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The 120Vac coil is protected by a NEMA 1 enclosure
effectively preventing catastrophic system failure due to thermal runaway
Installation is optimized for field efficiency through the included 25 foot modular cord (PIW25)
and electronic control boards without saturation
Precise Superheat Control: Maintains optimal thermal balance to protect the compressor from liquid floodback
Watts 0274426 Valve 321142-301 The 120Vac coil is protectedThe Watts 0274426 (Series 174A) is a heavy duty 3 4" bronze boiler pressure relief valve engineered specifically for high capacity protection in hot water heating systems and domestic supply boilers. Rated for a 33 PSI set pressure with a massive steam discharge capacity of 695,000 BTU hr, this valve is a critical safety component designed to prevent catastrophic over pressurization. It features a rugged bronze body and a stainless steel spring for