Reversing Valve Heat Pump Thermostat Wiring Diagram. C is known as the common terminal. Heat Pump Thermostat Wiring Explained.
Effective troubleshooting on heat pumps requires a thorough understanding of the heat pump system. Colors Terminals Functions Voltage Path. Different heat pump models label the auxiliary heat terminal differently than shown.
Heat pump thermostat wiring - A typical wire color and terminal diagram.
The heat pumps wiring diagram identifies the reversing valve and its operation. OB Reversing valve for Heat Pump systems. Other R Wire Terminal Designations and Wires. Usually only Rheem and Ruud brand heat pumps use the B terminal.