too much unburnt coal

too much unburnt coal

PostBy: Peasefamily On: Thu Jan 22, 2009 8:35 pm

new to my koker...almost been one full week. Husband's noticing a lot of unburned coal in the ashbin. is this because of the feed rate? if so, how much do we back it off? and is that because it's 25* warmer this week than last? Hubby says we're going through 3/4 of the 240 lbs. hopper a day...that seems high to me.. is it?
Peasefamily
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160

Re: too much unburnt coal

PostBy: MrP57 On: Thu Jan 22, 2009 8:46 pm

It could be your feed adjustment, and or too many pins in you timer running the feed too long. I have 3 or 4 pins in my timer at three different positions. Play with the feed stroke and see what happens in a day or so.
Gary
MrP57
 
Stove/Furnace Make: Keystroker
Stove/Furnace Model: Koker

Re: too much unburnt coal

PostBy: CoaLen On: Thu Jan 22, 2009 9:30 pm

I'm down to three sets of four clips on my timer. I have minimal hot coal during extended idle.
My stoker screw is out about 7 or eight turns.

I've been burning 80#/day during January and had a couple days of 120# when the temps were very low.
My ash is pretty much the "granola" texture with very few pieces of unburned coal.

Keep in mind the clips and timer only make a difference when the stove is idling. When it's cold out and the thermostat is calling for heat, the timer, although still running, has no effect on the stoker time.

-Len
CoaLen
 
Hot Air Coal Stoker Furnace: Keystoker Koker
Coal Size/Type: rice

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Re: too much unburnt coal

PostBy: Peasefamily On: Thu Jan 22, 2009 9:54 pm

coal len- sorry for my ignorance, the manual is a bit lacking. the adjustment nut...which part are you supposed to turn? the end, middle, the whole screw? seems really tight to turn....
Peasefamily
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160

Re: too much unburnt coal

PostBy: CoaLen On: Fri Jan 23, 2009 7:19 pm

There's a gray rectangular tab under the nut on the end of the adjusting rod. Just turn the rod by holding the tab in your fingers. I have mine turned out 7 or 8 full rotations. I believe it comes set at four turns out. Just turn this with your fingers. Don't put any tools on it.
I'm attaching a photo of the adjusting rod. It's located under the hopper and above the expanded metal cage on the back of the furnace.
I hope this helps...
-Len
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CoaLen
 
Hot Air Coal Stoker Furnace: Keystoker Koker
Coal Size/Type: rice

Re: too much unburnt coal

PostBy: mcrchap On: Sat Nov 28, 2009 5:13 pm

Sounds like you bought more rock than coal. Slate is black too. Don't know where you live but if you are near Mt. Carmel Harmony Coal mines has a great product. People call what you are burning "boney coal".
mcrchap
 
Hot Air Coal Stoker Furnace: Keystoker A 90
Coal Size/Type: rice
Other Heating: New Yorker Oil boiler
Stove/Furnace Make: keystoker
Stove/Furnace Model: Econo

Re: too much unburnt coal

PostBy: steevesj On: Sun Nov 29, 2009 8:57 am

Peasefamily wrote:new to my koker...almost been one full week. Husband's noticing a lot of unburned coal in the ashbin. is this because of the feed rate? if so, how much do we back it off? and is that because it's 25* warmer this week than last? Hubby says we're going through 3/4 of the 240 lbs. hopper a day...that seems high to me.. is it?


When I had this problem with my KA-6 it was because of lack of air. I increased the air and it helped.
Jon
steevesj
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA6 dual fuel using rice

Visit Lehigh Anthracite