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7 Mounting preparations
7.3 Duct
1. Deburr edges on the inside of the duct.
2. Perform installation preparations as described
in Chapter Wall [} 19].
7.4 External cover
1. Unpack the external shutter with external com-
bination sensor and remove the outer piece.
To release the outer piece's locking hook, un-
lock (→ arrow) using a screwdriver.
Do not disconnect the sensor connection
cable from the external combination
sensor. It is connected to the fan, through
the duct, while the housing is mounted.
2. Fit supplied sealing strip centred in socket.
20
7.5 Fan
1. Unpack unit and take off cover.
2. To release the cover's locking hook, unlock
using a screwdriver.
3. Remove the internal combination sensor.
6 Internal combination sensor
7 Electronics cover
4. Remove the electronics cover. Unlock locking
hook (→ arrow) with screwdriver.
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