These are air tight stoves. Before you shake rev up the fire, turn off the blower, shake with the ash door closed, wait 10 seconds and open ash door to check if you shook enough. if not close ash door and repeat until you see a nice reflected glow and a few coals in the ash pan. Leave ash pan door open. Then you can reload. leave a corner open and burning blue flame until the new coal catches and turns blue then finish the corner.
I usually wait until my stack temp gets to about 200 degrees and then close the ash door and set the draft. Turn the blower back on. It will settle down to where ever you set the draft to. NEVER WALK AWAY AND LEAVE THE ASH DOOR OPEN.