Wilo Wilo-Helix V FIRST V 2.0-VE 10, Инструкция по установке и эксплуатации

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Commissioning en
Installation and operating instructions Wilo-Helix V, FIRST V, 2.0-VE 2-4-6-10-16 17
7.5 Electrical connection
WARNING
Electrical shock hazard!
Dangers caused by electrical energy must be excluded.
• Electrical work by a qualified electrician only!
• All electrical connections must be performed after the electrical supply has been
switched off and secured against unauthorized switching.
• For safe installation and operation a proper grounding of the pump to the power
supply’s grounding terminals is required.
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Check that operating current, voltage and frequency used comply with motor plat-
ing data.
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The pump must be connected to the power supply by a solid cable equipped with a
grounded plug-connection or a main power switch.
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Three-phase motors must be connected to an approved motor starter. The set
nominal current must correspond to the electrical data on the pump motor name
plate.
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Single-phase motors have integrated thermal protection, which ensures that the
pump shuts down if the allowable winding temperature is exceeded and restarts
automatically once it is cooled.
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The supply cable must be laid so that it never touches the pipework and/or the
pump and motor casing.
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The pump/installation should be grounded in compliance with local regulations. A
ground fault interrupter can be used as extra protection.
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The mains connection must be in accordance with the connection plan (Fig. 5 for
three-phase motor), (for single-phase motor see connection plan in the motor ter-
minal box).
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Three-phase motors should be protected by a circuit-breaker for the IE class of the
motors. Current setting should be adapted to the pump usage, without exceeding
the value Imax written on the motor nameplate.
7.6 Operation with frequency con-
verter
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Motors used can be connected to a frequency converter in order to adapt pump
performance to duty point.
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The converter must not generate voltage peaks at motor terminals higher than
850V and dU/dt slope higher than 2500 V/μs.
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In case of higher value, an appropriate filter must be used: contact converter man-
ufacturer for this filter definition and selection.
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Strictly follow instructions provided by the converter manufacturer data sheet for
installation.
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Minimum variable speed should not be set below 40% of pump nominal speed.
8 Commissioning
Unpack the pump and dispose of the packaging in an environmentally-responsible
manner.
8.1 System filling - Venting
CAUTION
Possible damage of the pump!
Never operate the pump dry.
The system must be filled before starting the pump.
Air evacuation process – Pump with sufficient supply pressure (Fig. 3)
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Close the two guard valves (2, 3).
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Unscrew the venting screw from filling plug (6a).
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Slowly open the guard valve on the suction side (2).
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Retighten the venting screw when air escapes at the venting screw and the
pumped liquid flows (6a).