Pipe Connection; Electrical Connection - Wilo Multivert MVISE-3G Instrucciones De Instalación Y Funcionamiento

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7.3

Pipe connection

- Connect the pump to the pipes using suitable
counter flanges, bolts, nuts and gaskets.
CAUTION!
The nut tightening torques must not exceed the
following values:
Do not use impact wrenches.
- The arrow on the pump housing shows the direc-
tion of flow of the fluid.
- During installation of the suction line and the
pressure pipe, make sure that the pump is not
under tension. The pipes must be attached so
that their weight is not borne by the pump.
- The pump must be equipped with stop valves on
the suction side and on the pressure side.
- The use of compensators can lessen the devel-
opment of pump noise and vibration.
- The diameter of the pipe must be at least as
large as the diameter of the pump's suction port.
- The pressure pipe can be equipped with a
non-return valve to protect the pump from the
effects of fluid hammer.
- If the pump is directly connected to a public
drinking water network, the suction line must
be equipped with a non-return valve and a stop
valve.
- If the pump is indirectly connected to a public
drinking water network via a diaphragm pressure
vessel, the suction line must be equipped with a
non-return valve and a suction strainer to pre-
vent contaminants from entering the pump.
- The cables for the sensor, the external instruction, the
inputs [Ext. Off] and [Aux] must be shielded.
44
M10 = 20 Nm
M12 = 30 Nm
1.1
M20
M12
M25
7.4

Electrical connection

DANGER! Risk of fatal injury!
Hazardous voltage due to the discharge of the
converter capacitors.
• Before any work on the converter, wait for
5 minutes after disconnecting the power supply.
• Check that all electrical connections and con-
tacts are not live.
• Check that the pressure connection terminals
have been allocated correctly.
• Make sure that the pump and the installation are
properly grounded.
- The power supply cable (3 phases + earth) must
be inserted into the gland indicated below in
black.
- The glands that aren't used must remain sealed
using plugs provided by the manufacturer.
1.1
Power (kW)
Cable shielding
M12
M16
Power (kW)
2
M25
2
WILO SE 04/2020