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IM998
August, 2009
INVERTER ARC ™ 120
For use with machines having Code Numbers: 11565
Safety Depends on You
Century® arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thought-
ful operation on your part. DO
NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOUT. And, most
importantly, think before you act
and be careful.
OPERA
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i i SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains are known to the State of California to cause can- chemicals known to the State of California to cause cer, birth defects, and other reproductive harm. cancer, birth defects, or other reproductive harm. The Above For Diesel Engines The Above For Gasoline Engines ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY
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ii ii SAFETY ARC RAYS can burn. ELECTRIC SHOCK can 4.a. Use a shield with the proper filter and cover kill. plates to protect your eyes from sparks and 3.a. The electrode and work (or ground) circuits the rays of the arc when welding or observing are electrically “hot” when the welder is on. open arc welding. Headshield and filter lens Do not touch these “hot” parts with your bare should conform to ANSI Z87. I standards. skin or wet clothing. Wear dry, hole-free gloves to insulate hands. 4.b. Us
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iii iii SAFETY WELDING and CUTTING CYLINDER may explode SPARKS can if damaged. cause fire or explosion. 7.a. Use only compressed gas cylinders 6.a. Remove fire hazards from the welding area. containing the correct shielding gas for the If this is not possible, cover them to prevent process used and properly operating the welding sparks from starting a fire. regulators designed for the gas and Remember that welding sparks and hot pressure used. All hoses, fittings, etc. should be suitable for mat
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iv iv SAFETY PRÉCAUTIONS DE SÛRETÉ 6. Eloigner les matériaux inflammables ou les recouvrir afin de prévenir tout risque d’incendie dû aux étincelles. Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce 7. Quand on ne soude pas, poser la pince à une endroit isolé de manuel aussi bien que les précautions de sûreté générales suiv- la masse. Un court-circuit accidental peut provoquer un antes: échauffement et un risqu
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v v SAFETY Electromagnetic Compatibility (EMC) Conformance Products displaying the CE mark are in conformity with European Community Council Directive of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility (89/336/EEC). It was manufactured in conformity with a national standard that implements a harmonized standard: EN 60974-10 Electromagnetic Compatibility (EMC) Product Standard for Arc Welding Equipment. It is for use with other Lincoln El
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vi vi SAFETY Electromagnetic Compatibility (EMC) The size of the surrounding area to be considered will depend on the structure of the building and other activities that are taking place. The surrounding area may extend beyond the boundaries of the premises. Methods of Reducing Emissions Mains Supply Welding equipment should be connected to the mains supply according to the manufacturer’s recommenda- tions. If interference occurs, it may be necessary to take additional precautions such as filter
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vii vii for selecting one of our QUALITY products. We want you to take pride in operating this product ••• as much pride as we have in T Th ha an nk k Y Yo ou u bringing this product to you! CUSTOMER ASSISTANCE POLICY The business of our company is manufacturing and selling high quality welding equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask us for advice or information about their use of our products. We respond t
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viii viii TABLE OF CONTENTS Page Installation.......................................................................................................................Section A Technical Specifications .......................................................................................................A-1 Safety Precautions .................................................................................................A-2 Select Suitable Location................................................
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A-1 A-1 INSTALLATION TECHNICAL SPECIFICATION INVERTER ARC™ 120 INPUT - SINGLE PHASE ONLY Input Voltages 60 Hz. Rated Input Current 120Vac ± 15% 20 Amps @ Rated Output RATED OUTPUT Output Amps Output Volts Input Circuit Duty Cycle 70A (Stick) 22.8 Vdc 120 Vac 20% OUTPUT Output Current Range Maximum Open Circuit Voltage Type of Output 10-90 Amps 72 Volts Max. DC RECOMMENDED INPUT WIRE AND FUSE SIZES FOR MAXIMUM RATED OUTPUT TYPE SJT OR HARD USAGE INPUT MAXIMUM TIME-DELAY CIRCUIT INPUT VOLT
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A-2 A-2 INSTALLATION Read entire installation section before starting TILTING installation. Place the machine directly on a secure, level surface. Do not place or operate this machine on a surface SAFETY PRECAUTIONS with an incline greater than 15° from horizontal. The machine may topple over if this procedure is not fol- WARNING lowed. ELECTRIC SHOCK can kill. INPUT CONNECTIONS • Only qualified personnel should per- GROUND CONNECTION form this installation. The frame of the welder must be gr
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A-3 A-3 INSTALLATION 120V INPUT FIGURE A.1 The INVERTER ARC™ 120 is provided with a 120V cable, 6.0ft.(1.8m) in length, with a 15Amp 5-15P plug molded onto the cord. The rated output of the INVERTER ARC™ 120 is Electrode available when connected to a 20A branch circuit. Holder When connected to a branch circuit with lower ampac- ity, lower welding current and duty cycle must be used. An output guide is provided below. The values are approximate and must be adjusted downward if the fuse or cir
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B-1 B-1 OPERATION Read and understand this entire section before WELDING CAPABILITY operating your machine. The INVERTER ARC™ 120 is rated at 70 amps, 22.8 SAFETY INSTRUCTIONS volts, at 20% duty cycle on a ten minute basis. It is capable of higher duty cycles at lower output currents. WARNING If the duty cycle is exceeded, a thermal protector will shut off the output until the machine cools. See Table ELECTRIC SHOCK can kill. A.1 in the INSTALLATION Section for other rated out- puts. • Do not to
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B-2 B-2 OPERATION REAR CONTROL PANEL CONTROLS AND OPERATIONAL (See Figure B.2) FEATURES 6. Power Switch: It turns ON / OFF the input power FRONT CONTROL PANEL to the machine. (See Figure B.1) A 1. Output Current Knob: Potentiometer used to 7. Input cable: This machine is provided with a set the output current used during welding. Set the plugged input cord. Connect it to the mains. output according to the type and size of electrode. 8. Fan 2. Power LED: After the Power Switch is turned on
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B-3 B-3 OPERATION This figure closely resembles what is actually seen ARC-WELDING CIRCUIT during welding. The “arc stream’’ is seen in the middle (See Figure B.3) of the figure. This is the electric arc created by the electric current flowing through the space between the FIGURE B.3 end of the electrode and the work. The temperature of this arc is about 6000°F (3315°C), which is more than enough to melt metal. The arc is very bright, as well as hot, and cannot be looked at with the naked eye wit
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B-4 B-4 OPERATION 4. Immediately after striking the arc try to maintain a 7. Once the electrode is burned down move the elec- distance from the workpiece that is equivalent to trode quickly from the weld to extinguish the arc. the diameter of the electrode used. Maintain this distance as constantly as possible during the weld. 8. Turn the machine off and remove the stub by open- Whenever possible, weld from left to right (if right- ing the jaws of the electrode holder and insert a handed). Hold
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D-1 D-1 MAINTENANCE SAFETY PRECAUTIONS WARNING WARNING Do not open this machine and do not introduce any- thing into its openings. Power supply must be discon- ELECTRIC SHOCK can kill. nected from the machine before each maintenance • Have an electrician install and serv- and service. After each repair, perform proper tests to ice this equipment. ensure safety. • Turn the input power off at the fuse box, disconnect supply lines and CAUTION allow machine to sit for five minutes minimum to allow
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E-1 E-1 TROUBLESHOOTING HOW TO USE TROUBLESHOOTING GUIDE WARNING Service and Repair should only be performed by Factory Trained Personnel. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, please observe all safety notes and precautions detailed throughout this manual. __________________________________________________________________________ This
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E-2 E-2 TROUBLESHOOTING Observe all Safety Guidelines detailed throughout this manual PROBLEMS POSSIBLE RECOMMENDED (SYMPTOMS) CAUSE COURSE OF ACTION WELDING PROBLEMS Excessive spatter 1. Improper welding polarity. 1. Make sure the electrode holder is plugged into the positive “+” out- put terminal. 2. Long Arc Length. 2. Move the electrode closer into the weld joint. 3. High Current. 3. Turn the output knob down. Craters 1. Fast movement of the electrode 1. Maintain a steady consistent arc away
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E-3 E-3 TROUBLESHOOTING Observe all Safety Guidelines detailed throughout this manual PROBLEMS POSSIBLE RECOMMENDED (SYMPTOMS) CAUSE COURSE OF ACTION ELECTRICAL FAILURES Machine fails to come on 1. No Input Voltage. (Power LED off) 2. Faulty supply plug or cable. 3. Supply fuse blown or breaker tripped. Thermal overload 1. Unit has been operated beyond its (Thermal LED on) capacity rating. 2. Airflow through machine is restrict- ed or fan has failed. The fan works, but the output current 1. Che
