75
Cleaning the filters and replacing if required
Note
Prior to removing filters, note their installation position.
If necessary, mark positions with a pen.
Fig. 61
A
Extract air filter
B
Outdoor air filter
Replacing filters in the extract air valves
!
Please note
Dust will settle inside the ductwork if the
mechanical ventilation system is operated with-
out filters. This increases the air pressure drop.
Turn the ON/OFF switch of the ventilation unit
OFF before undoing the extract air valves.
Maintenance
Cleaning or replacing filters (cont.)
5790940