Handleiding
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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.
The following leak detection methods are deemed acceptable for all refrigerant sys-
tems.
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-cali-
bration.(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 refriger-
ant 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
Clause Removal and evacuation.
compressors or fans.
Leak detection methods
Leak detection fluids are suitable for use with most refrigerants but the use of deter-
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Specialist’s Manual
remove refrigerant;
purge the circuit with inert gas (optional for A2L);
evacuate (optional for A2L);
purge with inert gas (optional for A2L);
open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. For
appliances containing flammable refrigerants other than A2L refrigerants, the
system shall be purged with oxygen-free nitrogen to render the appliance safe for
flammable refrigerants. This process may need to be repeated several times. Com-
pressed air or oxygen shall not be used for purging refrigerant systems.
gents containing chlorine shall be avoided as the chlorine may react with the refrig-
erant and corrode the copper pipe-work.
Detection of flammable refrigerants
Removal and evacuation
When breaking into the refrigerant circuit to make repairs - or for any other purpose
- conventional procedures shall be used. However, for flammable refrigerants it is
important that best practice is followed since flammability is a consideration. The
following procedure shall be adhered to:
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Productinformatie
| Merk | Gree |
| Model | GWA12MZ |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 2717 MB |
