6
MAINTENANCE
FANS
Check the cleanliness of the fans when servicing the filters
and the heat recovery cell. Clean the fans as required.
The fans are very sensitive to external impacts, and it is
recommended that they be cleaned in place rather than
removing them.
You can clean the fan blades with compressed air or by
brushing them gently. Do not remove or move the fan
blade balancing weights.
Cleaning the fans
• Remove the extract air filter (C), the sealing strip (E),
and the heat recovery cell (D) from the unit following
the instructions provided earlier. The fans can now
be cleaned. The control grille in the suction outlet of
the supply air fan (T) can be removed if it is in the way
during cleaning. To remove the grille, the supply air
fan must first be removed from the unit.
• To remove the fan, disconnect the quick connector
(H) of the supply air fan (T) and/or the extract air fan
(P) cables.
• Push the fan cables and the rubber feed through (I)
into the fan chamber.
• Remove the wing screws used to fasten the fans (J)
(3 screws per fan).
• Remove the fan from the unit by pulling it forward and
by tilting it slightly backwards at the same time.
Removing and mounting the supply air fan
attenuation grid
• Remove the mounting screws (4) of the air flow
control grille of the supply air fan and remove the
grille. You can now clean the fan. Put the control grille
back in place after cleaning.
Mounting the fans
• Ensure that the rubber feed throughs set in place
when reinstalling the fan. Fasten the fan in place with
wing screws (3 screws/fan).
E
C
P
D
S
H
S
K
S
P
H
J
J
I
I
The R model is shown in the figures.
In the L model, the parts are mirrored.
