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REQUIREMENTS FOR OPERATION
Requirements for Operation, Service and Installation of Appliances Using
Flammable Refrigerants
Detection of flammable refrigerants
• Electronic leak detectors may be used to detect refrigerant leaks but, in the case of FLAMMABLE
REFRIGERANTS
chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
NOTE: Examples of leak detection fluids are:
- bubble method,
- fluorescent method agents.
according to the manual.
Removal and evacuation
– When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures
shall be used. However, for FLAMMABLE REFRIGERANTS it is important that best practice be followed, since
– A non-sparking, adequately sealed or intrinsically safe vacuum pump shall be used.
available.
and national codes. For appliances containing FLAMMABLE REFRIGERANTS, the system shall be purged
with oxygen-free nitrogen to render the appliance safe for FLAMMABLE REFRIGERANTS
need to be repeated several times.
– Compressed air or oxygen shall not be used for purging refrigerant systems.
Charging procedures
• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or
lines shall be as short as possible to minimise the amount of refrigerant contained in them.
• Cylinders shall be kept in an appropriate position according to the instructions.
• Ensure that the REFRIGERATING SYSTEM is earthed prior to charging the system with refrigerant.
• Extreme care shall be taken not to overfill the REFRIGERATING SYSTEM.
be leak-tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out
prior to leaving the site.
49-5001038 Rev. 1
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