KA6 Coking up in the grates

Re: KA6 Coking up in the grates

PostBy: BennyLumpkin On: Wed Feb 05, 2014 9:41 am

Look at my pics and it's down when it was half open.
BennyLumpkin
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6

Re: KA6 Coking up in the grates

PostBy: Rob R. On: Wed Feb 05, 2014 9:42 am

From page 3 of the manual:

Initial coal feed: Advance red nut all the way forward. Then turn it counter clockwise 11 or 12 turns if burning rice coal, if burning buckwheat coal turn coal feed, back 9 or 10 turns. When boiler is running for about an hour under full load grates should have about 2” of dead ash on them before falling into the ash pan.


From page 4:

Location and final placement for red nut will be determined by size of coal you purchase. For rice coal, red nut might be turned down 12 turns for maximum setting, whereas for buckwheat coal, red nut might only be turned down 10 turns from maximum setting.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: KA6 Coking up in the grates

PostBy: BennyLumpkin On: Wed Feb 05, 2014 9:44 am

I think I'm around 11 turns for rice right now.
BennyLumpkin
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6

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Re: KA6 Coking up in the grates

PostBy: blrman07 On: Wed Feb 05, 2014 9:50 am

What's the color of your ash? Depending on the iron content you can adjust that combustion air all you want and your still going to clinker up. Sounds like the coal. You may have had it in your bin since last year but that doesn't matter. If you unit has been running flat out it's running hotter which will form clinkers. A lot of people have developed show stopping clinkers this winter due to having to run their units flat out.

Rev. Larry
New Beginning Church
Ashland Pa.
Last edited by blrman07 on Wed Feb 05, 2014 9:55 am, edited 1 time in total.
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: installing a VC 2310 this summer
Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.

Re: KA6 Coking up in the grates

PostBy: BennyLumpkin On: Wed Feb 05, 2014 9:54 am

White
BennyLumpkin
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6

Re: KA6 Coking up in the grates

PostBy: McGiever On: Wed Feb 05, 2014 9:56 am

BennyLumpkin wrote:Look at my pics and it's down when it was half open.



Okay, you got it. Hope you get it solved.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: KA6 Coking up in the grates

PostBy: blrman07 On: Wed Feb 05, 2014 10:00 am

BennyLumpkin wrote:Yes I know the difference. .... right now it's completely shut. .... draft is correct and no change. When this all started I had it around half open and it always worked fine.


If you had the flap completely shut on the combustion fan you couldn't have a fire much less a correct draft and no change to the fire.
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: installing a VC 2310 this summer
Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.

Re: KA6 Coking up in the grates

PostBy: BennyLumpkin On: Wed Feb 05, 2014 10:05 am

It's been shut for a week and burns perfect. A few guys suggested it so I tried it. Didn't notice much difference.
BennyLumpkin
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6

Re: KA6 Coking up in the grates

PostBy: McGiever On: Wed Feb 05, 2014 10:09 am

blrman07 wrote:
BennyLumpkin wrote:Yes I know the difference. .... right now it's completely shut. .... draft is correct and no change. When this all started I had it around half open and it always worked fine.


If you had the flap completely shut on the combustion fan you couldn't have a fire much less a correct draft and no change to the fire.


Thanks Larry, good to see I wasn't alone on this observation. ;)
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: KA6 Coking up in the grates

PostBy: Carbon12 On: Wed Feb 05, 2014 10:13 am

Actually, even with the flap closed, it still blows air to the fire, just less air.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: KA6 Coking up in the grates

PostBy: McGiever On: Wed Feb 05, 2014 10:42 am

Carbon12 wrote:Actually, even with the flap closed, it still blows air to the fire, just less air.


No doubt. ;)
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: KA6 Coking up in the grates

PostBy: BennyLumpkin On: Wed Feb 05, 2014 8:41 pm

Double checked things when I got home. 8 turns but I have it fast hoping to push the coal off before it cokes up. My air feed it's about half. Draft is right. ... forgot I put it back to that setting. It was up in the mid 30's today and when I got home it was a solid cake on the grates. I just went down and checked it again and pushed a cake off that covered the whole burn bed. It came off the grate in one big piece.
BennyLumpkin
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6

Re: KA6 Coking up in the grates

PostBy: gaw On: Thu Feb 06, 2014 4:21 pm

BennyLumpkin wrote:So I'm at a loss. We've had days in the mid 30's now and it's still doing it. Closed the air feed, adjusted draft again. Slowed the air into the combustion fan. ... even went do far as to wire wheel the grates and sides of the stoker too make sure nothing was built up for it to not slide easily. Even at super cold temps it gets hot enough to go off on its high temp setting so I don't think I'm asking too much of it. ... it did it with the buckwheat coal also but it was pretty cold out. I'm not sure what to try other than different coal again. ... ideas?

You did everything I would have done. I am stumped also. The only thing left would be the coal unless we are overlooking something. If you can get hold of some coal from a completely different source than what you are burning now it may be worth giving a try.
gaw
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice from Schuylkill County

Re: KA6 Coking up in the grates

PostBy: blrman07 On: Thu Feb 06, 2014 4:31 pm

gaw wrote:
BennyLumpkin wrote:So I'm at a loss. We've had days in the mid 30's now and it's still doing it. Closed the air feed, adjusted draft again. Slowed the air into the combustion fan. ... even went do far as to wire wheel the grates and sides of the stoker too make sure nothing was built up for it to not slide easily. Even at super cold temps it gets hot enough to go off on its high temp setting so I don't think I'm asking too much of it. ... it did it with the buckwheat coal also but it was pretty cold out. I'm not sure what to try other than different coal again. ... ideas?


Could you please take a photo of the air feed that you said was completely closed and then a picture of the mechanism you used to slow the combustion air. I am still trying to wrap my head around completely closing the air to the burner and nothing changed.

Looking forward to the pics. They will go a long way....

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

Re: KA6 Coking up in the grates

PostBy: blrman07 On: Thu Feb 06, 2014 4:37 pm

gaw wrote:
BennyLumpkin wrote:So I'm at a loss. We've had days in the mid 30's now and it's still doing it. Closed the air feed, adjusted draft again. Slowed the air into the combustion fan. ... even went do far as to wire wheel the grates and sides of the stoker too make sure nothing was built up for it to not slide easily. Even at super cold temps it gets hot enough to go off on its high temp setting so I don't think I'm asking too much of it. ... it did it with the buckwheat coal also but it was pretty cold out. I'm not sure what to try other than different coal again. ... ideas?

You did everything I would have done. I am stumped also. The only thing left would be the coal unless we are overlooking something. If you can get hold of some coal from a completely different source than what you are burning now it may be worth giving a try.


I just caught the bolded underlined phrase in the quote above. It is getting hot enough to trip on high limit even on the coldest days?

What by chance is your aquastat set at?
blrman07
 
Hand Fed Coal Boiler: Bucket a Day
Hand Fed Coal Stove: installing a VC 2310 this summer
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