Fire Prevention; Explosion Prevention - Lincoln Electric SPIRIT II 150 Technical Manual

Spirit II User's Manual
• Never change torch consumable parts unless the system is switched off at the wall
disconnect.
• Do not attempt to remove any parts from beneath the torch when cutting.
Remember that the workpiece forms the current path back to the power supply.
• Never bypass the safety interlock devices.
• Before removing any of the covers, switch the system off at the wall disconnect.
Wait at least five (5) minutes before removing any cover.
capacitors inside the unit time to discharge. See Section 6 for additional safety
precautions.
• Never operate the system without all of the covers in place. See Section 6 for
additional safety precautions.
• Preventive maintenance should be performed daily to avoid possible safety hazards.

Fire Prevention

When using the Spirit system, it is necessary to exercise good judgment. While cutting,
the arc produces sparks that could cause a fire if they fall on flammable materials.
Make sure that all flammable materials are a suitable distance away from the cutting
area. All flammable liquids should be at least 40 feet away from the cutting area,
preferably stored in a metal cabinet. Plasma cutting should never be attempted on
containers that contain flammable materials. Make sure that fire extinguishers are
readily accessible in the cutting area.
Make sure that the cutting area is properly ventilated when using oxygen as a cutting
gas.

Explosion Prevention

The Spirit system uses compressed gases. Use proper techniques when handling
compressed gas cylinders and other compressed gas equipment.
following guidelines to protect against explosion:
• The combination of Preflow/Postflow, Plasma and Shield input gases should always
adhere to the types specified in the cut charts for a given material type.
• When changing to a different type of gas (oxidizing or oxygen containing to
combustible or vice versa), a purge of the gas lines (30 second minimum) must be
completed to reduce the risk of fire or explosion.
• Do not connect H17 (combustible gas) to the gas inputs (Pre/Postflow, Plasma, or
Shield) at the same time as Oxygen or Air.
This information is subject to the controls of the Export Administration Regulations [EAR]. This information shall not be provided to
non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
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Section 1: Safety
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