Allanson Ignition Transformer User Manual

Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of the Allanson Ignition Transformer, Model 2721-628G. This transformer is specifically designed for use with Becket A, AF, and AFG series oil burners. Please read this manual thoroughly before attempting any installation or service.

Safety Information

WARNING: Electrical shock hazard. Installation and servicing of this product must be performed by a qualified technician. Disconnect all power to the burner and heating system before installing, servicing, or removing the ignition transformer.

• Always ensure power is disconnected at the main circuit breaker before beginning any work.
• Verify voltage and current ratings match the burner's requirements.
• Do not operate the transformer if it is damaged or has exposed wiring.
• Ensure proper grounding to prevent electrical hazards.
• Follow all local electrical codes and regulations.

Product Overview

The Allanson Ignition Transformer (Model 2721-628G) is a critical component in oil burner systems, responsible for generating the high voltage required to ignite the fuel. It converts standard line voltage to a high-voltage spark, ensuring reliable ignition.

This image shows the Allanson Ignition Transformer, Model 2721-628G, from a front-top perspective. The primary label is visible, indicating "PRIMARY 120 V 60 HZ 250 VA" and "SECONDARY 10,000 V 23 MA". Two high-voltage terminals with springs are visible at the top, along with input wires extending from the sides. The unit is black with a green circular sticker on the side.

This image displays a side view of the Allanson Ignition Transformer. One of the high-voltage terminals with its spring is clearly visible, along with the input wiring. The mounting bracket is also visible on the side, and the green circular sticker is prominent on the main body of the transformer.

Setup and Installation

Installation of the ignition transformer should only be performed by a qualified HVAC technician or electrician. Incorrect installation can lead to equipment damage, fire, or serious injury.

1. Power Disconnection: Before starting, ensure all electrical power to the oil burner and heating system is completely disconnected at the main service panel. Verify with a voltage tester.
2. Access Old Transformer: Locate the existing ignition transformer on your Becket A, AF, or AFG burner. Note its mounting position and wiring connections.
3. Disconnect Wiring: Carefully disconnect the primary (low voltage) and secondary (high voltage) wiring from the old transformer. Label wires if necessary to ensure correct reconnection.
4. Remove Old Transformer: Unmount the old transformer from its bracket or housing.
5. Mount New Transformer: Mount the new Allanson 2721-628G transformer in the same location and orientation as the old one. Ensure it is securely fastened.
6. Connect Wiring:
   • Connect the primary (120V) input wires to the designated terminals on the new transformer. Refer to the burner's wiring diagram for specific connections.
   • Connect the secondary (high voltage) output wires to the electrodes of the oil burner. Ensure a secure and proper connection to the spark gap.
7. Verify Connections: Double-check all wiring connections for tightness and correctness according to the burner's specifications. Ensure no wires are pinched or exposed.
8. Restore Power and Test: Once all connections are secure and verified, restore power to the burner. Initiate a call for heat and observe the ignition sequence. The transformer should produce a strong, consistent spark.

Operating Principle

The Allanson Ignition Transformer operates by stepping up the incoming 120V AC line voltage to a high voltage (10,000V) at a low current (23mA). This high voltage is then applied across the burner electrodes, creating an electrical arc (spark) that ignites the atomized fuel oil. The transformer is designed for intermittent duty, meaning it only operates during the ignition cycle of the burner, typically for a few seconds until stable combustion is established.

Maintenance

Regular maintenance helps ensure the longevity and reliable operation of your ignition transformer. All maintenance should be performed by a qualified technician with power disconnected.

• Annual Inspection: During routine burner servicing, inspect the transformer for any signs of physical damage, corrosion, or overheating (discoloration).
• Wiring Check: Verify that all primary and secondary wiring connections are secure and free from fraying or insulation damage.
• Cleanliness: Keep the transformer and its surroundings free from dust, dirt, and oil residue, which can impede heat dissipation and lead to premature failure.
• Electrode Condition: While not directly part of the transformer, ensure the burner electrodes are clean, properly gapped, and free from cracks or carbon buildup, as their condition directly impacts the transformer's performance.

Troubleshooting

If your oil burner is experiencing ignition issues, the ignition transformer may be a contributing factor. Always ensure power is disconnected before inspecting components.

If troubleshooting steps do not resolve the issue, it is recommended to contact a qualified HVAC technician for further diagnosis and repair.

Specifications

Warranty Information

Specific warranty terms for the Allanson Ignition Transformer (Model 2721-628G) are provided by the manufacturer, Allanson. Please refer to the warranty documentation included with your purchase or visit the official Allanson website for detailed information regarding warranty coverage, duration, and claims procedures. Keep your proof of purchase for warranty purposes.

Customer Support

For technical assistance, installation questions, or troubleshooting beyond the scope of this manual, please contact a qualified HVAC professional or refer to the official Allanson support channels. Contact information for Allanson can typically be found on their official website or on the product packaging.