Lochinvar & A.O. Smith 100172003 Gas Valve Assembly

The Lochinvar & A.O. Smith 100172003 Gas Valve Assembly is a critical OEM component designed for high-efficiency negative pressure regulation in Knight KBN150 and AWN150 series boilers. This direct replacement for the obsolete VAL3201 facilitates precise gas-to-air ratio control, ensuring stable combustion performance across the full firing rate. Engineered for natural gas applications, the assembly manages the fuel flow to the burner with a high-degree of accuracy required for condensing heat exchangers. As a veteran-grade HVAC replacement part, it integrates seamlessly with the existing gas train and wiring harness using standard 24VAC terminal connections.

Key Benefits:

• Direct OEM Compatibility: Specifically calibrated for Lochinvar Knight KBN, AWN, and SNR 150 models to prevent common ignition failure codes.
• Negative Pressure Operation: Designed to work with the blower-driven "pull-through" combustion systems found in modern condensing boilers.
• Rugged Construction: Built to withstand commercial and residential hydronic demands, minimizing gas valve relay faults.
• Optimized Combustion: Precision internal diaphragms provide consistent gas delivery for low-NOx operation and high fuel efficiency.

Common Questions:

• How do I troubleshoot a suspected valve failure? Technicians should verify 24VAC at the valve during the ignition sequence and monitor negative gas pressure with a manometer; a rise toward zero usually indicates the valve is opening.
• Can this be used for Propane (LP) conversion? This specific assembly is configured for natural gas. Refer to the specific Lochinvar LP conversion kit for your model if changing fuel types.
• Does it include the mounting gaskets? This is a standalone gas valve assembly; checking the condition of the venturi gasket during installation is a standard best practice.

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.