These diagrams below are provided for new installations or unreferenced wires.
TYPICAL HOOKUP FOR 2-WIRE
24V HEATING SYSTEM AND
MILLIVOLT SYSTEM
G Y W RH B O RC
GAS
VALVE
24VAC
TRANSFORMER
OR
THERMOPILE
110
Figure 8
TYPICAL HOOKUP FOR 3-WIRE
HEAT SYSTEM IF THIRD
WIRE IS FAN WIRE
G Y W RH B O RC
GAS
VALVE
FAN
24VAC
TRANSFORMER
110
Figure 9
TYPICAL COOLING AND
HEATING SYSTEM
G Y W RH B O RC
FAN GAS
VALVE
COOL
COMP
24 VAC HEAT
TRANSFORMER
110
Figure 10
TYPICAL COOLING AND
HEATING SYSTEM
G Y W RH B O RC
FAN GAS | ||
VALVE REMOVE | ||
COOL | JUMPER | |
BETWEEN | ||
COMP | ||
RH & RC | ||
| ||
| 24 VAC HEAT | |
TRANSFORMER | ||
| 110 | |
| 24 VAC COOL | |
| TRANSFORMER | |
| 110 | |
| Figure 11 | |
TYPICAL SINGLE-STAGE
HEAT PUMP WIRING
G Y W RH B O RC
| ADD | ALT. |
| JUMPER | |
FAN | BETWEEN | CHG. |
| Y & W | OVER |
COMP |
| |
24 VAC HEAT
TRANSFORMER
110
Figure 12
N O T E
If you have an electric system and the blower does not operate after installation, find the factory installed yellow wire currently attached to the “Y” terminal and move it to the “A” terminal on the
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