Just an update for those reading this thread, I rewired my superstor zone valve off a separate relay so it does not pull in with the triple aquastat on the boiler.
This results in the boiler stoker not coming on until the boiler water temperature reaches the low limit. This made a world of difference with the boiler now running at the low temperature end instead of being near the high limit all the time.
This allows me to run the outfire (hold fire) timer more often with no worry of heating up to the high temp limit. I now am using a setting of 60 minutes for the outfire timer with it running the stoker for 4-1/2 minutes. I am experimenting with different times to see which setting uses less fuel. At this setting with a family of 5 using hot water, it runs for 2-1/2 hours per day, using a little over 18 lbs per day of coal, at a cost of under $3.
The dump timer is set at 70 minutes and it is set to run the stoker for 20 minutes. As it would only come on if the high limit was preventing the stoker from running on the outfire timer, it never has to come on anymore, saving fuel.
Both timers will reset to 0 if there is a natural call for heat.
I am running 3 teeth, 3 air, 150 LL, 200 HL.
I also updated the LOGO program so it counts and displays the outfire daily stoker calls, counts and displays the dump zone daily calls (0 lately), and instead of monitoring the ash time based off calender hours, it bases it now off stoker run hours. This is nice because it only runs 2-3 hours a day in the summer, so it is set to call my cell phone when it reachs 10 hours, which is less than 2/3 full on a bushel basket. It is programmed to only call me on ash removal between the hours of 6 am to 10 pm.
The LOGO ash timer resets every time the fines lever is pulled. If I had it to do it again, I would just wire in a momentary switch to reset the ash time. This would allow you to pull your ash lever more often in the summer without resetting your ash timer to 0.
Besides total stoker run hours display, the LOGO also displays the daily stoker run minutes for Monday, Wednesday, Friday, Sunday, so you have time to compare them to heating degree days in winter.
Attached is the updated program. If anyone wants a copy of it, I can send it to you.
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