Elettro CU 44V Manual De Instrucciones página 5

3.1 Setting up
Place the apparatus as indicated in picture 4. Take care
not to obstruct the flow of air through the cooling slots.
3.2 Installation
The unit must be installed by qualified personnel. All
connections effected must comply with the current
standards and with the law on safety at work.
Before connecting up the mains lead, ensure that the
hoses are already connected, the power supply voltage
corresponds to that indicated on the technical data
plate, and the earth plug is efficient.
The cooling unit is supplied without coolant.
To fill the tank, unscrew the cap A and pour in
approximately 4 litres of coolant.
Connect the welding torch and all of the connecting hoses,
set the switch E to the ON position so that the coolant
begins to circulate, than top up the tank to the "max." level.
It is important to keep the tank filled to the "max." level
during use. This ensures improved performance.
You should therefore regularly check the level through slot
B. The coolant should be of the type used for cooling
circuits in the automobile sector. This is obtained by mixing
water (preferably deionized) with a glycol-based antifreeze,
in quantities which depend on the ambient conditions.
To facilitate this operation, follow these indications:
20% antifreeze when the ambient temperature is -9°C,
30% antifreeze when the ambient temperature is -17°C,
40% antifreeze when the ambient temperature is -25°C,
Important: This mixture not only maintains the fluidity of the
coolant at extremely low temperatures, but also prevents
the formation of chalky deposits from hard water which
would compromise the life of the system, in particular of
the pump. For this reason, you are advised to use
antifreeze even during the summer.
Warning! Prolonged dry operation of the pump may
compromise its functionality and life.
To protect the torch, a pressure switch which controls
delivery pressure has been fitted at the pump output. If the
pressure drops due to the absence of coolant or a
Pict. 4
blockage in the pump, the pressure switch (through
connector D causes the generator to stop. This fault is
often indicated by a special light located on the generator.
Remember to switch off the apparatus when you have
finished welding or cutting.
4 MAINTENANCE
Disconnect the mains lead before any internal inspection
of the unit. Regularly remove any dust and extraneous
materials from the inside of the unit, and in particular the
radiator. Check that all of the hose tightening clips are
closed, that the fittings are in perfect condition, and the
coolant is at the correct level.
4.1 Procedures to follow when repairs have been made
After making repairs, ensure that the wiring is arranged in
such a way as to guarantee the insulation of parts
connected to the supply circuit from those connected to the
low tension circuit. Make sure that the wires cannot come
into contact with moving parts, or any parts which heat up
during operation. Replace all clips, as on the original
machine, so that if a lead accidentally breaks or is
disconnected, a contact between the supply circuit and the
low tension circuits is impossible.
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