10
INSTALLATION
69-0654-5
M20127
JUMPER (FACTORY-
INSTALLED). REMOVE
IF 5-WIRE SYSTEM
R
Rc
W
Y
G
Five wires connected to the old thermostat
Your new thermostat has a factory-installed metal jumper between the R and Rc terminals (Fig. 15). Remove the jumper
before wiring the R and Rc terminals.
Fig. 15
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
terminal
Connect to new
thermostat terminal Description
R, RH, 4, V
R*
Power
Rc, R
Rc*
Power for cooling
W, W
1
, H
W
Heat
Y, Y
1
, 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. See page 2 for an
alternate thermostat model.
B
C, X, B
Do not connect
Transformer common.
W
2
, H
2
Do not continue
installation.
Second stage heat (W
2
, H
2
) or second stage cooling (Y
2
).
You have a multistage heating/cooling system. See page 2 for an alternate
thermostat model.
Y
2
