cecotec BIGDRY 10000 EXPERT CONNECTED Manual De Instrucciones página 65

- Do not apply any permanent inductive or capacitive load to the circuit without ensuring
that it will not exceed the permissible voltage and current rating for the equipment in use.
- Intrinsically safe components are the only type of components that can be worked on
in a flammable atmosphere. The test instrumentation must have the correct assigned
features.
- Replace components only with parts specified by the manufacturer. Other parts can
ignite the refrigerant in the atmosphere from a leak.
4. Wiring
Verify that the wiring is not subject to wear, corrosion, excessive pressure, vibration, sharp
edges, or any other environmental effects. The verification should also take into account the
effects of ageing or continuous vibration from sources such as compressors or fans.
5. Detection of flammable refrigerants
Under no circumstances should potential ignition sources be used in the search for or
detection of refrigerant leaks. Do not use a halide lamp or any other detector using a naked
flame.
6. Leak-detection methods
- The following leak-detection methods are considered acceptable for systems containing
flammable refrigerants.
- Electronic leak detectors should be used to detect flammable refrigerants, but the
sensitivity may not be adequate, or may need recalibration (the detection equipment
should be calibrated in a refrigerant-free area). Ensure that the detector is not a potential
ignition source and that it is suitable for the refrigerant used. The leak-detection
equipment must be set to a percentage of the lower flammability limit of the refrigerant
and calibrated for the refrigerant used with the appropriate percentage of gas (maximum
25%) confirmed.
- Leak-detection fluids are suitable for use with most refrigerants, but the use of
detergents containing chlorine must be avoided, as chlorine can react with the
refrigerant and corrode copper pipes.
- If a leak is suspected, all naked flames must be eliminated/extinguished.
- If a refrigerant leak is found and requires brazing, all refrigerants must be recovered from
the system, or isolated (by means of shut-off valves) in a part of the system far away
from the leak. Oxygen-free nitrogen must then be purged through the system both before
and during the brazing process.
7. Removal and evacuation
When intervening in the cooling circuit for repairs or any other purpose, conventional
procedures must be followed. However, it is important that best practices are followed, as
flammability is a matter to be taken seriously. The following procedure is to be followed:
BIGDRY 10000 EXPERT CONNECTED
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