Praxair SELECT-400, Operating Instructions Manual

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SELECT-400/600
GENERAL OBSERVATIONS
This manual has been written for users who are familiar with the installation, operation and maintenance of welding
machines.
The instructions contained in this manual should be carefully followed in order to avoid problems and to achieve optimum
results from the equipment
RECEPTION AND INSPECTION
Before installing the SELECT 400/600 , check that all parts are in perfect condition. If you should observe any irregularity, inform
your supplier.
The unit is packed in a plastic cover and is strapped to a wooden base with an outer cardboard packing box. To unpack
the unit do not use any tools that could scratch the frame or damage the cables. Do not throw the packing material away
until you have checked that the machine is operating correctly.
You should receive:
•
SELECT –400/600 unit with mains cable and gas hose
•
Ground wire with rapid connector and earth clamp.
•
Instructions Manual.
•
Guarantee Card.
Inform your supplier, should any of these parts be missing ..
INSTALLATION
To connect the machine to the power supply, ensure that there is a fused line switch or breaker. The switch should be open
when the connection is made and the fuses removed. The machine’s power output refers to a correct supply voltage, if this
is lower, the machine will not operate at full capacity.
The power cable has a cable to connect the machine to a good earth; check that the earth for this circuit is correct; ensure
that the cables are securely tightened at the connections and that the recommended fuses are used.
Ensure that the machine is positioned to allow the free circulation of the cooling air, for both the front and back of the
machine; do not place obstacles at a distance of less than 50 cm from the front and rear panels.
Check that the ventilator is not receiving excessively dirty or dusty air.
Do not use different connectors to the ones supplied. Both the connectors as well as the cables are designed to support the
maximum current for the machine.
MAINTENANCE AND REPAIR
Before making any internal inspection, make sure that the machine is disconnected from the mains, and the fuses have
been removed.
The machine switch does not disconnect the power from the main transformer primary windings.
TRANSFORMER (TP)
We would recommend cleaning this periodically. The time interval depends on the type of environment but, as a rule, it
should be cleaned once every six months. Remove the machine cover and the side panels and blow with dry compressed
air at a low pressure (max 4 bar).
RECTIFIER (PR)
It simply requires blowing with low pressure air. Check that the rectifier input and output terminals are tight.
VENTILATOR (MV)
The ventilator is permanently lubricated and does not require maintenance.
TORCH
Always keep the nozzle clean and remove any remains of spatter between the tip and welding wire; this will considerably
lengthen the torch life. Once the nozzle has been cleaned, spray it with
PROTARGON , an anti-spatter product from
PRAXAIR SOLDADURA S.L. code 245.901.5. This will prevent small drops of molten metal from sticking again. Do not bang the
torch against the parts to be welded or other objects, particularly at high temperatures; if you do so, the torch will be
rendered unusable.