
33
12.0 SUMMARY
OF
CAUTIONS
12.1 SHOCK
PREVENTION
Always disconnect the AC power plug before removing the panels of the
Controller to avoid electrical shock and the possibility of shorting or grounding the
electrical circuitry.
Always disconnect primary power to the power source before removing panels.
Do not remove panels from the power source until the maintenance manual has
been read and fully understood, as there may be lethal voltage present even
after the primary power is disconnected. Heed all installation instructions and
warnings given in the Power Source Manual.
12.2
SAFETY AND HEALTH PRECAUTIONS
Breathing the fumes created during welding can cause illness or death. Provide
adequate ventilation in accordance with ANSI Standard Z49.1.
A MIG (GMAW/FCAW) arc emits intense infrared and ultraviolet radiation which
can cause permanent eye damage without adequate protection. We recommend
a #10 eye shield or darker. Arc radiation can penetrate light clothing and cause
sunburn. Use suitable work clothes and use a sunscreen compound on exposed
skin.
12.3 CHECK
ELECTRICAL
CONNECTIONS
Be sure that all external electrical connections are clean and tight. In particular,
the ground-to-work clamp must make a good electrical contact to assure
minimum voltage drop. Adhere to the power source manufacturer's grounding
recommendations. Check for gas and water leaks immediately following cable
hook-up before system is first operated.
12.4
PREVENT TORCH CABLE WRAP-UP
Do not allow the umbilical to "hawser" on the pipe while welding. Keep the
number of turns wrapped around the pipe to a minimum by pre-winding if
possible. Preventing the Head from rotating may result in damage to the tractor
motor or other mechanical assemblies. Prevent the cables from contacting a hot
or preheated pipe.
12.5. OBSERVE TORCH POSITION BEFORE OSCILLATING OR "CENTERING"
TORCH
Do not set oscillation to an amplitude which will cause the gas nozzle or torch
body to contact the work. The sudden impact of the torch against the pipe can
W
W
A
A
R
R
N
N
I
I
N
N
G
G
NEVER operate the Pipeliner Head with the MPS Power Supply
Switch to Stick Electrode (SMAW) or GTAW modes. Open circuit
voltage will be present on the torch at all times. Touch the Torch
and a grounded workpiece will result in an electrical shock.
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