Nilfisk-cfm 3308 Manuel D'instructions page 27

Vacuum cleaner operation
Figure 9
1 Red zone
2
Vacuum gauge
3 Green zone
Check the flow rate:
■ When the vacuum cleaner is operating, the pointer of the
vacuum gauge (2) must remain in the green zone (OK)
(3) to ensure that the speed of the intake air does not
drop below the safety value of 20 m/sec;
■ If the pointer is in the red zone (STOP) (1) it means
that the speed of the air in the vacuum hose is 20 m/s
and that the vacuum cleaner is not operating in safety
conditions. The filters must be cleaned or replaced.
■ When the vacuum hose is closed, the pointer of the
vacuum gauge must switch from the green zone (OK) (3)
to the red zone (STOP) (1).
WARNING!
If the vacuum cleaner is class M or H version, use only
hoses with diameters that comply with the indications
in the technical specifications table in order to prevent
the air speed from dropping below 20 m/sec.
WARNING!
When the vacuum cleaner is operating, always check
that the vacuum gauge pointer remains in the green
zone (OK).
Consult the "Troubleshooting" chapter if faults occur.
WARNING!
Class H - Asbestos variant:
■ This variant has a 70 mm diameter exhaust port
where the exhaust hose is connected.
Only D = 70 mm is tolerated.
Only an exhaust hose with D = 70 mm and L < 5 m
can be used.
Contact the manufacturer to obtain the asbestos
conversion kit.
■ Shut the inlet with an appropriate plug when
transporting the vacuum cleaner.
■ Comply with all other prescriptions for class H
vacuum cleaners.
09/2014
All manuals and user guides at all-guides.com
Shaking the main filter
Depending on the quantity of dust cleaned up, shake the
main filter by means of the lever (1, Fig. 10) when the vacuum
gauge pointer (2, Fig. 9) switches from the green zone (OK) to
the red zone (STOP).
Stop the vacuum cleaner before shaking the filter.
Do not shake the filter while the vacuum cleaner is on,
as this could damage the filter itself.
Wait before restarting the vacuum cleaner, to allow the dust to
settle.
Replace the filter element if the pointer still remains in the red
zone (STOP) even after the filter has been shaken (consult
the "Main filter replacement" paragraph).
Emergency stopping
Turn the main switch to "0" position.
Emptying the container
■
■
Before emptying the container it is advisable to clean the filter
(see "Shaking the main filter" paragraph).
■ Normal version, not suitable for treating hazardous dust
▪
▪
▪
Plastic bag
A plastic bag can be used to collect dust (see Fig. 11).
In this case, the vacuum cleaner must be equipped with
optional accessories [depressor (3) and grid (2), Fig. 11].
9
WARNING!
WARNING!
Turn off the vacuum cleaner and remove the plug
from the power socket before proceeding with
this operation.
Check the class of the vacuum cleaner.
Release the container (1, Fig. 11), then remove and
empty it.
Make sure that the gasket is in perfect condition and
correctly positioned.
Place the container back in position and use the lever
to secure it again.
3308 / 3508 / 3558
GB
C67