Cebora GRV 12 Manual De Instrucciones página 5

The cooling unit is supplied without coolant.
To fill the tank, unscrew the cap (B) and pour in approxi-
mately 5 litres of coolant.
Connect the welding torch and all of the connecting
hoses, set the switch (A) to the ON position so that the
coolant begins to circulate, then 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 (C).
The coolant should be of the type used for cooling cir-
cuits in the automobile sector. This is obtained by mixing
water (preferably deionized) with a glycol-based antifree-
ze, 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 -26°C
50% antifreeze when the ambient temperature is -38°C
Important: This mixture not only maintains the fluidity of
the coolant at extremely low temperatures, but also pre-
vents the formation of chalky deposits from hard water
which would compromise the life of the system, in parti-
cular of the pump. For this reason, you are advised to use
antifreeze even during the summer.
Warning: Prolonged dry operation of the pump may com-
promise its functionality and life.
To protect the torch, a pressure switch which controls
delivery pressure has been fitted at the pump outfeed.
Should the pressure drop due to a lack of fluid or becau-
se the pump is jammed, the flow meter stops the power
source through the connector (E). This problem is indica-
ted by a specific warning lamp that lights on the power
source itself.
Remember to shut off the machine when you have fini-
shed welding.
4 MOTOR PUMP TECHNICAL SPECIFICATIONS
Frequency = 50 Hz
Input power = 200 W
Input current = 1 A
Motor revolutions = 2850 rpm
Max. capacity = 7 liters/min.
Max. head = 3 Bar
Frequency = 60 Hz
Input power = 270 W
Input current = 1.2 A
Motor revolutions = 3300 rpm
Max. capacity = 8,5 liters/min.
Max. head. = 4 Bar
U1 = 230V
5 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.
5.1 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 con-
nected 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 opera-
tion. 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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