Sounds like you have the power vent set way too high. It is sucking all the heat right out of the stove.
The only way to check draft is with a manometer. Most use a Dwyer Model 25. After you get the manometer, you set the power vent rheostat to whatever you need to to achieve the correct draft. After that the stove should create enough heat to radiate out into your living area. Toughing the pipe is not a good indicater. Most power vent pipes are double wall. The center is for the exhaust. The outer ring brings in the fresh combustion air.
The combustion blower should be running full blast. This will give you the best burn. If your coal is all burnt, it is doing its job. However you should make sure all the holes are open and that there are no fines under the grate which would restrict airflow.
The 1-5 dial should only control the amount of coal being fed to the burner. At the setting of 5 or close to it, burning coal should be falling off the grate. At the lower settings, there should only be a small strip across the grate that is burning. Only you can determine what the settings should be.
If you can provide your location, there may be a member nearby who can check out your setup.
Any other questions, feel free to pm me a phone number and I'll call you and try to walk you through this.
That stove should be producing some serious heat.