IOM SYSCREW 300 1400 AIR CO

17
English
4 - Installation (continued)
4.6 Power supply
DANGER
Before carrying out any operations on the
electrical system, make sure that the unit is
deenergised.
DANGER
It is important that the appliance is grounded.
DANGER
The company in charge of the installation shall
conform to the standards applicable to outdoor
electrical connections.
The manufacturer 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:
n A 3-phase and grounding connection for the power supply
circuit.
n The electrical distribution system shall meet the power absorbed
by the appliance.
n The disconnecting and magnetothermal switches must be sized to
control the starting current of the unit.
n The power supply lines and the insulation devices must be
designed in such a way that every line independent.
n It is recommended to install differential switches, to prevent any
damage caused by phase drops.
n The fans and compressors are supplied through contactors
controlled from the control panel.
n Each motor is provided with an internal safety thermal device
and external fuses.
n 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 2006/42/EC, Electromagnetic Compatibility Directive
2014/30/EU 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 provided in this manual.
The power supply lines must consist of insulated copper
conductors, dimensioned for the maximum absorbed current.
Connection to terminals must be performed according to the diagram
of connections (User’s Terminal Box) provided in this manual and
according to the wiring diagram which accompanies the unit.
WARNING
Before connecting the power supply lines, check
that the available voltage value does not exceed
the range specified in the Electric 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 voltage of each phase couple and their mean
value during operation.
The maximum % value of these differences (unbalance) must not
exceed 2% of the mean voltage.
If the unbalance is unacceptable, contact the Energy Distributor to
solve this problem.
WARNING
Supplying the unit through a line whose
unbalance exceeds the permissible value will
automatically void the warranty.