LG THERMA V HN0613T Installation Manual page 14

SAFETY INSTRUCTIONS
14
Repair
• 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
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 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 the copper pipe-work.
NOTE
Examples of leak detection fluids are
- Bubble method
- Fluorescent method agents
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. Removal of refrigerant shall be according to
removal and evacuation procedure.