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Idiomas disponibles
Idiomas disponibles
Intrinsically safe components are the only types that can be
worked on while live in the presence of a flammable atmosphere.
The test apparatus shall be at the correct rating.
Replace components only with parts specified by the
manufacturer. Other parts may result in the ignition of refrigerant
in the atmosphere from a leak.
Cabling
Check that cabling will not be subject to wear, corrosion,
excessive pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account the
effects of ageing or continual vibration from sources such as
compressors or fans.
Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be
used in the searching for or detection of refrigerant leaks. A halide
torch (or any other detector using a naked flame) shall not be
used.
Leak detection methods
The following leak detection methods are deemed acceptable for
systems containing flammable refrigerants.
Electronic leak detectors shall be used to detect flammable
refrigerants, but the sensitivity may not be adequate, or may need
recalibration. (Detection equipment shall be calibrated in a
refrigerant free area.) Ensure that the detector is not a potential
source of ignition and is suitable for the refrigerant used. Leak
detection equipment shall be set at a percentage of the lower
flammability limit (LFL) of the refrigerant and shall be calibrated to
the refrigerant employed and the appropriate percentage of gas
(25 % maximum) is confirmed.
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