VEVOR VDPYCA-50M Installations- Und Bedienungsanleitung Seite 7

damage to the equipment inside the package will not cause a leak of the
REFRIGERANT CHARGE.
The maximum number of pieces of equipment permitted to be stored together will be
determined by local regulations.
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.
The following leak detection methods are deemed acceptable for all refrigerant systems.
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 the copper pipe-work.
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.
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:
safely remove refrigerant following local and national regulations;
1.
evacuate;
2.
purge the circuit with inert gas (optional for A2L);
3.
evacuate (optional for A2L);
4.
continuously flush or purge with inert gas when using flame to open circuit; and
5.
open the circuit.
6.
The refrigerant charge shall be recovered into the correct recovery cylinders if venting is
not allowed by local and national codes. For appliances containing flammable
refrigerants, the system shall be purged with oxygen-free nitrogen to render the
appliance safe for flammable refrigerants. This process might need to be repeated
several times. Compressed air or oxygen shall not be used for purging refrigerant
systems.
For appliances containing flammable refrigerants, refrigerants purging shall be achieved
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