Fenwal 35-605506-023 Control

The Fenwal 35-605506-023 is a 24 VAC Direct Spark Ignition (DSI) control module engineered for precise burner sequencing in gas-fired equipment. This microprocessor-based unit delivers repeatable timing for industrial furnaces, boilers, and water heaters. As a 3-try ignition control, it enhances system reliability by attempting three trials for ignition (TFI) before entering a safety lockout. The integrated 30-second inter-purge cycle ensures the combustion chamber is cleared of residual gas between attempts, maintaining strict safety protocols. Utilizing DETECT-A-FLAME technology, the module provides high-sensitivity flame supervision, compatible with local or remote sensing configurations. The hardware features a durable Noryl gray enclosure and conformal-coated circuitry to withstand high-humidity environments and mechanical vibration. Diagnostic LED status indicators allow for rapid field troubleshooting by identifying fault codes such as airflow failures or flame signal loss. This OEM-grade module supports natural, LP, and manufactured gases, making it a versatile drop-in for diverse HVACR applications.

• Enhanced Reliability: The 3-try ignition sequence reduces nuisance lockouts in demanding environments.
• Precise Safety Timing: Microprocessor control provides a fixed 30-second inter-purge and a 7-second TFI for consistent operation.
• Advanced Diagnostics: On-board LED simplifies DSI module troubleshooting by displaying specific flash codes for system faults.
• Remote Flame Sensing: Supports versatile flame supervision setups, allowing for flexible electrode placement in complex burner assemblies.
• Robust Construction: Enclosed in a flame-retardant Noryl housing designed for temperatures ranging from -40°F to 176°F.

How do I reset the Fenwal 35-605506-023 after a lockout?
Manual reset is achieved by cycling the thermostat bridge or removing the 24 VAC power source for at least 5 seconds. If the unit remains in lockout, check the diagnostic LED for hardware failure codes.

What is the minimum flame current required for operation?
The integrated flame sensing circuit requires a minimum of 0.7 microamps to maintain the gas valve relay. Use the FC+ and FC- test pins to verify the signal strength during the ignition cycle.

Can this module replace single-try DSI controls?
Yes, provided the voltage and timing specifications align with the appliance manufacturer's requirements. The Fenwal 35-60 series is designed as a high-performance upgrade for older ignition systems.

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.