Manual BEKO BP109C (page 18 of 340) (English, German, Dutch, French, Italian, Portuguese)

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18 / 340 EN Local Air-conditioner / User Manual

6. Leak detecton methods

The following leak detection methods are deemed acceptable

for systems containing flammable refrigerants. Electronic leak

detectors shall be used to detect flammable refrigerants, but

the sensitivity may not be adequate, or may 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 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 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. Oxygen free nitrogen (OFN) shall then be purged through the

system both before and during the brazing process.

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BEKO BP109C Manual

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