Start-Up; Maintenance - Grundfos LC 110 Montage- Und Betriebsanleitung

7. Start-up

Warning
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 LC 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.
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 inlet is submerged in the liquid to be
pumped.
3. Set the motor protection relay to the rated current stated on
the nameplate.
4. Warning:
Warning
Set the motor-protective circuit breaker to the rated
current stamped on the nameplate.
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 pump, see section 4.5,
7. Check that the pump is not running dry. The risk of dry running
can be eliminated by a renewed time setting by means of the
DIP switch (stop delay) according to section 4.2,
and/or by moving/shortening the electrodes.
8. Three-phase pumps only: Check whether the direction of
rotation of the pump 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 4.5,
16
4. to 6.
5.5 or 6.5.
5.2 or 6.2
5.5 or 6.5.

8. Maintenance

Warning
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 LC 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.
During normal application and operation, the LC 110 controller is
maintenance-free.
However, it is advisable to carry out minor checks of the LC 110
controller, pump pits, tanks, pumps, etc. at suitable intervals.
These checks should be carried out by authorized personnel.
• Check the gaskets of the LC 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 LC 110 has been installed in a particularly aggressive
environment, it is advisable to check the motor protection
contacts 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.
The above list is not complete. The LC 110 may be
installed in systems, installations and/or
Note
environments which require thorough and regular
maintenance.