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DV51 DV51CH
CLEANING THE HEAT RECOVERY
CELL
Check that the heat recovery cell is clean roughly once a year,
or whenever the filters are being replaced. Clean by washing
as required .
IMPORTANT
If the unit has an enthalpy cell, it must not be washed .
Only aluminium or plastic cells can be washed .
Cleaning the heat recovery cell:
1 . Disconnect the ventilation unit from the mains electricity
supply .
2 .
Open the door of the ventilation unit by undoing the finger
screws and by lifting the door off .
CAUTION
The door is heavy .
3 . Pull out the black upper support of the cell (E) located
above the cell .
4 . Lift and pull the cell (D) out of the unit .
IMPORTANT
Handle the cell carefully! Do not lift the cell by the layers .
The cell layers are very thin and easily damaged .
5 . 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 .
6 . Rinse the cell clean with a water spray . Do not use a high-
pressure cleaner .
7 . When all the water has drained from between the layers,
reassemble the ventilation unit in the reverse order .
8 . Close the door .
9 . Plug the ventilation unit back into the mains . The heat
recovery cell has now been cleaned .
MAINTENANCE
CONDENSING WATER
In the heating season, the extract air humidity condenses to
water . In new buildings, condensation discharge can form
rapidly . Condensed water must be able to freely leave the unit .
At some time before the heating season begins (e .g . during
autumn maintenance), check that the siphon or the condensing
water outlet in the bottom pool are not clogged . To check this,
pour some water into the pool . Clean as required .
NOTE
Some condensing
water may have
accumulated in the
bottom pool of the
unit; this is normal and
requires no corrective
action .
WARNING
Water must at all times
be kept out of the
electrical system .
D
E
D
