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possibility of sparking;
– that no live electrical components and wiring are exposed while charging, re-
covering or purging the system;
– that there is continuity of earth bonding.
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electrical components, the casing is not altered in such a way that the level of
protection is affected. This shall include damage to cables, excessive number of
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Ensure that the apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded to the point that they
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pheres. Replacement parts shall be in accordance with the manufacturer's speci-
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or capacitance loads to the circuit without ensuring that this will not exceed the
permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live
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correct rating.
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may result in the ignition of refrigerant in the atmosphere from a leak.
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pressure, vibration, sharp edges or any other adverse environmental effects. The
check shall also take into account the effects of aging or continual vibration from
sources such as compressors or fans.
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When breaking into the refrigerant circuit to make repairs – or for any other pur-
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DQWV LW LV LPSRUWDQW WKDW EHVW SUDFWLFH EH IROORZHG VLQFH ÀDPPDELOLW\ LV D FRQVLG-
eration. The following procedure shall be adhered to:
a) safely remove refrigerant following local and national regulations;
b) purge the circuit with inert gas;
c) evacuate (optional for A2L);
d) purge with inert gas (optional for A2L);
e) open the circuit by cutting or brazing.
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technician is completely familiar with the equipment and all its detail. It is recom-
mended good practice that all refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant sample shall be taken in
case analysis is required prior to re-use of recovered refrigerant. It is essential
that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure, ensure that:
– mechanical handling equipment is available, if required, for handling refrigerant
cylinders;
OM-B142 ZU A5 EN.indd 7
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2022/7/22 10:59:13
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