Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual page 126

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Fig. 11: Pressing off the motor impeller unit via
threaded holes (DN 100 ... DN 125)
126
Installation
5. Remove the motor impeller unit (see Fig. 4) from the pump housing. To do this,
loosen all screws (DN 32 ... DN 80: Fig. I, Item 29; DN 100 ... DN 125: Fig. II, Item 29).
Press the motor impeller unit off the pump housing.
1
For DN 80 ... DN 125 use the two threaded holes (Fig. 11, Item 1). Screw M10
screws with a suitable length into the threaded holes to loosen the seat.
NOTICE
For the following steps, observe the screw tightening torque specified for the re-
spective thread type! See table "Screws and tightening torques" [} 128].
6. If the O-ring has been removed, moisten the O-ring (Fig. I, Item 19) and insert it
into the pump housing (DN 32 ... DN 80) or into the lantern groove
(DN 100 ... DN 125).
NOTICE
Always make sure that the O-ring (Fig. I, Item 19) is not twisted or squeezed during
installation.
7. Insert the motor impeller unit (Fig. 4) into the pump housing in the desired posi-
tion.
8. Screw in the screws (Fig. I/II, Item 29) evenly crosswise, but do not tighten them
yet.
CAUTION
Damage due to incorrect handling!
Not screwing the screws in properly can lead to sluggishness of the shaft.
While screwing in the screws, check the rotatability of the shaft with a socket
wrench on the fan wheel of the motor (Fig. 5). If necessary, loosen the screws again
and tighten them evenly crosswise.
9. Clamp the holder (Fig. I, Item 13) of the differential pressure sensor under one of
the screw heads (Fig. I, Item 29 and Fig. II, Item 10) on the side opposite the elec-
tronic module. Find optimum between laying the capillary tubes and DPS cable.
Then tighten the screws (Fig. I, Item 29 and Fig. II, Item 10).
10. Reconnect the connection cable of the differential pressure sensor (Fig. I, Item 8).
11. Replace the transport lugs (Fig. I, Item 30) that were moved in step 1.
When reinstalling the differential pressure sensor, bend the pressure sensing lines as
little as possible and evenly into a suitable position. Do not deform the areas at the
clamp boltings.
To achieve optimum guidance of the pressure sensing lines, the differential pressure
sensor can be separated from the holder (Fig. I, Item 13), rotated 180° around the lon-
gitudinal axis and re-installed.
NOTICE
If the differential pressure sensor is turned, do not interchange the discharge and
suction sides on the differential pressure sensor!
For additional information about the differential pressure sensor, see "Electrical con-
nection" [} 134] section.
WILO SE 2022-05