gaw wrote:My Keystoker goes cold only if I turn it off or the power fails, which is not too often around here. (knock on wood)
My theory/belief is that a coal boiler should be set it and forget it, much like a gas or oil fired boiler, anything more complicated than that is not worth my trouble. My feed rate was set in winter to accommodate my heating needs. I feed just enough to get the job done and that is about in the ballpark with what you report, about 10 – 12 turns but who is counting? Having good draft my air flap under the large blower is about wide open and the little continuous blower is about 1/3 open, (an eyeball guess). Keystoker says 140 -180 on the aquastat in summer and 160 – 180 in the winter. I am simple and lazy or maybe simply lazy but I keep the aquastat at 150 – 180 year round. Actual summer temps are usually under 180 so no overheating issues. As for the timer, mine is the old style. It takes about 14.5 minutes to complete a revolution. During that revolution it turns the big motor on to run the large blower and feed coal for 45 continuous seconds.
My suggestion would be to troubleshoot your settings one by one to figure out where the trouble lies. You have to look at things like draft, damper settings, air settings, timer settings, feed settings, dirty grates, chimney partially blocked by fly ash, and more. Do a full evaluation of the system and fully check everything in some sort of systematic approach. The shotgun approach is usually a waste of time and fixes nothing. Good luck with the trouble shooting.
Rob R. wrote:Burning rice is much more forgiving in summer operation. In three years I never had an EFM go out until they were all burning buck. Eventually you will find a balance that keeps the fire alive without getting the boiler too warm, but it is trial and error.
gaw wrote:I burn rice and ash looks about like during the heating season with the odd piece of unburned getting through I guess because you never have a raging fire going. It is not a lot as in “wow look at all that unburned coal in there”
I started burning buck because it was easier to get but have switched to rice when I bought a direct vent stove that calls for only rice. I want to keep one size coal only, keep it simple. The buck rice mix was real popular years ago with the old time Keystoker users. I never tried it. I can say that rice feeds a lot easier than buck and the feed settings must be adjusted accordingly. You may have to increase your feed a couple of turns but I don’t know for sure because you were burning the mix and I don’t know how that feeds compared to rice. Increasing time on the timer may compensate and get you through the summer but you will find out this winter when you can’t get enough heat. I think Keystoker recommended 7 turns on the feed nut as a general starting point for using buck.
PRengert wrote:Been there, done that.
With buck I needed to about double the timer setting (I used 2 groups of 7-8) and cut the feed by 2 turns or so for late spring-early fall operation. Secondary blower was full open.
With rice I run the same settings all the time.