STEP #3
INSTALL BACKPLATE & WIRE
Page 4
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.
Remove the backplate connector from the
rear of the thermostat. Attach it to the wall.
Install wires as directed below. When
finished, snap thermostat on to backplate.
Wire from the
old thermostat
terminal marked
Function
Install on the
new thermostat
connector marked
G or F
Fan
G
Y1, Y or C
Compressor
Y1
W1,O,B
Power
Rh, R, M, Vr, A
R
C
O/B
C
Common
Rev. Valve
Y2
Y2
W2
W
W2
W3
2nd Stage Comp.
2nd Stage Heat
3rd Stage Heat
RS+5
RS+5
Remote 5vdc
RS
RS
Remote Sensor Signal
RS G
RS G
Remote Sensor Ground
67
70
H
EAT
C
OOL
AUTO
o
o
Am
6:03
68
Su
67
70
H
EAT
C
OOL
AUTO
o
o
Am
6:03
68
Su
