11 69-1631—1
Old thermostat terminals that do not match new thermostat terminals
Use the table below to wire the new thermostat.
*Remove factory-installed jumper between R and Rc terminals in 5-wire systems.
Old Thermostat
Termi nal
Connect to New
Thermostat
Terminal Description
R, RH, 4, V R* Power
Rc, R Rc* Power for cooling
W, W1, H W Heat
Y, Y1, M Y Cooling
G, F G Fan
O Do not continue
installation
Changeover in cool (O terminal) or changeover in heat (B terminal).
You have a single-stage heat pump or zoning system. Select an alternate
thermostat model.
B
C, X, B Do not connect Transformer common.
W2, H2Do not continue
installation.
Second stage heat (W2, H2) or second stage cooling (Y2).
You have a multistage heating/cooling system. Select an alternate
thermostat model.
Y2