Isolate the power and perform a continuity test using a multimeter

and total motor failure

and other debris down to 20 microns to prevent mechanical wear on internal compressor components

Older 009 models require a different internal geometry for the check discs and O-rings

but its SPDT nature and dual-port design allow it to monitor differential pressure across the combustion circuit

Kunkle Valve 0537-H01-HM0075 Valve 320788-703 Isolate the power and performThe Kunkle Valve 0537 H01 HM0075 is a high capacity ASME Section IV pressure relief valve designed specifically for hot water boilers, heat exchangers, and generators. Featuring a 2" Female NPT inlet and a 2 1 2" Female NPT outlet, this Model 537 valve is factory set at 75 PSI to handle demanding thermal expansion and over firing conditions. With a rated capacity of 11,960 lb h (PPH) or 11,959,631 BTU h, it provides critical overpressure protection by