Fenwal 35-60J108-224 Control

The Fenwal 35-60J108-224 is a 24VAC direct spark ignition (DSI) control specifically engineered for high-reliability burner supervision in gas-fired heating systems. This microprocessor-based module is a primary choice for service technicians seeking a Johnson Controls G76x Series replacement, offering an identical footprint, mounting hole pattern, and terminal configuration for seamless field installation. The control logic provides a 30-second pre-purge and 30-second inter-purge to ensure the combustion chamber is clear, paired with an 8-second trial for ignition (TFI) to maintain strict safety standards.

For efficient troubleshooting, the module features on-board LED diagnostics that transmit specific Fenwal fault codes, reducing diagnostic time on the job site. It integrates DETECT-A-FLAME technology for full-time flame sensing and is compatible with both local and remote flame sense options. Built to withstand demanding environments, this HVAC ignition control board operates reliably between -40°F and 176°F. It is suitable for applications using natural gas, LP, or manufactured gases in commercial gas-fired appliances and furnaces.

• Direct G76x Series Drop-in: Matches specific JCI mounting and wiring for zero-modification replacements.
• Advanced Timing Control: Precise 30s pre-purge and 8s TFI settings ensure repeatable ignition sequences.
• Enhanced Diagnostics: Integrated LED allows for rapid identification of lockout conditions or flame signal issues.
• Flexible Sensing: Supports versatile remote or local flame sensing configurations to fit various burner designs.
• Safety Logic: Safe-start check and automatic reset options (5-minute or 1-hour) minimize nuisance service calls.

Is the Fenwal 35-60J108-224 compatible with Johnson Controls G76x ignition modules?
Yes, the "J" series is specifically designed as a drop-in replacement for the discontinued Johnson G76x series, utilizing the same wiring terminals and physical footprint.

What do the LED blink patterns indicate on this DSI control?
The on-board LED flashes specific diagnostic codes to indicate issues such as flame signal loss, internal hardware failure, or air-flow faults, enabling faster system recovery.

Does this module support multi-try ignition?
This specific configuration utilizes a 30-second inter-purge between trials, providing a controlled sequence to safely attempt burner ignition before entering a lockout state.

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.