Fenwal 35-605605-115 Control

The Fenwal 35-605605-115 is a 24V Direct Spark Ignition (DSI) control module engineered for high-demand gas-fired applications, including commercial cooking equipment and unit heaters. This microprocessor-based ignition control serves as a direct Johnson Controls G76x replacement, maintaining the original footprint and wiring configuration for efficient field service. The technical sequence consists of a 15-second prepurge, a 10-second Trial for Ignition (TFI), and a 3-try ignition system to ensure secure combustion cycles. With an operating temperature range of -40°F to +176°F and conformal coating for moisture resistance, this module is built for rooftop units and high-heat environments. The diagnostic LED indicator provides instant fault code feedback, while current sensing technology delivers a flame sensitivity of ≥0.3 µA and a response time of ≤0.8 seconds. This Fenwal 35-60 series controller effectively manages the gas valve and spark transformer to provide consistent intermittent pilot ignition or direct spark operation in natural or LP gas systems.

Key Benefits for Technicians:

• Direct Replacement: Matches Johnson Controls G760, G765, and G76x series specifications for a seamless drop-in installation without cabinet modifications.
• Enhanced Troubleshooting: Integrated diagnostic LED simplifies identifying lockout conditions or flame signal issues, reducing time on the job site.
• Robust Environmental Protection: Conformal coated circuitry protects against 95% relative humidity and non-condensing moisture common in commercial HVACR.
• Dual Sensing Options: Supports both local (single rod) and remote (dual rod) flame sensing to fit various burner configurations.
• Automatic Reset: Features a 5-minute or 1-hour auto-reset following a lockout, preventing unnecessary service calls for nuisance trips.

Common Questions:

Is the Fenwal 35-605605-115 compatible with 120V systems?
No, this specific control is designed for 24 VAC (18-30 VAC) input only. Wiring it to a 120V source will damage the transformer and the internal circuitry of the module.

How do I resolve a lockout on this module?
A lockout occurs after three failed ignition trials. You can reset the control by cycling the 24V power or by waiting for the automatic reset period. Checking the LED code will confirm if the issue is a weak flame signal or a gas valve failure.

Can this be used with LP gas?
Yes, the Fenwal 35-605605-115 is compatible with Natural, LP, and manufactured gases. Always ensure your gas valve and burner orifices are correctly sized for the specific fuel type being used.

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.