Carrier HK02ZA224 Pressure Switch 362/321 PSI

The Carrier HK02ZA224 is a Pressure Switch for HVAC equipment including gas furnaces or refrigeration systems. This compact switch is about 3.7" long, 6.1" wide, and 0.8" high, easily fitting into just about any space. It has two main pressure ratings, one at which it opens at 362 PSI and one at which it closes at 321 PSI. The switch triggers an electrical response when pressure within the system exceeds the opening threshold of 362 PSI. It can shut down the compressor in an air conditioner or reduce gas flow in a furnace. On the other hand, when the pressure drops below the closing threshold of 321 PSI the switch resets and the system can resume operation.