Lochinvar & A.O. Smith 100109308 Burner

The Lochinvar & A.O. Smith 100109308 Burner is a critical LP FV burner assembly designed for high-efficiency liquid propane water heaters. This assembly features a precision-drilled #51 orifice, engineered to maintain the correct stoichiometric ratio for clean combustion within Flammable Vapor (FV) ignition systems. As a direct OEM replacement burner, it ensures the unit stays within manufacturer specifications for BTU output and flame stability. For technicians performing water heater burner replacement, this component addresses issues like clogged ports or distorted flame patterns that lead to carbon monoxide production and poor heat transfer. The 100109308 is compatible with a wide range of Lochinvar and A.O. Smith residential and light commercial units, utilizing a robust design to withstand high-temperature environments. Integrating this A.O. Smith burner assembly restores the integrity of the combustion chamber, ensuring consistent performance and preventing FVIR system sensor trips caused by inefficient fuel burning.

Key Benefits:

• Direct OEM Fit: Ensures seamless integration with existing Lochinvar and A.O. Smith gas manifolds without field modifications.
• Precision #51 Orifice: Calibrated specifically for liquid propane (LP) to ensure optimal fuel delivery and thermal efficiency.
• FVIR Compatibility: Designed for use in Flammable Vapor Ignition Resistant systems to maintain safety compliance.
• Enhanced Flame Stability: High-grade construction reduces resonance and ensures a steady blue flame across all ports.

Common Questions:

What are the symptoms of a failing LP burner assembly?
Technicians typically look for yellow tipping, heavy soot accumulation, or delayed ignition. If the burner ports are corroded or the #51 orifice is obstructed, complete replacement is required to maintain the FVIR seal.

Is this burner assembly compatible with natural gas units?
No, this specific assembly is configured with a #51 orifice for liquid propane. Using this on a natural gas system will cause significantly under-fired conditions and safety hazards.

Does this assembly include the manifold door gasket?
The 100109308 usually consists of the burner head and orifice. It is standard practice for HVAC contractors to inspect and replace the pilot assembly and manifold gasket simultaneously to ensure a gas-tight seal.

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.