Allanson Transformers 2721-605 Transformer

The Allanson 2721-605 ignition transformer is a field-proven solution for reliable spark ignition in residential and commercial oil heating applications. Purpose-built as a direct replacement for the Beckett 28217, this unit is engineered specifically for the Beckett S Burner chassis. Operating on a 120Vac supply voltage, it delivers a precise 10,000Vac secondary voltage at 23mA to ensure consistent arc stability even in cold-start scenarios. This mid-point ground transformer features heavy-duty internal construction to handle the thermal demands of high-cycle oil burners. For technicians troubleshooting weak spark or intermittent ignition issues, the 2721-605 provides the exact footprint and electrical characteristics required for a seamless swap. Its robust design minimizes RF interference, protecting sensitive furnace controls and burner primary controls from electrical noise during the ignition sequence.

• Direct Compatibility: Exact electrical and mounting match for Beckett S Burner units and Beckett 28217 transformers.
• High-Output Ignition: 10kV secondary voltage provides a strong, reliable spark for efficient fuel atomization.
• Mid-Point Grounding: Optimized for standard oil burner safety circuits and traditional ignition leads.
• Industrial Build: Engineered by Allanson Transformers to withstand the high-temperature environment of the burner housing.

Common Questions

Will the 2721-605 fit my specific Beckett burner?
This unit is designed for the Beckett S Series. If your existing transformer is a Beckett 28217, this is the drop-in replacement. Always verify the mounting plate configuration before installation.

What are the primary electrical specifications for this ignition transformer?
The unit requires a 120V / 60Hz input and produces a 10kV output at 23mA. It utilizes a mid-point ground configuration, which is standard for these oil heating systems.

Can this transformer resolve lockout issues?
If your burner is locking out due to "no spark" or "weak spark" during the trial for ignition, replacing a failing constant duty transformer with this Allanson unit often restores reliable operation.

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.

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