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Tech Tip

TRB on Thu July 23, 2009 9:50 AM User is offlineView users profile

A binary pressure switch is a compressor safety device that has 2 distinct functions. The first function cuts the compressor off if the refrigerant charge is lost or too low to prevent the compressor from running dry and locking up. The second function cuts the compressor off if the head pressure reaches unsafe levels to prevent compressor damage or damage to other components such as a blown hose. Always install the binary switch on the liquid side of the a/c between the condenser and expansion valve.

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