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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
GAS
VALVE
24 VAC
TRANSFORMER
OR
THERMOPILE
110
Figure 8
TYPICAL COOLING AND
HEATING SYSTEM
(5-WIRE)
G
Y
W RH
GAS
FAN
VALVE
COOL
COMP
24 VAC HEAT
TRANSFORMER
Figure 11
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 sub-base.
TYPICAL HOOKUP FOR 3-WIRE
HEAT SYSTEM IF THIRD
O
RC
G
FAN
B
O
RC
REMOVE
JUMPER
BETWEEN
RH & RC
110
24 VAC COOL
TRANSFORMER
110
WIRE IS FAN WIRE
Y
W RH
B
O
RC
GAS
VALVE
24 VAC
TRANSFORMER
110
Figure 9
TYPICAL SINGLE-STAGE
FAN
N O T E
TYPICAL COOLING AND
HEATING SYSTEM
(4-WIRE)
G
Y
W RH
GAS
FAN
VALVE
COOL
COMP
24 VAC HEAT
TRANSFORMER
Figure 10
HEAT PUMP WIRING
G
Y
W RH B
O RC
ADD
JUMPER
CHG.
BETWEEN
Y & W
OVER
COMP
24 VAC HEAT
TRANSFORMER
110
Figure 12
B
O
RC
110
ALT.
3
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