Page 17
English
Installation
The company in charge of the installation
shall conform to the standards applicable to
outdoor electrical connections.
Itelco-Clima may not be held liable for any damage
and/or injury caused by failure to comply with these
precautions.
The unit conforms to EN 60204-1.
The following connections shall be provided:
h
A 3-phase and grounding connection for the pow-
er supply circuit.
h
The electrical distribution system shall meet the
power absorbed by the appliance.
h
The disconnecting and magnetothermal switches
must be sized to control the starting current of the
unit.
h
The power supply lines and the insulation devices
must be designed in such a way that every line in-
dependent.
h
It is recommended to install differential switches,
to prevent any damage caused by phase drops.
h
The fans and compressors are supplied through
contactors controlled from the control panel.
h
Each motor is provided with an internal safety
thermal device and external fuses.
h
The power supply cables must be inserted into
dedicated openings on the front of the unit, and
the will enter the electrical board through holes
drilled on the bottom of the board.
4.7 Electrical connections
The unit must be installed on site according to the
Machinery Directive (98/37/EC), the Low Voltage Di-
rective (73/23/EC), the Electromagnetic Interference
Directive (89/336/EC) and the usual procedures and
standards applicable in the place of installation. The
unit must not be operated if its installation has not
been carried out according to the instructions provid-
ed in this manual.
The power supply lines must consist of insulated cop-
per conductors, dimensioned for the maximum ab-
sorbed current.
Connection to terminals must be performed accord-
ing to the diagram of connections provided in this
manual and according to the wiring diagram which
accompanies the unit.
Before connecting the power supply lines,
check that the available voltage value does
not exceed the range specified in the Elec-
tric Data (Chapter 8).
For 3-phase systems, check also that the unbalance
between the phases does not exceed 2%. To perform
this check, measure the differences between the volt-
age of each phase couple and their mean value dur-
ing operation. The maximum % value of these differ-
ences (unbalance) must not exceed 2% of the mean
voltage. If the unbalance is unacceptable, contact
the Energy Distributor to solve this problem.
Supplying the unit through a line whose un-
balance exceeds the permissible value will
automatically void the warranty.
Manuale CLS-CLH1 7.2.2005 10:17 Pagina 17
