Manometer All Over the Place

This forum is for common products and questions such as chimney installations, CO detectors, coal bin designs and a variety of other general topics that do not fit into the other forums.
ihatewood
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Joined: Thu. Jan. 20, 2011 9:28 pm
Stove/Furnace Make: Harmon Magnum stoker
Location: Factoryville PA.

Post Mon. Oct. 29, 2012 8:06 pm

Yes its set at 6 and not moving is this normal.

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freetown fred
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Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut
Location: Freetown,NY 13803

Post Mon. Oct. 29, 2012 8:11 pm

What are you trying to say? ;)
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower

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Lightning
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Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Anthracite/Awesome Size
Location: Olean, NY

Post Mon. Oct. 29, 2012 8:13 pm

I don't know what is optimum for your stove, but most have their baro set so that it starts to open as it climbs above a 0.02 on the mano. Hopefully someone will chime in with more information.


ihatewood
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Joined: Thu. Jan. 20, 2011 9:28 pm
Stove/Furnace Make: Harmon Magnum stoker
Location: Factoryville PA.

Post Mon. Oct. 29, 2012 8:18 pm

Harmon suggests setting baro to maintain -04to -06 inches of water column

ihatewood
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Joined: Thu. Jan. 20, 2011 9:28 pm
Stove/Furnace Make: Harmon Magnum stoker
Location: Factoryville PA.

Post Mon. Oct. 29, 2012 8:21 pm

I guess this reading would be fine then.

WNYRob
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Location: Springville, NY

Post Mon. Oct. 29, 2012 10:57 pm

Right now, we have about 40 mph gusts and my chimney (17' steel) always has a good draft regardless of wind speed. My damper is just swinging away while quite often being pegged wide open for a few seconds at a time. Kokers like a draft of about .025 and the damper is keeping mine between about .02 and .035. While my firebox was burning about 300 degrees, my flue temp was about 110, most of the air in my chimney was being drawn through the damper and not through the stove's firebox. To me, this is an example of a properly functioning damper.


vulcan
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Hot Air Coal Stoker Stove: keystoker koker 160
Hand Fed Coal Stove: Chubby rear vent
Location: NEPA wilkes Barre - scranton area

Post Mon. Oct. 29, 2012 11:46 pm

I was interested to see how my direct vent koker would handle this wind and so far its been very steady on the magnehelic at right about .02 with almost no variance. This is my first year for coal so I wasn't sure what to expect.

rberq
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Hand Fed Coal Stove: DS Machine 1300 with hopper
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Other Heating: Oil hot water radiators (fuel oil); propane
Location: Central Maine

Post Tue. Oct. 30, 2012 7:14 am

ihatewood wrote:Yes its set at 6 and not moving is this normal.
Don't worry about the brief fluctuations in gusty winds. The baro is a mechanical device and does not respond instantaneously.

Also, the baro calibration marks are just a rough reference, not a precise setting. Adjust the baro to give the desired manometer reading, since the manometer IS more of a precision device. If your target is .05, and the manometer says .05, then you are good regardless of which mark the baro weight is at.

If there is a BIG discrepancy between the baro setting and the manometer reading, then you might have other issues such as a deficient or too-efficient chimney, improperly placed baro, improperly place manometer, etc. etc. If so it's probably best to address that in a new thread.
Simple answers for simple minds.

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lsayre
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Stoker Coal Boiler: AHS S130 Coal Gun
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Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Tue. Oct. 30, 2012 7:35 am

ihatewood wrote:Yes its set at 6 and not moving is this normal.
With that setting it would be normal for the baro damper to be steadily closed if your manometer is steadily reading something less than 0.06". Now if it is set at 6 and it's not moving because it's stuck wide open, and your manometer is reading less than 0.06" that would be a major concern.
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

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