Wilo -MVISE-2G Betriebsanleitung Seite 24

English
tallation plan see fig.3).
• Foresee an insulating material under the concrete
block (cork or reinforced rubber) to avoid any
noise and vibration transmission into the instal-
lations.
• Before final tightening of anchor bolts, ensure
that the pump axis is vertical : use shims if
necessary.
5.2 Hydraulic connections
CAUTION !
Possible damage of the installation !
The installation has to bear the pressure reached
when the pump runs at maximum frequency and
zero flow rate.
• Pump connection with threaded screw-on tubes
directly on the tapped oval counter flanges deli-
vered with the pump.
• The diameter of the pipe must never be smaller
than the one of the counter flange.
• The direction of the fluid flow is indicated on the
identification label of the pump.
• Use supports or collars (fig. 1, 2 - item. 7) so that
the pump does not bear the weight of the pipes.
CAUTION !
Water potable using!
In order to avoid
the proliferation of bacteria, the tank must be
flow-through and equipped with the insulation
valve type "flow jet" (fig.2-item12).
CAUTION !
Possible damage of the installation !
It is recommended to connect the non-return
valve to the pump discharge to protect it against
hammer blow effects.
5.3 Electrical connections
The electric connections and inspections have to
be carried out by a qualified electrician and have
to comply with the relevant local standards.
• The electric characteristics (frequency, voltage,
nominal current) of the motor-converter are
mentioned on the nameplate. Check that the
motor-converter complies with the mains supply
used.
• The electric protection of the motors is integra-
ted into the converter. The parameters take into
account the characteristics of the pump and
must ensure its protection and the one of the
motor.
• In case of impedance between earth and neutral
point, install a protection before motor-conver-
ter.
• Provide a fuse disconnecting switch (type GF) or
a circuit-breaker to protect the mains installation
(fig. 1 - item. 9).
WARNING ! If you have to install a differential
circuit-breaker for users protection, it must have
a delay effect.
24
CAUTION ! Adjust it according to the current
mentioned on the converter label.
Main network
- Use power cables conforming with standards.
DO NOT FORGET TO CONNECT TO EARTH.
The electric connection of the converter (fig.4)
according to its operating modes (see chapter 8
for starting) has to comply with the schemes of
the following table .
CAUTION ! A connection error can damage the
converter.
The power cable must never touch the pipe or the
pump ; make sure that it is sheltered from any
humidity.
WILO AG 06/2008