Miller Electric STR 350C Owner`s manual
Contents
1. 16 SECTION 4 OPERATION orn ee n pueden anaes Ue a EE RR eR Eee e a Melee sas 17 4 1 Conttols i RE ne eA eee REA Pe RAR ES ARR CIR ERR Ra E P ERA 17 4 2 Welding Process Selection For STR 450 C 18 4 3 Welding Process Selection For STR 350 C 19 4 4 Hot Start And Arc Force DIG Controls All Models 20 4 5 Output Control Selector All Models 20 4 6 Amperage Control All Models 21 4 7 Stick Start Procedure Scratch Start Technique 21 4 8 Scratch Start TIG ese DI A Ae UP heave ened 22 4 9 l ift Arc Start Procedures eruere sre teer trt ele Eee p A ia Re 22 SECTION 5 MAINTENANCE AND TROUBLESHOOTING 23 5 4 Routine Maintenance siris 92 ener ceci E act eee ota UR AA ce Re e Tec n 23 5 2 Help Displays act eite erai npn ene t bea Fo b eI Manel eo Wee aes ae din 23 5 3 JTreubleshootilig s 15 o rr ERE REPRE a AMI REN RE MEC RIEN MA ton 23 SECTION 6 ELECTRICAL DIAGRAMS 000 cece eee eee nn nn nnn nnn 26 SECTION 7 PARTS LIST ee RI ee emcee2. 2 DD DT 156009127 Washer Round hooking For Handle 2 Suid a 056020071 Knob for hose 25 mm dia 2 vv VO e i oso 156002047 Handle rtu crt Racer Erreur ai 2 tcl es e e erre 156018114 Nut Locking M10 STR 850C 2 2d re aaa 156018125 Nut Locking hex M8STR450C 2 Lia uut eer 156009128 Washer flat 10x30 6 TR EAD RERUM 156012132 Handle Fixing Pin 2 ey VAS out 1561220806 Panel EH iso pom weg hina eu veis 1 Mr EE 156110001 FOO 2 lt 5 hebes eU e Lee etae n ble EPI 2 sa dO bas 156012133 Axle Wheels 25x605 mm 1 A VD Seti Pate tes CONS 000176254 Label General Precautionary 1 SAG eo eese 000207291 Label Warning Electric Shock Input 1 And 3Phase CE 1 When ordering a component originally displaying a precautionary label the label should also be ordered To maintain the factory original performance of your equipment use only Manufacturer s Suggested Replacement Parts Model and serial number required when ordering parts from your local distributor OM 249 914 Page 30 F Hardware is common and
3. R R Fa Fa Fa 4 LAVA o LO Fo 081 Y EN 32A JL L T T Fa Fa DON DORA 000000 t 20 283 JHP PC1 E MAIN BOARD ii N1 is BE z 836 Oo 0 A PC3 DIGITAL METER BOARD O N2 CONTROL BOX RD Tn SCR3 R1 5000 SCR2 SCR4 SCR5 PC1 SCRE MAIN BOARD J V2 JP21 REM CONNECTION REMOTE CONTROL Notes l ETES A o OQ ARC FORCE HOT START o CONTROL BOX 956142771 B OM 249 914 Page 27 amp WARNING e Do not touch live electrical parts 7 Disconnect input power or stop gt ia engine before servicing Do not operate with covers removed ELECTRIC Have only qualified persons install SHOCK HAZARD use or service this unit R S T ES ag S 3804 R S T F a 400V qe 3 51 N PON R R R Arcor ped Lu 4 fYY 2 1 _ 0 71 T M o s O s s
4. 3 0 2 ea 4 0 SSS 2x70 2x95 2x120 2x120 400 60 1 0 70 2 0 95 3 0 120 4 0 o ed 2 0 2 Bs 3 0 2 4 0 4 0 2x70 2x95 2x120 3x95 3x95 500 70 2 0 95 3 0 120 4 0 Done 2 0 2 ea 2 0 2 ea 3 0 2 ea 4 0 3 ea 3 0 3 ea 3 0 2x70 2x95 2x120 3x95 3x120 38120 600 95 3 0 120 4 0 2 ea 2 0 2 ea 3 0 2 ea 4 0 3 ea 3 0 3 ea 4 0 3 ea 4 0 For distances longer than those shown in this guide call a factory applications representative This chart is a general guideline and may not suit all applications If cable overheats use next size larger cable Weld cable size is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere Milan Ref S 0007 G 2009 08 OM 249 914 Page 12 3 9 Remote Receptacle Information a A O a E3 3 E ESL UU i x REMOTE Socket Socket Information A Contact closure to B completes 24 volts AC con tactor control circuit B Contact closure to A completes 24 volts AC con tactor control circuit REMOTE C Output to remote control 10 volts DC CONTROL D Remote control circuit common E 0 to 10 volts DC input command signal from re mote control The remaining sockets are not used When
5. IL II LLLI UL Negative Weld Terminal Power On Off Switch Welding Process Selection Control Contactor See Section 4 2 or 4 3 Welding Current Indicator Power On Pilot Light Weld Output Indicator Light High Temperature Indicator Arc Force DIG Control See Section 4 4 Hot Start Control See Section 4 4 Weld Current Control Output Control Selector See Section 4 5 Positive Weld Terminal Remote Control Receptacle See Section 3 9 OM 249 914 Page 17 4 2 Welding Process Selection For STR 450 C 1 AR A ES Welding Process Selection Control Contactor Use control to select weld process The weld process selected determ ines weld output on off control See Table below 3 4 5 A ee Plz 6 Weld output terminals are en ergized when welding precess selection control is in the TIG Lift Arc or Stick positions TIG Lift Arc This is a DCEN direct current electrode negative process in which the electrode must come in contact with work piece to initiate an arc see Section 4 9 Make connections according to Section 3 11 TIG Remote This is a GTAW process Make connections according to Section 3 11 CC Remote This is a DCEP direct current electrode positive p
6. Pa Lift Arc Start Method 377 e i 1 2 Touch Seconds Do NOT Strike Like A Match Lift Arc Start When Lift Arc button light is On start arc as follows 1 TIG Electrode 2 Workpiece Touch tungsten electrode to work piece at weld start point enable out put and shielding gas with torch trig ger foot control or hand control Hold electrode to workpiece for 1 2 seconds and slowly lift elec trode Arc is formed when electrode is lifted Normal open circuit voltage is not present before tungsten electrode touches workpiece only a low sensing voltage is present between electrode and workpiece The solid state output contactor does not energize until after electrode is touching workpiece This allows electrode to touch workpiece with out overheating sticking or getting contaminated Application Lift Arc is used for the DCEN or AC GTAW process when HF Start method is not permitted or to re place the scratch method OM 249 914 Page 22 SECTION 5 MAINTENANCE AND TROUBLESHOOTING 5 1 Routine Maintenance poi A Disconnect power before maintaining 2 Check Change Q Clean Replace To be done by Factory Authorized Service Agent Every WARNID 3 WARNIN Months E If x Damaged Or Unreadable Labels Cracked We
7. en ees Ree eee 30 WARRANTY 77 Miter DECLARATION OF CONFORMITY for European Community CE marked products 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 provi sions of the stated Council Directive s and Standard s Product Apparatus Identification Product Stock Number STR 350 C 380VAC 50HZ 029016245 STR 450 C 380VAC 50HZ 029016240 Council Directives e 2006 95 EC Low Voltage e 2004 108 EC Electromagnetic Compatibility Standards e IEC 60974 1 Arc Welding Equipment Welding Power Sources edition 3 2005 07 e IEC 60974 10 Arc Welding Equipment Electromagnetic Compatibility Requirements edition 2 0 2007 08 e EN 50445 2008 Product family standard to demonstrate compliance of equipment for resistance welding arc welding and allied processes with the basic restrictions related to human exposure to electromagnetic fields 0Hz 300Hz EU Signatory December 13th 2010 Massimigliano Lavarini Date of Declaration ELECTRONIC ENGINEER R amp D TECH SUPPORT 956 142 838 SECTION 1 SAFETY PRECAUTIONS READ BEFORE USING som 2010 03 A Protect yourself and others from injury read and follow these precautions 1 1 Symbol Usage DANGER Indicates a hazardous situation which if not avoided will result in death or serious i
8. 056067264 656089026 056067210 356029225 To maintain the factory original performance of your equipment use only Manufacturer s Suggested Model 350C 450C Description Figure 7 2 Main Assembly continued Probe Kit 600A oss rir ert daa aras Gee acs qeu Knob Pointer D 48 01 d Control Panel STR 450 C 1 Control Panel STR 350 C 1 Socket Dinse 50 Sq Mm 25 vnu Nameplate Lower STR 450 450 C 1 1 Connector kit 14 Pin Female 1 Front Panel PCB BOX 1 21 Resistor 500 Ohm D16 L90 hrs BASE uerius O MN Le ne Mn qu d as MES Fan 230 M 11000 iiia saec oet ee Y a e rds ar 1 1 AS 2 3 wes Hee Vanes hale le eames Uri y 1 Panel Rear uo A ia de Tons Cable Primary Input 4 X10 Mt 4 5 1 Cable Primary Input 4 X 6 Mt 4 1 Nameplate Rear 48V d Outlet 32 A aia e etie 1444 e toos ado aa e Re Ded ed To 4 Rubber Boot zn eR L an ree eR NT nac mur Aib 2 2 Cover receptacle duplex T oves rl Receptacle 115V Eee Breaker Circ
9. A Make input power connec tions to the welding power source first A Special installation may be required where gasoline or volatile liquids are present see NEC Article 511 or CEC Section 20 See rating label on unit and check input voltage available at site 1 Disconnect Device switch shown in OFF position 2 Disconnect Device Supply Grounding Terminal Connect green or green yellow grounding conductor to disconnect device grounding terminal first 3 Disconnect Device Line Terminals Connect input conductors L1 U L2 V And L3 W to disconnect device line terminals 4 Overcurrent Protection Select type and size of overcurrent protection using Section 3 12 fused disconnect switch shown Close and secure door on line dis connect device Remove lockout tagout device and place switch in the On position OM 249 914 Page 16 SECTION 4 OPERATION 4 1 Controls 25 e AM O 00008900q 00000000000000 S m Die sam c DE CC Welding Power Source SS SIE lt gt D 2 um SE lt gt gt lt p gt lt gt gt AE lt gt gt Sg lt gt gt lt gt lt gt SG gt SS gt lt 2 of 10 11 12
10. 3 000015 7 SECTION 3 INSTALLATION RI I a 8 3 1 Important Information Regarding CE Products Sold Within The EU 8 3 2 Serial Number And Rating Label Location 0 06 cece eect eens 8 3 3 Specifications enc ree f e Der DO WA RUD ER EN vare west ps 8 3 4 Duty Cycle and Overheating 9 3 5 Volt Ampere CUS so nee trt n E ee ente EAR P ERR e n ED qe 10 3 67 Selecting ALOCALION Ent re Eee iere a PO E a ne 11 957 TIPPING iere ertt redet ee dte ated re ecce ee te ud tendente ed 11 3 8 Weld Output Terminals and Selecting Cable Sizes 12 3 9 Remote Receptacle 001800 13 3 10 Typical Connections For Stick SMAW Welding 14 3 11 Typical Connections For TIG GTAW Welding 14 3 12 Electrical Service Guide 15 3 13 Connecting Input Power
11. Blower Unit No Labor Racks Running Gear and Trailers Subarc Wire Drive Assemblies Water Coolant Systems Hydramate 1 and 2 Water Coolant Systems USA Models Non Integrated Work Stations Weld Tables No Labor 5 6 Months Parts Batteries 6 90 Days Parts Accessory Kits Canvas Covers Induction Heating Coils and Blankets MIG Guns Remote Controls Replacement Parts No Labor Spoolmate Spoolguns Millers True Blue Limited Warranty shall not apply to 1 Consumable components such as contact tips cutting nozzles contactors brushes switches slip rings relays or parts that fail due to normal wear 2 Items furnished by Miller but manufactured by others such as engines or trade accessories These items are covered by the manufacturer s warranty if any 3 Equipment that has been modified by any party other than Miller or equipment that has been improperly installed improperly operated or misused based upon industry standards or equipment which has not had reasonable and necessary maintenance or equipment which has been used for operation outside of the specifications for the equipment MILLER PRODUCTS ARE INTENDED FOR PURCHASE AND USE BY COMMERCIAL INDUSTRIAL USERS AND PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF WELDING EQUIPMENT In the event of a warranty claim covered by this warr
12. Sparks can fly off from the welding arc The flying sparks hot workpiece and hot equipment can cause fires and burns Accidental contact of electrode to metal objects can cause sparks explosion overheating or fire Check and be sure the area is safe before doing any welding Remove all flammables within 35 ft 10 7 m of the welding arc If this is not possible tightly cover them with approved covers Do not weld where flying sparks can strike flammable material Protect yourself and others from flying sparks and hot metal Be alert that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas e Watch for fire and keep a fire extinguisher nearby Be aware that welding on a ceiling floor bulkhead or partition can cause fire on the hidden side Do not weld on closed containers such as tanks drums or pipes unless they are properly prepared according to AWS F4 1 see Safety Standards Do not weld where the atmosphere may contain flammable dust gas or liquid vapors such as gasoline Connect work cable to the work as close to the welding area as practical to prevent welding current from traveling long possibly unknown paths and causing electric shock sparks and fire hazards Do not use welder to thaw frozen pipes OM 249 914 Page 2 Remove stick electrode from holder or cut off welding wire at contact tip when not in use Wear oil free
13. fix the problem 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 distributor to receive the latest full line catalog or individual catalog sheets B TRAE Working as hard as you do every power source from Miller is backed by the most hassle free warranty in the business Miller TABLE OF CONTENTS SECTION 1 SAFETY PRECAUTIONS READ BEFORE USING 1 1 1 Symbol Usage ii 99 nr sede a NUN RERO MERE EX RU EE XR RN ER 1 1 2 Arc Welding Hazards use ERRARE MM 5 0 NURSE RE 8 8 3 9 mn REG 1 1 3 Additional Symbols For Installation Operation And Maintenance 3 1 4 California Proposition 65 Warnings 4 1 5 Principal Safety Standards iss ERES AERE EX ERG weed due pe Yr dies 4 1 6 EMF Information eleye matin a Rer eens de taeda etek eta ERR E ER led 4 SECTION2 DEFINITIONS kiai 3 6n hinh eite xo ef E EAEE anne 5 2 1 Warning Label Definitions For Wordless Labels 5 2 2 WEEE Label For Products Sold Within The EU 6 2 3 Symbols And
14. protective garments such as leather gloves heavy shirt cuffless trousers high shoes and a cap Remove any combustibles such as a butane lighter or matches from your person before doing any welding After completion of work inspect area to ensure it is free of sparks glowing embers and flames Use only correct fuses or circuit breakers Do not oversize or by pass them Follow requirements in OSHA 1910 252 a 2 iv and NFPA 51B for hot work and have a fire watcher and extinguisher nearby FLYING METAL or DIRT can injure eyes e Welding chipping wire brushing and grinding cause sparks and flying metal As welds cool they can throw off slag e Wear approved safety glasses with side shields even under your welding helmet BUILDUP OF GAS can injure or kill e Shutoff shielding gas supply when not in use e Always ventilate confined spaces or use approved air supplied respirator ELECTRIC AND MAGNETIC FIELDS EMF can affect Implanted Medical Devices e Wearers of Pacemakers and other Implanted Medical Devices should keep away e Implanted Medical Device wearers should consult their doctor and the device manufacturer before going near arc welding spot welding gouging plasma arc cutting or induction heating operations NOISE can damage hearing Noise from some processes or equipment can damage hearing e Wear approved ear protection if noise level is high CYLINDERS can explode if damaged S
15. 1 Owner s Record Please complete and retain with your personal records Model Name Serial Style Number Purchase Date Date which equipment was delivered to original customer Distributor Address Country Zip Postal Code For Service Contact a DISTRIBUTOR or SERVICE AGENCY near you Always provide Model Name and Serial Style Number Contact your Distributor for Welding Supplies and Consumables Options and Accessories Service and Repair Replacement Parts Owner s Manuals Contact the Delivering Carrier to File a claim for loss or damage during shipment 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 ITW Welding Products Italy S r l Via Privata Iseo 6 E 20098 San Giuliano Milanese Italy Phone 39 0 2982901 Fax 39 0 298290 203 email miller itw welding it Miller
16. 1 main board 5 pos 1 To maintain the factory original performance of your equipment use only Manufacturer s Suggested Replacement Parts Model and serial number required when ordering parts from your local distributor OM 249 914 Page 33 Notes Work like a Pro Pros weld and cut safely Read the safety rules at the beginning of this manual Miller 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 below ITW Welding Products Italy warrants to its original retail purchaser that new Miller equipment sold after the effective date of this limited warranty is free of defects in material and workmanship at the time it is shipped by Miller THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS Within the warranty periods listed below Miller will repair or replace any warranted parts or components that fail due to such defects in material or workmanship Miller must be notified in writing within thirty 30 days of such defect or failure at which t
17. F pa l CBI Fa Fa l d e et SJ 380 400V sA2 L v 12 EE 1 32A polt 50 60Hz E T E T T T F l Fai ES l ES PLOT 1 13 L w 13 2M ds FE 000000 20 298 JHP PC1 MAIN BOARD i N1 5 EE 26 OO A PCS DIGITAL METER BOARD N2 CONTROL BOX Figure 6 2 Circuit Diagram For STR 450 C OM 249 914 Page 28 RD PC1 MAIN BOARD ln SCR1 5 R1 5000 D SCR2 SCR4 56 5 56 6 J v2 JP21 REM CONNECTION REMOTE CONTROL n m Notes A SATE mE o CONTROL BOX 956142772 B OM 249 914 Page 29 SECTION 7 PARTS LIST Hardware is common and not available unless listed 956142770 2 5 B Figure 7 1 Case And Running Gear Item Dia Par No Mkgs No Description Quantity Figure 7 1 Case And Running Gear 1 wisst 156122085 Panel BH gt 9 23 lora 1 PR Du ee re Tes 156121042 Upper panel oo Ree uc Re rene 1 CRM ER 156011019 Eyebolt sol Tak Wee ak ed LU EDO 9 00 2 D Ass 156005129 Washer Hooking Support For Handle 2 um duro Manesco e uite 556009031 Washer Brass 26 35 3101 4 xe A 056054057 Wheel d 300 2 bb ui Erie en 156023156 Cup Retaining Wheel
18. If notified by the FCC about interference stop using the equipmentat once Have the installation regularly checked and maintained Keep high frequency source doors and panels tightly shut keep spark gaps at correct setting and use grounding and shielding to minimize the possibility of interference ARC WELDING can cause interference e Electromagnetic energy can interfere with sensitive electronic equipment such as computers and computer driven equipment such as robots e Be sure all equipment in the welding area is electromagnetically compatible To reduce possible interference keep weld cables as short as possible close together and down low such as on the floor Locate welding operation 100 meters from any sensitive elec tronic equipment Be sure this welding machine is installed and grounded according to this manual If interference still occurs the user must take extra measures such as moving the welding machine using shielded cables using line filters or shielding the work area OM 249 914 Page 3 1 4 California Proposition 65 Warnings A Welding or cutting equipment produces fumes or gases which contain chemicals known to the State of California to cause birth defects and in some cases cancer California Health amp Safety Code Section 25249 5 et seq A Battery posts terminals and related accessories contain lead and lead compounds chemicals known to the State of California to cause cancer and birth d
19. Keep away from pinch points such as drive rolls WELDING WIRE can injure e Do not press gun trigger until instructed to do so e Do not point gun toward any part of the body other people or any metal when threading welding wire LE 3 r MOVING PARTS can injure e Keep away from moving parts such as fans AJ e Keep all doors panels covers and guards closed and securely in place Have only qualified persons remove doors panels covers or guards for maintenance and troubleshooting as necessary Reinstall doors panels covers or guards when maintenance is finished and before reconnecting input power READ INSTRUCTIONS e Read and follow all labels and the Owner s Manual carefully before installing operating or servicing unit Read the safety information at the beginning of the manual and in each section Use only genuine replacement parts from the manufacturer Perform maintenance and service according to the Owner s Manuals industry standards and national state and local codes H F RADIATION can cause interference e High frequency H F can interfere with radio navigation safety services computers and communications equipment e Have only qualified persons familiar with electronic equipment perform this installation The user is responsible for having a qualified electrician prompt ly correct any interference problem resulting from the installa tion
20. OM 249 914B 2011 02 m Processes Miller Stick SMAW Welding Es TIG GTAW Welding Description ga ES El Arc Welding Power Source STR 350C 450C CE OWNERS MANUAL www MillerWelds com From Miller to You Thank you and congratulations on choosing Miller Now you can get the job done and get it done right We know you don t have time to do it any other way That s why when Niels Miller first started building arc welders in 1929 he made sure his products offered long lasting value and superior quality Like you his customers couldn t afford anything less Miller products had to be more than the best they could be They had to be the best you could buy Today the people that build and sell Miller products continue 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 most out of your Miller products Please take time to read the Safety precautions They will help you protect yourself against potential hazards on the worksite We ve made installation and operation quick and easy With Miller you can count on years of reliable service with proper maintenance And if for some reason the unit needs repair there s a Troubleshooting section that will help you figure out what the problem is The parts list will then help you to decide which exact part you may need to
21. Start TIG rr Stick Gauging n Transformer A Decrease QD Rectifier Internal Protection Lift Arc Start Fuse l P Rating S KVA GTAW Suitable For Areas E Gas Tungsten Arc IS Of Increased Panel Local Hot Start rae Arc Force DIG ax Rated Maximum Supply Current Lett Maximum Effective Supply Current O es OM 249 914 Page 7 SECTION 3 INSTALLATION 3 1 Important Information Regarding CE Products Sold Within The EU A 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 Wire feeders and ancillary equipment such as torches liquid cooling systems and arc striking and stabilizing devices as part of the welding circuit may not be a major contributor to the EMF See the Owner s Manuals for all components of the welding circuit for additional EMF exposure information The EMF assessment on this equipment was conducted at 0 5 meter e Ata distance of 1 meter the EMF exposure values were less than 20 of the permissible values 3 2 Serial Number And Rating Label Location The serial number and rating information for t
22. anty the exclusive remedies shall be at Miller s option 1 repair or 2 replacement or where authorized in writing by Miller in appropriate cases 3 the reasonable cost of repair or replacement at an authorized Miller service station or 4 payment of or credit for the purchase price less reasonable depreciation based upon actual use upon return of the goods at customer s risk and expense Miller s option of repair or replacement will be F O B Factory at ITW Welding Products Group Europe or F O B at a Miller authorized service facility as determined by Miller Therefore no compensation or reimbursement for transportation costs of any kind will be allowed TO THE EXTENT PERMITTED BY LAW THE REMEDIES PROVIDED HEREIN ARE THE SOLE AND EXCLUSIVE REMEDIES IN NO EVENT SHALL MILLER BE LIABLE FOR DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING LOSS OF PROFIT WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY GUARANTY OR REPRESENTATION AS TO PERFORMANCE AND ANY REMEDY FOR BREACH OF CONTRACT TORT OR ANY OTHER LEGAL THEORY WHICH BUT FOR THIS PROVISION MIGHT ARISE BY IMPLICATION OPERATION OF LAW CUSTOM OF TRADE OR COURSE OF DEALING INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE WITH RESPECT TO ANY AND ALL EQUIPMENT FURNISHED BY MILLER IS EXCLUDED AND DISCLAIMED BY MILLER milan warr 2011 0
23. ble 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 Use the 60 m 200 ft column to determine cable size pum 7 Weld Cable Size and Total Cable Copper Length in Weld Circuit Not Exceeding Weld Output bbc Terminals A Turn off power be fore connecting to weld output termi nals 45m 60m 70m 90m 105m 120m Do not use worn 30 m 100 ft or Less 450 fy 200 ft 250 ft 300ft 350ft 400 ft damaged under sized or poorly spliced cables 10 6096 60 100 Welding Duty Duty 10 100 Duty Cycle Amperes Cycle Cycle mm AWG mm AWG mm AWG 100 20 4 20 4 20 4 30 3 35 2 50 1 60 1 0 60 1 0 150 30 3 30 3 35 2 50 1 60 1 0 70 2 0 95 3 0 95 3 0 Negative Positive Terminal Terminal 200 30 3 35 2 50 1 60 1 0 70 2 0 95 3 0 120 4 0 120 4 0 250 35 2 50 1 60 1 0 70 0 95 8 0 120 4 0 2 o e o Ar 38 2x70 2x95 2x95 TN X X X E 9 EERE 300 50 1 60 1 0 70 2 0 95 3 0 120 4 0 o sa 2 0 2 ea 3 0 2 ca 3 0 s o 2x70 2x95 2x95 2x120 350 60 1 0 70 2 0 95 8 0 120 40 2 a 20 3 0
24. connecting HF5000 unit set amperage at 400 amps according to instructions in HF5000 owner s manual Notes Work like a Pro Pros weld and cut safely Read the safety rules at the beginning of this manual OM 249 914 Page 13 3 10 Typical Connections For Stick SMAW Welding a 956142770 1 5 B Ref 803 310 3 11 Typical Connections For TIG GTAW Welding 1 2 Remote output is always On in This unit automatically uses the TIG mode See Section 4 8 for scratch start TIG information Hot Start function for Stick weld ing is disabled in TIG mode remote control if connected to the remote receptacle see Section 3 9 Remote Hand Control Remote Foot Control OM 249 914 Page 14 3 12 Electrical Service Guide A Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard These recommendationsare for a dedicated branch circuit that applies to the rated output and duty cycle of the welding power source 3 Phase Model STR 350C STR450C Input Voltage V 380 380 Input Amperes A At Rated Output 38 50 Max Recommended Standard Fuse Rating In Amperes Time Delay Fuses 2 45 60 Normal Operating Fuses3 60 70 Min Input Conductor Size In mm AWG 4 6 10 10 8 Max Recommend
25. ector control is in the TIG Lift Arc or Stick positions TIG Lift Arc This is a DCEN direct current electrode negative process in which the electrode must come in contact with work piece to initiate an arc see Section 4 9 Make connections according to Section 3 11 TIG Remote This a GTAW process Make connections according to Section 3 11 CC Remote This is a DCEP direct current electrode positive process Make connections according to Section 3 10 Stick SMAW This is a DCEP direct current electrode positive process Make connections according to Section 3 10 When Stick is selected use arc force DIG control to increase SMAW short circuit amperage at low arc voltage This allows the operator to use a very short arc length without sticking the elec trode Switch Setting Output On Off Control TIG Lift Arc Electrode always energized Hot TIG Remote Through Remote 14 receptacle Remote on off switch required CC Remote Through Remote 14 receptacle Remote on off switch required Stick Electrode always energized Hot OM 249 914 Page 19 4 4 Hot Start And Arc Force DIG Controls All Models EY A AR A A Weld output terminals are energized when welding pro cess selector control is in the Stick posi
26. ed Input Conductor Length In Meters Feet 61 199 64 210 Min Grounding Conductor Size In mm AWG 4 6 10 10 8 Power cord supplied with the unit is sized for 230V operation Larger power cord may be required for cable lengths greater than 3 meters Consult national and local regulations Reference 2008 National Electrical Code NEC including article 630 1 If a circuit breaker is used in place of a fuse choose a circuit breaker with time current curves comparable to the recommended fuse 2 Time Delay fuses are UL class RK5 See UL 248 3 Normal Operating general purpose no intentional delay fuses are UL class K5 up to and including 60 amps and UL class H 65 amps and above 4 Conductor data in this section specifies conductor size excluding flexible cord or cable between the panelboard and the equipment per NEC Table 310 16 If a flexible cord or cable is used minimum conductor size may increase See NEC Table 400 5 A for flexible cord and cable requirements Notes OM 249 914 Page 15 3 13 Connecting Input Power A Installation must meet all Na tional and Local Codes have only qualified persons make this installation A Disconnect and lockout tag out input power before con necting input conductors from unit A Always connect green or green yellow conductor to supply grounding terminal first and never to a line ter minal
27. efects or other reproductive harm Wash hands after handling A This product contains chemicals including lead known to the state of California to cause cancer birth defects or other reproductive harm Wash hands after use 1 5 Principal Safety Standards Safety in Welding Cutting and Allied Processes ANSI Standard Z49 1 from Global Engineering Documents phone 1 877 413 5184 website www global ihs com Safe Practices for the Preparation of Containers and Piping for Welding and Cutting American Welding Society Standard AWS F4 1 from Glob al Engineering Documents phone 1 877 413 5184 website www global ins com National Electrical Code NFPA Standard 70 from National Fire Protec tion Association Quincy MA 02269 phone 1 800 344 3555 website www nfpa org and www sparky org Safe Handling of Compressed Gases in Cylinders CGA Pamphlet P 1 from Compressed Gas Association 4221 Walney Road 5th Floor Chantilly VA 20151 phone 703 788 2700 website www cganet com Safety in Welding Cutting and Allied Processes CSA Standard W117 2 from Canadian Standards Association Standards Sales 5060 Spectrum Way Suite 100 Ontario Canada L4W 5NS phone 800 463 6727 website www csa international org Safe Practice For Occupational And Educational Eye And Face Protec tion ANSI Standard Z87 1 from American National Standards Institute 1 6 EMF Information Electric current flowing through any conductor causes l
28. hielding gas cylinders contain gas under high pressure If damaged a cylinder can explode Since gas cylinders are normally part of the welding process be sure to treat them carefully Protect compressed gas cylinders from excessive heat mechani cal shocks physical damage slag open flames sparks and arcs Install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling or tipping Keep cylinders away from any welding or other electrical circuits Never drape a welding torch over a gas cylinder Never allow a welding electrode to touch any cylinder Never weld on a pressurized cylinder explosion will result Use only correct shielding gas cylinders regulators hoses and fit tings designed for the specific application maintain them and associated parts in good condition Turn face away from valve outlet when opening cylinder valve Keep protective cap in place over valve except when cylinder is in use or connected for use Use the right equipment correct procedures and sufficient num ber of persons to lift and move cylinders Read and follow instructions on compressed gas cylinders associated equipment and Compressed Gas Association CGA publication P 1 listed in Safety Standards 1 3 Additional Symbols For Installation Operation And Maintenance A FIRE OR EXPLOSION hazard e Do not install or place unit on over or near combustible surfaces e Do not install u
29. his product is located on the back Use rating label to determine input power requirements and or rated output For future reference write serial number in space provided on back cover of this manual 3 3 Specifications Max Amperes Input at Dimensions Rated Welding Ampere Open IP Rated Load Output Mode Output Range DC Circuit Rating 50 60 Hz hree PN KVA KW Weight L a H Voltage DC 380 V 350 A Net 132 kg 3502 34VoltsDC 20 350 A 70V IP23S 38A 25 3 17 2 em D t120x620x730 3596 Duty Cycle P 313 Ib 450 A Net 164 kg 4502 38Volts DC 20 450 A 70V IP23S 50A 32 8 24 6 Le D 1120x620 x 730 3596 Duty Cycle 384 Ib Notes OM 249 914 Page 8 3 4 Duty Cycle and Overheating 1021 Duty Cycle is percentage of 10 min utes that unit can weld at rated load Es without overheating If unit overheats thermostat s opens output stops and cooling 500 fan runs Wait fifteen minutes for unit to cool Reduce amperage or 450 duty cycle before welding NOTICE Exceeding duty cycle can damage unit and void warranty 400 o pun amp 350 E lt 5 300 250 200 150 0 10 20 30 40 50 60 70 80 90 100 Duty Cycle 35 Duty Cycle At 450 A 60 Duty Cycle At 350 A zm zm 3 5 Minutes Welding 6 5 Minutes Resting 6 Minutes Welding 4 Minutes Resting 100 Duty Cyc
30. ime Miller will provide instructions on the warranty claim procedures to be followed Miller shall honor warranty claims on warranted equipment listed below in the event of such a failure within the warranty time periods All warranty time periods start on the date the equipment was delivered to the original retail purchaser or one year after the equipment is shipped to a European distributor or eighteen months after the equipment is shipped to an International distributor 1 5 Years Parts 3 Years Labor Original main power rectifiers only to include SCRs diodes and discrete rectifier modules 2 3 Years Parts and Labor Engine Driven Welding Generators NOTE Engines are warranted separately by the engine manufacturer HF Units Inverter Power Sources Unless Otherwise Stated Process Controllers Semi Automatic and Automatic Wire Feeders Transformer Rectifier Power Sources 3 2 Years Parts Auto Darkening Helmet Lenses No Labor Migmatic 171 4 1 Year Parts and Labor Unless Specified Automatic Motion Devices Field Options NOTE Field options are covered under True Blue amp for the remaining warranty period of the product they are installed in or for a minimum of one year whichever is greater Induction Heating Power Sources Coolers and Electronic Controls Recorders Motor Driven Guns w exception of Spoolmate Spoolguns Positioners and Controllers Powered Air Purifying Respirator PAPR
31. l Regulations CFR Part 1910 Subpart Q and Part 1926 Subpart J from U S Government Printing Office Super intendent of Documents P O Box 371954 Pittsburgh PA 15250 7954 phone 1 866 512 1800 there are 10 OSHA Regional Offices phone for Region 5 Chicago is 312 353 2220 website www osha gov U S Consumer Product Safety Commission CPSC 4330 East West Highway Bethesda MD 20814 phone 301 504 7923 website WWW CpSC gov Applications Manual for the Revised NIOSH Lifting Equation The Na tional Institute for Occupational Safety and Health NIOSH 1600 Clifton Rd Atlanta GA 30333 phone 1 800 232 4636 website www cdc gov NIOSH 4 Keep head and trunk as far away from the equipment in the welding circuit as possible 5 Connect work clamp to workpiece as close to the weld as possible 6 Do not work next to sit or lean on the welding power source 7 Do not weld whilst carrying the welding power source or wire feeder About Implanted Medical Devices Implanted Medical Device wearers should consult their doctor and the device manufacturer before performing or going near arc welding spot welding gouging plasma arc cutting or induction heating operations If cleared by your doctor then following the above procedures is recom mended SECTION 2 DEFINITIONS 2 1 Warning Label Definitions For Wordless Labels Warning Watch Out There are possible hazards as
32. ld cables Q Weld Connections Every 6 Months Q Inside Unit 5 2 Help Displays A 2 ES 3 se 3 AL3 Display AL 1 AL2 AL3 Power On pilot light flashes when any of these help displays 1 AL1 Display 2 AL2 Display are shown A A Displays indicate a malfunction in the primary power circuit loss of input power phase If any of these displays are shown check input power con nections If trouble continues contact a Factory Authorized Service Agent 5 3 Troubleshooting Trouble Remedy No weld output fan does not run Be sure Power switch is On see Section 4 1 Be sure line disconnect switch is in On position Check and replace line fuses if open Reset breakers if necessary Fan does not run weld output okay Be sure nothing is blocking movement of fan If fan does not run freely replace fan motor Erratic or improper weld output Clean and tighten all weld cable connections Check for proper size and type of cable see Section 3 8 Check for proper input and output connections see Sections 3 8 and or 3 13 Replace electrode OM 249 914 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 proper
33. le At 270 A O Nx Continuous Welding Aor V gt gt gt 3 amp 5 Minutes Reduce Duty Cycle OM 249 914 Page 9 3 5 Volt Ampere Curves STR 350C The volt ampere curves show the normal minimum and maximum voltage and amperage output capa bilities of the unit 90 80 70 60 50 40 DC Volts 30 20 4 10 DC Amperes STR 450C 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 90 80 70 60 50 DC Volts 40 30 20 10 0 DC Amperes 0 20 40 60 80 100120140160 180 200220240260 280 300 320340360380 400420 440460480 OM 249 914 Page 10 3 6 Selecting A Location 2 1 Lifting Eye 2 Lifting Forks Use lifting eye or lifting forks to move unit Movement If using lifting forks extend forks beyond opposite side of unit 3 Line Disconnect Device Locate unit near correct input pow er supply A Special installation may be required where gasoline or volatile liquids are present see NEC Article 511 or CEC Section 20 OR Location And Airflow 3 3 7 Tipping xm A Do not move or operate unit where it could tip 956142770 5 5 B OM 249 914 Page 11 3 8 Weld Output Terminals and Selecting Cable Sizes NOTICE The Total Cable Length in Weld Circuit see ta
34. lt rating label for input power requirements and check power available at the job site they must match 2 Read Owner s Manual and inside labels for connection points and procedures 3 Move jumper links as shown on inside label to match voltage at job site O 4 Having a loop of extra length m connect grounding conductor 0 I 5 Connect line input conductors as shown on inside label double check all connections jumper link positions and input voltage before applying power 207 291 1 96 2 2 WEEE Label For Products Sold Within The EU Do not discard product where ap plicable with general waste Reuse or recycle Waste Electrical and Electronic Equipment WEEE by disposing at a designated collec tion facility Contact your local recycling office or your local distributor for further information OM 249 914 Page 6 2 3 Symbols And Definitions Welding SMAW Constant Current CC x 8 Duty Cycle Rated Supply Current Rated Welding Current Negative Weld Positive Weld Protective Earth Amperes Output Terminal Output Terminal D Ground Supplementar output O Pidieciar i O ofi on E Shielded Metal Arc Lv ing Hemot l L Rated No Load U Rated Supply ET Load voltage J gt Line Connection ie Sip pr Welding GTAW Shock Hazard Voltage Average Voltage Three Phase Current Increase Scratch
35. ly 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 Replace line fuse if open see Section 3 13 voltage Check for proper input and output connections see Sections 3 8 and or 3 13 Notes Work like a Pro Pros weld and cut safely Read the safety rules at the beginning of this manual OM 249 914 Page 24 Notes OM 249 914 Page 25 SECTION 6 ELECTRICAL DIAGRAMS 4 WARNING 2 ELECTRIC SHOCK HAZARD Do not touch live electrical parts Disconnect input power or stop engine before servicing Do not operate with covers removed Have only qualified persons install use or service this unit 51 1 _ U T1 i Xx Y 5 F 380 400V sA2 v 72 e 50 60Hz L2 LE F a 1 13 w rs Figure 6 1 Circuit Diagram For STR 350 C OM 249 914 Page 26
36. n nearby Welding fumes and gases can displace air and lower the oxygen level causing injury or death Be sure the breath ing air is safe Do not weld in locations near degreasing cleaning or spraying op erations The heat and rays of the arc can react with vapors to form highly toxic and irritating gases Do not weld on coated metals such as galvanized lead or cadmium plated steel unless the coating is removed from the weld area the area is well ventilated and while wearing an air supplied respirator The coatings and any metals containing these elements can give off toxic fumes if welded ARC RAYS can burn eyes and skin Arc rays from the welding process produce intense visible and invisible ultraviolet and infrared rays that can burn eyes and skin Sparks fly off from the weld Wear an approved welding helmet fitted with a proper shade of filter lenses to protect your face and eyes from arc rays and sparks when welding or watching see ANSI Z49 1 and Z87 1 listed in Safety Standards Wear approved safety glasses with side shields under your helmet Use protective screens or barriers to protect others from flash glare and sparks warn others not to watch the arc Wear protective clothing made from durable flame resistant material leather heavy cotton or wool and foot protection 7 WELDING can cause fire or explosion A Welding on closed containers such as tanks drums or pipes can cause them to blow up
37. nit near flammables e Do not overload building wiring be sure power supply system is properly sized rated and protected to handle this unit FALLING EQUIPMENT can injure e Use lifting eye to lift unit only NOT running gear gas cylinders or any other accessories e Use equipment of adequate capacity to lift and support unit e f using lift forks to move unit be sure forks are long enough to extend beyond opposite side of unit e Keep equipment cables and cords away from moving vehicles when working from an aerial location e Followthe guidelines in the Applications Manual for the Revised NIOSH Lifting Equation Publication No 94 110 when manu ally lifting heavy parts or equipment nn 41 OVERUSE can cause OVERHEATING e Allow cooling period follow rated duty cycle id e Reduce current or reduce duty cycle before e starting to weld again e Do not block or filter airflow to unit N FLYING SPARKS can injure e Wear a face shield to protect eyes and face x e Shape tungsten electrode only on grinder with proper guards in a safe location wearing proper face hand and body protection e Sparks can cause fires keep flammables away STATIC ESD can damage PC boards y e Puton grounded wrist strap BEFORE handling boards or parts e Use proper static proof bags and boxes to store move or ship PC boards Les N MOVING PARTS can injure e Keep away from moving parts e
38. njury The possible hazards are shown in the adjoining symbols or explained in the text Indicates a hazardous situation which if not avoided could result in death or serious injury The possible hazards are shown in the adjoining symbols or ex plained in the text NOTICE Indicates statements not related to personal injury 1 2 Arc Welding Hazards A The symbols shown below are used throughout this manual to call attention to and identify possible hazards When you see the symbol watch out and follow the related instructions to avoid the hazard The safety information given below is only a summary of the more complete safety information found in the Safety Standards listed in Section 1 5 Read and follow all Safety Standards A Only qualified persons should install operate maintain and repair this unit A During operation keep everybody especially children away ELECTRIC SHOCK can kill Touching live electrical parts can cause fatal shocks or severe burns The electrode and work circuit is electrically live whenever the output is on The input power circuit and machine internal circuits are also live when power is on In semiautomatic or automatic wire welding the wire wire reel drive roll housing and all metal parts touching the welding wire are electrically live Incorrectly installed or improperly grounded equipment is a hazard e Do not touch live electrical parts e Wear dry hole free insulating glove
39. not available unless listed 956142770 3 5 D Figure 7 2 Main Assembly Model Item Dia Part 350C 450C No _ 0005 Description Figure 7 2 Main Assembly oo Up usate 656089037 Clamp cable 1 1 A Deleted tocan AA AA ptm eren S pd E EUNTES Deleted ss r Cane dant a Mp URN ret elec atlas M E 156005130 Support voltage change board Tm eB eee 057098020 Choke 80x62x240 Al 1 e 057098019 Choke 80x70x180 Al 1 UO Luv rates 058021150 Transformer 380V STR 450 C 60x110x180 AI 1 29 eli 058021149 Transformer 380V STR 350 C 60x90x180 Al 1 wm 056159026 Thermostat 100c 10 A Ts m 056050159 Rectifier PTT 550 DAVA TH100 PTS10 1 AB re ka ity 056050158 Rectifier PTT 350 DAVA T100 PTS10 1 OM 249 914 Page 31 Item Dia No Mkgs Part No Quantity M ere 057028116 056020037 058040018 058040017 056076152 356029223 058066076 058075014 056059281 156006069 057035009 116117077 156118073 057014212 057014054 356029234 056076212 656081027 000175282 000604176 056067263
40. ocalized electric and magnetic fields EMF Welding current creates an EMF field around the welding circuit and welding equipment EMF fields may inter fere with some medical implants e g pacemakers Protective measures for persons wearing medical implants have to be taken For example access restrictions for passers by or individual risk assess ment for welders All welders should use the following procedures in order to minimize exposure to EMF fields from the welding circuit 1 Keep cables close together by twisting or taping them or using a cable cover 2 Do not place your body between welding cables Arrange cables to one side and away from the operator 3 Do not coil or drape cables around your body OM 249 914 Page 4 For Gasoline Engines A Engine exhaust contains chemicals known to the State of California to cause cancer birth defects or other reproduc tive harm For Diesel Engines A Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer birth defects and other reproductive harm 25 West 430 Street New York NY 10036 phone 212 642 4900 web site www ansi org Standard for Fire Prevention During Welding Cutting and Other Hot Work NFPA Standard 51B from National Fire Protection Association Quincy MA 02269 phone 1 800 344 3555 website www nfpa org OSHA Occupational Safety and Health Standards for General Indus try Title 29 Code of Federa
41. od metal to metal contact to workpiece or worktable as near the weld as practical e Insulate work clamp when not connected to workpiece to prevent contact with any metal object e Do not connect more than one electrode or work cable to any single weld output terminal SIGNIFICANT DC VOLTAGE exists in inverter weld ing power sources AFTER removal of input power e Turn Off inverter disconnect input power and discharge input capacitors according to instructions in Maintenance Section before touching any parts HOT PARTS can burn Do not touch hot parts bare handed Allow cooling period before working on equip ment e To handle hot parts use proper tools and or wear heavy insulated welding gloves and clothing to prevent burns OM 249 914 Page 1 FUMES AND GASES can be hazardous Welding produces fumes and gases Breathing these fumes and gases can be hazardous to your health Keep your head out of the fumes Do not breathe the fumes If inside ventilate the area and or use local forced ventilation at the arc to remove welding fumes and gases If ventilation is poor wear an approved air supplied respirator Read and understand the Material Safety Data Sheets MSDSs and the manufacturer s instructions for metals consumables coatings cleaners and degreasers Work in a confined space only if it is well ventilated or while wearing an air supplied respirator Always have a trained watch perso
42. ol All Models A Weld output terminals are energized when welding pro Pict cess selector control is in the TIG Lift Arc or Stick posi tions 1 Amperage Control Rotate control clockwise to in crease amperage o ec d t ame 94098 E g 1 4 7 Stick Start Procedure Scratch Start Technique 2 IE Ber as With Stick selected start arc as follows 1 Electrode 2 Workpiece 3 Arc 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 OM 249 914 Page 21 4 8 Scratch Start TIG This starting method is not accept able for critical applications since small tungsten particles may be come embedded in the workpiece and contaminate the weld Turn gas on Quickly 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 Ref WM Marketing 4 9 Lift Arc Start Procedures
43. ols means Warning Watch Out ELECTRIC SHOCK MOVING PARTS and HOT PARTS hazards Consult sym bols and related instructions below for necessary actions to avoid the hazards e Always verify the supply ground check and be sure that input power cord ground wire is properly connected to ground terminal in disconnect box or that cord plug is connected to a properly grounded receptacle outlet e When making input connections attach proper grounding conduc tor first double check connections e Keep cords dry free of oil and grease and protected from hot metal and sparks e Frequently inspect input power cord for damage or bare wiring replace cord immediately if damaged bare wiring can kill Turn off all equipment when not in use Do not use worn damaged undersized or poorly spliced cables Do not drape cables over your body If earth grounding of the workpiece is required ground it directly with a separate cable e Do not touch electrode if you are in contact with the work ground or another electrode from a different machine e Do not touch electrode holders connected to two welding ma chines at the same time since double open circuit voltage will be present e Use only well maintained equipment Repair or replace damaged parts at once Maintain unit according to manual e Wear a safety harness if working above floor level e Keep all panels and covers securely in place e Clamp work cable with go
44. rocess Make connections according to Section 3 10 Stick SMAW This is a DCEP direct current electrode positive process Make connections according to Section 3 10 Stick Gouging s o This is an air Stick welding holder Output ON Off Control Status which uses gouging electrodes for air carbon arc metal removal process When Stick is selected use arc force DIG control to increase SMAW short circuit amperage at low arc voltage This allows the operator to use a very short arc length without sticking the elec trode Switch Setting Output On Off Control TIG Lift Arc Electrode always energized Hot TIG Remote Through Remote 14 receptacle Remote on off switch required CC Remote Through Remote 14 receptacle Remote on off switch required Stick Electrode always energized Hot OM 249 914 Page 18 4 3 Welding Process Selection For STR 350 C 1 D Welding Process Selection Control Contactor Use control to select weld process The weld process selected determ ines weld output on off control See Table below A Oia 29 ke Slee so Output ON Off Control Status Weld output terminals are en ergized when welding precess sel
45. s and body protection e Insulate yourself from work and ground using dry insulating mats or covers big enough to prevent any physical contact with the work or ground e Do not use AC output in damp areas if movement is confined or if there is a danger of falling Use AC output ONLY if required for the welding process e If AC output is required use remote output control if present on unit e Additionalsafety precautions are required when any of the follow ing electrically hazardous conditions are present in damp locations or while wearing wet clothing on metal structures such as floors gratings or scaffolds when in cramped positions such as sitting kneeling or lying or when there is a high risk of unavoid able or accidental contact with the workpiece or ground For these conditions use the following equipment in order presented 1 a semiautomatic DC constant voltage wire welder 2 a DC manual stick welder or 3 an AC welder with reduced open circuit volt age In most situations use of a DC constant voltage wire welder is recommended And do not work alone e Disconnect input power or stop engine before installing or servicing this equipment Lockout tagout input power according to OSHA 29 CFR 1910 147 see Safety Standards e Properly install and ground this equipment according to its Owner s Manual and national state and local codes E Indicates special instructions e A T i This group of symb
46. shown by the symbols 1 Electric shock from welding electrode or wiring can kill 1 1 Wear dry insulating gloves Do not touch electrode with bare hand Do not wear wet or damaged gloves 1 2 Protect yourself from electric shock by insulating yourself from work and ground 1 8 Disconnect input plug or power before working on machine 2 Breathing welding fumes can be hazardous to your health 2 1 Keep your head out of the fumes 2 2 Use forced ventilation or local exhaust to remove the fumes 2 3 Use ventilating fan to remove fumes 3 Welding sparks can cause explosion or fire 3 1 Keep flammables away from welding Do not weld near flammables 3 2 Welding sparks can cause fires Have a fire extinguisher nearby and have a watchperson ready to use it 3 3 Do not weld on drums or any closed containers 4 Arc rays can burn eyes and injure skin 4 1 Wear hat and safety glasses Use ear protection and button shirt collar Use welding helmet with correct shade of filter Wear complete body protection 5 Become trained and read the instructions before working on the machine or welding 6 Do not remove or paint over cover the label OM 249 914 Page 5 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 1 Consu
47. tion 1 Arc Force DIG Control Control increases SMAW short cir cuit amperage at low arc voltage This allows the operator to use a very short arc length without stick ing the electrode Set control at 0 for normal welding amperage Turn control clockwise to increase short circuit amperage 2 Hot Start Control Used in Stick and CC mode Allows increasing the output amperage at the start of a weld Set control at 0 for normal welding output amperage Turn control clockwise to increase starting amperage 4 5 Output Control Selector All Models A E A o 22 an E zy na 04998 a V n VWV AN VUV VVVVVVVVVVVVVV AAA AAA A 9 VVV VVV VVI N Weld output terminals are energized when welding pro cess selector control is in the TIG Lift Arc or Stick posi tions 1 Output Control Selector Use switch to select way of con trolling unit output 2 PanelSelection LED LED illuminates when panel control is selected 3 Remote Selection LED LED illuminates when remote out put is selected Connect remote control to Remote 14 receptacle see Section 3 9 OM 249 914 Page 20 4 6 Amperage Contr
48. uit 32 A w rubber boot m Breaker Circuit 10 A w rubber boot 1 1 Clamp Cable 930 T sed Swilch 92 A rave ADI eu Pat rac E ale wae cA alee T i Nameplate Rear 115V 1 1 Replacement Parts Model and serial number required when ordering parts from your local distributor OM 249 914 Page 32 E Hardware is common and not available unless listed 3 956142770 4 5 D Figure 7 3 Front Panel Model Item Dia Part 350C 450C No _ 0005 Description Figure 7 3 Front Panel ze To ea toes thee 000193919 Knob pointer 1 250 dia SUE ceu 2 000193920 Knob pointer 840 dia 2 2 sur diate has 000171007 Knob pointer 1 660 dia 1 1 X line 356029222 Nameplate upper front STR 450 C 1 TA IEEE 356029227 Nameplate upper front STR 350 C 1 DNE 116145013 Plate PCB support 1 pO vele Rn 057084151 PC3 digital meter board 4 pos 1 xu utens uos 057084153 PC3 digital meter board 5 pos 1 dar ak acd A etd 057084152 PC1 main board 4 pos 1 cm 057084154 PC
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