Upstream Absolute Filter Replacement (Optional) Only Vhw321 - Vhw421 Models; Downstream Absolute Filter Replacement; Motor Cooling Fan Inspection And Cleaning; Hose And Inlet Inspection - Nilfisk cfm VHW320 Manuel D'instructions

VHW320 - VHW321 - VHW420 - VHW421 - VHW440
Upstream absolute filter replacement
(optional) only VHW321 - VHW421 models
Take care not to raise
is carried out. Wear an N100 (P3) mask and other
protective clothing plus protective gloves (PPE / DPI)
suited to the hazardous nature of the dust collected;
refer to the laws in force.
Do not use the absolute (HEPA) filter again after
having removed it from the vacuum cleaner.
1. Knob
2. Arm
3.
Knob
4. Cover
5. Absolute filter (HEPA)
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 ANSI/ISEA Level "2" protection.
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)
counterclockwise to remove the cover (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 into the bag (7)-(A, fig.15).
■ Close the bag with the relevant clamps and cut (B, fig.15).
■ Insert the new absolute filter (5) inside the new bag (7)
with the flange first.
■ Fasten the new bag (7) to the cover(4) with the new ring
(6) for bag (C fig.15)
■ Remove the old ring for bag (6) with the bag (7) from the
cover (4) and let it drop to the filter flange.
US
■ Overturn the absolute filter (5) inside the bag (7) in order
to move to the bottom part of the bag the end part of the
old bag and the corresponding rubber ring (D, fig.15).
■ Lift the absolute filter (5) from the bottom of the bag and
place it inside the cover (4), then slightly tighten the knob
(3) so that the absolute filter (5) is supported (D, fig.15).
■ 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 cover (4) in the machine, then lock the arm
(2) with the knob (1).
C394
WARNING!
dust when this operation
WARNING!
Figure 15
WARNING!
Downstream absolute
Take care not to raise dust when this operation
is carried out. Wear an N100 (P3) mask and other
protective clothing plus protective gloves (PPE / DPI)
suited to the hazardous nature of the dust
refer to the laws in force.
Do not use the absolute filter again after having
removed it from the vacuum cleaner.
1. Knob
2. Cover
3.
Absolute filter (HEPA)
Reassemble with care to avoid trapping your hands
between the vacuum unit and the container. Use
gloves that provide ANSI/ISEA Level "2" protection.
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.

Hose and Inlet 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 collected, check for possible
clogging along the hose, in the inlet and on the deflector
inside the filtering chamber.
Scrape the inlet (1) from the outside and remove the
deposited waste as indicated in the figure.
12
filter replacement
WARNING!
collected;
WARNING!
Figure 16
WARNING!
Figure 17
10/2013