Baro Damper Recommendations

Baro Damper Recommendations

PostBy: coal-cooker On: Fri Apr 04, 2008 8:23 pm

I have always had a manual damper on my coal stove, but see that Harman does not recommend them on theirs. I plan on installing a baro damper when I install my Harman Mark II this fall and am looking for recommendations on which one is better. Thanks in advance for your input.

Also, I am thinking of putting a tee pipe instead of an elbow where I turn to go out to the chimney and am wondering if anyone has experience in doing this. Is there any pitfalls to this design, since there is not a gracefull curve but rather a hard turn? I want to put a cleanout plug in the end, so I don't have to disassemble the pipe to clean it out mid season.
coal-cooker
 
Stove/Furnace Make: Crane/Harman
Stove/Furnace Model: Coal Cooker/Mark II

Re: Baro Damper Recommendations

PostBy: Wood'nCoal On: Fri Apr 04, 2008 9:08 pm

Well, you've come to the right place!
Use a Field Controls Model RC baro damper.
Install a "tee" on the back of the stove with a cap on the open end so you can clean the ash out of pipe and behind the baffle in the fire box. That's where lots of fly ash will accumulate on the Mark stoves. Use another tee at the turn into the thimble, place the baro there. You will have to set it with a manometer, because it's at a turn in the pipe the settings on the weight scale won't be accurate.
Just remember that the baro can be installed in a turn in the pipe as long as the gases flow away from it. Never install it where the gases flow towards it.
Start the stove and build it up to a full vigorous fire, then set the baro damper. I run mine at -.05" WC.
Apologies to those who have seen this photo a thousand times, but it shows how my Harman is piped with the cleanout and the baro damper.
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Furry brown things beyond the stove are the dogs.
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There should be no need for the manual damper on a Harman Mark with the baro damper. Field Controls also makes the RC in black, most suppliers don't have it in stock, they will have to order it for you.
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: Baro Damper Recommendations

PostBy: coal-cooker On: Fri Apr 04, 2008 9:29 pm

Thanks W&C. I can eliminate one tee as I have an old model that vents out the top of the stove. I plan to go straight up and then have a tee to turn and go out to chimney. I will plan on putting the damper in the end of this tee. The pictures I have seen from RC vendor says don't put damper there, but this looks like where a lot of people are doing it from what I have seen on here. When i picked up the stove, the previous owner had a baro right after an elbow at the top of the stove, due to lack of room.

This is the stove I just picked up (see identifying an old Harman string).
coal-cooker
 
Stove/Furnace Make: Crane/Harman
Stove/Furnace Model: Coal Cooker/Mark II


Re: Baro Damper Recommendations

PostBy: Wood'nCoal On: Fri Apr 04, 2008 10:07 pm

The RC instructions with my damper show this location as OK, another set of instructions I have seen has the same diagram but without that indication. All I know is that it works very well for me, the draft is consistent, the manometer reading doesn't move much.
I wasn't aware that Harman made these stoves in a top vent model. Learn something new every day.
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: Baro Damper Recommendations

PostBy: WNY On: Sat Apr 05, 2008 7:36 am

I bought mine here, They had them on Ebay, but these are the cheapest I could find..

http://www.patriot-supply.com/products/ ... m.cfm/1940
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon