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Install Batteries - Honeywell RTHL2510 Owner's Manual

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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).
6
L
Leave metal jumper in place, connecting
If your old thermostat had both
qualified contractor for help.
If your old thermostat had separate
electrical tape and do not connect.
If your old thermostat had
qualified contractor for help.
Do not use C or X wire. Do not use B wire if you already have O wire.
5
Wrap bare end of wire with electrical tape.
Do not use L wire. Wrap bare end of wire with electrical tape.
6
If your old thermostat had E and Aux wires (or alternate wires), connect
7
both wires to Aux terminal.

7 Install Batteries

Install two AAA alkaline batteries.
7
3
5
E
C
B
F
X
H
X
X2
B
B
O
,
Y1
Back of thermostat
4
7
O
G
Y
AUX
F
W
Y1
M
W1
W2
G
Y
&
R
Rc
and
wires, stop now and contact a
V
VR
and
wires, wrap the B wire in
O
B
and
wires, stop now and contact a
W1
W2
RTHXXXX
7
1
2
R
RC
V
VR
R
Rc
2
M32728
terminals.
M32707

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