Description
The Allanson 2721-457 is an OEM ferromagnetic ignition transformer engineered for reliable high-voltage spark generation in Acme Weatherall gas and oil burner applications. It runs on a 120 VAC primary and steps up to a 10,000 VAC secondary output with a ~250 VA rating, delivering consistent ignition energy for dependable burner start-up. Built with high-temperature internal windings and a midpoint-grounded core, this transformer operates quietly and cool, meeting EMI/RFI noise suppression standards. Designed to OEM specifications, the 2721-457 offers long service life and dependable ignition performance across residential, commercial, and industrial HVAC systems.
Key Features
- 120 VAC primary voltage — standard line input for HVAC ignition circuits
- 10,000 VAC secondary output with ~23 mA current for strong spark energy
- ~250 VA rated output suited for demanding burner ignition loads
- Midpoint-grounded ferromagnetic design for stable voltage and safer operation
- High-temperature internal windings withstand heat cycling for long life
- Constant-duty construction runs cooler and quieter than generic units
- Meets American and European EMI/RFI noise emission standards for clean electrical performance
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