31
17. Start-up
Prior to start-up, the connection and DIP switch setting must have
been carried out according to sections
Start-up must be carried out by authorized personnel.
Proceed as follows:
1. Check whether the electrodes have been connected according
to the wiring diagram for the actual application.
2. Check that the pump inlets are submerged in the liquid to be
pumped.
3. Set the motor protection relays to the rated current stated on
the nameplates.
4. Warning:
5. Switch on the electricity supply.
Three-phase pumps only:
Check for wrong phase sequence
(the pump cannot be started if the phase sequence is wrong!).
6. Start the pumps, see section
.
7. Check that the pumps are not running dry. The risk of dry run-
ning can be eliminated by a renewed time setting by means of
the DIP switch (stop delay) according to section
or
16.2 and/or
by moving/shortening the electrodes.
8.
Three-phase pumps only:
Check whether the direction of
rotation of the pumps is correct according to the installation
and operating instructions for the pumps in question.
9. Select the required operating mode by means of the ON-OFF-
AUTO selector switch, see section
,
or
18. Maintenance
During normal application and operation, the LCD 110 controller
is maintenance-free.
However, it is advisable to carry out minor checks of the LCD 110
controller, pump pits, tanks, pumps, etc. at suitable intervals.
These checks should be carried out by authorized personnel.
•
Check the gaskets of the LCD 110 cabinet front and those of
the Pg cable entries.
•
Check for possible deposits/sludge build-up in the pump pit/
tank. Sludge may settle in areas with almost stagnant liquid.
•
Check for beginning sludge build-up around the electrodes.
•
Check for possible blockage on the suction side of the pump.
A blockage will typically be a large solid object.
•
If the LCD 110 has been installed in a particularly aggressive
environment, it is advisable to check the motor protection con-
tacts in order to identify possible chemical attack resulting in
corrosion. In typical installations, the motor protection contacts
will work for several years and do not require any inspection.
Note:
The list above is
not
complete. The LCD 110 may be
installed in systems, installations and/or environments which
require thorough and regular maintenance.
19. Technical data – LCD 110
Voltage variants, nominal voltages
•
1 x 230 V.
•
3 x 400 V.
Voltage tolerances
–15%/+10% of nominal voltage.
See also installation and operating instructions for the pump in
question.
Mains frequency
50/60 Hz.
See also installation and operating instructions for the pump in
question.
Supply system earthing
For TN systems and TT systems.
Rated insulation voltage, U
i
4 kV.
Rated impulse withstand voltage, U
imp
4 kV.
Back-up fuse
Depending on variant, see nameplate.
Control circuit fuse
Fine-wire fuse: 250 mA / F / 32 mm x ø6 mm.
Ambient temperature
•
During operation: –30 to +50 °C
(must not be exposed to direct sunlight).
•
In stock: –30 to +60 °C.
Enclosure class
IP 65.
EMC (electromagnetic compatibility)
According to EN 61 000-6-2 and EN 61 000-6-3.
LCD 110 cabinet
•
External dimensions:
Height = 410 mm, width = 278 mm, depth = 150 mm.
•
Material: Technopolymer and polycarbonate.
•
Weight: Approx. 5 kg, depending on variant, see nameplate.
Outputs for alarm devices
Max. 230 VAC / max. 2 A / min. 10 mA / AC1.
Before starting any work on pumps used to pump liq-
uids which could be constituted as being hazardous
to health, thorough cleaning/venting of pumps, pits,
etc. must be carried out according to local regula-
tions.
Before making any connections in the LCD 110 or
work on pumps, pits, etc., it must be ensured that the
electricity supply has been switched off and that it
cannot be accidentally switched on.
Set the motor-protective circuit breakers to the rated
current stamped on the nameplates.
Before starting any work on pumps used to pump liq-
uids which could be constituted as being hazardous
to health, thorough cleaning/venting of pumps, pits,
etc. must be carried out according to local regula-
tions.
Before making any connections in the LCD 110 or
work on pumps, pits, etc., it must be ensured that the
electricity supply has been switched off and that it
cannot be accidentally switched on.
