Heat Pump Thermostat Wiring Diagram Heat pump thermostat wiring - A typical wire color and terminal diagram. As shown in the diagram, you will need to power up the thermostat and the 24V AC power is connected to the R and C terminals. The color of wire R is usually RED and C is BLACK. C is known as the common terminal. These two connections will ensure that there is power to the thermostat that you are operating. Low Voltage Wiring Diagram Trane Model Number Twe040e13fb2 Install color coded low voltage cables between outdoor unit, indoor unit and thermostat. Connect low voltage control wiring to the low voltage terminal board located on the side of the fan control box per the typical interconnecting Page . Need a wiring diagram for a trane heat pump model number BWCO36cao SERIAL# X - Answered by a verified HVAC Wire A Thermostat The diagram below shows how a basic 4-wire thermostat is connected as indicated by the color code chart above. The basic Heat + A/C System thermostat typically utilizes only 5 terminals. RC - Red Wire (Power 24 Vac) RH or 4 - Red Wire Jumpered (Power 24 Vac) W - White Wire (For Heating Enable) Y - Yellow Wire (For Cooling Enable) Guide to wiring connections for room thermostats Wiring connections for a room thermostat such as the Honeywell 24-volt T87F, the Honeywell series 10 (out of production), or Penn "Rimset" low-voltage wall thermostat models are pretty simple as are the wiring instructions for White Rogers, Mercoid, General Controls, and similar thermostats.
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