Johnson Controls P20CA-146 Pressure Control 100 PSI to 425 PSI 19 PSI Differential 36" Capillary Open 300 PSI

The Johnson Controls P20CA-146 is a high amperage, high pressure range pressure switch to be used for commercial HVAC applications specifically in air conditioning applications. This switch workings in the “OL, Auto Reset” mode.. Internally, there is a sensor that charges a pressure differential across a 36” capillary tube as refrigerant flows through it. If the pressure is low it goes below the set minimum usually set at 100 psi the switch opens circuiting power to the compressor motor.Another plus of P20CA-146 with 19 psi differential. This leads to less wear and higher efficiency as cycling is limited so the compressor is not under pressure to run full blast all of the time.