Operation Manual

USER MANUAL
32401131(1)2005-03 A 11
11 Using the vacuum cleaner in
environments with purified air
When the vacuum cleaner is used in environments with
purified air, where a high level of air purity is required,
or when it must be used for handling materials which
are hazardous for the health of the operator, it must
always be equipped with a HEPA filter.
This filter is located between the main filter and the
motor head. This enables the vacuum cleaner to reach
a MPP filtering efficiency of 99,995%, with particles
measuring up to 0,3 Micron. In this way it is possible to
retain the particles that are not retained by the main
filter.
This value has been measured according to the D.O.P.
method.
11.1 HEPA exhaust filter (IVT versions
only)
IVT 2000/3000 series models are equipped with an H
13 HEPA exhaust filter. When this filter is installed, the
vacuum cleaners can be used in environments with
purified air. The vacuum cleaner user is responsible for
checking that the vacuum cleaner is suitable to clean
the environment with purified air.
12 Dust class
The vacuum cleaner must be used according to the
safety standards.
Check for which dust class the vacuum cleaner is
suitable to work with (see the identification plate).
The vacuum cleaner cannot be used at the same time
for different dust classes.
12.1 Dust class “L”
(Low risk - established according to standard EN
60335-2-69).
This type of industrial vacuum cleaner is approved
according to the EN 60335-2-69 regulation for dust
class “L” and is suitable for collecting dry,
nonflammable and non-toxic dust with MAK values
above 1mg/m
3
. The purified air is then conveyed back
into the working area.
12.2 Dust class “M”
(Medium risk - established according to standard EN
60335-2-69).
This type of industrial vacuum cleaner is approved
according to the EN 60335-2-69 regulation for dust
class “M” and is suitable for collecting dry,
nonflammable and non-toxic dust with MAK values
above 0,1 mg/m
3
.
The purified air is then conveyed back into the working
area.
12.3 Dust class “H”
(High risk - established according to standard EN
60335-2-69).
This type of industrial vacuum cleaner is approved
according to the EN 60335-2-69 regulation for dust
class “H” and is suitable for collecting toxic, dry and
nonflammable dust with any MAK values, and for dry,
non-flammable, carcinogenic dust. The purified air is
then conveyed back into the working area.