Making Progress, but Still Need Some Keystoker Boiler Advice

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
sinistrafatboy
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Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 3:22 pm

Hello again, I have had some success with maintaining a fire in my k6 boiler, but have had a couple flame failures because the boiler has met the temperature setting and there is no call for heat. Therefore the stoker never runs for long periods and the "pilot" flame burns up all the available coal and goes out. Any suggestions on what to adjust first? I was running the small blower with the damper half open but found that the small fire would last longer with less air. Also, does rice coal vary greatly in size ? The first bags I used, the coal was very small (like chicklets) whereas the next few bags have been the size of large milk duds. It seems the small blower damper would have to be adjusted for these different sizes. Thanks for your input Chris


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Wiz
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Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 5:58 pm

What is feed rate? Timer settings/pins? Have you check draft with manometer? Air shutter open?
Randy
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sinistrafatboy
Member
Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 6:07 pm

I thought I was set at 12 turns of the adjustment nut. My timer is set for one minute in fifteen. Draft through the inspection door is .02. The shutter on the stoker blower is opened maybe an inch. And the small blower (when I had multi-day run time) was not quite a 1/4 way open

sinistrafatboy
Member
Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 6:08 pm

That draft should rea-.02 sorry

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Rob R.
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Posts: 11346
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Nov. 08, 2013 6:44 pm

12 turns....from maximum feed? Wiz can confirm this, but I think you turn the adjustment nut all the way to maximum feed and then count the turns as you back it off.

You may need to run the timer more often, or longer.

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Wiz
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Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 7:09 pm

sinistrafatboy wrote:I thought I was set at 12 turns of the adjustment nut. My timer is set for one minute in fifteen. Draft through the inspection door is .02. The shutter on the stoker blower is opened maybe an inch. And the small blower (when I had multi-day run time) was not quite a 1/4 way open
12 turns for rice is max. I would suggest 14 turns on feed nut. Timer try 2 groups of 5 pins (1min 15 secs) every 15 mins, if that doesn't help add 2 pins.. Inside of timer door will show 3 groups of 5 pins diagram this would be the way to go if 6 pins don"t work

check this post out for help Keystoker KA-6 Operation Guide.
Randy
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Rob R.
Site Moderator
Posts: 11346
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Nov. 08, 2013 7:11 pm

sinistrafatboy wrote:Also, does rice coal vary greatly in size ? The first bags I used, the coal was very small (like chicklets) whereas the next few bags have been the size of large milk duds.
Perhaps your coal is "buck" size.

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Wiz
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Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 7:15 pm

Rob R. wrote:
sinistrafatboy wrote:Also, does rice coal vary greatly in size ? The first bags I used, the coal was very small (like chicklets) whereas the next few bags have been the size of large milk duds.
Perhaps your coal is "buck" size.
if it's buck size 9 turns is max.. I'm running 12 for buck
Randy
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sinistrafatboy
Member
Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 7:55 pm

Set me straight, I would run the adjustment nut up towards the stoker arm and then back down 12 full turns? And unfortunately this is the second home for this boiler and it came with a timer that has two disc and a adjustable detent so only one run period per 15 minutes is possible. I'm still wondering about the timer not activating the stoker when the boiler has reached temp?

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Wiz
Member
Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 8:13 pm

Your correct on feed nut. Make sure stoker arm is being pulled back towards motor. Then count turns on red nut. Not familiar with your timer, someone will chime in. Your saying timer doesn't stoke boiler at all?
Randy
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sinistrafatboy
Member
Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 8:23 pm

The timer works fine until the boiler has reached set temp (180') but as long as it at that temp does not drop, like during the night when there is no call for heat, the stoker does not run and the small pilot fire goes out. Then the temp will drop on a call for heat so coal will feed but not ignite.

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Rob R.
Site Moderator
Posts: 11346
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Nov. 08, 2013 8:26 pm

Your timer must be tied in prior to the high limit control.

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Wiz
Member
Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 8:29 pm

imo.. get newer style timer.
Randy
If you have time to make a post looking for free advice, then show some appreciation and say thank you.

User avatar
Wiz
Member
Posts: 926
Joined: Sun. Nov. 27, 2011 8:45 pm
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Fri. Nov. 08, 2013 8:32 pm

Rob R. wrote:Your timer must be tied in prior to the high limit control.
Rob here is his timer. might help you walk him thru it
Randy
If you have time to make a post looking for free advice, then show some appreciation and say thank you.

sinistrafatboy
Member
Posts: 29
Joined: Sat. Jan. 14, 2012 5:36 pm
Stoker Coal Boiler: Keystoker K-6
Location: Greene NY

Post Fri. Nov. 08, 2013 8:34 pm

Yes it is indeed. Is that incorrect? As I mentioned this is an older unit and does not have a triple aquastat. It has seperate controls, aquastat, low water cut off, circ relay, high limit and that disc type timer. I was thinking of getting the timer before the aquastat so it would always energize the stoker but was a little hesitant.


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