Installing Gas Supply - Miller Millermatic 140 Auto-Set Owner's Manual

4-6. Installing Gas Supply

.
DO NOT use Argon/Mixed gas regulator/flowmeter
with CO shielding gas. See Parts List for optional
2
CO gas regulator/flowmeter and hose.
2
7
6
Feedhead Pressure Assembly Open
Feedhead Pressure Assembly Closed
OM-225 311 Page 16
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A complete Parts List is available on-line at www.MillerWelds.com
4
5
1
2
3
Argon Gas Or
Mixed Gas
Tools Needed:
5/8, 1-1/8 in.
Ref. 802 028 / 246 037-A / Ref. 802 982-A / Ref. 243 861-A
Obtain gas cylinder and chain to
running gear, wall, or other
stationary support so cylinder
cannot fall and break off valve.
1 Cap
2 Cylinder Valve
Remove cap, stand to side of valve,
and open valve slightly. Gas flow
blows dust and dirt from valve.
Close valve.
3 Cylinder
4 Regulator/Flowmeter
Install so face is vertical.
5 Regulator/Flowmeter Gas
Hose Connection
6 Welding Power Source Gas
Hose Connection
Connect supplied gas hose
between regulator/flowmeter gas
hose connection, and fitting on rear
of welding power source.
7 Flow Adjust
Flow rate should be set when gas is
flowing through welding power
source and welding gun. Open
feedhead pressure assembly so
that wire will not feed. Press gun
trigger to start gas flow.
Typical flow rate is 20 cfh (cubic
feet per hour). Check wire
manufacturer's recommended
flow rate.
After flow is set, close feedhead
pressure assembly.