12
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.
To check and clean the heat recovery cell:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Open the door of the Vallox ventilation unit by undoing the
finger screws.
3. Lift the door off.
CAUTION
The door is heavy.
4. Remove the supply air filter (A).
5. Turn the upper support of the cell (B) to the upper position
(anti-clockwise).
6. Remove the extract air filter (C).
7. Lift and pull the HR cell (D) out of the unit.
8. 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.
9. Rinse the cell clean with a water spray. Do not use a high-
pressure cleaner.
10. When all the water has drained from between the layers,
reassemble the ventilation unit as follows:
11. Ensure that the lower support (E) is in place against the
knobs at the bottom of the unit.
12. Lift the HR cell in place.
13. Turn the upper support against the cell. Ensure that the
upper support is properly nestled against the cell (remains
upright).
14. Install the extract air filter (C) and the supply air filters (A) in
place.
15. Close the door. Ensure that the safety switch catch of the
door is touching the safety switch.
16. Plug the ventilation unit back into the mains.
The heat recovery cell has now been checked and
cleaned.
MAINTENANCE
IMPORTANT
Handle the cell
carefully! For example,
do not lift the cell by the
layers. The cell layers
are very thin and easily
damaged.
CONDENSING WATER
In the heating season, the extract air humidity condenses to
water. In new buildings, the volume of condensing water can be
high. 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
C
B
A
E
