Xnexus NXT200 AC/DC, Instruction Manual

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Instruction manual NXT200/250 AC/DC page 4
INITIAL OPERATION
Mains connection
The machine should be connected to a mains supply
and must be correctly earthed. After the mains plug
has been connected to the mains the machine is
ready for use. Please note that all cable connections
must be made by authorised and qualified staff.
Switch on and off the machine by means of the
breaker on the rear of the machine.
Configuration
The manufacturer and supplier disclaim all
responsibility for any damage caused or related to
welding with undersized welding torches and/or
welding cables. If in doubt contact your NEXUS
distributor for recommended sizes and types.
Gas connection
Connect the machine to the gas system by means of
a gas regulator with flow control. Fit and secure the
gas hose to the gas connection on the rear of the
machine
Important!
In order to avoid damage to
plugs and cables, good electric
contact is required when
connecting earth cable and
welding torch to the machine.
Connection of welding cables
Connect the welding cables and the return current
cable to the front of the machine.
Please note that the plug must be turned 45 degrees
after insertion into the socket - otherwise the plug
can be damaged due to excessive contact
resistance.
Connect always the TIG connection in the minus (-)
socket and the return current cable in the plus (+)
socket.
The control signals from the TIG torch are trans-
formed to the machine through the circularly 7-pin
plug. When the plug has been assembled please
secure it by turning the "circulator" clockwise.
Connect the gas hose to the quick connection.
COATED ELECTRODES: Electrodes are marked
with a polarity on the packing. Connect the electrode
holder in accordance with this marking to the plus or
minus sockets of the machine.
Connection of remote control
Connect the remote control unit on the 7-ways plug
in the front of the machine. (OPTIONAL)
Usage of the machine
When welding, a heating of various components of
the machine takes place and during breaks these
components will cool down again. It must be ensured
that the air flow is not reduced or stopped.
When the machine is set for higher welding currents,
there will be a need for periods during which the
machine can cool down.
The length of these periods depends on the current
setting, and the machine should not be switched off
in the meantime. If the periods for cooling down
during use of the machine are not sufficiently long,
the overheating protection will automatically stop the
welding process and the yellow LED in the front
panel will come on. The yellow LED switches off
when the machine has cooled down sufficiently and
is ready for welding.