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CLEANING BOILER HEATING SURFACES:
The following service procedures must be performed ONLY by a qualified service agency. Boiler owner should
not attempt these procedures.
1. If you find soot in top of vent elbow (some sediment in bottom of vent is normal) - remove vent attachment to the ADB
and clean flue exhaust baffle inside the boiler. Also check burner, replace if damaged.
2. If you find rust deposits in vent elbow - check for high water flowrate or low inlet water temperatures. Clean boiler as
above.
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