Lochinvar & A.O. Smith 100135269 Burner 320788-704 the 42-100491-09 is the manufacturer-designated

the 42-100491-09 is the manufacturer-designated superceded part number

Improved Flame Sensing: Enhanced metallurgy in the sensing probe reduces resistance issues that cause intermittent pilot outages

What thermopile should I use with this valve

Standard Dimensions: Features a standard 3-inch insertion depth for compatibility with most Carrier-branded primary limit mounting brackets

the 1C26-101 vertical mount includes a wall-mounting subbase and an optional decorative wall plate to cover existing mounting holes from legacy controls

Lochinvar & A.O. Smith 100135269 Burner 320788-704 the 42-100491-09 is the manufacturer-designatedThe Lochinvar & A. O. Smith 100135269 Burner is a precision engineered 100% OEM replacement for high efficiency condensing boilers, specifically designed for WH285 and WH399 models. As a critical component in the combustion assembly, this burner ensures an optimal air to fuel ratio, supporting the high turndown ratios found in the Lochinvar Knight and A. O. Smith boiler series. Built to industrial grade standards, the assembly is compatible with both