Re: KA6 Coking up in the Grates
Posted: Wed. Feb. 05, 2014 8:41 am
Look at my pics and it's down when it was half open.
Using anthracite or bituminous coal for residential and commercial heating.
https://coalpail.com/coal-forum/
From page 4: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.
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.
Okay, you got it. Hope you get it solved.BennyLumpkin wrote:Look at my pics and it's down when it was half open.
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.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.
Thanks Larry, good to see I wasn't alone on this observation.blrman07 wrote: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.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.
No doubt.Carbon12 wrote:Actually, even with the flap closed, it still blows air to the fire, just less air.
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.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.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?
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?gaw wrote: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.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?