Fenwal 35-705600-005 Control

The Fenwal 35-705600-005 is a professional-grade 120 VAC Direct Spark Ignition (DSI) control designed for precise burner management in gas-fired equipment. This microprocessor-based module replaces older analog systems, offering significantly improved timing accuracy and robust flame sensing capabilities. Engineered with a 10-second Trial for Ignition (TFI) and an integrated 120V gas valve relay, it ensures reliable startup and consistent flame supervision for commercial heaters, crop dryers, and industrial furnaces. The 35-705600-005 ignition module features local sense technology and on-board LED diagnostics, allowing technicians to quickly identify faults such as ignition lockout or flame signal loss. Built for demanding environments, the board includes a B. GND terminal to eliminate common grounding issues and minimize nuisance lockouts, even in high-vibration applications. This OEM-spec Fenwal DSI control provides a 0.8-second flame failure response time and multiple ignition trials to maintain system uptime while adhering to strict safety protocols for modern HVACR installations.

• Precision Microprocessor Control: Delivers +/- 5% timing accuracy for repeatable ignition sequences and purge cycles.
• Advanced Diagnostics: On-board LED provides immediate error codes for faster troubleshooting and reduced downtime.
• Enhanced Flame Stability: Incorporates a dedicated burner ground terminal to prevent signal loss from neutral or polarity issues.
• Industrial Durability: Conformal-coated circuitry protects the module against moisture and temperature extremes in mechanical rooms.
• Seamless Integration: Compact footprint and standardized 1/4" quick-connect terminals simplify field replacement of legacy 05-14 series controls.

What is the proper way to measure flame current on this module?
Technicians should use a DC micro-ammeter connected to the FC+ and FC- test pins. A stable reading of 1.0 µA DC or higher is required for reliable operation. Alternatively, a voltmeter can be used, where 1.0 VDC equals 1.0 µA.

How do I reset the control after an ignition lockout?
Lockout recovery is achieved by cycling the 120 VAC power supply or lowering the thermostat below ambient temperature for at least 5 seconds. The module also features an automatic one-hour reset if the call for heat remains active.

Can this unit be mounted in any orientation?
Yes, the 35-70 series is not position-sensitive and can be mounted vertically or horizontally. Ensure it is secured to a surface with #6 sheet metal screws in an area minimizing excessive vibration.

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.