Toyotomi SONZAI Series User Manual page 66

DEHUMIDIFIER
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 cylinder is situated on the scales before recovery takes
place.
g. Start the recovery machine and operate in accordance with manufacturer's
instructions.
h. Do not overfi ll 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 fi lled 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.
LABELING
Equipment shall be labelled stating that it has been de-commissioned and
emptied of refrigerant. The label shall be dated and signed. For appliances
containing fl ammable refrigerants, ensure that there are labels on the
equipment stating the equipment contains fl ammable refrigerant.
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 are available. All cylinders
to be used are designated for the recovered refrigerant and labelled for that
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