Fenwal 35-605506-113 Control

The Fenwal 35-605506-113 is a 24VAC Direct Spark Ignition (DSI) control engineered for precision gas valve sequencing in commercial and residential heating applications. This micro-processor based ignition module features a 30-second prepurge cycle to ensure proper combustion chamber clearing and a 7-second trial for ignition (TFI) windows. Built with Fenwal 35-60 series reliability, this unit utilizes a 3-try ignition sequence with a 15-second inter-purge, followed by a 1-hour automatic reset or lockout depending on the detected flame signal. It is designed for single rod flame sensing or remote sensing and provides a high-voltage spark for reliable burner ignition. This control is a common HVAC replacement part for diverse gas-fired equipment, including furnaces, boilers, and water heaters. Technicians should verify terminal configurations and input voltage (24VAC 50/60Hz) to ensure field compatibility. This hot surface ignition alternative (DSI) optimizes system uptime by monitoring flame rectification signals with high sensitivity.

• Multi-Try Strategy: The 3-try ignition sequence reduces nuisance lockouts by attempting reignition if the first cycle fails to prove flame.
• Prepurge Cycle: Integrated 30-second prepurge enhances safety by clearing residual gases before the spark ignition sequence begins.
• Advanced Diagnostics: On-board LED provides immediate fault code feedback for troubleshooting flame sensing issues or internal module failure.
• Robust Construction: Enclosed design protects the microprocessor circuitry from contaminants and moisture common in mechanical rooms.
• Standardized Footprint: Direct replacement for various OEM gas ignition controls, simplifying field service and inventory management.

What does the 3-try sequence signify for field diagnostics?
The control will attempt to light the burner up to three times. If a flame signal is not detected via the flame rod after the third 7-second TFI, the unit enters a safety lockout mode to prevent gas accumulation.

Can this module be used for both LP and Natural Gas systems?
Yes, as a direct spark ignition control, it manages the gas valve and spark sequence regardless of gas type, provided the valve and burner orifices are correctly sized for the application.

What is the proper input voltage for the 35-605506-113?
This module requires a steady 24VAC power supply. Voltage drops below the specified threshold can lead to intermittent spark failure or erratic diagnostic codes.

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.