Handleiding
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6 IMPORTANT SAFETY INSTRUCTIONS
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 flammability is a consideration. The following procedure shall be adhered to:
- safely remove refrigerant following local and national regulations;
- evacuate;
- purge the circuit with inert gas (optional for A2L);
- evacuate (optional for A2L);
- continuously flush or purge with inert gas when using flame to open circuit; and
- open the circuit.
The refrigerant charge shall be recovered into the correct recovery cylinders if venting is not allowed by
local 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. This process might
need to be repeated several times.Compressed air or oxygen shall not be used for purging refrigerant
systems.
For appliances containing flammable refrigerants, refrigerants purging shall be achieved by breaking
the vacuum in the system with oxygen-free nitrogen and continuing to fill until the working pressure is
achieved, then venting to atmosphere, and finally pulling down to a vacuum (optional for A2L). This
process shall be repeated until no refrigerant is within the system (optional for A2L). When the final
oxygen-free nitrogen charge is used, the system shall be vented down to atmospheric pressure to
enable work to take place.
The outlet for the vacuum pump shall not be close to any potential ignition sources, and ventilation shall
be available.
• Charging procedures
In addition to the existing filling procedure, the following requirements must be observed: When using
the charging device,make sure that it is not contaminated with other refrigerants. The hose or pipe
should be as short as possible to minimize the amount of refrigerant in it.The cylinder should be stored
in the proper location according to the instructions.Make sure the refrigeration system is grounded
before filling the system with refrigerant.When charging is complete, label the system (if it is not already
there).Be careful not to overfill there frigerant. Before recharging the system, a pressure test should be
performed with an appropriate purge gas. After charging is complete and before Dry Run, the system
must be inspected for leaks. Follow-up should be carried out before leaving the site.
• Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended
good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders
are employed. Ensure that the correct number of cylinders for holding the total system charge is
available. All cylinders to be used are designated for there covered refrigerant and labelled for that
refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with
pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders are
evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the
equipment that is at hand and shall be suitable for the recovery of the flammable refrigerant. If in doubt,
the manufacturer should be consulted. In addition, a set of calibrated weighing scales shall be available
and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good
condition.
The recovered refrigerant shall be processed according to local legislation in the correct recovery
cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and
especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an
acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The
compressor body shall not be heated by an open flame or other ignition sources to accelerate this
process. When oil is drained from a system,it shall be carried out safely.
• Checks to the area
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Productinformatie
| Merk | LG |
| Model | KUSAP301A |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 4289 MB |
