Standard Accessories - Kennedy EMW220 Manual

- Lubricating the gears.
SHOULD BE CARRIED OUT WITH THE WELDING MACHINE
SWITCHED OFF AND DISCONNECTED FROM THE POWER
SUPPLY OUTLET.
- Never lift the welding machine .
2. INTRODUCTION AND GENERAL DESCRIPTION
This welding machine is a power source used for arc welding and has
been designed specifically for MAG welding of carbon steel and low-
alloy steel with either CO or Argon/CO mixture shielding gas using
2
solid or cored (tubular) electrode wires. They are also suitable for MIG
welding of stainless steel using Argon gas + 1-2% oxygen and of
aluminium with Argon gas using electrode wires with a composition
suited to the piece to be welded (only models in Fig. B
It is also possible to use cored wires in applications without protective
gas by adapting the polarity of the torch to the wire manufacturer's
recommendations (Model in Fig. B

STANDARD ACCESSORIES:

- torch;
- return cable complete with earth clamp;
- wheels kit (in models on wheels).
3. TECHNICAL DATA
DATA PLATE
The most important data regarding use and performance of the
welding machine are summarised on the rating plate and have the
following meaning:
1- EUROPEAN standard of reference, for safety and construction of
arc welding machines.
2- Symbol for internal structure of the welding machine.
3- Symbol for welding procedure provided.
4- Symbol S: indicates that welding operations may be carried out in
environments with heightened risk of electric shock (e.g. very
close to large metallic volumes).
5- Symbol for power supply line:
1~: single phase alternating voltage;
3~: 3-phase alternating voltage.
6- Protection rating of the covering.
7- Technical specifications for power supply line:
- U : Alternating voltage and power supply frequency of welding
1
machine (allowed limit ±10%).
- I : Maximum current absorbed by the line.
1 max
- I : : effective current supplied.
1eff
8- Performance of the welding circuit:
- U : maximum no-load voltage (open welding circuit).
0
- I /U : current and corresponding normalised voltage that the
2 2
welding machine can supply during welding.
- X : Duty cycle: indicates the time for which the welding machine
can supply the corresponding current (same column). It is
expressed as %, based on a 10 min. cycle (e.g. 60% = 6 minutes
working, 4 minutes pause, and so on).
If the usage factors (on the plate, referring to a 40°C
environment) are exceeded, the thermal safeguard will trigger
(the welding machine will remain in standby until its temperature
returns within the allowed limits).
- A/V-A/V: shows the range of adjustment for the welding current
(minimum maximum) at the corresponding arc voltage.
9- Manufacturer's serial number for welding machine identification
(indispensable for technical assistance, requesting spare parts,
discovering product origin).
10- : Size of delayed action fuses to be used to protect the
power line.
11- Symbols referring to safety regulations, whose meaning is given in
chapter 1 "General safety considerations for arc welding".
Note: The data plate shown above is an example to give the meaning
of the symbols and numbers; the exact values of technical data for the
welding machine in your possession must be checked directly on the
data plate of the welding machine itself.
OTHER TECHNICAL DATA
- WELDING MACHINE:
- TORCH:
The welding machine weight is shown in table 1
(TAB. 1).
4. DESCRIPTION OF THE WELDING MACHINE
CONTROL, ADJUSTMENT AND CONNECTION DEVICES
5. INSTALLATION
WARNING!
CARRY OUT ALL INSTALLATION OPERATIONS AND
ELECTRICAL CONNECTIONS WITH THE WELDING MACHINE
COMPLETELY SWITCHED OFF AND DISCONNECTED FROM
THE POWER SUPPLY OUTLET.
2
).
1
uses only flux core wire).
2
Fig. A
see table 1 (TAB.1)
see table 2 (TAB.2)
Fig. B , B
1 2
THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND
EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL.
Unpack the welding machine, assemble the separate parts contained
in the package.
Assembling the protective mask
Assembling the return cable-clamp
HOW TO LIFT THE WELDING MACHINE
None of the welding machines described in this manual is equipped
with a lifting device.
SITE
Locate the welding machine in an area where openings for cooling air
are not obstructed (forced circulation with fan), leave at least 250mm
free space around the welding machine; check that conductive dusts,
corrosive vapours, humidity etc., will not enter welding machine.
WARNING! Position the welding machine on a flat surface
with sufficient carrying capacity for its weight, to prevent it from
tipping or moving hazardously.
CONNECTION OF PLUG AND SOCKET (only applicable to
models supplied without plug): connect a normalised plug (2P + T
for 1ph, 3P + T for 3ph) having sufficient capacity- to the power cable
and prepare a mains outlet fitted with fuses or an automatic circuit-
breaker; the special earth terminal should be connected to the earth
conductor (yellow-green) of the power supply line. Table 1 (TAB.1)
shows the recommended delayed fuse sizes in amps, chosen
according to the max. nominal current supplied by the welding
machine, and the nominal voltage of the main power supply.
- To carry out voltage change operations(only the 3-phase version),
take off the panel to gain access to the inside of the machine, and
prepare the voltage change terminal board so that the connection
indicated on the special indicator plate corresponds to the available
power supply voltage.
Reassemble the panel carefully using the appropriate screws.
Warning!
In the factory the machine is set at the highest voltage of the
available range, e.g.
U 400V Ü Voltage setting at the factory.
1
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, make sure the rating data
of the welding machine correspond to the mains voltage and
frequency available at the place of installation.
- The welding machine should only be connected to a power supply
system with the neutral conductor connected to earth.
- To comply with the requirements of the EN 61000-3-11 (Flicker)
standard we recommend connecting the welding machine to
interface points of the power supply that have an impedance of less
than Zmax =0.1 ohm.
- the welding machine falls within the requisites of IEC/EN 61000-3-
12 standard.
WARNING!
Failure to observe the above rules will make the (Class 1) safety
system installed by the manufacturer ineffective with
consequent serious risks to persons (e.g. electric shock) and
objects (e.g. fire).
CONNECTION OF THE WELDING CABLES
WARNING!
CONNECTIONS MAKE SURE THE WELDING MACHINE IS
SWITCHED OFF AND DISCONNECTED FROM THE POWER
SUPPLY OUTLET.
Table 1 (TAB. 1) gives the recommended values for the welding cables
2
(in mm ) depending on the maximum current supplied by the welding
machine.
Connection to the gas bottle (if used)
- Gas bottle can be loaded on welding machine bottle support
platform: max 20 kg.
- Screw the pressure reducing valve(*) onto the gas bottle valve,
inserting the appropriate adapter supplied as an accessory, for
when the gas used is Argon or an Argon /CO mixture.
- Connect the gas inlet pipe to the pressure-reducing valve and
tighten the band supplied.
- Loosen the adjustment ring nut on the pressure-reducing valve
before opening the bottle valve.
(*) Accessory to be purchased separately if not supplied with the
product.
- 5 -
PREPARATION
Fig. C
Fig. D
Fig. E
Fig. F
BEFORE MAKING THE
2
FOLLOWING