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9. All sources of combustion (even a lit cigarette) should be kept away from the
place in which all operations during which the flammabl refrigerant may be
released in the surrounding space must be carried out.
10. Make sure the area is adequately ventilated before intervening inside the
system; a continuous degree of ventilation must be present.
11. DO NOT use means different from those recommended by the manufacturer in
order to speed up the defrosting process or for cleaning.
12. Before any operation, always check that:
• the condensers are unloaded.
The operation must be carried out safely to avoid the risk of producing sparks;
• there are no live electrical components and that the cables are not exposed
while loading, recovering or bleeding the system;
• there is continuity in the ground connection.
13. All electrical power supplies must be disconnected from the appliance on which
you are working.
If it is absolutely necessary that the appliance has electrical power supply, it is
necessary to place a leak detector permanently operational in the most critical
point.
14. Make sure the seals and sealing materials have not deteriorated.
Possible development of flammabl atmospheres.
15. Do not apply any net inductive or capacity load to the circuit without making sure
that this operation won't make you exceed the voltage and current permitted
for the appliance in use.
The appliance for the test must have correct nominal values.
15a The only components on which you can operate in flammabl atmosphere are
those intrinsically safe.
The test device must be set with the correct conditions. The components must
be replaced ONLY with parts of the manufacturer. Danger of loss of refrigerant
in the atmosphere, risk of explosion.
16. Periodically check that the cables are not subject to wear, corrosion, excessive
pressure, vibrations, sharp edges or any other hostile environmental situation.
17. When intervening inside the refrigerating circuit to carry out repairs or for any
other reason, the conventional procedures must be followed:
• remove the refrigerant;
• bleed the circuit with an inert gas;
• evacuate;
• bleed again with an inert gas;
• open the circuit by cutting or by means of brazing.
18. The load of refrigerant must be stored in the specifi custody cylinders.
The system must "cleaned" with OFN to make the unit safe.
It may be necessary to repeat this process several times.
DO NOT use compressed air or oxygen for this operation.
18a.Make sure that, while recharging the system THERE IS no contamination of
the various elements. The pipes or conducts MUST be as short as possible to
minimize the content of refrigerant inside them.
19. The cylinders must be kept in vertical position.
Only use cylinders suitable for collection of refrigerants.
The cylinders must be complete of a pressure-relief valve and switch off valves
in good conditions.
A set of calibrated weighing scales must also be available.
20. The pipes must be equipped with couplings for disconnection and must NOT
present leaks.
Before using the collection machine, check that it underwent correct
maintenance and that the possible associated electric components are sealed,
to prevent switching on in case of leak of refrigerant.
EN - 6
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