Miller Electric CST 250 Owner'S Manual Download Page 33 | Manualshive

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OM-2237 Page 29

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Summary of Contents for CST 250

Page 1: ...Visit our website at www MillerWelds com Processes Description Stick SMAW Welding OM 2237 206 035H July 2005 Arc Welding Power Source CST 250 TIG GTAW Welding...

Page 2: ...ue the tradition They re just as committed to providing equipment and service that meets the high standards of quality and value established in 1929 This Owner s Manual is designed to help you get the...

Page 3: ...s 13 3 7 TIG Lift Arct DCEN Direct Current Electrode Negative Connections 14 3 8 Stick DCEP Direct Current Electrode Positive Connections 15 3 9 Electrical Service Guide 15 3 10 Selecting 230 Volts AC...

Page 4: ......

Page 5: ...box or that cord plug is connected to a properly grounded receptacle outlet When making input connections attach proper grounding conduc tor first double check connections Frequently inspect input pow...

Page 6: ...off welding wire at contact tip when not in use Wear oil free protective garments such as leather gloves heavy shirt cuffless trousers high shoes and a cap Remove any combustibles such as a butane li...

Page 7: ...alified electrician prompt ly correct any interference problem resulting from the installa tion If notified by the FCC about interference stop using the equipmentat once Have the installation regularl...

Page 8: ...e 617 770 3000 website www nfpa org and www sparky org OSHA Occupational Safety and Health Standards for General Indus try Title 29 Code of Federal Regulations CFR Part 1910 Subpart Q and Part 1926 Su...

Page 9: ...cordon d alimentation est bien raccord la borne de terre du sectionneur ou que la fiche du cordon est raccord e une prise correctement mise la terre Pour ex cuter les branchements d entr e fixer d ab...

Page 10: ...els que des gants en cuir une chemise en tissu pais des pantalons sans revers des chaussures montantes et un masque Avant de souder retirer tout produit combustible de ses poches tel qu un briquet au...

Page 11: ...t dispositifs de protection LE RAYONNEMENT HAUTE FR QUENCE H F risque de causer des interf rences Le rayonnement haute fr quence peut causer des interf rences avec les quipements de radio navigation e...

Page 12: ...andards for General Indus try Title 29 Code of Federal Regulations CFR Part 1910 Subpart Q and Part 1926 Subpart J de l U S Government Printing Office Super intendent of Documents P O Box 371954 Pitts...

Page 13: ...y Cycle 5 200 A 65 VDC 42 6 n a n a 9 8 6 5 W 7 1 2 in 191 mm D 18 in 457 mm 40 lb 18 2 kg 1 Phase 150 A 26 VDC 100 Duty Cycle 5 200 A 65 VDC 30 4 n a n a 6 9 4 4 3 2 Duty Cycle And Overheating Duty C...

Page 14: ...en curves shown xx10 Stick VA Curves xx18 Stick VA Curve 0 10 20 30 40 50 60 70 80 90 100 0 50 100 150 200 250 300 350 DC AMPS DC VOLTS 100A SOFT 100A STIFF 150A SOFT 150A STIFF 200A SOFT 200A STIFF 2...

Page 15: ...ves show minimum and maximum voltage and amperage output capabilities of welding power source Curves of other settings fall between curves shown TIG VA Curve 0 10 20 30 40 50 60 70 80 0 50 100 150 200...

Page 16: ...put power supply Special installation may be required where gasoline or volatile liquids are present see NEC Article 511 or CEC Section 20 Location And Airflow 1 18 in 460 mm 18 in 460 mm 803 080 18 i...

Page 17: ...0 95 3 0 95 200 3 30 2 35 1 50 1 0 60 2 0 70 3 0 95 4 0 120 4 0 120 250 2 35 1 50 1 0 60 2 0 70 3 0 95 4 0 120 2 ea 2 0 2x70 2 ea 2 0 2x70 Output Receptacles 300 1 50 1 0 60 2 0 70 3 0 95 4 0 120 2 ea...

Page 18: ...TIG torch to negative weld output terminal 3 Gas Cylinder 4 Cylinder Valve Open valve slightly so gas flow blows dirt from valve Close valve 5 Regulator Flowmeter 6 Flow Adjust Typical flow rate is 15...

Page 19: ...age is outside of this range no output is available NOTE 50 60 Hz Single Phase 50 Duty Cycle 50 60 Hz Three Phase 50 Duty Cycle Input Voltage 230 230 460 575 Input Amperes At Rated Output 43 31 15 12...

Page 20: ...crews from both sides also remove 2 screws from front and rear panels Do Not Remove Handle Slightly separate front and rear panels away from top cover Lift up one end of top cover then lift up other e...

Page 21: ...both sides also remove 2 screws from front and rear panels Do Not Remove Handle Slightly separate front and rear panels away from top cover Lift up one end of top cover then lift up other end and remo...

Page 22: ...ply grounding terminal never to a line terminal Connect black white and red wires L1 L2 L3 to line terminals For single phase operation Always connect green or green yellow wire to supply grounding te...

Page 23: ...shes several times and then illuminatescontinuously When unit is shut down the indicator light flashes several times and the cooling fan will run briefly then both will turn off completely 3 Process C...

Page 24: ...ovides a higher dig arc force that gives a slightly more fluid weld puddle more arc snap and reduces the potential for electrode sticking at shorter arc lengths Make connections according to Section 3...

Page 25: ...ectrode to workpiece at weld start point Hold electrode to workpiece for 1 2 seconds and slowly lift electrode Arc is formed when electrode is lifted Normal open circuit voltage is not present before...

Page 26: ...on the AMP ADJUST control setting A J B K I Socket Socket Information B K I C L N H D M G 15 VOLTS DC A 15 volts dc not functional D M G E F 15 VOLTS DC B Contact closure to A completes 15 volts dc c...

Page 27: ...Clean and tighten weld terminals Replace Damaged Gas Hose 3 Months Repair Or Replace Cracked Cables And Cords 6 Months Blow out inside During heavy service clean monthly Do not remove case when blowin...

Page 28: ...any external voltage sources No weld output Blue LED flashes 5 times repeatedly yellow LED off Short circuit across output studs Check and correct any short circuit conditions Low weld output Blue LE...

Page 29: ...Worn or defective tungsten Use properly prepared tungsten see Section 7 Shielding gas flow too high Reduce shielding gas flow rate see Section 3 7 Tungsten electrode oxidizing and not remaining brigh...

Page 30: ...OM 2237 Page 26 SECTION 6 ELECTRICAL DIAGRAMS Figure 6 1 Circuit Diagram 206 171 C...

Page 31: ...00 320 3 16 500 750 55 80 400 500 290 390 1 4 750 1000 80 125 600 800 340 525 Typical argon shielding gas flow rates are 15 to 35 cfh cubic feet per hour Not Recommended The figures listed are intende...

Page 32: ...ecome contami nated causing lower weld quality 3 Ideal Tungsten Preparation Stable Arc 2 1 2 Times Electrode Diameter 1 2 1 Stable Arc 2 Flat Diameter of this flat determines amperage capacity 3 Grind...

Page 33: ...OM 2237 Page 29 Notes...

Page 34: ...2237 Page 30 SECTION 8 PARTS LIST Hardware is common and not available unless listed 803 157 B 8 12 13 20 21 25 23 7 2 4 22 3 24 10 5 1 9 6 15 19 14 14 15 18 17 19 28 26 11 27 16 Figure 8 1 Main Assem...

Page 35: ...TLT 2400 UF 500 VDC CAN 2 5 DIA 2 21 205908 CLAMP CAPACITOR 2 500 DIA HORIZONTAL MTG NYLON 1 22 189777 RAIL HEAT SINK 2 134327 LABEL WARNING GENERAL PRECAUTIONARY STATIC WIRE FE 1 185835 LABEL WARNING...

Page 36: ...09473 RECEPTACLE TWIST LOCK TWECO FEMALE POWER 2 10 202553 RECEPTACLE TWIST LOCK DINSE FEMALE POWER 2 11 185712 INSULATOR BULKHEAD FRONT 2 2 12 185713 INSULATOR BULKHEAD REAR 2 2 13 185714 WASHER TOOT...

Page 37: ...NT REAR 1 2 206052 PANEL REAR UPPER 1 3 206053 PANEL REAR LOWER 1 4 210128 BRACKET HEATSINK 1 5 145217 SCREW K40X 12 PAN HD PHL 2 6 207253 BLANK HEX HOLE BLACK 1 7 201155 BUSHING STRAIN RELIEF 450 709...

Page 38: ...R W LEADS 1 7 C3 196143 CAPACITOR POLYP MET FILM 16 UF 400 VAC 10 1 8 057357 BUSHING SNAP IN NYL 937 ID X 1 125 MTG HOLE 3 9 109056 CORE FERRITE E 2 164 LG X 1 094 HIGH X 826 WIDE 1 10 L3 206273 COIL...

Page 39: ...R2 C6 196510 RESISTOR CAPACITOR 1 6 R1 C5 207384 RESISTOR CAPACITOR 1 7 RT1 209223 THERMISTOR NTC 30K OHM 25 DEG C 18IN LEAD 1 8 049611 TUBING COP 540 OD X 123 WALL X 687 1 9 207932 INSULATOR HEATSINK...

Page 40: ...ASSY 2 4 133528 RIVET AL 125 DIA X 188 250 GRIP BLK BLIND DOME 4 5 195666 SCREW 010 32X 62 HEXWHD 40D STL PLD SLFFMG TAP RW 2 6 601862 NUT 010 32 38HEX 13H STL PLD 2 7 602203 WASHER LOCK 193IDX0 334OD...

Page 41: ...Figure 8 7 Heat Sink Assembly Input 1 205915 HEAT SINK IGBT INPUT RECTIFIER MODULE 1 2 206091 BRACKET HEATSINK REAR 1 3 TE1 206328 BLOCK TERM 70 AMP 3 POLE SCREW TERM 4 14 WIRE 1 To maintain the facto...

Page 42: ...Notes...

Page 43: ...nd Blankets APT SAF Model Plasma Cutting Torches Remote Controls Accessory Kits Replacement Parts No labor Spoolmate Spoolguns Canvas Covers Miller s True Blue Limited Warranty shall not apply to 1 Co...

Page 44: ...retain with your personal records Always provide Model Name and Serial Style Number Contact a DISTRIBUTOR or SERVICE AGENCY near you Welding Supplies and Consumables Options and Accessories Personal S...

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