in the presence of a flammable atmosphere. T
he
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 aging 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. T
he
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
re-calibration. (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. L
eak
detection
equipment
shall
be
set
at
a
percentage
of
the if of
the
refrigerant and shall be calibrated to the refrigerant employed
and the appropriate percentage of gas (25 % maximum) is
confirmed. Leak detection fluids are suitable for use with most
refrigerants but the use of detergents containing chlorine shall be
avoided as the chlorine may react with the refrigerant and
corrode the copper pipe-work. If a leak is suspected, all naked
flames shall be removed/ extinguished. If a leakage of refrigerant
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