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Posted by heatpro.us on February 22, 2013 at 19:11:08:
In Reply to: Re: age of boiler posted by GREG on February 21, 2013 at 21:38:17:
: I HAVE A NATIONAL CONVERTED FROM COAL TO GAS 1,000,000 BTU BOILER FOR APARTMENT BUILDING. JUST REBUILT THE BURNER BUT NOW THE SPARK ROD TUBE GETS SOOTED UP AFTER A FEW STARTS AND IDEAS?
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No gas burner should create soot. That's an indication of insufficient air. The exhaust might be blocked, something making the flame hit the side of the chamber, the chimney clogged, or the air mixture is insufficient.