Installation
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 4.2.3)! This pre-
vents damage to the installation by
water hammer pressure surges.
After backwashing, the device is vented
and ready for operation.
3.5.1 Insert batteries
The backwash reminder alarm requires two
1,5 V Micro batteries.
How to insert the supplied batteries:
1.
Lift the handwheel lid.
2.
Insert the two batteries into the battery
compartment.
3.
Replace the handwheel lid.
4.
Test the functionality of the batteries py
pressing the Reset-button:
°
clearly audible beep: batteries are
powerful.
°
no beep or only weakly audible:
capacity of the batteries exhausted
or insufficient.
4
Operation
4.1
Setting the downstream pres-
sure
To compensate for pressure fluctuations
and to protect the downstream installation,
the downstream pressure can be regulated
via the pressure reducer. The factory pre-
set downstream pressure of 4 bar can be
changed to a value between 1.5 bar and
6 bar depending on the upstream pressure:
1.
Undo the countersunk screw on the
handwheel of the pressure reducer.
2.
Turn the handwheel clockwise
(= pressure increase), or turn counter-
clockwise (= pressure reduction).
3.
Open a drawing point behind the
device for a short time. This results
in a pressure relief and the set down-
stream pressure can be read off from
the downstream pressure gauge.
4.
When the desired downstream pres-
sure has been reached, retighten the
countersunk screw on the pressure
reducer handwheel to prevent auto-
matic adjustment of the downstream
pressure.
4.2
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
outside, deposits on the sieve fabric are
carried away and rinsed out with the back-
wash water. The suction pipes also clean
the inside of the transparent filter bowl with
wiper lips during their movement.
1702272 • 2020/07
JUDO JPM+
11
