Keystoker A-150 ideal shutter opening

Keystoker A-150 ideal shutter opening

PostBy: szembek On: Sat Nov 30, 2013 9:41 am

Trying to decide how far open to open my shutter for the combustion fan... Had it about 1/4 open, but now that it's getting cold I wonder if opening it slightly more will help throw more heat or not, it certainly makes the flame bigger.... The problem would be I fear too much heat going up the chimney if I open it up too far. I have the feed adjusted so there's about 2" of ash at the end of the grate. Just wondering if there are any rules of thumb any of you have for this. Thanks.
szembek
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A120

Re: Keystoker A-150 ideal shutter opening

PostBy: blrman07 On: Sat Nov 30, 2013 9:52 am

Bigger flame = more heat. Try it and see. Nothing ventured, nothing gained.

Rev. Larry
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: Vigilant Casting 2310
Baseburners & Antiques: rebuilding a 1906 March Brownback Double Heater, using a UMCO 1920's Pot Belly stove in the church
Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.

Re: Keystoker A-150 ideal shutter opening

PostBy: titleist1 On: Sat Nov 30, 2013 9:56 am

while excess heat going up the chimney isn't optimal, i always felt the bigger fear is more combustion air than the chimney can exhaust and it finds its way out of the hopper or other openings in the fire box sending co into the room.

having a manometer set up and taking readings from the firebox as well as the flue pipe can help you dial in the best and safest setting.
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

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Re: Keystoker A-150 ideal shutter opening

PostBy: Rob R. On: Sat Nov 30, 2013 10:18 am

blrman07 wrote:Bigger flame = more heat. Try it and see. Nothing ventured, nothing gained.

Rev. Larry


I think you mean bigger fire, not just flames. If the ash starts right before the last set of air holes that is as good as it gets...additional air will just increase the stack temperature.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Keystoker A-150 ideal shutter opening

PostBy: Pacowy On: Sat Nov 30, 2013 11:34 am

If you're trying to get more heat you should be adding both air and feed. Adding only air will just add dead ash at the end of the grate.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Keystoker A-150 ideal shutter opening

PostBy: WNYRob On: Mon Dec 02, 2013 9:38 am

Opening your combustion shutter will generate more heat from any given amount of coal. As stated above, just watch you don't add TOO MUCH air so that your draft goes to -0- and flue gases start leaking out your doors.

Don't worry about losing heat up your chimney, while you flue temps will increase slightly, your barometric damper should keep your draft in check and your flue temps in check by default.

As long as you have your max burn set according to Keystoker's recommendation, you shouldn't have to worry about the amount of ash on the burn grate. You will never burn at your maximum rate 100 % of the time so there will always be varying lengths of ash on your grate, no matter how much air you are blowing through the coal bed.
WNYRob
 
Hot Air Coal Stoker Stove: Keystoker Koker controlled with CoalTrol

Visit Lehigh Anthracite