When doing original set up, and running hard, "I" set up my Kaa-2 stoker to run one inch of ash at the end of the grate. Keystoker says (while no demand for heat) fire should shrink to about three inches, with about three inches of fresh coal above fire. Now, very seldom do I see one inch of ash on my grate. Most of the time I see 2, 3, 4, or 5 inches. However, should my kaa2 need to run flat out, I know it's properly set up to do so, without pushing fire off the end of the grate. This is done with stoker feed rate ajustment, not air adjustment. Air adjustment is done using manometer, draft gauge, etc.. Oliver EDIT: Last night I replied to this post by memory. I read my owner's manual just now (older version), and realized I misspoke. Above reply has been corrected. My manual (older version) says nothing about ash at the end of grate. Apparently the newer manual does. The important thing is not to push fire off the grate when running hard. I also had the newer version of owner's manual, but gave it away to someone else who was installing a Keystoker boiler.
Last edited by oliver power
on Sun Dec 01, 2013 10:15 am, edited 2 times in total.