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Wiring—heat pump
Connect wires: heat pump
1
Match each labeled wire with same letter on new thermostat.
2
Insert the wires into the matching terminal.
NOTE: If you have difficulty inserting wires, you may have to press down the
terminal push button next to the corresponding terminal.
Labels don't match?
If labels do not match letters on thermostat, see page 12.
Alternate wiring (for heat pumps only)
NOTES:
1. Keep R Slider Tab in the up position (1 wire).
2. If your old thermostat had both V and VR wires, stop now and contact a
qualified contractor for help.
3. If your old thermostat had separate O and B wires, attach the B wire to the C
terminal. If another wire is attached to the C terminal, stop now and contact
a qualified contractor for help.
4. If your old thermostat had Y1, W1 and W2 wires, stop now and contact a
qualified contractor for help.
5. C does not power the thermostat display or operations; batteries are always
required.
6. This model doesn't support the heat pump fault alert (L/A terminal). If this
is desired, please contact a contractor for replacement model.
NOTE: Do NOT use W for heat pump applications. Auxiliary heat must wire to
AUX or E.
S
S
Y
Y
G
C
U
U
S
S
or
Y1
or
M
Y
Y
2
or
F
G
or
X
or
B
C
3
5
U
U
A
L/A
O/B
W
2
AUX
E
W
K
R
Rc
6
A
or
F
L/A
or
H
or
B
3
O/B
W
or
W
or
W1
2
AUX
or
X
or
X2
E
W
K
or
V
or
VR
R
Rc
13
RTH6360 Series
or
W2
4
1
2
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