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Unlike a simple switch
Reduced Downtime: Permits the upgrade or replacement of sensing elements without the need to drain the boiler or system piping
Repeated tripping usually indicates a low refrigerant charge
As the verified OEM replacement for PRS3428 and PRS2428
Johnson Controls P170AA-400 Pressure Control Els PW 17895 Unlike a simple switchThe Johnson Controls P170AA 400 is a high performance high pressure cutout control designed for heavy duty commercial refrigeration and HVAC applications. This SPST pressure switch features an "Open Low" action, making it a standard choice for condenser fan cycling control and high pressure system protection. Built with a rugged NEMA 1 all steel enclosure, the P170AA 400 provides reliable operation for systems utilizing non corrosive refrigerants. It