Description
The York S1-03109151000 Control Board Expansion is an essential component used to have more operating stages in the HVAC systems. It works by communicating to allow up to four different levels of operation so that when it is used in normal mode, fan, compressor, and heating sequences can be modulated more accurately. It is applied in commercial multi-stage air conditioners and heat pump units, staged performance is a requirement. It ensures a stable operation and prevents cycling in normal conditions.
