Lincoln Electric SF2400 STATIONARY FAN IM622, Operator'S Manual

ii

SAFETY

ii

ARC RAYS can burn.

4.a. Use  a  shield  with  the  proper  filter  and  cover

plates  to  protect  your  eyes  from  sparks  and
the rays of the arc when welding or observing
open  arc  welding.  Headshield  and  filter  lens
should conform to ANSI Z87. I standards.

4.b. Use  suitable  clothing  made  from  durable  flame-resistant

material  to  protect  your  skin  and  that  of  your  helpers  from
the arc rays.

4.c. Protect other nearby personnel with suitable, non-flammable

screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.

ELECTRIC  SHOCK  can
kill.

3.a. The  electrode  and  work  (or  ground)  circuits

are  electrically  “hot”  when  the  welder  is  on.
Do not touch these “hot” parts with your bare
skin  or  wet  clothing.  Wear  dry,  hole-free

gloves to insulate hands.

3.b. Insulate yourself from work and ground using dry insulation.

Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.

In  addition  to  the  normal  safety  precautions,  if  welding
must  be  performed  under  electrically  hazardous
conditions  (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, if there is a high risk of unavoidable or
accidental  contact  with  the  workpiece  or  ground)  use
the following equipment:

• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.

3.c. In  semiautomatic  or  automatic  wire  welding,  the  electrode,

electrode  reel,  welding  head,  nozzle  or  semiautomatic
welding gun are also electrically “hot”.

3.d. Always  be  sure  the  work  cable  makes  a  good  electrical

connection  with  the  metal  being  welded.  The  connection
should be as close as possible to the area being welded.

3.e. Ground the work or metal to be welded to a good electrical

(earth) ground.

3.f. Maintain the electrode holder, work clamp, welding cable and

welding machine in good, safe operating condition. Replace
damaged insulation.

3.g. Never dip the electrode in water for cooling.

3.h. Never  simultaneously  touch  electrically  “hot”  parts  of

electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.

3.i. When working above floor level, use a safety belt to protect

yourself from a fall should you get a shock.

3.j. Also see Items 6.c. and 8.

FUMES AND GASES
can be dangerous.

5.a. Welding  may  produce  fumes  and  gases

hazardous to health. Avoid breathing these
fumes  and  gases.  When  welding,  keep
your  head  out  of  the  fume.  Use  enough
ventilation and/or exhaust at the arc to keep

fumes  and  gases  away  from  the  breathing  zone. 

When

welding  with  electrodes  which  require  special
ventilation  such  as  stainless  or  hard  facing  (see
instructions  on  container  or  MSDS)  or  on  lead  or
cadmium  plated  steel  and  other  metals  or  coatings
which  produce  highly  toxic  fumes,  keep  exposure  as
low  as  possible  and  within  applicable  OSHA  PEL  and   

ACGIH  TLV  limits  using  local  exhaust  or  mechanical
ventilation.  In  confined  spaces  or  in  some  circum-
stances,  outdoors,  a  respirator  may  be  required.
Additional  precautions  are  also  required  when  welding
on galvanized  steel.

5. b.  The operation of welding fume control equipment is affected

by  various  factors  including  proper  use  and  positioning  of
the equipment, maintenance of the equipment and the spe-
cific  welding  procedure  and  application  involved.    Worker
exposure  level  should  be  checked  upon  installation  and
periodically  thereafter  to  be  certain  it  is  within  applicable
OSHA PEL and ACGIH TLV limits.

5.c. Do not weld in locations near chlorinated hydrocarbon vapors

coming  from  degreasing,  cleaning  or  spraying  operations.
The heat and rays of the arc can react with solvent vapors to
form phosgene, a highly toxic gas, and other irritating prod-
ucts.

5.d. Shielding  gases  used  for  arc  welding  can  displace  air  and

cause  injury  or  death.  Always  use  enough  ventilation,
especially  in  confined  areas,  to  insure  breathing  air  is  safe.

5.e. Read and understand the manufacturer’s instructions for this

equipment  and  the  consumables  to  be  used,  including  the
material  safety  data  sheet  (MSDS)  and  follow  your
employer’s safety practices. MSDS forms are available from
your  welding  distributor  or  from  the  manufacturer.

5.f. Also see item 1.b.