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The Honeywell ST7800A1021/U is a purge timer designed for use with the 7800 series products. This timer operates for ten seconds, suitable for various burner combustion applications.
This purge timer is vital for maintaining proper burner function and safety.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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