Well, unless it's calling for heat, the fire will be towards the back when it's on idle. it won't be all the way to the front. There should be about 1" of ash in the front if it's adjusted correctly and calling for heat.
Do you have a thermostat hooked up? Is it calling for heat?
What are you setting on the control box? on/off times.
COAL takes time to respond. It make take an hour or more for it to get really burning good. WHEN you first light it, it has to burn up all the coal until it get ASH in the front, that is normal operation. It will only feed a little bit at a time, depending on the settings on the Controls Box and the demand for heat.
there should be a feed adjustment on the back.
YOu can probably to the the Harmen website and get a manual if you don't have one.
Also, do a search on here or youtube if you need to see what it should look like. Here is one.http://www.youtube.com/watch?v=54HXhXv9 ... r_embedded
As you can see, there is no fire directly in the front.