Suspension System Installation (Only Item 7913); Electrical Installation; Safety Rules - TECNA 7911 Manuel D'instruction

SUSPENSION SYSTEM INSTALLATION (ONLY ITEM
7913)
Install a suspension system suitable for the work to be carried
out. Hang the spot gun to a balancer. The function of the balancer
is to use the gun without effort. After hanging the spring balancer
and the safety chain to the structure (see instructions enclosed to
the balancer), balancer capacity must be adjusted: allow a light
tendency up to get the best results.
Once completing the balancing check if the entire cable can get
out freely and it is not stopped by an overloaded spring. During
maintenance lock the balancer (for further notice check balancer
operating manual). Last adjustment is to balance the gun
longitudinally. This adjustment is carried out by slackening screw
1 and nut 8 and by shifting the machine according to the working
needs.

ELECTRICAL INSTALLATION

The welders described in this instruction manual have been
designed for being used only for a professional purpose in an
industrial environment and are classified as class A resistance
welding equipment.
WARNING: the class A resistance welding equipment is not
foreseen for being used on low voltage public mains supplying
domestic environments. This may cause radiofrequency
interferences.
Installation must be carried out by specialised personnel only,
aware of all safety rules. As this unit can be supplied for different
power supply versions, before connecting the unit to the power
line, check if the voltage shown on the features plate corresponds
to the one of your power supply.
Art. / Item 7911-7913-7915
Fig. 2
Consult table 5 to determine the capacity of the plug which must
be installed on the supply cable; all use without plug is forbidden.
The supply cables are brown and pale blue, the ground cable is
green/yellow.
It is compulsory to connect the welder to the protection
conductor (earth). Verify that the protection conductor of the
equipment is efficient and corresponds to the law in force.
The cables section to be used according to their length is stated
on the same table. Examples of possible connections are stated
on figure 10; the solution assuring the best safety is that with a
differential magneto-thermal switch. On the contrary, install fuses
of the type stated on table 5.

SAFETY RULES

For a safe welder employ, the installation must be carried out by
qualified personnel only; the welder maintenance must be carefully
carried out by following all the safety instructions stated on the
"MAINTENANCE" paragraph. In particular, notice that the
electrodes maintenance must be carried out with the welder
switched off. The welder must be used in a place fulfilling the
following features:
• In an inner place. The welder has not been designed for being
used in an open place.
• Room temperature included between 0 and 40 °C (If water is
removed, storage is allowed down to 20°C below 0); 1000 m.
maximum altitudes.
• In a well ventilated area, free from dust, steam, and acid
exhalations.
• The working place must be free from inflammable materials
because the working process can produce spatters of melted
and white-hot metal.
If the welder is used to carry out welding processes which can
cause smoke exhalations, a proper aspirator must be installed.
The welder should be operated only by trained personnel; in any
case, users operating the welder must be aware of the possible
risks and must have both read and understood this manual. It is
forbidden to have more people working on the welder at the same
time.
No admittance allowed to the working area to people other than
the operator.
The welder main risk is the squashing of the upper limbs caused
by the moving of the electrodes. For this reason, it is necessary to
pay great attention and to follow all the instructions stated on this
manual. In particular, adjust the working stroke to the minimum
allowed value, and avoid working with the hands nearby the mo-
bile components.
In case of water entering the welder, immediately stop the
electrical supply.
Notice that these types of machines generate strong magnetic
fields attracting metals (metal prosthesis included) and damaging
watches, magnetic cards and magnetic data storage media. Since
these magnetic fields can affect pace-makers, metal prothesis,
hearing aids and all other electrical medical devices, the wearers
must consult their doctor before approaching to the welding area.
The personnel must wear both safety glasses and gloves. Avoid
wearing rings, metal watches and clothes with either metal
accessories or components. When operating heavy working, high
thickness and pieces with a difficult coupling, wear safety shoes
and aprons, and use protection screens to protect the operator
from possible split of melted materials.
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