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Warnings (for using R290 refrigerant only)
•That there no live electrical components and wiring are exposed
while charging, recovering or purging the system;
•That there is continuity of earth bonding.
7. Repairs to sealed components
1) 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. If it isabsolutely necessary to have an
electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical
point to warn of a potentially hazardous situation.
2) 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
C
some types of leak detection equipment. Intrinsically safe
components do not have to be isolated prior to working
on them.
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