WIA CP144-1, Operator'S Manual

Page: 13 / 36

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Successful operation
Successful operation will depend on a
number of factors:
– Variation in circuit breaker thresholds.
– Ambient temperature.
– Number of previous circuit breaker
operations.
– Actual weld conditions, resulting in
higher weld currents.
– Repeated starts can result in
repeated in-rush currents raising
circuit breaker threshold.
Repeated circuit breaker operation at weld
start can sometimes be overcome by using
a “D” curve circuit breaker.
To reduce nuisance tripping, a higher
rated circuit breaker can be selected, but
the supply circuit wiring capacity must be
increased to suit.
Supply Cable
If it becomes necessary to replace the
mains flexible supply cable, use only cable
with correct current rating.
The replacement cable must be fitted and
retained in the same manner as the original.
Output Voltage Polarity
The design of the Weldmatic allows
selection of the output voltage polarity.
Positive Wire
MIG welding (GMAW), with solid
consumable wires and gas shielding, is
carried out with the work piece Negative
and the welding wire Positive.
To setup for this condition, connect the
‘WORK’ lead plug into the (-) output terminal
on the power source, and the wirefeeder
weld cable into the (+) output terminal.
Negative Wire
Some ‘self-shielded’ flux cored gasless
consumable wires are operated with the
work piece Positive and the consumable
wire Negative. Refer to the manufacturers
data for the particular consumable wire to
be used.
To setup for this condition, connect the
‘WORK’ lead plug into the (+) output terminal
on the power source, and the wirefeeder
weld cable into the (-) output terminal.
Fitting the Gas Cylinder
Place the gas cylinder on the tray at the
rear of the optional welder trolley (if using).
Retain the cylinder with the chain provided.
Fit the gas regulator to the cylinder. DO NOT
apply grease or oil to these joints.
Fit the end of the gas inlet hose from the
back of the power source to the connector
supplied with the gas regulator, and secure
with the clamp also supplied.