Yellow Flame, A Christmas Stoker Boiler

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: Wood'nCoal On: Tue Jan 21, 2014 11:06 pm

That's strange. Must have been "field modified".
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: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Tue Jan 21, 2014 11:11 pm

I am very glad it was. Works perfectly!

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: blrman07 On: Wed Jan 22, 2014 9:51 am

Excellent work. The only real problem I had with my Yellow Flame was with the timer and the aquastat. Changed em both out for more modern stuff after they hassled me a couple of times.

That timer may look a little funky but if it works for you, keep it.

Maybe I've discovered why Momma keeps me around?!!??!!

Rev. Larry
New Beginning Church
Ashland Pa.
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: installing a VC 2310
Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.

Visit Lehigh Anthracite

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Wed Jan 22, 2014 8:44 pm

I was right, the blowers were not up to the task. Today in between plowing and sonwblowing I remove the box fan from behind the 80K heat exchanger and installed this blower I had lay'in around in the basement. It came out of a mobile home oil firnace, 550CFM. Now the garage heats up to the thermostat temp!

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And, I think I'm gona hafta install a fire door with a window. I never get tired of look'in at those flames!

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-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: titleist1 On: Wed Jan 22, 2014 8:53 pm

StokerDon wrote:And, I think I'm gona hafta install a fire door with a window. I never get tired of look'in at those flames!


Here ya go...Lightning did that himself just a couple months ago..... 8-)

Load Door Window Installation
Last edited by titleist1 on Wed Jan 22, 2014 9:08 pm, edited 1 time in total.
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

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: tsb On: Wed Jan 22, 2014 9:02 pm

I built mine with a small view window, but the stoker blows
around so much fly ash, it fogs over very quickly. I replaced it
with a small open hole I can peak through. Make sure you
wear sun glasses when staring at the fire. It will snow blind you
in no time.
tsb
 
Stoker Coal Boiler: Binford 2000
Hot Air Coal Stoker Stove: LL Pioneer top vent
Hand Fed Coal Stove: Saey Hanover II

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Wed Jan 22, 2014 9:48 pm

I saw Lightning's door glass install, great idea. I has thinking of doing that with my Harman SF3500. With the Yellow Flame, the door is so small, and doesn't seal or latch, I was thinking removing the door and frame and making something that goes around the outside of the square that the current frame fits into.

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That way I would get maximum veiwing and the glass would be further way from the fire.

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: KLook On: Wed Jan 22, 2014 9:51 pm

Considering the job you have done rebuilding this unit, I am sure you are up to the task! 8-)

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: Rob R. On: Thu Jan 23, 2014 6:21 am

Hey Don, I am not sure how long the stoker had been running when you took those pictures of the fire, but there is a LOT of ash on the grate. Once the fire reaches a steady-state, you want to see more fire and less ash at the end of the grate. Think about it, if you are blowing air through ash what is it doing? -taking heat out of the boiler.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Thu Jan 23, 2014 9:46 am

Rob,

Understood, I haven't really been able to check it at full burn. With a stove or a furnace, you just crank up the thermostat, wait a half an hour or so, then look at the flame to see how much ash is at the end. With the boiler if you crank up the thermostat, the stoker just shuts off when the water temp hits 180. On this setup, even with the blowers on constantly the cycle only takes 5 to 10 minutes. I guess that means even though the two heatexchangers equal 130KBUT, the boiler is't working hard to supply heat to them. Do I need more of a load?

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: Rob R. On: Thu Jan 23, 2014 10:30 am

Those heat exchangers are not getting close to a 130k btu/hr load if the boiler loafs along like that. Colder air and more airflow through the exchangers will increase the load.

Do you plan to fix the tankless coil? That would be an easy way to load the boiler.

For the time being, if you don't see any clinkers in the ash and there is a few inches of fire on the stoker by the end of a heat call, I wouldn't worry about it. When you get it to a more permanent state and are burning more coal, it will be easier to tune.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Thu Jan 23, 2014 10:44 am

I just went out and checked on the boiler, it was on a heat cycle, the temp was about 175. I was out there for a few minutes, when I look at the temp again, it was 170, dropping while the stoker was still running. That blower I installed yesterday has really changed the load on the boiler!

Feed rate adjustment;

The output side of the gearbox has six threaded holes starting near the center, spirilling out towards the edge. The hole closest to the center is the lowest feed rate, the one at the outer edge is the highest feed rate.

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We will call the lowest feed rate hole 1 and the highest feed rate hole 6. I had it set on 3 and it seemed that the boiler was having trouble keeping up AND as Rob pointed out there was a good 5" or so of ash on the end of the grate. I moved up two steps to 5, I am waiting to see what that does.

Keep in mind that the linkage has a lot of ware. The large lever that the gearbox drives back and forth moves at least 1/4" before the grate starts to move. 5 is also the setting that was used by the previous owner.

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Thu Jan 23, 2014 12:44 pm

OK, this is what we've got after an hour with the thermostat turned up all the way and after a good 12 minutes or so of a heat cycle. I took the photos as the water temp got to about 175 or so, just before the shuttoff point.

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Flue temp gets to about 250 when on a heat cycle.

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This feed rate may be slightly to high. Lit coal up to about 2" from the end of the grate. I will leave it for now and see how it goes.

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: Rob R. On: Thu Jan 23, 2014 1:33 pm

That fire looks much better to me, but you will have to monitor things and see what kind of cycle times you get and if there is too much temperature overshoot. You can always feed less coal, but I would reduce the air as well.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Yellow Flame, A Christmas Stoker Boiler

PostBy: StokerDon On: Thu Jan 23, 2014 2:19 pm

Rob,

I have been concerned about the amount of combustion air all along. I have the choke as far closed as it will go without bouncing off of the coupler. I think what I need to do is take the crapy sheetmetal screw out, drill and tap the blower housing to about 10-24, steal the choke off of the other stoker mech, do some grinding on the current choke so it fits better, mount the second choke plate on the top side of the blower. Doing this will give me the ability to choke down the combustion air to were it needs to be.

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I'll do that in my spare time.

-Don
StokerDon
 
Stoker Coal Boiler: Yellow Flame "Competion Series" 3 grate boiler
Hot Air Coal Stoker Stove: Alaska Stoker1? can't figure out these dern Alaska names!!! It's a big old black one.
Hand Fed Coal Furnace: Harman SF3500
Coal Size/Type: Rice and Chestnut
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Visit Lehigh Anthracite