and SC series units

SPNO Configuration: Reliable Close On Fall operation designed for specific York and Coleman sequences

22 and NSF 61G for both mechanical and potable water applications

allowing for rapid system recovery once the underlying overheat condition—such as a blocked vent

offering a precise fit and OEM-grade performance for HVAC technicians

Weil McLain 511-842-370 Transformer and SC series unitsThe Weil McLain 511 842 370 Transformer is a critical OEM replacement part engineered for high performance voltage regulation in residential and commercial boilers. As a step down control transformer, this component is designed to convert 120V primary voltage to a stable 24V secondary output, providing the necessary 40VA power rating to drive ignition modules, gas valves, and integrated boiler control systems. This HVAC control transformer is a direct