Description
The Fenwal 35 605606 115 24 VAC DSI Ignition Control is a professional-grade 24 VAC microprocessor-based Direct Spark Ignition (DSI) control module designed for gas-fired HVAC systems, furnaces, boilers, water heaters, and other combustion appliances. Built to deliver reliable and safe ignition performance, this module combines precision timing logic, flame sensing, and safety diagnostics — making it an ideal choice for technicians and maintenance professionals.
Key Features
- Direct Spark Ignition (DSI): Generates a controlled spark for main burner ignition without a standing pilot system, enhancing energy efficiency and reliability.
- Microprocessor Timing Logic: Ensures repeatable ignition sequencing with custom timing for pre-purge, inter-purge, and trial for ignition (TFI) operations.
- Custom Purge Timings: Typical configuration includes a 15-second pre-purge and 15-second inter-purge to prepare the combustion chamber before ignition.
- 10-Second Trial for Ignition: Provides a controlled window for flame establishment before lockout — helping improve ignition success.
- Multiple Ignition Attempts: Designed for three ignition trials before a lockout condition to maximize operational reliability.
- Detect-A-Flame® Flame Sensing: Accurate flame detection helps ensure safe operation by verifying combustion presence.
- On-Board Diagnostics: LED indicators aid in troubleshooting and reduce service time for HVAC professionals.
- Robust Construction: Conformal coating and durable components help withstand typical HVAC environment conditions such as humidity and vibration.
