Preface; Introduction; Product Introduction; Operation Safety - Kemppi MINARC 120 Operating Instructions Manual

1. PREFACE

1.1. INTRODUCTION

Congratulations on having purchased a KEMPPI product. Properly installed and used KEMPPI
products should prove to be productive machines requiring only a small amount of regular
maintenance.
This manual is arranged to give you a good understanding of the equipment and its safe use. There
is also information on both servicing the unit as well as its technical data. Read the instructions
before taking the machine into use or servicing it for the first time. Additional information on
Kemppi products and their use can be obtained from Kemppi or a Kemppi dealer.
The specifications and designs presented in this manual are subject to change without prior
notice.
In this document, for danger to life or injury the following symbol is used:
Read the warnings carefully and follow the instructions. Please also study the operation safety
instructions and respect them when installing, operating and servicing the machine.

1.2. PRODUCT INTRODUCTION

Kemppi Minarc 120, 150 is a Manual Metal Arc welding machine, small in size, suitable for
industry, site and repair welding. The unit uses one phase connection voltage.
Minarc 120, 150 is equipped with so called Voltage Reduction Device (VRD) function to avoid
danger of electric shock. VRD maintains open circuit voltage under 35 V.
Minarc tolerates a great fluctuation of input voltage and is thus suitable for work on sites using
generator as well as to be used with long power cables. Inverter technology has been used when
designing the unit. Power regulation in power source is done with IGBT transistors. Welding and
earth cables are supplied with the unit. They are equipped with suitable electrode holder, earth
clamps and connections for the unit.
Minarc can also be used for TIG welding. TIG arc is started by scratching. Ordering numbers of
additional equipment for TIG welding can be found under 5. Ordering numbers.

1.3. OPERATION SAFETY

Read the warning texts carefully and follow the instructions.
Arc and welding spatter
Arc and the reflected radiation from it can damage unprotected eyes. Shield your eyes and protect
your surroundings appropriately before you start welding. Arc and welding spatter will burn
unprotected skin. When welding, use protective gloves and clothing.
Danger of fire and explosion
Observe the fire safety instructions. Remove flammable material around the place where you will
weld. Have necessary fire extinguishing equipment at hand when you weld. Note dangers caused
by special jobs, such as risk of fire and explosion when welding tanks. Note! Sparks may ignite
fire even hours later!
Welding is working with fire, note special instructions for such work.
Mains voltage
Never take welding machine inside the work piece (e.g. container or car). Never set the welding
machine on wet surface. Replace faulty cables immediately, they create a danger to life and can
cause a fire. See that the connecting cable does not stick nor touch sharp edges or a hot welding
piece.
© KEMPPI OY MINARC 120, 150 / 0546 – 3