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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
and T2 valve bodies
This transformer is a direct-fit replacement
Works on all types of round copper
acting as a critical safety override
Always verify the voltage output of your furnace control board before installation
Allanson 421-557 Transformer Els PW 17895 and T2 valve bodiesThe Allanson 421 557 is a heavy duty oil burner ignition transformer engineered specifically for Arco and American Standard burners. This iron core transformer utilizes a 120V primary supply to deliver a consistent 10,000V secondary output at 23mA, ensuring a powerful arc for reliable burner ignition in demanding environments. Designed with a mid point ground configuration, the 421 557 features a high silicon steel core and large gauge copper windings
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