● When changing electrical components, ensure they are fit for purpose and have the
correct specification.
● Follow the below maintenance and service guidelines. If in doubt, contact the
manufacturer's technical department for assistance.
● Charge size must be appropriate for the room size where refrigerant-containing parts
are installed.
● Ventilation machinery and outlets must be functioning properly and not be obstructed.
● If an indirect refrigerating circuit is used, check the secondary circuit for refrigerants.
● Equipment markings should be visible and legible. Illegible markings and signs must
be corrected.
● Refrigeration pipes or components must be installed in a way that minimises exposure
to corrosive substances.
During repairs and maintenance for electrical components, initial safety checks and
inspections must be performed. If there is a fault that could compromise safety, the
electrical supply must not be connected until the issue is resolved. If the fault cannot be
fixed immediately, an adequate temporary solution should be used - the owner of the
equipment must be informed.
Initial safety checks include:
● Refrigeration pipes or components must be installed in a way that minimises exposure
to corrosive substances.
● During repairs and maintenance for electrical components, initial safety checks and
inspections must be performed. If there is a fault that could compromise safety, the
electrical supply must not be connected until the issue is resolved. If the fault cannot
be fixed immediately, an adequate temporary solution should be used - the owner of
the equipment must be informed.
Initial safety checks include:
a) Ensuring capacitors are safely discharged to avoid sparking.
b) Ensuring no live electrical components and wiring are exposed while charging,
recovering or purging the system.
c) Ensuring there is continuity of earth bonding.
Repairs to sealed components:
● When repairing sealed components, all electrical supplies must be disconnected from
the equipment before removing sealed covers, etc. If it is absolutely necessary to
have an electrical supply connected during servicing, then a permanent leak
detection must be located at the most critical point to warn of any hazardous
situations.
● When working on electrical components, ensure the casing is not altered in any way.
This includes damage to cables, an excessive number of connections, terminals not
matching original specifications, damage to seals and incorrect fitting of glands. This
is to ensure the level of protection is not affected. Ensure the apparatus is mounted
securely.
● Ensure the seals or sealing materials have not deteriorated to the point where they no
longer stop flammable gases from getting inside.
● Replacement parts must match the manufacturer's specifications.
NOTE: Using silicon sealant can interfere with some types of leak detection equipment.
Intrinsically safe components do not need to be isolated before maintenance.
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