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

the orifice may be obstructed or improperly sized

Is this switch suitable for both Natural Gas and Propane Raypak heaters

indicating refrigerant shortage or liquid line restrictions

Johnson Controls A70KA-1 Control Els PW 29614 5" WC (Water Column) toThe 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