This Carrier HR54ZA006 model is built with a high-impact housing and heavy-duty spring-loaded plunger to withstand the high-cycle demands of a professional mechanical room environment

Enhanced Performance: Prevents bypass of the defrost cycle

this spring-actuated check valve utilizes a 316 stainless steel body (ASTM A351-CF8M) and a 15% glass-filled RPTFE ball cone to ensure reliable backflow prevention and superior chemical resistance

The 17-4PH stainless steel construction is specifically designed to resist corrosion from ammonia and other aggressive media

while the low-pressure side monitors between 1-6" W

Carrier HN52KC053 Contactor L99H008 This Carrier HR54ZA006 model isThis Carrier HN52KC053 Contactor is a heavy duty 2 pole definite purpose contactor designed for reliable switching in high demand HVAC and motor control applications. Engineered for 208 240V coil systems, it provides a 35A full load amperage (FLA) rating, ensuring it handles the start up inrush and continuous operation of residential and light commercial compressors. The double pole single throw (DPST) configuration features normally open (NO)