CHIEF MULTISPOT M25AL Manuel D'instructions page 3

C. Welding wire and drive parts are at welding volta-
ge during operation - keep hands and metal objects
away.
1 Electric shock from welding electrode or wiring can kill.
1.1 Wear dry insulating gloves. Do not touch electrode
with bare hand. Do not wear wet or damaged gloves.
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 SPECIFICATIONS
The machine has been designed and built for welding
ferrous and non-ferrous stud bolts, Ø 3, 4, 5, 6 and 8 mm.
This welding system uses the extremely rapid (2-3 ms)
discharge of a battery of charged capacitors, which allows
the welding of stud bolts with contact point start-up.
2.2 EXPLANATION OF THE TECHNICAL
SPECIFICATIONS LISTED ON THE MACHINE
PLATE
N° Serial number, which must be indicated on any
request regarding the welding machine
Single-phase transformer-rectifier with device
1 ~
for charging and discharging the capacitors
U0 Secondary open-circuit voltage
E Welding energy
C Capacity value
Uc Voltage adjustable on the capacitors
U1 Rated supply voltage. The machine is set up for
voltages of 120V and 240V with automatic
voltage change.
1-50/60Hz 50- or 60-Hz single-phase power supply
I1 Max Max. absorbed current at the corresponding
supply voltage.
I1 Eff This is the current absorbed considering the duty
cycle at the corresponding input voltage.
IP21S Protection rating for the housing.
Note:
The machine has also been designed for use in
environments with a pollution rating of 3. (See IEC 60664).
2.3 DESCRIPTION OF PROTECTIVE DEVICES
2.3.1 Thermal protection
This machine is protected by a thermostat, which prevents
the machine from operating if the allowable temperatures
are exceeded. Under these conditions the fan keeps
running and the display will show "Warning 08".
3 INSTALLATION
WARNING
See complete listing of safety messages at the beginning
of this manual.
Only skilled personnel should install the machine. All
connections must be carried out according to current
regulations, and in full observance of safety laws.
1. Do not place the welding machine on floor with
inclination greater than 10°.
Air must circulate freely, both incoming and outgoing,
and the welding machine must be protected from entry
by liquids, dirt, metal filings, etc.
2. Make sure that the supply voltage is either 120 volts
and a minimum of 20 amp service or 240 volt and a
minimum of 20 amp service. If connected to a circuit
protected by fuses, use time dely fuse marked "D".
Use a plug Nema type 5-20P for 120 V and make sure
that the "green conductor" of the power supply cable
is connected to the ground or "earth" terminal. Make
sure that the white wire is connected to the W plug
terminal.
Use a plug Nema type 6-20P for 240 V and make sure
that the "green conductor" of the power supply cable
is connected to the ground or "earth" terminal. Make
sure that the white wire is connected to the Y plug
terminal.
The machine must be switched off when changing
the power supply.
3. Pacemaker wearers are prohibited from using the
machine or approach the cables.
4. Fully insert the earth cable plug into the socket B and
turn clockwise.
5. Fully insert the gun plug into the socket C and turn
clockwise.
6. Turn on the welding machine using the E switch.
(start-up and shutdown should not be repeated
frequently, because dissipating the energy contained
in the capacitors may cause overheating and damage).
7. To limit exposure to the magnetic field, keep the gun
cable on the side of the hand holding it, avoiding
wrapping the cable around.
3