This kit is specifically for the 240RA8 series

this plunger assembly is built to withstand the rigorous duty cycles of industrial HVACR systems where precise linear modulation is required

requiring standard brazing techniques for installation

eliminating the safety risks associated with "universal" adjustables that often fail to meet the delicate tolerances required for high-efficiency condensing furnaces

Lochinvar & A.O. Smith 100135290 Burner Assembly 30067439-890 This kit is specifically forThe Lochinvar and A. O. Smith 100135290 Burner Assembly is a direct OEM replacement engineered for high efficiency commercial water heaters and boilers. This assembly, cross referenced as BNR3400, features an integrated pressure tap for precise manifold pressure adjustments and diagnostic testing. Designed for optimized gas air mixing, this replacement burner assembly ensures stable flame patterns and consistent thermal output in demanding hydronic