Lochinvar & A.O. Smith 100290352 Limit 321702-401 The contacts are rated for

The contacts are rated for 35 amps at 277 VAC

Industrial-Grade Build: Engineered for continuous duty cycles in high-temperature heating and water supply systems

common stressors in high-cycle commercial climate control systems

It features a 1-second prepurge (1sPP) to clear the combustion chamber and a 90-second continuous trial for ignition (TFI) to provide a stable spark for reliable burner engagement

The top-mounted manual selector—with Off

Lochinvar & A.O. Smith 100290352 Limit 321702-401 The contacts are rated forThe Lochinvar & A. O. Smith 100290352 Limit Switch is a critical safety component designed for high performance hydronic and domestic hot water systems. This 220 degree high limit switch acts as a primary fail safe, monitoring internal temperatures to prevent thermal runaway. Engineering specifications confirm this is a manual reset limit switch, requiring a technician's physical intervention to restore operation after a tripa vital feature for