Saneo JHS-A19-07KR2/E Mode D'emploi page 50

- verification that no live electrical components or wiring are exposed during charging,
recovery or purging of the system;
- verification that there is continuity of the equipotential bonding to earth.
- Repairs of hermetic components
During repairs of hermetic components, all power supplies must be disconnected from the
equipment undergoing operations before any removal of hermetic covers, etc. If it is absolutely
necessary to supply the equipment with electricity during service operations, a permanently
operating leak detection device must be located at the most critical point to warn in case of a
potentially dangerous situation.
Particular attention should be paid to the following to ensure that when working on electrical
components, the enclosure is not altered in a way that alters the level of protection. This should
include damage to cables, excessive number of connections, terminals that do not meet the
original specification, damage to seals, incorrect adjustment of cable glands, etc.
Make sure that the unit is mounted safely.
Ensure that the joints or sealing materials have not degraded to the point of no longer preventing
the penetration of flammable atmospheres. Spare parts must comply with the manufacturer's
specifications,
NOTE: The use of a silicone sealant can inhibit the effectiveness of certain types of leak detection
equipment. Intrinsically safe components do not have to be isolated before undergoing a
procedure.
- Repair of intrinsically safe components
Do not apply inductive loads or permanent capacities to the circuit without ensuring that it will
not exceed the permissible voltage and current allowed for the equipment used.
Intrinsically safe components are the only types that can be worked on when they are energized
in a flammable atmosphere. The test equipment must have the correct rated characteristics.
Replace components only with parts specified by the manufacturer. Other parts can cause the
refrigerant to ignite in the atmosphere as a result of a leak.
- Cabling
Check that the wiring will not be subjected to wear, corrosion, excessive pressure, vibration,
sharp edges or any other adverse environmental effects. The verification must also take into
account the effects of aging or continuous vibration from sources such as compressors or fans.
- Detection of flammable refrigerants
Under no circumstances should potential ignition sources be used to search for or detect
refrigerant leaks. A haloid lamp (or any other detector using an open flame) must not be used.