255027-YTG-B-0507
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 |
|
ADD | STRIP TB1 |
| |
|
|
| |
JUMPER | RC | R |
|
| Y | Y1 | 24 VOLT |
|
| Y2 | TRANSFORMER |
|
|
|
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 |
|
|
| |
TERMINALS |
| UNIT TERMINAL |
| |
ADD | RC |
| STRIP TB1 | 24 VOLT |
RH |
| R | TRANSFORMER | |
JUMPER |
| |||
Y1 |
| Y1 |
| |
|
|
| ||
| Y2 | 2 | Y2 |
|
4 | W1 |
| W1 |
|
W2 | 3 | W2 |
| |
| G |
| G |
|
BC
LED 1 |
|
|
| X |
LED 2 | NOT |
|
| OCC |
| USED |
|
|
|
COM | 4 |
|
|
ADD | A1 |
JUMPER | A2 |
T
TO REMOTE SENSOR
T
2TH040702224 IF USED
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 OR 2 STAGE GAS HEAT.
4REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR P6 ON UNITS WITH ECONOMIZER. TERMINALS A1 AND A2 PROVIDE A RELAY
| THERMOSTAT1 | UNIT TERMINAL | ||||
| TERMINALS | |||||
|
|
|
| STRIP TB1 | ||
|
| RH |
| |||
ADD |
| RC |
|
| R |
|
| Y |
| Y1 | |||
JUMPER |
|
| ||||
|
|
|
|
|
| |
WW1
G | G |
C
24 VOLT
TRANSFORMER
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 |
