Keystoker 90

 
Phil May
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Post by Phil May » Sun. Nov. 28, 2021 3:20 pm

I got a keystoker 90 stove cleaned it all up. Installed it and started it up. I got to think something is not right. Running full air and feed it does not seem to get hot enough. The house it is in is under 1000ft it cant even make 68 inside. You can put your hand on the pipe and the top of stove. I have not set the baro but the thing has not shut off yet. There is no way its making 90k BTU


 
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nepacoal
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Post by nepacoal » Sun. Nov. 28, 2021 4:57 pm

Did you clean the fines out from under the grates? Clean the fan blades on the combustion fan? You should only have about 1.5 inches of ash at the bottom of the grates .. A picture of your fire would help with the diagnosis.

 
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nepacoal
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Post by nepacoal » Sun. Nov. 28, 2021 4:58 pm

A out of adjustment baro can waste a lot of heat up the chimney...

 
Phil May
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Stoker Coal Boiler: EFM 700
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Post by Phil May » Sun. Nov. 28, 2021 5:57 pm

The Baro Should be closed when the stove is running right. I took the grates out and completely cleaned everything.

 
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nepacoal
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Post by nepacoal » Sun. Nov. 28, 2021 6:18 pm

My baro will open up about halfway or 45 degrees during a long burn with no wind outside... It all depends on your chimney's draft. Where do you have the weight set. I'd start with the weight set at 4.5 to 5 and then fine tune it once a manometer is available.

 
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nepacoal
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Post by nepacoal » Sun. Nov. 28, 2021 6:21 pm

And BTW, the draft on a stoker is taken over the fire, not in the stovepipe. On the 90k, I believe there is a removable set screw in the ash door to use as a port to check draft. I don't have the 90k manual in front of me but typically you want between -.02 and -.03 over fire draft (while fan is running during a long run). The stovepipe draft really doesn't matter if your over fire is set correctly, unless you're using a direct vent system.

 
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nepacoal
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Post by nepacoal » Sun. Nov. 28, 2021 6:29 pm

A picture or short video of your fire would help. The flames should be touching the top of the stove and there should be fire down to within 1 to 1.5 inches of the end of the grate during a long run.


 
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WNY
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Post by WNY » Sun. Nov. 28, 2021 7:18 pm

are you getting a full grate of fire (about 1-1.5" of ash) when demand is calling for heat? Do you have a thermostat hooked up or coaltrol?
is your adjustment screw all the way in and backed out about 3-4 turns?
Unless it burned back too far on the grate (air leak in grate or too much draft) and melted the Nylon Cam Bearing therefore, not feeding correctly.
I maintain a .04 with my direct vent.

 
Phil May
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Post by Phil May » Mon. Nov. 29, 2021 5:04 pm

well so far I have the screw for the pusher turned all the way in it is taking about a 5/8" push. I adjusted the baro to the max setting. It is making more heat now. Still not as much as I think it is capable of though. I will post a pic of fire.

 
Phil May
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Post by Phil May » Mon. Nov. 29, 2021 5:08 pm

IMG_0826.JPG
.JPG | 409.7KB | IMG_0826.JPG

 
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nepacoal
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Post by nepacoal » Mon. Nov. 29, 2021 5:34 pm

Phil May wrote:
Mon. Nov. 29, 2021 5:08 pm
IMG_0826.JPG
The fire should be within 1.5 inches of the end of the grate during a long heat call with the last 1.5 inches being ash. You'll have a lot more heat once we figure this out...

If your pusher block is moving freely, you might need a new stoker motor. I would expect you to be pushing hot coals off the end with it 3 turns out. Just to make sure, you have the adjustment screw turned clockwise all the way in, right?

Here's a quick shot of my keystoker near full burn. It's a bad angle because my door is on the side but it shows a good fire...

Attachments

.MP4 | 21.3MB | VID_20191226_131025928.mp4

 
Phil May
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Stoker Coal Boiler: EFM 700
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Coal Size/Type: Rice

Post by Phil May » Mon. Nov. 29, 2021 5:42 pm

That pic is at full feed screw turned all the way in. It is only taking about 5/8" per push

 
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WNY
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Post by WNY » Mon. Nov. 29, 2021 5:46 pm

do you have a thermostat or coaltrol hooked up to demand more heat ? otherwise it may just run off the Idle Timer. if nothing else is hooked up. you have to turn up the thermostat above the room temp to create the demand for heat and the stoker should run constantly until it's satisfied and then it will go back to the idle timer. Mine (relay box) clicks when the thermostat is turned up and makes the stoker feed constantly.

Draft won't affect how much it's burning, that the feed and demand. what do you mean be MAX setting on the baro? You need to check the draft with a gauge on the stove. otherwise your are just guessing.

maybe the nylon pusher wheel might be melted if it back burned? and not pushing a large amount of coal.

 
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nepacoal
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Coal Size/Type: Buck

Post by nepacoal » Mon. Nov. 29, 2021 5:50 pm

It should be pushing hot coals off the end when screwed all the way in... Did you use furnace cement to seal up your grates when you reinstalled them? If so, did you smooth down the cement? That fire looks a little wonky like the grates are rough and impeding the flow and possibly have a little air leaking on that upper right side.

 
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nepacoal
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Coal Size/Type: Buck

Post by nepacoal » Mon. Nov. 29, 2021 6:00 pm

Is this vented into a chimney?


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