Honeywell Dual Fuel Wiring Diagram. The th8321 thermostats provide temperature control for gas. 05 15 2 6 8 10 12 14 16 hours 0347 droop temperature 2 2f 1c other options.
2 press and hold the two blank keys on either side of the center blank key for approximately five seconds until screen changes. The heat pump and furnace have separate boards. See the diagram below for what each wire controls on your system.
Including dual fuel operation.
Trade model thermostats are required to operate dual fuel systems systems that use a heat pump for the first 1 or 2 stages of heating and use a gas or oil furnace for backup emergency heating. T10 pro wi fi wiring diagrams 33 0043902 6 dual fuel 3h2c. Heat pump erv or hrv whole house ventilator with built in transformer eard fresh air damper powered by furnaceair handler transformer eard fresh air damper powered by a dedicated transformer m36911b dual fuel 3h2c heat pump compatible t6 smart models. Nest dual fuel wiring diagram gallery install nest thermostat r wire elegant awesome two stage thermostat.