Gazco E -Box removal

Can anyone advise please?

I’ve bought a house that has a Gazco fire installed.
The gas supply has been removed and capped. The meter has been removed.

I would like to remove the fire carefully to sell on.

I have the installation manual which I am reading etc.

If I read it correctly the front will come off, remove the internal coals etc
Remove the fire clay panels

The manual mentions fixing screws, which I will remove.

The flue exits through the wall of the building.

Does the flue separate from the main fire when attempting to pull it from the recess?
Or does the flue need to pass through the outside wall back through the recess complete with fire?

Thanks in advance

Cheers

Forget it...no gas installer in their right mind would install a second hand gas fire.

Still has to come out in one piece so I can decorate etc
But thanks for reply

You will be able to download the instructions but as far as selling on you have no idea of its history and my be defective

I’ve got installation instructions
Haven’t seen removal instructions

I’ve just reversed procedures

Should have said that prior to meter removal fire was on a regular service contract with local company