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INTRODUCTION
CAREFULLY
READ
INSTALLING AND OPERATING THE WELDER.
The purpose of this instruction manual and of the enclosed
documents is to transfer the necessary information for using the
product in a proper and safe way. It includes pieces of information
relevant to safety, installation, use, maintenance and disposal of
the product.
This manual is addressed to the factory responsible in charge
who must release it to the personnel in charge of the welder
installation, use and maintenance. He/she must check that the
information given in this manual and in the enclosed documents
have been read and understood before operating the machine.
The manual must be stored in a well-known place, easy to reach,
and must be looked up each time even little doubts should arise.
The welders marked with suffix P are equipped with the pulse
functioning mode, which can be excluded anyway. The pulse
stands for the power supply at regular intervals. It is possible to
carry 13 pulses out maximum (5 complete cycles) at an interval of
2 pause cycles. The pulses duration is adjustable through the
knob 66 (Picture 3).
These welders must be installed in industrial environments for
professional use only and are classified as class A resistance
welding equipment. This product is foreseen for being used neither
in domestic environment nor on low voltage public supply mains
supplying domestic buildings. This may cause radiofrequency
interferences.
All modifications, even slight ones, are forbidden because they
could compromise the machine's safety and they should invalidate
the welder EC certification.
The welder has been designed for resistance welding of both
ferrous and non ferrous materials (stainless steel, brass). The
welder must not be used for other applications.
TECNA S.p.A is not responsible for any damage to both people,
animals, things and to the welder itself caused by either a wrong
use or the lack or the superficial observance of the safety warnings
stated on this manual, nor it is responsible for damages coming
from even slight tampering or from the use of not-suitable spare
parts, or of spare parts other than the original ones.
Only for EU countries:
In accordance with European Directive 2002/96/EC for
waste electrical and electronic equipment (RAEE), the
presence of this symbol indicates that the product shall
not be disposed of as urban waste. A separate collection
must be arranged for.
It is the user's responsibility to dispose of this product correctly.
They should contact their local authority or retailer.
The unlawful disposal of these wastes is punished with sanctions.
The correct disposal helps to optimize the recovery, the recycling
and the reclaim of any materials and also reduces potential nega-
tive consequences for the environment and human health.
STANDARD ACCESSORIES
The welder is supplied equipped with:
N° 1 Allen keys set, 5-4-3-2 mm.
N° 1 additional handle (only for items 7911-7915)
N° 1 electrode sharpener Ø 12 (only items 7911)
N° 1 compressed air group complete with cutting device.
N° 1 air supply hose Ø 6, length 4 m supplied without plug.
N° 1 pair of arms item 7401 L=125 mm (only items 7911).
N° 1 instruction manual.
Art. / Item 7911-7913-7915
THIS
MANUAL
BEFORE
TECHNICAL FEATURES
Spot welder type
Synchronous timer with SCR
Time adjustment
Current adjustment 40÷100%
Cooling
Mains supply 50 Hz *
Nominal power at 50%
Max. welding power
Max. short circuit current
with arms L=
Thermal current at 100%
Secondary no load voltage
Insulation class
Cooling water quantity
Max. water pressure
Pneumatic operation
Air consumption
for 1000
Max. force on electrodes
with arms L=
Standard arms throat depth L
Arms gap
Max. electrodes stroke
with arms L=
Weight with arms 125 mm
Weight with arms 150 mm
Weight with arms 500 mm
Aerial noise
Level of vibrations
Measurement conditions:
welding time
welding current
working rating
* Different voltages and frequency available on request
REFERENCE SYMBOLS
COLD The COLD parameter is used in the pulse operating
mode and indicates the time elapsing between one welding
pulse and the next one.
IMPULSE NUMBERThe IMPULSE NUMBER parameter
indicates the number of impulses used to carry out the
welding process. When this parameter is set to 0, the pulse
operation is disabled. The length of each impulse corresponds to
the time set in the WELD TIME or WELD TIME 2 parameter. When
working, the relevant led shows that this function is activated.
WELD TIME The WELD TIME parameter indicates the
current flow duration. It will be carried out with the power
value indicated in parameter CURRENT. When the pulse operation
is on, this parameter signals the duration of each pulse.
CURRENTThe value expressed in CURRENT indicates the
welding operating power.
7911
7913
•
•
cycles
2 65
2 65
•
•
Air
Water
V
400
400
kVA
2,5
6
kVA
18
18
kA
8,2
8,2
mm
125
150
A
660
1520
V
2,7
2,7
F
F
l/h
-
100
bar
-
-
bar
6,5
6,5
3
1
1
Nm
daN
125
120
mm
125
150
mm
125
150
mm
94
94
mm
40
40
mm
125
150
kg
12,8
-
kg
-
16
kg
14,8
19
dB(A)
< 70
< 70
2
< 2,5
< 2,5
m/s
cycles
4
6
kA
4,1
6,1
welds/min
11
15
7915
•
2÷65
•
Water
400
6
18
8,2
150
1520
2,7
F
100
2,5
6,5
1
120
150
150
94
40
150
-
13
15
< 70
< 2,5
6
6,1
15
11
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