Maintenance And Service - Grundfos Multilift MOG Installations- Und Bedienungsanleitung

9. Startup
Warning
Before starting any work on a pump used for
pumping liquids which could be hazardous to
health, clean and vent the pump, pit, etc.,
thoroughly according to local regulations.
Warning
Before making any connections in LC 221 or
working on pump, pit, etc., make sure that the
power supply has been switched off and that it
cannot be accidentally switched on.
Prior to start-up, the connection and settings must have been
carried out according to sections
8.4 Setting of LC 221.
Start-up must be carried out by authorised personnel.
Proceed as follows:
1. Check all connections.
2. Connect the plug to the power supply and follow the controller
start-up sequence.
Note: It will take up to 45 seconds to boot the controller. It can
be interrupted down to 5 seconds by pressing OK button.
When the power supply is connected for the first time, three
values for the start level can be chosen (180, 250 or 315 mm
above floor level) according to the inlet height to the collecting
tank. If the inlet height is between two levels choose the lower
level for start in the display. All other settings are preset.
Some can be changed. See section
Now the controller is ready for automatic mode
(selector switch in pos. AUTO).
3. Open the isolating valves in discharge and inlet lines.
4. Activate a sanitary appliance connected to the inflow of the
Multilift MOG or MDG and monitor the increasing liquid level
in the tank up to the start level. Check the starts and stops at
least twice.
If the pump cable was disconnected from the
controller, for instance to lead the cable through
an empty cable conduit, the wires must be
Note
connected in accordance with the wiring
diagrams.
26
8.3 Electrical connection and
8.4 Setting of LC 221.

10. Maintenance and service

The Multilift MOG and MDG require a minimum of maintenance.
Warning
Before carrying out maintenance and service on
lifting stations used for pumping liquids which
might be hazardous to health, make sure that the
lifting station has been thoroughly flushed with
clean water and that the discharge pipe has been
drained. Rinse the parts in water after
dismantling. Make sure that the isolating valves
have been closed. The work must be carried out
in accordance with local regulations.
Warning
Before making any connections in LC 221 or
working on lifting stations, make sure that the
power supply has been switched off and that it
cannot be accidentally switched on.
According to EN 12056-4, lifting stations must be checked at the
following regular intervals:
• every 12 months in single-family houses
• every 6 months in multi-family dwellings
• every 3 months in commercial and industrial applications.
During the check, local regulations must be observed.
The periodic checks of the lifting station should be carried out by
authorised personnel and must comprise electrical and
mechanical maintenance.
Check the following points:
• Discharge and inlet connections
Check all connections to the lifting station for tightness and
leakages. Make sure that weight from the inlet, discharge and
venting pipes does not rest on the tank. Long pipe sections,
valves, etc. must be supported.
• Power consumption
See nameplate.
• Cable entry
Make sure that the cable entry is watertight and that the
cables are not bent sharply and/or pinched.
• Pump parts
Open the clamp of the pump housing, remove the pump from
the tank and check the grinder system. Check that the venting
tube to the tank is not blocked. When the pump is mounted
again, we recommend replacing the O-ring between pump and
tank. Make a test run with clean water. In case of noise,
vibration or abnormal running, contact Grundfos.
• Ball bearings
Check the shaft for noisy or heavy operation.
Replace defective ball bearings. A general overhaul of the
pump is usually required in case of defective ball bearings or
poor motor function. This work must be carried out by the
manufacturer or an authorised service workshop.
• Check non-return and isolating valves for correct function.