Lochinvar & A.O. Smith 100110717 Transformer

The Lochinvar & A.O. Smith 100110717 Transformer is a critical low-voltage power solution engineered for commercial water heaters and high-efficiency boiler control circuits. This 120V to 24V step-down transformer provides a steady 40 VA output, ensuring consistent performance for ignition modules, gas valves, and electronic controllers. Designed as a direct OEM replacement (also referenced as 9005901205), it features a primary voltage tap of 120V and a secondary 24V secondary. Built for the rigors of mechanical rooms, this class 2 transformer integrates into Lochinvar Knight and A.O. Smith Cyclone series units. For technicians performing field service, its standard foot-mount configuration allows for rapid installation in existing control cabinets. Utilizing an HVAC control transformer with the correct volt-ampere rating is essential to prevent control board failure and under-powered relays in high-demand heating systems.

• OEM Compatibility: Precision-engineered for Lochinvar and A.O. Smith commercial systems, including BTR and Knight boiler models.
• Optimized Power Output: Provides a stable 24VAC 40VA supply, ideal for powering multi-stage gas valves and digital diagnostics.
• Heavy-Duty Construction: Built to withstand the thermal demands of high-output boiler rooms without voltage sag.
• Simplified Integration: Direct-fit replacement transformer design ensures wiring terminals align with factory specifications for reduced labor time.

• Can this 40VA transformer replace a 30VA unit? Yes, you can typically scale up in VA rating as long as the primary (120V) and secondary (24V) voltages match, as the 40VA rating defines the maximum load capacity.
• Is this compatible with 208V or 240V systems? This specific model is a dedicated 120V primary unit; verify your field voltage before installation.
• Will this solve an ignition failure code? If the 24V secondary loop is showing zero voltage or significant drop under load, replacing the 100110717 transformer is the standard protocol to restore power to the ignition sequence.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.