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RT-SVX096A-EN
Important: Do Not use compressed air or oxygen for
purging refrigerant systems.
For appliances containing flammable refrigerants, purge
refrigerants 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. Repeat this process until
there is no refrigerant within the system. When the final
oxygen-free nitrogen charge is used, vent down the system
to atmospheric pressure to enable working conditions.
Important: Confirm that the outlet for the vacuum pump is
not close to any potential ignition sources and
that there is proper ventilation.
Confirm that different refrigerants are not contaminated
when using charging equipment.
Hoses or lines must be as short as possible to minimize the
amount of refrigerant they contain.
Keep cylinders upright and verify that the refrigeration
system is grounded prior to charging the system with
refrigerant.
Label the system when charging is complete (if it is not
already labeled). Do Not overfill the refrigeration system.
Before recharging the system, pressure-test with
appropriate purging gas. Leak-test the system when
charging is complete and before commissioning. Carry a
follow up leak test before leaving the site.
Important:
• Before carrying out this procedure, it is
essential that the technician is completely
familiar with the equipment and all its
detail.
• It is recommended that all refrigerants are
recovered safely.
• Prior to the task being carried out, secure
an oil and refrigerant sample in case
analysis is required prior to re-use of
reclaimed refrigerant.
• Electric power must be available before
the task is commenced.
1. Familiarize with the equipment and its operation.
2. Isolate system electrically.
3. Before attempting the procedure verify:
• Mechanical handling equipment is available, if required,
for handling refrigerant cylinders.
• All personal protective equipment is available and
being used correctly.
• Recovery process is supervised at all times by a
competent person.
• Recovery equipment and cylinders conform to the
appropriate standards.
4. Pump down refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold so that
refrigerant can be removed from various parts of the
system.
6. Verify that the cylinder is situated on the scales before
recovery takes place.
7. Start the recovery machine and operate it in
accordance with the manufacturer's instructions.
8. Do not overfill cylinders. (Not more than 80% volume
liquid charge).
9. Do not exceed the maximum working pressure of the
cylinder, even temporarily.
10. When the cylinders have been filled correctly and the
process has been completed, confirm that the cylinders
and the equipment are removed from site promptly and
all isolation valves on the equipment are closed off.
11. Do not charge recovered refrigerant into another
refrigeration system unless it has been cleaned and
checked.
Label the equipment stating that it has been de-
commissioned and refrigerant emptied. The label must be
dated and signed. Verify that there are labels on the
equipment stating the equipment contains flammable
refrigerant.
When removing refrigerant from a system, either for
servicing or decommissioning, it is recommended that all
refrigerants are removed safely.
When transferring refrigerant into cylinders, confirm the
following:
• Only appropriate refrigerant recovery cylinders are
employed.
• Correct number of cylinders for holding the total system
charge is available.
• All cylinders to be used are designated for the
recovered refrigerant and labelled for that refrigerant
(for example special cylinders for the recovery of
refrigerant).
• Cylinders are complete with pressure-relief valve and
associated shut-off valves are in good working
conditions.
• Empty recovery cylinders are evacuated and, if
possible, cooled before recovery occurs.
The recovery equipment must be in good working
conditions with a set of instructions concerning the
equipment that is at hand and must be suitable for the
recovery of the flammable refrigerant. Consult the
manufacturer for any questions. In addition, a set of
calibrated weighing scales must be available and in good
working conditions. Hoses must be complete with leak-free
disconnect couplings and in good condition.
Process the recovered refrigerant according to local
legislation in the correct recovery cylinder, arrange the
relevant waste transfer note. Do Not mix refrigerants in
recovery units and especially in cylinders.
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