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Installation and operating instructions • Wilo-Yonos GIGA2.0-I/-D • Ed.02/2023-08
CAUTION
Material damage due to turbine and generator operation!
Flowing through the pump in the direction of flow or against the direc-
tion of flow can cause irreparable damage to the drive.
Install a swing check valve on the discharge side of each pump!
r ≈ 2,5 * (d-2s)
5 x DN
Fig. 12: Settling section upstream and downstream of the pump
NOTICE
Avoid flow cavitation!
• A settling section must be provided upstream and downstream of the
pump in the form of a straight pipe. The length of the settling section
must be at least 5 times the nominal diameter of the pump flange.
•
The pipes and pump must be free of mechanical stress when installed.
•
The pipes must be fixed in such a way that the pump does not have to support the
weight of the pipes.
•
Clean and flush the unit before connecting the pipes.
•
The direction of flow must correspond with the direction arrow on the pump flange.
•
Venting of the pump is best ensured when the air vent valve is pointing upwards (Fig. 9,
Item 1). If the motor shaft is vertical, any orientation is permitted. See also "Permissible
installation positions" section.
•
Leakages on the clamping ring screw connection (Fig. I, Item 5/9) can be caused by
transportation (e.g. setting behaviour) and handling of the pump (turning the drive, at-
taching insulation). Further turning the clamping ring screw connection by a 1/4 turn re-
solves the leakage.
If the leakage persists after this 1/4 turn, do not turn any further, but replace the
screwed connection.
Fig. 13: Further turning the clamping ring screw connection by a 1/4 turn
en
137
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