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Engineered to withstand rigorous high-temperature cycles
Is the Teflon stem packing compatible with treated boiler water
reducing time on the job site during emergency repairs
while the high side range spans 100 to 425 psi
or excessive noise during the start-up cycle indicate the blade is out of balance or nearing failure
Fenwal 35-615521-203 Module 30067439-890 Engineered to withstand rigorous high-temperatureThe Fenwal 35 615521 203 is a 24v DSI ignition module engineered for high performance gas fired appliances including furnaces, boilers, and water heaters. As a microprocessor based control, it provides precise sequencing and safety monitoring for direct spark ignition systems. This specific model features a 30 second pre purge to clear the combustion chamber and a 7 second trial for ignition (TFI) to ensure reliable burner startup. Built with an