The boiler is running well, I was surprised how little ash there is so far. It is truly "automatic". The heat exchanger is working well. This was a hell of a lot of work and $$ but I'm happy I did it. The heat exchanger did reduce the air flow in the ducts a noticeable amount, but it seems to be working. I'm still burning the Harman for a radiant heat source and for heat in the kitchen. I'm planning on keeping it for the colder weather, even though the EFM can handle the heating.
The only problem right now is if I raise the air above 5 it pressurizes the firebox, I tried it at 6, no good. The oil-fired DHW heater is still connected to the chimney as well. I had no problem leaving it connected with the Akaska, but it had a much smaller combustion fan, so the air is at 5. I peeked in at the ash ring and yes, there is some unburnt coal, but not much. I have the feed at 4 teeth now and the aquastat differential at 10°. I'll get a 6" cap for the pipe to the DHW heater and cap it off and see what happens. My chimney drafts very well, but there's a limit to everything. The baro is not opening at all. I haven't taken an overfire draft reading yet, the pipe draft stays between -.03" and -.04" WC.
Did you take that draft reading with the boiler up to temperature?
Yes I did. The Man-O-Meter is still connected.
So far so good.
The DHW is good, I think I have the tempering valve set right. The DHW oil burner is OFF. I still keep checking the boiler often.
The leak seems to have stopped.