Wiring Diagrams; Startup - Grundfos Multilift MSS Installation And Operating Instructions Manual

7.5 Wiring diagrams

Fig. 17 Wiring diagram for Multilift MSS, single-phase
Fig. 18 Wiring diagram for Multilift MSS, three-phase

8. 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 220 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 startup, the connection and DIP-switch setting must have
been carried out according to sections
and 7.4 Setting of LC 220.
Startup must be carried out by authorised personnel.
Proceed as follows:
1. Check all connections.
2. Open the isolating valves in outlet and inlet lines.
3. Switch on the power supply.
4. Activate a sanitary appliance connected to the inflow of the
Multilift MSS and monitor the increasing water level in the tank
up to the start level. Check the starts and stops at least twice,
and then change the ON-OFF-AUTO selector switch to
automatic mode.
7.3 Electrical connection
13