Miele DA 390-6 Operating Instructions Manual page 34

Installation
A non-return flap is supplied with the
rangehood or is already fitted in the
exhaust socket (depending on
rangehood version).
 With extraction mode / external motor
(AL, EXT) fit the non-return flap in the
exhaust socket if your ducting
system is not equipped with one.
Recirculation mode (UL) does not
require the non-return flap to be
fitted. If there is one present, it should
be removed.
34
 Hang the rangehood canopy on the
tower by pushing the canopy up into
the installation frame and pressing
the retaining clips into the openings
as shown. Ensure the controls are at
the front.
 Secure the rangehood with the
screws supplied.