CO
2
NNEXT
rev.01
EN
87 / 293
4.4.1.
Power and control electrical panel and electrical connection
DANGER: The electrical connection operations must be carried out by qualified personnel who meet
the necessary technical requirements established by the country in which the machine is installed.
ATTENTION: The Manufacturer declines all responsibility deriving from non-observance of the
indications below.
ATTENTION: It is mandatory, by law, to connect the machine to an efficient earthing system. No
responsibility is accepted for failure to comply with this provision and if the electrical system to
which connection is made is not built according to the regulations in force.
ATTENTION: Check the power supply phases to obtain correct rotation direction of the compressors.
Incorrect rotation can irreparably damage the compressors themselves.
The power supply provided by the purchaser (voltage, phases and frequency) must be correct and sufficient
to adequately power the partly-completed machine. Specifically, it is necessary to adopt the following
indications:
x
If envisaged by the type of configuration of the partly-completed machine, install a differential
thermal magnetic circuit breaker between the power supply line and the door lock switch of the
electrical equipment installed on the machine. This switch must be adequately sized to the
application and to the laws in force in the country of installation. Make sure that the supply voltage is
the same as that shown on the plate and wiring diagram of the partly-completed machine; the
permissible tolerance is ±10% of the rated voltage. In case of presence on the machine of user
devices that generate earth fault currents with high continuous and/or high frequency components
(inverter, UPS, etc.), use a class differential thermal breaker suitable for use with such non-linear
circuits.
ATTENTION: The differential thermal magnetic circuit breaker must be placed in the immediate
vicinity of the partly-completed machine (but outside the safety area) so that it can be clearly
visible and reachable by the technician in case of maintenance.
x
The section of the power supply cable must be adequate for the power absorbed by the partly-
completed machine. For further information on the total absorption of the partly-completed machine,
refer to the wiring diagram attached to this manual.
x
The power supply cable must have construction characteristics that are suitable to the conditions of
the installation site of the machine.
The partly-completed machine is equipped with an electrical panel for power and control. In general it has
the following functions:
x
general switch with door lock;
x
magnetothermal protection of all loads;
x
electronic control terminal;
x
compressors protected by magnetothermal switches;
x
power transformer for control circuits;
x
management of the maximum (and optional minimum) pressure switches each according to its functionality.
In the electrical panel there is a customized electronic controller with different functions:
x
regulation with pressure or temperature probe;
x
compressors operation management
x
control of the work area ofthe compressors;
x
alarms management;
x
oil management;
x
management of the low temperature system (if any.).
