7 Mounting preparations
NOTICE Danger of short-circuits and damage
to unit if condensation builds up in the fan
housing.
Thermally insulate ventilation ducts properly. Al-
low for a condensation drain or condensate col-
lector in the riser.
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 cli-
mate sensor and remove outer piece. To re-
lease the outer piece's locking hook, unlock
(→ arrow) using a screwdriver.
Do not remove the sensor connection cable
from the external climate sensor. It is con-
nected to the fan, through the duct, when
the housing is mounted.
2. Fit supplied sealing strip centred in socket.
7.5 Fan
1. Unpack unit and take off cover.
20
2. To release the cover's locking hook, unlock
using a screwdriver.
3. Remove internal climate sensor.
6 Internal climate sensor
7 Electronics cover
4. Remove the electronics cover. Unlock locking
hook (→ arrow) with screwdriver.