Quick Installation guide
8
Heat Pump Systems with Auxiliary/Backup Heat
(Alternate Wiring)
If your old thermostat had E and Aux wires (or alternate
wires), connect both wires to AUX terminal.
Do not use L wire. Wrap bare end of wire with electrical tape.
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.
This thermostat cannot be used if your old thermostat had
any two of the following wires: R, RC, V or VR.
r
Connect Wires (cont’d)
8.
69-2382ES-01 (RTH2410 5-1-1 QIG) ENG USA.fm Page 8 Monday, October 19, 2009 3:59 PM
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