Fenwal 35-705701-103 Module

The Fenwal 35-705701-103 is a high-performance 120V Direct Spark Ignition (DSI) control module engineered for the demanding requirements of commercial and industrial heating systems. This microprocessor-based ignition control manages the gas valve, monitors the flame sense, and provides a 15-second pre-purge cycle to exhaust residual gasses before the 7-second Trial for Ignition (TFI) begins. Designed as a robust solution for furnaces, boilers, and unit heaters, this 120 VAC DSI module eliminates the need for standing pilots, significantly improving system efficiency. Its single-rod flame sensing or remote sensing capabilities provide flexible field installation options. For technicians troubleshooting burner sequences, the Fenwal 35-70 series offers precise timing logic and safety shut-off protocols that meet rigorous industry standards for flame supervised control systems. Replace failing legacy controls with this genuine Fenwal ignition module to restore reliable combustion performance and safe operation.

• Enhanced Safety Timing: Features a dedicated 15-second pre-purge and a precise 7-second TFI window to ensure safe burner light-off.
• High-Voltage Reliability: Specifically designed for 120V ignition systems, providing a consistent high-energy spark for rapid combustion.
• Multi-Application Versatility: Compatible with a wide range of gas-fired equipment including commercial water heaters and infrared heaters.
• Robust Construction: Encapsulated electronics protect the internal circuitry against vibration and moisture commonly found in HVAC/R environments.
• Direct Replacement: This 35-705701-103 model serves as a reliable replacement for specific Fenwal 35-70 series configurations.

Is the Fenwal 35-705701-103 compatible with 24V systems?
No, this specific model is a 120 VAC ignition control. Refer to the 35-60 series for 24V requirements.

What does the 15-second pre-purge accomplish?
The pre-purge period allows the inducer fan to clear the combustion chamber of any unburned gas before the sparking sequence begins, ensuring a safe start-up.

Does this module support local or remote flame sensing?
The Fenwal 35-705701-103 supports both local (internal) and remote flame sensing, allowing for flexibility depending on your electrode configuration.

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.