FENWAL 35-655312-021 Automatic Ignition System Control Module User Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of the FENWAL 35-655312-021 Automatic Ignition System Control Module. This module is designed to manage the ignition sequence in heating appliances, ensuring reliable and safe operation.

Please read this manual thoroughly before attempting any installation or service. Keep this manual for future reference.

2. Safety Information

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.

• Always disconnect power to the appliance before installing or servicing the control module.
• Installation and service must be performed by a qualified service technician.
• Ensure all wiring connections comply with local and national electrical codes.
• Do not operate the appliance if any part has been submerged in water. Immediately call a qualified service technician to inspect the appliance and replace any part of the control system that has been submerged.

3. Product Overview

The FENWAL 35-655312-021 is an automatic ignition system control module responsible for sequencing the ignition and monitoring the flame in various heating applications. It features diagnostic indicators for easy troubleshooting.

Figure 1: FENWAL 35-655312-021 Automatic Ignition System Control Module. This image displays the front of the control module, showing its diagnostic LED, model number, input voltage, and terminal connections.

4. Setup and Installation

Installation of this control module should only be performed by a qualified service technician.

1. Power Disconnection: Ensure all electrical power to the appliance is disconnected at the main service panel before beginning installation.
2. Remove Old Module: Carefully disconnect all wires from the existing control module, noting their positions for correct re-connection. Remove the old module from its mounting.
3. Mount New Module: Mount the FENWAL 35-655312-021 module in the same location as the old module, ensuring it is securely fastened.
4. Wiring Connections: Reconnect all wires to the new module according to the appliance's wiring diagram and the labels on the module. Pay close attention to input power (24 VAC), valve connections, and ignitor connections.
5. Verify Connections: Double-check all wiring for correct placement and secure connections.
6. Restore Power: Restore electrical power to the appliance.
7. Test Operation: Follow the appliance manufacturer's instructions to test the operation of the ignition system.

5. Operating Instructions

The FENWAL 35-655312-021 Automatic Ignition System Control Module operates automatically to manage the ignition sequence of your heating appliance. Once installed and power is supplied, the module will initiate the following sequence upon a call for heat:

• Pre-Purge: The module initiates a pre-purge cycle (0 seconds as per module label) to clear the combustion chamber.
• Ignition: After pre-purge, the ignitor is energized for a specified ignition trial period (4 seconds as per module label).
• Flame Sensing: During the ignition period, the module monitors for the presence of a flame.
• Main Burner Operation: If a flame is established, the main gas valve opens, and the burner operates.
• Interpurge: If the flame is lost during operation, the module may initiate an interpurge cycle (30 seconds as per module label) before attempting re-ignition.
• Heat-Up: The system will continue to operate until the call for heat is satisfied, followed by a heat-up period (40 seconds as per module label).

6. Diagnostic Indicators

The module is equipped with a diagnostic LED to assist in troubleshooting. Observe the LED flashes to identify the operational status or fault condition.

Refer to the appliance's service manual for specific troubleshooting steps related to these diagnostic codes.

7. Maintenance

The FENWAL 35-655312-021 Automatic Ignition System Control Module is designed for reliable, maintenance-free operation under normal conditions. Regular maintenance of the overall heating appliance, as recommended by the appliance manufacturer, is crucial for the longevity of all components, including the control module.

• Ensure the area around the control module is kept clean and free from dust, debris, and moisture.
• Periodically inspect wiring connections for tightness and signs of corrosion.
• Do not attempt to open or repair the module. If a fault is detected, the module should be replaced by a qualified technician.

8. Troubleshooting

If the heating appliance fails to operate correctly, perform the following basic troubleshooting steps. Always ensure power is disconnected before inspecting components.

• No Heat: Check the thermostat setting. Ensure the appliance has power. Verify the diagnostic LED on the control module for fault codes.
• Intermittent Operation: Check for loose wiring connections. Ensure proper grounding. Consult the diagnostic LED for intermittent fault indications.
• Ignition Failure: Check the ignitor for damage or wear. Verify gas supply. Check the diagnostic LED for ignition lockout codes.

For complex issues or if basic troubleshooting does not resolve the problem, contact a qualified HVAC service technician.

9. Specifications

10. Warranty and Support

According to available product information, there is no manufacturer's warranty provided for this item. Please refer to your point of purchase for any applicable return or exchange policies. For technical support or service, it is recommended to contact a qualified HVAC service technician.

For general inquiries, please refer to the manufacturer's official documentation or website if available.