Honeywell RTH6500 User Manual page 9

Installing your thermostat
Alternate wiring (heat pump system only)
Use this if your wire labels don't match the terminal labels.
Note:
You must have
a C wire or equivalent.
See page 6.
Alternate wiring key (heat pump system only)
1
Do not use K terminal. For future use.
If old thermostat has separate wires on AUX and E, place both wires into the E/AUX terminal. If
2
old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is
required.
3 If your old thermostat had an O wire and not a B wire, attach the O wire to the O/B terminal.
If your old thermostat had separate O and B wires, attach the B wire to the C terminal. If
4
another wire is attached to the C terminal, check wifithermostat.com for help. Attach the O wire
to the O/B terminal.
5 If your old thermostat had separate Y1, W1 and W2 wires, check wifithermostat.com for help.
6
If your old thermostat had both V and VR wires, check wifithermostat.com for help.
Leave metal jumper between R and RC terminals in place.
7
3
2
4
L E AUX G O
F X W F
X2 W1
W2
1
G O/B
L
K
AUX/E
4 5
6
C
Y R RC
H
X Y1 V R
B
B M VR
C
Y R RC
7
7
HEAT PUMP
MCR33886
69-2715EF—07