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handling the standard duty cycles of residential and light commercial units
and OT200 disconnect switches
When installing this HVAC blower fan replacement
ensure the electrical rating matches your solenoid or contactor load requirements
Check the heater for continuity using a multimeter
Watts 0278480 Valve 321042-401 handling the standard duty cyclesThe Watts 0278480 (Series 174A) is a heavy duty, 2 inch ASME Section IV certified pressure relief valve engineered for large scale hot water heating boilers and high capacity domestic supply systems. This high capacity safety device is set to a 125 PSI relief pressure, offering a massive discharge rating of 12,170,000 BTU hr. Designed for the rigors of mechanical rooms, its bronze body construction ensures long term durability and resistance to
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