Fenwal 35-705701-001 Control

The Fenwal 35-705701-001 is a 120V Direct Spark Ignition (DSI) control engineered for high-demand gas burner applications. Featuring a microprocessor-based design, this unit delivers precise 4-second Trial for Ignition (TFI) sequences and consistent purge timing to ensure safe combustion. As a potted ignition control, it is specifically built to handle washdown environments and extreme mechanical vibration, making it a standard choice for construction heaters, crop dryers, and commercial cooking equipment. The board operates on 102-138 VAC and supports single spark and sense or remote flame sensing methods with a minimum flame current of 1.0 microamp. With a wide operating temperature range of -40°F to +175°F, this 120V DSI module maintains reliable gas burner control for Natural, LP, and manufactured gases. Integrated diagnostic LED indicators provide three distinct error codes, streamlining field troubleshooting for technicians. This model replaces various Fenwal 35-70 series controls in industrial heating infrastructures.

Key Benefits

• Environmental Resilience: The potted enclosure protects internal circuitry from moisture and high-vibration stresses common in agricultural heating.
• Precise Flame Supervision: Rapid flame failure response time of 0.8 seconds maximizes safety for high-output systems under 400K BTU.
• Industrial Compatibility: Features multi-pin connector and quick-connect wiring options for seamless integration into existing commercial gas burners.
• Advanced Troubleshooting: Built-in diagnostic LED and flame current test pins allow for onsite verification of signal strength without breaking the circuit.

Common Questions

What does the diagnostic LED indicate on the 35-705701-001?
The onboard LED provides codes for system lockouts, including flame signal failure or internal control faults, allowing for fast diagnostic sweeps of the direct spark ignition system.

Can this control be used in wet environments?
Yes, this specific potted version is designed to withstand washdown conditions and is conformal coated to operate in up to 95% relative humidity.

Does this unit support automatic reset?
Yes, the Fenwal 35-705701-001 includes an automatic 1-hour reset option following a lockout, or it can be manually reset via the thermostat or power supply.

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.