Miller Electric STR 450 Owner's Manual

Arc Welding Power SourceXMT 450 CC/CVOM-257 220B2012−10ProcessesDescriptionMultiprocess WeldingFile: MULTIPROCESSVisit our website atwww.MillerWelds.

OM-257 220 Page 41-4. California Proposition 65 WarningsWelding or cutting equipment produces fumes or gaseswhich contain chemicals known to the State

OM-257 220 Page 5SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATIONfre_som_2011−107Pour écarter les risques de blessure pour vous−même et pour

OM-257 220 Page 6Il reste une TENSION DC NON NÉGLIGEABLE dansles sources de soudage onduleur UNE FOISl’alimentation coupée.D Arrêter les convertisseur

OM-257 220 Page 7LES ACCUMULATIONS DE GAZrisquent de provoquer des blessuresou même la mort.D Fermer l’alimentation du gaz comprimé en casde non utili

OM-257 220 Page 8Les PIÈCES MOBILES peuventcauser des blessures.D Ne pas s’approcher des organes mobiles.D Ne pas s’approcher des points de coincement

OM-257 220 Page 92-5. Principales normes de sécuritéSafety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1,is available as a free downl

OM-257 220 Page 10

OM-257 220 Page 11SECTION 3 − DEFINITIONS3-1. Additional Safety Symbols And Definitions. Some symbols are found only on CE products.Warning! Watch Out

OM-257 220 Page 12Do not weld on drums or any closed containers.Safe16 2012−05Do not remove or paint over (cover) the label.Safe20 2012−05Disconnect i

OM-257 220 Page 13Wear hat and safety glasses. Use ear protection and button shirtcollar. Use welding helmet with correct shade of filter. Wear comple

Miller Electric manufactures a full lineof welders and welding related equipment.For information on other quality Millerproducts, contact your local M

OM-257 220 Page 14SECTION 4 − INTRODUCTION4-1. SpecificationsInputPowerRated WeldingOutputAmperageRangeVoltageRangeMaximumOpen-CircuitVoltage DCAmpere

OM-257 220 Page 154-5. Duty Cycle and OverheatingDuty Cycle is percentage of 10 min-utes that unit can weld at rated loadwithout overheating.If unit o

OM-257 220 Page 164-6. Volt-Ampere CurvesVolt-ampere curves show minimumand maximum voltage and amper-age output capabilities of weldingpower source.

OM-257 220 Page 17SECTION 5 − INSTALLATION5-1. Important Information Regarding CE Products (Sold Within The EU)A. Information On Electromagnetic Field

OM-257 220 Page 185-4. Selecting a LocationRef. ST-151 556 / 800 611 / Ref. 250 026-B1 Lifting ForksUse lifting forks to move unit.Extend forks beyond

OM-257 220 Page 195-5. Weld Output Terminals And Selecting Cable Sizes*NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combin

OM-257 220 Page 205-6. Connecting Weld Output Cables803 778-B! Turn off power before connecting toweld output terminals.! Failure to properly connect

OM-257 220 Page 215-8. 115 Volts AC Duplex Receptacle And Supplementary ProtectorsRef. 257 348-A1 115 V 7 Amp AC Receptacle2 Supplementary Protector C

OM-257 220 Page 225-9. Optional Gas Valve Operation And Shielding Gas ConnectionRef. 252 021-A / 257 348-AObtain gas cylinder and chain torunning gear

OM-257 220 Page 235-10. Electrical Service GuideElec Serv 2011−08NOTICE − INCORRECT INPUT POWER can damage this welding power source. This welding pow

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

OM-257 220 Page 245-11. Connecting Input PowerTools Needed:5/16 in.3814971011L1L2L3= GND/PE Earth Ground1Input 2012−05 / Ref. 803 766-A / 257 348-A243

OM-257 220 Page 25! Turn Off welding power source, andcheck voltage on input capacitorsaccording to Section 10-3 beforeproceeding.! Installation must

OM-257 220 Page 26SECTION 6 − GENERAL OPERATION6-1. Front Panel. Weld process operation sections de-scribe functionality of the identified items.1 Rem

OM-257 220 Page 276-2. Mode Switch SettingsSwitch PositionProcess Output Control Panel Adjust Remote AdjustScratch Start TIG GTAW Electrode Hot Amps %

OM-257 220 Page 28SECTION 7 − GTAW OPERATION7-1. Typical Connection For GTAW ProcessRef. 252 920-A! Turn off power before mak-ing connections.1 Foot C

OM-257 220 Page 297-2. Scratch Start TIG Welding Mode - GTAW Process! Weld terminals are energized at alltimes in Scratch Start TIG weldingmode.1 Mode

OM-257 220 Page 307-3. Lift-Arc TIG Welding Mode - GTAW Process! Weld terminals are energizedthrough the remote control in TIGwelding mode.1 Mode Swit

OM-257 220 Page 317-4. Remote Scratch Start TIG Welding Mode - GTAW Process! Weld terminals are energizedthrough the remote control in TIGwelding mode

OM-257 220 Page 32SECTION 8 − GMAW/FCAW OPERATION8-1. Typical Connection For Remote Control Feeder GMAW/FCAW ProcessRef. 252 921-A! Turn off power bef

OM-257 220 Page 3325.08-2. MIG Welding Mode - GMAW/FCAW Process! Weld terminals are energizedthrough the remote control in MIGwelding mode.1 Mode Swit

TABLE OF CONTENTSSECTION 8 − GMAW/FCAW OPERATION 32...8-1. Typical Connection For Remote Control Fe

OM-257 220 Page 348-3. Typical Connection For Remote Control Feeder GMAW-P ProcessRef. 252 836-A! Turn off power before making connections.1 Optima -

OM-257 220 Page 35PP.P PPP8-4. Pulsed MIG Welding Mode - GMAW-P Process! Weld terminals are energizedthrough the remote control inPulsed MIG welding m

OM-257 220 Page 368-5. Typical Connection For Voltage-Sensing Feeder GMAW/FCAW ProcessRef. 252 924-A! Turn off power before mak-ing connections.1 Posi

OM-257 220 Page 3725.08-6. V-Sense Feeder Welding Mode - GMAW/FCAW Process! Weld terminals are energized at alltimes in V-Sense Feeder weldingmode.1 M

OM-257 220 Page 38SECTION 9 − SMAW/CAC-A OPERATION634219-1. Typical Connection For SMAW And CAC-A ProcessRef. 252 926-A! Turn off power before mak-ing

OM-257 220 Page 39859-2. Remote Stick Welding Mode - SMAW/CAC-A Process! Weld terminals are energizedthrough the remote control in Re-mote Stick weldi

OM-257 220 Page 4084.5 859-3. Stick Welding Mode - SMAW/CAC-A Process! Weld terminals are energized at alltimes in Stick welding mode.1 Mode Switch2 L

OM-257 220 Page 419-4. Optional Low Open Circuit Voltage (OCV) Welding ModesLow OCV OperationThe unit can be optionally config-ured for low open circu

OM-257 220 Page 42SECTION 10 − MAINTENANCE & TROUBLESHOOTING10-1. Routine Maintenance. Maintain more oftenduring severe conditions.! Disconnect po

OM-257 220 Page 4310-3. Removing Case and Measuring Input Capacitor Voltage In 400 VAC Models! Turn Off welding powersource, and disconnect in-put pow

DECLARATION OF CONFORMITYfor European Community (CE marked) products.MILLER Electric Mfg. Co., 1635 Spencer Street, Appleton, WI 54914 U.S.A. declar

OM-257 220 Page 4410-4. Help Displays. All directions are in reference to the frontof the unit. All circuitry referred to is lo-cated inside the unit.

OM-257 220 Page 4510-5. TroubleshootingTrouble RemedyNo weld output; unit completely inop-erative.Place line disconnect switch in On position (see Sec

OM-257 220 Page 46SECTION 11 − ELECTRICAL DIAGRAMFigure 11-1. Circuit Diagram

OM-257 220 Page 47256 909-A

OM-257 220 Page 48SECTION 12 − PARTS LIST. Hardware is common andnot available unless listed.125647929313330353840413242434546474881118121613151417192

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OM-257 220 Page 50Description QuantityPartNo.Dia.Mkgs.ItemNo.Figure 12-1. Parts Assembly1 255 082 Panel, Side Rh W/Nut Insert (Includes) 1... ...

OM-257 220 Page 51Description QuantityPartNo.Dia.Mkgs.ItemNo.Figure 12-1. Parts Assembly (Continued)PLG 3 130 203 Housing Plug+Pins (Service Kit) RC3

NotesOver 80,000 trainedsince 1930!400 Trade Square East, Troy, Ohio 453731-800-332-9448 www.welding.orgStart Your ProfessionalWelding Career Now!

Warranty Questions?Call1-800-4-A-MILLERfor your localMiller distributor.miller_warr 2012-01Your distributor also givesyou ...ServiceYou always get the

ORIGINAL INSTRUCTIONS − PRINTED IN USA © 2012 Miller Electric Mfg. Co. 2012−01Miller Electric Mfg. Co.An Illinois Tool Works Company1635 West Spencer

OM-257 220 Page 1SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USINGsom 2011−107Protect yourself and others from injury — read, follow, and save these

OM-257 220 Page 2Welding produces fumes and gases. Breathingthese fumes and gases can be hazardous to yourhealth.FUMES AND GASES can be hazardous.D Ke

OM-257 220 Page 31-3. Additional Symbols For Installation, Operation, And MaintenanceFIRE OR EXPLOSION hazard.D Do not install or place unit on, over,