Miller MTL-20 Torches Manuel du propriétaire - Page 8

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3-3.
Connecting
Torch
_~\
~
READ SAFETY BLOCKS
at
beginning
of manual before
proceeding.
BUILDUP OF SHIELDING GAS
can
harm health
or
kill.
Shut off
shielding
gas
supply
when
not in
use.
warnl.1
9/91
Turn Ott
welding
power
source,
and disconnect
input
power before
installing
torch.
Obtain the
following
hoses:
1
Gas Hose With 5/8.18
Right-
Hand
Fittings
2
Coolant Hose With 5/8-18
Left-Hand
Fitting
Connections:
3
Regulator/Flowmeter
4
Gas
Cylinder
5
Welding
Power Source
6
Gas-In Hose
7
Gas Valve
Valve controls gas
preflow
and
postflow.
Preflow aids
arc
starting.
Preflow and
postflow prevent
elec
trode from
forming
a
black surface
(oxidizing).
After
welding,
allow 10 seconds of
gas
postflow
for every 100
am
peres of weld
current.
8
Coolant-In Hose
9
Power Cable/Coolant-Out
Hose
10
Power Cable
Adapter
Connect
hoses
to
adapter
before
connecting adapter
to
weld
output
terminal.
11
Cooling System
Mix coolant
according
to
cooling
system
owners
manual.
Torch is rated
at 1
qtimin (0.94U
mm)
coolant flow rate. Maintain
proper flow
rate at all
times.
12
Input
Power
Plug
13
Grounded AC
Receptacle
Connect
plug
to
proper
receptacle.
14
Work
Clamp
Connect work
clamp
to
a
clean,
paint-free
location
on
workpiece,
as
close
to
weld
area as
possible.
Use wire brush
or
sandpaper
to
clean metal
at
weld
joint
area.
~
5/8,
7/8
in
Ref.
$T-800
454
Figure
3-3.
Connecting
Torch
If
applicable,
install
high-frequency
unit.
14
11
Tools Needed:
OM-1568
Page
4