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A12C
Detection of flammable refrigerants
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 aging or continual vibration from sources such as
compressors or fans.
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 LFL of the refrigerant
and shall be
calibrated to the refrigerant employed and the appropriate
percentage of gas (25 % maximum
Leak detection fluids are suitable for use with most refrigerants
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)
is confirmed.
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