7
•
Marking to the equipment continues to be visible and legible. Markings and signs
that are illegible shall be corrected.
•
Refrigerating pipe or components are installed in a position where they are
unlikely to be exposed to any substance which may 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.
(8) Repair and maintenance to electrical components shall include initial safety
checks and component inspection procedures. If a fault exists that could
compromise safety, then no electrical supply shall be connected to the circuit until
it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is
necessary to continue operation, an adequate temporary solution shall be used.
This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include:
•
That capacitors are discharged. This shall be done in a safe manner to avoid
possibility of sparking.
•
That no live electrical components and wiring are exposed while charging,
recovering or purging the system.
•
That there is continuity of earth bonding.
•
During repairs to sealed components, all electrical supplies shall be disconnected
from the equipment being worked upon prior to any removal of sealed covers, etc.
•
Particular attention shall be paid to the following to ensure that by working on
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
connections, terminals not made to original specification, damage to seals, incorrect
fitting of glands, etc.
•
Ensure that apparatus is mounted securely.
•
Ensure that seals or sealing materials have not degraded such that they no longer
serve the purpose of preventing the ingress of flammable atmospheres.
•
Replacement parts shall be in accordance with the manufacturer’s specifications.
NOTE:
The use of silicon sealant may inhibit the effectiveness of some types of leak
detection equipment. Intrinsically safe components do not have to be isolated prior
to working on them.
•
Do not apply any permanent inductive 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 in
the presence of a flammable atmosphere.
•
The test apparatus shall be at the correct rating.
•
Replace components only with parts specified by the manufacturer. Unspecified parts
by manufacturer may result ignition of refrigerant in the atmosphere from a leak.
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