Wilo Yonos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 209

Installation and operating instructions • Wilo-Yonos GIGA2.0-I/-D • Ed.01/2023-03
NOTICE
In order to avoid tipping, the motor impeller unit may have to be supported
with suitable lifting equipment. This is especially the case if no mounting
bolts are used.
25. Release the two non-detachable screws from the protective plate (Fig. II, Item 27) and
remove the protective plate.
26. Loosen the impeller fastening nut (Fig. II, Item 22). Remove the conical spring washer
(Fig. II, Item 23) underneath and pull the impeller (Fig. II, Item 21) off the pump shaft.
Disassemble key (Fig. II Item 37).
27. Loosen the screws (Fig. II, Item 10a).
28. Release the lantern from the motor centring device with a two-arm puller (universal
puller) and pull it off the shaft. The mechanical seal (Fig. II Item 25) is removed at the
same time. Avoid jamming the lantern.
29. Push the stationary ring (Fig. II, Item 26) of the mechanical seal out of its seat in the lan-
tern.
30. Carefully clean the seat areas on the shaft and the lantern.
⇒ Version DN 100 ... DN 125, 5.5 kW to 7.5 kW, Fig. III
31. Remove the motor impeller unit (see "Description of the pump" section) from the pump
housing by loosening the flange screws (Fig. I/ III, Item 29).
32. Removing the screws (Fig. I/ III, Item 29) also detaches the differential pressure sensor
from the motor flange. Suspend the differential pressure sensor (Fig. I, Item 8) with the
holder (Fig. I, Item 13) from the pressure measuring lines (Fig. I, Item 7). Disconnect the
connection cable of the DPS in the electronic module or loosen and remove it from the
plug connection.
33. To push the motor impeller unit off the pump housing, use the two adjacent threaded
holes (Fig. 104, Item 1) and use suitable screws provided on-site (e.g. M10 x 25 mm).
34. Insert an open-end wrench (SW32 mm) into the lantern window (Fig. III, Item 38) and
hold the shaft by the wrench flats. Loosen impeller nut (Fig. III, Item 22). Remove the
discs (Fig. III, Item 23) underneath and pull the impeller (Fig. III, Item 21) off the pump
shaft. Disassemble key (Fig. III, Item 37).
35. Remove mechanical seal (Fig. III, Item 25) and spacer (Fig. III, Item 20).
36. Remove the stationary ring (Fig. III, Item 26) of the mechanical seal out of its seat in the
lantern.
37. Carefully clean the seat areas on the shaft and the lantern.
Installation
NOTICE
For all the following work, observe the screw tightening torque specified
for the respective thread type ("Tightening torques" [" 135] table)!
Elastomers (O-ring, mechanical seal bellows) are easier to install with "wetted water" (e.g.
mixture of water and washing up liquid).
1. Clean the flange support and centring surfaces of the pump housing, lantern and motor
flange to ensure proper positioning of the parts.
⇒ Version DN 32 ... DN 80, Fig. I
2. Insert new stationary ring (Fig. I, Item 26) into the lantern piece.
3. Push the new mechanical seal (Fig. I, Item 25) onto the shaft. Avoid damaging the mech-
anical seal by jamming it.
4. Push the new spacer (Fig. I, Item 20) onto the shaft.
5. Push the rear retaining ring (Fig. I, Item 36b) onto the pump shaft.
6. Fit the impeller (Fig. I, Item 21) onto the shaft.
en
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