Grundfos Multilift M Serie Instrucciones De Instalación Y Funcionamiento página 26

Fig. 18 Untightened screw in outer ring
Multilift M lifting stations are supplied with loose
screws in the outer ring of the turnable inlet disk.
See fig. 18. Check and tighten all screws to max.
Caution
tightening torque of 9 Nm before connecting the
inlet pipe.
If the main inlet is not to be used, it can easily be
plugged using a standard DN 100 pipe plug
fastened with three screws and washers.
See fig. 19.
Note
Only the screws and washers are supplied with
the lifting station. The pipe plug must be bought
separately.
Fig. 19 Plugging the main inlet
3. Prepare optional inlet by cutting out the desired one.
Use cup drills ∅150 for DN 150, ∅100 for DN 100 and ∅43 for
DN 50 inlets. The cutting line is recessed. To avoid sharp
cutting edges, the hole must be deburred. The socket seals
are provided with collars.
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4. Prepare the connection for diaphragm pump (optional).
Use cup drill, ∅43, for DN 50 connection socket. To avoid
sharp cutting edges, the hole must be deburred.
DN 50 - ∅43
DN 100 - ∅100
DN 150 - ∅150
Fig. 20 Cutting or drilling of optional connection holes
5. Connect the inlet pipe to the tank.
Install an isolating valve between inlet pipe and lifting station
to avoid inflow during maintenance and service.
We recommend an easy-to-handle PVC isolating valve.
Fig. 21 Installation of isolating valve
Make sure that weight from inlet, discharge and
Caution
vent pipes does not rest on the tank. Long pipe
sections, valves, etc. must be supported.
Warning
Never step on the lifting station.