In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC).
Refer to the furnace or air handler installation instructions for additional wiring application diagrams. Refer to unit nameplate for minimum circuit ampacity and maximum over-current protection size.
24VAC TRANSFORMER
Use the transformer provided with the furnace or air hand ler for low?voltage control power (24VAC – 40 VA minimum).
