6 – MASTER MLS™ 2500, 2503, 3500, 3503, MASTERTIG MLS™ 3000, 3003, 4000, 4003 / 0606
© KEMPPI OY
2.7. WELDING CABLE CONNECTIONS
2.7.1. Choosing welding polarity in MMA welding
You can change the welding polarity by choosing (+) or (-) cable connector.
2.7.2. Earthing
If possible, always fasten the earth clamp of return current cable directly onto work piece.
1. Clean contact surface of earth clamp from paint and rust.
2. Fasten clamp properly, so that contact surface is as large as possible.
3. Check that clamp is fastened firmly.
2.8. COOLING UNIT TO (MASTERCOOL 10, MASTERCOOL 12)
Cooling liquid is injurious! Avoid also contact with skin or eyes. In case of injury, seek
for medical advice.
Cooling unit Mastercool 10 and Mastercool 12 together with TIG torch of Kemppi’s TTC-W range
enables TIG welding with water-cooled torch.
The cooling unit is installed beneath the power source with screws. Electrical connections are on
the bottom of power source. Fill the reservoir with a 20 - 40 % mixture of glycol and water, or
with any other suitable antifreeze. The capacity of the reservoir is 3 litres.
Mastercool 10:
Mastercool 12:
Mastertig MLS™ 3000
Mastertig MLS™ 3003
Mastertig MLS™ 4000
Mastertig MLS™ 4003
Installation of cooling unit