Miele DA 489-4 EXT Operating And Installation Manual - Page 12
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Modes of operation
The cooker hood works with
. . . air extraction:
The air is drawn in through the vapour
plates, cleaned by the grease filter and
directed outside.
If the on-site ventilation system does
not have a non-return flap, then the
non-return flap supplied with the
appliance must be fitted in the exhaust
socket in the motor unit.
Having a non-return flap fitted in the
ducting ensures that air, once ducted
to the outside, cannot get back into the
room again.
The flap is closed when the cooker
hood is switched off.
When the cooker hood is switched on,
the non-return flap opens for the
cooking vapours to be blown directly
outside.
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. . . air recirculation:
(requires a conversion kit and charcoal
filter: see "Technical Data")
The air is drawn in and cleaned first by
the vapour plates and the grease filter,
and then by a charcoal filter. The
cleaned air is then recirculated back
into the kitchen through grilles in the
top of the cooker hood extension piece.
Charcoal filters are available to order
through your Dealer/Chartered Agent or
the Miele Spare Parts Department. (See
back cover for contact details and
"Technical Data" for model number).
Before using the cooker hood in
recirculation mode, ensure that the
charcoal filter is in place. See
"Cleaning and care".
. . . an external motor:
(...EXT models only)
...EXT models are designed to be
connected to an external motor located
outside the room.
The external motor is connected to the
cooker hood by means of a control
cable, and is operated by the controls
on the cooker hood.