Make sure the horizontal run is pitched upward 1/4 inch per foot toward chimney.
Open pipe damper.
Build your fire with newspaper, cardboard and small kindling.
Crack open the nearest window.
Light newspaper twisted up at the top near the outlet inside stove to allow heat to rise and start preheating chimney. It may take a couple pieces of paper. Then light fire with one. Smoke should rise out with doors open. Open air intake, slowly close doors.
Watch thermometer on connector pipe, adding larger wood as fire catches.
Close intake air as temperature increases.
When hot gasses lighter than outdoor air rise in chimney, this creates a low pressure area in chimney, pipe and stove. This allows the higher atmospheric air pressure to PUSH into the stove intake, or open doors feeding the fire oxygen. Any leaks in chimney, pipe, or stove will leak indoor air IN, not exhaust out when the chimney is hot and drafting correctly. (Connector pipes get 3 screws at each joint, no sealer needed)
Opening the nearest window allows the higher air pressure outside to enter home and push into stove making it go. This eliminates the possibility of depressurizing the home with exhaust fans.
The colder outside, the more temperature differential inside the chimney, and the faster it will rise out the chimney. Heavy dense air in chimney, atmospheric conditions such as low air pressure and high altitude having less air pressure to work with are all detrimental to the draft the chimney creates.
Hope you didn’t think the chimney just lets the smoke out! The chimney is the engine that drives the stove. Feed it heat to make it work. Then balance the heat you leave up so the stove can radiate the left over heat into the room, and close the window. (The first fire will cure paint on stove and pipe. It will smoke. Best to fire outside with pipe vertical to burn the worst of the smoke off)
The pipe damper is a chimney control to slow velocity of rising gasses in an over drafting chimney. Control heat output with air intake on stove. If it burns too hard, that is a sign of leakage into stove, or over drafting chimney. If you close pipe damper a little, less than 1/4, check creosote formation frequently until you know how much you create. The more you close it, the cooler the chimney will run. This is the reason for a pipe thermometer to keep the chimney clean at the proper temperature as shown on thermometer. No one can tell you where to run stove or chimney control since it changes with chimney, pipe configuration, weather, and other factors.