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OM-229 038 Page 9
3-3. Volt-Ampere Curves
The volt-ampere curves show the normal minimum and maximum voltage and amperage output capabilities of the welding power source. Curves
of other settings fall between the curves shown.
Model 253
MIN
MAX
Model 221
3-4. Installing Gas Supply
Ref. ST-148 265-B / Ref. ST-149 827-B / Ref. ST-158 697-A
2
CO
2
Gas
1
Argon Gas
OR
3
Chain gas cylinder to running gear,
wall, or other stationary support so
cylinder cannot fall and break off
valve.
1 Regulator/Flow Gauge
Install so face is vertical.
2 Gas Hose Connection
3 Flow Adjust
Typical flow rate is 0.9 liters per
minute. Check wire manufactur-
er’s recommended flow rate. This
flow gauge can be adjusted be-
tween 2.36 and 11.8 liters per min-
ute.