Insignia NS-AC06PWH1 User Manual page 8

13 Charging procedures
In addition to conventional charging procedures, the following requirements shall be followed. Ensure that
contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short
as possible to minimize the amount of refrigerant contained in them.
Cylinders shall be kept upright.
Ensure that the refrigeration system is grounded prior to charging the system with refrigerant.
Label the system when charging is complete (if not already).
Extreme care shall be taken not to overfill the refrigeration system. Prior to recharging the system it shall be pressure
tested with OFN. The system shall 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.
14 Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all
its detail. It is recommended good practice that all refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use
of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the
procedure ensure that: Mechanical handling equipment is available, if required, for handling refrigerant cylinders; All
personal protective equipment is available and being used correctly; The recovery process is supervised at all times by
a competent person; Recovery equipment and cylinders conform to the appropriate standards. d) Pump down
refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from
various parts of the system. f) Make sure that the cylinder is situated on the scales before recovery takes place. g) Start
the recovery machine and operate in accordance with the manufacturer's instructions. h) Do not overfill cylinders. (No
more than 80% volume liquid charge). i) Do not exceed the maximum working pressure of the cylinder, even
temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders
and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k)
Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
15 Labeling
Equipment shall be labeled stating that it has been decommissioned and emptied of refrigerant. The label shall be
dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable
refrigerant.
16 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 the recovered refrigerant and labeled 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 flammable refrigerants. 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. Before using the recovery machine, check that it is in satisfactory working
order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in
the event of a refrigerant release. Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the
refrigerant supplier 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 evacuation process shall be carried out prior to returning the compressor to the
suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is
drained from a system, it shall be carried out safely.
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