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efficient operation
High-Pressure Reliability: Rated for high-pressure water systems
a different trim material is required
This pneumatic room thermostat typically operates on a 20 psig nominal supply
This negative pressure switch provides the critical safety feedback required to authorize the ignition sequence
Fenwal 35-605601-201 Control R-410A efficient operationThe Fenwal 35 605601 201 is a high performance 24V Direct Spark Ignition (DSI) control module engineered for precise burner sequencing in gas fired heating systems. This microprocessor based unit utilizes standard 24 VAC input and features a fixed 30 second pre purge period followed by a 4 second trial for ignition (TFI) to ensure safe and efficient combustion. Designed for reliability in the field, it includes on board LED diagnostics for rapid