HOMCOM 823-052V70 Manual page 16

a) Get to know the equipment and how it works.
b) Turn off the electricity to the system.
c) Before starting, make sure you have the necessary equipment for handling
refrigerant cylinders, personal protective equipment and supervision from a
qualified person. Also, ensure the recovery equipment and cylinders meet the
appropriate standards.
d) If possible, remove the refrigerant from the system.
e) If vacuuming is not possible, create a manifold to remove the refrigerant from
different parts of the system.
f) Place the cylinder on a scale before starting the recovery process.
g) Start the recovery machine and follow the instructions.
h) Do not fill the cylinders with more than 80% of liquid refrigerant.
i) Never exceed the maximum working pressure of the cylinder.
j) After filling the cylinders correctly and completing the process, promptly remove
the cylinders and equipment from the site and close off any isolation valves.
k) Before charging it into another refrigeration system, clean and check the
recovered refrigerant.
17. Labelling
Ensure equipment is labelled as decommissioned and emptied of refrigerant. The
label should have a date and signature. For equipment containing flammable
refrigerants, there should be labels indicating that it contains flammable
refrigerant.
18. Recovery
When removing refrigerant for servicing or decommissioning, take suitable safety
measures.
Only use appropriate refrigerant recovery cylinders when transferring refrigerant.
Ensure you have enough cylinders to hold the total system charge. The cylinders
should be designated for recovered refrigerant and labelled accordingly. These
cylinders should have a pressure-relief valve and working shut-off valves. Empty
cylinders should be evacuated and cooled before recovery. The recovery must be in
good working order and suitable for all appropriate refrigerants, including
flammable ones if applicable. Ensure there are calibrated weighing scales
available and in good condition. Before using the recovery machine, check that it is
working properly and has been maintained well. Also, ensure all electrical
components are sealed to prevent ignition in case of a refrigerant release. Contact
the manufacturer if unsure.
Recovered refrigerant must be returned to the refrigerant supplier in the
appropriate recovery cylinders. Make sure the relevant waste transfer note is
arranged. Do not mix different refrigerants in recovery units or cylinders.
If compressors or compressor oils need removing, ensure they are properly
evacuated to clear any remaining flammable refrigerant from the lubricant. This
evacuation process must be done before returning the compressor to the suppliers.
Only use electrical heating on the compressor body to speed up this process. Drain
oil from the system in a safe manner.
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