Wiring Details: The thermostat uses 1 wire to control each of your HVAC system's primary functions, such as heating, cooling, fan, etc. See the diagram below for what each wire controls on your system: Y - Compressor Stage 1 (Cooling) Y2 - Compressor Stage 2 (Cooling) G - Fan C - Common L/A - A - Input for heat pump fault. consult heat pump wiring guide. 4: c7089u1006 wired outdoor sensor can be used for balance point and aux heat lockout if desired.. they are shown together here to simplify this diagram. w is from the furnace board. 4: c7089u1006 wired outdoor sensor can be used for balance point if desired. 5: important: do not connect any wire to w for heat.
![[2+] Honeywell Two Port Valve Wiring Diagram, Vaillant Ecotec 831](https://i.pinimg.com/originals/b8/2c/80/b82c808ed3c341e9efffcb28d803f84c.jpg "[2+] Honeywell Two Port Valve Wiring Diagram, Vaillant Ecotec 831 Combi")
Consult your owners/install guide for wiring examples and systems compatible with your thermostat*. The thermostat uses one wire to control the primary functions of your HVAC system, such as heating, cooling, and fan. See the diagram below for the role of each wire in your system: S - Indoor and Outdoor Wired Sensors. G wire - Fan relay. 2H/1C Heat Pump System: NOTE: If dual fuel, TH6320WF (Trade FocusPRO WiFi 6000 only) R wire - Power [R+Rc joined by jumper] Y wire - Compressor contactor C wire - 24VAC common O/B wire - Changeover valve G wire - Fan relay Aux Auxiliary heat* E wire - Emergency heat relay L wire - Heat pump fault input. 2H/2C Heat Pump.