Raypak 007374F Module

The Raypak 007374F is a 24V hot surface ignition (HSI) module, cross-functional and 100% identical to the Fenwal 35-673902-561. This microprocessor-based control is engineered for precise ignition sequence management in high-capacity Raypak boilers and pool heaters, specifically the Hi Delta 302A-902A and 992A-2342A series. Operating on a 24VAC input at approximately 350mA, this direct spark ignition alternative manages the entire startup process, including pre-purge, igniter heat-up, and flame sensing. The 35-673902-561 model features integrated diagnostic LED indicators for rapid field troubleshooting, ensuring technicians can quickly identify flame failure or airflow switch issues. Its robust design is built to withstand high ambient temperatures of up to 165°F while maintaining repeatable timing for gas valve activation and safety shutoff. By utilizing OEM ignition controls, contractors ensure seamless compatibility with existing wire harnesses and flame sensor electrodes, maintaining system integrity in demanding commercial heating environments.

• Direct OEM Replacement: Fully interchangeable with Raypak 007374F and Fenwal 35-673902-561 for simplified inventory and installation.
• Advanced Diagnostics: On-board LED status indicators provide immediate feedback on ignition lockouts or hardware faults.
• Precision Sequencing: Microprocessor-controlled timings for pre-purge and trials for ignition ensure safe, reliable combustion cycles.
• Heavy-Duty Construction: Rated for high-temperature HVACR environments, supporting long-term operation in Raypak Hi Delta systems.

Is the Raypak 007374F compatible with other Fenwal series modules?
This specific module is a drop-in replacement for the 35-673902-561. Always verify the individual model number suffix, as timing variations (pre-purge/TFI) vary across the 35-67 series.

What are the power requirements for this ignition control?
The module requires a stable 24VAC (18-30VAC range) 50/60Hz supply, typical of a Class 2 transformer found in most commercial gas heaters.

How do I troubleshoot a 3-flash LED error code?
A 3-flash sequence typically indicates a flame sense failure where the pilot/burner ignited but the signal was lost or never detected by the electrode.

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.