Wilo Stratos GIGA Série Notice De Montage Et De Mise En Service page 91

r ≈ 2,5 * (d-2s)
5 x DN
Fig. 21: Settling section upstream and
downstream of the pump
Pumping out of a tank
Condensate drainage, insulation
Installation and operating instructions Wilo-Stratos GIGA, GIGA-D, GIGA B
NOTICE:
Shut-off devices must be installed upstream and downstream from
the pump in all cases, in order to avoid having to drain the entire sys-
tem when checking or replacing the pump. A non-return valve must
be installed on the pressure side of each pump.
CAUTION! Risk of property damage!
A volume flow going against or with the direction of flow (turbine
operation or generator operation) can cause irreparable damage to
the drive.
• A non-return valve must be installed on the pressure side of each
pump.
NOTICE:
A settling section must be provided upstream and downstream of the
pump, in the form of a straight pipe. The length of this settling section
should be at least 5 x DN of the pump flange (Fig. 21). This measure
serves to avoid flow cavitation.
• The pipes and pump must be free of mechanical stress when installed.
The pipes must be fixed in such a way that the pump is not supporting
the weight of the pipes.
• The direction of flow must correspond with the direction arrow on the
pump housing flange.
• The air vent valve at the lantern (Fig. 6, Item 1.31) must always face
upwards if the motor shaft is horizontal (Fig. 6a: and Fig. 6b:). If the
motor shaft is vertical, any orientation is permitted. See also Fig. 18:
"Permitted installation positions with horizontal motor shaft" on
page 89 and Fig. 19: "Permitted installation positions with vertical
motor shaft" on page 89.
• All installation positions except for "motor facing down" are allowed.
• The electronic module must not face downwards. If required, the
motor can be turned after loosening the hexagon head screws.
NOTICE:
After loosening the hexagon head screws, the differential pressure
sensor is attached to the pressure measuring lines only. When turning
the motor housing, make sure that the pressure measuring lines are
not bent or kinked. Furthermore, while rotating the motor housing,
it must be ensured that the housing O-ring seal does not become
damaged.
• For the permitted installation positions, see chapter 7.1 "Permitted
installation positions and change of the arrangement of components
before the installation" on page 88.
NOTICE:
Stratos GIGA B series monobloc pumps are to be mounted on a suffi-
ciently strong base or mounting brackets.
• The pump support foot for the Stratos GIGA B must be firmly screwed
onto the foundation to ensure that the pump has a secure footing.
NOTICE:
When pumping out of a tank, ensure that the liquid level is always
high enough above the suction port of the pump so that the pump
never runs dry. The minimum inlet pressure must be observed.
• When the pump is used in air-conditioning or cooling systems, the
condensation that forms in the lantern can be drained specifically via
an existing hole. A drain pipe can be connected at this opening. Small
amounts of fluid leakage can be also drained off.
The motors are equipped with holes for condensation which are
sealed with plastic plugs at the factory (in order to guarantee that
protection class IP55 is achieved).
(11-22kW)
English
91