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•
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.
•
Label the system when charging is complete (if not
already).
•
Extreme care shall be taken not to overfill the
refrigerating system.
Prior to recharging the system, it shall be pressure-tested
with the appropriate purging gas. 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.
Prior to refrigerant charging, open all appropriate valves,
including solenoid and electronic expansion valves (EXVs).
Use control settings, where available. When not available,
manually open all electronically controlled valves using
acceptable service procedures.
Decommissioning
Before carrying out the decommissioning procedure, it is
essential that the trained service personnel is completely
familiar with the equipment and all its details. 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 recovered refrigerant. It is
essential that electrical power is available before the task is
commenced.
1. Become familiar with the equipment and its operation.
2. Isolate system electrically.
3.
Before attempting the procedure, ensure that:
ARTC-SVX008A-EN
a. Mechanical handling equipment is available, if
required, for handling refrigerant cylinders.
b. All personal protective equipment is available
and being used correctly.
c. The recovery process is supervised at all times
by a competent person.
d. 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. Make sure that cylinder is situated on the scales before
recovery takes place.
7. Start the recovery machine and operate in accordance
with instructions.
8. Do not overfill cylinders (no 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 completed, make sure that the cylinders and
the equipment are removed from site promptly and all
isolation valves on the equipment are closed off.
11. Recovered refrigerant shall not be charged into another
refrigerating system unless it has been cleaned and
checked. When equipment has been decommissioned,
attach a signed label which includes the date of
decommissioning.
12. When equipment has been decommissioned, attach a
signed label which includes the date of
decommissioning.
A2L Work Procedures
17
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