Ardesto ACM-12P-R290 - Инструкция по эксплуатации - Страница 113

113

EN

excessive pressure, vibration, sharp edges or any other 

adverse environmental effects. The check shall also take 

into account the effects of aging or continual vibration 

from sources such as compressors or fans.

10. 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.

11. Leak detection methods 

The following leak detection methods are deemed 

acceptable for systems containing flammable refrigerants. 

Electronic leak detectors shall be used to detect flamma-

ble 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 de-

tector 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-

firmed. 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 refrig-

erant and corrode the copper pipe-work. If a leak is sus-

pected, 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.

12. Removal and evacuation 

When breaking into the refrigerant circuit to make repairs 

or for any other purpose conventional procedures shall be