Miller Invision 456P, Owner'S Manual

OM-2232 Page 1

SECTION 1 

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 SAFETY PRECAUTIONS - READ BEFORE USING

som _3/05

Y

Warning: Protect yourself and others from injury — read and follow these precautions.

1-1. Symbol Usage

Means Warning! Watch Out! There are possible hazards

with this procedure! The possible hazards are shown in

the adjoining symbols.

Y

Marks a special safety message.

.

Means “Note”; not safety related.

This group of symbols means Warning! Watch Out! possible

ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.

Consult symbols and related instructions below for necessary actions

to avoid the hazards.

1-2. Arc Welding Hazards

Y

The symbols shown below are used throughout this manual to

call attention to and identify possible hazards. When you see

the symbol, watch out, and follow the related instructions to

avoid the hazard. The safety information given below is only

a summary of the more complete safety information found in

the Safety Standards listed in Section 1-5. Read and follow all

Safety Standards.

Y

Only qualified persons should install, operate, maintain, and

repair this unit.

Y

During operation, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

Touching live electrical parts can cause fatal shocks

or  severe burns. The electrode and work circuit is

electrically live whenever the output is on. The input

power circuit and machine internal circuits are also

live when power is on. In semiautomatic or automatic wire welding, the

wire, wire reel, drive roll housing, and all metal parts touching the

welding wire are electrically live. Incorrectly installed or improperly

grounded equipment is a hazard.

D

Do not touch live electrical parts.

D

Wear dry, hole-free insulating gloves and body protection.

D

Insulate yourself from work and ground using dry insulating mats

or covers big enough to prevent any physical contact with the work

or ground.

D

Do not use AC output in damp areas, if movement is confined, or if

there is a danger of falling.

D

Use AC output ONLY if required for the welding process.

D

If AC output is required, use remote output control if present on

unit.

D

Additional safety precautions are required when any of the follow-

ing electrically hazardous conditions are present: in damp

locations or while wearing wet clothing; on metal structures such

as floors, gratings, or scaffolds; when in cramped positions such

as sitting, kneeling, or lying; or when there is a high risk of unavoid-

able or accidental contact with the workpiece or ground. For these

conditions, use the following equipment in order presented: 1) a

semiautomatic DC constant voltage (wire) welder, 2) a DC manual

(stick) welder, or 3) an AC welder with reduced open-circuit volt-

age. In most situations, use of a DC, constant voltage wire welder

is recommended. And, do not work alone!

D

Disconnect input power or stop engine before installing or

servicing this equipment. Lockout/tagout input power according to

OSHA 29 CFR 1910.147 (see Safety Standards).

D

Properly install and ground this equipment according to its

Owner’s Manual and national, state, and local codes.

D

Always verify the supply ground 

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 check and be sure that input

power cord ground wire is properly connected to ground terminal in

disconnect box or that cord plug is connected to a properly

grounded receptacle outlet.

D

When making input connections, attach proper grounding conduc-

tor first 

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 double-check connections.

D

Frequently inspect input power cord for damage or bare wiring 

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replace cord immediately if damaged 

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 bare wiring can kill.

D

Turn off all equipment when not in use.

D

Do not use worn, damaged, undersized, or poorly spliced cables.

D

Do not drape cables over your body.

D

If earth grounding of the workpiece is required, ground it directly

with a separate cable.

D

Do not touch electrode if you are in contact with the work, ground,

or another electrode from a different machine.

D

Do not touch electrode holders connected to two welding ma-

chines at the same time since double open-circuit voltage will be

present.

D

Use only well-maintained equipment. Repair or replace damaged

parts at once. Maintain unit according to manual.

D

Wear a safety harness if working above floor level.

D

Keep all panels and covers securely in place.

D

Clamp work cable with good metal-to-metal contact to workpiece

or worktable as near the weld as practical.

D

Insulate work clamp when not connected to workpiece to prevent

contact with any metal object.

D

Do not connect more than one electrode or work cable to any

single weld output terminal.

SIGNIFICANT DC VOLTAGE exists in inverter-type

welding power sources after removal of input

power.

D

Turn Off inverter, disconnect input power, and discharge input

capacitors according to instructions in Maintenance Section

before touching any parts.

Welding produces fumes and gases. Breathing

these fumes and gases can be hazardous to your

health.

FUMES AND GASES can be hazardous.

D

Keep your head out of the fumes. Do not breathe the fumes.

D

If inside, ventilate the area and/or use local forced ventilation at the

arc to remove welding fumes and gases.

D

If ventilation is poor, wear an approved air-supplied respirator.

D

Read and understand the Material Safety Data Sheets (MSDSs)

and the manufacturer’s instructions for metals, consumables,

coatings, cleaners, and degreasers.

D

Work in a confined space only if it is well ventilated, or while

wearing an air-supplied respirator. Always have a trained watch-

person nearby. Welding fumes and gases can displace air and

lower the oxygen level causing injury or death. Be sure the breath-

ing air is safe.

D

Do not weld in locations near degreasing, cleaning, or spraying op-

erations. The heat and rays of the arc can react with vapors to form

highly toxic and irritating gases.

D

Do not weld on coated metals, such as galvanized, lead, or

cadmium plated steel, unless the coating is removed from the weld

area, the area is well ventilated, and while wearing an air-supplied

respirator. The coatings and any metals containing these elements

can give off toxic fumes if welded.