Allanson 421-661 Transformer

The Allanson 421-661 Ignition Transformer is a high-performance Gordon Piatt replacement transformer designed for reliable spark ignition in demanding commercial burner applications. Engineered with a 120Vac supply voltage and a 10,000Vac secondary voltage output at 23mA, this unit ensures consistent arc stabilization even in fluctuating environments. This specific mid-point ground transformer is built to meet the exact electrical requirements of Gordon Piatt burner parts, providing a direct-fit solution that reduces downtime during field service. The heavy-duty internal windings are vacuum-impregnated to withstand thermal cycling and high-voltage stress, minimizing the risk of insulation breakdown. For technicians performing oil burner transformer troubleshooting, the 421-661 delivers the precise milliamperage required to maintain the pilot flame across diverse combustion chambers. Integrating this 10kV rated component ensures the ignition system operates within original OEM specifications for residential and light industrial heating equipment.

• Gordon Piatt Compatibility: Tailored specifically for Gordon Piatt ignition systems to ensure seamless mechanical and electrical integration.
• Stable 10kV Output: Delivers a consistent high-voltage arc at 23mA for reliable fuel vaporization and clinical ignition cycles.
• Mid-Point Grounding: Engineered for safety and compliance with vintage and modern control circuit configurations.
• Industrial-Grade Housing: Constructed to resist vibration and moisture-induced shorts frequently found in boiler rooms.

Is the Allanson 421-661 a direct drop-in for Gordon Piatt burners?
Yes, this transformer is designed to match the mounting footprint and terminal spacing of original Gordon Piatt ignition components, specifically those optimized for 120V primary circuits.

How do I verify if my 10,000V transformer is failing?
Technicians should check for a consistent spark across the electrodes. If the secondary voltage drops below the 23mA threshold or shows signs of carbon tracking on the porcelain insulators, the transformer likely requires replacement.

Can I use this 421-661 model in place of a standard electronic ignitor?
This is an iron-core transformer. While more durable in high-heat environments than many electronic ignitors, you must ensure the amperage and mid-point ground configuration align with your specific control board requirements.

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.