Miller Electric 255

OM-157 066 Page 15

Ref. 200 062

Contents

Main Auto Arc 255 And M-25 Gun Page TABLE OF CONTENTS WARNING Page SECTION 1 SAFETY PRECAUTIONS - READ BEFORE USING 1-1. Symbol Usage . 1-2. Arc Welding Hazards ELECTRIC SHOCK can kill. ARC RAYS can burn eyes and skin. WELDING can cause fire or explosion. FLYING METAL can injure eyes. BUILDUP OF GAS can injure or kill. HOT PARTS can cause severe burns. 1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. FALLING UNIT can cause injury. OVERUSE can cause OVERHEATING STA TIC (ESD) can damage PC boards. 1-5. EMF Information SECTION 2 INSTALLATION 2-1. Specifications 2-2. Volt-Ampere Curve 2-3. Welding Power Source Duty Cycle And Overheating A or V CAUTION WELDING LONGER THAN RATED DUTY CYCLE can damage gun and void warranty. 2-5. Installing W ork Clamp 2-6. Installing Gas Supply 2-7. Installing W elding Gun 2-8. Installing Wire Spool And Adjusting Hub Tension 2-9. Setting Gun Polarity 2-10. Positioning Jumper Links 2-11. Electrical Service Guide 2-12. Selecting A Location And Connecting Input Power 2-13. Threading W elding Wire . SECTION 3 OPERATION 3-1. Front Panel Controls DO NOT SWITCH UNDER LOAD Page Page SECTION 4 MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance . 3 Months 6 Months 4-3. Fuses F1 And F2 4-4. Changing Drive Roll And Wire Inlet Guide 4-5. Replacing Gun Contact Tip 4-6. Cleaning Or Replacing Gun Liner 4-7. Replacing Switch And/Or Head Tube 4-8. Troubleshooting Welding Trouble Remedy Wire Drive/Gun Trouble Remedy Page Page SECTION 6 PARTS LIST Page Figure 6-2. Baffle, Center w/Components Page Page Page Page Page Figure 6-6. Exploded View Of Gun Page Page Page Warranty Effective January 1, 2000 (Equipment with a serial number preface of LA or newer) * Induction Heating Coils and Blankets Please complete and retain with your personal records. Resources Available Always provide Model Name and Serial/Style Number. Owners Record