8 - EN
EN
NLC_A cod: 1606.4037360_00
8.
ELECTRICAL WIRINGS
The NLC units are fully wired in the factory and only
require connection
to the electrical mains and the wiring of the flow switch (see the wiring
diagram supplied)
, downstream of a unit switch, as provided for by the reg-
ulations in force in the country of installation.
It is also suggested to check:
1. the characteristics of the electrical network are suitable for the ab-
sorptions indicated in the electric data table. The unit should only be
powered when the installation work has finished (hydraulic and elec-
tric).
2. Respect the connection indications of the phase and earth wires.
3. The power supply line will have a relevant protection upstream against
short circuits and dispersions to earth that isolate the system with re-
spect to other utilities.
4. The voltage must be within a tolerance of ± 10% of the nominal power
supply voltage of the machine (for unbalanced three-phase unit max
3% between the phases). If these parameters are not respected, con-
tact the energy supplier.
5. For electrical wirings use isolated double cables according to the
standards in force in the different countries.
MANDATORY
1. It is necessary to use a omnipolar thermomagnetic switch, in compli-
ance 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.
2. It is necessary to carry out an efficient earth connection. The manufac-
turer can not be held responsible for any damage caused by the lack or
ineffective earthing of the appliance.
3. For units with three-phase power supply check the correct connection
of the phases.
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 DE-
SIGNERS responsibility to carefully measure the line main switch, the supply
power line and the earthing protection connection, and the working con-
nection cables:
•
the length
•
the type of cable
•
Absorption of the unit and its physical position, and room tempera-
ture.
CONNECTION OF THE POWER SUPPLY TO THE MAINS
Before connecting the unit to the power supply mains, make sure that the
isolating switch is open.
Open the front panel.
Use the holes in the bottom part of the framework for the main electric
power supply cable and for the cables of the other external connections
under the responsibility of the installer.
It is prohibited to access positions with electric cables not specifically
indicated in this manual.
Avoid direct contact with the non-insulated copper piping and with the
compressor.
Provide electrical connection as per wiring diagram supplied with the unit.
Put back the inspection panels.
Make sure that all the protections removed for the electrical connection
are put back before powering up the unit.
Set the master switch (on the outside of the appliance) to “ON”.
WARNING
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, refer to the wiring diagram supplied with
the unit. The wiring diagram 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 wiring. The machine should only be powered once the hydraulic
and electric operations are completed.
It is forbidden to use the water pipes to earth the appliance.
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
them every six months.
Slack terminals could cause the cables and components to overheat.
WARNING
Before carrying out any work, make sure the
electricity supply is unplugged.
B
B
A
A
Condensate discharge pipe
Electrical cables inlet
The condensate discharge
tubes are supplied with the
unit, and must be screwed to
the two fittings mounted on
the tray.
The voltage should be within a tolerance of ± 10%
of the rated supply voltage of the machine (for
unbalanced three-phase units max 3% between
the phases).
WIRING OF THE FLOW SWITCH IN THE ELECTRICAL PANEL
Connect the flow switch (accessory) to the J5 terminal board of
the pCO5+ electronic regulation (refere to the wiring diagram
supplied).
