Description
The Fenwal 35 605506 227 is a 24 VAC Direct Spark Ignition (DSI) control module engineered for reliable ignition sequencing and advanced flame supervision in gas fired appliances. This microprocessor based control unit is designed to deliver precise timing, safety features, and repeatable performance in residential, commercial, and industrial heating systems.
Key Features
- Designed for 24 VAC DSI operation in gas fired furnaces, boilers, water heaters, and similar equipment.
- 30 second pre purge cycle helps clear combustion gases before ignition for safer startup.
- 15 second trial for ignition (TFI) period for efficient burner ignition timing.
- Three ignition attempts (3 try) to improve reliability before lockout.
- Microprocessor based design for precise timing sequences and system control.
- Remote or local flame sensing capability to accommodate different installation needs.
- On board diagnostic LEDs simplify troubleshooting and fault identification.
- Compatible with natural gas, LP gas, and manufactured gases in various applications.
- OEM grade construction for demanding HVAC and combustion system environments.






