Description
The York S1-03101975000 Defrost Control Board is used to regulate programmed defrost cycles in HVAC systems. It receives the input of the temperature and pressure sensors, and it sends the command to the heaters, fans, and compressors to start and stop the defrost process when necessary. It is applied in heat pump systems and commercial refrigeration units, whereby the defrost management is required to be controlled to avoid the accumulation of outside coils. The subset of the system control section assists in the coordination of equipment response to changed conditions, aiding in the stable operation.
