Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service page 161

Installation and operating instructions Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D
Installation
NOTICE
Simplify subsequent work on the unit!
• To ensure the entire unit does not have to be emptied, install shut-off valves up-
stream and downstream of the pump.
CAUTION
Material damage due to turbine and generator operation!
Flowing through the pump in the direction of flow or against the direction 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. 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.
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The pipes and pump must be free of mechanical stress when installed.
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The pipes must be fixed in such a way that the pump does not have to support the
weight of the pipes.
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Clean and flush the unit before connecting the pipes.
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The direction of flow must correspond with the direction arrow on the pump
flange.
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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
permitted. See also "Permissible installation positions" [} 154] section.
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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,
attaching insulation). Further turning the clamping ring screw connection by a
1/4 turn resolves the leakage.
Fig. 12: Further turning the clamping ring screw connection by a 1/4 turn
en
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