8
Step 4 - Label & Disconnect Wires
1) One by one, apply a label
designated to each wire
you disconnect from
your current thermostat.
TIP: Before disconnecting any wires,
take a photo of your current wire
configuration with your mobile device.
Wire from the Install on the
old thermostat Function new thermostat Wire
terminal marked connector marked Color
G or F Fan G
Y1, Y Cooling Y1
W1, W Heating W1/0/B
Rh, R, M, Vr, A Power R
C Common C
O/B Rev. Valve W1/O/B*
W2 2nd Stage Heat W2
Y2 2nd Stage Cooling Y2
W3 3rd Stage Heat W3
H, Hum Humidity HUM
D, Dehum Dehumidity DEHUM
Ck1 Dry Contact Switch DRY CONTACT
CKGND Dry Contact Switch DRY CONTACT
* O/B is used if your system is a Heat Pump.
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