After enjoying my new 520 from early spring time I was going to shut her down and use electric for DHW this summer. Well a bunch of you, and my boiler man Dave said, "just keep burning" ! Well...........
Today was the last bit of a blue plastic 55 gal. load that has been our coal usage from July 1st .
Dave helped me with the final settings.
Feed, 3 teeth. Air, 5.5 Timer 1.5 min, 2 x per hr. Aquastat is 140 deg. And the bypass loop is full open. We have had nice, plentiful DHW all summer to date.
How did I not know about all this 30 years ago ?
Thanks to all again !