Page 3.1
SECTION 3
Wire Connections
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.
* O/B is used if your system is a Heat Pump.
** For instructions on connecting these terminals
see page 4.6
Wire from the
old thermostat
terminal marked
Function
Install on the
new thermostat
connector marked
G or F
Fan
G
Y1, Y or C
Cooling
Y1
W1, W or H
Heating
W1/O/B
Power
Rh, R, M, Vr, A
R
C
O/B
C
Common
Rev. Valve
W2
2nd Stage Heat
RS+5
Outdoor 5vdc
RS+5**
RSGND
Outdoor Sensor Ground
RSGND**
W1/O/B*
W2
OUT
OUT**
Outdoor Sensor Signal
3
Air Conditionin
g
& Heatin
g
AU
TO
I2:0
0
Pm
HE
AT
CO
OL
72
74
