Fenwal 35-673915-553 Ignition Module

The Fenwal 35-673915-553 Ignition Module is a high-performance 24V hot surface ignition control specifically engineered for high-output commercial and industrial gas-fired heating applications. Designed for systems exceeding 400,000 BTU, this microprocessor-based ignition control manages the sequence of operation with precision. It features a 15-second pre-purge, a 7-second trial for ignition, and an integrated combustion blower relay to ensure safe and efficient burner operation. This module continuously monitors the pressure switch, thermostat, and main burner flame, utilizing on-board diagnostics with a multi-flash LED for rapid field troubleshooting. Built to meet ASME CSD-1 standards, it supports natural, manufactured, and propane gases. The Fenwal 35-673915-553 provides three trials for ignition before non-volatile lockout, making it a reliable solution for heavy-duty HVACR environments where downtime is not an option. Professional installation by a qualified technician is required for proper flame sense signaling and system safety.

• Proven Safety: Integrated pressure switch input and flame sensing ensure the gas valve only opens when the ignition source is verified.
• Advanced Diagnostics: LED indicator provides specific flash codes for rapid identification of airflow faults, ignition lockout, or low voltage.
• High Capacity: Designed for industrial-grade appliances and large combustion chambers in excess of 400K BTU.
• System Flexibility: Robust 24 VAC control compatible with multiple gas types and featuring a dedicated combustion fan output.
• Reliable Performance: Microprocessor circuitry delivers repeatable timing sequences for pre-, inter-, and post-purge cycles.

What do the LED flash codes indicate on the Fenwal 35-673915-553?
The diagnostic LED simplifies troubleshooting: a steady ON signifies normal operation, while specific flashes identify issues such as airflow faults (1 flash), erroneous flame signals (2 flashes), or ignition lockout (3 flashes).

Is this module compatible with LP gas systems?
Yes, this ignition module is rated for use with natural gas, liquid propane (LP), and manufactured gas, provided the appliance is configured for the specific fuel type.

What are the power requirements for this ignition control?
The control operates on 18 to 30 VAC at 400mA, with output ratings for the hot surface ignitor and gas valve supporting up to 5.0A at various standard voltages.

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.