I checked the settings last night, and here is what I found.
Low limit is 140 degrees
High setting is 205 degrees
The differential is 15 degrees.
My coal feed is set at 4 teeth.
The air is set at 5 1/2.
My timer runs twice an hour for about 80 seconds.
I've never seen the boiler temperature more than 170. I guess I have kids and a wife who "love thier hot water".
Do you feel the air is set too high? I see the manual reccomends an air setting of 4 with 4 teeth, and too much air can cause what I am experiencing (more clinkers, larger ash ring, and no "black spot" in the center). Why do you feel the plumber would have set it this way? Is there a reason he would have wanted to do that?
I am not experiencing any out fires, and the coal feed pipe is cool to the touch.
Should I turn down the air?