Freddy - I have a HVAC guy helping with the installation as its a big job. I under estimated the initial effort for the setup, installation, and operation of the unit. However, I enjoy these projects immensely. Next house will have the layout better suited for coal delivery. I am currently planning on storing the coal outside on pallets under a deck, and fill a 96 gallon drum as a bin for the first year. I originally thought about building a 8' x 6' bin with coal shoot to the outside, but then would not have room for my woodworking machinery.
My folks installed a DF-520 when I was younger (30 years ago), and it didn't seem like it was as much work back then to install!
They live in PA where its possible to have coal delivered right into their coal bin. Here in MA its mainly bagged which makes it more laborious to operate a coal boiler.
Stoker-man - I did install the L6006A, and hope it works. I want to set this up for my parents DF-520 since the flame out occurs often on his system during the summer, and ends up with coal in the ash bucket at times. I should have the heating zones plumbed and wired soon so I can test out the coal operation.
Thanks for the feedback!