Wiring Diagram For Thermostats. Finally the third thermostat diagram showing the average type of split system with an air conditioner or gas or oil furnace used for heating. Yellow the yellow wire connects to your compressor.
Connect to the thermostat wires skip to the next step if youre installing the nest thermostat on the stand and are using the usb cable for power. Each part should be set and linked to other parts in specific way. Click the icon or the document title to download the pdf.
Follow the manufacturers instructions for installing this kit at the hvac control board.
Heres a diagram of a thermostat that is being powered by an external transformer. Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. Take two wires from the wire bundle that goes to the current thermostat and attach them to the t1 and t2 terminals on the heat link. Follow the manufacturers instructions for installing this kit at the hvac control board.