Miller XMT 450 CC/CV User Manual

Page 2 - To locate your nearest; Thank you; From Miller to You

Miller Electric manufactures a full lineof welders and welding-related equipment.For information on other quality Millerproducts, contact your local Miller distributor to receive the latest fullline catalog or individual specification sheets. To locate your nearest distributor or service agency call...

Page 3 - TABLE OF CONTENTS

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

Page 5 - ELECTRIC SHOCK can kill.

OM-251387 Page 1 SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som 2020 − 02 7 Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if not avoided, will ...

Page 6 - FUMES AND GASES can be hazardous.; ARC RAYS can burn eyes and skin.; WELDING can cause fire or explosion.; BUILDUP OF GAS can injure or kill.

OM-251387 Page 2 Welding produces fumes and gases. Breathing these fumes and gases can be hazardous to your health. FUMES AND GASES can be hazardous. D Keep your head out of the fumes. Do not breathe the fumes. D Ventilate the work area and/or use local forced ventilation at the arc to remove weldin...

Page 7 - BATTERY EXPLOSION can injure.

OM-251387 Page 3 Compressed gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Since gas cylinders are normally part of the welding process, be sure to treat them carefully. CYLINDERS can explode if damaged. D Protect compressed gas cylinders from excessive heat, mech...

Page 9 - SECTION 2; CONSIGNES DE SÉCURITÉ; UNE DÉCHARGE ÉLECTRIQUE peut

OM-251387 Page 5 SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION som_2020 − 02_fre 7 Pour écarter les risques de blessure pour vous − même et pour autrui — lire, appliquer et ranger en lieu sûr ces consignes relatives aux précautions de sécurité et au mode opératoire. 2-1. Symboles utilis...

Page 12 - -4. Proposition californienne 65 Avertissements

OM-251387 Page 8 LIRE LES INSTRUCTIONS. D Lire et appliquer les instructions sur les étiquettes et le Mode d’emploi avant l’instal- lation, l’utilisation ou l’entretien de l’appareil. Lire les informations de sécurité au début du manuel et dans chaque section. D N’utiliser que les pièces de rechange...

Page 13 - -1. Additional Safety Symbols And Definitions; Notes

OM-251387 Page 9 SECTION 3 − DEFINITIONS 3-1. Additional Safety Symbols And Definitions . Some symbols are found only on CE products. Warning! Watch Out! There are possible hazards as shown by the symbols. Safe1 2012 − 05 When power is applied failed parts can explode or cause other parts to explode...

Page 14 - -2. Miscellaneous Symbols And Definitions; IP

OM-251387 Page 10 3-2. Miscellaneous Symbols And Definitions A Amperage Alternating Current (AC) V Voltage On Voltage Input Protective Earth (Ground) Line Connection Three Phase Static Frequency Convert- er-Transformer- Rectifier X Duty Cycle % Percent Three Phase Remote Gas Output Foot Control Gas ...

Page 15 - taminants pulled through the machine.; -3. Serial Number And Rating Label Location; -5. Information About Default Weld Parameters And Settings

OM-251387 Page 11 SECTION 4 − SPECIFICATIONS 4-1. Features And Benefits LVC t Line Voltage Compensation is circuitry that keeps the power source output constant regardless of input pow- er fluctuation. Wind Tunnel Technology t circulates air over components that require cooling, not over electronic ...

Page 16 - B. Temperature Specifications

OM-251387 Page 12 4-7. Dimensions and Weight Hole Layout Dimensions C D A G 14.5 in. (368 mm) 26.8 in. (681 mm) 17.2 in. (437 mm) B 252018-C F E A 8-11/16 in. (221 mm) B 11-3/8 in. (289 mm) C 15-3/4 in. (400 mm) D 22-7/16 in. (570 mm) E 2-3/4 in. (70 mm) F 3-3/8 in. (86 mm) Dia. G 1/4-20 UNC 2B Thre...

Page 18 - CC Mode; VOL; CV MODE; AMPERAGE

OM-251387 Page 14 4-10. Volt-Ampere Curves Volt-ampere curves show minimum and maximum voltage and amper- age output capabilities of welding power source. Curves of other set- tings fall between curves shown. AMPERAGE VOL TAGE CC Mode VOL TAGE CV MODE AMPERAGE 0 20 40 60 80 100 0 100 200 300 400 500...

Page 24 - -8. Optional Gas Valve Operation And Shielding Gas Connection; GAS IN

OM-251387 Page 20 5-8. Optional Gas Valve Operation And Shielding Gas Connection Ref. 252021-B Obtain gas cylinder and chain to running gear, wall, or other station- ary support so cylinder cannot fall and break off valve.1 Cylinder 2 Regulator/Flowmeter Install so face is vertical.3 Gas Hose Connec...

Page 27 - Pros weld and cut

OM-251387 Page 23 ! Turn Off welding power source, and check voltage on input capacitors according to Section 10-3 before proceeding. ! Installation must meet all National and Local Codes − have only qualified persons make this installation. ! Disconnect and lockout/tagout input power before connect...

Page 34 - SECTION 8

OM-251387 Page 30 SECTION 8 − GMAW/FCAW OPERATION 8-1. Typical Connection For Remote Control Feeder GMAW/FCAW Process 252921-C ! Turn off power before making connections. 1 Remote 14-Receptacle 2 Positive (+) Weld Output Terminal 3 Negative ( − ) Weld Output Terminal 4 Ground Cable to Workpiece 5 Wo...

Page 40 - SECTION 9

OM-251387 Page 36 SECTION 9 − SMAW/CAC-A OPERATION 6 3 4 2 1 9-1. Typical Connection For SMAW And CAC-A Process 252926-C ! Turn off power before making con- nections. 1 Electrode Holder (Carbon Arc) For CAC-A process connect carbon arc cutting torch to to positive weld output ter- minal.2 Electrode ...

Page 43 - Optional Low Open Circuit Voltage (OCV) Welding Modes

OM-251387 Page 39 9-4. Optional Low Open Circuit Voltage (OCV) Welding Modes Low OCV Operation The unit can be optionally configured for low open circuit voltage (OCV) operation in Stick and Scratch Start TIG modes. When the unit is config- ured for low OCV operation only a low sensing voltage (appr...

Page 44 - MAINTENANCE & TROUBLESHOOTING

OM-251387 Page 40 SECTION 10 − MAINTENANCE & TROUBLESHOOTING 10-1. Routine Maintenance . Maintain more oftenduring severe conditions. ! Disconnect power before maintaining. n = Check Z = Change ~ = Clean Δ = Repair l = Replace * To be done by Factory Authorized Service Agent Every 3 Months nl La...

Page 48 - ELECTRICAL DIAGRAM

OM-251387 Page 44 SECTION 11 − ELECTRICAL DIAGRAM Figure 11-1. Circuit Diagram

Page 50 - PARTS LIST

OM-251387 Page 46 SECTION 12 − PARTS LIST . Hardware is common andnot available unless listed. 2 10 9 8 7 6 5 4 3 1 12 20 19 18 17 16 15 14 13 11 22 30 29 28 27 26 25 24 23 21 40 39 38 37 36 35 34 33 32 31 47 46 45 44 43 42 41 Figure 12-1. Parts Assembly

Page 55 - (Equipment with a serial number preface of NA or newer); Call

Effective January 1, 2020 (Equipment with a serial number preface of NA or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other guarantees or warranties expressed or implied. LIMITED WARRANTY − Subject to the terms and conditions below, Miller Electri...

Page 56 - Miller Electric Mfg. LLC; Please complete and retain with your personal records.; Contact a DISTRIBUTOR or SERVICE AGENCY near you.; For Service; Register your product at

ORIGINAL INSTRUCTIONS − PRINTED IN USA © 2020 Miller Electric Mfg. LLC 2020 − 01 Miller Electric Mfg. LLC An Illinois Tool Works Company 1635 West Spencer Street Appleton, WI 54914 USA International Headquarters − USA USA Phone: 920-735-4505 Auto-Attended USA & Canada FAX: 920-735-4134 Internati...