Lochinvar & A.O. Smith 100111335 Burner Assembly

The Lochinvar and A.O. Smith 100111335 Burner Assembly is a critical OEM replacement component designed for high-efficiency commercial water heaters and boilers. This 18-inch natural gas burner assembly features a precision-machined #37 orifice, ensuring calibrated BTU input and consistent flame patterns required for optimal thermal heat exchange. Engineered for high-output water heater repair, this assembly addresses common combustion issues such as irregular flame rectification or localized overheating caused by carbon buildup on aging burner ports. For contractors performing a commercial boiler tune-up, this 100111335 kit provides a direct-fit solution, minimizing labor time during combustion chamber overhauls. Installing a genuine Lochinvar replacement burner maintains the original equipment’s manifold pressure specifications and emissions profiles. Verifying compatibility with specific A.O. Smith BTP and Lochinvar Copper-Fin models is essential to ensure the air-to-fuel ratio remains within the manufacturer’s design parameters for safe, reliable operation in demanding mechanical room environments.

• Precision Orifice Calibration: The integrated #37 drill size orifice ensures accurate fuel delivery for stable combustion.
• OEM Compatibility: Designed as a direct drop-in replacement for 100111335 and GBA3001 part numbers.
• Heavy-Duty Construction: Built to withstand the high-temperature cycles common in commercial water heating systems.
• Optimized Flame Distribution: Improved port geometry facilitates a uniform flame, reducing stress on the heat exchanger.

Common Technical Questions

What symptoms indicate a burner assembly failure?
Technicians should look for uneven flame patterns, soot accumulation, or repeated ignition failures. If the burner ports are warped or the orifice is clogged beyond cleaning, a full assembly replacement is necessary to restore proper combustion.

Is this burner assembly compatible with Propane (LP) units?
No, this specific assembly is configured with a #37 natural gas orifice. Converting to LP would require a different orifice sizing and gas valve adjustment to meet specific gravity and BTU density requirements.

Should the burner gasket be replaced during this service?
Yes, maintaining a proper seal on the combustion chamber is vital. Always inspect and replace the mounting gaskets when pulling the burner tray to prevent CO leaks or bypass air from affecting the flame rectification signal.

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.