Superabrasive
Owner’s manual original language – Lavina
®
V20E
01/2020
15
7.2 MAIN FILTER CLEANING
The Lavina V20E uses jet pulse manual filter cleaning. One cycle of filter cleaning
takes 10 to 20 seconds, depending on the vacuum’s operator. The filter must be
cleaned as the vacuum gauge goes to red or if there’s low suction. If the suction
performance is still not improved after a cleaning cycle is applied, the filter must be
replaced with new one.
In fig. 7.2 you have the vacuum’s working position (valves 1 and 2 are opened and 3 stays closed). To
clean the main filter, follow the steps below in the exact order:
1
st
. Close the valve 2. This prevents the turbine to suck air through the filter chamber, which
immediately frees the dust in there, causing it to fall into the longopack plastic bag. This step is very
important and should not be skipped as it drastically helps in the subsequent filter cleaning.
2
nd
. After discharging the filter chamber, reopen the valve 2 and close the valve 1. This creates a
vacuum in the filter chamber, indicated by the pressure gauge (fig. 3.1) as it goes to red (-0.2 to -0.24
bar).
3
rd
. With the filter chamber under vacuum, open and close the valve 3 -
3 to 5
times to clean the
filter. Allow
1-2
seconds between each valve opening to build up vacuum in the chamber again. This
can also be verified via the pressure gauge. Once complete, return to the normal operating position
as shown in figure 7.2.
Figure 7.2
