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3.5
Commissioning
Prior to initial commissioning (or to com-
missioning after maintenance work) fill the
installed device with water and vent:
1.
Open the upstream shut-off valve to
fill the device with water. The device is
now under mains pressure.
2.
Attention: Carry out a backwashing
immediately so that the trapped air can
escape (see chapter 4.1.2)! This pre-
vents damage to the installation by
water hammer pressure surges.
After backwashing, the device is vented
and ready for operation.
4
Operation
4.1
Cleaning of the sieve insert
(backwashing)
A regular cleaning process is necessary to
remove the residues from the sieve fabric
of the device. This process is called back-
washing.
Suction pipes are provided for backwash-
ing, which rotate around the sieve fabric
of the fine filter. The backwashing valve
opens on the bottom side of the device. By
reversing the water flow from inside to out-
side, deposits on the sieve fabric are car-
ried away and rinsed out with the back-
12
Installation
wash water. The suction pipes also clean
the inside of the transparent filter bowl with
wiper lips during their movement.
The degree of contamination and cleaning
process can be observed from the outside.
The device is backwashed with
INFO_NO_HEADER
filtered water. The filtered water
supply of the domestic installation
remains intact during the backwash-
ing process. No dirty water can reach
the pure water side during the back-
washing.
4.1.1 Backwashing interval
If cleaning is not performed soon enough,
the result may be damage to the sieve
insert. Large quantities of filtered particles
can deform the sieve fabric and in extreme
case lead to tearing of the sieve fabric. In
addition, larger deposit quantities can impair
the backwashing function mechanically.
According to DIN EN 13443-1 backwashing
the device is required at the latest every six
months.
The manufacturer recommends a back-
washing:
JUDO JSY-LF
1701428 • 2022/01
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