Nilfisk 3707 Manuel D'instructions page 29

Hepa/Ulpa filter replacement
Version for dust that is hazardous for the health: Class H.
ATTENTION DANGER!
Take care not to raise the 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 laws in force.
Replacing the upstream Hepa filter
– Unscrew knob "A" (Fig. 13);
– Remove cover "B" (Fig. 13);
– Release knob filter "C" (Fig. 13), cover the filter "D" with a
plastic bag and remove everything;
–
Seal the bag, fit the new filter and hermetically close the
cover.
Note
If the vacuum cleaner is type B1 for zone 11 (version 1 - BIA):
conduct galvanic continuity tests in accordance with the
accident prevention standards (e.g. VBG4 and according to DIN
VDE 0701 part 1 and part 3).
Standard EN 60335-2-69 prescribes inspections at regular
intervals or after all repairs or modifications).
Inspecting and cleaning the motor cooling fan
Periodically clean the motor cooling fan to prevent the electric
motor from overheating, particularly if the appliance is used in a
dusty place.
Seal inspection
Checking the condition of the hoses
Make sure that connecting hose hoses "A", "B" and "C" (Fig. 14)
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 hose "C" (Fig. 14), in outlet and on the baffle in the
filtering chamber.
Scrape outside the outlet and remove the deposited waste as
indicated in figure 14.
Checking the lid seal
If seal "A" (Fig. 15) under lid "D" has become slack, unscrew
screws "B" that lock fastening latches "C" in place and allow
them to slide downwards until lid "D" closes perfectly.
Now tighten locking screws "B" (Fig. 15).
Replace seal "A" (Fig. 15) if an optimum seal cannot be
obtained.
Checking the tightness of filter chamber
If seal "A" (Fig. 16) between the container and filter chamber "C"
fails to guarantee tightness:
– loosen the four screws "B" (Fig. 16) that lock filter chamber
"C" against vacuum structure.
– Allow filter chamber "C" (Fig. 16) to lower down and relock
screws "B" once it has reached the retention position.
The seal must be replaced if it is torn, cut, etc.
Replace seal "A" (Fig. 16) if the degree of tightness is still not
optimum.
01/2015
3707 - 3907 - 3907 L, M, H - 3907/18 - 3907/18 L, M, H
3707/10 - 3707/10 L, M, H - 3907 W - 3907 W L, M, H
Cleaning and replacing the separator
Note
If there is only a dust deposit on separator "D" (Fig. 17), allow
the dust to drop through the central hole.
Separator "D" (Fig. 17) should first be disassembled in order to
be perfectly cleaned:
– release latches "A" (Fig. 17) that fasten lid "B" and remove
the lid.
– Remove the filter.
– Unscrew the two screws "C" (Fig. 17) and remove
separator from the container.
–
Replace the part if excessively worn.
– Assemble separator "D" (Fig. 17) again.
– Lock it in position by screwing the two screws "C" (Fig. 17).
– Refit the filter and close cover "B" (Fig. 17), locking it in
place with the two fastening latches "A".
Disposal of the machine
Dispose of the machine in compliance with the current laws in
force.
Correct Disposal of This Product (Waste Electrical &
Electronic Equipment) (Applicable in the European Union
and other European countries with separate collection
systems)
This marking shown on the product or its literature, indicates
that it should not be disposed with other household wastes
at the end of its working life. To prevent possible harm to the
environment or human health from uncontrolled waste disposal,
please separate this from other types of wastes and recycle
it responsibly to promote the sustainable reuse of material
resources.
Household users should contact either the retailer where
they purchased this product, or their local government office,
for details of where and how they can take this item for
environmentally safe recycling.
Business users should contact their supplier and check the
terms and conditions of the purchase contract. This product
should not be mixed with other commercial wastes for disposal.
11
GB
C65