Mandik FDMR Installation Instructions Manual page 31

The damper body must not get deformed during its installation process. Once the damper is built installed, its blade
must not grind on the damper body during its opening or closing.
To provide needed access space to the control device, all the other objects must be situated at least 350 mm away
from the damper control parts. At least one inspection hole must be accessible.
Damper blade overlaps
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