Fenwal 35-605601-105 Control

The Fenwal 35-605601-105 is a 24VAC microprocessor-based Direct Spark Ignition (DSI) control designed specifically for precision gas burner management in commercial and industrial HVACR applications. This intermittent ignition control features a 15-second pre-purge cycle to ensure the combustion chamber is cleared of residual gases before ignition attempts, enhancing safety and system reliability. With a 10-second Trial for Ignition (TFI) period, the module provides robust ignition performance even in demanding environments. The Fenwal 35-60 series utilizes a single probe for both spark ignition and flame sensing, streamlining the wiring process for field technicians. It is a critical component for maintaining stable 100% shut-off safety in the event of a flame failure. This control module is engineered for compatibility with various DSI gas furnace systems and boilers, providing a reliable replacement solution for older Fenwal 24V ignition modules requiring precise timing sequences and high-output voltage for consistent spark gaps.

• Microprocessor Control: Delivers precise timing for pre-purge and TFI sequences to prevent nuisance lockouts.
• Single Probe Design: Combines spark and flame sensing into one component for simplified installation and troubleshooting.
• Safe Start Logic: Conducts internal self-checks for flame presence or internal faults before initiating each heating cycle.
• Direct Replacement: Common footprint and terminal layout for Fenwal 35-60 legacy ignition controls.

Common Questions:

What does the 15-second pre-purge do for the system?
The 15-second pre-purge clears the heat exchanger of any unburned gas or combustion byproducts before the spark is energized, preventing delayed ignition occurrences.

Can I use this module on a system that uses separate ignition and sensing electrodes?
This specific 24V DSI module is configured for local sensing (single probe), but can often be adapted for remote sensing if the system wiring supports the shared flame signal path.

What is the significance of the 10-second TFI?
The Trial for Ignition is the window the control allows for a flame to be established and sensed. A 10-second TFI provides a standard window for gas valve opening and flame rectification feedback.

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.