Wilo Yonos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 134

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134
5. Press the motor impeller unit (see Fig. 4) off the pump housing. Use the two threaded
holes for this (see Fig. 11). Screw M10 screws with a suitable length into the threaded
holes to loosen the seat.
6. Place the motor impeller unit including the mounted electronic module on a suitable
workstation and secure it.
7. Release the two non-detachable screws from the protective plate (Fig. II, Item 27) and
remove the protective plate.
8. Put an open-end wrench with 27 mm width across flats into the lantern window and
hold the shaft steady at the wrench flats (Fig. II, Item 16). Unbolt the impeller nut
(Fig. II, Item 22). Remove the impeller (Fig. II, Item 21) from the shaft with a puller.
9. Loosen the screw (Fig. II, Item 10) to remove the holder for the differential pressure
sensor (Fig. I, Item 13) from the motor flange. Suspend the differential pressure sensor
(Fig. I, Item 8) with the holder (Fig. I, Item 13) from the pressure sensing lines (Fig. I,
Item 7). Disconnect the connection cable of the differential pressure sensor in the
electronic module, if necessary.
10. Loosen and remove the screws (Fig. II, Item 10 and Item 10a).
11. 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. I, Item 25) will also be re-
moved when this is done. Avoid jamming the lantern.
12. If the mechanical seal has been damaged, push the stationary ring (Fig. I, Item 26) of
the mechanical seal out of its seat in the lantern. Insert a new stationary ring in the
lantern.
NOTICE
For the following steps, observe the screw tightening torque specified
for the respective thread type! See table "Screws and tightening
torques" [" 135].
13. Carefully push the lantern over the shaft and position it in the desired alignment to the
motor flange. Observe the permitted installation positions of the components when
doing this. Secure the lantern to the motor flange with the screws (Fig. II, Item 10 and
Item 10a). Tighten the screw for the holder (Fig. II, Item 10) only slightly.
14. Push the undamaged or new mechanical seal (Fig. I, Item 25) onto the shaft.
15. To mount the impeller, insert an open-end wrench with 27 mm width across flats into
the lantern window and hold the shaft steady at the wrench flats (Fig. II, Item 16).
16. Install the impeller with lock washer and nut. Avoid damage to the mechanical seal due
to jamming.
17. Hold the shaft and tighten the impeller nut to the specified tightening torque (see
table "Screws and tightening torques" [" 135]).
18. Remove the open-end wrench and reinstall the protective plate (Fig. II, Item 27).
19. If the O-ring has been damaged: Clean the lantern groove and insert the new O-ring
(Fig. II, Item 19).
20. Attach motor impeller unit to the transport lugs with suitable lifting equipment for
protection. To prevent the unit from tipping, place a belt loop around the motor. When
attaching, avoid damaging the electronic module (Fig. 6/7).
21. Insert the motor impeller unit (Fig. 4) into the pump housing with the air vent valve fa-
cing upwards. Observe the permitted installation positions of the components when
doing this.
22. Screw in the screws (Fig. II, Item 29).
23. Carefully pull the differential pressure sensor (Fig. I, Item 8) into the planned position
and turn it. To do this, touch the capillary tubes (Fig. I, Item 7) at the union points of
the differential pressure sensor. Make sure that the capillary tubes are evenly de-
formed. Secure the differential pressure sensor to one of the screws on the holder
(Fig. I, Item 13). Slide the holder under the head of one of the screws (Fig. II, Item 10).
Finally, tighten the screw (Fig. II, Item 10).
24. Reconnect the connection cable of the differential pressure sensor.
Installation and operating instructions • Wilo-Yonos GIGA2.0-I/-D • Ed.01/2023-03