Vallox A3712-1, Manual

Page: 16 / 32

16
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.
Cleaning the supply air fan
To clean the supply air fan:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Lift the latch to open the door of the Vallox ventilation unit.
3. Lift the door off.
CAUTION
The door is heavy.
4. Remove the extract air filter (C), the cell top bracket (E) and the
heat recovery cell (D). See chapters “Replacing the filters” and
“Cleaning the heat recovery cell”.
5. Pull out the temperature sensor (figure 1) located at the top
of the extract air duct (G). Remove the stopper screw (I) at the
bottom of the duct. The extract air duct now comes out by
turning and pushing it downwards simultaneously (figure 2).
6. Remove the temperature sensor from the resistor support
(figure 4).
7. Remove the additional and post-heating resistor support,
which is attached by two wing nuts (Vallox 110 MV and Vallox
145 MV) or screws (Vallox 096 MV) from below (figure 5).
MAINTENANCE
IMPORTANT
The fans are
extremely sensitive
to external shocks. It
is recommended that
the fans be cleaned
in place, i.e. without
attempting to remove
them.
Handle the fan blades
carefully. Do not
remove or move the
fan blade balancing
weights.
1 1
det
3 2
4 5 6 7