Toshiba RAV-HM301SDTY-E Owner's Manual page 12

OM_D0X7303301-01_EN_Print.book Page 11 Friday, May 19, 2023 6:48 PM
• 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.
12. Cabling
• Check that cabling will not be subject to wear, corrosion, excessive
pressure, vibration, sharp edges or any other adverse
environmental effects.
• Check shall also take into account the effects of aging or continual
vibration from sources such as compressors or fans.
13. 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.
• Electronic leak detectors may be used to detect refrigerant leaks
but, in the case of flammable refrigerants, 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.
• Leak detection fluids are also 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 containing
chlorine.
• If a leak is suspected, all naked flames shall be removed/
extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the
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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.
14. Leak detection methods
• Electronic leak detectors shall be used to detect flammable
refrigerants leak, 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.
• 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 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.
15. Removal and evacuation
• When breaking into the refrigerant circuit to make repairs or for any
other purpose, Conventional procedures shall be used. However, it
is important that best practice is followed since flammability is a
consideration.
The following procedure shall be adhered to:
22-EN