Siff wrote:I can tell you what my setup is. I have not had my furnace dump for a while now. (also my first season with it)
First off I am burning buck, so rice is going to be different.
I have the aquastat set at 160 lo, 180 high and a diff of 10. The dump aquastat is set at 215. To help the aquastat read better I soldered together a deeper well and put some heat transfer compound down there. That helps a little bit with the dump aquastat reading the correct temperature.
I also just tap the pressure relief valve every time I fill the hopper since I have noticed air getting trapped in that chamber.
My timings are what I finally have down, this may seem low but I have on for 12 sec, off for 5 min, with the blower speed on medium and the feed rate all the way down.
I'm sure it will be different if you have rice.
The main thing I did was set the dump aquastat to 215. It won't trip until the boiler gets to about 220-225. But with the low idle timings it doesn't get that far up very often, even after a long call for heat and a bed full of coals.
Everything I said might be useless for you, but I hope it helps a little.
I have a similar problem, but I have a differential of ~25 degrees. Where did you get the heat transfer compound, is that a home store item?