Maxnchej, I'm a new owner of the BL-2840, I've been running mine going on five weeks now, so I may be able to answer some of your questions.
1-When I started my BL-2840 for the first time, I had some water coming out of the ash door, it cleared up after a few cycles. It may help to set your boiler temperature to 185-190F degrees for the day, as the temperature goes up, you will have some water expansion which will overflow through the water gauge opening. Another thing I learned, is to be certain the ash door is shut very tightly.
2-Whenever I open the ash door fully, I hear a pulsating sound or vibration which makes my draft blower's air back draft flap rattle, I would imagine this is normal.
3-Once the outdoor temps get colder, the creosote will be minimized.
4-180 with a diff 0f 10 is o good setting. I've been running mine at 185 diff 10 just to keep the glassy creosote under control until colder temps set in which should begin tomorrow, 20's for the highs & single digits for the overnight lows for the next eight day forecast for Wisconsin.
4-I get a lot of smoke coming out the loading door too as I'm loading it. I just bring whatever amount of firewood I need for loading, next to the stove & toss it all in before the wood begins to smolder.
Hope this helps you some.
