Coalpail.com Forum

Kalindi wrote:Hi,

This is Doug of Kalindi and Doug. After researching this site and examining my Acorn 215, I have created a diagram of the air flow for a base burner stove in both start-up and base burning modes. Please let me know if there are any correction that I need to make.

Doug

Doug, Nice drawing! I don't know how the Acorn works, might be exactly as you have drawn it. Compared with my Glenwood, what you have drawn for your valve and the two smoke pathways are a bit different. I'll call those two paths the direct vent path and the re-circulation path. Lets see if I can explain. Your drawing shows the two paths almost as two separate parts; the baffle on the bottom is being shown as horizontal; in your drawing, the valve when set to direct vent path has no effect on the re-circulation path. In the Glenwood, the two paths are housed in the same part, the part that goes down the back of the stove. The baffle in the bottom is actually vertical and the valve when set to direct vent actually closes off the re-circulation path. Don't know if this makes any sense...

dj

DJ,

I have attached another drawing that may explain better. You are correct the baffle in my diagram was only drawn that way to make the drawing possible, it is difficult trying to show this 3D stove in 2D. I have attached a better drawing of the base chamber.

The valve or flapper on my stove is the same flapper for both paths, if it is up the re-circ path is open and the direct path is closed, if it is down the re-circ path is closed and direct path is open. The flapper rotates around the dot on the drawing. The valve is set up to close the end of the re-circ path not the beginning.

Doug

Are paths "d" & "e" stacked vertically as in the first drawing, or side by side as in

the lower drawing? Is there a clean out door on each of the passageways?

How does this design make the primary air go thru the suspended coal

pot and not around the sides?

Thank You: BigBarney

The heat exhanger is in the bottom of the stove, UNDER, the ash pit area. The tube goes in a horizontal semi circle under the ash pit. Please see photo of the Glenwood below. You can clearly see how the heat exhanger is made. On the Glenwood cleaning is easy since there is a big rectangular plate that comes off of the top of the base heating chamber. All you do is stick a vacuum hose in there and clean it out.

Kalindi wrote:DJ,

I have attached another drawing that may explain better. You are correct the baffle in my diagram was only drawn that way to make the drawing possible, it is difficult trying to show this 3D stove in 2D. I have attached a better drawing of the base chamber.

The valve or flapper on my stove is the same flapper for both paths, if it is up the re-circ path is open and the direct path is closed, if it is down the re-circ path is closed and direct path is open. The flapper rotates around the dot on the drawing. The valve is set up to close the end of the re-circ path not the beginning.

Doug

Doug, So your stove is indeed different from the Glenwood. On the Glenwood, the flapper closes the entrance to the re-circ path in direct vent and then closes the passage to the direct vent, opening the re-circ path in base burner operation...

Pretty interesting...

dj

Here is my latest revision of the air flow paths for the Acorn 215 Base Burner. I have corrected a damper location and shown the Combustion Air Bypass Damper and how it works. Some people have asked what the slide thing is on the back of their stove, on my stove it is the Combution Air Bypass Damper. Also, any terminology I use may or may not be correct but I try to be descriptive in my naming.

Thanks very much for the diagram. I'm sure it will help a lot of people grasp the concept of what a base burner does and how it works.

Excellent drawing Doug.

Kalindi wrote:Here is my latest revision of the air flow paths for the Acorn 215 Base Burner. I have corrected a damper location and shown the Combustion Air Bypass Damper and how it works. Some people have asked what the slide thing is on the back of their stove, on my stove it is the Combution Air Bypass Damper. Also, any terminology I use may or may not be correct but I try to be descriptive in my naming.

Nice drawing - someone should throw one of these together for the Glenwood as the Acorn and the Glenwood are rather different...

dj

Kalindi:

This is the best description and drawing of a base burner I have seen.

The combustion air damper is like the barometric damper that is used
in our burners today,but ours are automatic,instead of having to be manually
adjusted for an even better control of the draft.

bigbarney

so in order to determine if my oak hub is a base burner I would need to pull out the ash pan and look in the space to see if there is a separator? what if I post pictures of the back of it, can somebody tell then? thanks, you guys/gals are so wonderful. God bless ya all!

here is the lower and upper portions of the back of my Hub oak, if anyone has info on the model 816 hub oak by smith & anthony, I would appreciate hearing about it. thanks.

Your S&A Oak Hub Heater is just what is says it is. An oak heater with a cast indirect back pipe and quite attractive one I might add. It is the same as my Glenwood Modern Oak 116. Don't what size firepot it has or what size area you want to heat but they are a well made quality heater stove. I believe one of our new members (pma) has a hub heater in his collection.

Hi NM,does your Hub heater have a single layer of metal under the ashpan? or is there a 2" deep hidden hot air passageway under the ashpan?
From the photos your Hub Heater has a single layer of steel under the pan.
Your stove has a double passageway indirect pipe on the back of the stove. The indirect pipe can be confusing because it rests on an extension of the base, and looks like it could duct exhaust gasses into the base, but there is nowhere for the exhaust to go under the ashpan..

Very nice stove,

Greg L

nikonmom wrote:

hub stove 014.JPG

here is the lower and upper portions of the back of my Hub oak, if anyone has info on the model 816 hub oak by smith & anthony, I would appreciate hearing about it. thanks.

I would like to see some photos of the bottom area of the stove all around. I have a reason for asking.