20
JUDO PROFIMAT-PLUS
Operation
5.6
Backwashing
The filter must be backwashed (= cleaned)
at the specified cycles in order to remove the
filtered dirt from the fine filter screen.
The cleaning-off is effected by means of the
point-rotation method:
Spiralled rotation of suction trunks around
the sieve cloth of the fine filter. These
progress upwards with each turn till the
entire sieve cloth will have been sucked off
once.
At the same time, the flushing valve at the
bottom of the filter opens and the backwash
water can exit. During this time, pure water
streams inside-outside passing through the
sieve surface into the suction trunks,
carrying away the adhering particles.
After reaching the upper limit-stop, the
flushing valve is closed again and the sieve
cloth of the fine filter is sucked off a second
time by the suction trunks. Repeat this
performance till reaching the lower limit-
stop. During this step, the suction trunks do
not only clean the sieve cloth of the fine filter
but also the transparent filter hood by means
of a rubber lip on its exterior (see fig. 10).
5.6.1 Backwashing interval
Unauthorized persons must not operate the
filter! Persons who operate the filter must
observe the operating instructions. Failure
to observe these instructions can result in
damage to property and personal injuries.
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The smaller the mesh size of the screen
insert the more frequently backwashing has
to be carried out!
Experience shows that increased dirt is
deposited during the initial running period. If
so, the unit has to be flushed more often
than usual.
Failure to flush in good time can cause
damage to the screen. Larger quantities of
filtered particles can deform the screen and
as an extreme incident cause the tearing of
the sieve. As a result a filter function is not
any longer ensured. In addition, larger quan-
tities of dirt can cause mechanical impair-
ment concerning the backwashing function.
All filter sizes are backwashed with
treated water. The treated water
supply within the domestic installa-
tion is maintained throughout the
backwashing performance. During
the backwashing any wastewater
can't get into the pure water side.
The degree of pollution as well
as the cleaning off operation can
be watched from outside.
