35
11. MAINTENANCE USERS
11.1. CHANGING FILTERS
NOTE
The following representations of the ventilation sys-
tem are schematic diagrams. The device is mounted
permanently on the ceiling for all maintenance tas-
ks. The installation position shown is not possible.
The period between fi lter replacements depends on the
degree of pollution of the air (e.g., pollen count, cons-
truction site activity, fi ne dust pollution).
The period between fi lter replacements is set to 12 mon-
ths at the factory. This interval can be reduced or increa-
sed depending on air pollution, see page 25.
After expiry of the period set, the fi lter alarm on the con-
trol panel lights up, see page 31. The fi lter must be
changed within 60 days, and the fi lter alarm must be re-
set. If this does not happen, then the device switches it-
self off. The fi lters must be changed, and the fi lter alarm
must be reset, see page 31.
The air lines should be checked and cleaned if needed
every 5-10 years.
AIRFLOW
AIRFLOW
61
3
61
11
1
2
1
2
1. Remove covers (61) (Arrow 1).
2. Remove used extract air fi lter (3) and used outdoor air
fi lter (11) and dispose of them (Arrow 2).
3. Insert new fi lters. The printed arrows must be turned
to the middle of the casing.
NOTE
The following representations of the ventilation sys-
tem are schematic diagrams. The device is mounted
permanently on the ceiling for all maintenance tas-
ks. The installation position shown is not possible.
4. Reset fi lter alarm, see page 31.
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