Miller Electric OM-229 038D manual Volt-Ampere Curves, Installing Gas Supply, Model

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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 221

Model 253

MAX

MIN

3-4. Installing Gas Supply

1

Argon Gas

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.

2Gas Hose Connection

3Flow 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.

OR

2 3

CO2 Gas

Ref. ST-148 265-B / Ref. ST-149 827-B / Ref. ST-158 697-A

OM-229 038 Page 9

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Contents Processes OM-229 038D 2007−04Description From Miller to You Table of Contents Standards DirectivesMarks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers Electric shock can kill − DefinitionsFalling unit can cause injury Weee Label Specifications − InstallationDuty Cycle And Overheating Volt-Ampere Curves Installing Gas SupplyModel Positoning Jumper Links 230/400V 3-Phase Models Installing Wire Spool and Adjusting Hub TensionPhase Electrical Service GuideTools Needed = GND/PE Earth Ground Drive Roll Installing Drive Rolls and Wire GuideScale Threading Welding Wire and Adjusting Pressure Roll TensionSetting Gun Polarity for Wire Type Optional Using Gun/Cable Holder− Operation Burnback and Spot Weld Timer ControlsControls for Migmatic 221/253 Routine Maintenance − Maintenance &TROUBLESHOOTINGCircuit Breaker CB1 Unit OverloadTrouble Remedy TroubleshootingOM-229 038 Circuit Diagram for Migmatic − Electrical DiagramsCircuit Diagram for Migmatic 253 400 VAC Wrapper Assembly, All Models − Parts ListPart Description Quantity Main Assembly for Migmatic Dia Part Mkgs Description Quantity Main Assembly for Migmatic Dia Part Quantity Mkgs Description 230V 400V Wire Diameter Drive Roll Wire Guide Drive Roll And Wire Guide Kits 2 Roll ModelsFraction Page Page Effective January 1 ITW Welding Products Italy S.r.l. Via Privata Iseo, 6/E Owner’s Record