Westweld NB-250LB Instruction Manual Download Page 5

 

 

 

 

Do not put your hand close to fans and do not move the brake handle while operating. 

 

Please remove the connection between the engine and the welding equipment to avoid sudden starting during 
maintenances. 

 

When engine is hot, it is forbidden to open the airtight cover of the radiator water tank to avoid hurt by the hot 
vapor. 

Electromagnetic

: Welding current going though any area can generate electromagnetic, as well 

as the welding equipment itself. 

 

Electromagnetic would affect cardiac pacemaker, the cardiac pacemaker users should consult 

one’s doctor first. 

 

The effect of electromagnetic to one’s health is not confirmed, and it might have some negative effect to one’s 
health. 

 

Welders may use following method to reduce the hazardous of electromagnetic: 

a. Bundle the cable connected to the work piece and the welding cable together. 
b. Do not enwind partially or entirely your body with the cable. 

c. Do not place yourself between the welding cable and the ground (work piece) cable, if the welding cable is by 

your left side, then the ground cable should be by your left side too. 

d. The Welding cable and the ground cable are as short as possible. 

e. D            e. Do not work near to the welding power source. 

Lifting equipment

: carton or wooden boxes package the welding machines supplied by 

Huayuan. There is no lifting equipment in its wrapper. Users can move it to the prospective area 
by a fork-lift truck, then open the box. 

 

If there are rings, the machine can be transited by rings. While Huayuan Welding Machine 
Manufacture reminds users, there is potential risk to damage the welding machine. So it is better 
to push the welding machine by its rollers unless special situations. 

 

Be sure that the appurtenances are all removed off when lifting. 

 

When lifting, make sure that there is no person below the welding machine, and remind people 
passing by at any moment. 

 

Do not move the hoist too fast.

 

10 

Noise

: Huayuan Welding Machine Manufacture reminds users: Noise beyond the limit (over 80 

db) can cause injury to vision, heart and audition depending on oneself. Please consult local 
medical institution. Use the equipment after doctor’s permission would help to keep healthy. 

                                             

 

                     

 

 

 

 

 

Summary of Contents for NB-250LB

Page 1: ...NB 250 270 315LB MIG MAG CO2WELDING MACHINE MANUAL INSTRUCTION...

Page 2: ...ING THIS MANUAL AND THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT And most importantly think before you act and be careful Special Attention Very Important AVOID FALLING DOWN WHEN THE WELDING MACHINE IS...

Page 3: ...water for cooling Never simultaneously touch electrically hot parts of electrode holders connected to two welders because voltage between the two can be the total of the open circuit voltage of both w...

Page 4: ...damaged Make sure that the gas in the storage cylinder is qualified for welding and the decompression flowmeter the adapter and the pipe are all in good condition Always keep cylinders in an upright...

Page 5: ...able if the welding cable is by your left side then the ground cable should be by your left side too d The Welding cable and the ground cable are as short as possible e D e Do not work near to the wel...

Page 6: ...f working principles 2 Main electric diagram 3 Block schematic diagram Panel function introduction 2 Rear Panel Function Drawing 3 Gas bottle bracket Optional introduction and installation drawing Ins...

Page 7: ...ircuit the diameter of ball on wire end almost the same as wire diameter high success rate at arc striking 3 Usage Widely applied in the fields of automobile steel furniture filing cabinet security do...

Page 8: ...no sunshine shooting rain dust etchant gas and combustibles the environment temperature is to be in the range of 10 40 The machine should be placed in where there is no metal waste Keep the welding po...

Page 9: ...is no out putting from the welding machine it can work again after the temperature dropping When welding current is lower than 200A the gas flow is 8 15L min when the welding current is larger than 2...

Page 10: ...r flue jammed or cooling fan damaged 7 Change over switch of welding gas checking before welding to adjust the shield gas flow turn it on gas checking Turn it on welding position when welding 8 Change...

Page 11: ...l fuse holder used for short connect protection of welding machine control circuit inside fuse 1 5A 5 Over current protection switch Air switch welding machine have abnormal disconnect the power sourc...

Page 12: ...g Note if buy gas bottle bracket together machine please remove the two rear wheels and install them on the support plate of bracket Then install U style bracket and done refer to Fig 5 and 6 Fig 7 is...

Page 13: ...with wet hands Do not put anything on the power cable Connect all the parts well Install according to the below orders Connect the three phase power cable to the power switch of distribution box well...

Page 14: ...ip into the wire guide pipe it reach torch connector through guide tube press the wire wheel and fasten it with suitable strength B Make sure the diameter of contact tip is same as the used electrode...

Page 15: ...or it can not be opened and repaired in 5 minutes after cutting off power 2 Maintenance A Check connectors at fixed period to see if they become flexible or if there is poor contact B Keep machine cle...

Page 16: ...o many air holes on welding seam 1 CO2 gas is not pure 2 The gas flow is not enough 3 There is grease dirt or rust on welding seam 4 The wind in the welding place is too heavy 5 CO2 gas circuit is blo...

Page 17: ...r there is noise in machine 1 The fast recovery diode is damaged 2 IGBT is damaged 3 Circuit or other components are damaged 1 Check and replace the damaged fast recovery diode 2 Replace IGBT or PCB 3...

Page 18: ...1 0 7 1 1 1 2 1 8 1 7 1 5 2 0 2 1 2 2 2 3 2 4 2 5 AP1 8 6 8 9 8 8 9 1 27V 27V 8V 26V 1 00 9 9 RT2 PA1 6 0 5 9 5 7 5 8 V1 L4 2 6 HL1 7 5 7 6 7 8 KT1 7 7 C 5 R 1 7 8 EV1 C1 1 TA2 R 6 C8 C1 2 V2 4 2 4 4...

Page 19: ...erved to Westweld Huayuan Company If there is any changes in the user s manual forgive not to inform separately Westweld Ltd 4 23 4 No 51 Xuefu Avenue Nanan Chongqing China E mail info westweld com sa...

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