If you have a Trane model thermostat and a wire labeled X or B, refer to your thermostat manual. In some cases, one of those wires is your common. If you have a C wire, place it into the C terminal on your wall plate. C wire adapters are available here. Let's look at the G wire. This wire goes to the G terminal on your new thermostat.. An AC thermostat wiring diagram is a two-dimensional drawing that shows the connections and components involved in the wiring of an AC unit. The diagram can be used to help troubleshoot wiring problems and make sure all components are correctly connected. It also provides a comprehensive overview of the different types of wires and their.
24V or low-voltage heating and cooling systems include one or more of these components: Heating: Gas furnace, either natural gas (NG) or propane (LP), oil furnace, heat pump with or without auxiliary heat strips Cooling: Air conditioner, PTAC (packaged terminal air conditioner), heat pump Accessories: Humidifier, dehumidifier, ERV/HRV ventilator, air purifier and other air quality equipment. Thermostat Wiring Diagrams for Heat Pumps - Heat Pump Thermostat Wire Diagrams. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool.While an air conditioner uses the process of refrigeration to only cool, the central air conditioner will usually be paired with a gas furnace, an electric furnace, or some other method of heating.