axial fans




                                              RECIPROCATING compressors
                                                         500 ÷ 1950 kW




                                                   RC GROUP
                                         TECHNICAL DOCUMENTATION
                                         UNCRCP_AM_GB407_0203
R407C                                                                                                 UNICO.A.STD “M”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -15°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -15°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        All limit and working values showed in the catalogue are referred to nominal conditions with water
                        to the evaporator 12/7°C and R407C refrigerant charge. For different working conditions and/or
                        other refrigerants, please check the limit operating conditions of the specific model with the
                        electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                     -2-
R407C                                                                                                UNICO.A.STD “M”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.A.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel profiles.
                        • Internal supporting frame made of galvanized steel profiles.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Evaporator antifreeze heater.
                        • Direct driven axial fans protected by special safety mesh.
                        • Condensing coil with copper tubes, continuous aluminium finning with aluminium or epoxy painted
                          galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • Non return valve on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Rubber holders for compressor.
                        • Step-step condensing control system, acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from -5 to +43/46°C.
                          - Partial load (if scheduled) with outdoor temperature up to +48/52°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Copper discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                            oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • Part-Winding starting system.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.

                        WARNING
                        “M+M”units, from model 1750.S.4 up to model 2190.S.4, are supplied in two sections for transport
                        and handling needs.
                        The main section includes the electric box, one evaporator and two compressors.
                        The second section includes one evaporator and two compressors.
                        The chiller is internally scheduled for the electrical connections between the two sections.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                    -3-
R407C                                                                                                 UNICO.A.STD “M”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        UNICO.A.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit:
                          - Sound absorption box, with special deadening material, for each compressor.
                          - Spring antivibration holders for compressors.
                          - Copper suction and discharge line with vibration absorber joint.
                          - Condensing control system by stepless condenser fans speed, through electronic regulators
                            directly driven by the proportional signal managed by MP99 microprocessor control, allowing
                            the following operating conditions:
                            ◊ Full load with outdoor temperature from -15 to +34/38°C.
                            ◊ Full load with fans at max speed and noise pressure increased up to the STD units with
                               outdoor temperature up to +43/46°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +48/52°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 996mm.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • Condensing control system with continuous variation of the condenser fans speed through
                          electronic regulators directly driven by the proportional signal managed by MP99 microprocessor
                          control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Compressor thermal protection relay for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" "N+O" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                     -4-
R407C                                                                                                      UNICO.A.STD “M”
                                                                 Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                    550.S.2      600.S.2          660.S.2     770.S.2       880.S.2      990.S.2      1100.S.2
SIZE                                      M16          M16               M16         M17           M17          M18           M18
COOLING CAPACITY (1)    kW                506,4        558,2            600,4       703,8         782,2        893,4         972,4
COMPRESSORS (1)         n.                  2            2                2           2             2            2             2
Power input             kW                153,7        171,3            187,4       218,1         251,1        281,1         311,5
Absorbed current        A                 255,8        283,9             309         360          414,8        478,3         542,5
Max absorbed current    A                  300          331              362         421           480          547           614
Starting current        A                  616          724              740         955           988         1154          1186
FANS                    n.                  8            8                8           10            10           12            12
Air flow                m3/h             158000       157000           156000      196250        195000       235500        234000
Power input             kW                11,2         11,2              11,2         14            14          16,8          16,8
Max absorbed current    A                 21,6         21,6              21,6         27            27          32,4          32,4
EVAPORATOR (1)          n.                  1            1                1           1             1            1             1
Water flow              m3/h              86,9         95,8              103        120,8         134,2        153,3         166,9
Pressure drops          kPa               41,6         25,6              29,7         36           44,5         70,7          83,8
Water content           l                  125          222              222         207           207          185           185
Max water flow          m3/h               100          140              140        151,1         151,1         180           180
GAS CIRCUITS            n.                  2            2                2           2             2            2             2
CAPACITY STEPS          n.                  4            4                4           4             4            4             4
DESUPERHEATER (2)
Heating capacity        kW                 158         174,2           187,3        219,6          244          278,7        303,4
Water flow              m3/h               27,5        30,3             32,6        38,2           42,5          48,6        52,9
Pressure drops          kPa                 18         19,3            19,9         22,4           23,1          28,1        31,2
Water content           l
Max water flow          m3/h                64            70             76           76            76           76            76
100% HEAT RECLAIM (2)
Heating capacity        kW                670,9        744,4           806,5        943,8         1072         1215,8        1336,1
Water flow              m3/h              113,1        125,5            136         159,1         180,7         205          225,2
Pressure drops          kPa               41,4         47,8            52,7          43,7          37,8          39           38,7
Water content           l
Max water flow          m3/h               160            165           170          215           260           285          310
DIMENSIONS
Lenght                  mm                5000          5000            5000         6070         6070          7140         7140
Width                   mm                2350          2350            2350         2350         2350          2350         2350
Height                  mm                2510          2510            2510         2510         2510          2510         2510
NET WEIGHT              kg                5110          5110            5110         5900         6060          6620         6620
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,29           3,26          3,20         3,23          3,12         3,18          3,12
Standard capacity steps IPLV               5,70           5,64          5,54         5,58          5,39         5,50          5,40
Standard capacity steps EMPE               4,58           4,53          4,45         4,49          4,33         4,42          4,34




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                           -5-
R407C                                                                                                   UNICO.A.STD “M”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                    1210.S.3           1320.S.3           1420.S.3            1530.S.3           1640.S.3
SIZE                                       M19                M20                M20                  M21                M21
COOLING CAPACITY (1)    kW                1092,7             1197,4             1286,5              1393,5             1463,6
COMPRESSORS (1)         n.                   3                  3                  3                   3                  3
Power input             kW                 346,4              374,8              410,1               436,2              468,2
Absorbed current        A                  572,1              619,3              691,3               748,4              815,3
Max absorbed current    A                   661                720                787                 854                921
Starting current        A                  1085               1117               1283                1316               1348
FANS                    n.                  14                 16                 16                   18                 18
Air flow                m3/h              273000             312000             312000              351000             351000
Power input             kW                 19,6               22,4               22,4                 25,2               25,2
Max absorbed current    A                  37,8               43,2               43,2                 48,6               48,6
EVAPORATOR (1)          n.                   1                  1                  1                   1                  1
Water flow              m3/h               187,5              205,5              220,7               239,1              251,1
Pressure drops          kPa                62,7               75,3               62,2                  73               80,5
Water content           l                   200                200                423                 423                423
Max water flow          m3/h                220                220                280                 280                280
GAS CIRCUITS            n.                   3                  3                  3                   3                  3
CAPACITY STEPS          n.                   6                  6                  6                   6                  6
DESUPERHEATER (2)
Heating capacity        kW                340,9              373,6               401,4              434,8               456,6
Water flow              m3/h              59,4               65,1                69,9                75,7                79,5
Pressure drops          kPa               25,6               24,1                30,6                34,2                41,6
Water content           l
Max water flow          m3/h               114                114                132,2              123,1               141,4
100% HEAT RECLAIM (2)
Heating capacity        kW               1488,8              1615,5             1766,3              1892,3              2017,3
Water flow              m3/h              251                 272,3              297,8               319                340,1
Pressure drops          kPa               41,9                38,1               39,3                39,2                39,2
Water content           l
Max water flow          m3/h               345                390                 415                440                 465
DIMENSIONS
Lenght                  mm                8490                9560               9560               10630               10630
Width                   mm                2350                2350               2350               2350                2350
Height                  mm                2510                2510               2510               2510                2510
NET WEIGHT              kg                8350                9160               9420               9600                9600
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,15               3,19               3,14                3,19                3,13
Standard capacity steps IPLV               5,46               5,53               5,43                5,53                5,41
Standard capacity steps EMPE               4,38               4,44               4,36                4,44                4,35




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                        -6-
R407C                                                                                                   UNICO.A.STD “M”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                        TECHNICAL DATA

                        UNICO.A.STD: Chiller in standard version.

MODEL                                    1750.S.4          1860.S.4            1970.S.4           2080.S.4            2190.S.4
SIZE                                     M17+M17           M18+M17             M18+M17            M18+M18             M18+M18
COOLING CAPACITY (1)    kW                1564,4            1672,8              1733,6             1875,5              1944,9
COMPRESSORS (1)         n.                   4                 4                   4                  4                   4
Power input             kW                 502,1             528,6               558,7              591,2                623
Absorbed current        A                  829,5             887,2                951              1018,4              1085,1
Max absorbed current    A                   960              1027                1094               1161                1228
Starting current        A                  1247              1413                1445               1478                1510
FANS                    n.                  20                22                  22                 24                   24
Air flow                m3/h              390000            429000              429000             468000              468000
Power input             kW                  28               30,8                30,8               33,6                33,6
Max absorbed current    A                   54               59,4                59,4               64,8                64,8
EVAPORATOR (1)          n.                   2                 2                   2                  2                   2
Water flow              m3/h               268,4             276,5               276,4              321,8               333,7
Pressure drops          kPa                44,5                52                  52                78                 83,8
Water content           l                   413               391                 391                369                 369
Max water flow          m3/h               302,2             331,1               331,1               360                 360
GAS CIRCUITS            n.                   4                 4                   4                  4                   4
CAPACITY STEPS          n.                   8                 8                   8                  8                   8
DESUPERHEATER (2)
Heating capacity        kW                488,1              521,9               540,9              585,2               606,8
Water flow              m3/h               85                90,9                94,2               101,9               105,7
Pressure drops          kPa               23,1               29,5                30,5                37                 41,3
Water content           l
Max water flow          m3/h               152               179,4               170,2              179,4               188,5
100% HEAT RECLAIM (2)
Heating capacity        kW                2144               2260,5             2365,9              2556,5              2672,2
Water flow              m3/h              361,4               381,1              398,8               431                450,5
Pressure drops          kPa               37,8                37,5               36,9                 39                 38,7
Water content           l
Max water flow          m3/h               520                545                 570                595                 620
DIMENSIONS
Lenght                  mm                12190              13260              13260               14330               14330
Width                   mm                 2350              2350               2350                2350                2350
Height                  mm                 2510              2510               2510                2510                2510
NET WEIGHT              kg                11920              12580              12580               13240               13240
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency      EER                3,12               3,16               3,10                3,17                3,12
Standard capacity steps IPLV               5,39               5,47               5,37                5,49                5,40
Standard capacity steps EMPE               4,33               4,40               4,31                4,41                4,34




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                        -7-
R407C                                                                                                     UNICO.A.STD “M”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    550.S.2     600.S.2          660.S.2    770.S.2       880.S.2         990.S.2    1100.S.2
Sound pressure level
1m far                   dB(A)              88          88               88         88            88             88          89
5m far                   dB(A)             77,5        77,5             77,5       76,6          76,6           78,2        79,2
10m far                  dB(A)             71,6        71,6             71,6       70,8          70,8           72,5        73,5

MODEL                                    1210.S.3            1320.S.3           1420.S.3           1530.S.3              1640.S.3
Sound pressure level
1m far                   dB(A)              89                  89                 89                    89                 89
5m far                   dB(A)             78,4                79,7               79,7                  79,7               79,7
10m far                  dB(A)             72,8                74,3               74,3                  74,3               74,3

MODEL                                    1750.S.4            1860.S.4           1970.S.4           2080.S.4              2190.S.4
Sound pressure level
1m far                   dB(A)              89                  89                 89                    89                 89
5m far                   dB(A)             79,2                79,2               79,2                  79,2               79,2
10m far                  dB(A)             74,8                74,8               74,8                  74,8               74,8




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    550.S.2     600.S.2          660.S.2    770.S.2       880.S.2         990.S.2    1100.S.2
Mean sound pressure level
1m far                    dB(A)             84          84              84          84           84              84          85

MODEL                                    1210.S.3            1320.S.3           1420.S.3           1530.S.3              1640.S.3
Mean sound pressure level
1m far                    dB(A)             85                 85                  85                   85                 85

MODEL                                    1750.S.4            1860.S.4           1970.S.4           2080.S.4              2190.S.4
Mean sound pressure level
1m far                    dB(A)             86                 86                  86                   86                 86




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                        -8-
R407C                                                                                                     UNICO.A.STD “M”
                                                              Air cooled liquid chillers with reciprocating compressors and axial fans

                         ACOUSTIC DATA

                         UNICO.A.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side.
MODEL                                    550.S.2     600.S.2          660.S.2    770.S.2       880.S.2         990.S.2    1100.S.2
Sound pressure level
1m far                   dB(A)              80          80               80         80            80             80          81
5m far                   dB(A)             69,5        69,5             69,5       68,6          68,6           70,2        71,2
10m far                  dB(A)             63,6        63,6             63,6       62,8          62,8           64,5        65,5

MODEL                                    1210.S.3            1320.S.3           1420.S.3           1530.S.3              1640.S.3
Sound pressure level
1m far                   dB(A)              81                  81                 81                    81                 81
5m far                   dB(A)             70,4                71,7               71,7                  71,2               71,2
10m far                  dB(A)             64,8                66,3               66,3                  66,8               66,8

MODEL                                    1750.S.4            1860.S.4           1970.S.4           2080.S.4              2190.S.4
Sound pressure level
1m far                   dB(A)              81                  81                 81                    81                 81
5m far                   dB(A)             71,2                71,2               71,2                  71,2               71,2
10m far                  dB(A)             66,8                66,8               66,8                  66,8               66,8




                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions, according to ISO 3744 norm.

MODEL                                    550.S.2     600.S.2          660.S.2    770.S.2       880.S.2         990.S.2    1100.S.2
Mean sound pressure level
1m far                    dB(A)             76          76              76          76           76              76          77

MODEL                                    1210.S.3            1320.S.3           1420.S.3           1530.S.3              1640.S.3
Mean sound pressure level
1m far                    dB(A)             77                 77                  77                   77                 77

MODEL                                    1750.S.4            1860.S.4           1970.S.4           2080.S.4              2190.S.4
Mean sound pressure level
1m far                    dB(A)             78                 78                  78                   78                 78




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                        -9-
R407C                                                                                                UNICO.A.STD “M”
                                                           Air cooled liquid chillers with reciprocating compressors and axial fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.A.STD. 550.S.2 unit:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A 300,0 +
                        - Condenser fans (*)        A  21,6 +
                        Maximum electric absorption A 321,6


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                    - 10 -
R407C                                                                                                     UNICO.A.STD “M”
                                                                Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                       YR
                                                    SC




                                                     A
                                      RU

                                                                                 YR
                                         COM
                                                           B




                              SUCTION LINE                                TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                         - 11 -
R407C                                                                                                  UNICO.A.STD “M”
                                                             Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                             B



                                             COM




                                 SUCTION LINE                                   TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                      - 12 -
R407C                                                                                                 UNICO.A.STD “M”
                                                            Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.A.STD.550.S.2 = 80 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 80-3 =77 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                       996




                        Chiller size               M16         M17         M18         M19          M20         M21
                        Weight               kg    300         375         440         505          570         635

                        Chiller size              M17+M17               M18+M17                  M18+M18
                        Weight               kg     750                   815                      880




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                    - 13 -
R407C                                                                                                    UNICO.A.STD “M”
                                                               Air cooled liquid chillers with reciprocating compressors and axial fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                  R...                             G...
                                           Light                                Medium                            Heavy
AxB                     mm                 Ø124                                 114x174                          208x208
C                       mm                  90                                    90                               122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                          C




                                                                 AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCRCP_AM_GB407_0203                        - 14 -
R407C                            UNICO.C.STD/ELN “G”
        Air cooled liquid chillers with reciprocating compressors and centrifugal fans




                                                    RECIPROCATING compressors
                                                                130 ÷ 265 kW




                                                         RC GROUP
                                               TECHNICAL DOCUMENTATION
                                               UNCRCP_CG_GB407_0203
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        WORKING LIMITS

                        COOLING MODE
                        Evaporator water temperature:
                        +6°C     Leaving water minimum temperature.
                        -6°C     Leaving water minimum temperature by adding antifreeze.
                        -30°C    Leaving water minimum temperature by adding antifreeze and BRINE kit.
                        +20°C    Inlet water maximum temperature.

                        Outdoor air temperature:
                        -5°C      minimum value.
                        -30°C     minimum value with condensing control system.
                        +41°C     maximum value for unit in full load conditions.
                        +47°C     maximum value for unit in partial load conditions.

                        HEAT RECOVERY SYSTEMS:
                        + 30÷48°C Outlet water temperature range value.




                        WARNING
                        The working and limit values showed in the catalogue are referred to nominal working conditions
                        with water to the evaporator 12/7°C and R407C refrigerant charge.
                        For different working conditions and/or other refrigerants, please check the limit operating condi-
                        tions, of the specific model, with the electronic selection program RCWORLD.

                        All the products manufactured by the RC GROUP, in its manufacturing divisions, RC CONDIZIONA-
                        TORI, AMP and SIMAIR, are designed and produced with materials and components suitable to be
                        exposed to temperatures of -40÷45°C without any damage to the material structure nor to the
                        components and machines operational characteristics.
                        In case it will be required that the RC GROUP products, for outdoor installations, will grant working
                        continuity with outside temperatures lower than -15°C, a low ambient temperature kit, with features
                        different for each product, is available upon request.

RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     -2-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.C.STD: Chiller in standard version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Double suction centrifugal fans with forward-curved blades, fitted with rubber gasket for fan outlet
                          sealing to the unit structure and equipped with rubber antivibration holders. Each fan is equipped
                          with its own belt driven system with 3 phase 4 poles electric motor, adjustable drive pulley and
                          adjustable fan motor base for belt tightening.
                        • Air exhaustion on condenser coil side.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric
                          heater.
                        • Stop valves on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Rubber holders for compressor.
                        • ON/OFF condensing control system acting on condenser fans, allowing the following operating
                          conditions:
                          - Full load with outdoor temperature from +5°C to +42/44°C.
                          - Partial load (if scheduled) with outdoor temperature up to +46/50°C.
                            Over this limit a safety device stop the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                            oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.




                        WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     -3-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        UNICO.C.STD: Chiller in standard version.

                        OPTIONAL
                        • LNO kit :
                          - Panels and technical compartment insulated by means of special sound deadening materials.
                          - Condensing control system with air flow variation through special air damper, installed on the
                            fan outlet, and proportional motor directly driven by the proportional signal managed by MP99
                            microprocessor control:
                            ◊ Full load with outdoor temperature from -30°C to 32/36°C.
                            ◊ Full load with fans at max air flow and noise pressure increased up to the STD units with
                               outdoor temperature up to +42/44°C.
                            ◊ Partial load (if scheduled) with outdoor temperature up to +46/50°C. Over this limit a safety
                               device stop the unit.
                        • Noise absorption plenum on fans air discharge, height 750mm for version with air discharge from
                          the top.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • Kit for outdoor installation with evaporator antifreeze electric heater.
                        • Air exhaustion from the top (vertical air flow).
                        • Overpressure dampers on fans mouth.
                        • Condensing control system, for STD units, with air flow variation through special air damper,
                          installed pn the fan outlet, and proportional motor directly driven by the proportional signal
                          managed by MP99 microprocessor control.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Part-Winding starting system for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed.




                        WARNING
                        The units are fitted with double air circuit from size G7 included. T
                        he condenser air discharge ducting must have a partition.

                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     -4-
R407C                                                                                             UNICO.C.STD/ELN “G”
                                                        Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        TECHNICAL DATA

                        UNICO.C.STD: Chiller in standard version.

MODEL                                    142.F.2             188.F.2             220.F.2              260.F.2             300.F.2
SIZE                                        G7                  G7                  G8                   G8                  G8
COOLING CAPACITY (1)      kW              130,5               165,6               193,8                 237                264,6
COMPRESSORS (1)           n.                 2                   2                   2                    2                  2
Power input               kW               45,8                58,6                 71                  80,5               101,7
Absorbed current          A                75,9               100,4               126,1                144,4               181,2
Max absorbed current      A                 96                 131                 133                  177                 214
Starting current          A                261                 343                 407                  524                 640
FANS                      n.                 4                   4                   4                    4                  4
Air flow                  m3/h            40000               40000               54000                60000               63000
Available static pressure Pa                50                  50                  50                   50                  50
Power input               kW                8,8                 8,8                 8,8                  12                  12
Max absorbed current      A               20,14               20,14               20,14                26,22               26,22
EVAPORATOR (1)            n.                 1                   1                   1                    1                  1
Water flow                m3/h             22,4                28,4                33,3                 40,7                45,4
Pressure drops            kPa               26                 26,3                33,3                 30,7                25,4
Water content             l                 38                  48                  54                   93                  87
Max water flow            m3/h              31                  41                  43                   65                  68
GAS CIRCUITS              n.                 2                   2                   2                    2                  2
CAPACITY STEPS            n.                 4                   4                   4                    4                  4
DESUPERHEATER (2)
Heating capacity          kW               40,7                51,7                60,5                73,9                 82,6
Water flow                m3/h              7,1                 9                  10,5                12,9                 14,4
Pressure drops            kPa              17,3                27,9                13,4                11,4                  9,2
Water content             l
Max water flow            m3/h              16                  16                 15,6                20,8                  32
100% HEAT RECLAIM (2)
Heating capacity          kW              180,1               230,3               271,5                323                  377,7
Water flow                m3/h            31,5                40,3                47,5                 56,6                  66,1
Pressure drops            kPa             31,4                38,6                42,2                 40,9                   46
Water content             l
Max water flow            m3/h              56                  64                  76                  76                   76
PUMPING GROUP
1 pump group                PU             3/1                 4/1                  4/1                 4/1                  4/1
1 pump group                PU-LN           --                  --                   --                  --                   --
2 pumps group               PU             3/2                 4/2                  4/2                 4/2                  4/2
2 pumps group               PU-LN           --                  --                   --                  --                   --
DIMENSIONS
Lenght                    mm              3600                 3600                5170                5170                 5170
Width                     mm              1290                 1290                1290                1290                 1290
Height                    mm              2010                 2010                2050                2050                 2050
NET WEIGHT                kg              1795                 1930                2380                2740                 2770
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER              2,85                2,83                2,73                2,94                 2,60
Standard capacity steps   IPLV             4,70                4,66                4,50                4,86                 4,29
Standard capacity steps   EMPE             3,70                3,67                3,55                3,83                 3,38




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                        -5-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                         ACOUSTIC DATA

                         UNICO.C.STD: Chiller in standard version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.
MODEL                                    142.F.2            188.F.2             220.F.2              260.F.2             300.F.2
Sound pressure level
1m far                   dB(A)              77                77                   80                  82                   83
5m far                   dB(A)             66,5              66,5                 69,5                71,5                 72,5
10m far                  dB(A)             60,6              60,6                 63,6                65,6                 66,6



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.
MODEL                                    142.F.2            188.F.2             220.F.2              260.F.2             300.F.2
Mean sound pressure level
1m far                    dB(A)             71                71                   74                  76                   77




                         UNICO.C.LNO: Chiller in standard version with LNO kit.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.

MODEL                                    142.F.2            188.F.2             220.F.2              260.F.2             300.F.2
Sound pressure level
1m far                   dB(A)              72                72                   75                  77                   78
5m far                   dB(A)             61,5              61,5                 64,5                66,5                 67,5
10m far                  dB(A)             55,6              55,6                 58,6                60,6                 61,6



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.
MODEL                                    142.F.2            188.F.2             220.F.2              260.F.2             300.F.2
Mean sound pressure level
1m far                    dB(A)             66                66                   69                  71                   72




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     -6-
R407C                                                                                            UNICO.C.STD/ELN “G”
                                                       Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        The units are in compliance with EC 98/37, EC 89/336, EC 73/23, EC 97/23 norms and subsequent
                        modifications.

                        UNICO.C.ELN: Chiller in extremely low noise version.

                        COMPONENTS
                        • Unit base made of epoxy painted galvanized steel sheet profiles and sandwich panel injected with
                          noise and vibration deading material.
                        • Housing made of anodized aluminium profile frame, jointed with reinforced PVC corners and
                          galvanized steel sheet panelling externally coated with PVC film.
                        • Technical compartment, fully enclosed and separate from the air flow, housing compressors,
                          control, electric and regulation devices, to assure working continuity during ordinary service and
                          preventive maintenance operations and to reduce the noise emissions.
                        • Panels and technical compartment insulated by means of special sound deadening materials.
                        • Shell and tube evaporator with one gas circuit for each compressor, steel shell and removable
                          copper tubes, insulated with closed cells polyurethane.
                          The evaporators equipped with flange type hydraulic connection are supplied with counter-flange.
                          The evaporators equipped with Victaulic type hydraulic connection are supplied with solder pipe
                          for the connection with pipe plant.
                        • Double suction centrifugal fans with forward-curved blades, fitted with rubber gasket for fan outlet
                          sealing to the unit structure and equipped with rubber antivibration holders. Each fan is equipped
                          with its own belt driven system with 3 phase 4 poles electric motor, adjustable drive pulley and
                          adjustable fan motor base for belt tightening.
                        • Air exhaustion on condenser coil side.
                        • Condensing coil with wide exchange surface with copper tubes, continuous aluminium finning
                          with aluminium or epoxy painted galvanized steel sheet frame.
                        • Reciprocating semihermetic compressors with built-in electric protection and crankcase electric heater.
                        • Stop valves on compressor discharge.
                        • One additional capacity control step for each compressor.
                        • Spring antivibratin holders for compressor.
                        • Condensing control system with air flow variation through special air damper, installed on the fan
                          outlet, and proportional motor directly driven by the proportional signal managed by MP99
                          microprocessor control, allowing the following operating conditions:
                          - Full load with outdoor temperature from -30°C to +42/44°C.
                          - Partial load (if scheduled) with outdoor temperature up to +46/50°C.
                            Over this limit a safety device stops the unit.
                        • Components for each refrigerant circuit:
                          - Thermostatic expansion valve.
                          - Liquid and moisture indicator.
                          - Electromagnetic valve on the liquid line.
                          - Dryer and anti-acid gas filter.
                          - Stop valves on the liquid line and on the evaporator.
                          - Copper connecting pipings for liquid circuit line.
                          - Copper suction line with vibration absorber joint.
                          - Flexible discharge line.
                          - Flexible pipings for pressure switches connection.
                          - High pressure safety switches.
                          - Pressure transducers, for monitoring, control and limit functions for high and low pressure and
                            oil pressure.
                          - Pump-down stop system.
                          - Refrigerant charge and non-freezing oil charge.
                        • MP99 microprocessor control system.
                        • Temperature sensors on evaporator water inlet and outlet.
                        • IP 54 electric board equipped with:
                          - Quick opening external panel with protective function.
                            Safety internal panel equipped with door lock main switch, microprocessor display and auxiliary
                            controls.
                          - Contactors on each single load.
                          - Magnetothermic switches on each single load (for load with nominal absorption higher than
                            44A, fuses are installed).
                          - Auxiliary circuit and microprocessor feeding by transformer.

                        WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                      -7-
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        UNICO.C.ELN: Chiller in extremely low noise version.

                        OPTIONALS
                        • Noise absorption plenum on fans air discharge, height 750mm for version with air discharge from
                          the top.
                        • Spring antivibration holders (not installed).
                        • Washable metallic air filters with low pressure drops to prevent condensing coil clogging.
                        • Modular metallic nets for condensing coil protection.
                        • Condensing coil with marine alloy fins.
                        • Condensing coil with epoxy coated fins.
                        • Condensing coil with copper fins.
                        • Condensing coil with tin coated copper fins.
                        • Partial heat recovery gas/water heat exchanger.
                        • Total heat recovery gas/water heat exchanger.
                        • Stop vavle on compressor suction line.
                        • Kit for outdoor installation with evaporator antifreeze electric heater.
                        • Air exhaustion from the top (vertical air flow).
                        • Overpressure dampers on fans mouth.
                        • UDT, SQL o ASME VIII Div. 1 approved pressure vessels.
                        • Part-Winding starting system for compressors.
                        • Compressor capacitor for power factor cosϕ 0,9.
                        • Safety flow switch on the water circuit.
                        • Pumping groups equipped with 1 or 2 (working+stand-by) water pumps:
                          - PU pumping group with 2 poles water pumps.
                        • Chilled water tank with antifreeze electric heater.
                        • TR88 system for the management and the local supervision.
                          Through RS485 serial line, every TR88 can manage max. 8 units.
                          More TR88 can be utilized to adequate the control system to the plant units quantity.
                        • MP99 microprocessor accessories:
                          - TV system - Phase-lack control and line voltage displaying.
                          - TA system - Total electric absorption indication.
                          - RC3500 card - RS232C-RS422-RS485 serial line outlet.
                          - RCBUS card - Serial line interface for MODBUS and JBUS communication protocols.
                          - RC3100 "D" "N" cards - Alarms remotization.
                          - Outdoor air temperature sensor.
                          - Electronic flow meter for water flow indication on microprocessor display, supplied not installed
                            (from model 48.E.1 included).




                        WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.

                        RC GROUP reserves the right to accept the matching of the optional installed on the unit.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     -8-
R407C                                                                                              UNICO.C.STD/ELN “G”
                                                         Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        TECHNICAL DATA

                        UNICO.C.ELN: Chiller in extremely low noise version.

MODEL                                          142.F.2                               188.F.2                              220.F.2
SIZE                                              G8                                    G8                                   G8
COOLING CAPACITY (1)      kW                     131                                  165,8                                196,3
COMPRESSORS (1)           n.                       2                                     2                                    2
Power input               kW                     45,7                                  58,5                                 70,3
Absorbed current          A                      75,7                                 100,3                                124,8
Max absorbed current      A                       96                                   131                                  133
Starting current          A                      261                                   343                                  407
FANS                      n.                       6                                     6                                    6
Air flow                  m3/h                  36000                                 38000                                49000
Available static pressure Pa                      50                                    50                                   50
Power input               kW                     4,5                                    4,5                                  6,6
Max absorbed current      A                     11,97                                 11,97                                15,96
EVAPORATOR (1)            n.                       1                                     1                                    1
Water flow                m3/h                   22,5                                  28,4                                 33,7
Pressure drops            kPa                    26,2                                  26,4                                 34,2
Water content             l                       38                                    48                                   54
Max water flow            m3/h                    31                                    41                                   43
GAS CIRCUITS              n.                       2                                     2                                    2
CAPACITY STEPS            n.                       4                                     4                                    4
DESUPERHEATER (2)
Heating capacity          kW                     40,9                                 51,7                                 61,3
Water flow                m3/h                   7,1                                   9                                   10,7
Pressure drops            kPa                    17,4                                 27,9                                 13,7
Water content             l
Max water flow            m3/h                    16                                   16                                  15,6
100% HEAT RECLAIM (2)
Heating capacity          kW                    180,1                                 230,3                                271,5
Water flow                m3/h                  31,5                                  40,3                                 47,5
Pressure drops            kPa                   31,4                                  38,6                                 42,2
Water content             l
Max water flow            m3/h                    56                                   64                                   76
PUMPING GROUP
1 pump group                PU                    3/1                                  4/1                                  4/1
1 pump group                PU-LN                  --                                   --                                   --
2 pumps group               PU                    3/2                                  4/2                                  4/2
2 pumps group               PU-LN                  --                                   --                                   --
DIMENSIONS
Lenght                    mm                     5170                                 5170                                 5170
Width                     mm                     1290                                 1290                                 1290
Height                    mm                     2050                                 2050                                 2050
NET WEIGHT                kg                     2140                                 2300                                 2395
ENERGY EFFICIENCY INDEX (3)
Nominal efficiency        EER                    2,87                                 2,83                                 2,79
Standard capacity steps   IPLV                   4,73                                 4,68                                 4,61
Standard capacity steps   EMPE                   3,73                                 3,68                                 3,63




                        1 Outdoor temperature: 35°C; Chilled water temperature outlet 7°C
                        2 Hot water temperature inlet 40°C.
                        3 IPLV: Energy efficiency index according to ARI STANDARD
                          EMPE: Energy efficiency index according to AICARR
                          For more informations about Energy Efficiency Indexes. please refer to “Energy Efficiency Indexes” bulletin
                          of RC GROUP Technical Literature.

                        SUPPLY VOLTAGE 400/3/50 + Mp
                        On request 230/3/50 - 415/3/50.


RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                        -9-
R407C                                                                                              UNICO.C.STD/ELN “G”
                                                         Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                         ACOUSTIC DATA

                         UNICO.C.ELN: Chiller in extremely low noise version.

                         SOUND PRESSURE LEVEL (LP)
                         Sound pressure level in free field conditions on condenser coil side with ducted air discharge.
MODEL                                          142.F.2                                188.F.2                              220.F.2
Sound pressure level
1m far                   dB(A)                    66                                    67                                    73
5m far                   dB(A)                   54,6                                  55,6                                  61,6
10m far                  dB(A)                   48,8                                  49,8                                  55,8



                         MEAN SOUND PRESSURE LEVEL (LPm)
                         Mean sound pressure level in free field conditions with ducted air discharge, according to ISO 3744
                         norm.
MODEL                                          142.F.2                                188.F.2                              220.F.2
Mean sound pressure level
1m far                    dB(A)                   60                                    61                                    67




                          IMPORTANT
                         For further information about units acoustic data, please refer to “The Noise” bulletin of RC GROUP
                         Technical Literature.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                       - 10 -
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        ELECTRICAL DATA

                        MAXIMUN ELECTRIC ABSORPTION CALCULATION

                        Through this chapter it is possible to calculate the unit maximum electric absorption (A), according
                        to extreme working conditions.

                        The involved components are the following:
                        - Cooling compressors electric motor
                        - Condenser fans electric motor
                        - Water pump electric motor (if present)

                        The electric data of the components are indicated on relative technical data tables.

                        EXAMPLE:
                        Calculation for UNICO.C.STD. 142.F.2 unit with PU 3/1 pumping group:

                        MAXIMUM ELECTRIC ABSORPTION
                        - Compressors               A  96,0 +
                        - Condenser fans (*)        A   8,8 +
                        - Water pump (*)            A   5,3 =
                        Maximum electric absorption A 110,1


                        To obtain the unit electric absorption values with different feeding voltage, please refer to the
                        following coefficients:


                              Feeding voltage                      Coefficient
                                 230.3.50                            1,73
                                 415.3.50                            0,97




                        IMPORTANT
                        For water pumps and condenser fans, the values of the nominal electric absorption have been
                        assumed to be same as plate current ones.
                        In the normal operation the electric absorption is lower than the plate current.
                        These values depend on the operating conditions of the unit and control of the system.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                    - 11 -
R407C                                                                                                                                            UNICO.C.STD/ELN “G”
                                                                               Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                                          FANS PERFORMANCE


HOW TO READ THE DIAGRAMS                                                                                                            Reference curve
                                                                                                                        Unit pressure drops + Dynamic pressure
                                                         Fan absorbed power
                                                                                                                         3                          1000 (RPM)
                     (Pa) 700
                                                                                                             2
                              600                                                           1,5                                          3          900
                                                                                                                                         2
                              500                                              1
                                                                                                                                         1          800

                                                                           0,8
                              400                                                                                                            4

                                                                         0,6
                                                                                                        C                                           700
                              300                                                                                                                 660
                                                                   0,4
                                                                                                                                        30          600
             Total pressure




                                                                 0,3




                                                                                                                                                          Fan speed
                              200                                                                                                  25
                                                      (kW) 0,2
                                                                                                   B                                                500
                                    163

                              150
                                                                                                                              20

                                                                                                                         18
                                                                                                   A




                                                                                                                                                                      Relative sound pressure level
                                    113
                                                                                                                                                    400
                              100
                                                                                                                  15
                              90
                                                                                                                 13,5
                              80

                               70
                                                                                    5                                                               300
                                                                                              10
                               60
                                                                       0 dB(A)
                               50
                               45

                                                                                                       6,5
                                                   1,5     2       2,5     3       4        5      6         7    8 9 10                18       (m3/h x 1.000)
                                                                                   Air flow

                                          EXAMPLE:
                                          Unit with nominal air flow of 13.000 m3/h and total pressure 300 Pa.
                                          - Air flow 13.000 m3/h (2 fans x 6.500 m3/h each).
                                          - Unit reference curve = 1.
                                          - Point A. Curve 1 indicates the unit pressure drops + the fan dynamic pressure for total 113 Pa.
                                          - Point B. Standard unit working point with 50 Pa of available pressure for total pressure 163 Pa.
                                          - Point C. Unit working point with 187 Pa of available pressure (see example). Total pressure
                                            113+187=300 Pa.

                                          At the above conditions the following result will be achieved:
                                          - Fan speed 660 RPM.
                                          - Engaged power by each fan 0,8kW. Considering 10% margin one 1,1 Kw motor for each fan is
                                            installed.
                                          - Considering the nominal value, the sound pressure level will increase of the difference between
                                            two working points.
                                            At point B (nominal conditions) correspond 13,5 dB(A), at point C 18 dB(A).
                                            Therefore, 18-13,5=4,5 dB(A), value to be added to the nominal one indicated in technical data
                                            sheet 66+4,5=70,5 dB(A).



RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                                             - 12 -
R407C                                                                                                       UNICO.C.STD/ELN “G”
                                                             Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

FANS PERFORMANCES



                                                                                              3                         1000 (RPM)
         (Pa) 700
                                                                                    2
               600                                                        1,5                                           900
                                                                                                            3
                                                                                                            2
               500                                         1
                                                                                                            1           800

                                                       0,8                                                      5
               400                                                                                               4
                                                     0,6
                                                                                                                        700
               300
                                               0,4
                                                                                                            30          600
                                             0,3

               200                                                                                     25
                                 (kW) 0,2
                                                                                                                        500
               150
                                                                                                  20



                                                                                                                        400
               100
                                                                                         15
                90

                80

                70
                                                                  5                                                     300
                                                                          10
                60
                                                   0 dB(A)
                50
                45


                              1,5        2     2,5     3         4        5     6   7   8 9 10              18       (m3/h x 1.000)



UNICO.C.STD
MODELLO                                                        142.F2                              188.F2
Curva di riferimento                                             2                                   3




UNICO.C.ELN
MODELLO                                            142.F.2                          188.F.2                           220.F.2
Curva di riferimento                                  3                                3                                 3




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                           - 13 -
R407C                                                                                                         UNICO.C.STD/ELN “G”
                                                                 Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

FANS PERFORMANCES




        (Pa) 700                                                                   3                                     900 (RPM)

            600                                                     2                                                    800


            500                                              1,5                                                         700
                                                                                                          2
                                                                                                          1
            400                                          1
                                                                                                                         600
                                                   0,8

            300
                                             0,6                                                               25


                                                                                                                         500
                                       0,4
            200                                                                                          20

                                 0,3

            150                                                                                  15                      400
                      (kW) 0,2


                                                                                          10
            100
             90                                                            5
                                                         0 dB(A)                                                         300
             80


                           3            4      5             6      7       8    9 10            15           20    (m3/h x 1000)




UNICO.C.STD
MODEL                                               220.F.2                                    260.F.2                             300.F.2
Reference curve                                        1                                          2                                   2




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                                  - 14 -
R407C                                                                                                          UNICO.C.STD/ELN “G”
                                                                    Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                               OPTIONAL

                               CHILLED WATER TANKS
                               Available for all air cooled liquid chillers.
                               This optional is made by 2 insulated water tanks, closed in a galvanized steel sheet box and painted.
                               The tank is supplied assembled under the unit, ready to work and with antifreeze electric heater.



CHILLER SIZE                                                                    G7                                    G8
Capacity                                 l                                      530                                   770
Water inlet                              Ø                                    3" MPT                                 DN100
Water discharge                          Ø MPT                                  1/2"                                  1/2”
Air discharge                            Ø MPT                                  1/2"                                  1/2”
Empty weight                             kg                                     390                                   570
Dimensions
                               A         mm                                      1.290                                1.290
                               B         mm                                      1.380                                1.410
                               C         mm                                      1.520                                1.630
                               D         mm                                       200                                  585
                               E         mm                                      3.600                                5.170
                               F         mm                                       100                                  135
                               G         mm                                      1.600                                2.000
Fixing holes                   5         N° x Ø mm                               6x20                                 6x20



CHILLED WATER TANKS



                                                      2
                                                      3
                                                      1
                                                      4
                                           350


                                                    300
                                                   195
                                                          50




         50    5           5       50                             D                      G                            G                  D
                       A
                                                                F         5                                5                            5
                   B
                   C                                                                                   E




                               1.   Water inlet.
                               2.   Water outlet. For exact position see the drawing of the chiller.
                               3.   Pipe for air discharge.
                               4.   Pipe for water drain.
                               5.   Fixing holes.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                                  - 15 -
R407C                                                                                              UNICO.C.STD/ELN “G”
                                                         Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        TOTAL HEAT RECLAIM
                        The system is totally controlled by the microprocessor.
                        The heat reclaim exchangers are installed on every gas circuit of the unit in parallel to the main
                        condenser.
                        The ON-OFF heat reclaim system’s operation is subject to the supply demand of cooling capacity.
                        The heat reclaim device is controlled by a probe placed on the water inlet of the heat reclaim
                        exchangers which senses the water temperature coming from the plant and by a temperature
                        differential which can be calibrated on the microprocessor.
                        In the heat reclaim phase, a special valve which is fitted on the delivery pipeline deviates the gas
                        towards the heat reclaim exchanger totally excluding the air cooled main condenser.
                        In case of an anomalous condensing pressure rise which is caused, for example, by the absence
                        of the hot water flow reclaim, the refrigerant gas is deviated on the main air cooled exchanger to
                        guarantee the chilled water supply.
                        If this inconvenience verifies more than three times in a certain time interval, the microprocessor
                        disconnects the heat reclaim system and shows the anomaly by using an alarm on the display; this
                        alarm is also available on voltage free contacts.
                        In the units with a double refrigerant circuits, the heat reclaim hydraulic circuit is in parallel connected
                        and the water temperature probe is already installed.
                        A special anti-freeze heater avoids water freezing in case of a flow absence and/or in the periods
                        of work suspension in winter season.
                        In this series, welded plate heat exchangers in stainless steel AISI 316 are used.
                        It is also possible to remote-control the connection or the disconnection of the total heat reclaim
                        system thanks to the presence of special contacts on the electric box of the unit.




TOTAL HEAT RECLAIM


                                             HEAT RECLAIM HYDRAULIC CIRCUIT




                                       BGV                                      YR
                                                    SC




                                                     A
                                      RU

                                                                                YR
                                         COM
                                                            B




                              SUCTION LINE                               TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        YR     Non return valve
                        A      Gas/air heat exchanger
                        B      Fan
                        SC     Heat reclaim exchanger
                        BGV    Deviating valve




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                          - 16 -
R407C                                                                                             UNICO.C.STD/ELN “G”
                                                        Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        OPTIONAL

                        CONDENSING HEAT RECLAIM SYSTEMS

                        PARTIAL HEAT RECLAIM (desuperheaters)
                        The partial heat reclaim exchangers are installed on every refrigerant circuit of the unit before the
                        main condenser.
                        The system is not regulated.
                        In the units with double refrigerant circuit, the heat reclaim hydraulic circuit is in parallel connected.
                        A special antifreeze heater avoids water freezing in case of a flow absence and/or in the periods of
                        work suspension in winter season.
                        Welded plate heat exchangers in stainless steel AISI 316 are used.
                        The heating capacity which is supplied depends on the kind of refrigerant gas which is used and on
                        working temperatures.
                        Desuperheaters can produce hot water up to the maximum temperature of 70÷75°C and according
                        to the working conditions of the unit.



PARTIAL HEAT RECLAIM




                               HEAT RECLAIM HYDRAULIC CIRCUIT


                                               SC                    A




                                          RU                             B



                                             COM




                                 SUCTION LINE                                    TO LIQUID RECEIVER




                        COM    Compressor
                        RU     Manual valve
                        SC     Heat reclaim exchanger
                        A      Gas/air heat exchanger
                        B      Fan




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                      - 17 -
R407C                                                                                                 UNICO.C.STD/ELN “G”
                                                            Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                            OPTIONAL

                            PUMPING GROUPS

                            In the chillers technical data tables are showed the pumping group type for each unit.
                            The pumping group are factory assembled inside of the unit and they don't modify the water chiller
                            dimensions. The piping line is insulated with closed cell polyurethane foam.

                            ONE PUMP VERSION - PU.../1
                            Pumping group with one centrifugal pump.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.

                            TWO PUMPS VERSION - PU.../2
                            Pumping group with two centrifugal pumps. One pump is working and the other is in stand-by.
                            Automatic changeover is made in case of failure.
                            COMPONENTS
                            - Control and working electric equipment built in the water chiller electric board and directly
                              managed by the microprocessor control.
                            - Expansion tank.
                            - Safety valve on the water circuit.
                            - 2 poles electric motor.
                            - Ball valves.
                            - Non return valves.
                            - Water safety flow switch (one for each pump).
                            - Water pressure gauges.

1 pump version                                              PU3/1                                    PU4/1
2 pumps version                                             PU3/2                                    PU4/2
Min. water flow             m3/h                             15                                       30
Max water flow              m3/h                             30                                       55
Total pressure
With min. water flow        kPa                              225                                      235
With max. water flow        kPa                              175                                      185
Installed power (1)         kW                               2,2                                       4
Plate current (1)           A                                5,3                                      9,6
Net weight ../1             kg                                74                                      112
Net weight ../2             kg                               112                                      164
Sound pressure level (2)    dB(A)                            70                                        72
(1) The given value is referred to the woring pump only.
(2) Sound pressure level 1m far in free field conditions.


PUMPING GROUP SCHEME


                                      PU.../1                                                   PU.../2
                       VE                                                       VE
                MA            YS                            MA            MA           YS                               MA




                                                   FL                                                        FL
                                        P                                                        P
                                                                                        RU              YR         RU



                                                                                                             FL
                                                                                                 P
                            MA Manometer                                                RU              YR         RU
                            VE Expansion tank
                            YS safety valve
                            RU Manual ball valve
                            P Water pump
                            YR Non return valve
                            FL Water flow switch



RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                           - 18 -
R407C                                                                                           UNICO.C.STD/ELN “G”
                                                      Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        OPTIONAL

                        SILENCING PLENUM ON CONDENSER AIR DISCHARGE

                        Supplied as separate accessory for installation at site.
                        Same characteristics as the cabinet of the chiller, the plenum is supplied with built-in weatherproof
                        noise absorption partitions.
                        Thanks to the particular disposition of the noise absorption partitions, the air pressure drop across
                        the plenum is zero.

                        NOISE LEVEL REDUCTION
                        The RC GROUP catalogues show the chillers noise pressure level on gas/air heat exchanger side.
                        The noise pressure level on fans air discharge is always higher.
                        With the plenum it is possible to reach, on fans air discharge side, a noise pressure level value of
                        -3dB(A) lower than the nominal one (on gas/air heat exchanger side), for all the chillers.
                        The plenum reduces only the noise level on fan air discharge side. No noise level reduction on the
                        other unit sides.

                        Example: Noise level 1m far on gas/air heat exchanger side in free field conditions for chiller
                                 UNICO.C.STD.142.F.2 = 72 dB(A).
                                 Unit noise level 1m far on fans air discharge side in free field conditions: 72-3 = 69 dB(A).




SILENCING PLENUM ON AIR DISCHARGE
                                               750




                        Chiller size                       G7                   G8
                        Weight                kg           150                  200




                        WARNING
                        The units are fitted with double air circuit from size G7 included.
                        The condenser air discharge ducting must have a partition.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                     - 19 -
R407C                                                                                                   UNICO.C.STD/ELN “G”
                                                              Air cooled liquid chillers with reciprocating compressors and centrifugsl fans

                        OPTIONAL

                        SPRING ANTIVIBRATION HOLDERS

                        Available on request for all liquid chillers.
                        They are not installed on the chiller but supplied separately.
                        The antivibration holders type and the positioning layout are showed in a specific drawing supplied
                        with the chiller.
                        The holders must be utilized only to eliminate the vibrations produced by the chiller.


SPRING ANTIVIBRATION HOLDERS

Type                                        C...                                       R...                             G...
                                           Light                                     Medium                            Heavy
AxB                     mm                 Ø124                                      114x174                          208x208
C                       mm                  90                                         90                               122




                                    1
                                    2
                                    3
                                    4
                                    5
                                    5
                                    4
                                    6
                                    7
                                                                                                               C




                                                                     AxB


                        1.   Chiller frame.
                        2.   Hole for wrench.
                        3.   Screw-jack for unit levelling.
                        4.   Height setting nuts.
                        5.   Washers.
                        6.   Antivibration holder.
                        7.   Base.




RC GROUP S.p.A. - UNCRCP_CG_GB407_0203                            - 20 -

				
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