Wilo Stratos GIGA Notice De Montage Et De Mise En Service page 112

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7.5 Preparing the installation
112
Turn of motor impeller unit relative to pump housing
1. Rotate the motor impeller unit by 90° or 180° in the desired direction and install the
pump in reverse order.
2. Secure the differential pressure sensor mounting bracket with one of the screws on
the side opposite the electronic module. The position of the differential pressure
sensor relative to the electronic module does not change.
3. Wet the O-ring (Fig. I/II/III, Item 1.14) well before installation (do not install the O-ring
when it is dry).
4. Before commissioning, fill the pump/system and supply it with the system pressure,
then check impermeability. In the event of a leakage at the O-ring, air will first escape
from the pump. The leakage can be checked with a leakage spray at the gap between
the pump housing and the lantern, for example, as well as at their screwed connec-
tions.
5. In the event of continual leakage, use a new O-ring, if need be.
6. When reinstalling the differential pressure sensor, bend the pressure sensing lines as
little as possible and evenly into a suitable position. When doing this, do not deform
the areas at the clamp boltings.
Check whether the pump complies with the specifications on the delivery note; report any
damage or missing parts to Wilo immediately. Check slatted crates/boxes/wrapping for
spare parts or accessories that could be included with the pump.
Installation and operating instructions • Wilo-Stratos GIGA, Wilo-Stratos GIGA-D, Wilo-Stratos GIGA B • Ed.01/2024-02
NOTICE
To make the installation work easier, it can be helpful to install the pump
in the piping. Do not connect the pump electrically or fill the pump or
system.
For installation steps, see section "Replacing the mechanical seal".
NOTICE
Always make sure that the O-ring (Fig. I/II/III, Item 1.14) is not twisted or
squeezed during installation.
CAUTION
Material damage due to bent or kinked pressure sensing lines.
Improper handling can damage the pressure sensing line.
When turning the motor impeller unit, do not bend or kink pressure sens-
ing lines.
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. If necessary, loosen the
screws again and tighten them evenly crosswise.
NOTICE
If the differential pressure sensor is turned, do not interchange the dis-
charge and suction sides on the differential pressure sensor!
For additional information on the differential pressure sensor, see section
"Electrical connection".