Miller HJ134589 User manual

April
1978
FORM:
OM-457C
MODEL
Trailblazer
22G
OWN
ERS
MANUAL
ITIIIIER
MILLER
ELECTRIC
MFG.
CO.
718
S.
BOUNDS
ST.
P.O.
Box 1079
APPLETON,
WI
54912
USA
Effective
With
Serial
No.
HJ134589
NWSA
CODE
NO. 4579
PRINTED
IN
U.S.A.

LIMITED
WARRANTY
EFFECTIVE:
FEBRUARY
20,
1978
a
This
warranty
supersedes
all
previous
MILLER
warranties and is
ex
clusive
with
no
other
guarantees
or
warranties
expressed
or
implied.
LIMITED
WARRANTYMiller Electric
Mfg.
Co..
Apple-
1.
Arc
welders,
power
sources,
and
components.
.
1
year
ton,
Wisconsin
warrants
to
Customer
that
all
new and
unused
2.
Original
main
power
rectifiers
3
years
Equipment
furnished
by
Miller
is
free
from
defect
in
(Labor

1
year
only)
workmanship
and material
as
of
the
time
and
place
of
delivery
by
Miller.
No
warranty
is
made
by
Miller with
3.
All
welding
guns
and
feeder/guns
90
days
respect
to
engines,
trade
accessories
or
other items
manu-
4. All
other
Millermatic
Feeders
1
year
factured
by
others.
Such
engines,
trade
accessories
and
other
provided
that the
user so
notifies
Miller
in
writing
within
thirty
items
are
sold
subject
to
the
warranties
of
their
respective
(30)
days
of the
date
of
such failure.
manufacturers,
if
any.
The
manufacturers
warranty
on
5.
Replacement
or
repair
parts
exclusive
of labor
60
days
engines
is
for
a
period
of
one
year.
MILLER
warranty
does
not
apply
to
components
having
ANY EXPRESS WARRANTY
NOT
PROVIDED
normal
useful
life
of less than
one
(1)
year,
such
as
spot
HEREIN
AND ANY IMPLIED
WARRANTY,
GUARANTY
welder
tips,
relay
and
contactor
points,
MILLERMATIC
OR
REPRESENTATION
AS
TO
PERFORMANCE,
AND
parts
that
come
in
contact
with the
welding
wire
including
ANY
REMEDY
FOR
BREACH
OF
CONTRACT
WHICH,
nozzles
and
nozzle
insulators
where
failure
does
not
result
BUT
FOR THIS
PROVISION,
MIGHT ARISE
BY
from defect
in
workmanship
or
materiat.
IMPLICATION,
OPERATION
OF
LAW,
CUSTOM
OF
TRADE OR COURSE
OF
DEALING,
INCLUDING ANY
In
the
case
of
Millers breach of
warranty
or
any
other
IMPLIED
WARRANTY
OF
MERCHANTABILITY
OR
OF
duty
with
respect
to
the
quality
of
any
goods,
the
exclusive
remedies
therefor
shall
be,
at
Millers
option,
(1)
repair
or
(2)
FITNESS FOR PARTICULAR
PURPOSE,
WITH
RESPECT
replacement
or,
where
authorized
in
writing
by
Miller
in
TO
ANY AND
ALL
EQUIPMENT
FURNISHED
BY
appropriate
cases,
(3)
the
reasonable
cost
of
repair
or
MILLER
IS
EXCLUDED
AND
DISCLAIMED
BY
MILLER.
replacement
at
an
authorized
Miller
service
station
or
(4)
payment
of
or
credit
for
the
purchase price
(less
reasoi~able
EXCEPT AS
EXPRESSLY
PROVIDED BY
MILLER
IN
depreciation
based
upon
actual
use)
upon
return
of
the
goods
WRITING,
MILLER
PRODUCTS
ARE
INTENDED FOR
at
Customers risk and
expense.
All
transactions
are
FOB.
ULTIMATE
PURCHASE
BY
COMMERCIAL/INDUSTRIAL
$
Appleton.
Wisconsin.
Upon receipt
of
notice
of
apparent
USERS
AND
FOR
OPERATION
BY
PERSONS
TRAINED
defect
or failure,
Miller shall
instruct the
claimant
on
the
AND
EXPERIENCED
IN
THE USE
AND
MAINTENANCE
warranty
claim
procedures
to
be followed.
OF WELDING
EQUIPMENT
AND
NOT,
FOR
CONSUMERS
As
a
matter
of
general
policy only,
Miller
may
honor
an
OR
CONSUMER
USE.
MILLER
WARRANTIES
DO
NOT
original
users
warranty
claims
on
warranted
Equipment
in
EXTEND
TO,
AND
NO
RESELLER
IS
AUTHORIZED TO
the
event
of failure
resulting
from
a
defect within the
following
periods
from
the
date
of
delivery
of
Equipment
to
EXTEND
MILLERS
WARRANTIES
TO,
ANY
the
original
user:
CONSUMER.

ERRATA
SHEET
After this manual
was
printed,
refinements
in
equipment
design
occurred.
This sheet
lists
ex.cenXioi~s.tadata aooearina
later in
this
manual.
AMENDMENT
TO SECTION
3
INSTALLATION
Amend Section 3-3.
EQUIPMENT
GROUNDING
TERMINAL
Normally engine-driven welding
generators
do
not
require
grounding.
However,
this
machine has
auxiliary
power
plant
capability;
therefore,
grounding
of
the
frame
and
case
is
recommended.
Also,
unusual circumstances
may
re
quire
machine
grounding.
For
these
reasons
a
convenient
grounding
terminal
is
provided
on
all
weld/power
units.
For
detailed
grounding
instructions
consult
your,
local
or state
codes
and
the
latest issue of the National
Electrical
Code.
If additional information
regarding
your
particular operating
circumstances
and/or
grounding
requirements
is
needed,
consult
a
qualified
electrician
or
your
dealer.
After
determining
the
extent
to
which
any
grounding
re
quirements
apply
to
your
particular
situation,
follow
them
explicitly.
Circuit
Groundingl
Jumper
Lead
IShipped
Ungrounded)
AMENDMENT
TO
SECTION 5-
FUNCTION
OF GENERATOR
CONTROLS
Amend
Sections
5-1 and 5-9
Add
the
following
CAUTION
block
at
the
beginning
of
the
section
TC-000
680-B
Amend
Figure
3-3.
Power
Plant
Connections
Figure
3-3. Power
Plant
Connections
CAUTION:
_______
The
auxiliary
power
capability
of
this
welding
generator
is
primarily
intended for
use
with
portable
cord-
connected
accessory
equipment
(lights,
drills,
grinders,
etc.).
Do
not
connect this
unit
to
any
service
box,
swit
chboard,
panelboard,
or
other
equipment normally
supplied by
other electrical
power
unless
a
proper
transfer switch
and
grounding
procedure
is
employed
(see
Section
3-3
for
unit
grounding
information).
ALWAYS
consult the
local
electric
utility,
local
and
state
codes,
and
the
latest
issue of the
National
Electrical Code
for
proper
installation
pro
cedures.
Since hazardous
voltages
are
present,
it
is recommended that the
installation
be
made
by
a
licensed
electri
-
clan
to
avoid
injury
or
damage
caused
by
improper
or
faulty
installation.
AMENDMENT TO
SECTION
6-
FUNCTION OF ENGINE
CONTROLS
Delete
Section
6-7.
ELECTRICAL
TACHOMETER
(OPTIONAL)
/
AMENDMENT TO
SECTION
7-
SEQUENCE
OF
OPERATION
Amend Section
7-2.
POWER
PLANT
OPERATION
OM-457C
Page
A

CAUTION.:
-
Add CAUTION
block
at
beginning
of Section
/
The
weld
output
terminals
are
electrically energized
when
the
engine
is
running.
Disconnect
the~
we/ding
cables
when
not
we/ding
and do
not
touch
the
output
terminals
when the
engine
is
running.
AMENDMENT
TO SECTION 9-
ENGINE
MAINTENANCE
Amend Section
9-3.
GOVERNOR
SERVICE
Weld
speed
of this
engine
is 1850
rpm.
Amend Section 9-4.
CARBURETOR
FLOAT SETTING
Carburetor
Change
Effective
With
Serial
No.
HJ185451
I~1t~
Do
not
bend,
twist,
or
apply
pressure
on
the
float
body.
The
float
body,
when viewed from the
free
end,
must
be
centered
between
and
at
right
angles
to
the
machined
surface,
and
must
move
freely
on
the float
axle.
This
engine
is
equipped
with
a
Teledyne
Walbro
carburetor.
To
ensure
correct
fuel
level
in the float
chamber,
check distance
(dimension
A,
Figure
9-1)
from
top
of float
to
machined
surface of
throttle
body
(no
gasket)
with
throttle
body
inverted.
This dimension should be
1-1/16
inches
plus
or
minus .020
inch.
To
increase
or
decrease
distance from
the
top
of
the float
body
to
the machined
surface,
use
a
long
nose
pliers
and bend
the
float
lever
at
a
point
close
to
the float
body.
Delete
Figure
9-2. Carburetor
Float
Setting
Amend Section
9-9.
IDLE
CONTROL/GOVERNOR
LINKAGE
ADJUSTMENT
(Figure
9-7)
Amend
Figure
9-7. IDLE
CONTROL/GOVERNOR
LINKAGE
ADJUSTMENT
To
obtain
proper
engine
idle
and/or
weld
speed,
perform~
the
following
procedures:
0M-457C
Page
B
Figure
9-7. Idle
Control/Governor
Linkage
Adjustment
TCO8O
511

IMPORTANT
CAUTION
IMPORTANT
IMPORTANT
1.
Loosen
the
linkage
nuts
(6
&
8)
and
remove
the
hardware
(10)
securing
the
linkage
socket
(9)
to
the
governor.
Rotate
thelinkage
socket
(9)
until the
throttle
stop
plate
(2)
is
about
1/32
inch
from
the
stop
(1).
A
clockwise
rotation
of the
linkage
socket
(9)
will shorten
the
governor
linkage
(7)
and
reduce
the
gap;
a
counterclockwise
rotation
of
the
linkage
socket
(9)
will
lengthen
the
governor
linkage
(7)
and
widen
the
gap.
(In
some
cases
it
may
be
necessary
to
adjust
the
linkage
itself
to
obtain
the
1/32
inch
gap
required.)
Tighten
the
linkage
socket
nuts
(6
&
8)
to
lock the
position
of
the
linkage
sockets
(5
&
9).
______________
Check
the
linkage
(7J
for freedom
of
movement
throughout
its
entire
travel. If the
linkage
is
binding
due
to
the
linkage
socket
nuts
(5
&
9)
being
out
of
proper
alignment,
loosen
the
linkage
socket
nuts
(6
&
8)
and
rotate
the
sockets
(5
&
9)
slightly
until unrestricted
movement
of the
linkage
(7)
is restored.
Tighten
the
linkage
socket
nuts
(6&8).
Ensure
that
body
limbs
are
clear
of
the
fan and the
vacuum
motor
unit before
starting
or
working
on
the
~.
engine.
-------
--------~
---- -
-
-:~-~
-
2. Recheck
all
adjustments
made
thus
far.
Place
the
IDLE
CONTROL switch
in the
LOCK OUT
position.
Start
the
engine
and
allow
it
to
reach normal
operating
temperature
(about
five
minutes).
Ensure
that the
CHOKE
control
is
pushed
fully
in
at
this time.
-
3.
Pull
the
arm (3)
toward
the front of
the
welding
generator
to
the
idle
position.
Maintain
pressure
on
the
arm
(3)
to
butt
against
the
idle
screw
(4)
throughout
the
following
adjustments:
A. Rotate the
idle
screw (4)
to
obtain 550
rpm.
Clockwise
rotation
of the
screw
(4)
will
increase
engine
rpm,
whereas
counterclockwise rotation of the
screw (4)
will
decrease
engine
rpm.
B.
Rotate the idle
mixture
adjustment
screw
(20)
counterclockwise
until the
engine
begins
to
falter
or
roll;
then
rotate
the
screw (20)
clockwise until
the
engine
operates
smoothly.
Rotating
the
screw
(20)
clockwise
restricts
the fuel
flow,
making
the
air-fuel
mixture
leaner.
Rotating
the
screw
(20)
counterclockwise
admits
more
fuel,
making
the
air-fuel
mixture
richer.
Ensure that the
vacuum
motor
idle
screw
(16)
butts
against
the
vacuum
motor
unit
mounting
plate
BEFORE
the
throttle
stop plate
(2)
butts
against
the idle
screw
(4)
prior
to
p/acing
the
IDLE
CONTROL
switch
in
the
AUTOMA TIC
IDLE
position.
To
obtain
this condition it
may
be
necessary
to
adjust
screw
(16).
Check
by
manually
pivoting
the
vacuum
motor
arm (17)
until
screw (16)
butts
against
the
mounting
plate.
4.
Place the
IDLE
CONTROL
switch
in
the
AUTOMATIC
IDLE
position.
Operation
of the
idling
device
is
automatic
when
the
IDLE
CONTROL
switch
is in the
AUTOMATIC
IDLE
position.
When
the
engine
is
running,
engine
rpm
will
remain
at
idle
until
an arc
is
established,
at
which time the
engine
immediately
comes
up
to
weld
rpm.
When
the
arc
is
broken,
a
time
delay
will exist before
the
engine
begins
to
return
to
idle
rpm.
The
length
of
this
time
delay
is
controlled
by
the
setting
of the
time-delay
screw
A
in
Figure
9-7.
If the
engine
does
not
go
to
idle
rpm
after
about
ten
seconds,
adjust
the
time-delay
screw
(A)
for the
desired
time
delay.
This
screw
is located
on
the
vacuum
line
fitting going
into
the intake
manifold of the
engine.~
5. When
the
engine
has
gone
to
idle
rpm,
adjust
screw
(16)
until
1200
rpm
is
obtained.
I~EIi11~
Do
not
readjust
the idle
rpm
screw
(4)
when
adjusting
the
vacuum
motor
idle
rpm.

-
______________
Check
the
linkage
(19)
for
freedom
of movement
throughout
its
entire
travel. If
the
linkage
is
binding
due
to
the
linkage
socket
(18)
being
outof
proper
alignment
with
the fixed
end,
adjust
the
tength
of the
linkage.
It will-
then be
necessary
to
readjust
the
vacuum
motor
idle
screw
(16)
and
repeat
Steps
4
and
5.
Is~..tU.I
I
~ ~
Ensure
that
body
limbs
are
clear
of
the fan and the
vacuum
motor
unit
before
working
on
the
engine.
6. Place
the
IDLE
CONTROL
switch
in
the
LOCK
OUT
position.
Loosen
the
governor
speed
adjusting
screw
secur
ing
nut
(11).
Adjust
the.governor
speed adjustment
screw
(12)
until
a
high
idle
rpm
of
1850
is
obtained.
Tighten
the
securing
nut
(11)
to
maintain
the
governor
speed
setting.
7.
Check the
governor
engine
regulation
by
applying
and
removing
the
engine
load.
If
a
governor
sensitivity
adjust
ment
is
deemed
necessary,
loosen
one
of
the
two
locking
nuts
(13)
and
proceed
with the
following
instructions:
A.
IF
REGULATION RANGE
IS TOO
BROAD
-
Decrease
the
governor
spring
(15)
tension
by sliding
the
sen
sitivity adjustment
screw
(14)
inward.
B.
IF
REGULATION
RANGE
IS
TOO
NARROW
-
Increase the
governor
spring
(15)
tension
by sliding
the
sen
sitivity
adjustment
screw
(14)
outward.
C.
IF ENGINE
SURGES
(HUNTS)
UNDER LOAD
Increase
the
governor
spring
(15)
tension
by sliding
the
sen
sitivity
adjustment
screw
(14)
outward.
-~
-

8.
Tighten
the
two
locking
nuts
(13)
to
maintain
the
desired
governor
sensitivity.
Readjust
the
governor
sensitivity
by repeating
Step
7.
) 1~
Whenever
the
governor
sensitivity (Step
7)
is
adjusted,
the
governor
speed
(Step
6)
MUST be
readjusted.
Whenever
the
governor
speed
(Step
61
is
adjusted,
the
governor
sensitivfty
(Step
71
MAY
need
readjustment.
Amend
Section 9-10. HIGH
ALTITUDE
CARBURETOR
MODIFICATION
(Optional)
(Figure
9-7)
The
Teledyne
Walbro carburetor
can
be
equipped
with
an
adjustable
main
jet
for
high-altitude
operation
(above
4000
ft.).
Minor
adjustment
will be
necessary
for
proper
operation
at
a
particular
altitude. Whenever
a
carburetor
adjust
ment
is deemed
necessary,
see
Figure
9-7
and
proceed
as
follows:
Loosen
the main
adjustment
screw
locking
nut
(22).
Apply
a
near-full
engine
load
to
the
welding
generator.
Rotate
the
main
adjustment
screw
(21)
clockwise until the
engine begins
to
falter and
lose
RPM.
Rotate the
main
adjustment
screw
(21)
counterclockwise until the
engine
operates
smoothly;
then continue counterclockwise rotation of
1/4
turn.
Rotating
the
screw
(21)
clockwise
restricts
the
fuel
flow,
making
the
air-fuel
mixture leaner.
Rotating
the
screw
(21)
counterclockwise admits
more
fuel,
making
the
air-fuel
mixture richer. Remove the
engine
load.
Tighten
the
locking
nut
(22).
IMPORTANT
Restricting
the fuel flow
to
the
point
where the
mixture is
too
lean will-cause valve
burning.
Delete
Figure
9-8.
High-Altitude
Carburetor
Adjustment
AMENDMENT TO SECTION 10
-
TROUBLESHOOTING
C
o~a UETEA
(Q~T C%AL)
OM-457C
PageD
Figure
10-1.
Circuit
Diagram
For Models
Effective
With
Serial
No.
HJ211479
Amend
Figure
10-1.
Circuit
Diagram
AC
EOWE3
,,_-_~___
5EU~A4~. GRCcu~UIC
~
S~3ED
E~E1r
*.OTE ~ SIAAA ~ AE
AWE
A1.DWELE!R
jESUS
72
33
r.._77 ~
;scfi -~
~
127
J,~2
24
23
EOW
REAR VIEW
CAUTION
I
I
I
c0)
~
-~<
CA~.GE-3VER
I
~
~7
I
I
NCI.~C:p~V
acE
~OLr
I
If
-
/
Circuit
Diagram
No.
B-081 027

)tem
Dia.
Part
No.
Listed
-
No.
Mkgs.
In Parts
List
6
010318
33
053724
53
017421
77
Zi
036259
80
VS1
025932
OlO
493
053
359
Replaced
With
Part No.
015 602
053
966
049685
036 377
024 017
Deleted
032
936
080 487
601158
079 486
010 014
010
891
030 170
011 609
Quantity
1
2
2
1
1
1
1
2
1
1
1
1
2
BE SURE
TO
PROVIDE MODEL
AND
SERIAL NUMBERS WHEN
ORDERING
REPLACEMENT PARTS.
OM-457C
Page
E
Description
Page
4
Page
5
97
TAC
HM
032
936
032
936
039
269
100
146
S2,5
VALVE,
shut
-
off
w/strainer
-
fuel
GUARD,
fan
CATCH,
door
REACTOR
SUPPRESSOR,
0.75
uf
65
volts
ac (Eff
with
S/N
HK311202)
METER
(dia.
mkg.
changed)
FUSE BOX
(Eff
with
S/N
HJ211479)
BLANK,
snap
-
in
7/8
(Eff
with
S/N
HJ21
1479)
COVER,
junction
box
(Eff
with
S/N
HJ21
1479)
CLAMP,
steel
-
cushion 3/4
dia
x
13/64
hole
(Eff
with
S/N
HJ21
1479)
BLANK,
snap
-
in 1 inch
dia
(Eff
with
S/N
HJ211479)
BUSHING,snapin3/4IDx1
SWITCH,
toggle
SPDT
15
amp
125
volts

p.

Section No.
TABLE
OF CONTENTS
Page
No.
SECTION
1

SAFETY RULES FOR
OPERATION
OF ARC WELDING
POWER SOURCE
SECTION
2
INTRODUCTION
2-1.
2
-
2.
2
-
3.
2-4.
General
Receiving-Handling
Description
Safety
SECTION
3
INSTALLATION
3-1.
3-2.
3
-
3.
3-4.
4-1.
4
-
2.
4
-
3.
4
-
4.
4
-
5.
5-1.
5
-
2.
5
-
3.
5
-
4.
5
-
5.
5
-
6.
5-7.
5-8.
5-9.
6-1.
6
-
2.
6
-
3.
6-4.
6
-
5.
6
-
6.
6
-
7.
6
-
8.
7- 1.
7
-
2.
7
-
3.
7
-
4.
Location
Weld
Output
Connections
Equipment
Grounding
Terminal
Remote
Amperage
Control
Connections
6677
7
8
8
8
9
9
10
10
10
10
10
11
11
11
11
12
12
12
12
12
12
12
12
13
13
13
13
1 -1.
1
-
2.
1
-
3.
1
-
4.
Introduction
General Precautions
Arc
Welding
Standards
Booklet
Index
1
3
4
5
5
5
5
3- 5.
120/240
Volts AC
Terminals..
SECTION
4
ENGINE
PREPARATION
Lubrication
Coolant
System
Preparing
New
Battery
For Service
Air
Cleaner
Fuel
SECTION
5

FUNCTION
OF
GENERATOR
CONTROLS
120
Volts AC
Receptacle
Range
Switch
Fine
Amperage
Control
Remote
Amperage
Control
Volt-Ampere
Curves
Duty
Cycle
Polarity
Switch
Meters
240 Volts AC
Duplex
Receptacle
SECTION
6 FUNCTION
OF
ENGINE
CONTROLS
Choke
Control
Start
Push
Button And
Switch
Idle Control
Switch
Engine
Ammeter
Temperature
Gauge
Oil
Pressure
Gauge
Electrical
Tachometer
Total
Hour
Meter
SECTION
7

SEQUENCE OF OPERATION
Sheilded Metal-Arc
(SMAW)
Welding
Power
Plant
Operation
Starting
The
Engine
Engine
Shut
Down

Section No.
Page
No.
SECTION
8

GENERATOR
MAINTENANCE
8-1. General
14
8
-
2.
Collector
Ring
Brushes
14
8-
3.
Welding
Cables
14
SECTION
9
ENGINE
MAINTENANCE
9-1.
Lubrication
14
9~ 2.
Coolant
System
14
9-3. Governor Service
15
9.
4.
Carburetor
Float
Setting
15
9-
5. Vacuum
Circuit
Air
Filter
15
9.
6.
Idle
Control
Time
Delay
Adjustment
15
9-
7.
Carburetor
Air
Temperature
Selector
15
9- 8. Air Cleaner
Service
16
9-
9.
Idle
Control/Governor
Linkage
Adjustment
17
9.10.
High
Altitude Carburetor
Modification 18
9.11.
Key
Type
Ignition
Switch Lubrication
18
9-12.
Spark
Arrestor 18
SECTION
10
TROUBLESHOOTING
PARTS LIST

SECTION
1-SAFETY
RULES FOR
OPERATION
OF
ARC
WELDING
POWER
SOURCE
1-1.
INTRODUCTION
1-2.
A.
We
learn
by experience.
Learning safety
through
personal
experience,
like
a
child
touching
a
hot
stove
is
harmful,
wasteful,
and
unwise.
Let
the
experience
of
others teach
you.
Safe
practices
developed
from
experience
in
the
use
of
weld
ing
and
cutting
are
described
in
this
manual.
Research,
devel
opment,
and field
experience
have
evolved reliable
equipment
and
safe
installation,
operation,
and
servicing
practices.
Acci
dents
occur
when
equipment
is
improperly
used
or
main
tained. The
reason
for
the safe
practices
may
not
always
be
given.
Some
are
based
on common
sense,
others
may
require
technical volumes
to
explain.
It
is
wiser
to
follow
the
rules.
Read
and
understand
these
safe
practices
before
attempting
to
install,
operate,
or
service
the
equipment.
Comply
with
these
procedures
as
applicable
to
the
particular
equipment
used and
their
instruction
manuals,
for
personal
safety
and
for
the
safety
of
others.
Failure
to
observe
these safe
practices
may
cause
serious
in
jury
or
death. When
safety
becomes
a
habit,
the
equipment
can
be
used with
confidence.
These
safe
practices
are
divided
into
two
Sections:
1
-
General
Precautions,
common
to
arc
welding
and
cutting;
and
2
-
Arc
Welding
(and
Cutting) (only).
Reference
standards: Published Standards
on
safety
are
also
available
for
additional and
more
complete
procedures
than
those
given
in this
manual.
They
are
listed
in
the
Standards
Index
in
this
manual.
ANSI Z49.1
is the
most
complete.
The
National Electrical
Code, Occupational
Safety
and
Health
Administration,
local
industrial
codes,
and local
in
spection requirements
also
provide
a
basis for
equipment
in
stallation,
use,
and
service.
GENERAL
PRECAUTIONS
Burn
Prevention
Wear
protective
clothing
-
leather
(or
asbestos)
gauntlet
gloves,
hat,
and
high
safety-toe
shoes. Button
shirt
collar
and
pocket
flaps,
and
wear
cuffless
trousers
to
avoid
entry
of
sparks
and
slag.
Wear
helmet
with
safety
goggles
or
glasses
with
side shields
underneath,
appropriate
filter
lenses
or
plates
(protected
by
clear
cover
glass).
This
is
a
MUST
for
welding
or
cutting,
(and
chipping)
to
protect
the
eyes
from
radiant
energy
and
flying
metal.
Replace
cover
glass
when
broken,
pitted,
or
spattered.
See 1-3A.2.
Avoid
Oily
or
greasy
clothing.
A
spark
may
ignite
them.
Hot metal
such
as
electrode stubs
and
workpieces
should
never
be
ha,dled without
gloves.
Medical
first
aid
and
eye
treatment.
First
aid facilities and
a
qualified
first aid
person
should
be available
for
each
shift
unless
medical
facilities
are
close
by
for
immediate
treatment
of
flash
burns
of
the
eves
and
skin
burns.
Ear
plugs
should
be
worn
when
working
on
overhead
or
in
a
confined
space.
A
hard
hat
should
be
worn
when
others work
overhead.
Flammable
hair
preparations
should
not
be
used
by
persons
intending
to
weld
or
cut.
B.
Toxic
Fume
Prevention
Adequate
ventilation. Severe
discomfort,
illness
or
death
can
result from
fumes,
vapors,
heat,
or
oxygen
enrichment
or
depletion
that
welding
(or
cutting)
may
produce.
Prevent
them with
adequate
ventilation
as
described
in
ANSI Stan
dard
Z49.1
listed
1 in
Standards index.
NEVER
ventilate
with
oxygen.
Lead
-,
cadmium
-.
zinc
-.
mercury
-,
and
beryllium
-
bearing
and
similar
materials,
when
welded
(Or
cut)
may
produce
harmful
concentrations
of
toxic
fumes.
Adequate
local
exhaust
ventilation
must
be
used,
or
each
person
in
the
area
as
well
as
the
operator
must
wear
an
air-supplied respirator.
For
beryllium,
both
must
be
used.
Metals
coated with
or
containing
materials
that emit
toxic
fumes
should
not
be heated unless
coating
is
removed from
the
work
surface,
the
area
is
well
ventilated,
or
the
operator
wears
an
air-suppied
respirator.
Work
in
a
confined
space
only
while
it
is
being
ventilated
and,
if
necessary,
while
wearing
an
air-supplied
respirator.
Gas
leaks
in
a
confined
space
should
be
avoided.
Leaked
gas
in
large
quantities
can
change
oxygen
concentration
danger
ously.
Do
not
bring
gas
cylinders
into
a
confined
space.
Leaving
confined
space,
shut
OFF
gas
supply
at
source
to
prevent
possible
accumulation of
gases
in
the
space
if
down
stream valves
have
been
accidently
opened
or
left
open.
Check
to
be
sure
that
the
space
is
safe
before
re-entering
it.
Vapors
from
chlorinated
solvents
can
be
decomposed
by
the
heat
of
the
arc
(or
flame)
to form
PI-IOSGENE,
a
highly
toxic
gas,
and
other
lung
and
eye
irritating
products.
The
ultra
violet
(radiant)
energy
of
the
arc
can
also
decompose
tn
chloroethylene
and
perchloroethylene
vapors
to
form
phos
gene.
DO
NOT
WELD
or
cut
where
solvent
vapors
can
be
drawn
into the
welding
or
cutting
atmosphere or
where the
radiant
energy
can
penetrate
to
atmospheres
containing
even
minute
amounts
of
trichloroethylene
or
perchloroethylene.
C.
Fire
and
Explosion
Prevention
Causes
of
fire
and
explosion
are:
combustibles
reached
by
the
arc,
flame,
flying
sparks,
hot
slag
or
heated
material;
misuse
of
compressed
gases
and
cylinders;
and short
circuits.
BE
AWARE THAT
flying
sparks
or
falling
slag
can
pass
through
cracks,
along
pipes,
through
windows
or
doors,
and
through
wall
or
floor
openings,
Out
of
sight
of the
goggled
operator.
Sparks
and
slag
can
fly
35
feet.
To
prevent
fires
and
explosion:
Keep
equipment
clean
and
operable,
free
of
oil,
grease,
and
(in
electrical
parts)
of
metallic
particles
that
can cause
short
circuits.
If
combustibles
are
in
area,
do
NOT
weld
or
cut.
Move
the
work if
practicable,
to
an
area
free of
combustibles. Avoid
paint
spray rooms,
dip
tanks,
storage
areas,
ventilators.
If
the
work
cannot
be
moved,
move
combustibles
at
least
35
feet
away
Out
of
reach
of
sparks
and
heat;
or
protect against
ignition
with suitable
and
snug-fitting,
fire-resistant
covers
or
shields.
Walls
touching
combustibles
on
opposite
sides
should
not
be
welded
on
(or
cut).
Walls,
ceilings,
and
floor
near
work
should
be
protected by
heat-resistant
covers
or
shields.
Fire
watcher
must
be
standing
by
with
suitable
fire
ex
tinguishing
equipment
during
and
for
some
time
after
weld
ing
or
cutting
if:
a.
appreciable
combustibles
(including
building
construc
tion)
are
within
35
feet
b.
appreciable
combustibles
are
further
than
35
feet
but
can
be
ignited
by sparks
c.
openings
(concealed
or
visible)
in
floors
or
walls
within
35
feet
may
expose
combustibles
to
sparks
d.
combustibles
adjacent
to
walls,
ceilings,
roofs,
or
metal
partitions
can
be
ignited
by
radiant
or
conducted
heat.
Hot
work
permit
should
be
obtained
before
operation
to
ensure
supervisors
approval
that
adequate
precautions
have
been
taken.
After
work
is
done,
check
that
area
is free
of
sparks,
glowing
embers,
and
flames.
-
An
empty
container
that
held
combustibles,
or
that
can
pro
duce
flammable
or
toxic
vapors
when
heated,
must
never
be
welded
on
or
cut,
unless
container
has first
been
cleaned
as
described
in
AWS
Standard
A6.O,
listed
3
in
Standards
index.
OM-457
Page
1

This
includes:
a
thorough
steam
or
caustic
cleaning
(or
a
solvent
or
water
washing, depending
on
the
combustibles
solubility)
followed
by
purging
and
inerting
with
nitrogen
or
carbon
dioxide,
and
using
protective
equipment
as
recom
mended
in
A6.0.
Waterfilling
just
below
working
level
may
substitute
for
inerting.
A container with
unknown
contents
should
be
cleaned
(see
paragraph
above).
Do
NOT
depend
on
sense
of
smell
or
sight
to determine
if
it
is
safe
to
weld
or
cut.
Hollow
castings
or
containers
must
be vented before
welding
or
cutting.
They
can
explode.
Explosive
atmospheres.
Never
weld
or
cut where the air
may
contain flammable
dust,
gas,
or
liquid
vapors
(such
as
gaso
line).
D.
Compressed
Gas
Equipment
Standard
precautions. Comply
with
precautions
in
this
manual,
and those
detailed
in
CGA
Standard
P-i,
PRECAU
TIONS FOR SAFE
HANDLING
OF COMPRESSED GASES
~N
CYLINDERS,
listed
6
in
Standards index.
1.
Pressure
Regulators
Regulator
relief
valve
is
designed
to
protect only
the
regula
tor
from
overpressure;
it
is
not
intended
to
protect
any
downstream
equipment.
Provide
such
protection
with
one
or
more
relief
devices.
Never
connect
a
regulator
to a
cylinder
containing
gas
other
than that for
which the
regulator
was
designed.
Remove
faulty
regulator
from
service
immediately
for
repair
(first
close
cylinder
valve).
The
following
symptoms
indicate
a
faulty
regulator:
Leaks
-
if
gas
leaks
externally,
Excessive
Creep
-
if
delivery
pressure
continues
to
rise
with
downstream
valve
closed.
Faulty
Gauge
-
if
gauge
pointer
does
not
move
off
stop pin
when
pressurized,
nor
returns
to
stop
pin
after
pressure
release.
Repair.
Do
NOT
attempt repair.
Send
faulty
regulators
for
repair
to
manufacturers
designated
repair
center,
where
special
techniques
and
tools
are
used
by
trained
personnel.
2.
Cylinders
Cylinders
must
be
handled
carefully
to
prevent
leaks
and
damage
to
their
walls,
valves,
or
safety
devices:
Avoid
electrical
Circuit
contact with
cylinders
including
third
rails,
electrical
wires,
or
welding
circuits.
They
can
produce
short
circuit
arcs
that
may
lead
to
a
serious
accident.
(See
1-3C,)
ICC
or
DOT
marking
must
be
on
each
cylinder.
It
is
an
assurance
of
safety
when
the
cylinder
is
properly
handled.
Identifying
gas
content.
Use
only
cylinders
with
name
of gas
marked
on
them;
do
not
rely
on
color
to
identify
gas
con
tent.
Notify
supplier
if
unmarked.
NEVER DEFACE
or
alter
name,
number,
or
other
markings
on
a
cylinder.
It
is
illegal
and
hazardous.
Empties: Keep
valves
closed, replace
caps
securely;
mark
MT;
keep
them
separate
from
FULLS
and
return
promptly.
Prohibited
use.
Never
use
a
cylinder
or
its
contents
for other
than its
intended
use,
NEVER
as
~a
support
or
roller.
Locate
or
secure
cylinders
so
they
cannot
be
knocked
over.
Passageways
and
work
areas.
Keep
cylinders
clear
of
areas
where
they
may
be
struck.
Transporting
cylinders.
With
a
crane,
use
a
secure
support
such
as
a
platform
or
cradle.
Do NOT
lift
cylinders
off
the
ground
by
their
valves
or
caps,
or
by
chains,
slings,
or
mag
no
ts.
Do
NOT
expose
cylinders
to
excessive
heat,
sparks, slag,
and
flame,
etc.
that
may
cause
rupture.
Do
not
allow
contents
to
exceed
130F.
Cool
with
water
spray
where such
exposure
exists.
Protect
cylinders particularly
valves
from
bumps,
falls,
falling
objects,
and weather.
Replace
caps
securely
when
moving
cylinders.
Stuck
valve.
Do
NOT
use
a
hammer
or
wrench
to
open
a
cylinder
valve
that
can
not
be
opened
by
hand.
Notify
your
Supplier.
Mixing
gases.
Never
try
to
mix
any gases
in
a
cylinder.
Never refill
any
cylinder.
Cylinder
fittings
should
never
be
modified
or
exchanged.
3. Hose
Prohibited
use.
Never
use
hose
other
than
that
designed
for
the
specified
gas.
A
general
hose identification
rule
is:
red
for
fuel
gas,
green
for
oxygen,
and
black for
inert
gases.
Use
ferrules
or
clamps
designed
for
the hose
(not
ordinary
wire
or
other
substitute)
as
a
binding
to connect
hoses
to
fittings.
No
copper
tubing
splices.
Use
only
standard brass
fittings
to
splice
hose.
Avoid
long
runs
to
prevent
kinks
and abuse.
Suspend
hose
off
ground
to
keep
it
from
being
run
over,
stepped
on,
or
other
wise
damaged.
Coil
excess
hose
to
prevent
kinks
and
tangles.
Protect
hose
from
damage
by sharp
edges,
and
by
sparks,
slag,
and
open
flame.
Examine
hose
regularly
for
leaks,
wear,
and
loose
connec
tions.
Immerse
pressured
hose
in
water;
bubbles
indicate
leaks.
Repair leaky
or worn
hose
by
cutting
area
Out
and
splicing
(1-2D3).
Do
NOT
use
tape.
4.
Proper
Connections
Clean
cylinder
valve outlet of
impurities
that
may
clog
orifices
and
damage
seals
before
connecting regulator.
Except
for
hydrogen,
crack
valve
momentarily,
pointing
outlet
away
from
people
and
sources
of
ignition. Wipe
with
a
clean lint-
less
cl
0th.
Match
regulator
to
cylinder.
Before
connecting,
check
that
the
regulator
label
and
cylinder
marking
agree,
and
that
the
regulator
inlet
and
cylinder
outlet
match.
NEVER CON
NECT
a
regulator designed
for
a
particular
gas
or
gases
to a
cylindercontaining
any
other
gas.
Tighten
connections.
When
assembling
threaded
connections,
clean
and smooth
seats
where
necessary.
Tighten.
If
connec
tion
leaks, disassemble,
clean,
and
retighten
using
properly
fitting
wrench.
-
Adapters.
Use
a
CGA
adapter
(available
from
your
supplier)
between
cylinder
and
regulator,
if
one
is
required.
Use
two
wrenches
to
tighten
adapter
marked RIGHT and
LEFT
HAND
threads.
Regulator
outlet
(Or
hose)
connections
may
be
identified
by
right
hand
threads
for
oxygen
and
left hand threads
(with
grooved
hex
on
nut
or
shank) for
fuel
gas.
5.
Pressurizing
Steps:
Drain
regulator
of
residual
gas
through
suitable
vent
before
opening
cylinder
(or
manifold
valve)
by turning
adjusting
screw
in
(clockwise).
Draining
prevents
excessive
compression
heat
at
high
pressure
seat
by
allowing
seat
to
open
on
pressur
ization.
Leave
adjusting
screw
engaged slightly
on
single-stage
regulators.
Stand
to
side
of
regulator
while
opening
cylinder
valve.
Open
cylinder
valve
slowly
so
that
regulator
pressure
in
creases
slowly.
When
gauge
is
pressurized
(gauge
reaches
regu
lator
maximum)
leave
cylinder
valve
.in
following
position:
For
oxygen,
and
inert
gases,
open
fully
to
seal
stem
against
possible
leak.
For
fuel
gas, open
to
less
than
one
turn
to
permit
quick
emergency
shutoff.
Page
2

Use
pressure
charts
(available
from
your
supplier)
for safe
and
efficient,
recommended
pressure
settings
on
regulators.
Check
for leaks
on
first
pressurization
and
regularly
there
after. Brush
with
soap
solution
(capful
of
Ivory
Liquid
or
equivalent
per
gallon
of
water).
Bubbles indicate
leak.
Clean
off
soapy
water
after
test;
dried
soap
is
combustible.
E.
User
Responsibilities
Remove
leaky
or
defective
equipment
from
service immed
iately
for
repair.
See
Use!
Responsibility
statement
in
equip
ment
manual.
F.
Leaving Equipment
Unattended
Close
gas
supply
at
source
and drain
gas.
G.
Rope
Staging-Support
Rope
staging-support
should
not
be
used for
welding
or
cut
ting
operation;
rope
may
burn.
1~3.
ARC WELDING
Comply
with
precautions
in
1-1,
1-2,
and
this
section. Arc
Welding,
properly
done,
is
a
safe
process,
but
a
careless
opera
tor
invites
trouble. The
equipment
carries
high
currents at
significant voltages.
The
arc
is
very
bright
and
hot.
Sparks fly,
fumes
rise,
ultraviolet
and
infrared
energy
radiates,
weld
ments
are
hot,
and
compressed
gases
may
be used. The
wise
operator
avoids
unnecessary
risks
and
protects
himself
and
others from
accidents. Precautions
are
described
here
and in
standards referenced
in
index.
A. Burn
Protection
Comply
with
precautions
in
1-2.
The
welding
arc
is
intense
and
visibly
bright
Its
radiation
can
damage
eyes,
penetrate
lightweight
clothing,
reflect from
light-colored
surfaces,
and
burn the skin
and
eyes.
Skin burns
resemble
acute
sunburn,
those from
gas-shielded
arcs are
more
severe
and
painful.
DONT
GET
BURNED;
COMPLY
WITH
PRECAUTIONS.
1.
Protective
Clothing
Wear
long-sleeve
clothing
(particularly
for
gas-shielded
arc)
in
addition
to
gloves,
hat,
and shoes (1-2A).
As
necessary,
use
additional
protective
clothing
such
as
leather
jacket
or
sleeves,
flame-proof
apron,
and
fire-resistant
leggings.
Avoid
outergarments
of untreated
cotton.
Bare
skin
protection.
Wear
dark,
substantial
clothing.
Button
collar
to
protect
chest and
neck
and button
pockets
to
pre
vent
entry
of
sparks.
2.
Eye
and
Head Protection
Protect
eyes from
exposure
to
arc.
NEVER
look at
an
elec
tric
arc
without
protection.
Welding
helmet
or
shield
containing
a
filter
plate
shade
no.
12
or
denser
must
be used when
welding.
Place
over
face
before
striking
arc.
Protect
filter
plate
with
a
clear
cover
plate.
Cracked
or
broken
helmet
or
shield
should
NOT
be
worn;
radiation
can
pass
through
to
cause
burns.
Cracked,
broken,
or
loose
filter
plates
must
be
replaced
IM
MEDIATELY.
Replace
clear
cover
plate
when
broken,
pitted,
or
spattered.
Flash
goggles
with
side shields
MUST
be
worn
under the
helmet to
give
some
protection
to
the
eyes
should the helmet
not
be lowered
over
the
face
before
an arc
is struck.
Looking
at
an arc
momentarily
with
unprotected
eyes
(particularly
a
high
intensity
gas-shielded
arc)
can
cause
a
retinal burn
that
may
leave
a
permanent
dark
area
in
the
field of vision.
3.
Protection
of
Nearby
Personnel
Enclosed
welding
area.
For
production
welding,
a
separate
room or
enclosed
bay
is
best.
In
open
areas,
surround
the
operation
with
low-reflective,
non.cornbustible
screens
or
panels.
Allow
for
free
air
circulation, particularly
as
floor
level.
Viewing
the
weld.
Provide face
shields
for all
persons
who
will
be
looking
directly
at
the weld.
Others
working
in
area.
See
that
all
persons
are
wearing
flash
goggles.
Before
starting
to
weld;
make
sure
that
screen
flaps
or
bay
doors
are
closed.
B.
Toxic Fume
Prevention
Comply
with
precautions
in
1-2B.
Generator
engine
exhaust
must
be vented
to
the outside air.
Carbon
monoxide
can
kill.
C.
Fire
and
Explosion
Prevention
Comply
with
precautions
in
1-2C.
Equipments
rated
capacity.
Do
not overload
arc
welding
equipment.
It
may
overheat cables
and
cause
a
fire.
Loose
cable
connections
may
overheat
or
flash
and
cause
a
fire.
Never
strike
an arc on
a
cylinder
or
other
pressure
vessel.
It
creates
a
brittle
area
that
can
cause
a
violent
rupture
or
lead
to
such
a
rupture
later
under
rough
handling.
D.
Compressed
Gas
Equipment
Comply
with
precautions
in
1-2D.
E.
Shock Prevention
Exposed
hot
conductors
or
other bare
metal
in
the
welding
circuit,
or
in
ungrounded, electrically-HOT
equipment
can
fatally
shock
a
person
whose
body
becomes
a
conductor.
DO
NOT
STAND,
SIT,
LIE,
LEAN
ON,
OR
TOUCH
a
wet
sur
face when
welding,
without
suitable
protection.
To
protect against
shock:
Keep body
and
clothing
dry.
Never
work
in
damp
area
with
out
adequate
insulation
against
electrical shock.
Stay
on
a
dry duckboard,
or
rubber
mat
when
dampness
or
sweat
can
not
be avoided.
Sweat,
sea
water,
or
moisture
between
body
and
an
electrically
HOT
part
-
or
grounded
metal
-
reduces
the
body
surface
electrical
resistance,
enabling
dangerous
and
possibly
lethal
currents
to
flow
through
the
body.
1.
Grounding
the
Equipment
When
installing,
connect
the frames of
each
unit
such
as
welding
power
source,
control,
i&ork
table,
and
water
circula
tor
to the
building
ground.
Conductors
must
be
adequate
to
carry
ground
currents
safely.
Equipment
made
electrically
HOT
by
stray
current
may
shock,
possibly fatally.
Do
NOT
GROUND
so electrical
conduit,
or
to
a
pipe
carrying
ANY
gas
or a
flammable
liquid
such
as
oil
or
fuel.
Three-phase
connection. Check
phase
requirement
of
equip
ment
before
installing.
If
only
3-phase
power
is
available,
connect
single-phase
equipment
to
only
two
wires
of the
3-phase
line. Do
NOT
connect
the
equipment
ground
lead
to
the
third
(live)
wire,
or
the
equipment
will
become
electri-.
cally
HOT
-
a
dangerous
condition
that
can
shock,
possibly
fatally.
Before
welding,
check
ground
for
continuity.
Be
sure
conduc
tors
are
touching
bare
metal of
equipment
frames
at
connec
tions.
If
a
line cord
with
a
ground
lead
is
provided
with
the
equip
ment
for
connection
to
a
switchbox,
connect
the
ground
lead
to
the
grounded
switchbox.
If
a
three-prong plug
is
added for
connection to
a
grounded
mating
receptacle,
the
ground
lead
must
be
connected
to
the
ground
prong
only.
If
the line
cord
comes
with
a
three-prong plug,
connect to
a
grounded
mating
receptacle.
Never
remove
the
ground
prong
from
a
plug,
or
use
a
plug
with
a
broken
off
ground
prong.
Trademark
of
Proctor
&
Gamble.
OM-457
Page
3

2.
Electrode
Holders
Fully
insulated
electrode
holders
should
be
used.
Do NOT
use
holders
with
protruding
screws.
3.
Connectors
Fully
insulated
lock-type
connectors
should
be used
to
join
welding
cable
lengths.
4.
Cables
Frequently
inspect
cables for
wear,
cracks
and
damage.
IMMEDIATELY
REPLACE
those
with
excessively
worn
or
damaged
insulation
to
avoid
possibly
-
lethal shock
from
bared
cable. Cables
with
damaged
areas
may
be
taped
to
give
resistance
equivalent
to
original
cable.
Keep
cable
dry,
free
of oil
and
grease,
and
protected
from
hot
metal
and
sparks.
5. Terminals
And
Other
Exposed
Parts
Terminals
and other
exposed
parts
of
electrical
units
should
have
insulating
covers
secured before
operation.
6.
Electrode Wire
Electrode
wire
becomes
electrically
HOT
when
the
power
switch
of
gas metal-arc
welding
equipment
is
ON
and
welding
gun
trigger
is
pressed.
Keep
hands and
body
clear of
wire and
other
HOT
parts.
7.
Safety
Devices
Safety
devices
such
es
interlocks
and circuit
breakers
should
not be
disconnected
or
shunted
out.
Before
installation,
inspection,
or
service,
of
equipment,
shut
OFF
all
power
and
remove
line
fuses
(or
lock
or
red-t~
switches)
to
prevent
accidental
turning
ON
of
power.
Discon.
nect
all
cables
from
welding
power source,
and
pull
all
115
volts
line-cord
plu~.
Do
not
open
power
circuit
or
change
polarity
while
welding.
If,
in
an
emergency,
it
must
be
disconnected,
guard against
shock
burns,
or
flash from
switch
arcing.
Leaving
equipment
unattended.
Always
shut
OFF and
dis
connect
all
power
to
equipment.
Power
disconnect
switch
must
be
available
near
the
welding
power
source.
1-4.
STANDARDS
BOOKLET
INDEX
For
more
information,
refer
to
the
following
standards
or
their
latest
revisions and
comply
es
applicable:
1.
ANSI
Standard
Z49.1,
SAFETY IN
WELDING AND
CUTTING
obtainable
from
the
American
Welding
Society,
2501
NW 7th
St.
Miami;
Fla.
33125.
2.
ANSI
Standard
Z87.i,
SAFE
PRACTICE
FOR
OCCUPA
TION
AND
EDUCATIONAL
EYE
AND
FACE PROTEC
TION, obtainable from
American National Standards
Institute,
1430
Broadway.
New
York,
N.Y. 10018.
3.
American
Welding
Society
Standard
A6.0.
WELDING
AND
CUTTING
CONTAINERS
WHICH
HAVE HELD
COMBUSTIBLES,
obtainable
same as
item
1.
4. NFPA
Standard
51,
OXYGEN-FUEL
GAS
SYSTEMS
FOR
WELDING
AND
CUTTING,
obtainable from
the
National
Fire
Protection
Association,
470
AtlantIc
Avenue,
Boston,
Mass.
02210.
5.
NFPA
Standard
51B,
CUTTING
AND
WELDING PRO.
CESSES,
obtainable
same as
item
4.
6. CGA
Pamphlet
P-i. SAFE
HANDLING
OF
COM
PRESSED GASES
IN
CYLINDERS,
obtainablefrom the
Compressed
Gas
Association,
500 Fifth
Avenue,
New
York,
N. Y.
10036.
7.
OSHA
Standard
29
CFR,
Part
1910,
Subpart
Q,
WELD.
ING,
CUTTING
AND
BRAZING.
Page
4

SECTION
2-
INTRODUCTION
Rated
Amperes
Output
Welding
Current
Range
Welding
Current
Ranges
In
Amperes
Open-Circuit
Voltage
Range
Power
Dimensions
(Inches)
Weight
(Pounds)
?~i~E
1520 1560
~.
Coarse
Ranges
Fine
Range
350
@
40V
100%
Duty Cycle
45
To
475
Amps
45-
85
65-140
100-220
130
.
300
220
-475
From
Mm.
To Max.
Of
Each
Coarse
Range
55 To
90
DC
Volts
3kva
120
Volts
AC
50/60
Hz.
While
Welding
7.5
kva
120/240
Volts
AC
50/60
Hz.
As
Power
Plant
Height
-
43-1/2
Width
-25
Depth
-
63
Figure
2-1.
Specifications
TB.007
956
2-1.
GENERAL
This
manual
has
been
prepared
especially
for
use
in
familiar
izing
personnel
with
the
design,
installation,
operation,
main
tenance,
and
troubleshooting
of
this
equipment.
All
informa
tion
presented
herein
should be
given
careful
consideration
to
assure
optimum
performance
of this
equipment.
2-2.
RECEIVING-HANDLING
Prior
to
installing
this
equipment,
clean all
packing
material
from around
the unit
and
carefully
inspect
for
any
damage
that
may
have
occurred
during
shipment.
Any
claims
for loss
or
damage
that
may
have occurred
in
transit
must be
filed
by
the
purchaser
with the carrier.
A
copy
of
the
bill
of
lading
and
freight
bill
will
be
furnished
by
the carrier
on
request
if
occasion
to
file
claim arises.
When
requesting
information
concerning
this
equipment,
it is
essential
that
Model
Description
and/or
Stock
Number
and
Serial
(or
Style)
Numbers
of the
equipment
be
supplied.
2-3.
DESCRIPTION
This
welding
generator
is
driven
by
a
gasoline engine.
The
Unit
will
produce
a
dc
output
for
Shielded Metal
Arc
(SMAW)
Welding
when
used
as a
welding
generator,
or
an ac
output
of
7.5
kva
at
120/240
volts when used
as
a
power
generator.
A
duplex
receptacle
on
the front
panel
provides
an
ac
output
of
up
to
3
kva
at
120
volts
to
power
toolt,
lights,
etc.,
while
welding.
This
welding
generator
has
reconnectable
capability
to
provide
240
volts
ac
auxiliary
power
at
the front
panel
if
the
optional
receptacle
kit is
ordered.
Should
preparation
and
installation
(or
information
if
factory
installed)
be
desired,
see
Section
5-9 for
complete
instructions,
and
delete all
reference
to
120
volts
ac
duplex
receptacle
and
replace
with
240
volts
dc
duplex
receptacle.
2-4.
SAFETY
Before
the
equipment
is
put
into
operation,
the
safety
sec
tion
at
the
front
of
this
manual should be
read
completely.
This will
help
avoid
possible injury
due to
misuse
or
improper
welding
applications.
The
following
definitions
apply
to
CAUTION.
IMPORTANT.
and
NOTE
blocks
found
throughout
this manual:
CAUTION
Under
this
heading,
installation,
oper~g,
and
main
tenance
procedures
or
practices
will
be
found
that if
not
carefully
followed
may
create
a
hazard
to
per
sonnel.
Figure
2-2. Functional
Diagram
m
OM-457
Page
5

I
I
merit.
IMPORTANT
U
U
NOTE I
SECTION
3
-
INSTALLATION
3
-
1.
LOCATION
(Figure
3-1)
A
proper
installation
site
should
be
selected
for
the
welding
generator
if
the
unit is
to
provide dependable
service,
and
remain
relatively
maintenance free.
I
F~O~TANT
II
this
welding
generator
is
to
be mounted
on
a
trailer
(optional),
enture
that
the
engine
end
is
mounted
toward
the
front
(hitch end)
of
the trailer
to
maintain
proper weight
distribution. Also
ensure
that the
torque
weight
of
the trailer
is
5
to
10% of
the
gross
vehicle
weight.
It is
recommended
that
a
properly
fitting
canvas cover
(optional)
be
placed
over
the
welding
generator
when not
in
operation
to
protect
the
unit from the
environment.
L
CAUTION
U
If
this
unit
is
to
be
operated
indoors,
it
should be
located
in
a
place
where
the
exhaust
fumes from
the
engine
can
be
vented
out
of the
building.
Failure
to
comply
with
proper
venting
may
result
in stjrious
bodily
injury
or
loss of life.
;~=ANT;
I
The
engine
exhaust
system
on
this
welding
generator
has not
been
equipped
with
a
spark
arrestor
unless
it
was
specifically
ordered
as
an
optional
accessory.
A
spark
arrestor,
maintained
in
effective
working
order,
is
mandatory
if
this
welding
generator
is
to be
operated
in
a
National
Forest,
or
on
California
Grasslands, brush,
or
forest covered land
(see
Section
4442
of
California
Public
Resources
Code).
For
other
areas,
check
your
state
and
local laws.
A
proper
installation
site
permits
freedom of
air
movement
into and
out of
the
welding generator,
and
also
least
subjects
the unit
to
dust,
dirt,
moisture,
and corrosive
vapors.
A
minimum
of
18
inches of unrestricted
space
must be
maintained between the
welding
generator
front and
rear
panels
and
the nearest
obstruction.
Also,
the
underside
of
the
welding
generator
muss
be
kept
completely
free
of
ob
structions.
The
installation site should
also
permit
easy
removal
of
the
outer
enclosure
for maintenance
functions.
Do
not
place
any
filtering
device
over
the
intake
air
passages
of
the
welding
generator
as
this
would restrict
the
volume of
intake
air and
thereby
subject
the
internal
components
to
an
overheating
condition and
subsequent
failure.
Warranty
is
void
if
any
type
of
filtering
device
is
used.
On
most
welding
generators
a
lifting
device
is
provided
for
moving
the unit.
However,
if
a
fork lift
vehicle
is
used
for
lifting
the
unit,
be
sure
that
the
lift forks
are
long
enough
to
extend
completely
under
base.
of
lift
f
short
e
xte
nd
o
ut
of
the
opposite
side
of
the base
will
expose
internal
compon
ents
to
damage
should
the
tips
of
the
lift forks
pene

trate
the
bottom
of
the
unit.
3-2.
WELD
OUTPUT
CONNECTIONS
(Figure
3-2)
To
obtain the
full
rated
output
from
this
unit,
isis
necessary
to
select,
install,
and
maintain
proper
welding
cables.
Failure
to
comply
in
any
of
these
areas
may
result
in
less
than
satisfactory
welding
performance.
Ensure
that
the unit
is
completely
~own
before

~iaking
any
weld
output
connections.
1
A.
Location
The
POSITIVE
and
NEGATIVE
weld
output
terminals
are
located
on
the
lower
portion
of
the front
panel.
Open
the
lower
front
access
door.
Route the
weld
cables
between
the
two
horizontal
pieces
of
angle
iron
on
the
front
of
the base
(see
Figure
3-2)
and
connect
the
cables to the
weld
output
terminals.
Secure
the lower
access
door.
Under this
heading,
installation,
operating,
and
main
tenance
procedures
or
practices
will
be
found
that
if
not
carefully
followed
nay
result
in
damage
to
equip-
Under this
heading,
explanatory
statements
will be
found
that
need
special
emphasis
to
obtain
the
most
efficientoperation
of the
equipmrrnt.
I
I
I
Figure
3-1.
Dimensional
Drawing
TA-004
285
U
U
I
I
Holes
are
provided
in
the
base
for
mounting
purposes.
Figure
3-1
gives
overall
dimensions and the base
mounting
hole
layout.
NOTE
If
the
welding
generator
is
equipped
with
a
POLAR
ITY
SWITCH
(Optional),
the
weld
output
terminals
i
are
labeled
ELECTRODE
and
WORK.
1
Page
6

B.
Welding
Cables
If
welding
cables
were
not
ordered
with this
unit,
the
steps
listed should
be
followed
to
ensure
the best
welding
performance:
1. It
is
recommended that the
welding
cables be
kept
as
short
as
possible,
be
placed
close
together,
and be of
adequate
current
carrying capacity.
The
resistance
of
the
welding
cables
and
connections
causes
a
voltage
drop
which is
added
to
the
voltage
of
the
arc.
Excessive
cable
resistance
may
result in
overloading
as
well
as
reducing
the
maximum
current
output capability
of
this
unit.
Proper
operation
is
to
a
great
extent
dependent
on
the
use
of
welding
cables and connections that
are
in
good
condition and of
adequate
size.
An
insulated electrode
holder
must
be
used
to
ensure
the
operators
safety.
2.
Use Table
3-1
as
a
guide
for
selecting
correct
cable size for
the
anticipated
maximum weld
current
which will
be
used.
Table
3-1
shows
total cable
length,
which includes
the
electrode and
work
cable.
Example:
If
the
electrode
holder cable
is
75 feet
long
and the work
cable
is
25 feet
long,
select the size
cable
that
is
recommended for 100
feet
at
the
maximum
weld
current
that is
to
be used.
3.
Do
not
use
damaged
or
frayed
cables.
4.
Follow
the
electrode holder manufacturers
instructions
for
installing
the electrode
holder
onto
the
electrode
cable.
5.
Use correct
lugs
on
the
weld
cable
to
connect
the work
clamp
and
to
connect
the
cables to
the
weld
output
terminals.
Install the
cables to
the
output
terminals
according
to
Section
3-2A.
6. Ensure that all connections
are
clean
and
tight.
Table
3-1.
Welding
Cable
Size
WELDING
TOTAL
LENGTI-IOF
CABLE
ICOPPE RI
IN
WELD CIA
CUlT
AMPERES
50 100 150
200
250
300 350
400
100
44
2
2
2
1
1/0
1/0
150
22 2
1
1/0
2/0
3/0
3/0
200
1
11
1/0 2/0 3/0
4/0
4/0
250
1/0
1/0 1/0
2/0 3/0 4/0
4/0
2-2/0
300
2/0
2/0
2/0
3/0
4/0 4/0 2-2/0
2-3/0
350
3/0
3/0
3/0
4/0
4/0
2~2/O 2-3/0
2-3/0
400
3/0
3/0
3/0
4/0
2-2/0
2-3/0 3-2/0
2-4/0
500
4/0
4/0
4/0
2-2/0 2~3/0
2-3/0
24/0
3-3/0
A-002
702-A
NOTE.
A,
5OFEETOR LESS.
B.
CABLE SIZE
IS BASED ON DIRECT CURRENT
lDCl,
100% DUTY CYCLE
AND
EITHER
A
4
VOLTS OR
LESS
DROP OR
A
CURRENT
DENSITY
OF
NOT OVER 300
CIRCULAR
MILS
PER
AMP.
C.
WELD
CABLE
INSULATION
WITH
AVOLTAGE
RATING TO
WITHSTAND THE OPEN-CIRCUIT
VOLT
AGE
(CCV)
OF
THE
WELDING
GENERATOR
MUST BE
USED. WHILE
MOST
WELDING
GENERATORS
HAVE
AN
OPEN-CIRCUIT VOLTAGE
OF
LESS
THAN 100
VOLTS.
SOME WELDING
GENERATORS
OF
SPECIAL
DESIGN
MAY
HAVE HIGHER OPEN-CIRCUIT
VOLTAGE.
3- 3.
EQUIPMENT
GROUNDING
TERMINAL
(Figure
3-2)
Normally,
engine-driven
Welding
generators
do
not
require
grounding.
However,
since this unit has
auxiliary
power
plant
capability,
grounding
of
the
frame
and
case
may
be
required,
A
grounding
terminal has
been
provided
on
the
front
panel
for this
purpose
(see
Figure
3-2).
For
detailed
grounding
instructions consult
your
local
or
state
codes
or
the latest
issue
of
the National Electrical
Code.
3-4. REMOTE
AMPERAGE
CONTROL CONNECTIONS
(Figure
5-1)
The
REMOTE
AMPERAGE
CONTROL
receptacle,
located
on
the
front
panel
of the
welding
generator
provides
a
junction
point
for
connecting
a
Remote
Amperage Control
to
the
amperage
control
Circuitry
in the
unit.
To
Connect
the
Remote
Amperage
Control
to
the
REMOTE
AMPERAGE CONTROL
receptacle,
insert the
three-prong
plug
from
the
remote
control into
the
receptacle
and rotate
the
plug
as
far
as
it will
turn
in
clockwise direction.
Once
fully
rotated,
the
plug
will be locked
in
the
receptacle
and
will
not
pull
Out
under
stress.
3-5.
120/240
VOLTS
AC
TERMINALS
(Figure
3-3)
the h
igh
pote
nt
ial
t hat
is
p
rese
nt at t he
120/240
volts
ac
terminals while
the
welding
generator
is
operating,
it is
recommended
that
connections
to
the
120/240
volts
ac
terminals
be made
only
by
a
licensed
electrician
to avert
any
chance of
personal
injury
due
to
faulty
installation.
Never
attempt
to
make
connections
to
the
120/240 volts
ac
terminals
while the
engine
is
operating.
The
120/240
volts
ac
terminals
act
as a
junction
point
for
connecting
accessory
equipment
to
the
7.5
kva,
120/240
volts.
50/60
Hertz
power
plant.
The
power
that
can
be
obtained
at
these terminals
may
be used
to
provide
standby
service
to
rural,
residential,
or
other
buildings requiring
120/240
volts
3
wire connection.
CAUTION
I
Do
not
change
fuses
or
Connect
any
leed
wires
while
engine
is
running.
Install Circuit
grounding
jumper
lead
if
NEC
or
local electrical code
requires
grounded
neutral conductor,
Insert load
lead wires
through
pro
per
cord
grip
box
connector.
Strip
1/2
inch insulation
and connect to
proper
load
terminals and
tighten
con
nectors
securely.
The
connections shown
in
this
figure
are
for dc
Straight
polarity.
Figure
3-2.
Weld
Output
Connections
TB-004 282-A
Figure
3-3.
Power Plant
Connections
I
I
.
OM-457
Page
7

Figure
3-4. AC Power Curve
For
120/240
Volts AC
Terminals
SECTION
4
-
ENGINE
PREPARATION
1
Fl F
I
See
the
Engine
Manufacturers
manual
(F-i
63
Engine)
for
complete
engine
care.
4-1. LUBRICATION
This
engine
was
shippAd
from
the
factory
with
its
crankcase
filled
with the
correct amount
and
type
of
break-in
oil
unless
otherwise ordered.
Check
the
oil level before
attempting
to
operate
the
engine.
It
should
be
up
to
the
FULL
mark
on
the
bayonet
type
indicator. Add
a
quality
brand of
oil if
the
oil
level
is
low. See
the oil
selection
chart,
Table
9-1,
in
Section
9.
Figure
4-1. Oil
Level
Indicator
L–~RTANT~ I
New
engines
have
very
close clearance between
their
moving
parts.
Thus,
it
is
recommended that
loading
of
the
engine
be
kept
to
a
minimum
during
the first 50
hours of
operation.
Be
sure
to
check the
oil
level
several times each
day
during
the
engine
break-in
period.
This
engine requires
about
50
hours
of
running
time
before
it will be
fully
broken
in.
After about 50
hours
of
running
time,
drain the
break-in oil
and
change
the
oil filter.
See
the
oil
selection
chart,
Table
9-1,
in
Section 9
for
correct
oil
type
and
grade
to
use
after
the
break-in
oil is
drained.
The
liquid
capacity
of
the
coolant
system
in
this
welding
generator
is
9
quarts
(U.S. Measure).
This
unit
is
shipped
from the
factory
with the
proper
amount
of
water
and anti
freeze
to
permit
operation
of
the
unit
at
temperatures
down
to
0F.
I
. .
~i~RTANTI
-
1
If this
welding
generator
is
to
be
operated
in
tem
peratures
which
are
below
0F,
additional
anti-freeze
will
have
to be
added
to
the
coolant
system
or
the
liquid
in
the
system
will
freeze
and
thus
cause
the
engine
to
overheat.
I
I
The
coolant
system
is
equipped
with
a
180F
thermostat.
If
the
thermostat should-become
defective,
be
sure
the
replace
ment
is
of
equal
temperature
rating.
Do
not
run
the
engine
with
a
defective
thermostat
or
without
one.
If this
is
done,
the
engine
will
run
cold
and
develop
excess
carbon
accumulation and
the oil
will
become
contaminated
with
excessive
sludge
and
dirt.
I
The
radiator for
this
engine
is
equipped
with
a
pressurized
cap
which
is
rated at
7
psi.
If this
cap
is
ever
replaced,
ensure
that
the
replacement
cap
has
a
rating
of
7
psi.
~on
a
hou
Id be
ax
ercised
at
all
times
wi~en
re
moving
the radiator
pressure
cap.
The
cap
will
turn
to
an
almost full
open
position,
at which
point
a
pro
vision
has been made
to
permit
veuiting
built
up
pres
sure
within
the radiator. Allow the
pressure
to
escape
before
completely
removing
the
cap
from the radiator
neck.
When
removing
the
cap,
it
is
recommended that
-
a
glove
or
rag
be
used
to
protect
the
operators
hand
from
possible
exposure
to
extremely
hot
coolant.
PREPARING
NEW BATTERY FOR
SERVICE
Wet
Charged
Battery
The
wet
charged
battery
is
shipped
with the
electrolyte
solu
tion added
and
normally
in
an
operational
status.
However,
due
to
long
periods
of
idleness,
the
battery
may
become
weak
and
thus
require
charging.
The
battery
should
have
a
specific
gravity
reading
of
1.260
(at
80F)
before
operation.
If this
level
is
not
present
when
it is
to
be
used,
charge
the
battery
as
instructed
in
Section
4-3A,
step
4.
m
I
I
The
FINE
AMPERAGE
control
must
be rotated
to
the
100
(full
counterclockwise)
position
whenever the
120/240 volts
power
plant
is
being
utilized.
I
I
The
voltage
will
vary
in
accordance
with
the
load
applied
to
the
120/240
volts terminals.
The
voltage
at
various loads
may
be
determined from
Figure
3-4.
260
U,
250
7.7SKVA
I.SKVA
240
230
14.3
KVA
~
220
~
16.1 KVA
210
200
0
10
20 30 40 50
60
70
80
90
100
110
120
~ POWER
.MPERES
8-005
185
Keep
Crankcase Oil
At
This
Level
U
Never
Operate
Engine
With
Oil
Below This
Level
TA-900 033-3.1
I
I
4-3.
A.
4-2. COOLANT SYSTEM
IMPORTANT

Do
not
attempt
to
operate
the
engine
without
the
battery
connected.
Also,
do
not
attempt
to
remove
the
battery
while the
engine
is
running.
Page
8

4-4.
AIR
CLEANER
NOTE
If the
battery
does
not
require
any
additional
charg
ing,
the
only step
required
to
place
the
battery
into
operation
is
to
connect
the
negative
()
battery
cable
to
the
negative
() terminal
on
the
battery.
B.
Dry
Charged
Battery
This
battery
is
shipped
in
a
dry
state.
To
prepare
the
new
battery
for
operation,
it
will
be
necessary
to
obtain
electro
lyte,
proceed
as
follows:
Put
on
protective
eye
cover
and
clothing
prior
to
pour
ing
the
electrolyte
solution.
1. Remove
the
battery
from
the
unit
and
place
it
on
a
level
work
table
or
other
suitable
area.
2.
Fill the
battery
cells
to
the
required
level
with
electrolyte.
3.
Place
a
battery
thermometer
in
one
of
the center calls
and
check the
specific
gravity
of
each
cell
with
a
battery
hydrometer.
4.
The
battery temperature
must be
80F
and
the
specific
gravity reading
1.260
prior
to
installation.
If
both condi
tions
are
not
met,
charge
the
battery
following
the
in
structions below:
to cha
rging
t he
batte:
the
baft
ery
caps
m!st
be
removed.
Failure
to
remove
the
caps
could
result in
the
battery
exploding
should the
battery
be
over
charged.
a.
Use
an
automotive
type
battery
charger.
This
battery
should
be
charged
at
about
a
3.5
ampere
rate
until
correct
electrolyte
conditions
are
met.
Lower
charging
rates
can
be
used; however,
the time
to obtain
the
correct
electrolyte
conditions
will
be
longer.
The air
cleaner
this
engine
is
equipped
with,
is
a
dry
element
type
with
a
replaceable
filter element.
The
air
cleaner
re
quires
no
initial
service.
4-5. FUEL
Figure
4-2 illustrates
typical
fuel
consumption
under
specific
load
conditions.
Fuel
consumption
will
vary
from
one
engine
to
another.
Different
brands
of
fuel,
operating
conditions,
condition
of
the
engine,
and
many
other
conditions
will
af
fect
the fuel
consumption
of
this
engine.
_j
IC
~
0
U
-J

1.0 2.5
4.0 6.0 9.0 12.0
POWER
KVA
AT
100% DUTY CYCLE
(I! AVAILAILI)
Figure
4-2.
Fuel
Consumption
Chart
1IIC~UiR.
Do
not
attempt
to
fill
the
fuel
tank
with the
engine
running.
Do
not
fill the fuel tank
completely
as
cold
fuel will
expand
when
exposed
to
outside
temperature
in
a
warm
climate
or
to
engine
heat,
If the
thnk
is
too
full it
will
overflow
causing
a
potential
fire
hazard.
Never
allow
fuel
to
drain
on
the
engine
or
other
com
ponents.
b.
When the
battery
is
charged,
disconnect
it
from
the
charger
and
re.check the
electrolyte
level. Add
if
necessary.
Install the
battery
caps.
c.
Rinse
the
empty
electrolyte
containers
with
water
before
discarding.
Since
battery
acid
is
corrosive
to
metals,
do
not
pour
into
a
metal
sink
or
drain.
Rinse
and
mutilate
the
empty electrolyte
container
before
discarding.
If
acid
has
accidentally
spilled
on
the bat
tery
or
work
area
during filling
or
charging,
flush
off
with
clear water and neutralize with
soda
or
ammonia
solution. Use the
same
procedure
if
add
is
spilled
on
clothing.
5. Re-install the
battery
in
the
unit
making
sure
that the
negative
()
terminal
of
the
battery
is connected to
the
negative
()
battery
cable.
The
fuel tank
is
equipped
with
a
trap
area
in
the bottom
of
the
tank,
therefore;
the tank
will
not
go
completely
dry.
This
trap
holds
water
and
dirt back
from
the
engine.
A
drain
plug
is
located
on
the
left,
bottom
of the tank
to
drain
water
and
dirt
from the
tank
if
it
should become
necessary.
I
I
IMPORTANT
Use
a
good
grade
of
regular
gasoline,
rated
at
least
at
85
octane,
for
this
engine.
Fuels
of lower
octane
ratings
may
cause
detonations
(knocking)
which could
result
in
damage
to
the
engine.
The
fuel
capacity
of
the
fuel tank
is
17.5
gallons
(U.S.
Measure).
I
I
.
I
11.35
10.4
9.46

8.52
7.57
6.62
5.67
4.73
3.78
2.84
1.98
.95
2.5
2.29
2.08
1.87
1.7
1.46
1.25
1.04
0.83
0.62
0.4
0.21
3.0
2.75
2.5
2.25
2.0
1.75
1.5
1.25
1.0
0.75
0.5
0.25
50 100
150 200
250
300 350
400
D.C.
WELD
AMPERES AT
100
DUTY
CYCLE
WELD
6-005
606
OM-457
Pa~
9

SECTION
5-FUNCTION
OF
GENERATOR
CONTROLS
The
contacts of the
FINE AMPERAGE
control
are
of
the
continuous
contact
type,
thereby
making
it
possible
to fine
adjust
the
amperage
output
while

i
welding
The
scale
surrounding
the
FINE
AMPERAGE control
is
calibrated from
0
to
100
percent
in
increments of
ten.
Due
to
this
percentage
calibration,
it
should
be
noted that
if
the
operator
is
using
this scale
to
select
a
fine
amperage
setting,
the
operator
is
selecting
a
percentage
of the
coarse
range
in
use
and
not an
actual
amperage
value.
I
The
FINE
AMPERAGE
control
must
be
rotated
to
the
100
(full
counterclockwise)
position
whenever
the
120/240
volts
power
plant
is
being
utilized.
The
FINE
AMPERAGE
control
may
be
in
any
position
when
using
the
120
VOLTS
AC
duplex
receptacle
on
the
front
panel.
Fi~jre
5-1.
Generator
Controls
TB-004
284
5.
1.
120
VOLTS
AC
RECEPTACLE
(Figure
5-1) (For
Optional
240 Volts
AC
Receptacle,
See Section
5-9)
Up
to
3
kva of 120
volts
ac
50/60
Hertz
power
is
available
at
this
duplex
receptacle
for
operating
120
volts
ac or
120
volts
universal
power
tools
etc.,
when the
welding
generator
is
being
operated
at
weld
rpm.
The
ac
power
output
voltage
will
decrease
in accordance
with
the load
applied
to
power
connections.
280 140
I
U
260
130
>
240
120
220 110
~
200 100
0
0
20
30
40
AC
POWER
AMPERES
AT
120V.
5
10
15
20
AC
POWER
AMPERES
AT
240V.
B-005
192-A
Figure
5-2.
AC Power
Curve For
120
(And
Optional
240)
Volts
AC
Receptacle
5-2.
RANGE
SWITCH
(Figure
5-1)
The
Range
switch
permits
selection
of five
different
amper
age ranges.
Each
of
the
five
switch
positions
has
its
amperage
range
indicated
on
the scale
above
the
Range
switch
handle.
5-4.
REMOTE AMPERAGE
CONTROL
(Figure
5-1)
If
a
Remote
Amperage
Control
is
to
be
used,
make
connec
tions
from
the
control
to
the
REMOTE
AMPERAGE
CON
TROL
receptacle
as
instructed
in
Section 3-4.
When
remote
control
of
the
amperage
is
desired,
it
is
essential
that the
REMOTE AMPERAGE
CONTROL
switch be
placed
in
the
REMOTE
position.
Likewise,
if
a
Remote
Amperage
Control is
not
to
be
utilized,
the
switch
must
be
in
the
STANDARD
position.
When
in
the STANDARD
position
only
the
FINE
AMPERAGE
control
on
the
front
panel
will
control
the
amperage.
When
a
Remote
Amperage
Control
is
being
used,
the
remote
control
is
functioning
as
a
fine
amperage
adjustment
of
the
FINE
AMPERAGE
control
setting
on
the
WELDING
genera
tor.
For
example:
If
the
FINE
AMPERAGE
control
on
the
welding
generator
is
set
at the
50%
position,
the
Remote
Amperage
Control
will
provide
(from mm.
to
max.
positions)
fine
amperage
adjustment
of
one
half
of
the
welding
generator
output
for
the
range
selected
by
means
of
the
Range
switch. If
full
adjustment
of
the
range
selected
is
desired,
the FINE
AMPERAGE
control
on
the
welding
generator
must
be
set
at
100%
(max.
position).
5-5. VOLT-AMPERE
CURVES
(Figur~5-3)
0
100 200 300 400 300 600
DC
AMPIIIS
Figure
5-3.
Volt-Ampere
Curves
B-005 130
The
volt-ampere
curves
show the
output
voltage
and
current
of
the
welding
generator
available at
any
point
from
the
minimum
to
maximum of each
coarse
range.
The
FINE
AMPERAGE
control,
controls
the
output
between
the
minimum
and
maximum
curves
of
each
coarse
range
that
is
shown.
Load
voltage
is
predetermined
to
a
large
extent
by
the
arc
characteristics.
With
the
use
of
the
volt-ampere
curves
it is
possible
to determine
what
the
weld
current
will
be at
a
particular
arc
voltage.
Remember,
the
volt-ampere
curves
tMPORTANT
I
U
Do
not
change
the
position
of
the
Range
switch
while
welding
or
under
load,
as
this
causes
arcing
across
the
contacts
of
the
switch.
This
arcing
causes
the contacts
to
become
pitted
and
eventually inoperative.
U
I
5-
3. FINE
AMPERAGE CONTROL
(Figure
5-1)
The
FINE
AMPERAGE
control
permits
the
operator
to
select
an exact
welding
amperage.
This
control allows
adjustment
of
the
welding
amperage
from
minimum
to
maximum
of the
coarse
amperage
range
selected
by
the
Range
switch.
Page
10