Selection follows the same principles as oil furnaces: match primary voltage, mounting style, duty rating, and required secondary voltage and current. Confirm compatibility with the burner control and electrode configuration. Choose a model rated for the boiler environment, including temperature and vibration. Maintenance includes checking terminals, insulation, and spark performance. If the boiler has recurring ignition faults, verify electrode gap and grounding first, then test transformer output. Using the manufacturer recommended part reduces mismatch risk and improves long term reliability.
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