Installing your thermostat
Wiring (heat pump system only)
7B Wire thermostat to your heat pump.
a Starting with the C Wire, match the sticky tag on the wire to the terminal
labels.
You must have a C wire.
b Loosen screw, insert wire on inside edge
of terminal, then tighten screw.
c Verify wire is firmly secured by gently
pulling on wire.
d Repeat steps a–c for all other wires.
e Push any excess wire back into the wall
opening after all wires are installed.
f Continue to page 8.
Note:
If old thermostat has separate wires on
AUX
and
E
, place both wires into the
E/AUX
terminal.
If old thermostat has wire on
AUX
with a jumper to
E
,
place wire on
E/AUX
terminal. No jumper is required.
Labels don’t match?
See alternate
wiring key on pages 7.
MCR33877
G O
Y
R
HEAT PUMP
AUX/E
G
O/B
Y R RC
K L
C
Aux
Note:
The wiring for your
application might be
different from the wiring
shown above.
Alternate wiring (conventional system)
Use this if your wire labels don’t match the terminal labels.
Note:
You must have
a C wire or equivalent.
Do not use
K
terminal. For future use.
If your old thermostat had both
R
and
RH
wires, remove metal jumper.
Connect the
R
wire to the
RC
terminal, and the
RH
wire to the
R
terminal.
Remove metal jumper connecting
R
and
RC
only
if you must connect both
R
and
RC
.
Alternate wiring key (conventional system)
2
3
1
Y2
R
4
M
V
RH
Y1
H
W1
F
R
Y
W
G
RC
W2
W2 G
W
Y R RC
Y2
C
MCR33885
CONVENTIONAL
C
B
C1
X
K
1
2
3
