Fenwal 35-705700-001 Control

The Fenwal 35-705700-001 is an industrial-grade 120V Direct Spark Ignition (DSI) control module designed for a variety of gas-fired appliances including commercial cooking equipment, boilers, and infrared burners. Utilizing a microprocessor control circuit, this unit delivers precise timing and consistent operating sequences for reliable burner starts. This ignition control module is configured for a 4-second Trial for Ignition (TFI) and operates as a single-attempt (1-try) system, entering lockout if the flame is not established within the designated period to ensure maximum safety. It features no pre-purge or inter-purge (NoPP) and utilizes local flame sensing through the principal of flame rectification. For field troubleshooting, the on-board diagnostics include an LED indicator to identify fault codes, along with flame current test pins meant for a standard micro-ammeter. Built for harsh HVACR environments, the solid-state design and conformal coating protect the Fenwal 35-70 series components from vibration and moisture.

Key Benefits:

• Precision Timing: The microprocessor logic provides repeatable 4-second TFI sequences, eliminating the inconsistencies of older analog controls.
• Diagnostic Efficiency: Built-in LED output and accessible flame current test pins allow technicians to diagnose issues rapidly without disconnecting the module.
• Enhanced Safety: High-performance flame sensing immediately detects a loss of combustion, shutting down the gas valve in under 0.8 seconds.
• Flexible Mounting: The board is not position-sensitive, allowing for horizontal or vertical installation in tight equipment cabinets.
• Broad Compatibility: Rated for temperatures up to 160°F (71°C) and compatible with most 120 VAC gas-fired systems.

Common Questions:

• How do I resolve a 3-flash LED error code? A 3-flash signal typically indicates ignition lockout. Check the spark gap on the electrode (should be 0.125" ± 0.031"), verify gas pressure, and ensure there is proper grounding between the module and the burner.
• What is the minimum flame current for reliable operation? The 35-705700-001 requires a minimum of 1.0 µA for stable operation. If the signal drops below this threshold, the module will de-energize the gas valve.
• Can I use this for pilot-ignited systems? No, this is a Direct Spark Ignition (DSI) module; it is engineered to ignite the main burner directly without a standing pilot.

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.