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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
XWFH
B
W1
W2
X2
L
OG
F
L
C
YR
R
VRM
VY1
B
X
R
YR
c
RcG O/B
Aux
E