machine power cable must always be connected
to the protection conductor (system earth). The
yellow-green wire should NEVER be combined
with another phase wire for a voltage withdrawal.
Do not touch live parts.
Gas hose connection
ATTENTION: Cylinders can explode if damaged!!!
- Keep the cylinders upright and chained to the ap-
propriate support.
- Keep the cylinders in a place where they cannot
be damaged accidentally.
- Do not lift the machine with the cylinder attached.
- Never touch the cylinder with the welding wire.
- Keep the cylinder away from the welding area or
from non-insulated electrical circuits.
The inert gas cylinder must be equipped with a pres-
sure reducer and possibly also a flow meter. Only af-
ter having correctly positioned the cylinder, connect
the gas hose, exiting from the rear of the machine, to
the pressure reducer. Next you can open the cylinder
and adjust the pressure reducer.
4.10. PRELIMINARY CHECKS
It is necessary to carry out the following operations
before each machine start-up:
• Check all the safety systems;
• Check protection and signs.
Before putting the machine into operation, a number
of checks and controls must be carried out in order to
prevent errors or accidents during the Start-up phase:
• Check that the machine has not been damaged
during assembly;
• Verify, with particular care, the integrity of the
electrical panels, control panels, electrical wiring
and tubing;
• Check the exact connection of all external power
sources;
• Check the free movement and free rotation of all
moving parts;
• Check that hydraulic and pneumatic connections
are tight so that they do not cause dangerous
leakage.
4.9. CONNECTIONS
Electrical connections
The machine's internal connections are carried out
by qualified personnel sent by the manufacturer. The
electrical connection between the machine panel
and the customer's power distribution supply line
must be carried out by qualified personnel from the
Customer.
IMPORTANT: The personnel qualified to carry out
the electrical connection must make sure of the
perfect efficiency of the earthing of the electrical
system and must check that the line voltage and
the frequency correspond to the data shown on
the identification plate. Incorrect supply voltages
can cause serious damage to the system.
If the system is set to operate at single-phase 230 V at
50-60 Hz, wire the end of the power cable to an EEC
plug with the same capacity as the socket on the line
switch as per the following diagram:
SINGLE-PHASE connections
Wire colour
Connection
Brown
Phase
Blue
Neutral
Yellow/Green
Earth
If the system is set to operate at three-phase 400 V at
50-60 Hz, wire the end of the power cable to an EEC
plug with the same capacity as the socket on the line
switch as per the following diagram:
THREE-PHASE connections
Wire colour
Connection
Black
"R" phase
Brown
"S" phase
Blue/Grey
"T" phase
Yellow/Green
Earth
ATTENTION: Make sure the system line switch is
in the "0" position before connecting the power
cable.
ATTENTION: It is mandatory to install a circuit
breaker with interlocked CEE socket, of adequate
capacity and verifying that the earth socket is ef-
ficient and separate from the rest of the electrical
system of the working environment.
ATTENTION: the yellow-green wire of the welding
1.995.234 EN - Rev. 1.1
NOVAMIG 320 LCD
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