MANN+HUMMEL Industrial Filters
6
NLG
5.2 Maintaining the main element
Only carry out maintenance on the
main element when the maintenance
indicator/switch has triggered or after
2 years at the latest and in accordance
with the instructions from the device or
motor manufacturer.
5.2.1 Removing the main element
– Release wire clamp latches and remove
lower housing section (see Fig. 1).
Figure 1: Removing lower housing section
– Pull main element downwards, turning
slightly and remove completely from the
inner seat (see Fig. 2).
Figure 2: Removing the main element
Carefully wipe the inside of housing
with a damp cloth. Make sure that dust
or dirt does not reach the clean-air end
of the filter.
5.2.2 Cleaning the main element
Never wash, brush or knock the main
element. Only blow it out in cases of
emergency. However, no dust may
touch the inner side of the main ele-
ment.
In cases of emergency, the main ele-
ment can be cleaned as described
below. Because minimal damage is
often very difficult to detect or cannot
be detected at all, we always recom-
mend using new elements to protect
the motor or equipment. We cannot
warranty cleaned elements.
– To clean the main element, fit a tube to a
compressed-air gun the end of which is
bent to approx. 90°. The tube must be long
enough to reach the bottom of the main ele-
ment. Carefully blow out the main element
with dry compressed air (maximum 5 bar)
by moving the tube up and down inside the
main element until dust no longer escapes
(see Fig. 3).
The tip of the tube may not come into
contact with the filter paper.
Figure 3: Cleaning the main element
