7
© Airflow • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
MAINTENANCE
Before starting maintenance operations
When you open the DUPLEXVENT DV145SE unit, the security switch (S)
turns voltage off. In spite of this, disconnect the plug of the unit.
Disconnect the plug of the DUPLEXVENT DV145SE unit before
starting maintenanceoperations.
Filters
When the maintenance reminder gives an alarm, the cleanliness of
the fi lters must be checked. Outdoor air is fi ltered in the unit with two
kinds of fi lters. A coarse fi lter (A) fi lters off insects, heavy pollen and
other dust. An F7 class fi ne fi lter (B) fi lters off fi ne dust invisible to the
eye. Extract air is fi ltered with a coarse fi lter (C).
By using original Airflow filters you ensure good operation of the
ventilation unit and the best fi ltering result. The replacement interval
of fi lters depends on dust content in ambient air. It is recommended to
replace fans in spring and autumn, but at least once a year.
MAINTENANCE INSTRUCTIONS
Filters
Heat recovery cell
Heat recovery cell
When you replace the fi lters, you are also advised to check the
cleanliness of the heat recovery (HR) cell (D) at an interval of
approximately every two years. The sealing ledge (E) above the
HR cell must be pulled off in the direction shown by the arrow in the
fi gure. When the sealing ledge has been removed, the HR cell can
be pulled out of the unit. Note! The laminas of the HR cell are very
thin and get easily damaged.
If the HR cell is dirty, wash it by putting it in a solution of water with
washing-up liquid. Rinse the HR cell clean with a jet of water. When
water has drained from between the laminas, you can push the HR
cell back in place. Finally, push the sealing ledge in place.
S
A
B
C
D
C
E
D
DV145SE
