Predator S20PLUS Gebrauchsanweisung Seite 38

prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct reco-
very cylinder,and the relevant Waste Transfer Note arranged. Do not mix refrigerants in
recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been eva-
cuated to an acceptable level to make certain that flammable refrigerant does not remain
within the lubricant. The evacuation process shall be carried out prior to returning the com-
pressor to the suppliers. Only electric heating to the compressor body shall be employed
to accelerate this process.When oil is drained from a system,it shall be carried out safely.
Competence of service personnel
General
Special training additional to usual refrigerating equipment repair procedures is required
when equipment with flammable refrigerants is affected.
In many countries, this training is carried out by national training organisations that are
accredited to teach the relevant national competency standards that may be set in legisla-
tion.
The achieved competence should be documented by a certificate.
Training
The training should include the substance of the following:
Information about the explosion potential of flammable refrigerants to show that flam-
mables may be dangerous when handled without care.
Information about potential ignition sources, especially those that are not obvious, such as
lighters, light switches, vacuum cleaners, electric heaters.
Information about the different safety concepts:
Unventilated – (see Clause GG.2) Safety of the appliance does not depend on ventilation of
the housing. Switching off the appliance or opening of the housing has no significant effect
on the safety. Nevertheless, it is possible that leaking refrigerant may accumulate inside the
enclosure and flammable atmosphere will be released when the enclosure is opened.
Ventilated enclosure – (see Clause GG.4) Safety of the appliance depends on ventilation of
the housing. Switching off the appliance or opening of the enclosure has a significant effect
on the safety. Care should be taken to ensure a sufficient ventilation before.
Ventilated room – (see Clause GG.5) Safety of the appliance depends on the ventilation of
the room. Switching off the appliance or opening of the housing has no significant effect on
the safety. The ventilation of the room shall not be switched off during repair procedures.
Information about the concept of sealed components and sealed enclosures according to
IEC 60079-15:2010.
Information about the correct working procedures:
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