Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual page 203

18.2.2 Replacing the motor/drive
Installation and operating instructions Wilo-Yonos GIGA2.0-I/-D
Maintenance
18. Screw in the screws (Fig. II, Item 29). The motor impeller unit is drawn into the
pump housing whilst the screws are being screwed in.
⇒ Both versions
⇒ If the electronic module was dismantled, it must now be reassembled. See "Re-
placing the electronic module" [} 204] section.
CAUTION
Damage due to incorrect handling!
While screwing in the screws, check the rotatability of the shaft by turning it slightly.
To do this, insert an Allen key through the opening in the fan cover (Fig. 5). If the
shaft is difficult to move, tighten the screws alternately and diagonally.
19. Clamp the holder (Fig. I, Item 13) of the differential pressure sensor under one of
the screw heads (Fig. I, Item 29 or Fig. II, Item 10) on the side opposite the elec-
tronic module. Finally, tighten the screws (Fig. I, Item 29 or Fig. II, Item 10).
20. 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" [} 145]).
21. Re-clamp the connection cable of the differential pressure sensor/mains cable.
22. Open the shut-off devices upstream and downstream of the pump.
23. 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. To dismantle the motor, carry out steps 1 ... 8 according to section "Replacing the
mechanical seal" [} 200].
2. Remove the screws (Fig. I, Item 4) and pull the electronic module vertically upwards
(Fig. I, Item 1).
en
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