Fenwal 35-655930-001 Ignition Control

The Fenwal 35-655930-001 is a 24VAC direct spark ignition control designed for high-performance gas-fired heating systems. This microprocessor-based module features a 15-second ignition trial and a 30-second pre-purge cycle to ensure safe gas pressure stabilization before electrode discharge. As a single-rod sensing unit, it utilizes flame rectification to monitor combustion, providing a 0.8 microamp minimum flame current threshold. The multi-try ignition sequence includes three attempts before reaching a system lockout state, enhancing reliability in cold-start scenarios or volatile environmental conditions. This control is engineered for intermittent pilot and direct spark applications, featuring 1/4-inch quick-connect terminals for streamlined field installation. Its robust diagnostic capabilities include an LED indicator to streamline troubleshooting of flame signal failures or internal hardware faults. This module is a direct replacement for various OEM controls in commercial furnaces and boilers where precision timing and transient voltage protection are non-negotiable requirements.

• Microprocessor Control: Delivers precise timing and sequence logic for consistent burner operation and reduced nuisance outages.
• Three-Try Logic: Increases system uptime by allowing multiple ignition attempts before entering a manual or timed reset lockout.
• Remote Flame Sensing: Compatible with single-rod or dual-rod configurations to verify flame rectification within milliseconds.
• Safe Start Self-Check: Automatically verifies internal circuitry and components prior to each heating cycle to prevent unsafe startups.
• Diagnostic LED: Provides immediate visual feedback on system status, simplifying HVAC troubleshooting for field technicians.

Is the Fenwal 35-655930-001 compatible with LP and Natural Gas?
Yes, this ignition module is designed to operate with both regulated Natural Gas and Liquid Propane systems, provided the correct burner orifices and valves are utilized.

What are the voltage requirements for the 35-655930-001?
The unit operates on a standard 24VAC 60Hz transformer input. Ensure the control circuit provides at least 18VAC under load to prevent intermittent relay chatter or logic errors.

Can this replace older Fenwal non-microprocessor series?
In most cases, yes. This unit functions as a technical upgrade for several legacy series with similar pre-purge and trial-for-ignition timings, though terminal layouts should be verified against the original wiring schematic.

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.