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STEP #3
Remove the backplate connector from the
rear of the thermostat. Install wires as directed
below. When finished, snap thermostat on to
backplate.
If the terminal designations on your old
thermostat do not match those on the
new thermostat, refer to the chart below,
or the wiring diagrams that follow.
Wire from the
old thermostat
terminal marked
G or F
Y1, Y or C
W1, W or H
Rh, R, M, Vr, A
C
O/B
Y2
W2
RS+5
RS
RS G
CK1
CK2
* C may not be used on all systems.
** O/B is used if your system is a Heat Pump.
INSTALL BACKPLATE & WIRE
Function
Fan
Cooling
Heating
Power
Common
Rev. Valve
2nd Stage Cool
2nd Stage Heat
Remote Sensor +5vdc
Remote Sensor Signal
Remote Sensor Ground
Dry Contact Switch 1
Dry Contact Switch 2
Page 4
Install on the
new thermostat
connector marked
G
Y1
W1,O,B
R
C *
W1,O,B**
Y2
W2
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