Page 2 - SAFETY; WARNING; CALIFORNIA PROPOSITION 65 WARNINGS; The Above For Diesel Engines
FOR ENGINEpowered equipment. 1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Operate engines in open, well-ventilated areas or vent the engine exhaust fumes outdoors....
Page 3 - ii; ELECTRIC SHOCK can kill.
ii SAFETY ii ARC RAYS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks andthe rays of the arc when welding or observingopen arc welding. Headshield and filter lensshould conform to ANSI Z87. I standards. 4.b. Use suitable clothing made from durable...
Page 4 - iii
FOR ELECTRICALLYpowered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working onthe equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer’srecommendations. 8.c. Ground the equipment in ac...
Page 5 - iv; PRÉCAUTIONS DE SÛRETÉ
iv SAFETY iv PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- antes: Sûreté Pour Soudage A L’Arc 1. Protegez-vous contre la seco...
Page 6 - Thank You; Please Examine Carton and Equipment For Damage Immediately
v v Thank You for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product •••as much pride as we have in bringing this product to you! Read this Operators Manual completely before attempting to use this equipment. Save this manual...
Page 7 - TABLE OF CONTENTS; Safety; Operation
TABLE OF CONTENTS vi vi SQUARE WAVE TIG 355 Page Safety .................................................................................................................................................i-iv Installation ....................................................................................
Page 8 - vii
TABLE OF CONTENTS vii vii SQUARE WAVE TIG 355 TIG Welding Sequence of Operation (4-Step Mode) .........................................................B-19 Overload Protection ..................................................................................................................B-20 Auxil...
Page 9 - INSTALLATION; TECHNICAL SPECIFICATIONS - SQUARE WAVE TIG 355; RATED OUTPUT; RECOMMENDED INPUT WIRE AND FUSE SIZES; PHYSICAL DIMENSIONS; OPERATING TEMPERATURE RANGE STORAGE TEMPERATURE RANGE
INSTALLATION A-1 A-1 SQUARE WAVE TIG 355 TECHNICAL SPECIFICATIONS - SQUARE WAVE TIG 355 INPUT - SINGLE PHASE ONLY Input Voltages: 208 230 460 575 Input Currents @ 350A/34 VDC 110 100 50 40 RATED OUTPUT Duty Cycle Amps Volts at Rated Amperes 40% Duty Cycle 350 34 v 60% Duty Cycle 300 32 v 100% Duty C...
Page 10 - SAFETY PRECAUTIONS; SELECT SUITABLE LOCATION; STACKING; CYLINDER MAY EXPLODE if damaged.; TILTING
Read this entire installation section before youstart installation. SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrodes with your skin or wetclothing. • Insulate yourself from the work and ground. • Always wear dry insulating gloves. Only qualified person...
Page 11 - INPUT CONNECTIONS; GROUND CONNECTION; FIGURE A.1 – REAR PANEL
3. Be sure the torch and work cable rubber coveringsare free of cuts and cracks that allow high fre-quency leakage. Cables with high natural rubbercontent, such as Lincoln Stable-Arc ® better resist high frequency leakage than neoprene and othersynthetic rubber insulated cables. 4. Keep the torch in...
Page 12 - FIGURE A.2 – INPUT SUPPLY CONNECTIONS; RECONNECT PROCEDURE
INSTALLATION A-4 A-4 SQUARE WAVE TIG 355 FIGURE A.2 – INPUT SUPPLY CONNECTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrodes with your skin or wetclothing. • Insulate yourself from the work and ground. • Always wear dry insulating gloves. RECONNECT PROCEDURE On multip...
Page 14 - OUTPUT CONNECTIONS; TIG TORCH CONNECTION; Lengths up to
OUTPUT CONNECTIONS ELECTRIC SHOCK can kill. • Keep the electrode holder, TIG torch and cables insulation ingood condition and in place. • Do not touch electrically live parts or electrode with skin or wetclothing. • Insulate yourself from work and ground. • Turn the power off pushbutton on the Squar...
Page 16 - OPERATION; OPERATING INSTRUCTIONS
OPERATION B-1 B-1 SQUARE WAVE TIG 355 OPERATING INSTRUCTIONS Read and understand this entire section of operatinginstructions before operating the machine. SAFETY INSTRUCTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrodes with your skin or wet cloth-ing. • Insulate yo...
Page 17 - GENERAL DESCRIPTION; RECOMMENDED PROCESSES; DESIGN FEATURES AND ADVANTAGES
GENERAL DESCRIPTION The Square Wave TIG 355 is a constant current, singlerange square wave AC/DC TIG (GTAW) arc weldingpower source with built-in high frequency stabilization.It also has stick (SMAW) capability. The Square WaveTIG 355 gives the operator full control of the weldingcurrent plus the ab...
Page 19 - CONTROLS AND SETTINGS; UPPER CASE FRONT CONTROLS; FIGURE B.1 – UPPER CASE FRONT CONTROLS
CONTROLS AND SETTINGS UPPER CASE FRONT CONTROLS Controls on the upper case front control panel areused for manual TIG and stick welding. Their func-tions are described below. Some controls are active inboth TIG and stick welding, while others are active inTIG only. Refer to Figure B.1 for control lo...
Page 20 - UPPER CASE FRONT CONTROL PANEL; CURRENT CONTROL SWITCH
UPPER CASE FRONT CONTROL PANEL The upper case front panel controls are used for man-ual TIG and stick welding. 1. CURRENT CONTROL SWITCH A two-position toggle switch: LOCAL (PANEL): Current is controlled by themachine settings; remote Amptrol has no affecton current. REMOTE: Current is controlled by...
Page 21 - LED; CAUTION
6. PEAK CURRENT CONTROL Presets the maximum welding current themachine will produce, from 2 through 400 amps.The preset current is displayed on the digitalammeter when you are not welding. NOTE: The ammeter display is an indicator of thepreset current. Actual welding current will beslightly differen...
Page 23 - FIGURE B.2 – STATUS INDICATOR LIGHT SEQUENCE
Example: The Peak Current control is preset at 50amps and the Amptrol is partially down, giving apeak current of 30 amps. If the BackgroundCurrent control is set at 50%, the Background (lowpulse) current will be 15 amps. The Amptrol raises and lowers the Peak current.Since Background current is alwa...
Page 25 - LOWER CASE FRONT CONTROLS; FIGURE B.3 – LOWER CASE FRONTCONTROLS
OPERATION B-10 B-10 SQUARE WAVE TIG 355 LOWER CASE FRONT CONTROLS Refer to Figure B.3 for the location of the following controls. FIGURE B.3 – LOWER CASE FRONTCONTROLS 4 5 3 2 1 9 8 7 6
Page 27 - HAND AND FOOT AMPTROL OPERATION
HAND AND FOOT AMPTROL OPERATION Both the Hand and Foot Amptrol (optional kits K870 orK963) work in a similar manner. They are meant to beused for remote current control when Remote Currentcontrol is selected. The TIG 2-Step mode must beselected when using an Amptrol for remote currentcontrol. As exp...
Page 28 - FIGURE B.5 – AMPTROLS USED WITH CURRENT CONTROL IN REMOTE POSITION
OPERATION B-13 B-13 SQUARE WAVE TIG 355 FIGURE B.4 – AMPTROLS USED WITH CURRENT CONTROL IN THE LOCAL POSITION FIGURE B.5 – AMPTROLS USED WITH CURRENT CONTROL IN REMOTE POSITION
Page 29 - WELDING OPERATION; STICK WELDING; TIG WELDING GUIDELINES; Stainless or Mild Steel Welding:
WELDING OPERATION INITIAL START-UP Be sure the Square Wave TIG 355 has been installedcorrectly with respect to location, high frequency pro-tection, input power, and output connections. If you are TIG welding, connect a K870 or K963Amptrol or a K814 Arc Start switch to the RemoteReceptacle. Check th...
Page 33 - TYPICAL CURRENT RANGES
OPERATION B-18 B-18 SQUARE WAVE TIG 355 TABLE B.2 TYPICAL CURRENT RANGES (1) FOR TUNGSTEN ELECTRODES (2) DCEN (-) DCEP (+) Tungsten 1%, 2% 1%, 2% Electrode 1%, 2% 1%, 2% Thoriated Thoriated TIG Torch Diameter Thoriated Thoriated Pure Tungsten Pure Tungsten Stainless Nozzle in. (mm) Tungsten Tungsten...
Page 35 - OVERLOAD PROTECTION; AUXILIARY POWER; ALL MACHINES
11. Hold the Arc Start switch down until an arc is established. At this point, the Arc Start Switchcan be released, and the weld will continue.Press and release the Arc Start switch a secondtime to stop the arc. When the Afterflow timercompletes the cycle, the gas and water valvesclose. To make anot...
Page 36 - ACCESSORIES
OPTIONS/ACCESSORIES The following options/accessories are available foryour Square Wave TIG 355 from your local LincolnElectric Distributor. Undercarriage (K841) – Includes a platform, wheels, and brackets for supporting the welder and two gascylinders. Pump Mounting Platform (K827) – Mounts on top ...
Page 37 - MAINTENANCE
MAINTENANCE D-1 D-1 SQUARE WAVE TIG 355 WARNING SAFETY PRECAUTIONS • Only Qualified personnel should perform this maintenance. • Turn the input power OFF at the disconnect switch or fuse boxbefore working on this equipment. • Do not touch electrically hot parts. INPUT POWER FACTORCAPACITOR DISCHARGE...
Page 38 - Maintain the gap marked on the; FIGURE D.1 – POWER FACTOR CAPACITOR DISCHARGE DETAILS
5. If any voltage is present, DISCHARGE EACH INDI- VIDUAL CAPACITOR as follows: a. Obtain a 500 Ohm resistor. Grip the 500 ohm resistor with insulated gloves and insulatedgripping pliers and hold the resistor across theterminals on each capacitor for 20 seconds.See Figure D.1. b. With the volt/ohmme...
Page 39 - FIGURE D.2 – GENERAL COMPONENT LOCATIONS
MAINTENANCE D-3 D-3 SQUARE WAVE TIG 355 FIGURE D.2 – GENERAL COMPONENT LOCATIONS 1. OUTPUT RECTIFIER/SCR BRIDGE ASSEMBLY2. INPUT CONTACTOR3. RECONNECT PANEL4. PILOT TRANSFORMER5. FAN AND FAN MOTOR6. INPUT POWER FACTOR CAPACITOR7. MAIN TRANSFORMER8. CHOKE9. HIGH VOLTAGE TRANSFORMER 10. PC BOARDS (POW...
Page 40 - TROUBLESHOOTING; TROUBLESHOOTING GUIDE; GENERAL MACHINE TROUBLE
E-1 E-1 SQUARE WAVE TIG 355 TROUBLESHOOTING TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed throughout this manual. GENERAL MACHINE TROUBLE SYMPTOM CAUSE AND REMEDY Machine will not turn on. 1. Input supply lines not “hot”. Check input supply line fuses. 2. Blown control circuit fuse (F1). ...
Page 42 - TIG WELDING
TROUBLESHOOTING E-3 E-3 SQUARE WAVE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed throughout this manual. TIG WELDING SYMPTOM CAUSE AND REMEDY Machine does not respond (no gas flow, no 1. Defective Arc Start Switch or Amptrol. Check for con- high frequency, no open circuit voltage...
Page 44 - LOWER PANEL CONTROLS
TROUBLESHOOTING E-5 E-5 SQUARE WAVE TIG 355 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed throughout this manual. SYMPTOM CAUSE AND REMEDY Tungsten is eroding quickly. 1. Current potentiometer is set too high for tungsten size.Reduce welding current or increase tungsten size. 2. In AC, Wa...
Page 46 - DIAGRAMS; WIRING DIAGRAM - Square W
DIAGRAMS SQUARE WAVE TIG 355 F-1 F-1 WIRING DIAGRAM - Square W ave TIG355 DUAL VOLTAGE MACHINE SINGLE VOLTAGE MACHINE MODE S10 LOCAL STICK CONTINUOUS REMOTE TIG OFF S11 S12 START TO GROUND PER NATIONAL ELECTRIC CODE 303 301 302 304 7-25-97C SQUARE WAVE TIG 355 WIRING DIAGRAM 2519 G 4 STEP 2 STEP S19...
Page 47 - DIMENSION PRINT - Square W
DIAGRAMS SQUARE WAVE TIG 355 F-2 F-2 DIMENSION PRINT - Square W ave TIG355 6-18-93C 17275 M S.W. TIG 355 K841 50.41 26.00 6.67 15.22 .74 24.12 .94 23.28 22.25 11.12 7.11 20.00 27.65 LOCATION OF .406 MOUNTING HOLES. * ** * 43.93 34.84 45.20 3.25 Ø
Page 48 - EQUIPMENT MANUFACTURER’S CERTIFICATION; The Lincoln Electric Company
EQUIPMENT MANUFACTURER’S CERTIFICATION Type of Equipment Model NumberCode NumberSerial Number Operating Instruction Manual Number The High Frequency Generator of the above identified equipment has been testedunder field test condition standards recommended by the Joint Industry Committee onHigh Freq...
Page 49 - Notes