25
Aermec cod. INRLLSIY 13_01. 4086991_00
NRL 800 - 1800
GB
11. 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
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 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 re-
sponsible for any damage caused by the failure and
ineffective earthing of the machine.
• For units with Three-phase power check the cor-
rect connection of the phases.
WARNING
It is forbidden to use water pipes for the earthing of
the machine.
11.1.
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 instal-
lation, it will be the DESIGNERS responsibility to care-
fully 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. Af-
terwards, 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 corresponding regula-
tions, trained and informed
about the risks related to such
operations.
ATTENTION
The characteristics of electric
lines and related compo-
nents 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 in-
stalled, 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 condi-
tions and readily accessible for
future operations on the unit.
ATTENTION
it is compulsory to check the
machine sealing before con-
necting the electrical wiring.
The machine should only be
powered once the hydraulic
and electric operations are
completed.
