I burn both wood and stove coal in a Yukon Eagle furnace that I use on weekends. To heat the house on a Friday 5pm arrival, I pile in 50 lbs of coal and then create a wood fire on top -- The wood fire heats the house immediately and eventually starts the coal going, er um, about 11pm. The next day I burn coal. I have to stop adding coal and let it die down a bit on Sunday start the switch over to wood. I don't want to leave at 5 am on Monday with a big coal fire. Friday 5pm I shake, shake, lift and sieve the remaining cold coal with a pitch fork and then add the new coal, wood and repeat.
I too have a Yukon Eagle (Klondike) furnace. It's the primary heat for our 2500sqft ranch in the U.P. of Michigan. I will start with a wood fire to get a hot bed of embers, then pile on the coal. I usually burn a couple of days, and after several shakedowns, I'll burn wood for half a day to again create a quick hot bed of embers that also burns off any of the unburned anthracite coal. Every once in awhile, after a shakedown, the new coal pile is slow to get up to speed. So, I simply (and gently) place a few small pieces of wood on top of the pile. What that does is get the furnace temps up to good warming heat very quickly, and the additional updraft caused by the wood burning gets the coal pile going bottom to top. Works well for me.