Alternate Wiring (For Heat Pumps Only)
Leave metal jumper in place, connecting
If your old thermostat had both
qualified contractor for help.
If your old thermostat had separate
the
terminal. If another wire is attached to the
C
and contact a qualified contractor for help.
If your old thermostat had
qualified contractor for help.
If
terminal is used,
L
5
contractor if there is no
If
and
E
Aux
6
piece of wire to connect them to each other.
2
3
3
5
5
6
4
6
Y1
terminal wire must be connected (contact a
C
wire).
C
terminals do not each have a wire connected, use a small
&
R
Rc
and
wires, stop now and contact a
V
VR
and
wires, attach the
O
B
,
and
wires, stop now and contact a
W1
W2
7
MCR28077
terminals.
B
terminal, stop now
C
wire to