Miller Electric MS Weld Control Owner's Manual page 9

Circuit
Breaker
Shielding Gas
Output ~Receptac1e
Shielding
Gas
Input Receptacle
Remote Gas Control
&
Remote Fixture Start
Receptacle RC
1
\
Figure 2-2. Front Panel and Bottom View
CAUTION
Ensure that the 115 volts
ac
power
Su~nd welding
power source are
deenergized before electrical
con
nections
are
made. Do
not connect
the conductors
to
the 115 volts
ac power
supply
and
welding
power
source
until
all electrical connections have been made
totheweldcontrol.
2-2. ELECTRICAL
INPUT. CONTACTOR CONTROL.
AND VOLTMETER CONNECTIONS (Figure 2-2)
A. Weld Control Connections
Insert
plug
PLG3
into the weld control receptacle RC3. Ro
tate
the plug threaded
outer
ring clockwise
Onto
the recep
tacle threaded body
as
far
as
possible. This action will
secure
the
plug
in the
receptacle.
B. Electrical Input Connections
Connect the supplied electrical input cord, labeled 115,
to
the 115 volts
ac,
single phase, 60 hertz
power
supply.
It is
recommended that the
welding
power
source
115
vac recep
tacle be used
as
the
115
vac power
supply. Connect the
two
input conductors, colored white and black,
to
the 115 volts
ac power
supply and
connect
the ground
conductor,
colored
green,
to
a proper
ground.
Use whatever
grounding
method
that is acceptacle
to
the
local electrical inspection authority.
The green
ground conductor is
connected
to
the weld
control chassis and is for grounding
purposes
only. Do
not
connect
the green ground
conductor
to
any
one
of
the 115 volts
ac power
supply
terminals
as
this will
result in
an
electrically
hot weld control chassis.
C. Contactor Control And Voltmeter Connections
Locate the supplied
contactor
control and voltmeter cord,
labeled CONTACTOR~ Connect the
two contactor
control
conductors,
colored white and black,
to
the welding
power
source contactor
Control circuitry.
Connect the voltmeter
conductor, colored
green,
to
the welding
power source
negative (-) secondary terminal.
2- 3. SHIELDING GAS CONNECTIONS (Figure 2-2)
Connect
a
hose of suitable length and construction from the
shielding
gas
supply
to
the weld control GAS
-
FROM SUP-
PLY
gas
receptacle.
Connect the
supplied hose from the weld
control GAS
-
TO WELD HEAD
gas
receptacle
to
the gun gas
receptacle. Both of the weld control
gas
receptacles
have
5/8-lB right-handed threading.
2.4. SECONDARY CONNECTIONS (Figure 2.2)
Connect cables
of suitable length, size, and construction
between the following points:
A. Welding
power source
positive (+) secondary
terminal
to
weld control positive (+) secondary
terminal.
B. Weld control negative
(-)
secondary terminal
to
gun
secondary terminal.
C. Welding
power source
negative (-) secondary
terminal
to
weidment
(workpiece).
Refer
to
the
welding
power source
Owners
Manual for
suitable cable size and Construction. The weld control
secondary
terminals
are
112
in diameter
so
corresponding
size cable
connectors
should be used
at
these
points.
2- 5. WELD HEAD CONNECTIONS (Figure 2-2)
Insert plug
PLG4
into the weld control receptacle RC4.
Rotate the plug threaded
outer
ring
clockwise Onto the recep
tacle threaded
body
as
far
as
possible.
This
action will
secure
the
plug
in the
receptacle.
Insert PLG from the weld head into
receptacle
AC. Rotate
the plug threaded
Outer
ring
clockwise
Onto
the receptacle
threaded
body
as
far
as
possible.
This action will
secure
the
plug in the receptacle.
2-6. REMOTE GAS CONTROL & REMOTE FIXTURE
START CONNECTIONS (Figure
2.2)
If
remote
control of
a
shielding
gas valve
or
relay is desired,
connect
the leads from the gas valve
or
relay to pins
C and D
of plug PLG1. This valve
or
relay
must
be able
to operate
with .25
amp or
less
@ 115
volts
ac.
This valve
or
relay
will
be energized and deenergized in unison with the gas valve
GS1 within the weld
control.
If
remote
control of
a
fixture relay is desired
connect
the
leads from the
relay
to
pins A and B of
plug
PLG1. This
relay
must
be able
to operate
with .5 amp
or
less @ 115 volts
ac.
This relay will be
energized and deenergized in unison with
the weld head
motor.
Insert
plug
PLG1 into weld control receptacle RC1 and
rotate
the plug
Outer
threaded ring clockwise
onto
the
recep
tacle threaded body. This action will
secure
the plug in the
receptacle.
Remote
Start, Stop,
& Emergency
Stop
Receptacle RC2
________
115 VAC
Input,
________________
Voltmeter, &
-o c~ '~
Contactor Control
~
1 1
Receptacle Rc3
Negative
Secondary
Terminal
Emergency
Stop
Switch
Positive
Secondary
Terminal
Weld
H~a d
Receptacle
RC4
TB-079 064-1
U
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