Alternate Wiring (Conventional Systems)
If labels do not match terminals, connect wires as shown here (see notes,
below).
C
X
B
If wires will be connected to both R and Rc terminals, remove metal
jumper.
Do not use C, X or B. Wrap bare end of wire with electrical tape.
Wiring—Heat Pump
If E and Aux do not each have a wire connected, use a small piece of wire to
connect them to each other.
L
Y2
W2
Y2
W2
Aux
Y
G
O/B
E
G
W
F
W1
H
G
W
R Rc
MCR31276A
6
Y
R
Rc
Y1
RH
R
M
4
V
Y
R
Rc
MCR31274B