I have a Vogelzang 2500 add on furnace and recently bought a DK-50 draft induction kit. The kit came with install instructions, but no operating instructions. I am looking to know the proper way to use the furnace now that it has the draft kit on it. For instance, do I need to leave the draft door damper (on the door to the ash pan) cracked open? Thanks for helping this newbie out!