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While some technicians use the 510-312-322 (5-3/4" diameter) galvanized version
Always verify the fuel type on the water heater rating plate
Can I use a pressure switch with a different WC rating
preventing safety hazards in boilers
as well as high-capacity 926-1826 units
Fenwal 35-665725-121 Ignition Control Freon While some technicians use theThe Fenwal 35 665725 121 Ignition Control is a microprocessor based Direct Spark Ignition (DSI) module designed for the precise management of gas fired heating systems. This 24VAC ignition control provides a robust three try ignition sequence, incorporating a 15 second pre purge, 30 second inter purge, and 30 second post purge to ensure safe combustion cycles. Engineered for high demand environments, it features a built in combustion blower relay and
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