Lochinvar & A.O. Smith 100278117 Gasket 321894-709 this unit features a shunt

this unit features a shunt to maintain circuit continuity while switching the primary power leg

as it may damage the internal thin-film sensor

Smith commercial boilers and high-recovery water heaters

it serves as a drop-in replacement for numerous legacy furnace and AC models

Lochinvar & A.O. Smith 100278117 Gasket 321894-709 this unit features a shuntProfessional grade maintenance requires precision components that ensure a gas tight seal and reliable combustion performance. The Lochinvar & A. O. Smith 100278117 Gasket Set is a comprehensive OEM replacement part specifically engineered for high efficiency condensing boilers and water heaters. As a veteran technician, you know that reuse of flat gaskets or fiber seals during a heat exchanger service leads to nuisance lockouts and dangerous flue gas