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IM2024
– 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 materials 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. 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:
-those 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. Maintenance of sealed components
It is important to ensure that all power sources are disconnected from the operating
equipment during the maintenance of sealed components, before removing the sealing
covers, etc.
In case of necessity to provide power to the equipment during maintenance, it is
important to provide a permanent leak detection system at the most critical point in order
to warn of a potentially dangerous situation.
Pay particular attention to ensure the impossibility to change/damage/deform the
housing when working with electrical components in such a way as to affect the
protection level, namely: damage to cables, excessive number of connections, non-
compliance of terminals with the original specification, damage to seals, improper
installation of oil seals, etc.
Make sure that the device is installed in a secure manner.
Make sure that the seals or sealing materials are not worn to such an extent that they
no longer prevent the passage of flammable substances. Spare parts shall comply with
the manufacturer's specifications.
NOTE: The use of silicone sealant can reduce the effectiveness of some types of leak
detection equipment. Intrinsically safe components do not have to be isolated before
working on them.
11. Maintenance of intrinsically safe components
Before applying permanent inductive or capacitive loads to the circuit, ensure that they
do not exceed the permissible voltage and current allowed for the equipment.
Structurally intrinsically safe components shall be the only type of equipment that can be
operated under voltage in case of a flammable atmosphere. The test equipment shall be
of the appropriate class.
The components shall only be replaced with the parts specified by the manufacturer.
Other parts may ignite the cooling agent in the atmosphere due to its leakage.
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