My 1537G Hotbalst US Stove burning nut coal

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Sun Mar 01, 2009 10:35 am

Started burning coal again this morning at 8:30. So far, so good. I have the draft inducer fan mounted to the door and the damper door on it almost all the way closed. The coal bed is about 1/2 to 2/3 full and coming up to temp. I will report back in a couple hours! :D
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Sun Mar 01, 2009 12:02 pm

Update...

Furnace is loaded to almost the top of the firebrick. (down about 3/4") DIF is on and the damper is barely open. Baro is uncovered and draft is .05 to .06. Flue temp before baro damper - 690, after baro - 390, Heat ducts at first elbow are about 160. Temps are measured with a thermocouple probe inside pipes.
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: gitrdonecoal On: Sun Mar 01, 2009 1:19 pm

thats all looks like a nice clean job. i've seen a few people doing the draft inducer on the ash pan door. i never had to do this to my 1557. ash pan spinner is all i need. i have the thing set one to 6 turns, depending on how much heat i need. i guess im one of the lucky ones
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
Stove/Furnace Model: Hotblast 1557

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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Sun Mar 01, 2009 2:11 pm

broughy84 wrote:i have this exact same furnace... You have me thinking now!!! So all you did was drill and tap the grates for a small set of bolts? What about the ash door? Can you still open it completely? I take it this is just drilled and tapped too? How about electrical wiring, is the play in the wire enough to facilitate de-ashing?


I drilled and tapped the front grate and put in 1/4" bolts to tighten up the play. The ash door was also tapped for 1/4" bolts. The door still opens completely. The wiring from USSC was not long enough to reach up front so I put on a 5' piece of mc cable.

Currently the house is at 71, the DIF is off, draft is .05 to .06, flue is at 380/235 and heat ducts are at 122. I am a happy man! :D
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: tprice18 On: Mon Mar 02, 2009 3:51 am

How is the Nut Coal working for you? It seems to get stuck in the holes in the 1537G Hotblast grate making it difficult to shake because it causes jams. Also, makes it difficult to clear the ash once the coal starts filling the grate holes. Maybe, once I get a good burn going I won't have this issue... I am new to the coal burning life and am studying as much content on this forum as I can. My first batch of coal is bagged Blaschak. I have 1/2 nut and 1/2 stove. I had what I thought was a good burn going the first day or so but it died out. I believe it was becuase my coal bed was not deep enough (learned from reading the posts) and a build up of ash that won't clear.

Today I have some Stove and Nut mixed together. The coal is only about 1-2 inches from the top of the firebricks now. I had a very hot wood fire going as well and was getting readings of .09 WC when putting the hose right inside the ash door knob. You would think that would be enough to keep the coal going but it seems to really die down after a couple hours when left alone. Is that an ok location to get a draft reading or does it exagerate the readings due to a near venturi affect?

Keep your pictures, data, and words of wisdom coming. I too want coal burning to be successful!

Thanks-

Tim
tprice18
 
Stove/Furnace Make: HotBlast
Stove/Furnace Model: 1557M

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: gitrdonecoal On: Mon Mar 02, 2009 8:06 am

tprice18 wrote:How is the Nut Coal working for you? It seems to get stuck in the holes in the 1537G Hotblast grate making it difficult to shake because it causes jams. Also, makes it difficult to clear the ash once the coal starts filling the grate holes. Maybe, once I get a good burn going I won't have this issue... I am new to the coal burning life and am studying as much content on this forum as I can. My first batch of coal is bagged Blaschak. I have 1/2 nut and 1/2 stove. I had what I thought was a good burn going the first day or so but it died out. I believe it was becuase my coal bed was not deep enough (learned from reading the posts) and a build up of ash that won't clear.

Today I have some Stove and Nut mixed together. The coal is only about 1-2 inches from the top of the firebricks now. I had a very hot wood fire going as well and was getting readings of .09 WC when putting the hose right inside the ash door knob. You would think that would be enough to keep the coal going but it seems to really die down after a couple hours when left alone. Is that an ok location to get a draft reading or does it exagerate the readings due to a near venturi affect?

Keep your pictures, data, and words of wisdom coming. I too want coal burning to be successful!

Thanks-

Tim

once you master the ins and outs of burning coal shaking down should be a breeze. coal is a learning curve. i have been burning straight stove in my 1557m most of the year with all the cold we've had. the past week i burned bagged blachak nut and i actually found it shakes easier. of course, the stove coal was free from some guys basement and god knows how old it was. you could tell some deterioration in the coal. when you shake the grates, use a short, choppy motion. also, you may need to poke from underneath with your poker, or a homemade poker through the grates until you see a nice red glow through the bed. i have to do this to at least my rear shaker grate for it does not shake down nearly as good as the front grate.
good that you noticed that the coal was not deep enough. but, i would try to fill er up right to the top of the brick, and even maybe mound a little bit in the middle. now, you had the manometer reading at the ash pan knob? i have mine installed in the stove pipe before the barometric dampner. do you have a barometric dampner? tell us more about your set-up (dampner settings, draft fans, chimney type, height, ect.) we will get you where you need to be.
welcome to the forum :up:
John Mud
gitrdonecoal
 
Hot Air Coal Stoker Stove: Keystoker 90
Stove/Furnace Make: USSC
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Mon Mar 02, 2009 10:42 am

So far we have a good 24 hours of burning! :D The t-stat is controlling the DIF on the ash door an is able to maintain the temp we set it to +/- 2 degrees. A better t-stat would take care of this. Shook it down last night around 8:30 and again this morning around 7:30. I added 50# of coal to it and could actually put in a couple more shovel fulls. Outside temps were around 10 last night with a good wind and a very poorly insulated house! We set the t-stat at around 68 for the night and 72 when we are here. I got about 2 trays of ash this morning and it shook down pretty easily. I have no slop between the front and rear grates so the rear shakes down as easily as the front. I shook until I had larger red coals fall through and the entire underside of the grates glowed orange.

Here are the current numbers...

DIF is on and the damper for it is barely open (see pic). Draft is .07 - .08. Flue temps are 658 before and 389 after baro damper. The 2 heating ducts are 152 and 139 degrees.

Image

Here is the current coal bed...I added 3 more shovels (finished the 50# bag) after these pics.

Image

Image

Ash bucket.

Image

What is this? These came out of the ashes. Is this the "clinker" stuff talked about?

Image

Image
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: broughy84 On: Mon Mar 02, 2009 1:08 pm

Looks like a slick setup... Definitely going to be getting mine set up similar to that when I decide to stop burning. It's suppose to get up to the 60s this weekend so I probably will shut er down and clean it out this Saturday.

Yep, that's a clinker!
broughy84
 
Stove/Furnace Make: US Stove
Stove/Furnace Model: 1537G

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: Putt On: Mon Mar 02, 2009 2:22 pm

Ran through my first batch of coal last night.. Started a wood fire around 2000, started adding a Reading rice a little at a time.
Still seasoning the grates and keeping the heat down a bit.. Around 2200, I had just about a full 40# bag into the firebox.
No Baro yet, so closed down the MPD a bit, and opened the ash-pan draft about 6 turns. This morning, gave it a shake,
poked up through the grate, down along the surface of the fire-brick and down through the center of the coal. It is now
12:20 and am still getting heat. I will let it go out and cool down, then cycle it again... I have a couple bags of nut that
I will use probably in a few days, I did find that the rice does like to have a bit more air :). The stove would probably breathe
a lot better with the nut. But, I did find out that the 1537 WILL burn rice without much difficulty...

Putt...
Putt
 
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LsFarm On: Mon Mar 02, 2009 3:00 pm

Those pieces are what is found in a clinker.. those are too small to really be called a clinker.. clinker-ettes? If you burn really hot you may get a lot of the minerals, sand, ash etc to melt together and be come a book-sized clinker.. one that covers a whole grate or the floor of the firebox.. A clinker can be big enough to block almost all airflow to the fire, resulting in a slow, low temp fire..

I've had clinkers the size of a phone book. Here are a few stacked up.

Greg L


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LsFarm
 
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Mon Mar 02, 2009 6:20 pm

I need an opinion now...

We are heating around 2500 sq ft including the stone foundation basement. This is a 1900 house with very little insulation. The outside temps have been in the teens today with a light wind and a wind chill of around 5 - 10 degrees. The furnace has been cranking along all day and is just maintaining 70 in the living room. I opened up the DIF damper another 1/4" from the pic above. Current temps are flue - 682/383, heat ducts 150/145 and draft of .07 - .08. Does this sound right at all? Just seems like it should be a lot hotter than that in here. The coals are almost all glowing with the exception of the very front portion, and with the feed door open you can get a sunburn from 18" away! She is definitely hot inside.

We are considering selling off this unit and buying a Hitzer 82FA or a similar model. Maybe we are simply at the limit of what this stove can do. Either way it is a LOT better than hearing the oil furnace kick on! :lol:
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: DOUG On: Mon Mar 02, 2009 7:29 pm

I'd say you are at the stoves limit. Everything else seems right. But I think you would get more heat out of it with better air flow. The two 8" rounds and the low Cfm fans are probably limiting its maximum heating potential. But then that is redesigning the furnace. You would be better off leaving it the way it was designed to be used. For the money it would take to get a few more btu's out of it, a larger unit would be better. :idea: :)
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Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LiftedAWDAstro On: Mon Mar 02, 2009 8:50 pm

Thanks Doug...that is kind of what I was thinking too. By the time I put the money into having a tin-knocker come and plumb me in larger duct and buy a larger fan, I can just put the same money into a furnace designed for the job.

Since I posted that last reply the house is now up to 72 and slowly climbing. The t-stat will be shutting it down soon. She is still cranking away at around 700/357 at the flue and the heat ducts are at 172/155. It nice and toasty in the basement! LOL I do have to say I definitely like burning coal! We would have had to keep adding wood all day to get these temps and tonight the house would be down to 64 by early morning and the oil furnace supplementing. So, we are at least 1 step ahead.

Thanks for all the help guys! I truly appreciate it. :up:
LiftedAWDAstro
 
Hot Air Coal Stoker Furnace: Keystoker Koker 160
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: broughy84 On: Mon Mar 02, 2009 9:46 pm

Wow i thought my flue temps got high... I guess 400 - 500 isn't that high then huh... 200 will keep our 2510 sqft house at about 70 with outside temps at 15-20.
broughy84
 
Stove/Furnace Make: US Stove
Stove/Furnace Model: 1537G

Re: My 1537G Hotbalst US Stove burning nut coal

PostBy: LsFarm On: Mon Mar 02, 2009 11:11 pm

Hello Lifted,, can you pull air from upstairs via the cold air ducts, and duct it through the 'Hotblast' without heating the basement? if you treat the Hotblast like a regular furnace, with a coal air return from the upstairs and hot air duct to the upstairs then the Hotblast will be much more efficient..

I don't know anything about your duct setup, but just about any form of using the basement as a cold air return is costing you a lot of heat.

Just a thought..

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
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