036-21508-005-A-0305
TYPICAL POWER WIRING
REFER TO THE ELECTRICAL DATA
TABLES TO SIZE THE DISCONNECT
SWITCH, OVERCURRENT PROTEC-
TION AND WIRING.
TYPICAL CONTROL WIRING
COOLING / HEATING (24 VOLT THERMOSTAT)
THERMOSTAT1
TERMINALS
| RH | UNIT TERMINAL |
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| STRIP TB1 |
| |
ADD |
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| |
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JUMPER | RC | R |
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| Y | Y1 | 24 VOLT |
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| |
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| TRANSFORMER |
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| Y2 |
|
WW1
W2
GG
C
124 VOLT THERMOSTAT 2ET07701024. TO CONTROL THE ECONOMIZER ON THE SECOND STAGE COOLING OR TO HAVE AN ELECTRIC HEAT ACCESSORY WITH TWO STAGES OF HEAT, USE THERMOSTAT 2TH0471024.
COOLING / HEATING (ELECTRONIC THERMOSTAT)
MULTI STAGE
COOLING / HEATING (ELECTRONIC THERMOSTAT)
SINGLE STAGE
| THERMOSTAT1 |
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| TERMINALS |
| UNIT TERMINAL |
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| THERMOSTAT1 |
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ADD |
| RC |
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| STRIP TB1 | 24 VOLT |
|
| |
| RH |
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| R | TRANSFORMER |
| TERMINALS | UNIT TERMINAL | |
JUMPER |
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| Y1 |
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| Y1 |
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| STRIP TB1 |
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| Y2 |
| 2 | Y2 |
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| RH | |
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| W1 |
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| W1 |
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| RC | R |
| 4 | W2 |
| 3 | W2 |
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| ADD |
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| G |
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| G |
| Y | Y1 | |
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| JUMPER | ||||
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| B |
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| C |
| W | W1 | |
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| LED 1 |
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| X |
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| LED 2 | NOT |
| OCC |
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| G | G |
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| COM | USED | 4 |
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| C |
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| A1 |
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ADD |
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| 24 VOLT | |
JUMPER |
| A2 |
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| T |
| TO REMOTE SENSOR |
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| TRANSFORMER | |
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| T |
| 2TH040702224 IF USED |
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1ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 (INCLUDES SUBBASE).
2SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER.
3SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE ELECTRIC HEATER.
4REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR P6 ON UNITS WITH ECONOMIZER. TERMINALS A1 AND A2 PROVIDE A RELAY
1ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET07701024 (INCLUDES SUBBASE).
TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT 2TH04700224.
FIGURE 2 - TYPICAL FIELD POWER & CONTROL WIRING
34 | Unitary Products Group |