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14
Wiring Diagrams
Typical 2-Wire Millivolt System
RC
RH
G
Y
W
B
O
Install Jumper
COOL 24 VAC
TRANSFORMER
COM
FAN
CONTROL
COOL
CONTROL
HEAT
CONTROL
24 VAC
TRANSFORMER
HOT
Typical 4-Wire System
RC
RH
G
Y
W
B
O
Install Jumper
COOL 24 VAC
TRANSFORMER
HEAT
CONTROL
COM
24 VAC
TRANSFORMER
HOT
COOL
CONTROL
FAN
CONTROL
70812-IM 12/21/06 3:06 PM Page 14