Vampiro wrote: Mozz what is the maximum size for the steam outlet?
My AA130 has a 3 inch outlet on top. There is a 2 inch reducer in there when i bought it(former owner had it running steam also). When i ripped the old oil burner out i basically slid this boiler right under the same spot with a 2 inch steam header right there and hooked it up, then did the return and Hartford (spelling?)loop. Get the books on steam heat.
Mine has a 3-4 inch base on which the boiler sits so the auger is that high off the ground inside the bin. There's 500 lbs of coal which never make it to the auger. Last time i was at the Williamsport PA. AA factory, he had a separate motor modification available to run the auger and the original motor to run the fan. I put in a new sealed bearing motor (1/3 hp?)and new belts and haven't had a problem with any of the drive in 5 plus years. I grease and oil anything and everything that moves on the first of each month. Yeah, i have a drip pan under the auger roller bearings but cheaper than a new auger.
I have 1600 sq ft 2 stories, dhw and 800 sq ft unfinished basement w/stream. I can't say how much coal it uses for hot water in the summer but i once figured electric would be a little cheaper but it keeps the basement dry and the floors warm when it is like now 40-60's outside.
I have the old mercury thermostat with the anticipater set for coal and don't really have much of a swing in temps. Some rooms may be hotter than others but i slowly tune the steam adjustable valves each year. I don't think i have ever seen 1 lb steam on the gauge and it doesn't really seem to run that much at all in the winter.
I should have put hot water baseboard in here before we repainted, floored and receiling-ed each room but in a way i don't mind the steam. grew up with it. We lose power each year with bad storms and when my neighbors have to leave and get a hotel room after a few days, i still have heat for a long time the first day before i have to bring out the generator.