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Idiomas disponibles
Idiomas disponibles
Important Safety Information
READ AND FOLLOW ALL SAFETY INSTRUCTIONS
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 while live in the presence of a flammable
atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts
specified by the manufacturer. Other parts may result in the ignition of refrigerant in the 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 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.
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 or pipe-work.
•
If a leak is suspected, all naked flames shall be removed or 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 and evacuation shall be in according to the removal and
evacuation section.
11. 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 the best practice is followed since flammability
is a consideration. The following procedures shall be adhered to:
•
safely remove refrigerant following local and national regulations;
•
purge the circuit with inert gas;
•
evacuate (optional for A2L);
•
purge again with inert gas (optional for A2L);
•
open the circuit by cutting or brazing.
SAVE THESE INSTRUCTIONS!
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