The thermostat is the control center of your heating and cooling system, and the wiring diagram provides a roadmap for connecting the various components together. At its core, a thermostat is a device that senses the temperature in your home and controls the HVAC system to maintain the desired temperature.. The thermostat wiring diagram.. This wiring allows your thermostat to control the heating and cooling cycles of your home, maintaining the desired temperature. We'll delve into the basics of this wiring, exploring how it functions as the command center for your home's climate control. Types of Thermostats and Their Wiring Requirements. Not all thermostats are created equal.
Starting on the upper right side of the diagram above: RC - Red: This wire provides 24 volt power from the furnace to the thermostat so that the thermostat can control air conditioning. R - Red: This wire serves the same purpose as the RC wire but for heating. Y - Yellow: Cooling Mode. This wire runs to the furnace control board which in turn controls the activation of the compressor and.. Proportional wiring diagram (See Table 1 for terminal identification) Figure 2. Proportional 0 to 10 VDC control (pressure-dependent VAV) Figure 3.. TEC312x-14-xxx - TEC3322-1x-xxx - TEC3323-1x-xxx - TEC3622-1x-xxx - TEC3623-1x-xxx - Proportional Fan Coil Thermostat - Thermostats - TEC3000 Series Networked and Wireless Proportional Fan Coil.