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					SATS FLAiR Series
1.5 - 5 Ton "FCS" Floor Mounted Precision Control Air Conditioners Product Guide Specification *************************************************************************************************************** This section must be carefully reviewed and edited by the Engineer to meet the requirements of the specific project. Coordinate with other specification sections and the drawings as necessary. *************************************************************************************************************** 1.1 Summary This specification describes requirements for a precision environmental control system. The FLAiR “FCS” floor-mounted air conditioning system shall provide precision temperature and/or humidity control for computer rooms or rooms containing telecommunications or other highlysensitive heat load equipment where continuous 24 hour a day, 365 days a year air conditioning is required. The units are designed with a wide range of options to handle both precision and comfort cooling applications. The supplied system shall be labeled in accordance to UL 1995 Standard, and MEA NYC approved (MEA-163-88-E) (CSA if applicable) listings. The system model number shall be ________________________. 1.2 DESIGN REQUIREMENTS The environmental control system shall be an SATS FLAiR factory-assembled unit. The unit shall be designed for corner installation, requiring front only access through a hinged and removable front access panel. The electric box shall hinge outward allowing for front only access to all components. No allowance for side service access shall be required, however removable side access panels shall be provided for additional access. On direct expansion models, the refrigeration system shall be split with a matching outdoor air-cooled condenser, or with the compressor located in a remote or close-coupled condensing unit. The evaporator section shall be specifically designed for high sensible heat ratio. The heat exchanger shall be propeller fan (for outdoor installation) or centrifugal fan (for indoor installation). Each system shall be capable of handling _______CFM (CMH) at ________inches (mm) of water external static pressure with (up discharge front return air flow, down discharge top return air flow, up discharge rear return air flow pattern. The unit shall have the cooling capacity of ________ Btu/hr (kW) and the sensible cooling capacity of ________Btu/hr (kW), based on entering air condition of ___________°F (°C) dry bulb and _______°F (°C) wet bulb. The humidifier shall have the capacity of __________lb/hr (kg/hr.). Reheat shall have a capacity of ________ Btu/hr (kW). The main fan motor(s) shall be ______HP (kW). The unit shall have a power supply of ________ volts, ________ phase, ______Hz. 2.0 PRODUCT 2.1 Cabinet and Frame Construction

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QG-FQS0045 Rev Page 1 of 10

The cabinet and access panels shall be fabricated from 16 gauge galvanized steel and painted with a 2-ply epoxy finish to match and provide corrosion protection. The panels shall be lined with 1/2" (13 mm), 2 lb (.90 kg), high-density sound and thermal insulation and sealed with selfextinguishing gasketing conforming to NFPA 90A and 90B. The main unit color shall be ____________________. 2.2 Electric System 2.2.1 Modular Motor Controllers

The systems shall incorporate modular motor controllers utilizing motor start protectors and circuit breakers to eliminate the need for fuses. All wiring shall be in accordance with the National Electric Code (NEC) and shall include: * Motor branch circuit short circuit protection; * Motor load switching controllers (contactors) and * Motor overload protection. The control circuit shall be a 24 VAC Class II low voltage circuit, including primary and secondary circuit protection. Low voltage, high voltage, and common wires shall be color-coded and shall be individually numbered at each end for ease of service tracing. All wiring shall be in accordance with the National Electric Code (NEC). 2.2.2 Remote Stop / Start Contacts

Included in the system’s electrical control circuit shall be a 2 –pin terminal connection for remote stop/start of the FLAiR air conditioner by remote source. 2.2.3 Main Power-Electric Non-Fused Disconnect Switch

The unit mounted main power disconnect switch factory provided, is as standard. The disconnect switch shall be dust-proof, non-fused type with a lockable handle. 2.3 Direct Expansion System 2.3.1 Coils The system shall be configured for a draw-thru air pattern to provide uniform air distribution over the coil face. The coils shall be designed to provide maximum coil surface area and minimum depth to provide a high sensible cooling capacity. The coils shall be seamless drawn copper tubes, mechanically bonded to tempered aluminum fins with a raised lanced fin design for maximum heat transfer. Coil end plates shall be hot dipped galvanized steel. The evaporator coil shall be mounted in an insulated UL-94-V-O polymeric or stainless steel condensate drain, depending upon FCS model size The evaporator coil shall have a _______ft² (m²) face area and be _______rows deep. It shall be constructed of copper tubes and aluminum fins and have a maximum face velocity of ______ft/min (m/s) at _______CFM (CMH). Refrigerant flow shall be controlled by an externally equalized thermostatic expansion valve.

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2.3.2 Refrigeration System All refrigerant piping shall be refrigerant grade tubing. Each refrigeration circuit shall include, as a minimum a refrigerant drier/strainer sight glass with moisture detector, a thermal expansion valve with rapid bleed port feature and external equalizer, an evaporator coil, a compressor, a high pressure switch with manual reset, and a low pressure switch with automatic reset. Split/Remote systems shall have a liquid line solenoid for refrigerant isolation to prevent liquid slugging. All high-pressure joints shall be brazed, and the entire system shall be pressure tested at the factory with dry nitrogen, evacuated to at least 50 microns and fully charged with refrigerant. 2.3.3 Scroll Compressor The compressor shall be high efficiency, high reliability and low noise scroll compressor(s). The compressor shall be complete with charging and service shraeder ports, internal vibration isolation, internal thermal overloads, an internal pressure relief valve, an internal discharge gas vibration eliminator, and external vibration mounting isolation. 2.4 2.4.1 Fan Section Direct-Driven Systems (Models FCS-018/060)

The blower(s) shall be direct-driven with double-width, double-inlet housing and forward-curved blades. The blower(s) shall be dynamically and statically balanced to minimize vibration and operate in the Class 1 range. The blower(s) shall be corrosion protected with a painted housing and impeller wheel. The three-speed (208V) evaporator motor shall be factory wired for the correct speed to produce the specified air quantity. The blower motor shall have internal overload protection. (277 and 460V direct-drive motors shall be two-speed.) The fan motor shall be ___________hp (kW) at 1075 rpm. 2.5 Temperature and Humidity Control

The standard FLAiR “FCS” floor A/C includes the A-TECH-20 Microprocessor Controller, and Dehumidification Mode with Electric Reheat/ Heat providing precision temperature and humidity control. 2.5.1 A-Tech-20 Microprocessor Temperature & Humidity Controller with Alarms

This controller shall incorporate a “user-friendly” operating environmental to allow easy system setup and operation. The control system shall monitor unit operation and activate audible and visual alarms in the event of the following factory preset alarm conditions: * * * * * * High temperature Low temperature High humidity Low humidity High head pressure Loss of air flow

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* Leak Detection; and * Dirty filter. Unit Status Display shall be available for:    Current Dry Bulb Temperature Set Point Current Relative Humidity Set Point Current Unit Status: Unit ON/OFF, Power ON, Cooling, Humidifying, Dehumidifying, Reheating and/or Heating…etc. Actual Room DB Temperature Actual Room Relative Humidity

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More Standard A-TECH-20 Features:      2.6.

Selectable Automatic or Manual Restart with non-volatile memory for "last" stored setting recall Keypad lock-out feature to prevent unauthorized tampering Common alarm dry-contact connection for remote BMS communication Time Clock for Night Set-Back Built-in short cycle protection Humidity Control

2.6.1 Canister Steam Humidification The humidifier shall be an electrode steam canister type and shall have an adjustable humidity output setting from 25 to 100% of the full rated humidifier capacity. The humidifier shall have an automatic flush cycle that senses the current consumption of the humidifier and controls mineral concentration of the water. A “Change Cylinder” light shall notify service personnel when the humidification output is below rated requirements and when maintenance is due. 2.7 Dehumidification Cycle The floor A/C shall provide refrigeration-based dehumidification mode. Moisture is condensed on the cooling coil and discharged through the condensate drain. Reheat (electric, hot gas, steam, or hot water) shall be provided to offset sensible cooling during the dehumidification cycle. 2.7.1 Electric Reheat A factory mounted and wired low-watt density, nichrome-wire electric resistance heater shall be included to provide automatic sensible re-heating as required during the dehumidification cycle and automatic heating mode. Electric heaters shall be provided with miniature thermal/magnetic circuit breakers, which shall protect each ungrounded conductor. Also included will be one automatic reset and one manual reset over-temperature safety device (pilot duty). 2.8 Air Pattern

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2.8.1

Top Discharge Grille with: * Front “Free” Return;

2.9

Filter Chamber

The filter chamber shall be an integral part of the unit, located within the cabinet and serviceable from the front of the unit. The A/C shall have a slide out, 1" deep, class 2 (per U.L. Standard 900) filter. The filter shall be easily accessed through the front, hinged access door. 2.10 Standard Features / Individual Systems

2.10.1 Air Cooled The air-cooled system shall consist of the following: 1. Split air cooled with remote outdoor condenser; 2. Split air cooled with remote indoor centrifugal-type condenser; 3. Split air handling unit with remote outdoor propeller-type condensing unit; or 4. Split air-handling unit with remote indoor centrifugal-type condensing unit. 2.10.1.1 Remote Outdoor Propeller Condenser The system shall be a remote outdoor air cooled condenser with direct-driven propeller fan(s). The condenser cabinet shall be of aluminum construction and contain copper tubes and aluminum fins. The condenser cabinet shall house the condenser coil, direct-drive propeller fan(s) and TEFC fan motor(s), and NEMA 3R condenser motor control/enabling box. The compressor(s) shall be located with the FCS-( )-AR evaporator section. The condenser shall be sized to provide the total heat rejection of the system at 95°F ambient temperature for the corresponding model FCS-( )-AR FLAiR evaporator unit. The following head pressure control features are offered: * HES-( )-LAA (012 to 060): Low Ambient Head Pressure Control down to a minimum ambient temperature of 0°F via fan cycling head pressure control. * HES-( )-LSA (042 to 060): Low ambient head pressure control down to a minimum ambient temperature of -20°F via variable fan speed head pressure control. * HES-( )-LFA (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of -30°F via flooded head pressure control. 2.10.1.2 Remote Indoor Centrifugal Condenser The system shall be a remote indoor, ceiling mounted, air cooled condenser with centrifugal blower. The condenser cabinet shall be of aluminum construction and contain copper tubes and aluminum fins. The condenser cabinet shall house the condenser coil, blower and blower motor, receivers (if applicable), and condenser motor control/enabling box. The compressor(s) shall be located with the FCS-( )-AR evaporator section. The condenser shall be sized to provide the total

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heat rejection of the system at 95°F ambient temperature for the corresponding model FCS-( )AR evaporator unit. The following head pressure control features are offered. * HES-( )-CAA (012 to 036): Low ambient head pressure control down to a minimum ambient temperature of 0°F via fan cycling/speed head pressure control. * HES-( )-CAA (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of -30°F via flooded head pressure control.

2.10.1.3 Split air handling unit with remote outdoor propeller type condensing unit The system shall be an outdoor, remote air cooled condensing unit with direct-driven, propeller fan(s). The system’s compressor shall be located with the remote condensing unit section. The condensing unit cabinet shall be of aluminum construction and contain copper tubes and aluminum fins. The condensing unit cabinet shall house the condenser coil, compressor(s), direct-drive propeller fan(s) and TEFC fan motor(s), and a NEMA 3R condenser motor control/enabling box. The condensing unit shall be sized to provide the total heat rejection of the system at 95°F ambient temperatures for the corresponding model FCS-( )-AHU FLAiR air handling unit. The following head pressure control features are offered. * SCO-( )-H22 (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of 0°F via fan cycling head pressure control. * SLO-( )-H22 (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of -30°F via flooded head pressure control.

2.10.1.4 Split air handling unit with remote indoor centrifugal type condensing unit The system shall be indoor, ceiling mounted, remote air cooled condensing unit with centrifugal blower. The condensing unit cabinet shall be of aluminum construction with copper tubes and aluminum fins condenser coil. The condensing unit cabinet shall house the condenser coil, compressor(s), blower and blower motor, receivers (if applicable), and condenser motor control/enabling box. The condenser shall be sized to provide the total heat rejection of the system at 95°F ambient temperature for the corresponding model FCS-( )-AHU FLAiRair handling unit. The following head pressure control features are offered: * OHS-( )-RCU-I (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of 0°F via fan cycling head pressure control. * OHS-( )-RCU-I (012 to 060): Low ambient head pressure control down to a minimum ambient temperature of -30°F via flooded head pressure control. 2.11 Water Cooled Systems 2.11.1 Integral Coaxial Water Condensers

The water-cooled condenser shall be an integral coaxial type with a factory installed head pressure water-regulating valve. The unit shall have a total heat of rejection of _________Btu/hr

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QG-FQS0045 Rev Page 6 of 10

(kW), require _______gpm (l/s) of ____________°F (°C) water, and have a maximum pressure drop of _________ft. (kpa.) 2.11.2 Head Pressure Control Each refrigerant circuit’s head pressure shall be controlled by a factory-installed two-way water regulating valve rated for 150 psig. w.w.p. 2.12 Glycol-Cooled Systems

2.12.1 Integral Coaxial Glycol Condensers The glycol cooled condenser shall be an integral coaxial type with a factory-installed head pressure glycol regulating valve. The unit shall have total heat of rejection _________Btu/hr (kW), require _______gpm (l/s) of _________°F (°C) water, and have a maximum pressure drop of __________ft. (kpa.) 2.12.2 Head Pressure Control Each refrigerant circuit’s head pressure shall be controlled by a factory installed two-way glycol regulating valve rated for 150 psig. w.w.p. 2.13 Drycooler

Drycooler casings shall be fabricated from heavy aluminum for corrosion protection and appearance. The aluminum also reduces the weight of the drycooler to reduce roof loading and shipping costs. Structure components shall be fabricated from galvanized steel for support. Motors shall be permanently lubricated ball bearings and be internally protected. The fan blades shall be made from aluminum and have zinc plated hubs for strength and corrosion protection. Multiple drycoolers shall have internal air baffles to prevent air bypass from one fan section to another and to maximize air through each coil section. The drycooler shall be designed for ________°F (°C) ambient. 2.14 Glycol Pump Package

The pump packages are available as single pump or dual automatically redundant pump packages. The system shall be mounted on an aluminum angle chassis and be protected by a removable aluminum cover. The controls shall be mounted in a NEMA-4 enclosure at the end of the pump package.. The pump packages shall include, but not be limited to: * Pump starter(s)/contactor(s) with fusing per NEC; * Aquastat(s) to sense the coolant temperature and controls to cycle the drycooler fan(s) to maintain the coolant temperature; * A 15 gallon expansion tank; * An airtrol fitting (automatic air bleed valve); * A single point main power connection for pump and drycooler. The pump shall be sized to provide _____ gpm _____ l/s (total system flow rate) at ______ft._______(kpa) of head. The glycol shall be _____% Ethylene / Propylene glycol solution.

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2.15

Chilled Water System Components

2.15.1 Chilled Water Cooling Coil The cooling coil shall have a ____________ft (m ) face area and be 4 rows deep. The coil shall be constructed of seamless drawn copper tubes, mechanically bonded to tempered aluminum fins with a raised lance fin design for maximum heat transfer, and mounted in a stainless steel condensate drain pan. The coil shall be designed for under 500 ft/min face velocity. The water circuit shall be designed to distribute water into the entire coil face area. The coil shall be supplied with _____°F (°C) entering water temperature with a __________°F (°C) rise. The coil shall be supplied with _________gpm (l/s) of chilled water and pressure drop shall not exceed ______psi (kpa). 2.15.2 Chilled Water Control The water circuit shall include a two-way slow close motorized valve. Design pressure shall be 150 psig (1035 kpa) two-way or three-way 250 psig (1724 kpa) shall be provided as an option. 2.16 Optional Equipment / All Systems
2 2

2.16.1 Remote Mounted A-Tech-20 Controller Display Remote mounting of the A-Tech-20 key pad display is optional. A 30 ft. interconnecting communications cable with easy plug-in end connectors shall be factory provided standard with remote A-Tech-20 display option. 2.16.2 A-Tech-1.1 The A-Tech-1.1 is available as a cost savings alternative to the A-Tech-20 for those non critical applications requiring temperature (cooling/heating) only control and no humidity control. The FLAiR Series floor mounted A/C shall be provided with SATS “slimline”, ultra-thin profile, 1-stage cool/1-stage heat, unit or remote wall-mounted programmable digital microprocessor based controller. 2.16.6 Head Pressure Control ( Low Ambient Control) AIR COOLED – Low Ambient 0°F, Fan Cycling / Fan Speed The air cooled system shall incorporate a low ambient fan cycling/fan speed head pressure control for year-round A/C system operation down to 0°F DB minimum ambient air temperature. -20°F, Variable Speed Control (Model HES-()-LSA Condenser) The air cooled system shall incorporate a low ambient variable speed fan head pressure control for year-round A/C system operation down to -20°F DB minimum ambient air temperature.

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QG-FQS0045 Rev Page 8 of 10

-30°F, Flooded Control The air cooled system shall incorporate a low ambient flooded head pressure control for yearround A/C system operation down to -30°F DB minimum ambient air temperature. This option shall include a factory installed crankcase heater, cold-start relay, liquid refrigerant receiver with receiver liquid level sight glass and head pressure regulating valve for flooded condenser option. 2.16.7 Water / Glycol Systems Two-Way, 350 psig Regulating Valve Each refrigerant circuit’s head pressure shall be controlled by a factory installed, High Pressure two-way water /glycol regulating valve rated for 350 psig. w.w.p.

Three-Way, Head Pressure Regulating Valve Each refrigerant circuit’s head pressure shall be controlled by a factory supplied and field installed: * 3-Way, 150 psig w.w.p. head pressure valve: or * 3-Way, 350 psig w.w.p. head pressure valve.

2.17

DX - Capacity Modulation/Freeze -Protection

2.17.1 Snap-Acting, Hot Gas Bypass (Models Available FCS-( )-AR, W & G) The FLAiR floor A/C units shall incorporate a hot gas bypass system to provide modulation of the unit’s cooling capacity. This options shall also provide evaporator coil freeze protection under low load conditions. The Snap-Acting system is only available on those systems where the compressor is located in the evaporator section. 2.17.2 Modulating Chilled Water Control Valves  2-Way, 250 psig w.w.p. chilled water modulating valve shall be factory piped and wired. The valve shall automatically meter the flow of chilled water to the cooling coil in response to a proportional signal (typically 0-10 VDC) provided to the valve by the A-Tech-20 proportional controller. 3-Way, 250 psig w.w.p. chilled water modulating valve shall be factory piped and wired. The valve shall automatically meter the flow of chilled water to the cooling coil in response to a proportional signal (typically 0-10 VDC) provided to the valve by the A-Tech-20 proportional controller. If the cooling demand] falls below the system’s maximum cooling capacity, the superfluous coolant shall be diverted back to the chilled water source. 3-Way, 150 psig w.w.p. chilled water slow-close motorized valve shall be factory piped and wired. Accessories

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2.18

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QG-FQS0045 Rev Page 9 of 10

2.18.1 Condensate Pump The condensate pump shall have the capacity of ______gpm (l/s) at _______ft (kpa) of head. The condensate pump shall be specifically designed to operate with the higher condensate temperatures caused by the flush and drain cycle of the electrode canister humdifiers. 2.18.2 Smoke Detection An ionized smoke detector shall be factory installed and wired in the evaporator section of the suction side of the evaporator blower. The air conditioner will shut down upon sensing smoke in the return air stream. 2.18.3 Firestat The air conditioner shall be provided with a factory wired and mounted firestat. The firestat will shut down the air conditioner upon sensing a high return air temperature. 2.18.4 Remote Water Detector A remote single point water/leak detector shall be included to provide additional safety to the standard condensate pan safety floats. Upon sensing a water leak, the normally closed water detector control circuit opens, which will cause the air conditioner to shut down.

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