3
1.2 Protect yourself from electric shock by insulating
yourself from work and ground.
1.3 Disconnect input plug or power before working on
machine.
2 Breathing welding fumes can be hazardous to your
health.
2.1 Keep your head out of fumes.
2.2 Use forced ventilation or local exhaust to remove
fumes.
2.3 Use ventilating fan to remove fumes.
3 Welding sparks can cause explosion or fire.
3.1 Keep flammable materials away from welding.
3.2 Welding sparks can cause fires. Have a fire extingui-
sher nearby and have a watchperson ready to use it.
3.3 Do not weld on drums or any closed containers.
4 Arc rays can burn eyes and injure skin.
4.1 Wear hat and safety glasses. Use ear protection and
button shirt collar. Use welding helmet with correct
shade of filter. Wear complete body protection.
5 Become trained and read the instructions before
working on the machine or welding.
6 Do not remove or paint over (cover) label.
2 GENERAL DESCRIPTIONS
2.1 POWER SOURCE
The MULTIMIG 621 is an equipment suitable for synergic
pulsed MIG/MAG, synergic not pulsed MIG/MAG and
conventional MIG/NAG welding, developed with inverter
technology. The power source is equipped with a 2-roller
wire feeder.
This welding machine must not be used to defrost pipes.
2.1.1 Explanation of technical specifications
This machine is manufactured according to the following
international standards: IEC 60974.1 - IEC 60974.5 -IEC
60974.10 CL. A - IEC 61000-3-12 (see note 2)
N°.
Serial number. Must be indicated on any
request regarding the welding machine.
3~
f
1
f
2
Three-phase static frequency converter
Transformer - rectifier.
MIG Suitable for MIG-MAG welding.
U0.
Secondary open-circuit voltage.
X.
Duty cycle percentage. The duty cycle
expresses the percentage of 10 minutes
during which the welding machine may run
at a certain current without overheating.
I2.
Welding current
U2.
Secondary voltage with current I2
U1.
Rated supply voltage
1~ 50/60Hz 50- or 60-Hz single-phase power supply.
I1 Max
Max. absorbed current at the corresponding
current I2 and voltage U2.
I1 eff
This is the maximum value of the actual
current absorbed, considering the duty
cycle. This value usually corresponds to the
capacity of the fuse (delayed type) to be used
as a protection for the equipment.
IP23S
Protection rating for the housing.
S
Suitable for use in high-risk environments.
NOTE:
1- The machine has also been designed for use in
environments with a pollution rating of 1. (See IEC
60664).
2-
This equipment complies with IEC 61000-3-12
provided that the maximum permissible system
impedance Zmax is less than or equal to0,107 at
the interface point between the user's supply and the
public system. It is the responsibility of the installer
or user of the equipment to ensure, by consultation
with the distribution network operator if necessary,
that the equipment is connected only to a supply with
maximum permissible system impedance Zmax less
than or equal to 0,107.
3 DESCRIPTION OF POWER SOURCE (Fig. 1)
A – Socket (-): this is where the earth cable is to be
connected.
B – Central adapter: Connect the welding torch.
C – Connector: For connecting remote controls and the
welding control cable Push–Pull.
F - Connector: Connector type DB9 (RS232 serial line)
to use for updating the microprocessor programs.
G – Pressure switch socket. Socket which receives the
cable from the pressure switch located inside the
cooling unit (optional).
H – Fuse holder.
I - Socket. Socket which receives the power supply
cable of the cooling unit (optional).
L - ON/OFF switch.
M – Power cable.
N – Gas hose.
O – Cylinder support.
P – Cylinder support straps.
3.1 COOLING UNIT (optional).
This cooling unit was designed to cool the welding torches
used for MIG/MAG welding. It must be used exclusively
with this power source.
3.2 DESCRIPTION OF PROTECTIVE DEVICES.
3.2.1 Coolant pressure protective device.
This protection is achieved by means of a pressure switch,
inserted in the fluid delivery circuit, which controls
a microswitch. Low pressure is indicated by the
abbreviation
H2O flashing on the display AM.
3.2.2 Fuse (T 2A/250V - Ø 5x20).
This fuse is inserted to protect the motor pump, and is
located on the rear panel of the welding machine
H.
3.2.3 Positioninng on sloping planes.
Since this welding machine is equipped with wheels
without brake, make sure the machine is not positioned
on sloping planes, to avoid tilting or noncontrolled motion
of the machine itself.
