16
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The features of the lines must be determined by personnel
enabled to the designing of electric systems, complying with
the standards in force.
The protective equipment of the unit supply line must be able
to shut-off the presumed short circuit current, which value
must be determined in accordance with the system features.
The section of the power supply cables and of the protective
cable must be determined in accordance with the features of
the used protections.
All electrical operations must be carried out by personnel
having the legal requisites, trained on the risks related to
these operations.
Work respecting the current safety standards.
6.1 Preliminary information
F.L.A. Full load ampere
absorbed current at maximum admitted conditions
F.L.I. Full load input
Power absorbed with full load
(at maximum admitted conditions)
Matriculation
plate
VOLTAGE
FLA (A)
FLI (kW)
The matriculation plate shows the electric data specific of the
unit, including any electric accessories.
The electric data indicated in the technical schedule and in the
manual refer to the standard unit, excluding accessories.
Refer to the data reported in the matriculation plate.
6.2 Electric data
6.3 Connections
Refer to the wiring diagram of the unit (the number of the
wiring diagram is indicated in the matriculation plate)
Check the mains have features conform with the data reported
on the matriculation plate
Before starting work, check the isolation device at unit power
supply line start is open, blocked and provided with sign
First carry out the earth connection
Protect the cables using adequately sized cable glands
Before electrically powering the unit, ensure all protections
removed during electric connection are restored.
6.4 Data-signal lines
Do not exceed the maximum admitted distance, that varies
based on the type of cable and signal.
Lay the cables away from the power lines, with different
voltage, or that emit interferences of electromagnetic origin.
Avoid laying the cables near the equipment that can create
electromagnetic interferences.
Avoid laying in parallel with other cables, any intersection with
other cables is admitted only if at 90°C.
The screen must be connected to earth without interferences.
Guarantee screen continuity for the entire extension of the
cable.
Respect the indications on impedance, capacity, attenuation.
6 - ELECTRIC CONNECTIONS
!
Remove the cover of the terminal block on the electric motor,
and check that the connections of the terminals conform to the
power supply voltage.
Note that the air handling units are supplied as follows:
STANDARD motor, single polarity up to 4kW:
Motor with direct starting, 230/400V
230V delta, 400V star
N.B.: The 230/400 motors may have a star/delta connection
only where 230V three-phase power is available.
STANDARD motor, single polarity above 4kW:
Motor with 400V star/delta starting
400V delta, 690V star
Connect the line cable to the terminal block, including the
earth connection, in accordance with the EC standards; refer
to the table "Motor electrical data".
The hole to be made for the passage of the cable through the
casing of the unit, in the position chosen by the customer-
installer, must be fitted with a suitable cable gland.
The cables inside the fan section must be carefully fastened
to the structure, as they are in the fan intake air flow.
The motor power supply must be protected by fuses, and the
power input of the motor must be controlled by a thermal
overload device, suitably calibrated for the rating of the
motor. Please refer to the table "Motor electrical data".
To prevent moisture forming in the terminal block, check that
the gasket is fitted in its housing and correctly fastened by the
cover.
As regards the starting time, refer to the table "Starting times".
6.5 Electric motor connection
For the grounding connection use the 6.8 mm holes
present on the base
!
