7
5
The maximum refrigerant charge amount: 75g.
5
An unventilated area where the appliance using flammable
refrigerants is installed shall be so constructed that should
any refrigerant leak, it will not stagnate so as to create a fire or
explosion hazard.
5
The appliance shall be stored so as to prevent mechanical damage
from occurring.
5
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.
5
The following leak detection methods are deemed acceptable for
systems containing flammable refrigerants.
5
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 of the LFL of the
refrigerant and shall be calibrated to the refrigerant employed and
the appropriate percentage of gas (25 % maximum) is confirmed.
5
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.
5
lf a leak is suspected, all naked flames shall
be removed/extinguished.
5
lf a leakage of refrigerant is found which requires brazing, all of
the refrigerant shall be recovered from the system, or isolated (by
means of shut off valves) in a part of the system remote from the
leak. Oxygen free nitrogen (OFN) shall then be purged through the
system both before and during the brazing process.
5
Before carrying out this procedure, it is essential that the technician
is completely familiar with the equipment and all its detail. It is
recommended good practice that all refrigerants are recovered
safely. Prior to the task being carried out, an oil and refrigerant
NEW12808 BLYSS FALLON / 12 L Dehumidifier V7.indd 7
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