Vallox D3741, Manual

Page: 12 / 24

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 sealing strip (E) above the HR cell in the
direction of the arrow.
5. Remove the extract air filter (C).
6. Lift and pull the HR cell (D) 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 a water spray. Do not use a high-
pressure cleaner.
9. When all the water has drained from between the layers,
reassemble the ventilation unit as follows:
10. Ensure that the lower support (F) is in place between the
knobs at the bottom of the unit.
11. Push the heat recovery cell in place.
12. Push the sealing strip (E) in place so that the strip is
supported by the corner bracket (G) at the rear.
13. Install the extract air filter (C) in place.
14. Close the door. Ensure that the safety switch catch of the
door is touching the safety switch.
15. 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
G
E
F