Barometric damper question

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PA-Ric
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Post by PA-Ric » Wed. Jan. 17, 2018 11:17 pm

How much should a barometric damper be opening on a 10 degree day with little wind .

 
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lsayre
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Post by lsayre » Thu. Jan. 18, 2018 4:07 am

It depends upon your manometer reading of the chimneys draft, and where you have your barometric damper set to break open (with respect to the manometer reading).

 
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WNY
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Post by WNY » Thu. Jan. 18, 2018 5:37 am

It's all relative to your setup, heat output, draft setting, etc... it's not always the same on everyone's stove. You just need to have it set for proper draft on your draft gauge for your situation. Draft usually goes up a bit when it's colder and burning hotter. mine will stay open quite far in these colder temperatures. and still read .04-.05 depending.


 
PA-Ric
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Post by PA-Ric » Thu. Jan. 18, 2018 12:33 pm

Thanks for the response ,

I just recently installed a Dwyer Mark ll Manometer . After calibrating It my reading was at .07 on the gage . I adjusted the Barometric damper to where the reading stays around .04 on the gage . I am surprised at how open the damper stays to maintain that . I can see a difference in the heat output after just a few days . Is there any time that I should adjust the air intake of the combustion blower motor to reduce or increase the draft to maintain a proper reading instead of adjusting the Barometric Damper .

 
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StokerDon
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Post by StokerDon » Thu. Jan. 18, 2018 6:16 pm

The damper is what you adjust to keep the heat in the stove, not the other way around. If the damper spends a lot of time hanging open it just means your chimney drafts well. Sounds like you are new to measuring draft and setting the damper and you've learned that setting the draft properly means the stove puts out more heat.

Good job!

-Don

 
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nepacoal
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Post by nepacoal » Thu. Jan. 18, 2018 6:37 pm

Per the koker manual, to adjust your draft:

During a long call for heat of 30+ minutes, remove the set screw in the ash door and insert a manometer probe. The draft should not go below -.02 or above -.03. If the draft is above -.03, adjust the baro to open sooner to lower draft. If the draft is below -.02, close the shutter on the combustion fan.

I shoot for -.0225 on my kaa-4 and adjust it on a calm day when it's a about 20 deg.

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