Allanson 421-655-G Transformer

The Allanson 421-655-G Transformer is a high-performance ignition transformer engineered specifically for Power Flame burners and high-demand commercial heating systems. This heavy-duty unit operates on a 120Vac supply voltage, delivering a consistent 10,000Vac secondary voltage at 23mA to ensure reliable arc stabilization and efficient fuel ignition. Designed with a midpoint ground configuration, the 421-655-G minimizes electromagnetic interference and enhances circuit safety during high-voltage discharge. As an essential HVAC burner part, this transformer is built to withstand the thermal stress of continuous industrial operation. Professional installers favor this Allanson ignition coil for its precise mounting footprint and robust internal windings, which prevent premature failure due to carbon tracking or dielectric breakdown. For technicians performing Power Flame burner maintenance, this component provides the high-energy spark required to maintain optimal combustion cycles and system uptime in critical boiler applications.

• Universal Power Flame Compatibility: Explicitly designed as a direct replacement component for Power Flame series burners.
• High-Voltage Stability: Consistent 10,000V output ensures a powerful arc for reliable ignition in cold-start conditions.
• Midpoint Ground Design: Reduces electrical stress on insulation, extending the operational life of the primary and secondary windings.
• Durable Construction: Engineered to resist vibration and moisture ingress common in mechanical room environments.

Common Questions

Is the Allanson 421-655-G compatible with other burner brands?
While primarily specified for Power Flame burners, it can be used in applications requiring a 120V primary and 10kV secondary with a midpoint ground. Always verify the mounting bracket and terminal configuration before installation.

What are the symptoms of a failing ignition transformer?
Common indicators include weak or intermittent sparking, "no-fire" lockouts on the primary controller, or visible cracks in the ceramic insulators. Bench testing with a transformer tester can confirm if the 23mA output is within spec.

Does this unit include the mounting base?
The Allanson 421-655-G is typically supplied with the standard mounting plate integrated for rapid field replacement on compatible burner housings.

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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.