Fi
g.
24
Loosening/
ti ghtening the filter block
Fig.
25
In
serting
th
e
filter
bl
ock
into
the
Jilter
changing device.
Th
e
block
When
inserti
ng t
he ch
an
gi
ng u
n
it in
to
the
housing,
it must
be
e
ns
ured
engrav
in
g
(1)
mus
t
be on
the
sam
e
sid
e
Cl5
the
m
ar kin
g
(2).
Iha
t
the
two
dOl
s (arrows
) m
e in
lin
e.
I·
21