Wilo Yonos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 208

en
Fig. 104: Pressing off the motor impeller unit
via threaded holes (DN 100 ... DN 125)
208
6. Disconnect mains connection cable. If present, remove the cable of the differential
pressure sensor on the DPS.
7. Depressurise the pump by opening the air vent valve (Fig. I, Item 28).
NOTICE
It is recommended to dismantle the module for better handling prior to
dismantling the motor impeller unit (see "Replacing the electronic mod-
ule" [" 212] section).
8. Leave two transport lugs (Fig. I, Item 30) on the motor flange.
9. Attach motor impeller unit to the transport lugs with suitable lifting equipment for
protection (Fig. 6).
⇒ Version DN 32 ... DN 80, Fig. I
10. Remove the motor impeller unit (see "Description of the pump" [" 121] section) from
the pump housing by loosening the flange screws (Fig. I, Item 29).
NOTICE
Avoid damaging the plastic parts such as the upper part of the module
while attaching the lifting accessory.
11. Removing the screws (Fig. I, 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).
12. Remove the O-ring (Fig. I, Item 19).
13. Remove the front retaining ring (Fig. I, Item 36a) from the shaft.
14. Pull the impeller (Fig. II, Item 21) off the shaft.
15. Remove the rear retaining ring (Fig. I, Item 36b) from the shaft.
16. Pull the spacer (Fig. I, Item 20) off the shaft.
17. Pull the mechanical seal (Fig. I, Item 25) off the shaft.
18. Press the stationary ring (Fig. I, Item 26) of the mechanical seal out of the seat in the
motor flange and clean the seat surfaces.
19. Clean the seating surfaces of the shaft carefully.
⇒ Version DN 100 ... DN 125, to 4.0 kW, Fig. II
20. Loosen and remove the screws (Fig. II, Item 29).
21. Loosen and remove the screws (Fig. II, Item 10). The motor impeller unit remains se-
curely in the pump housing after the screws have been removed. There is no danger of
tipping even if the motor shaft is horizontal.
NOTICE
The best tool for removing the screws (Fig. II, Item 10) is an angle spanner
or socket wrench with a spherical head, especially for pump types with
tight spaces.
22. Removing the screws (Fig. II, Item 10), 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 differential pressure sensor in the electronic module.
23. Pull the motor impeller unit off the pump housing. Use the two threaded holes (see
Fig. 104, Item 1) for this purpose.
24. Screw M10 screws with a suitable length into the threaded holes to loosen the seat.
After approx. 40 mm of pressing out, the motor impeller unit will no longer be guided in
the pump housing.
Installation and operating instructions • Wilo-Yonos GIGA2.0-I/-D • Ed.01/2023-03