Fenwal 35-605606-223 Control

The Fenwal 35-605606-223 Control is a microprocessor-based Direct Spark Ignition (DSI) module engineered for precise timing and safety in gas-fired heating systems. Designed for 24VAC 50/60Hz applications, this DSI ignition board monitors burner operation using advanced remote flame sensing technology to ensure stable performance and rapid response to flame failure. This specific model features a 30-second pre-purge cycle to clear the combustion chamber and a 30-second inter-purge to maintain safety during retry sequences. It provides a 7-second trial for ignition (TFI) with up to three ignition attempts before entering a secure lockout state, which must be manually reset by interrupting power. As a direct cross-reference for S1-7995-3081, this control is housed in a fire-retardant Noryl gray enclosure and includes an integrated blower relay and diagnostic LED for efficient field troubleshooting. Its robust design is suitable for residential furnaces, boilers, and commercial water heaters requiring dependable electronic spark control.

Key Benefits for Technicians

• Direct Cross-Reference: Serves as the precise replacement for S1-7995-3081 and Evcon systems, reducing the need for extensive truck stock.
• Microprocessor Precision: Delivers repeatable 7-second Trial for Ignition and 30-second purge timings, eliminating the variability of older analog controls.
• Enhanced Diagnostics: Built-in LED status indicator allows for immediate identification of system faults or lockout conditions.
• Safe System Operation: Features a 3-try ignition sequence and 100% shutoff upon flame failure to protect equipment and property.
• Durable Construction: The fire-retardant Noryl housing protects internal circuitry from heat and humidity in demanding HVAC environments.

Common Questions & Answers

How do I reset the control after a lockout occurance?
The unit enters lockout after three unsuccessful ignition attempts. To reset, interrupt the 24VAC power supply to the module for at least five seconds before restoring power.

Is this module compatible with both Natural Gas and LP systems?
Yes, the 35-605606-223 is designed for use with natural, manufactured, and liquefied petroleum (LP) gases, provided the mechanical burner components are properly configured.

Does this board support a combustion blower relay?
Yes, this specific model include an integrated blower relay to manage the pre-purge and post-purge cycles for the combustion air inducer.

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.