Fenwal 35-615957-115 Control

The Fenwal 35-615957-115 Control is a microprocessor-based 24V DSI Calcana Ignition Control engineered for high-demand gas-fired heating systems. This direct spark ignition module serves as the official replacement for 35-615925-115, providing seamless integration into Calcana infrared heaters and commercial burner assemblies. Operating on 24 VAC with a 1/4 HP combustion blower relay, it features a 15-second pre-purge, 15-second inter-purge, and a 10-second trial for ignition (TFI) to ensure safe combustion cycles. The rugged design includes an LED diagnostic indicator for real-time troubleshooting of airflow faults, flame sensing errors, and system lockouts. Designed for precision, this Fenwal ignition module utilizes flame rectification technology with a minimum sensitivity of 0.7µA and includes flame current test pins for accurate field diagnostics. This OEM-grade control is essential for maintaining the performance of industrial boilers, furnaces, and outdoor radiant heaters in harsh environments.

• Direct Compatibility: Drop-in 35-615925-115 replacement ensures zero downtime during field repairs of Calcana units.
• Advanced Diagnostics: Onboard LED provides instant fault codes, reducing diagnostic time for lockout and airflow issues.
• Superior Safe Start: Integrated 15-second pre-purge clears the combustion chamber of residual gas before the spark sequence begins.
• Robust Performance: Conformal coated circuitry offers moisture resistance up to 95% R.H., ideal for outdoor patio heating applications.
• Precision Ignition: High-voltage DSI technology delivers consistent spark at line frequency for reliable burner engagement in cold starts.

What does it mean when the LED flashes on my Fenwal control?
The LED indicator signifies system status. A steady light usually indicates an internal hardware fault, while specific pulse patterns identify airflow failures (1 flash), flame sense errors (2 flashes), or ignition lockout (3 flashes).

Can I use this control with systems other than Calcana?
While engineered for 24V Calcana systems, this DSI ignition control is compatible with various commercial gas-fired appliances requiring 24 VAC input and local/remote flame sensing, provided the timing and blower ratings match.

How do I reset the module after a safety lockout?
A manual reset is required by cycling the thermostat or the 24V power supply. The module also features an automatic one-hour reset function to attempt re-ignition after a temporary lockout condition.

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.