Ask the Great, Merciful and Wise moderator to move this to the Hand Fired Manly Man section! Please. Oh and an offering of Beer or Coal!
The way I understand it
Wide open to start.
Get a bed of coal going.
Once the bed is going slowly add coal to the bottom of the hopper.
Once the bottom of the hopper is reached fill it.
Adjust Chain to #5 cut air to 50% on front slide
See where that gets you and adjust accordingly.
The chain is to maintain the temperature/setting, the front air slide determines heat output, more air more heat.
The barometric damper keeps draft from running wild.
There will be a learning curve. I have a 503 to be installed soon Hitzer 503 Arrives