Hotpoint KELON HISENSE - KELO Mode d'emploi télécharger pdf (Page 25)

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SAFETY INSTRUCTIONS

them.

8. Repair to intrinsically safe components

Do not apply any permanent inductive or capacitance loads to the circuit without

ensuring that this will not exceed the permissible voltage and current permitted for the

equipment in use. Intrinsically safe components are the only types that can be worked on

whilelive in the presence of a ammable atmosphere. The test apparatus shall be at the

correct rating. Replace components onlywith parts specied by the manufacturer. Other

parts may result in the ignition of refrigerant atmosphere from a leak.

9. Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp

edges or any other adverse environmental eects.The check shall also take into account the

eects of aging or continual vibration from sources such as compressors or fans.

10.Detection of ammable 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 ame)

shall not be used.

11.Leak detection methods

The following leak detection methods are deemed acceptable for systems containing

ammable refrigerants:

- Electronic leak detectors shall be used to detect ammable 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 conrmed.

- Leak detection uids are 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.

- If a leak is suspected, all naked ames 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 o valves) in a part of the

system remote from the leak.

- Oxygen free nitrogen (OFN) shall then be purged through the system both before and

during the brazing process.

12.Removal and evacuation

- When breaking into the refrigerant circuit to make repairs - or for any other purpose

conventional procedures shall be used. However, it is important that best practice is

followed since ammability is a consideration.

The following procedure shall be adhered to:

- Remove refrigerant;

- Purge the circuit with inert gas;

- Evacuate;

- Purge again with inert gas;

- Open the circuit by cutting or brazing.

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Hotpoint KELON HISENSE - KELO Mode d'emploi Page 25

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