Fenwal 35-605601-201 Control

The Fenwal 35-605601-201 is a high-performance 24V Direct Spark Ignition (DSI) control module engineered for precise burner sequencing in gas-fired heating systems. This microprocessor-based unit utilizes standard 24 VAC input and features a fixed 30-second pre-purge period followed by a 4-second trial-for-ignition (TFI) to ensure safe and efficient combustion. Designed for reliability in the field, it includes on-board LED diagnostics for rapid troubleshooting of flame failures or hardware faults. The rugged Noryl gray enclosure and single-try ignition logic provide a stable control platform for furnaces and commercial water heaters. It employs flame rectification technology for remote flame sensing, allowing for flexible mounting configurations. For service technicians, the integrated flame current test pins enable accurate monitoring of the signal strength (microamps), ensuring the system remains above the 0.7µA threshold required for sustained operation.

• Safe Startup: Integrated 30-second pre-purge clears the combustion chamber of residual gases before the ignition cycle begins.
• Precise Control: Microprocessor circuitry delivers consistent 4-second TFI timing, reducing nuisance lockouts and improving system repeatability.
• Simplified Troubleshooting: On-board diagnostic LED indicates system status and fault codes, streamlining field service calls.
• Enhanced Durability: Housed in a fire-retardant Noryl enclosure with an edge connector design for secure, vibration-resistant electrical termination.
• Broad Compatibility: Suitable for use with natural, LP, or manufactured gases in a variety of HVACR applications.

• What is the minimum flame current required for this control? To prevent safety lockout, the 35-605601-201 typically requires a minimum flame sense signal of 0.7 microamps.
• Does this module support remote flame sensing? Yes, this DSI control is designed for remote flame sensing via the designated circuit, allowing for versatile burner alignments.
• How do I reset the unit after a lockout? A manual reset can be performed by cycling the 24V power at the thermostat or by removing power from the module for at least 5 seconds.

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.