Start-Up - Grundfos Multilift M Serie Instrucciones De Instalación Y Funcionamiento

Fig. 27 Wiring diagram, three-phase Multilift M.22.3.4 with
contactors
Fig. 28 Wiring diagram, three-phase Multilift M.22.3.4,
M.24.3.2, M.32.3.2 and M.38.3.2 with motor-protective
circuit breaker

9. Start-up

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 8.3 Electrical connection and
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 15 seconds to boot the controller. 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.
Furthermore, the preset overcurrent and rated motor current
must be confirmed. See section 8.4 Setting of LC 221.
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 M 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
Note
an empty cable conduit, check the direction of
rotation of the pump. See section 10.2 Motor.
29