Fenwal 35-615526-115 Control

The Fenwal 35-615526-115 is a robust 24VAC Direct Spark Ignition (DSI) control engineered for high-demand HVACR applications. This microprocessor-based module is designed for precise sequence timing and reliable performance in gas-fired heating equipment. As a 3-try ignition control, it offers multiple ignition attempts to ensure flame establishment, reducing nuisance lockouts. The technical profile includes a 15-second pre-purge period to clear the combustion chamber and a 10-second trial for ignition (TFI) windows. Built with integrated flame sensing circuitry, the control monitors the presence of the flame throughout the heating cycle. Its design prioritizes HVAC troubleshooting efficiency, featuring diagnostic LED indicators that assist technicians in identifying system faults rapidly. This Fenwal DSI module is a frequent OEM replacement part for commercial water heaters, boilers, and furnaces, ensuring seamless gas valve control and maintaining system safety protocols without compromising uptime in the field.

• Multi-Try Ignition Strategy: Features a 3-try sequence that improves reliability in environments with variable gas pressure or environmental interference.
• Integrated Diagnostics: Internal LED provides immediate fault code feedback, streamlining the maintenance process for field technicians.
• Precise Timing Parameters: Hard-coded 15-second pre-purge and 10-second TFI ensure strict adherence to combustion safety standards.
• Durable Construction: Microprocessor-based logic provides stable timing and flame signal monitoring under high-temperature conditions.
• Universal Compatibility: Serves as a direct replacement for various Fenwal and third-party 24V DSI controls in commercial heating units.

Is the Fenwal 35-615526-115 compatible with 120V systems?
No, this specific control is designed for 24VAC 50/60Hz circuits only. Attempting to apply line voltage will damage the internal circuitry.

What does a lockout indicate on this module?
A lockout occurs if a flame is not detected within the 10-second TFI after the three ignition attempts. This is often caused by a faulty electrode, poor grounding, or a defective gas valve.

Can I use this control for intermittent pilot systems?
No, this unit is dedicated to Direct Spark Ignition. It does not have the necessary terminals or logic to manage a pilot gas valve or pilot flame sensing sequence.

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.