Damper

[JoakimB81]

I am building an open fireplace.
I have bought a rotary damper. It will soon be time to install it.
I'm not sure how it should be positioned.
Does anyone know?

 

[jonaserik]

If you lay it down to the left, so it rests on the frame, how many positions can you adjust the damper to? Normally a damper should not be able to close 100%, there might be afterglow that can emit gases, if they don't exit through the chimney, they might end up in the house, not good. All types of boilers for wood/oil/pellets are required to have a gap for the gases to escape through.

 

[JoakimB81]

If you place it down to the left, so it rests on the frame, how many positions can you adjust the damper to? Normally, a damper should not be able to close 100%, as there may be embers left that can produce gases. If they don't exit via the chimney, they might end up in the house, which is not good. For all types of boilers using wood/oil/pellets, there is a requirement for a gap that allows gases to exit.

Thanks for the response.
I updated my pictures. There you can see which damper it is. It is not completely sealed. So the damper should rest horizontally?

 

[jonaserik]

How many different positions can you set the damper in? Sometimes, if there are only 2 positions, open/closed. When open, it can create a massive draft in the chimney and the fire may burn quickly. Of course, it also depends on what kind of insert it is, and it comes with different dampers for the draft.

 

[JoakimB81]

How many different positions can you set the damper in? Sometimes if there are only 2 positions, open/closed, when open there can be a heck of a draft in the pipe and the fire wants to burn quickly. Of course, it depends a bit on what kind of insert it is and if it has different dampers for the draft.

There are 3 positions + closed position.

 

[jonaserik]

There are 3 positions + a closed position

Great, then you can regulate the draft in the pipe and after maybe a couple of months of burning, you'll know how the damper should be positioned. The warmer the chimney gets, the greater the draft in it. Also check if there should/ought to be some form of outdoor air with a pipe under the insert. Some do that, others don't.
Good luck with the build

 

[JoakimB81]

Good, then you can adjust the draft in the pipe, and after perhaps a couple of months of burning, you will know how the damper should be positioned. The warmer the chimney gets, the greater the draft in it. Also, check if there should be some form of outside air with a pipe under the insert. Some do this, others do not.
Good luck with the construction

Thanks for your responses.