6
Alternate Wiring (Conventional Systems)
If labels do not match terminals, connect wires as shown here (see notes,
below).
Alternate Wiring (Heat Pump)
If labels do not match letters on thermostat, see page 7.
Remove metal jumper connecting
R
and
Rc
only if you must connect
both
R
and
Rc
wires.
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.
If your old thermostat had only 1
C
or
C1
wire, connect it to the
C
terminal. If your old thermostat had 2
C
or
C1
wires, wrap each
separately with electrical tape and do not connect them.
RC
R
W
Y
G
C
Y2
W2
Rc
R
W
Y
G
C
Y2
W2
MCR28076
2
3
2
NOTE:
If
E
and
Aux
do not each have a
wire connected, use a
small piece of wire to
connect them to each
other.
MCR33552
Aux
E
L
C
G
Y
O/B
RC
R
HEAT PUMP
Y
G
R
Au
x
O
HEAT PUMP
