Lochinvar & A.O. Smith 100109318 Burner Assembly

The Lochinvar & A.O. Smith 100109318 Burner Assembly is a direct replacement LP gas burner engineered for high-efficiency water heater maintenance and repair. This LP FV Burner ASSY features a #51 orifice specifically calibrated for Liquid Propane applications, ensuring precise fuel-to-air ratios and stable combustion performance. Designed for units utilizing Flammable Vapor (FV) ignition technology, this assembly addresses common water heater pilot light issues and flame sensor failures. The robust construction and factory-set tolerances of this OEM burner replacement ensure strict compatibility with specific A.O. Smith and Lochinvar residential and light commercial models. Proper installation requires verifying that the CIII burner assembly specifications match the BTU input and manifold pressure requirements of the existing system to maintain optimal thermal efficiency and prevent carbon buildup or intermittent lockout cycles.

Technical Specifications & Benefits

• Precise Fuel Delivery: Equipped with a #51 LP burner orifice for accurate gas flow and consistent BTU output.
• FVIR System Compatibility: Designed to meet Flammable Vapor Ignition Resistant safety standards.
• Enhanced Durability: Engineered to withstand high-temperature combustion environments without warping or premature oxidation.
• Direct Fit OEM Component: Eliminates site-modification needs for Lochinvar or A.O. Smith water heater repair.

Common Technical Questions

How do I confirm if my unit requires the #51 orifice burner?
Always consult the rating plate on your water heater. This assembly is specifically tuned for liquid propane water heaters requiring a #51 drill size orifice; using this in a natural gas unit will cause hazardous combustion issues.

Does this assembly include the pilot and thermocouple?
This part number typically includes the main burner head and orifice assembly. It is standard practice for technicians to inspect the pilot tube and thermocouple for wear and replace them concurrently to ensure a complete water heater burner replacement.

What are the signs that a burner assembly needs replacement?
Visible soot accumulation, yellow-tipping of the flame, or a water heater that keeps shutting off due to poor combustion or sensor failure are primary indicators that the burner assembly has reached end-of-life.

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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.