Heating/Cooling
T
H
E
R
M
O
S
T
A
T
4 or 5-Wire, Single Transformer
5-Wire, Two Transformer*
C
RH
W
G
RC
Y
B
O
120 VAC
HOT
Transformer
24 VAC
120 VAC
HOT
24 VAC
(Heating)
Transformer
120 VAC
HOT
24 VAC
(Cooling)
Transformer
Heating
Control
Fan
Control
Cooling
Control
Heating
Control
Fan
Control
Cooling
Control
Pre-Installed Jumper
Remove Pre-
Installed Jumper
T
H
E
R
M
O
S
T
A
T
C
RH
W
G
RC
Y
B
O
*
Both transformers must be in phase.
Wiring Diagrams
