Lochinvar & A.O. Smith 100112351 Burner Assembly 321042-401 Always verify the fan blade

Always verify the fan blade pitch matches this rotation before installation to ensure proper heat rejection

Safety Integrated: Includes internal thermal protection to prevent winding failure during abnormal operating conditions or voltage fluctuations

this mounting kit is typically utilized in normally closed (PDTO) or three-way mixing valve configurations where a high-tension return or specific sequencing is required

When troubleshooting pressure switch errors or low airflow faults

Lochinvar & A.O. Smith 100112351 Burner Assembly 321042-401 Always verify the fan bladeThe Lochinvar & A. O. Smith 100112351 Burner Assembly is a critical component for restoring the combustion efficiency of low NOx natural gas water heaters and commercial boilers. As a genuine OEM 18 inch natural gas burner kit, this assembly is engineered to maintain the precise thermal output required by high recovery units. It features a factory installed #37 orifice, ensuring the correct BTU input and gas to air ratio for stable flame propagation