Miller Electric STR 450 Owner's Manual
  1. Manuals
  2. Brands
  3. Miller Electric Manuals
  4. Welding System
  5. STR 450
  6. Owner's manual
Miller Electric STR 450 Owner's Manual

Miller Electric STR 450 Owner's Manual

Arc welding power source
Hide thumbs
Table of Contents

Advertisement

Quick Links

OM-236 031D
2011−01
Processes
Stick (SMAW) Welding
TIG (GTAW) Welding
Description
Arc Welding Power Source
STR 450
CE
www.MillerWelds.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the STR 450 and is the answer not in the manual?

Questions and answers

Related Manuals for Miller Electric STR 450

Summary of Contents for Miller Electric STR 450

  • Page 1 OM-236 031D 2011−01 Processes Stick (SMAW) Welding TIG (GTAW) Welding Description Arc Welding Power Source STR 450 www.MillerWelds.com...
  • Page 2 Warranty and service information for your particular model are also provided. Miller Electric manufactures a full line of welders and welding related equipment. For information on other quality Miller products, contact your local Miller...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING ........1-1.
  • Page 4 ITW Welding Products Italy S.r.l Via Privata Iseo 6/E, 20098 San Giuliano M.se, (MI) Italy declares that the product(s) identified in this declaration conform to the essential requirements and provisions of the stated Council Directive(s) and Standard(s). Product/Apparatus Identification: Product Stock Number STR 450, 230/400VAC 029016239 Council Directives: 2006/95/EC Low Voltage 2004/108/EC Electromagnetic Compatibility Standards: IEC 60974­1 Arc Welding Equipment ­...

  • Page 5: Section 1 − Safety Precautions - Read Before Using

    SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som _2010−03 Protect yourself and others from injury — read and follow these precautions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if Indicates special instructions. not avoided, will result in death or serious injury. The possible hazards are shown in the adjoining symbols or explained in the text.
  • Page 6 D Keep your head out of the fumes. Do not breathe the fumes. D Wear oil-free protective garments such as leather gloves, heavy shirt, cuffless trousers, high shoes, and a cap. D If inside, ventilate the area and/or use local forced ventilation at the arc to remove welding fumes and gases.

  • Page 7: Additional Symbols For Installation, Operation, And Maintenance

    1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can injure. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables.

  • Page 8: California Proposition 65 Warnings

    1-4. California Proposition 65 Warnings For Gasoline Engines: Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to Engine exhaust contains chemicals known to the State of cause birth defects and, in some cases, cancer. (California California to cause cancer, birth defects, or other reproduc- Health &...

  • Page 9: Section 2 − Definitions

    SECTION 2 − DEFINITIONS 2-1. Warning Label Definitions (For Wordless Labels) Warning! Watch Out! There are possible hazards as shown by the symbols. Electric shock from welding electrode or wiring can kill. 1.1 Wear dry insulating gloves. Do not touch electrode with bare hand.

  • Page 10: Weee Label (For Products Sold Within The Eu)

    Warning! Watch Out! There are possible hazards as shown by the symbols. Electric shock from wiring can kill. Disconnect input plug or power before working on machine. Read the Owner’s Manual before working on this machine. Consult rating label for input power requirements, and check power available at the job site −...

  • Page 11: Symbols And Definitions

    2-3. Symbols And Definitions Negative Weld Positive Weld Protective Earth Amperes Output Terminal Output Terminal (Ground) Supplementary Output Protector Shielded Metal Arc Volts Input Remote Welding (SMAW) Constant Current Rated Supply Rated Welding Duty Cycle (CC) Current Current Rated No-Load Rated Supply Load voltage Line Connection...

  • Page 12: Section 3 − Installation

    SECTION 3 − INSTALLATION 3-1. Important Information Regarding CE Products (Sold Within The EU) This equipment shall not be used by the general public as the EMF limits for the general public might be exceeded during welding. This equipment is built in accordance with EN 60974−1 and is intended to be used only in an occupational environment (where the general public access is prohibited or regulated in such a way as to be similar to occupational use) by an expert or an instructed person.

  • Page 13: Duty Cycle And Overheating

    3-4. Duty Cycle and Overheating Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating. If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle before welding.

  • Page 14: Volt-Ampere Curves

    3-5. Volt-Ampere Curves The volt-ampere curves show the normal minimum and maximum voltage and amperage output capa- bilities of the unit. DC Amperes 3-6. Selecting A Location Lifting Eye Lifting Forks Use lifting eye or lifting forks to move unit. Movement If using lifting forks, extend forks beyond opposite side of unit.

  • Page 15: Tipping

    3-7. Tipping Do not move or operate unit where it could tip. 956142737_5−5_B 3-8. Weld Output Terminals and Selecting Cable Sizes NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source is 30 m (100 ft) from the workpiece, the total cable length in the weld circuit is 60 m (2 cables x 30 m).

  • Page 16: Remote Receptacle Information

    3-9. Remote Receptacle Information This unit automatically uses the remote control if connected to the remote receptacle. Socket* Socket Information REMOTE Contact closure to B completes 24 volts AC con- tactor control circuit. Contact closure to A completes 24 volts AC con- tactor control circuit.

  • Page 17: Typical Connections For Stick (Smaw) Welding

    3-10. Typical Connections For Stick (SMAW) Welding 956142737_1-5_C / Ref. 803 310 3-11. Typical Connections For TIG (GTAW) Welding Remote output is always On in TIG mode. See Section 4-3 for scratch start TIG information. Hot Start function (for Stick weld- ing) is disabled in TIG mode.

  • Page 18: Positioning Jumper Links

    3-12. Positioning Jumper Links Disconnect and lockout/tag- out input power before installing or moving jumper links. Check input voltage available at site. Jumper Links Access Remove side panel. Jumper Link Label Check label − only one is on unit. Input Voltage Jumper Links Move jumper links to match input voltage.

  • Page 19: Connecting Input Power

    3-14. Connecting Input Power Installation must meet all Na- tional and Local Codes − have only qualified persons make this installation. Disconnect and lockout/tag- out input power before con- necting input conductors from unit. Always connect green or green/yellow conductor to supply grounding terminal GND/PE first, and never to a line ter-...

  • Page 20: Section 4 − Operation

    SECTION 4 − OPERATION 4-1. Controls Negative (−) Weld Terminal Power On-Off Switch Stick (SMAW) Welding Indicator Light Process Selection Switch Remote output is always On in TIG mode. Hot Start function (for Stick welding) is disabled in TIG mode. (GTAW) Welding Indicator Light...

  • Page 21: Stick Start Procedure − Scratch Start Technique

    4-2. Stick Start Procedure − Scratch Start Technique With Stick selected, start arc as follows: Electrode Workpiece Drag electrode across workpiece like striking a match; lift electrode slightly after touching work. If arc goes out electrode was lifted to high. If electrode sticks to workpiece, use a quick twist to free it.

  • Page 22: Section 5 − Maintenance And Troubleshooting

    SECTION 5 − MAINTENANCE AND TROUBLESHOOTING 5-1. Routine Maintenance Disconnect power before maintaining. n = Check Z = Change ~ = Clean l = Replace * To be done by Factory Authorized Service Agent Every Months l Damaged Or l Cracked Weld cables ~n Weld Connections Unreadable Labels Every...
  • Page 23 Trouble Remedy Erratic arc with excessive spatter. Use dry, properly stored electrodes. Shorten arc length. Reduce amperage setting. Electrode freezing to work. Increase amperage setting. Increase arc length. Use dry, properly stored electrodes. Low weld output with no control. Check position of Amperage Control (see Section 4-1). Limited output and low open-circuit Check incoming power for correct voltage.

  • Page 24: Section 6 − Electrical Diagrams

    SECTION 6 − ELECTRICAL DIAGRAMS Figure 6-1. Circuit Diagram For STR 450 OM-236 031 Page 20...
  • Page 25 956142738-A OM-236 031 Page 21...

  • Page 26: Section 7 − Parts List

    SECTION 7 − PARTS LIST Hardware is common and not available unless listed. 956142737_2-5_C Figure 7-1. Case And Running Gear Dia. Item Part Mkgs. Description Quantity Figure 7-1. Case And Running Gear ....+156122085 .
  • Page 27 Hardware is common and not available unless listed. 11-Figure 7-3 956142737_3-5_C Figure 7-2. Main Assembly Item Dia. Part Description Quantity Mkgs. Figure 7-2. Main Assembly ....656089037 .
  • Page 28 ....356029223 . . . Nameplate, Lower, STR 450/450 C ......
  • Page 29 Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
  • Page 30 Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
  • Page 31 Effective January 1, 2011 (Equipment with a serial number preface of MB 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 90 Days —...
  • Page 32 File a claim for loss or damage during Phone: 39 (0) 2982901 Fax: 39 (0) 298290-203 shipment. email: miller@itw−welding.it For assistance in filing or settling claims, contact your distributor and/or equipment manufacturer’s Transportation Department. ORIGINAL INSTRUCTIONS − PRINTED IN USA 2011 Miller Electric Mfg. Co. 2011−01...

Table of Contents