Honeywell RTH6500WF - Alternate Wiring Options; Heat Pump System Wiring Key

19 69-2718ES—01
Installing your thermostat
Alternate wiring key (heat pump system only)
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
old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is
required.
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
another wire is attached to the C terminal, check wifithermostat.com for help. Attach the O wire
to the O/B terminal.
If your old thermostat had separate Y1, W1 and W2 wires, check wifithermostat.com for help.
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.
2
3
1
4
5
6
7