Installation And Operator Instructions - Lincoln Electric INVERTEC 270SX Service Manual

SAFETY MARK: This equipment is suitable for supplying power for welding operations carried out
in an environment with increased hazard of electric shock.
EQUIPMENT WEIGHT OVER 30kg: Move this equipment with care and with the help of another
person. Lifting may be dangerous for your physical health.
CYLINDER MAY EXPLODE IF DAMAGED: Use only compressed gas cylinders containing the
correct shielding gas for the process used and properly operating regulators designed for the gas and
pressure used. Always keep cylinders in an upright position securely chained to a fixed support. Do
not move or transport gas cylinders with the protection cap removed. Do not allow the electrode,
electrode holder, work clamp or any other electrically live part to touch a gas cylinder. Gas cylinders
must be located away from areas where they may be subjected to physical damage or the welding
process including sparks and heat sources.
CAUTION: The high frequency used for contact-free ignition with TIG (GTAW) welding, can
HF
interfere with the operation of insufficiently shielded computer equipment, EDP centers and
industrial robots, even causing complete system breakdown. TIG (GTAW) welding may interfere
with electronic telephone networks and with radio and TV reception.

Installation and Operator Instructions

Read this entire section before installation or operation of the
machine.
Location and Environment
This machine can operate in harsh environments. However,
it is important that simple preventative measures are
followed to assure long life and reliable operation:
•
Do not place or operate this machine on a surface with
an incline greater than 15° from horizontal.
•
Do not use this machine for pipe thawing.
•
This machine must be located where there is free
circulation of clean air without restrictions for air
movement to and from the air vents. Do not cover the
machine with paper, cloth or rags when switched on.
•
Dirt and dust that can be drawn into the machine should
be kept to a minimum.
•
This machine has a protection rating of:
•
270SX: IP23
•
400SX: IP23
Keep it dry when possible and do not place it on wet
ground or in puddles.
•
Locate the machine away from radio controlled
machinery. Normal operation may adversely affect the
operation of nearby radio controlled machinery, which
may result in injury or equipment damage. Read the
section on electromagnetic compatibility in this manual.
•
Do not operate in areas with an ambient temperature
greater than 40°C.
Input Supply Connection
Check the input voltage, phase, and frequency supplied to
this machine before turning it on. The allowable input
voltage is indicated in the technical specification section of
this manual and on the rating plate of the machine. Be sure
that the machine is grounded.
Make sure the power available at the input connection is
adequate for normal operation of the machine. The fuse
rating and cable sizes are both indicated in the technical
specification section of this manual.
Input Supply From Engine Driven Generators
The machines are designed to operate on engine driven
generators as long as the auxiliary can supply adequate
voltage, frequency and power as indicated in the "Technical
Specification" section of this manual. The auxiliary supply of
the generator must also meet the following conditions:
•
Vac peak voltage: below 670V.
•
Vac frequency: in the range of 50 and 60Hz.
•
RMS voltage of the AC waveform: 400Vac ± 15%.
It is important to check these conditions because many
engine driven generators produce high voltage spikes.
Operation of this machine with engine driven generators not
conforming to these conditions is not recommended and may
damage the machine.
Output Connections
A quick disconnect system using Twist-Mate
used for the welding cable connections. Refer to the
following sections for more information on connecting the
machine for operation of stick welding (MMA) or TIG welding.
•
(+) Positive Quick Disconnect: Positive output
connector for the welding circuit.
•
(-) Negative Quick Disconnect: Negative output
connector for the welding circuit.
Stick Welding (MMA)
First determine the proper electrode polarity for the electrode
to be used. Consult the electrode data for this information.
Then connect the output cables to the output terminals of the
machine for the selected
connection method for DC(+) welding.
Connect the electrode cable to the (+) terminal and the work
clamp to the (-) terminal. Insert the connector with the key
lining up with the keyway and rotate approximately ¼ turn
clockwise. Do not over tighten.
For DC(-) welding, switch the cable connections at the
machine so that the electrode cable is connected to (-) and
the work clamp is connected to (+).
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