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APP-006 Home Load Manager Installation







Micro Control Systems

APPLICATION NOTE

APP-006

5400-1 Division Drive

Ft. Myers, FL 33905 USA

(941)-694-0089

Fax (941) 694-0031









HOME LOAD MANAGER

INSTALLATION MANUAL

Hardware Revision 1.4 & Higher









Revision History

Date Author Description



03/01/97 John Walterick Created Application Note.

08/01/97 John Walterick Revised Application Note.









APP-006 Home Load Manager Installation 1

APP-006 Home Load Manager Installation





MCS-8 & MCS-I/O INSTALLATION

You may have one MCS-8 and up to three MCS-I/O units on and installation. Figure 1

indicates the preferred mounting for & MCS-8 and one MCS-I/O unit providing a total of

16 outputs, 16 inputs and 2 analog outputs.



Incoming Power

from

L/N/G Circuit Breaker

DISPLAY Box



MCS-8









L/N/G









MCS-

I/O#1







Figure 1









What’s Important



1. MCS units must be located in a Dry area with access to a separate 120

volt (VAC) power source. A good location is near the circuit breaker panel

or in a utility room.

2. Line, neutral and ground to MCS units need to be wired to the same

source. Only one set of 120 VAC wires should be on the 120 vac input

terminals of each unit. (i.e. wire from the circuit breaker to each unit.)

3. There should be no connection between neutral and earth ground.

4. The MCS-8 display should be mounted at or slightly above eye level.

(6 o’clock viewing angle)









APP-006 Home Load Manager Installation 2

APP-006 Home Load Manager Installation





MCS SENSOR INSTALLATION

Sensors are be divided into five categories as follows:



1. Temperature and Pressure sensors, purchased from MCS, have a shielded cable

correctly wired at the sensor end. They can be purchased with different lengths of

cable to eliminate splicing during field installation.



1.1. Figure 2 below shows the correct wiring of the T100 cable to the MCS controller.





What’s Important



1. The MCS-T100 is constructed with the ground

drain open within the sensor.

2. The ground drain is tied to the MCS SI

(Sensor Input) on the ground terminal.

3. See Quick Reference Sheets for transducers

& specific connection to 3 or 4 wire SI’s.



+5 GND S1









MCS-T100 M

C





1.2. MCS-Eclipse pressure sensor – The figure below shows the correct wiring of

the Eclipse pressure sensor.







+5 GND S1

RED BLK WH or CLEAR



Shielded cable - (20’ or 40’ 22 awg supplied)









APP-006 Home Load Manager Installation 3

APP-006 Home Load Manager Installation





2. Printed circuit board sensors, purchased from MCS, which require field wiring

using shielded cable. These would include the MCS-HUMD, MCS-ZONE, MCS-

AMP-CT, etc.. The figure below shows the correct wiring for a zone sensor.

What’s Important



1. The MCS-ZONE is wired in the field. Two wire

shielded cable must be used. (20 - 24 gauge

stranded shielded cable)

2. The ground drain is tied only to the MCS SI on the

ground terminal. (Not on the ZONE END

connection)

3. See Quick Reference Sheets for other boards &

+5 GND S1 specific connection to 3 or 4 wire SI’s.









MCS-ZONE





3. Dry contact inputs which are supplied from another source. (Inputs from Meter

Pulse, Security (door / window open), etc.) The figure below shows the correct

wiring for dry contact inputs.



What’s Important



1. The Dry Contact is wired in the field.

2. The ground drain is tied only to the MCS SI on the

ground terminal. (Not at the dry contact end)

3. See Quick Reference Sheets for Dry Contact

wiring & specific connection to 3 or 4 wire SI’s.

Check QRS for berg jumpers correct settings.



+5 GND S1

User Switch

3 wire

terminal



+5 GND S1 S2



User Switch

4 wire

terminal









APP-006 Home Load Manager Installation 4

APP-006 Home Load Manager Installation







4. Communicating MCS-STAT (communicating thermostat) is wired in the field using

a four wire shielded cable. (20 - 24 gauge stranded shielded cable) The figure

below illustrates the correct wiring for up to three MCS-STATS.



What’s Important



1. The MCS-ZONE is wired in the field. Four wire

shielded cable must be used. (20 - 24 gauge

stranded shielded cable)

2. The ground drain is tied only to the MCS SI on the

ground terminal. (Not on the STAT board)

3. See Quick Reference Sheets for other boards &

specific connection to 3 or 4 wire SI’s.

+12 GND +SIG -SIG GND







77.6 77.6 77.6

SET SET









MCS-STAT1 MCS-STAT2 MCS-STAT3









APP-006 Home Load Manager Installation 5

APP-006 Home Load Manager Installation





MCS WIRE PULLS

1. MCS - Three (3) jacketed wires from power source to MCS-8. (Line, Neutral &

Ground.) Wire from the circuit breaker to the MCS-8. If you have & MCS-I/O it

should also be wired from the circuit breaker to the MCS-I/O. Use 14 to 18 gauge

stranded wire. (NO SOLID WIRE & NO BARE GROUND WIRE)



2. HVAC - Number of wires to pull is equal to the number of outputs plus one (1). If

you have 4 outputs then you will pull 5 wires. (One for each output plus the 24

vac line.) Bring a line from 24 vac transformer on HVAC to the common on 1st

relay output (Fan) on MCS unit. Jumper commons on relay outputs for each

stage of HVAC output. (Compressor, Reversing valve, Aux. Heat, Emer. Heat,

etc.). Use 14 to 20 gauge stranded wire. (NO SOLID WIRE & NO BARE

GROUND WIRE)



3. WATER HEATER - Mount water heater interface box on or near the water

heater.



3.1. Wire 120/240 vac from supply to input terminals on water heater interface

box printed circuit box.



3.2. Wire 120/240 vac from output terminals on water heater interface box to

water heater.



3.3. Mount MCS-T100 temperature sensor next to upper water heater

temperature control. Feed wire up through top with power wires. Use foam

pipe insulation to wedge MCS-T100 sensor against tank. Wire the two

temperature sensor wires and the drain shield to the input terminal on the

water heater interface printed circuit board.



3.4. Pull a four (4) wire shielded cable, 20 to 22 gauge stranded, from the

water heater interface printed circuit board to the MCS. Record wire colors

for use in connecting at the MCS end.



3.4.1. Connect one lead to the Normally open of the relay output for the

water heater. Wire from the common of this relay to the +12 vdc to

the right of the sensor inputs.

3.4.2. Connect one lead to the ground of the temperature sensor input

with the shield drain.

3.4.3. Connect the other two leads to the +5 vdc and the signal of the

temperature sensor input.



4. MCS-STAT - Mount the communicating thermostat at or slightly below eye level.

(12 o’clock viewing angle).









APP-006 Home Load Manager Installation 6

APP-006 Home Load Manager Installation





4.1. Pull one (1) 4 wire shielded cable from the STAT location to the MCS.

(Use 20 to 22 gauge stranded cable.)

st

4.2. For multiple STATs pull the 4 wire shielded cable from the 1 STAT to the

next STAT, etc.. Connect at STAT end noting color’s used. (DO NOT

CONNECT SHIELD DRAIN AT STAT END)



4.3. Connect + & - communications wires to MCS-I/O communications terminal

on the MCS unit.

4.4. Connect +12 vdc and ground to +12 vdc terminal on MCS. Tie ground shield to

ground on this terminal.









What’s Important



1. Stranded cable only.

2. Pull three (3) jacketed stranded wire from 120 vac power to MCS. Use 14 to

18 gauge.

3. Pull number of outputs plus one wires from MCS to the HVAC unit. Use 14

to 20 gauge stranded wire.

4. Pull normal high voltage to water heater but wire to water heater interface

box.

5. Pull four (4) wire shielded stranded cable from MCS to water heater

interface box. Use 20 to 22 gauge.

6. Pull four (4) wire shielded stranded cable from MCS to communicating

thermostat. Use 20 to 22 gauge. They must be daisy chained.

7. The communication termanitations jumpers should be on at MCS and last

MCS-STAT. (If you have an I/O unit the MCS-STAT should be attached to

the I/O unit and jumpers positioned as stated above.



See attached wiring diagrams



1. Single unit (MCS-8) with one heat pump and water heater.

2. Single unit (MCS-8) with two heat pumps and water heater.

3. Two units (MCS-8 & MCS-I/O) with two heat pumps and a water heater.









APP-006 Home Load Manager Installation 7

APP-006 Home Load Manager Installation





Single Unit - (MCS-8) One Heat Pump and Water Heater





Comp. Aux

Heat



Fan Rev Emer

Valve Heat

To 120

24vac line vac

supply



120vac









MCS-8









Power to

Water

Optional +12 Heater

-HVAC Pressure Sensors, To

-Outside and Supply Air Comm MCS

Temperature Sensors.

Gnd STAT

-Meter Pulse

+12



Water Heater

Relay

Interface

B







MCS-T100 Water

Temp Heater

sensor









Single Unit - (MCS-8) Two Heat Pumps & Water Heater



APP-006 Home Load Manager Installation 8

APP-006 Home Load Manager Installation









Comp. Aux Comp

1 Heat 1 2



Fan Fan Rev

1 2 Vlv 2

To 120

24vac line vac

supply



120vac









MCS-8









Power to

+12 Water

Heater

To MCS To MCS

Comm STAT STAT

Gnd

+12

Water Heater

Relay

Interface

B







MCS-T100 Water

Temp Heater

sensor









APP-006 Home Load Manager Installation 9

APP-006 Home Load Manager Installation





Two Units - (MCS-8 & MCS-I/O) Two Heat Pump’s and Water Heater

Comp. Aux

1 Heat 1



Fan Rev Emer

1 Vlv 1 Heat 1

To 120

24vac line vac

supply









MCS-8







Power to

Water

Heater



+12vdc

Optional

-HVAC Pressure Sensors,

-Outside and Supply Air To MCS To MCS

Temperature Sensors. Comm STAT STAT

-Meter Pulse Gnd

+12

Comp. Aux Water Heater

2 Heat 2 Relay

Interface

Fan Rev Emer B

2 Vlv 2 Heat 2

To 120

24vac line vac

supply





MCS- Water

T100 Heater

Temp

sensor

MCS-8









Optional

-HVAC Pressure Sensors,

-Outside and Supply Air

Temperature Sensors.









APP-006 Home Load Manager Installation 10


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