21
7. 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 float switches 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
running can be eliminated by a renewed time setting by means
of the DIP switch according to section
or
and/
or
by moving the float switches.
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 pump in question.
9. Select the required operating mode by means of the ON-OFF-
AUTO selector switch, see section
,
or
.
8. Maintenance
During normal application and operation, the controller LCD 108
is maintenance-free.
However, it is advisable to carry out minor checks of the LCD 108
controller, pump pits, tanks, pumps, etc. at suitable intervals.
These checks should be carried out by authorized personnel.
• Check the gaskets of the LCD 108 cabinet front and those of
the Pg cable entries.
• Check the cable entries for the explosion hazard area.
• 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 float switches.
• Check for possible blockage on the suction side of the pump.
A blockage will typically be a large solid object.
• If the LCD 108 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 108 may be
installed in systems, installations and/or environments which
require thorough and regular maintenance.
9. Technical data
Voltage variants, nominal voltages
• 1 x 230 V.
• 3 x 415 V.
Voltage tolerances for LCD 108
–15 %/+10 % of nominal voltage.
See also installation and operating instructions for the pump in
question.
Mains frequency for LCD 108
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.
Short-circuit protection of supply
Depending on variant, see nameplate.
Control circuit fuse
Fine-wire fuse: 250 mA / F / 32 mm x
∅
6 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.
Cabinet LCD 108 for direct-on-line starting
• External dimensions (including glands):
Height = 590 mm, width = 380 mm, depth = 220 mm.
• Material: ABS (Acrylonitrile butadiene styrene).
• 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
liquids which could be constituted as being
hazardous to health, thorough cleaning/venting of
pumps, pits, etc. must be carried out according to
local regulations.
Before making any connections in the LCD 108 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.
Ensure that the short-circuit protection is suitable for
the installation.
Before starting any work on pumps used to pump
liquids which could be constituted as being
hazardous to health, thorough cleaning/venting of
pumps, pits, etc. must be carried out according to
local regulations.
Before making any connections in the LCD 108 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.
