Judo PROFIMAT JPF-A Series Installation And Operating Instructions Manual page 16

CAUTION
Escaping water!
Before connecting to the power
supply system, make sure that the
waste water connection is func-
tional.
4. Start the backwashing process manu-
ally: Press manual button: The back-
washing interval is reset.
After the backwashing process, the set-
ting of the new backwashing interval is
completed.
5.2.3 Start backwashing
Backwashing is triggered in the following
manner:
• automatically, after the set backwashing
interval has elapsed.
• automatically once the set differential
pressure is reached.
•
by pressing the
5.2.5).
• after short-circuiting the "external back-
wash start" contacts (only "floating" ver-
sion).
5.2.4 Backwashing via differential
pressure control (ATP version
only)
Mode of operation of the differential
pressure switch
The impurities filtered off on the filter fab-
ric cause an increased differential pressure
16
Operation
key (see chapter
JUDO JPF-A
between the inlet and outlet of the unit with
an appropriate flow rate. The differential
pressure switch registers the differential
pressure applied to the filter. When the dif-
ferential pressure reaches the set value, the
backwashing process is triggered automati-
cally.
The differential pressure switch is flanged
directly to the device via the intermediate
flange.
Setting the differential pressure
The switching values of the differential
pressure switch are adjusted on the adjust-
ing screw. Set this using a screwdriver to a
value between 0.9 psi (6.2 kPa) and 9 psi
(62 kPa) according to the chart. The ex-
works setting is 2.9 psi (recommended set-
ting value 2.9 to 5.8 psi). The differential
pressure at the filter depends on the water
flow rate and the degree of contamination.
If the value is set too high, too much dirt
can accumulate at low flow rates. With
higher water withdrawal, the differential
pressure can then become so high for a
short time that damage can occur to the
sieve.
If the value is set too low, backwashing
is unnecessarily frequent, which leads to
increased wear and backwashing water
consumption.
1701649 • 2019/04