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Installation Guide
12
Aux Y G O L R B CE
Aux Y G O L R B CE
4 33 2 1 2 2
or
X
X2
or
W
W1
W2
or
Y1
M
or
F
or
F
or
V
VR
or
H
or
B
X
If labels do not match thermostat letters,
check the chart at right (see notes, below).
Connect wires (less common wire designations)
If the old thermostat had both V
and VR wires, contact a heating/
cooling contractor for help.
If the old thermostat had both O
and B wires, attach the B wire to
the C terminal. If another wire is
attached to the C terminal, call
1-800-468-1502 for help.
If the old thermostat had W1, W2
and Y wires, contact a heating/
cooling contractor for help.
If no wire matches the E terminal on the new thermostat,
use a small piece of wire to connect terminals E and Aux.