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Re: Manual modulation of oversized old boiler?


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Posted by rbeck on December 12, 2008 at 17:22:48:

In Reply to: Re: Manual modulation of oversized old boiler? posted by Michael_C on December 09, 2008 at 19:10:17:

STOP!!!! never block off or eliminate burners in a cast iron boiler. The ratio of heat input to fireside heating surface gets all out of wack. The sections expand and contract at different rates. The boiler will fail. By code you can only reduce by up to 20%.
To reduce you mist resize the orifices.


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