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INXWPY. 1610. 4438880_01
10. ELECTRICAL WIRINGS
NXW chillers are completely wired in the factory and only need the
connection to the electricity mains supply, downstream from a group
switch, according
to the regulations in force in the country where the machine is installed.
It is also suggested to check:
−
the mains supply characteristics, to ensure it is suitable for the levels
indicated in the electrical data table, also taking into consideration any
other equipment that may be operating at the same time.
−
The unit is only powered after the last (hydraulic and electric)
installations.
−
Follow the connections instructions of the phase conductors, and
earth.
−
The power supply line will have a special protection upstream against
short circuits and earth losses that sections the system according to
other users.
−
The voltage should be within a tolerance of ± 10% of the rated supply
voltage of the machine (for Three-phase units displacement max 3%
between the phases). If these parameters are not respected, contact
the energy supplier. For electrical wirings use isolated double cables
according to the standards in force in the different countries.
−
It is necessary to use a omnipolar thermomagnetic switch, in compliance
with the CEI-EN standards (contact opening of at least 3 mm), with
adequate switch capability and differential protection based on the
followed electrical data table, installed as close as possible to the
machine.
−
It is necessary to carry out an efficient earth connection. The
manufacturer can not be held responsible for any damage caused by the
failure and ineffective earthing of the machine.
−
For units with Three-phase power check the correct connection of the
phases.
WARNING:
It is forbidden to use water pipes for the earthing of the machine.
10.1. RECOMMENDED SECTION OF ELECTRIC CABLES
The cable sections indicated in the table are advised for a maximum length
of 50 m.
For higher lengths or different types of cable installation, it will be the
DESIGNERS responsibility to carefully measure the line main switch, the
supply power line and the earthing protection connection, and the working
connection cables:
−
the length
−
the type of cable
−
Absorption of the unit and its physical position, and room temperature.
WARNING
Check that all power cables are correctly secured to the terminals when
switched on for the first time and after 30 days of use. Afterwards,
check the connection of the power cables every six months.
Slack terminals could cause the cables and components to overheat.
All electrical operations must be carried out by qualified personnel, in
accordance with the corresponding regulations, trained and informed
about the risks related to such operations.
The characteristics of electric lines and related components must be
established by personnel authorised to design electric installations,
following international regulations and the national regulations of the
country in which the unit is installed, in compliance with the legislative
regulations in force at the moment of installation.
For installation requirements, the wiring layout supplied with the unit
must be compulsory referred to. The wiring layout together with the
manuals must be kept in good conditions and readily accessible for future
operations on the unit.
it is compulsory to check the machine sealing before connecting the
electrical wirings. The machine should only be powered once the
hydraulic and electric operations are completed.
