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EN
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conducting any work involving heat. Ventilation should continue during the
full duration of the work and should safely disperse any released refrigerant
and preferably expel it externally into the atmosphere.
• Checks to the refrigeration equipment: When electrical components are
being repaired or replaced, they should be fitted for their intended purpose
and to the correct specification. At all times, the manufacturer’s
maintenance and service guidelines should be followed. If in doubt, consult
the manufacturer’s technical department for assistance. The following
checks should be applied to installations using flammable refrigerants: the
charge size is in accordance with the room size within which the refrigerant
containing parts are installed; the ventilation machinery and outlets are
operating adequately and are not obstructed; if an indirect refrigerating
circuit is being used, the secondary circuit should be checked for the
presence of refrigerant; markings on the equipment should continue to be
visible and legible, and markings and signs that are illegible should be
adequately corrected; refrigeration pipe or components should be installed
in a position where they are unlikely to be exposed to any substance which
could corrode refrigerant containing components, unless the components
are constructed of materials which are inherently resistant to being
corroded or are suitably protected against being so corroded.
• Checks to electrical devices: Repair and maintenance to electrical
components should include initial safety checks and component inspection
procedures. If a problem exists that could compromise safety, no electrical
supply should be connected to the circuit until the problem is satisfactorily
dealt with. If the problem cannot be corrected immediately but it is
necessary to continue operation, an adequate temporary solution should be
used. This should be reported to the owner of the equipment so that all
parties are aware of the circumstances. Initial safety checks shall include:
checking that capacitors are discharged (this should be done in a safe
manner to avoid possibility of sparking); checking that there are no live
electrical components or wiring exposed while charging, recovering, or
purging the system; checking that there is continuity of grounding.
• Every maintenance, service, and repair procedure that could impact safety
should only be carried out by competent persons according to Annex HH
(competence of service personnel as indicated by training carried out by
national training organizations accredited to teach relevant national
competency standards. The achieved competence should be documented by
a certificate).
• All personnel engaging in work on the refrigeration system should bear a
valid certification awarded by an authorized organization and the
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