as this unit replaces several legacy Protech and UTEC versions

How do I identify the correct Maxitrol spring for my regulator

Can I use a universal pressure switch instead of the 632622R

the orifice may be obstructed or improperly sized

5" WC (Water Column) to ensure optimal combustion efficiency in Sterling unit heaters and furnaces

Johnson Controls A70KA-1 Control Els PW 29614 as this unit replaces severalThe Johnson Controls A70KA 1 Control is a heavy duty, high limit temperature controller designed for critical HVACR safety applications. This remote bulb temperature control operates within a setpoint range of 100F to 170F, specifically engineered to open the main circuit upon a temperature rise. Featuring a 4 wire, 2 circuit contact block, the A70KA 1 (identical to the A70KA 1C) provides two isolated sets of contacts: as the main LINE M2 contacts