Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service page 264

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19.2.2 Replacing the motor/drive
264
Maintenance
been secured with at least one screw (Fig. I/III, Item 10 or Fig. III, Item 29), the fixa-
tion material can be removed from the transport lugs.
15. Screw in the screws (Fig. I/III, Item 10 or Fig. III, Item 29) but do not tighten them all
the way. The motor impeller unit is drawn into the pump housing whilst the screws
are being screwed in.
CAUTION
Damage due to incorrect handling!
While screwing in the screws, check that the shaft can be turned by slightly turning
the fan wheel. If the shaft is difficult to move, tighten the screws alternately and di-
agonally.
16. If the screws (Fig. I, Item 4) have been removed, screw in the screws again. Clamp
the holder (Fig. I, Item 13) of the differential pressure sensor under one of the
screw heads (Fig. I/III, Item 10 or Fig. II, Item 29) on the side opposite the electronic
module. Screw in the screws (Fig. I/III, Item 10 or Fig. III, Item 29) all the way.
17. Move the transport lugs (Fig. I, Item 30) displaced in step 7 in the section "Dis-
mantling" back from the motor housing to the motor flange.
NOTICE
Observe the commissioning measures (see section "Commissioning" [} 176]).
18. Re-clamp the connection cable of the differential pressure sensor/mains cable.
19. Open the shut-off devices upstream and downstream of the pump.
20. Reset the fuse.
Increased bearing noises and unusual vibrations indicate bearing wear. The bearings or
motor must then be replaced. The drive may only be replaced by the Wilo customer ser-
vice!
DANGER
Risk of fatal electrical shock! Generator or turbine operation during
pump flow!
Even without the electronic module (without electrical connection), there may be
dangerous contact voltage at the motor contacts!
• Check for absence of voltage and cover or cordon off adjacent live parts!
• Close the shut-off devices upstream and downstream of the pump!
WARNING
Personal injury due to strong magnetic forces!
Opening the motor leads to high, abruptly occurring magnetic forces. This can lead
to serious cuts, crushing injuries and bruises.
• Do not open the motor!
• Only allow Wilo customer service to dismantle and install the motor flange and
the bearing plate for maintenance and repair work!
NOTICE
The magnets inside the motor do not pose a risk to persons with pacemakers
provided that the motor is not opened and the rotor is not dismantled. The motor/
drive can be replaced without any risk.
1. Carry out steps 1 ... 20 to dismantle the motor in accordance with section "Repla-
cing the mechanical seal".
2. Remove the screws (Fig. I, Item 4) and pull the electronic module vertically upwards
(Fig. I, Item 1).
WILO SE 2021-12