AERMEC NRL 0280 FE, Руководство по установке и обслуживанию

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20
EN
12. ELECTRICAL WIRINGS
The default NRL chillers are completely wired and
only need the connection to the power supply net,
downstream to a group switch, according to the 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 suita-
ble 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 line will have a special protection upstre-
am 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 thermomagne-
tic 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 connec-
tion. 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.
12.1. 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 installa -
tion, it will be the DESIGNERS responsibility to carefully
measure the line main switch, the supply power line
and the earthing protection connection, and the wor-
king 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.
ATTENTION
All electrical operations must be
carried out by qualified personnel,
in accordance with the corre-
sponding regulations, trained and
informed about the risks related to
such operations.
ATTENTION
The characteristics of electric lines
and related components must be
established by personnel authori-
sed 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.
ATTENTION
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.
ATTENTION
it is compulsory to check the
machine sealing before connecting
the electrical wiring. The machine
should only be powered once the
hydraulic and electric operations
are completed.
NOTE
Field wiring by others which
complies to the National
Electrical Code & Local Codes.
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