Start Up - Wilo -MVI 10 Instrucciones De Instalación Y Funcionamiento

• The pump/installation should be grounded in com-
pliance with local regulations. A ground fault inter-
rupter can be used as extra protection.
• The connection to the network must be in accor-
dance with the connection plan (see Fig. 4).
• The position of the terminal box can be changed a
quarter turn by removing the motor attachment
screws (if necessary, remove the coupling guards)
and turning the motor to the desired position.
WARNING! Bodily injury!
Refit the attachment screws of the motor and the
coupling guards.
WARNING! Electrical shock hazard
DO NOT FORGET TO CONNECT TO GROUND.
• The electric motors used on the pumps can be con-
nected to a frequency converter. Strictly follow the
instructions given by the data sheet of the con-
verter's manufacturer.
The converter must not generate voltage peaks at
the motor terminals higher than 850 V and dU/dt
(Voltage/Time variation) higher than 2500 V/µs. If
the value of the voltage signal are higher than those,
risk of damage the motor are to forecast.In the con-
trary provide a LC filter (inductance – capacitor)
between the converter and the motor. It must be
connected to the motor with a minimum length
cable, armoured if necessary.

8 Start up

8.1 Preliminary rinsing
WARNING! Health hazard
Pumps are tested regarding hydraulic features in
factory, some water may remain in them. It is rec-
ommended for hygiene purposes, to carry out a
rinsing of the pump before any using with potable
water supply.
8.2 System filling - Venting
CAUTION! Possible damage of the pump
Never operate the pump dry.
Two standard cases:
- Fig. 1: Suction lift applications
- Fig. 2: Flooded or pressurized suction
applications on storage tank (9) or town water
supply (10) with dry-running protection system.
Air evacuation process with pump under pressure
(see fig. 2):
• Close the discharge valve (3)
• Open the venting plug (5), and the suction valve (2)
and completely fill the pump.
Installation and operating instructions Wilo-MVI 10, 15, 30, 50, 80
All manuals and user guides at all-guides.com
• Close the venting plug only after water flows out
with no visible air at the venting plug.
WARNING! Bodily injury
Pump under pressure! In hot water, a stream of
water may escape from the venting port.Take all
required precautions as regards persons and
motor.
Air evacuation process with pump in suction (see
fig. 5):
Two possible cases:
1st case (see fig. 5.1)
- Close the discharge valve (3), open the suction
valve (2)
- Remove the venting plug (5)
- Unscrew the bottom drain-priming plug (6)
located on the pump casing 4 to 5 turns.
- Put a funnel into the venting plug port and com-
pletely fill the pump and the suction pipe.
- After water flows out with no visible air at the
vent plug , filling is complete.
- Screw the venting plug and the bottom drain-
priming plug back in.
2nd case (see fig. 5.2)
Filling can be made easier by fitting on the suction
pipe of the pump, a vertical pipe fitted with a Ø ½"
ball valve and a funnel.
English
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