and QMark heating units requiring a 4520-0015-000 specification

This specific model is a 230V single-phase component

Where should I mount this probe for the best accuracy

reducing bench time and installation errors

this large inner access door is designed to maintain the pressurized integrity of the heat exchanger cabinet while providing a secure seal against combustion byproduct leakage

Maxon 200SMA21AA11BB11A0 Gas Valve 322027-701 and QMark heating units requiringThe Maxon 200SMA21AA11BB11A0 is a heavy duty 2 inch ANSI threaded gas valve designed for high capacity industrial burner systems. Featuring a standard port flow configuration and a normally open 2 way operation, this cast iron gas shut off valve is built for general purpose applications where reliability is non negotiable. The unit utilizes Buna body O rings and a bumper for superior sealing performance. With 115Vac 60Hz solenoid and motor voltages,