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• 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 circuits shall be checked
for the presence of refrigerant; marking to the equipment continues to be visible and
legible.
• marking and signs that are illegible shall be corrected;
• refrigeration 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 materiais which are inherently resistant to being
• corroded or are suitably protected against being so corroded.
9. Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and
component inspection procedures. lf a fault exists that could compromise safety, then no
electrical supply shall be connected to the circuit until it is satisfactorily dealt with. lf the fault
cannot be corrected immediately but it is necessary to continue operation, and adequate
temporary solution shall be used. This shall be reported to the owner of the equipment so all
parties are advised.
lnitial safety checks shall include:
• that capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparking
• that there no live electrical components and wiring are exposed while charging, recovering
or purging the system;
• that there is continuity of earth bonding.
10. Repairs to sealed components
1 0.1 During repairs to sealed components, ali electrical supplies shall be disconnected from the
equipment being worked upon prior to any remova! of sealed covers, etc. lf it is necessary
to have an electrical supply to equipment during servicing, then a permanently operating
form of leak detection shall be located at the most criticai point to warn of a potentially
hazardous situation.
1 0.2 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 levei of protection is affected.
This shall include damage to cables, excessive number of connections, terminais not made
to original specification, damage to seals, incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materiais 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. lntrinsically safe components do not have to be isolated prior to working on them.
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