The Wiring Diagram
Alternate Wiring-Conventional System
RC
RH
W
Y
G
C
S1
S2
RC
RH
W
Y
G
C
S1
S2
2
3
2
If labels do not match terminals, connect
wires as shown here (see notes, below).
Remove metal jumper connecting
RH and RC only if you must connect
both RH and RC wires.
If your old thermostat had both R
and RH wires, remove metal jumper.
Connect the R wire to the Rc terminal,
and the RH wire to the R terminal.
If your old thermostat had only 1 C or
C1 wire, connect it to the C terminal.
If your old thermostat had 2 C or C1
wires, wrap each separately with
electrical tape and do not connect them.
1H/1C System
RC
RH
W
Y
G
C
W2
Y2
Rc
R
W
Y
G
C
W2
Y2
2
3
2
Remove metal jumper connecting
RH and RC only if you must connect
both RH and RC wires.
If your old thermostat had both R
and RH wires, remove metal jumper.
Connect the R wire to the Rc terminal,
and the RH wire to the R terminal.
If your old thermostat had only 1 C or
C1 wire, connect it to the C terminal.
If your old thermostat had 2 C or C1
wires, wrap each separately with
electrical tape and do not connect them.
2H/2C System
S1
S2
S1
S2
Remote Sensor
Remote Sensor
Heat Relay
Compressor
contactor
Fan relay
24v common
Remote Sensor
Heat Relay 1
Compressor
contactor 1
Fan relay
24v common
Heat Relay 2
Compressor
contactor 2
Remote Sensor
09 10