the 100277757 is the current manufacturer-designated replacement for the ARM1002 and 100133537 modules

For technicians service-managing older hydronic systems

suitable for air

Can this controller replace an older Series 90 mechanical controller

Enhanced System Stability: Designed to handle inductive loads common in boiler ignition sequences and fan control applications

Lochinvar & A.O. Smith 100208762 Gasket L99H008 the 100277757 is the currentThe Lochinvar & A. O. Smith 100208762 Gasket is a critical high temperature seal designed specifically for burner sight glass assemblies in high efficiency condensing boilers and water heaters. As a direct OEM replacement part, it ensures a gas tight seal between the observation port and the combustion chamber, preventing dangerous flue gas leakage and maintaining proper combustion cavity pressure. This industrial grade gasket is engineered to