Alfain PEGAS 350 AC/DC PULSE User manual

ALFA IN a.s. © www.alfain.eu PEGAS 350 AC-DC PULSE manual EN 02
WELDING MACHINE
PEGAS 350 AC/DC PULSE
OPERATING MANUAL

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CONTENT:
. INTRODUCTION ...................................................................................... 3
2. SAFETY PRECAUTIONS ......................................................................... 4
3. TECHNICAL DATA ................................................................................... 6
4. EQUIPMENT ............................................................................................ 7
5. OPERATOR CONTROLS......................................................................... 8
6. GETTING STARTED .............................................................................. 2
7. TWO STOKE AND FOUR STROKE IN TIG MODE ................................ 7
8. BASIC SETTINGS FOR TIG WELDING ................................................. 8
9. ROUTINE MAINTANCE & INSPECTION ............................................... 9
0. STATEMENT OF WARRANTY .............................................................. 9
. DISPOSAL ............................................................................................. 20

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1. INTRODUCTION
Dear consumer,
Company ALFA IN a.s. thanks you for buying our product and believe that you
will be satisfied with our machine.
This Operating Manual has been designed to instruct you on the correct use and
operation of your ALFA IN product. Your satisfaction with this product and its
safe operation is our ultimate concern. Therefore please take the time to read
the entire manual, especially the Safety Precautions. They will help you to avoid
potential hazards that may exist when working with this product.
Read and understand this entire Manual and your employer’s safety practices
before installing, operating, or servicing the equipment. While the information
contained in this Manual represents the Manufacturer's best judgement, the
Manufacturer assumes no liability for its use.
PEGAS 350 AC/DC PULSE welds by those methods:
. TIG DC (Lift arc or High Frequency ignition)
2. TIG AC (Lift arc or High Frequency ignition)
3. MMA DC coated electrodes up to 4,0 mm
4. MMA AC coated electrodes up to 4,0 mm
Welding machine may be operated only by trained persons and only in the
technical provisions. Company ALFA IN a.s. accept no responsibility for damage
caused by improper use. Before commissioning please read carefully this
manual.
The machine complies with the appropriate CE mark.
For maintenance and repairs, use only original spare parts. There is of course a
complex of our services.
We reserve the law of adjustments and changes in case of printing errors,
change of technical paramaters, accessories etc. without previous notice. These
changes may not be reflected in the manuals for use in paper or electronic form.

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2. SAFETY PRECAUTIONS
. Once the packing has been opened, make sure that the machine is not
damaged. If in any doubt, call the service centre.
2. This equipment must only be used by qualified personnel.
3. During installation, any electric work must only be carried out by trained
personnel.
4. The machine must be used in a dry place with good ventilation.
5. Make sure that no metal dust can be drawn in by the fan inside the
machine, as this could cause damage to the electronic circuits.
6. It is prohibited to connect more than one inventer generator in series or in
parallel.
7. When installing the machine, follow the local regulations on safety.
8. The position of the machine must allow easy access by the operator to the
controls and connectors.
9. When the welding machine is operating, all its covers and doors must be
closed and well fixed.
0. Do not expose the welding machine to direct sunlight or to heavy rain. This
equipment conforms to protection rating IP23S.
. During welding, the welding cables must be located near or at ground level.
They should be as short as possible.
2. The operator must wear gloves, clothes, shoes, and a helmet or a welder’s
helmet, which protect and are fire-resistant in order to protect him against
electric shock, flashes and sparks from welding.
3. The operator must protect his eyes with safety visor or mask designed for
welding, fitted with standard safety filters. He should also be aware that
during electrical welding ULTRAVIOLET RADIATION is emitted. Therefore
it is vital that his face is also protected from radiation. Ultraviolet rays
produce the same harmful effect as sun burning on unprotected skin.
4. The operator is obliged to warn anyone near the welding area of the risks
that welding involves and to arrange to provide adequate protection
equipment.
5. It is very important to arrange for sufficient ventilation, especially when
welding in enclosed spaces. We suggest using suitable fume extractors to
prevent the risk of intoxication by fumes or gas generated by the welding
process.
6. The operator must ensure all flammable materials are removed from the
work area to avoid any risk of fire.
7. The operator must NEVER weld containers that have previously contained
petrol, lubricants, gas or similar flammable materials, even if the container
has been empty for a considerable time. THERE IS A VERY HIGH RISK
OF EXPLOSION.
8. The operator must be aware of all the special regulations which he needs
to conform to when welding in enclosed spaces with a high risk of
explosion.
9. To prevent electric shock, we strongly suggest the following rules:

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a. Do not work in a damp or humid environment.
b. Do not use the welding machine if its cables are damaged in any
way.
c. Make sure that the earthing system of the electric equipment is
correctly connected and operational.
d. The operator must be insulated from the metal components
connected to the return wire.
e. The earthing of the piece being worked could increase the risk of
injury to the operator.
EN 60974- Standard: Open-circuit voltage. During the operation of the
machine, the highest voltage, with which it is possible to come into contact, is
the open-circuit voltage between the welding clamps.
The maximum open-circuit voltage of the welding machines is established by
national and international standards (EN 60974- ) depending on the type of weld
current to be used, on its waveform and on the hazards arising from the work
place. These values are not applicable to the strike currents and those for
stabilisation of the arc that could be above it.
The open-circuit voltage, for as many adjustments as possible, must never
exceed the values relating to the various cases shown in the following table:
Case
Working conditions Open-circuit voltage
Places with increased risk of
electric shock
DC current: 3V
peak value
AC current: 68V
peak value and
48V effective
2 Places without increased risk
of electric shock
DC current: 3V
peak value
AC current: 3V
peak value and
80V effective
3
Torches held mechanically
with increased protection for
the operator
DC current: 4 V
peak value
AC current: 4 V
peak value and
00V effective
In case , the DC welding machines with rectifier must be built in such a way
that, in case of a fault developing in the rectifier (for example open circuit, short
circuit or lack of power), the permitted values cannot be exceeded.
20. Before opening the machine switch off the machine and disconnect it from
the power socket.
2 . Only personnel authorised by this company can carry out maintenance on
the machine.
NOTE:
Device complies with IEC 6 000-3- 2 with following conditions:
Short-circuit power Ssc of network in place at an interface between the user's
supply and the public network (PCC) must be least 358 kW.
User is obliged to consult with the electricity supplier if the impedance of the
network at this point is that required short-circuit capacity Zmax = 45 mΩ and
whether the device can be connected with a public low-voltage network.
On the nameplate are the following symbols: .

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ELECTROMAGNETIC COMPATIBILITY
The welding device is in terms of interference designed primarily for industrial
areas. It meets the requirements of EN 60974- 0 class A and it isn’t designed
for using in residential areas, where the electrical energy is supplied by public
low-voltage power supply network. It can be here potential problems with
ensuring of electromagnetic compatibility in this areas, due to interference
caused by power lines as well as the radiated interference.
During operation, the device may be the source of interference.
Caution
We warn users, that they are responsible for possible interference from
welding.
3. TECHNICAL DATA
Method
MMA - AC
MMA - DC
TIG - AC TIG - DC
Mains voltage V/Hz 3x400/50-60
Welding current range A 30 - 300 5 - 350 30 - 350 5 - 350
Open-circuit voltage U20 V 78,0 8 ,0 78,0 77,0
Mains protection A 25 @
Max. effective current I eff A 2 ,6 6,9
Welding current (DC= 00%) I2 A 270 270 280 280
Welding current (DC=60%) I2 A 300 330 340 340
Welding current (DC=x%) I2 A 60%=300 45%=350 50%=350 50%=350
Protection
IP23S
Standards
EN 60 974- , EN 60 974- 0 cl.A
Dimensions (w x l x h) mm 492 x 89 x 873
Weight kg 88,0
Cooling power (Q= l/min) kW --- 0,74
Total liquid content l --- 4,0
Max. pressure Bar --- 3,5
Max. flow l/min --- 8,0
C ution Due to the size of installed power can be for connecting device to
public distribution network necessary the agreement from distribution
establishment.

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4. EQUIPMENT
CONTENT OF DELIVERY
Item No. Description Qu ntity
5.0277 PEGAS 350 AC/DC PULSE
5.0 89 Set of Connectors for PEGAS AC/DC AERO
ACCESSORIES TO ORDER
Item No. Description
VM0 84- Hose Gas ATA PULSE PEGAS 3m G /4, D 9.5 HD
VM0025 Earthing cable 3 m 500 A 50-70
VM0 85 Cable with E holder 3 m 400 A 35-70
8SCSL4A Torch PARKER SGT 8SC 4m 35-50 AERO
8SCSL8A Torch PARKER SGT 8SC 8m 35-50 AERO
8SCSL4AUD Torch PARKER SGT 8SC 4m 35-50 AERO UD
8SCSL8AUD Torch PARKER SGT 8SC 8m 35-50 AERO UD
6008 Pressure Reducer FIXICONTROL Ar 2 manometers GCE
6 24 Pressure Reducer BASECONTROL Ar 2 manometers
6 25 Pressure Reducer BASECONTROL CO2 2 manometers
5.0 74A Foot Pedal Remote CTRL 3 m PEGAS incl. Connector
AERO
S777 Welding Helmet ALFA IN S777
S7S Welding Helmet ALFA IN S7S, S7SU

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5. OPERATOR CONTROLS
MAIN PARTS
Fig. – Main parts
Pos. Description
A ON/OFF switch
A2 On/Off Switch - cooling
A3 Control panel
A4 Quick connector (+)
A5 Quick connector (-)
A6 Connector - remote control
A7 Gas connector - exit
A8 Solenoid Valve
A9 Mains cable
A CU PEGAS 350 cooling unit
A 2 Cup
A 3 Quick connector W (red)
A 4 Quick connector W (blue)

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OPERATING PANEL
Fig. 2 Operating panel
Pos
.
Design tion
Descrip
tion
T
ON/OFF switch
T2
Button for moving to the right on
parameter
s
curve.
T3 Encoder
T4
LED AC frequency (just TIG AC). The
higher current, the more the maximal
frequency decreases.
50
-
250 Hz
T5
Button for moving to the left on
parameters cur
ve.
T6
Switch - cooling unit pump ON/OFF. If
the switch illuminated, pump was turned
on.
T7
Button switches pulsed/no pulsed
mode
.
T8
LED PULSE. If illuminated the PULSE
mode was set.
T9 Switch button HF/LIFT ARC
T 0
LED HF. If illuminated the HF ignition
was set.

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T
Gas test
T 2
LED Gas test. If illuminated the mode of
setting the gas flow was selected (by
means of the gas valve on the gas
cylinder). To turn it off press the button
again or it will go off this mode after
5
s.
T 3
Button TIG 2T or 4T
T 4
LED Four stroke (4T)
T 5
LED Two stroke (2T)
T 6
Button switch
AC/DC
mode
.
T 7
LED DC
T 8
LED AC
T2
Current
display
T22 Display voltage, %, time and Hz.
T23
LED Voltage (V). If illuminated there are
values in V on the display
T22.
T24
LED Time (s). If illuminated there are
values in s on the display
T22.
T25
LED %. If illuminated there are values in
% on the display
T22.
T26
LED Hz. If illuminated there are values
in Hz on the display
T22.
T27
LED ON
T28
LED ALARM. If illuminated there is
under or over voltage in the mains or the
machine is overheated. At the same
t
ime the displays show Err 00 .
T29
LED watercooled torch unit fault. If the
flow of cooling liquid is insufficient,
machine aktivity lights and is blocked.
Active just in watercooled torch mode.
(T30
lights
).
T30
LED watercooled torch. If illuminated, by
T32 button was set type of water torch.
T3
LED gascooled torch. If illuminated, by
T32 button was set type of gas torch
.
T32
Switch button of cooling type according
to selected torch.
T33
LED ARC FORCE for MMA

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0
–
0.
T34
LED HOT START 0 – 0.
T35
LED Arc Length 0 – 0.
T36
LED MMA. If illuminated the MMA mode
was set.
T37
LED Balance (just TIG AC). Used for
elimination of the aluminium oxides.
Range 5 – 50 %, default 5% (more in
the text below).
Fig. 3 Parameters curve
Pos. Description
T4
LED
P
regas
0,
–
0
s
T42
LED
S
tart c
urrent
5
–
350A
in DC,
30
–
350A
in
AC
T43 LED Up slope 0 – 0 s
T44 LED Main welding current 5 – 350 A TIG DC, 30 – 350 TIG AC
5
–
350
MMA DC,
30
–
350
MMA AC
T45 LED Main welding current in pulse mode
5 – 350 A DC, 0 – 200 TIG AC
T46 LED Ratio of the pulse current and the base current 5 – 00 %
Just for the pulse mode
.
T47 LED Pulse frequency 0,5 – 200 Hz
Just in the pulse mode.
T48
LED
P
ulse base current
5
–
350
A DC,
30
-
350
A AC.
T49
LED
D
own slope
0
–
0 s
T50 LED End current 5 – 350A in DC, 30 – 350A in AC
Just in 4T.
T5
LED Post gas
0,
–
0 s

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6. GETTING STARTED
Getting started must be consistent with technical data and conditions of use.
GETTING STARTED MMA – COATED ELECTRODE
Fig. 4 Getting started MMA
C Quick Connector (+)
C2 Quick Connector (-)
C3 Quick Connector male
C4 Earthing Clamp
C5 Clamp – Electrode Holder
. Insert the mains plug into a suitable 3x400 V mains socket, 50-60 Hz. The
supply fuses or circuit breaker should correspond to the technical data
stated in this manual.
2. Connect the welding cables to the panel quick connectors (+) C1 and (-)
C2 according the instruction on the electrodes packing.
3. Switch the machine on by the ON/OFF switch A1.
4. Set the welding current by means of encoder T3. The values will be
showed on the display T21.
5. It is possible to change the settings of the HOT START (increase of current
during arc ignition time), ARC FORCE (an automatic increase of the
welding current in case the electrode touches the welding piece) and Arc
Length by means of the button T36 and the encoder T3.
6. Then switch to the MMA mode by means of the button T36. LEDs T26,

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T27 a T28 may not illuminate.
7. Connect the earthing clamp to the weldment.
8. Insert into the electrode holder the appropriate electrode and you can start
welding.
NOTE Prevent touching the electrode any metal material for in this mode
the terminals C1 and C2 are under current.
Insert the coated electrode into the electrode holder, connect the clamps of the
ground cable to the welding piece and you may start welding.
GETTING STARTED TIG
TIG MODE WITH WATERCOOLED TORCH
Fig. 5 Connection of the watercooled torch
B Quick Connector (+)
B2 Connector – Remote Control
B3 Gas Connector
B4 Quick Connector (-)
B5 Quick Connector W (red)
B6 Quick Connector W (blue)
B7 Quick Connector male
B8 Quick Connector Torch W (red)
B9 Quick Connector Torch W (blue)

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B 0
Torch TIG
. Insert the mains plug into a suitable 3x400 V mains socket, 50-60 Hz.
2. Connect the watercooled torch to the front panel, see fig. above.
3. Connect the earting clamp to the quick connector (+).
4. Connect the gas hose to the gas cylinder connector on the gas bottle and
to the connector A8 on the rear panel.
5. Switch the machine on by the ON/OFF switch A1.
6. Switch the cooling unit on by the switch T6.
7. Select with button T32 the water cooling of the torch. LED T30 will shine.
8. Activate with button T11 gas test and set the required flow of the protective
gas. LED T12 will shine.
9. Select with button T13 TIG 2T or 4T. The appropriate LED T14, T15 will
shine.
0. Select with button T16 AC or DC method. Method must have the
appropriate tungsten electrode and grinding method. The appropriate LED
T18, T19 will shine.
. Set with encoder T3 the required welding current.
2. The others parameters is possible modify with appropriate buttons and
encoder T3. The appropriate LED will shine. The required parameter is
automatically saved, when you go over to the next parameter or after
3 s of the encoder inactivity. For more information see OPERATING
PANEL.
3. You can start welding.
TIG MODE WITH GASCOOLED TORCH
Fig. 6 Connection of the gascooled torch
. Insert the mains plug into a suitable 3x400 V mains socket, 50-60 Hz.

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2. Connect the gascooled torch to the front panel, see fig. above.
3. Connect the earting clamp to the quick connector (+).
4. Connect the gas hose to the gas cylinder connector on the gas bottle and
to the connector A8 on the rear panel.
5. Switch the machine on by the ON/OFF switch A1.
6. Select with button T32 the gas cooling of the torch. LED T31 will shine.
7. Activate with button T11 gas test and set the required flow of the protective
gas. LED T12 will shine.
8. Select with button T13 TIG 2T or 4T. The appropriate LED T14, T15 will
shine.
9. Select with button T16 AC or DC method. Method must have the
appropriate tungsten electrode and grinding method. The appropriate LED
T18, T19 will shine.
0. Set with encoder T3 the required welding current.
. The others parameters is possible modify with appropriate buttons and
encoder T3. The appropriate LED will shine. The required parameter is
automatically saved, when you go over to the next parameter or after
3 s of the encoder inactivity. For more information see OPERATING
PANEL.
2. You can start welding.
Caution Make sure, that in gascooled torch welding method is the cooling
unit turned off. At turning of the cooling unit on and at choise of the gascooled
torch can happened the pump damage.
BALANCE FUNCTION IN AC MODE
Function allows to set the ratio between the cleaning effect (plus part of the
wave) and the penetration (minus part of the wave).
Shape of the current
curve
BALANCE Value 5% Value 50%
Cleaning effect Smallest Biggest
Penetration Deep Shallow
Level of wear of the
tungsten electrode Smaller Bigger

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REMOTE CONTROL
PEGAS 350 AC/DC PULSE can work in both of TIG modes with two types of
remote control.
. TIG torch with UP-DOWN buttons for selecting size of welding current.
2. Foot pedal.
Remote controls are connected with connector A6.
Fig. 7 - Foot pedal remote control
Pos. Description
P Stepping surface
P2 Potentiometer of setting the limit of maximal welding current
P3 Connector (connect to matching connector A6)
. When you connect the connector P3 to matching connector A6 on the front
panel, the function setting the current from the front panel will blocked,
instead of that the max. current is limited by the potentiometer P2.
2. With potentiometer P2 on the foot pedal is possible limit the maximal
current.
3. By pressing the stepping surface P1 down, you start the welding process.
The value of the welding current depends on the level of pressing the
stepping surface. To reach the maximal current limited by potentiometer
P2 requires to gently pressing to the lowest position of the stepping surface
P1. The set current will be displayed on the current display T21 see fig. n.
2.
4. The welding process ends after releasing the stepping surface P1.

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7. TWO STOKE AND FOUR STROKE IN TIG MODE
TWO STROKE – 2T
FOUR STROKE – 4T
BILEVEL – SECOND WELDING CURRENT
When the machine is in 4T mode, there is always active the BILEVEL function.
The value of the second current is automatically set to 50% of the pre-set value
of the main welding current. To enter the second welding current press the torch
button for a short time and release it. To get back to the main welding current
press the torch button for a short time and release it.
Gas
Pregas Postgas
Down slope
Current
Gas
Down slope
Post
gas
Up slope
Pregas
Welding current
Current
Welding current

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8. BASIC SETTINGS FOR TIG WELDING
Table for stainless steel, DC current:
Material
thickness
mm
Tungsten
electrode
diameter
mm
Filler material
diameter mm
Welding
current
A
Argon flow
l/min
Gas
nozzle
mm
,5
40
-
60
3
0
,5
,5
,5
50
-
90
4
0
2 2 2 80- 00 4 2
3
2
-
3
2
-
3
90
-
40
5
2
4
-
5
3
-
4
3
-
4
0
-
80
5
2
Table for Aluminium and aluminium alloys, AC current:
Material
thickness
mm
Tungsten
electrode
diameter
mm
Filler
material
diameter
mm
Welding
current
A
Argon
flow
l/min
Gas
nozzle
mm
Pre
heating
°C
2
,6
45
-
60
7
-
9
8
-
,5
2
,6
-
2
50
-
80
7
-
9
8
-
2
2,5
2
-
2,5
90
-
2
0
8
-
2
8
-
2
-
3
3
3
50
-
8
0
8
-
2
8
-
2
-
4
4
4
80
-
200
0
-
5
8
-
2
-
5
4
3
-
4
80
-
240
0
-
5
0
-
2
-
Table for Cuprum, DC current:
Material
thickness
mm
Tungsten
electrode
diameter
mm
Filler
material
diameter
mm
Welding
current
A
Argon
flow
l/min
Gas
nozzle
mm
Pre
heating
°C
,5 2 70-80 4 0 50
2
2,5
3
20
-
40
5
0
50
3
3
3
30
-
60
5
0
200

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9. ROUTINE MAINTANCE & INSPECTION
. The only routine maintenance required for the PEGAS range of machines
is a thorough cleaning and inspection, with the frequency depending on
the usage and the operating environment.
 WARNING  Disconnect the PEGAS from the mains supply voltage before
disassembling.
2. Special maintenance is not necessary for the control unit parts in the
Welder. If these parts are damaged for any reason, replacement is
recommended.
CAUTION  Do not blow air into the welder during cleaning. Blowing air into
the welder can cause metal particles to interfere with sensitive electronic
components and cause damage to the welder.
3. To clean the welder, disconnect it from the mains supply voltage then open
the enclosure and use a vacuum cleaner to remove any accumulated dirt
and dust. The welder should also be wiped clean. If necessary, solvents
that are recommended for cleaning electrical apparatus may be used.
4. Troubleshooting and repairing of PEGAS welding equipment should only
be carried out only by suitably qualified or competent person.
5. A ‘competent person’ must be a person who has acquired through training,
qualification or experience, or a combination of them, the knowledge and
skills enabling that person to safely carry out a risk assessment and repairs
to the electrical equipment in question.
6. The person carrying out the servicing needs and repairs must know what
to look at, what to look for and what to do.
10. STATEMENT OF WARRANTY
. In accordance with the warranty periods stated below, ALFA IN guarantees
the proposed product to be free from defects in material or workmanship
when operated in accordance with the written instructions as defined in
this operating manual.
2. ALFA IN welding products are manufactured for use by commercial and
industrial users and trained personnel with experience in the use and
maintenance of electrical welding and cutting equipment.
3. ALFA IN will repair or replace, at its discretion, any warranted parts or
components that fail due to defects in material or workmanship within the
warranty period. The warranty period begins on the date of sale to the end
user.
4. If warranty is being sought, please contact your ALFA IN product supplier
for the warranty repair procedure.
5. ALFA IN warranty will not apply to:
a. Equipment that has been modified by any other party other than
ALFA IN’s own service personnel or with prior written consent
obtained from ALFA IN Service Department.
b. Equipment that has been used beyond the specifications established
in the operating manual.

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c. Installation not in accordance with the installation/operating manual.
d. Any product that has been subjected to abuse, misuse, negligence
or accident.
e. Failure to clean and maintain (including lack of lubrication,
maintenance and protection), the machine as set forth in the
operating, installation or service manual.
6. Within this operating manual are details regarding the maintenance
necessary to ensure trouble free operation.
NOTE  Warranty repairs must be performed by either an ALFA IN Service
Centre, an ALFA IN distributor or an Authorised Service Agent approved by the
company ALFA IN.
7. As a warranty list serves proof of purchase (invoice) on which is the serial
number of the machine.
11. DISPOSAL
Only for EU countries. Do not dispose of electric tools together with
household waste material.
In accordance with European Council Directive 2002/96/EC on
electrical and electronic equipment waste and its implementation in accordance
with national law, electric tools that have reached the end of their service life
must be collected separately and returned to an environmentally compatible
recycling facility.