7
7 Install Batteries
Install two AAA alkaline batteries.
Back of thermostat
RTHXXXX
M32707
Alternate wiring (for heat pumps with auxiliary or backup heat only)
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
Leave metal jumper in place, connecting
R
&
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.
Do not use
C
or
X
wire. Do not use
B
wire if you already have
O
wire.
Wrap bare end of wire with electrical tape.
Do not use
L
wire. Wrap bare end of wire with electrical tape.
If your old thermostat had
E
and
Aux
wires (or alternate wires), connect
both wires to
Aux
terminal.
5
6
7
M32728
2
7
4
AUX
W
W1
W2
F
B
O
G
H
C
RC
V
VR
B
X
R
M
Y1
Y
E
7
X
X2
L
F
6
5
3
2
1
B O G Y
W/
AUX
NOT
USED
R Rc