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Safety Precautions

 

 

 

Read entire section before starting installation  

 

 

WARNING! 

 

 

 

 

Electric Shock can kill – Only qualified personnel should perform this installation. Turn off 
input power at the fuse box before working on this equipment.

  

Do not touch electrically live 

parts. Always connect the machine to an earthed mains supply as per national recommended 
standards.  

 

 

 

 

Select suitable location 

 

 

 

Place the welder where clean cooling air can freely circulate in and out of the front & rear 
louver vents. Dirt, dust or any foreign material that can be drawn through vents into welder 
must be kept to a minimum. Failure to observe these precautions can result in excessive 
operating temperatures which can lead to plant failure.  
  

Grinding 

 

  
Do not direct grinding particles towards the welder. An abundance of conductive material can 
cause plant failure.  

 

 

Stacking 

 

 

 

This machine cannot be stacked.  

Transport – Unloading 

 

  
Never underestimate the weight of equipment, never move or leave suspended in the air 
above people. Use recommended lifting equipment at all times.  

  
 
                                          

 

WARNING! 

 

 

Falling Equipment can cause injury. Never lift welder with gas bottle attached. Never lift above 
personnel.  

Tilting 

 

 

 

Machine must be placed on a secure level surface or on a recommended 
undercarriage/trolley. This machine may topple over if this procedure is not followed.  
  

Environmental Rating 

 

 

 

The welding power source carries the IP21S rating. It may be used in normal industrial and 
commercial environments. Avoid using in areas where water / rain is around.  
  
Read and follow the ‘Electric Shock Warnings’ in the safety section if welding must be 
performed under electrically hazardous conditions such as welding in wet areas or water on 
the work piece.  

 
 

Summary of Contents for PRO-MIG250

Page 1: ...www r techwelding co uk email sales r techwelding co uk Tel 01452 733933 Fax 01452 733939 PRO MIG250 PORTABLE INVERTER MIG MAG MMA WELDER OPERATING INSTRUCTIONS Version 2017 1...

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Page 3: ...of machine Product PRO MIG250 Serial No ___________________________________ Date of Purchase _____________________________ Where Purchased _____________________________ Whenever you request replacemen...

Page 4: ...MMA 200Amps Welding Capability Duty Cycle Equipment Limitations The R Tech PRO MIG250 is rated at 250 Amps at 35 and 200 Amps 60 duty cycle on a ten minute basis If the duty cycle is exceeded a therma...

Page 5: ...rticles towards the welder An abundance of conductive material can cause plant failure Stacking This machine cannot be stacked Transport Unloading Never underestimate the weight of equipment never mov...

Page 6: ...sible and enclose as much of them as possible in metal conduit or equivalent shielding There should be a good electrical contact between this conduit and ground Earth 2 Keep the work and electrode lea...

Page 7: ...a 240V 50 60Hz 1 Phase 22A supply It comes with a 2 metre mains cable attached Connect wires according to national coding Brown wire Live Blue wire Neutral Green Yellow Wire Earth Ground Connecting t...

Page 8: ...ic shock keep the MIG torch in good condition and replace if any of the insulation is damaged 3 Mains input cable Fit required plug as per legal requirements 4 Gas inlet connection Connect gas hose to...

Page 9: ...e has cooled down The light will go off and welding may be carried out again 6 Warning LED This warning light will come on under these situations to warn of either low input voltage has been sensed or...

Page 10: ...g causing unwanted Burn back into tips or erratic weld beads size 3 Wire Feed Drive Assembly Make sure rollers are correct size for wire diameter selected to change roller size release retaining screw...

Page 11: ...n be dangerous Keep your head out of fumes gases produced from welding Use ventilation or exhaust to remove fumes gases from breathing zone and general area WARNING WELDING SPARKS can cause fire or ex...

Page 12: ...her and stops it snarling at rollers To fit a Teflon liner remove steel liner from torch and fit Teflon liner so you have about 10 inches left coming out end of MIG torch at the machine end In the bra...

Page 13: ...ET 3 0 CARBON STEEL 0 6 A18 ARGON 5 CO2 3 5 6 98 LAP JOINT 1 0 CARBON STEEL 0 6 A18 ARGON 5 CO2 1 5 4 62 LAP JOINT 2 0 CARBON STEEL 0 6 A18 ARGON 5 CO2 3 5 84 LAP JOINT 3 0 CARBON STEEL 0 6 A18 ARGON...

Page 14: ...EL 0 8 A18 ARGON 5 CO2 6 5 8 5 165 LAP JOINT 4 0 CARBON STEEL 0 8 A18 ARGON 5 CO2 7 9 186 LAP JOINT 5 0 CARBON STEEL 0 8 A18 ARGON 5 CO2 8 9 5 209 LAP JOINT 6 0 CARBON STEEL 0 8 A18 ARGON 5 CO2 9 10 2...

Page 15: ...BON STEEL 1 0 A18 ARGON 5 CO2 6 6 182 LAP JOINT 5 0 CARBON STEEL 1 0 A18 ARGON 5 CO2 6 7 218 LAP JOINT 6 0 CARBON STEEL 1 0 A18 ARGON 5 CO2 6 5 9 230 LAP JOINT 8 0 CARBON STEEL 1 0 A18 ARGON 5 CO2 8 1...

Page 16: ...same time otherwise an electric shock will occur Maintenance Routine and periodic maintenance WARNING ELECTRIC SHOCK CAN KILL Turn the input power OFF at the mains switch fuse box and remove mains plu...

Page 17: ...ecure and torch switch operation try replacing MIG torch No output Power light is lit Warning light is lit Welding application may have exceeded recommended duty cycle allow machine to cool down until...

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