For Air Extraction Mode - Miele DA 186 Operating And Installation Instructions

Installation
 Refit the grease filters.
30

For air extraction mode

If your ducting system does not have a
non-return flap, two are supplied with
the rangehood. One for  150 mm and
one for  120 mm ducting.
 For  150 mm ducting, fit the non-
return flap into the exhaust
connection.
For  120 mm ducting, fit the
reducing collar supplied onto the
exhaust connection and then fit the
appropriate non-return flap onto the
reducing collar.
 Secure the exhaust ducting to the
exhaust connection, e.g. with a hose
clip (available as an optional
accessory) on flexible ducting.
 See "Connection for air extraction"
for further instructions on fitting the
ducting.