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—09—
IMPORTANT SAFETY INSTRUCTIONS
8.Repair to intrinsically safe components
● Do not apply any permanent inductive or capacitance loads to
ensuring that this will not exceed the permissible voltage and
for the equipment in use.
●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 ofrefrigerant in the atmosphere from a leak.
9.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.
10.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.
11.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 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.
-Leak detection equipment shall be set at a percentage ofthe LFL ofthe refrigerant
and shall be calibrated to the refrigerant employed and the appropriate percentage of
gas(25 %maximum)is confirmed.
the circuit without
current permitted
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