Miller Electric UNITOR UWI 400 Specifications

ProcessesDescriptionTIG (GTAW) WeldingStick (SMAW) WeldingOM-244 324C2013−01Arc Welding Power SourceUNITOR UWI 202CE

OM-244 324 Page 6When power is applied failed parts can explode or cause other parts to explode.Safe26 2012−05Always wear long sleeves and button your

OM-244 324 Page 72-2. Miscellaneous Symbols And DefinitionsAAmperes Panel−LocalGas Tungsten ArcWelding (GTAW)Shielded Metal ArcWelding (SMAW)VVolts Vo

OM-244 324 Page 8SECTION 3 − INSTALLATION3-1. Important Information Regarding CE Products (Sold Within The EU)A. Information On Electromagnetic Fields

OM-244 324 Page 93-5. Volt-Ampere CurvesVolt-ampere curves show minimumand maximum voltage and amper-age output capabilities of weldingpower source. C

OM-244 324 Page 103-6. Duty Cycle And OverheatingDuty Cycle is percentage of 10 min-utes that unit can weld at rated loadwithout overheating.If unit o

OM-244 324 Page 113-7. Selecting A Location1 Line Disconnect DeviceLocate unit near correct inputpower supply.! Special installation may berequired wh

OM-244 324 Page 123-8. Weld Output Terminals And Selecting Cable Sizes*! ARC WELDING can cause Electromagnetic Interference.To reduce possible interfe

OM-244 324 Page 133-10. TIG Lift-Arc DCEN (Direct Current Electrode Negative) Connections! Turn off power before mak-ing connections.1 Positive (+) We

OM-244 324 Page 143-11. Stick DCEP (Direct Current Electrode Positive) Connections! Turn off power before mak-ing connections.1 Negative (−) Weld Outp

OM-244 324 Page 15! Installation must meet all Nationaland Local Codes − have only quali-fied persons make this installation.! Disconnect and lockout/

TABLE OF CONTENTSSECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1...1-1. Symbol Usage 1...

OM-244 324 Page 16SECTION 4 − OPERATION4-1. Controls202 722-A / 802 8896Green on nameplate indicates a TIG func-tion, Gray indicates a Stick function.

OM-244 324 Page 174-2. Process Control1 Process ControlUse the Process control to selectthe Stick process (up), or the TIGLift Arc process (down).Stic

OM-244 324 Page 184-4. Stick Start Procedure − Scratch Start TechniqueWith Stick selected, start arc as follows:1 Electrode2 Workpiece3 ArcDrag electr

OM-244 324 Page 19SECTION 5 − MAINTENANCE AND TROUBLESHOOTING5-1. Routine Maintenance. Maintain more often during severe conditions.! Disconnect power

OM-244 324 Page 205-3. TroubleshootingTrouble RemedyNo weld output; unit completelyinoperative.Place line disconnect switch in On position (see Sectio

OM-2226 Page 21SECTION 6 − ELECTRICAL DIAGRAMSFigure 6-1. Circuit Diagram956 142 658T1J2FMJ3J4DL4TEMP.R2ARCFORCE/SLOPEJ7R6SHUNTJ1J1J10J11J2J3J3J5Z1J1R

OM-244 324 Page 22SECTION 7 − SELECTING AND PREPARING A TUNGSTENFOR DC OR AC WELDING WITH INVERTER MACHINESgtaw_Inverter_2011-06Whenever possible and

OM-244 324 Page 23SECTION 8 − GUIDELINES FOR TIG WELDING (GTAW)8-1. Positioning The TorchRef. ST-161 892110−2510−15623490453/16 in.1/16 in.65Bottom

OM-244 324 Page 248-2. Torch Movement During WeldingST-162 002-BTungsten Without Filler RodTungsten With Filler RodForm pool Tilt torch Move torch to

OM-244 324 Page 25SECTION 9 − STICK WELDING (SMAW) GUIDELINES9-1. Stick Welding Procedurestick 2010−02 − 151 593! Weld current starts whenelectrode to

DECLARATION OF CONFORMITY for European Community (CE marked) products. ITW Welding Products Italy S.r.l Via Privata Is

OM-244 324 Page 269-2. Electrode and Amperage Selection ChartRef. S-087 985-A3/321/85/323/167/321/41/165/643/321/85/323/167/321/43/321/85/323/167/321/

OM-244 324 Page 279-4. Positioning Electrode HolderS-006090 9010-30454510-301 End View Of Work Angle2 Side View Of Electrode Angle1122Groove W

OM-244 324 Page 289-7. Conditions That Affect Weld Bead ShapeS-0061SlowNormal Fast10 - 30DragToo ShortNormal Too LongSpatterAngle Too SmallAngle Too

OM-244 324 Page 299-9. Groove (Butt) JointsS-00621 Tack WeldsPrevent edges of joint from draw-ing together ahead of electrode bytack welding the mater

OM-244 324 Page 309-12. Weld TestS-0057-B1 Vise2 Weld Joint3 HammerStrike weld joint in direction shown.A good weld bends over but doesnot break.2 To

OM-244 324 Page 31Lack of PenetrationGood PenetrationLack Of Penetration − shallow fusion between weld metal and base metal.Possible Causes Corrective

OM-244 324 Page 32SECTION 10 − PARTS LISTFigure 10-1. Main Assembly. Hardware is common andnot available unless listed.1Fig. 10-2Fig. 10-4Fig. 10-3234

OM-244 324 Page 33QuantityDescriptionPartNo.Dia.Mkgs.ItemNo.Figure 10-1. Main Assembly1 208015 Handle 1... ... ...

OM-244 324 Page 34Figure 10-2. Panel, Front w/Components. Hardware is common andnot available unless listed.10987654321131211QuantityDescriptionPartNo

OM-244 324 Page 35Figure 10-3.Panel, Rear w/Components. Hardware is common andnot available unless listed.123456Figure 10-3. Panel, Rear w/Components

OM-244 324 Page 36Figure 10-4. Base Assembly. Hardware is common andnot available unless listed.123Figure 10-4. Base Assembly(Figure 10-1 Item 5)Quant

OM-244 324 Page 37Notes

NotesWork like a Pro!Pros weld and cutsafely. Read thesafety rules atthe beginningof this manual.

Notes

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OM-244 324 Page 1SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USINGsom 2011−107Protect yourself and others from injury — read, follow, and save these

OM-244 324 Page 2Welding produces fumes and gases. Breathingthese fumes and gases can be hazardous to yourhealth.FUMES AND GASES can be hazardous.D Ke

OM-244 324 Page 31-3. Additional Symbols For Installation, Operation, And MaintenanceFIRE OR EXPLOSION hazard.D Do not install or place unit on, over,

OM-244 324 Page 41-4. California Proposition 65 WarningsWelding or cutting equipment produces fumes or gaseswhich contain chemicals known to the State

OM-244 324 Page 5SECTION 2 − DEFINITIONS2-1. Additional Safety Symbols And DefinitionsWarning! Watch Out! There are possible hazards as shown by the s