The Axeman has landed

Re: The Axeman has landed

PostBy: beatle78 On: Wed Jul 30, 2008 9:47 am

Hey Dave,

How's the AA-130 treating ya?

Are you still running the domestic off of the AA-130?

How much coal do you think you're using per day?

~Jeremy
beatle78
 
Stove/Furnace Make: Keystoker KA-4

Re: The Axeman has landed

PostBy: Flyer5 On: Thu Jul 31, 2008 1:12 pm

Nah she is quite at the moment . I have to redo the stovepipe because of ash getting past the baro when the fan is running . I guess I should have studied that part in the manual better . THey show a pipe inside of a pipe halfway past the baro . How is the KA4 going .
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: The Axeman has landed

PostBy: beatle78 On: Thu Jul 31, 2008 3:25 pm

ok, ya lost me there? I thought all stoker's emitted a fly ash up the chimney? Is than an issue with that?

The KA-4 is still sitting on the dolly in my basement. Now it looks like we might be going an addition this fall and the install will be in the way of that.

Right now, I'm working on how I'm going to reconfigure our home heating solution. I may be converting to radiant heat.

I have another thread going about primary/secondary loops for my new system. http://nepacrossroads.com/post50497.html#p50497

I'm a bit in over my head, but I have a neighbor that is in the plumbing and heating business so I may have to talk to him to figure some things out.
beatle78
 
Stove/Furnace Make: Keystoker KA-4

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Re: The Axeman has landed

PostBy: Freddy On: Thu Jul 31, 2008 4:41 pm

The AA's exhaust is under pressure while stoking. The damper should be as close to the chimney as possible. They show a diagram similar to this. The stove pipe goes half way through the damper so exhaust doesn't escape into the house.
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Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: The Axeman has landed

PostBy: beatle78 On: Thu Jul 31, 2008 6:31 pm

hmmmm.... ok soooo it's under pressure, and the baro will still do it's job b/c the chimney pipe is 1/2 way through the baro(not completely blocking it) to ensure the exhaust gas goes up the chimney and not into the house?
beatle78
 
Stove/Furnace Make: Keystoker KA-4

Re: The Axeman has landed

PostBy: Yanche On: Thu Jul 31, 2008 7:49 pm

You need to understand what's happening with a A-A or AHS boiler. When it's combustion blower is running the flue ash that does not precipitate out in the cyclone separator is swept along with the combustion gases. You want to keep the flue gas velocity up to carry the ash along. Ideally all the way to the chimney. There the flue gas velocity will abruptly change and the ash will fall out to the chimney clean out. But you need a barometric damper to control wind induced overdrafts. It has is undesirable side effect of reducing the flue gas pressure, causing the ash to precipitate in the pipe.

So what to do? First have as tall a stove pipe as possible on the exhaust breach on the boiler. This forces the ash to have to climb vertically against gravity. When the combustion blower stops what ash is in this portion of the pipe will fall down to the cyclone. Second locate the barometric damper close to the chimney thimble. At least most of the ash will make it to the chimney and fall down to the clean out. When you cut into the stovepipe to install the barometric damper keep from cutting the stovepipe below the horizontal centerline. This will keep the ash in the stove pipe. Be sure the area you do cut out is equal to the area of the partially open damper. You don't want to restrict air flow through the damper. The area I'm talking about would be the equivalent cross section area of the pie shaped wedge when the damper is open in high draft conditions.

Perhaps the ideal solution would be to have the barometric damper installed in the chimney below the thimble. That way there would be a full velocity path all the way to the chimney. For that to work and meet code there needs to be an air path from the chimney installed damper to the room where the boiler is located. The cyclone separator is not an ideal design, it's way to small, and clogs frequently. See the comments about it in the Bureau of Mines Report on the Anthratube. Plan on having a way to poke at the separator cone frequently, either through the stovepipe from above or from the ash pit below. I use a long CB antenna through an access hole in the stovepipe. It's marginally effective because you are poking blind.

Note this information only applies to the A-A and AHS boilers. However the ash conveying velocity principles apply to all boilers.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: The Axeman has landed

PostBy: Freddy On: Thu Jul 31, 2008 9:52 pm

My chimney is in the same room as the boiler. What if the damper was in, or replaced, the clean out door? As long as it was maintained to make sure it never plugged? Maybe not...just cut two holes, one for stove pipe, one for damper? I like that idea.
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: The Axeman has landed

PostBy: Yanche On: Fri Aug 01, 2008 10:24 am

Easy enough to try, just temporarily replace the clean out door with a plate to mount the barometric damper. Check often and if it all works as planed cut in another thimble for the damper above the clean out door but below the flue pipe thimble. Watching the manometer should tell you when it's getting clogged.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: The Axeman has landed

PostBy: coaledsweat On: Fri Aug 01, 2008 1:05 pm

Pretty sure that is a no-no. The baro can go in the chimney but it would have to be above the thimble, below it it would not read the draft nor adjust it.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: The Axeman has landed

PostBy: U235a4 On: Fri Aug 01, 2008 1:29 pm

Go to the bottom of this link it has all the information you need for draft control.

http://www.fieldcontrols.com/draftcontrol.php
U235a4
 
Stove/Furnace Make: 1958 Axeman-Anderson
Stove/Furnace Model: 260M

Re: The Axeman has landed

PostBy: Yanche On: Fri Aug 01, 2008 4:58 pm

coaledsweat wrote:Pretty sure that is a no-no. The baro can go in the chimney but it would have to be above the thimble, below it it would not read the draft nor adjust it.
Now that I think about it you are right. The high velocity draft is needed to pull on the damper. Putting it below the stovepipe thimble would reduce the full velocity draft by the amount that goes through the stovepipe.

I do know I need a barometric damper with my AHS 130. Tried it without one and on windy days I could get close to run away conditions. The draft was strong enough to suck the boiler's front flapper door in.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: The Axeman has landed

PostBy: Freddy On: Fri Aug 01, 2008 8:45 pm

I love this forum!
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Visit Lehigh Anthracite

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