Olimpia splendid Unico Air 20 SF Mode D'emploi Et D'entretien page 56

2. All personnel in charge of maintenance and people which work in the
surrounding area must be instructed on the type work they are going to
carry out.
3. The zone MUST be checked with a specific refrigerating liquids detector
before and during work, so that the technician is aware of potentially
flammable atmospheres. Make sure the detection device of the leaks is
suitable for use with flammable refrigerants, then that it does not produce
sparks and that is adequately sealed or intrinsically safe.
4. The leaks electronic detectors may need calibration.
If necessary, calibrate them in a zone free of refrigerant.
5. Make sure the detector is not a potential source of combustion and that it
is suitable for the refrigerant used. The device for detection must be set
at a percentage of the refrigerant LFL and must be calibrated for the used
refrigerant; the appropriate percentage of gas (maximum 25 %) must be
confirmed.
6. If the presence of a leak is suspected, all open flames must be removed.
If a fluid leak which requires brazing is encountered, all refrigerant must be
collected from the system or insulated (by means of shut off valves) in a
part of the system away from the leak. Then, bleed nitrogen without oxygen
(OFN) through the system both before and after the brazing process.
7. In case it is necessary to carry out a hot work on the appliance, IT IS
NECESSARY to have a powder or CO
8. To carry out a work which includes exposition of pipes which contain or
contained a flammable refrigerant, DO NOT use sources of combustion.
Risk of fire or explosion!
9. All sources of combustion (even a lit cigarette) should be kept away from
the place in which all operations during which the flammable 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.
EN - 8
fire extinguisher available.
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