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INSTRUCTIONS

SUPERMIG 250/10

Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions 

and properly maintained, give you years of trouble free performance.

01284 757500

01284 703534

E-mail

[email protected]

SUPERMIG250-Job181-280198

2.   INTRODUCTION & DESCRIPTION

These instructions are to assist you prepare your mig set for welding together with information on maintenance, and trouble shooting. Read this

manual carefully in order to get the best results from your welding set. The instructions are not intended to show you how to be an expert welder.

It is with continued practice that you will achieve the desired results. Mig welding requires a steady hand, time spent practising with scrap metal

will gain rewards when you progress to an actual workpiece. 

Supermig 250/10 

is a compact power source fitted with a heavy duty wire feed motor. The wire feed system itself is automatic thus providing

the best possible opportunity to achieve the most effective weld. The machine operates on a forced air cooling system to slow the transformer

heating in order to increase the duty cycle, and a non live torch to prevent the risk of accidentally striking an arc.

IMPORTANT

:  

BEFORE USING THIS PRODUCT, PLEASE READ THE INSTRUCTIONS CAREFULLY. MAKE CAREFUL NOTE OF SAFETY iNSTRUCTIONS,

WARNINGS AND CAUTIONS. THIS PRODUCT SHOULD ONLY BE USED FOR ITS INTENDED PURPOSE. FAILURE TO DO SO MAY CAUSE DAMAGE

OR PERSONAL INJURY, AND WILL INVALIDATE THE WARRANTY.

1.    SAFETY INSTRUCTIONS

1.1

ELECTRICAL SAFETY. 

WARNING!  It is the user’s responsibility to check the following:

You must

check all electrical equipment and appliances to ensure they are safe before using. 

You must 

inspect power supply leads, plugs and all electrical

connections for wear and damage. 

You must

ensure the risk of electric shock is minimised by the installation of appropriate safety devices. An RCCB (Residual

Current Circuit Breaker) should be incorporated in the main distribution board. We recommend that an RCD (Residual Current Device) is used with all electrical

products. It is particularly important to use an RCD together with portable products that are plugged into an electrical supply not protected by an RCCB. If in doubt

consult a professional electrician. You may obtain a Residual Current Device by contacting your Sealey dealer. 

You must

also read and understand the following

instructions concerning electrical safety.

1.1.1. The

Electricity At Work Act 1989

requires all portable electrical appliances, if used on a business premises, to be tested 

by a qualified person at least once a year by using a Portable Appliance Tester (PAT).

1.1.2. The 

Health & Safety at Work Act 1974

makes owners of electrical appliances responsible for the safe condition of the appliance, 

and the safety of the appliance operator. 

If in any doubt about electrical safety, contact a qualified electrician.

1.1.3. Ensure the insulation on all cables and product itself is safe before connecting to mains power supply. See 1.1.2. use a (PAT).

1.1.4. Ensure that cables are always protected against short circuit and overload.

1.1.5. Regularly check power supply, leads, plugs and all electrical connections for wear or damage, especially power connections 

to ensure none are loose. 

1.1.6. Check the voltage marked on the product is the same as the electrical power supply to be used. Check fused plugs 

are fitted with correct capacity fuse.

1.1.7. DO NOT pull or carry the powered appliance by its power supply lead. Products such as welders 

must not be pulled or carried by their output cables.

1.1.8. DO NOT pull power plugs from sockets by the power cable.

1.1.9. DO NOT use worn or damage leads, plugs or connections. Immediately replace or repair

by qualified persons. A U.K. 3 pin plug with ASTA/BS approval  is fitted. In case of damage,

cut off and fit a new plug according to the following instructions (UK only - see diagram at right).

1.2

GENERAL SAFETY

p

p

p

WARNING: 

unplug the welder from the mains power supply before performing maintenance or service.

3

Keep the welder and cables in good working order and condition. 

Take immediate action to repair or replace damaged parts.

3

Use recommended parts and accessories only. 

Non recommended parts may be dangerous and will invalidate the warranty.

3

Check the gas cup and contact tip, and spray regularly with anti-spatter spray available from your Sealey dealer.

Note: to remove gas cup ready instruction part 3.3.6. carefully.

3

Use an air hose to regularly blow out any dirt from the liner, and keep the welder clean for best and safest performance.

3

Locate the welder in an adequate working area for its function, and ensure the area is well ventilated.

3

Keep working area clean and tidy and free from unrelated materials. Also ensure the working area has adequate lighting.

p

p

p

WARNING: 

use welding head shield to protect your eyes against ultraviolet rays, and safety welding gauntlets. 

3

Keep children and unauthorised persons away from the working area.

3

Turn voltage switch to "0" (off) when not in use.

3

Stand correctly keeping a good footing and balance, and ensure the floor is not slippery.

3

Remove ill fitting clothing, remove ties, watches, rings, and other loose jewellery, and contain long hair.

7

DO NOT store gas cylinders in areas where temperature exceeds 50°C.

7

DO NOT puncture or damage the gas cylinder. 

7

DO NOT use the welder in damp or wet locations. 

p

p

p

DANGER! 

DO NOT weld near inflammable materials, solids, liquids, or gases.

7

DO NOT operate welder while under the influence of drugs, alcohol or intoxicating medication, or if fatigued.

7

DO NOT operate the welder if it or its cables are damaged.

7

DO NOT allow untrained persons to operate the welder.

7

DO NOT pull the welder by the cable, or the torch, and DO NOT bend the torch.

Blue

Neutral 

wire

Yellow 

& Green 

Earth wire 

Brown Live wire

13 amp 

3 pin

plug

a) Ensure the unit is correctly earthed via a three-pin plug.

b) Connect the Green/Yellow earth wire to the earth terminal ‘E’.

c) Connect the Brown live wire to live terminal ‘L’.

d) Connect the Blue neutral wire to the neutral terminal ‘N’.

WARNING!  

If you use the machine constantly at it’s 

higher

power 

settings, the welder must be plugged into a 30amp fused power 

supply. If you are unsure if there is a 30amp supply at your premises,

contact a qualified electrician before proceeding further. (For the use 

of a normal 13amp supply follow plug fitting instructions.

Summary of Contents for SUPERMIG 250

Page 1: ...t short circuit and overload 1 1 5 Regularly check power supply leads plugs and all electrical connections for wear or damage especially power connections to ensure none are loose 1 1 6 Check the voltage marked on the product is the same as the electrical power supply to be used Check fused plugs are fitted with correct capacity fuse 1 1 7 DO NOT pull or carry the powered appliance by its power su...

Page 2: ...that the earth clamp is away from the torch tip Connect the welder to the mains power supply and set the voltage switch to one 3 3 8 Set the wire speed knob to position 5 or 6 Keeping the torch cable as straight as possible and press the torch switch The wire will feed through the torch 3 3 9 When wire has fed through switch welder off unplug from mains a Take torch in left hand and screw contact ...

Page 3: ...ed system which for most effective welding should be set up as follows 4 2 1 Select the voltage step that best suits the thickness of the material to be welded 4 2 2 Adjust the wire feed knob until a perfect weld bead is obtained NOTE If the wire speed increases even to reaching maximum do not be concerned as the wire speed setting will re adjust correctly to any voltage step selected thereafter 4...

Page 4: ...card or expensive machine repairs To keep the contact tip free from spatter we recommend the use of Sealey anti spatter spray MIG 722307 available from your Sealey Dealer 6 5 Replacing the Liner Wind the wire back on to the spool and secure it Unscrew the torch from the machine and undo the brass nut The liner should now be visible Pull it out and replace with a new one 6 6 Changing Fuses The fuse...

Page 5: ...ectly held Wire weaving in weld pool Weld current too high Weld speed too low Weld current too high Weld speed too low Arc too long Weld current too high Arc too long Weld current too high weld speed too slow incorrect distance of torch to workpiece Tension too great Gas cup contact tip clogged DEFECT POSSIBLE CAUSE REMEDY Numbers refer to chapter and item heading 7 TROUBLESHOOTING Protection auto...

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