Upstream Absolute Filter Replacement; Downstream Absolute Filter Replacement; Motor Cooling Fan Inspection And Cleaning; Tightness Inspection - Nilfisk VHW320 Manual De Instrucciones

VHW320 - VHW321 - VHW420 - VHW421 - VHW440

Upstream absolute filter replacement

Take care not to raise dust when this operation is
carried out. Wear a P3 mask and other protective
clothing plus protective gloves (DPI) suited to the
hazardous nature of the dust collected, refer to the
laws in force.
Do not use the absolute filter again after having
removed it from the vacuum cleaner.
1.
Knob
2. Arm
3. Knob
4. Container
5.
Absolute filter
6. Ring for bag
7. Bag for filter
Reassemble with care to avoid trapping your hands
between the vacuum unit and the container. Use
gloves that provide protection against mechanical
risks (EN 388) with a level of protection CAT. II.
Before proceeding with these operations, turn the vacuum
cleaner off and disconnect the plug from the power socket.
■ Loosen the knob (1) and turn the arm (2) counter-
clockwise to remove the container (4) from the machine
and lock it by tightening the knob (1).
■ Loosen the knob (3) to release the absolute filter (5).
■ Let the absolute filter drop on the bottom of the bag (7).
■ Close the bag with the relevant clamps and cut.
■ Insert the new absolute filter (5) inside the new bag (7)
with the flange looking upwards.
■ Fasten the new bag (7) to the container (4) with the new
ring for bag (6).
■ Remove the old ring for bag (6) with the bag (7) from the
container (4) and move it to the filter flange.
■ Overturn the absolute filter (5) inside the bag (7) in order
GB
to move to the bottom part of the bag the end part of the
old bag and the corresponding rubber ring.
■ Lift the absolute filter (5) from the bottom of the bag and
place it inside the container (4) then slightly tighten the
knob (3) so that the absolute filter (5) is supported.
■ Roll up the bag (7) in order to remove the air inside;
it must be as flat as possible under the absolute filter
flange (5).
■ Fasten the absolute filter (5) by tightening the knob (3).
■ Loosen the knob (1), turn the arm (2) clockwise in order
to insert the container (4) in the machine, then lock the
arm (2) with the knob (1).
C393
WARNING!
WARNING!
Figure 18
WARNING!

Downstream absolute filter replacement

Take care not to raise dust when this operation is
carried out. Wear a P3 mask and other protective
clothing plus protective gloves (DPI) suited to the
hazardous nature of the dust collected, refer to the
laws in force.
Do not use the absolute filter again after having
removed it from the vacuum cleaner.
1.
Knob
2. Container
3. Absolute filter
Reassemble with care to avoid trapping your hands
between the vacuum unit and the container. Use
gloves that provide protection against mechanical
risks (EN 388) with a level of protection CAT. II.
Before proceeding with these operations, turn the vacuum
cleaner off and disconnect the plug from the power socket.
■ Unscrew the knob (1), and remove the cover (2).
■ Remove the absolute filter (3) and place it in a plastic
bag, close the bag hermetically and dispose of the filter
in accordance to the laws in force.
■ Insert a new absolute filter (3) with the same filtering
characteristics as the removed one.
■ Reinstall the cover (2) by fastening it with the knob (1).

Motor cooling fan inspection and cleaning

Periodically clean the motor cooling fan to prevent the motor
from overheating, especially if the device is used in a dusty
place.

Tightness inspection

Hoses check
Make sure that connecting hoses are in a good condition and
correctly fixed.
If the hoses are damaged, broken or badly connected to the
unions, they must be replaced.
When sticky materials are treated, check for possible clogging
along the hose, in the inlet and on the baffle plate inside the
filtering chamber.
Scrape the inlet (1) from the outside and remove the
deposited waste as indicated in the figure.
14
WARNING!
WARNING!
Figure 19
WARNING!
Figure 20
03/2017