Air shutter question

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Old 02-01-09, 07:52 AM
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Air shutter question

My new Peerless M1-o4 gas water boiler does not have the adjustable air shutters like my old burner.

are newer boilers no longer adjustable?

Thanks
 
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Old 02-01-09, 11:57 AM
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If your boiler has an induced draft fan (exhaust gas blower) then you likely do not have any primary air shutters on the individual burners.

Quite simply, the entire boiler is designed for a specific airflow through the burners, combustion chamber(s) and draft fan. This is also why changing the firing rate is rarely able to be done in the field.
 
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Old 02-01-09, 01:12 PM
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Thanks furd. Boiler is as you described
 
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Old 02-01-09, 03:38 PM
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I don't see an induced draft fan in that boiler... I think it's atmospheric... the install manual didn't say anything about combustion adjustments, other than to check and adjust the gas pressure.
 
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Old 02-01-09, 04:27 PM
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The flue vent pipe has a damper in it. It is electrically operated when the burners come on.

I also, didn't see any mention of adjustments,other than calling a qualified person for service.

The boiler is pretty straight forward,and in looking it over i noticed that it didn't have any air shutters like my old 40 yr. boiler,and thats what made me wonder.
 
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Old 02-01-09, 05:32 PM
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Originally Posted by daswede View Post
The flue vent pipe has a damper in it. It is electrically operated when the burners come on.
Right, but that damper is not the same thing as an induced draft fan. What furd was talking about was an actual blower that moves air through the combustion area.
 
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Old 02-01-09, 06:01 PM
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And thanks to you NJ Trooper
 
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Old 02-02-09, 08:44 AM
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Should not need air shutters on atmospheric burners. The velocity of the gas coming through an office out of a manifold with the proper manifold pressure, sets up a venturi to pull in the proper amount of primary air. If the air fuel mix is off it is due to improper manifold pressure.
By the way the secondary air is controlled by the draft hood, that is why we should never alter a draft hood.
 
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