Installation; Pneumatic Installation; Cooling Circuit Installation (Only Items 7913-7915) - Tecno-gaz 7911 Manuel D'instruction

INSTALLATION

On receipt of the welder, verify the perfect integrity of the outer
package; communicate to a responsible in charge possible ano-
malies which should be noticed. Possible damages on the outer
package should arise some doubts on the integrity of its content.
Remove the package and visually verify the welder integrity. Check
that the welder is equipped with all the standard components;
immediately inform the manufacturer in case some components
should lack. All the material forming the package must be removed
according to the present environmental protection regulations.

PNEUMATIC INSTALLATION

For a correct compressed air supply to the welder, it is necessary
either a centralised system or a compressor capable of supplying
at least 1500 N litres/h of dry air cooled at 6.5 bar (650kP). The
welder must be supplied by means of the air assembly 74 supplied
with the standard accessories. The welder has been assembled by
using components which do not require lubrication. The insertion
of a lubricator in the circuit causes no problems to the welder;
nevertheless, pay attention to the fact that this brings the emission
of oil mist in the environment.
COOLING CIRCUIT INSTALLATION (ONLY ITEMS 7913-
7915)
For a correct cooling of the welder it is necessary 150 l/h clean
water at a maximum temperature of 30°C. When connecting the
unit to the water line check for dirt or packing scraps in the hoses
and connect the supply to the INLET H
that still cool water immediately reaches the parts of the welder
most subject to heating. The lukewarm water cooling the welder
gets out from the OUTLET H
2
hoses are identified by labels (Fig. 1).
12
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Art. / Item 7911-7913-7915
O hose (G), this to allow
2
O hose (H). The water inlet and outlet
We recommend using water with a maximum hard water of 10 °fH
(French degrees).
Check that the used liquid is clean. Particles suspended in the
cooling liquid may deposit inside the machine reducing or undoing
the cooling capacity and causing serious damages: capacity de-
crease, inadequate cooling, valves and taps obstructions, etc...
For this reason it is always advisable to install a suitable filter on
the machine's supply.
It is possible to carry the cooling circuit system out with both city
supply water and re-circulating water. In the re-circulating water
circuits it is possible to cool the water by means of a water-air heat
exchanger or a refrigerator (chiller). In case of the re-circulating
water circuits, it is advisable to use some antifreeze in the suitable
percentages which, besides protecting the circuit against freezing,
it prevents from scales and improves the thermal exchange. If
the circuit is with city supply or refrigerator and you are working
in presence of high humidity, we suggest avoiding the use of low
temperature water, as this could produce moisture inside the ma-
chine. In presence of hard water it is necessary to install a water
softener at the inlet hose, this to avoid that deposits obstruct or
reduce the water channels in the welder causing damages. If the
machine is operated in a re-circulating water supply, the water
softener must be placed before the supply of the tank containing
the cooling water.
Fig. 1