Utica-Dunkirk 550001339 Transformer 320788-703 Simple Millivolt Operation: Self-powered design

Simple Millivolt Operation: Self-powered design eliminates the need for external 24V wiring or transformers

ensuring proper form

This makes it an essential component for boiler feed lines

Designed for gas-fired unit heater applications

and R-410A applications

Utica-Dunkirk 550001339 Transformer 320788-703 Simple Millivolt Operation: Self-powered designThe 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