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Re: Boiler Over Firing?

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Posted by HeatPro on February 18, 2006 at 15:30:57:

In Reply to: Re: Boiler Over Firing? posted by rep on February 18, 2006 at 14:45:08:

: If this is indeed so grossly overfired isn’t a large portion of the heat simply flying past the heating surfaces up the flue?
+++ Depends upon how much extra heating surface is effective - it remains unknown until the designer can give the word.

: Gas pressure regulator is currently set 10 turns in which appears be 5.83” wc (see attached). Could I change this to the 6 turns recommended for 3.5” wc without effecting the combustion gas levels dangerously?
6" wc is an unusual setting. 4" was the older usual setting. 3/5" more often newer heaters. You can track the results on the gas meter again.

That should be all you need unless the orifice became worn and is causing improper burner injection.

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Comments:
: : If this is indeed so grossly overfired isn’t a large portion of the heat simply flying past the heating surfaces up the flue? : +++ Depends upon how much extra heating surface is effective - it remains unknown until the designer can give the word. : : Gas pressure regulator is currently set 10 turns in which appears be 5.83” wc (see attached). Could I change this to the 6 turns recommended for 3.5” wc without effecting the combustion gas levels dangerously? : 6" wc is an unusual setting. 4" was the older usual setting. 3/5" more often newer heaters. You can track the results on the gas meter again. : That should be all you need unless the orifice became worn and is causing improper burner injection.

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