7
Alternate Wiring (Heat Pump Only)
5
Leave metal jumper in place, connecting
R
and
Rc
terminals.
If your old thermostat had both
V
and
VR
wires, stop now and contact a
qualified contractor for help.
If your old thermostat had separate
O
and
B
wires, wrap the
B
wire in
electrical tape and do not connect.
If your old thermostat had
Y1
,
W1
and
W2
wires, stop now and contact a
qualified contractor for help.
If there were seperate wires on
E
and
Aux
, place both wires in the Aux/E
terminal.
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
MCR31275B
E
5
4
2
AUX
X
W
F
H
B
W1
W2
X2
L
O
G
F
L
C
Y
R
R
VR
M
V
Y1
B
X
R
Y
Rc
Rc
G
O/B
Aux
E
