Fenwal 35-725206-115 Control

The Fenwal 35-725206-115 is a high-performance 120V Direct Spark Ignition (DSI) control specifically engineered for precision firing in gas-fired heating equipment. This microprocessor-based module is designed for reliability in demanding environments, featuring a 3-trial ignition sequence (3TRY) to ensure consistent burner operation even in challenging conditions. The timing logic is factory-set with a 15-second pre-purge (15sPP) to clear the combustion chamber and a 10-second trial-for-ignition (10sTFI), providing a robust safety window for flame establishment. As a veteran-grade Fenwal ignition module, it utilizes proprietary DETECT-A-FLAME technology for sensitive flame monitoring and nuisance lockout prevention. The potted enclosure offers superior protection against extreme vibration and moisture, making it an ideal choice for commercial cooking equipment, infrared heaters, and industrial HVACR applications. This DSI controller ensures 120VAC gas ignition safety with integrated LED diagnostics for rapid field troubleshooting and minimizes downtime for contractors managing high-output burner systems.

• Enhanced Durability: The potted circuit board design protects internal components from washdown, grease, and heavy vibration.
• Precise Ignition Timing: Microprocessor control delivers +/- 5% timing accuracy, far surpassing older analog Fenwal 120V controls.
• Multitrial Reliability: The 3-trial ignition logic provides inter-purge cycles between attempts to improve success in cold starts.
• Diagnostic Efficiency: An on-board LED diagnostic light identifies lockout causes, such as airflow faults or lost flame signals, without extra tools.
• Flexible Sensing: Supports both single spark and sense or remote flame sensing configurations for diverse burner layouts.

• How do I resolve a 3-flash lockout code? A 3-flash signal typically indicates a lockout fault after the three trials for ignition. Verify gas supply pressure, check the high-voltage cable for cracks, and ensure the electrode gap is set to 1/8 inch.
• Can this replace older Fenwal analog modules? Yes, the 35-72 series is the professional upgrade for many legacy 05-13 and 05-14 controls, though you should verify the multi-pin connector harness compatibility.
• How do I measure the flame signal on this board? Use a DC micro-ammeter connected to the FC+ and FC- test pins; a healthy signal should read 1.0 µA DC or higher for consistent operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.