Fenwal 35-605606-227 Control

The Fenwal 35-605606-227 is a microprocessor-based 24V Direct Spark Ignition (DSI) control engineered for precision timing and robust burner sequencing in commercial and residential gas-fired appliances. This ignition control module features a 30-second pre-purge period to clear the combustion chamber and a 15-second Trial for Ignition (TFI) to ensure reliable flame establishment. Designed with three ignition trials, it minimizes nuisance lockouts by attempting to light the burner up to three times before entering a secure lockout state. The unit utilizes DETECT-A-FLAME flame sensing technology, supporting both local and remote sensing configurations for maximum field flexibility. Built into a durable Noryl enclosure, the Fenwal 35-60 control includes on-board diagnostic LEDs for rapid troubleshooting of airflow faults or flame failures. It serves as a reliable drop-in replacement for Johnson G76x series controls, maintaining the same mounting footprint and wiring interface for seamless contractor installations in furnaces, boilers, and water heaters.

• System Reliability: Microprocessor-driven 30-second pre-purge and 15-second TFI ensure consistent ignition sequencing and safe operation.
• Optimized Ignition: The 3-try ignition logic reduces service calls by facilitating successful starts under varying gas pressure or environmental conditions.
• Advanced Diagnostics: Multi-color LED error codes allow technicians to quickly identify issues like pressure switch failures or weak flame signals.
• Direct Compatibility: Designed to replace Johnson Controls G76 series, making it a versatile HVAC replacement part for diverse gas-fired equipment.
• Field Flexibility: Supports remote flame sensing (0.7 µA minimum) and includes dedicated flame current test pins for accurate multi-meter readings during commissioning.

What does a steady LED light indicate on the Fenwal 35-605606-227?
A steady LED typically indicates an internal hardware or software fault. If this persists after cycling the 24VAC input, the control may require replacement.

How do I reset the module after an ignition lockout?
Lockout recovery is achieved by resetting the thermostat or removing 24V power for at least 5 seconds. This specific model also features a 1-hour automatic reset if the call for heat remains active.

Can this control be used with both Natural Gas and LP systems?
Yes, the Fenwal 35-605606-227 is compatible with Natural, Manufactured, and LP gas types, provided the burner and electrode assemblies are correctly configured.

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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.