Heta Vista Operating And Installation Instructions page 23

7
Tighten the flex pipe around the ø100 mm pipe
on the fresh air connector. Lower it into place
and fasten.
9
Tighten screws, bushing and washers.
Check that all parts are seated correctly.
11
Put the cover plate in place before placing the
bottom stones again.
8
Replace the air control arm in the notch.
10
Check that the air control moves freely.
23