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MAINTENANCE
CLEANING THE FANS
Check the cleanliness of the fans when servicing the filters and
the heat recovery cell. Clean the fans as required.
You can clean the fan blades with compressed air (wear
protective goggles) or by brushing them gently. Do not remove
or move the fan blade balancing weights.
To clean the fan:
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 filters (A) and the extract air filter
and turn the upper support of the cell (B) anti-clockwise
against the ceiling. See chapters “Replacing the filters” and
“Cleaning the heat recovery cell”.
5. Remove the support plate (F) by undoing the screws (E).
6. Push the wires of the fan and the rubber feedthrough (K/L)
through the intermediate floor and to the bottom part of the
unit.
7. Remove the plastic screws used to fasten the fans (I) (2 per
fan). Remove the wing screws (J) (2 pcs) of the post-heating
resistor (only when changing the supply air fan) and remove
the cable of the resistor (G) from the connector.
8. Remove the fan from the unit by lowering it before turning
the fan anti-clockwise, whilst tilting it. Remove the control
grille by undoing the screws (4 pcs).
9. You can now clean the fan. Put the control grille (S) back in
place after cleaning.
10. Reassemble in reverse order after cleaning. Once the fan
has been installed, ensure that the rubber feedthroughs (M,
K, L) are in place.
11. Close the door. Ensure that the safety switch catch of the
door is touching the safety switch.
12. Plug the ventilation unit back into the mains.
The fan has now been checked and cleaned.
If the power cord is damaged, the manufacturer, its service
representative or other person with similar qualifications must
replace it to avoid danger.
B
A
D
C
I
Summary of Contents for 3756
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