WNY wrote:You can have up to about 1" of ash at full burn, as long as you are not pushing hot coals off the end when it there is a long demand for heat, you should be good. I think I have mine at 4-6 turns out and works quite well.
Only adjust 1/2 turn at a time in or out depending on if you want more or less feed.
The Extra pins will get you 15 secs of stoke time per pin, so you added 30 secs per cycle on idle. Typically, if you at not having any issues with idle, then the extra pins will just increase the heat just a bit at idle
Have you had the draft checked and adjusted correctly? That will also help in maintain proper heat in the stove.
WNY wrote:I think I have mine at -.04, mine is a direct vent. -.02-.03 is good.
Is yours a direct vent or Natural Draft chimney?
Clinkers will form every now and then, depends on the load, if it's burning HOT for extended periods you may get more, or it's really cold outside and you have a bit more draft and it pulls more air thru and makes it burn hotter. Sometimes depends on the coal. I usually just get small coal cakes/clinkers sometimes, but not very often.
Do stokers have clinker problems?
oliver power wrote:My KEYSTOKER Kaa-2 boiler shares the same stoker as one of the KEYSTOKER stoves. I believe it is the KEYSTOKER 90 as you have. Not positive without looking. Anyways, while reading your post, I too thought you had things down to a science. That was untill reading down the page further, when you said you increased draft. I'd stay at factory draft recommendations. Your thinking on the stoker operation is in my opinion, correct. The slower the coal travels accross the grate, the more it has time to burn. 2 - 2-1/2 inches of ash is a lot at full fire. Hey, if it does the job, that's what counts. I like KEYSTOKER's recommendation of one inch of ash at full fire. Then again, I have a boiler, which stores the heat. When I need more heat, I add pins. Still a slow push accross grates, but more pushes = more coal on grates. My opinion would be to add more pins, not stroke. And leave the draft at factory recommendations, which I see you're still within range.