background image

Operating the Machine in MMA mode

 

 
 
Connect the following: 
 

1. 

Negative welding power connector

 

Connect the earth cable dinse plug into here and twist to secure 
 

2. 

Positive welding power connector

 

Connect the electrode holder cable dinse plug into here and twist to secure 

 
 
Most popular rods have a  positive welding electrode and negative earth. If you are using 
special electrodes check the manufacturer’s  recommendation for correct polarity of welding 
electrodes and connect as required. 
 

1.  Ensure machine is setup as previously stated 
2.  Fit desired electrode size in electrode holder 
3.  Switch on machine 
4.  Set Mig/MMA switch to MMA position 
5.  Select desired welding power 
6.  Touch electrode on to workpiece and the arc will start 

 
 

When  the  machine is switched on, output terminals are always live, take care and do 
not touch electrode and earth by person at 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 plug from socket 
before working on this equipment.  
Have a qualified electrician install & service this equipment.  
                                       
Allow machine to sit for 5 minutes minimum after disconnection from mains power to allow the 
power capacitors to discharge before working inside this equipment.  
  
Do not touch electrically live parts  
  

1. Periodically (3-6 months depending on use / environment), remove the side/top panels 

of machine and clean out machine with a low pressure dry air line paying particular 
attention to PC Boards, Fan blades and switchgear  Failure to maintain plant can void 
manufacturer’s warranty.   

2. Inspect input and output cables & hoses for fraying and cuts, replace if damaged 

present   

3. Keep the MIG torch and earth cables in good condition   
4. Clean the air vents to ensure proper air flow and cooling   
5. The fan motor has sealed bearings which requires no maintenance  

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...

Page 2: ......

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...

Page 18: ......

Page 19: ......

Reviews: