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© Airflow • We reserve the right to make changes without prior notice
MAINTENANCE
MAINTENANCE
To change the filters:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Open the upper door of the unit.
3. Remove the old filters (A, B, C) and discard them.
4. Install the new filters (A, B, C).
5. Close the door of the unit. Ensure that the safety switch
of the door is engaged, allowing the unit to be turned on.
6. Plug the ventilation unit back into the mains.
7. The filters have now been successfully changed.
HEAT RECOVERY CELLS
Check that the heat recovery cells are clean every two years, or
whenever the filters are being changed.
NOTE
If the unit has an enthalpy cell, it must not be washed. Only
aluminium or plastic cells can be washed.
To check and clean the heat recovery cell:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Open the doors of the unit.
3. Remove the filters (A, B, C).
4. Remove the support grid of the filters.
5. Disengage the upper support strip (D) of the cell.
6. Lift and pull the cell (E) out of the unit.
7. If the cell is dirty, clean it by immersing it in warm water, to
which a small amount of a mild detergent has been added.
8. Rinse the cell clean with water spray. Do not use a high-
pressure cleaner.
9. When all the water has drained from between the plates,
reassemble the ventilation unit in the reverse order.
10. Close the doors and plug the unit back into the mains.
11. The heat recovery cell has now been checked and cleaned.
WARNING
Handle the cells carefully! Do not
lift the cells by the plates, as the
cell plates are very fragile.
D
A
B
C
E
DV245
(Integral CO
2
Sensor)
