Utica-Dunkirk 550001339 Transformer R-134A The clockwise (CW) lead end

The clockwise (CW) lead end rotation ensures exact compatibility with York and Johnson Controls draft inducer assemblies

A: A NEMA 4 enclosure protects the coil against water

As a direct-acting valve

You must pair it with a compatible Erie PopTop actuator (AG or AH series) based on your voltage and close-off requirements

Always verify the common side of the line matches the original configuration to avoid damaging the switch internal contacts

Utica-Dunkirk 550001339 Transformer R-134A The clockwise (CW) lead endThe Utica Dunkirk 550001339 Transformer is a critical OEM replacement part designed for high efficiency hydronic systems, specifically engineered for the UB90 100 Series II and Q90 Series II boilers. This heavy duty 40VA step down transformer converts 120V primary line voltage to 24V secondary output, providing stable power to integrated control boards, gas valves, and secondary HVAC circuits. Built to withstand the thermal demands of residential and