16
21.05 - 6068956_00
NXP 0500 - 1650 2-PIPE SYSTEM / 4-PIPE SYSTEM
EN
The units are completely wired at the factory and only
require connecti on to the electrical mains, downstream
from a unit switch, according to that envisioned by
the Standards in force on this subject in the country of
installation.
It Is also advised to check that:
1.
The electrical mains features are suitable for the
input values indicated in the electrical data table,
also taking any other machines operating at the
same time into consideration.
2.
The unit must only be powered when installation
has been completed (hydraulic and electric).
3.
Respect the connection indications of the phase
and earth wires.
4.
The power supply line must have a relevant protec-
tion against short circuits mounted upstream and
dispersions to earth, which isolate the system with
respect to other utilities.
5.
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). Whenever these parameters are
not respected, contact the electric energy public
body.
6.
For electric connections, use the cables with dou-
ble isolation according to the Standards in force on
this subject in the different countries.
THE FOLLOWING ARE MANDATORY
1.
The use of an omnipolar magnet circuit breaker
switch is mandatory, in compliance with the IEC-EN
Standards (contact opening at least 3 mm), with
suitable cut-off power and differential protection
on the basis of the electric data table shown below,
installed as near as possible to the appliance.
2.
It is mandatory to make an effective earth connec-
tion. The manufacturer is not liable for any damage
caused by the lack of or ineffective appliance earth
connection.
3.
For units with three-phase power supply, check the
correct connection of the phases.
4.
It is mandatory to verify that the machine is water-
ti ght before making the electrical connecti ons and
it must only be powered a� er the hydraulic and
electrical works have been completed.
All the electrical operati ons must be carried out by
STAFF
IN POSSESSION OF THE NECESSARY QUALIFICATIONS
BY LAW,
suitably trained and informed on the risks related
to these operati ons.
The features of the electrical lines and of the related
components must be determined by
STAFF QUALIFIED
TO DESIGN ELECTRICAL SYSTEMS,
in compliance with
the internati onal and nati onal regulati ons of the place of
installati on of the unit and in compliance with the regula-
ti ons in force at the ti me of installati on.
For the installati on requirements refer only to the wiring
diagram supplied with the appliance.
THE WIRING DIAGRAM ALONG WITH THE MANUALS
MUST BE KEPT IN GOOD CONDITION AND ALWAYS
BE AVAILABLE FOR ANY FUTURE INTERVENTIONS ON
THE UNIT.
ATTENTION
1. It is prohibited to use the water pipes to earth the
appliance.
2.
Check the tightening of all power wire clamps on
commissioning and after 30 days from start-up.
Successively check them every six months.
Loose terminals can cause overheating of the
cables and components.
ELECTRIC CONNECTIONS
1.
Before connecti ng the unit to the power supply mains,
make sure that the isolati ng switch is open.
2.
Open the front panel.
3.
Use the plates to pass the main electric power supply
cable and the cables of the other
external connecti ons under the responsibility of
the installer.
4.
It is prohibited to access positi ons not specifi cally envi-
sioned in this manual with electric cables.
5.
Avoid direct contact with non-insulated copper
piping and with the compressor.
6.
Identi fy the clamps for the electric connecti on
and always refer exclusively to the wiring dia-
gram supplied with the unit.
7.
For the functi onal connecti on of the unit, take
the power supply cable to the electric control
board inside the unit and connect it to clamps.
L1-L2-L3 and PE respecti ng the polariti es.
L1-L2-L3 as phases, and PE as earth;
8.
Re-positi on the inspecti on panels.
9.
Ensure that all protecti ons removed for the
electric connecti on have been restored before
powering the unit electrically.
10.
Positi on the system master switch (outside the
appliance) at “ON”.
1. ELECTRIC POWER CONNECTION TO THE ELECTRICAL MAINS
ON
OFF
Holes for passage of electric cables
Master Switch ON/OFF
Restoring the
protection degree of
the electrical box by
the installer
9. ELECTRIC CONNECTIONS
