Automatic Backflush Filter F450
State:
05.02.2016
– 1.3
Georg Schünemann GmbH, Bremen
4-6
4.5
Setting into operation
Start up the electronic control by switching on the main switch (see chapter 9
“Illustrations”, Fig. 9-2 resp. Fig. 9-4) at the control unit.
After switching on the control unit the piston drives to the upper end position and
the filtration can be started also at any time by pressing the key Spülen/Flush.
Check whether the flushing valve opens and the piston carries out thereafter two
strokes (pre and decreasing/going back movement). The test of the piston func-
tion should be accomplished under operating conditions, because a high system
pressure and flow impair the time which is used for a full piston stroke
Function check of the differential pressure switch
Check the function of the differential pressure switch by opening the connection
at the filter housing (connection with return valve or rather ball cock valve) at the
low pressure side (connection with marking B) during the filter operation. The
flushing cycle must be activated. If not, the cause is to be due to an incorrect
connection of the lines between filter and differential pressure switch. Therefore it
has to be checked whether the connection was made in accordance with the
connection diagram in this manual.
The same must be pointed out with a differential pressure transmitter for record-
ing the differential pressure.
It is to be considered, that the pressure difference of 145 psi (10 kg/cm
2
g) does
not arise. Otherwise the membrane of the differential pressure switch can be
damaged.