VEVOR BBD-230L Originalanleitung Seite 17

- 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:
- Electronic leak detectors may be used to detect refrigerant leaks but, in
the case of FLAMMABLE REFRIGERANTS, the sensitivity might not be
adequate, or might need recalibration. (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
can 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. Removal of
refrigerant shall be according to instruction of removal and evacuation.
• 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 be followed, since flammability
is a consideration. The following procedure shall be adhered to:
1) safely remove refrigerant following local and national regulations;
2) purge the circuit with inert gas;
3) evacuate (optional for A2L);
4) purge with inert gas (optional for A2L);
5) open the circuit by cutting or brazing.
• The refrigerant charge shall be recovered into the correct recovery
cylinders if venting is not allowed by local and national codes. For
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