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Idiomas disponibles
Idiomas disponibles
If it is absolutely necessary to have a power supply for the equipment during servicing, some form of
continuously operating leak detection should be located at the most critical point to warn of a potentially
hazardous situation.
Particular attention must be paid to the following points to ensure that when working on electrical
components, the enclosure is not modified in such a way that the level of protection is affected. This
includes damage to cables, excessive number of connections, terminals not conforming to the original
specifications, damage to seals, incorrect installation of cable glands, etc.
Make sure that the device is mounted securely.
Make sure that seals or sealing materials have not degraded to the extent that they are no longer used
to prevent the ingress of flammable atmospheres. Spare parts must comply with the manufacturer's
specifications.
NOTE: The use of silicone sealant may impair the effectiveness of some types of leak detection
equipment. It is not necessary to isolate intrinsically safe components before working on them.
10. Repair of intrinsically safe components
Do not apply any permanent inductive or capacitive load to the circuit without making sure that it will
not exceed the permitted voltage and current for the equipment being used.
Intrinsic components are the only types on which you can work under voltage in the presence of a
flammable atmosphere.
Replace components only with parts specified by the manufacturer. Other parts may cause the
refrigerant to ignite in the atmosphere due to leakage.
11. Wiring
Check that the wiring will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges
or any other adverse environmental effects. The check also takes into account the effects of aging or
continuous vibration from sources such as compressors or fans.
12. Detection of flammable refrigerants
Under no circumstances should potential ignition sources be used in the investigation or detection of
refrigerant leaks. A halide torch (or any other detector using an open flame) must not be used.
13. Leak detection methods
The following leak detection methods are acceptable for systems containing flammable refrigerant.
Electronic leak detectors shall be used to detect flammable refrigerants, but sensitivity may not be
adequate or may require recalibration (detection equipment shall be calibrated in a refrigerant-free
area). Ensure that the detector is not a potential source of ignition and that it is suitable for the
refrigerant used.
Leak detection liquids are suitable for most refrigerants, but the use of detergents containing chlorine
should be avoided, as chlorine can react with the refrigerant and corrode copper pipes.
If a leak is suspected, all open flames must be removed/extinguished.
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