Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 147

Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
r ≈ 2,5 * (d-2s)
5 x DN
Fig. 11: 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.
• The air vent valve at the lantern (Fig. I, Item 28) must always be pointing upwards if the
motor shaft is horizontal (Fig. 8). If the motor shaft is vertical, any orientation is permit-
ted. See also "Permissible installation positions" [} 140] section.
• Leakages on the clamping ring screw connection (Fig. I, Item 5/6) 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.
Fig. 12: Further turning the clamping ring screw connection by a 1/4 turn
en
147