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8. Loading procedure
In addition to conventional loading procedures, the following requirements must be
followed.
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Ensure that no contamination of different refrigerants occurs when using the
loading equipment. Hoses or lines should be kept as short as possible to minimise
the amount of refrigerant contained in them.
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Cylinders must be kept in an upright position.
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Ensure that the refrigeration system is grounded before loading the system with
refrigerant.
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Tag the system when charging is complete (if not already).
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Extreme care must be taken to avoid overfilling the cooling system.
Before reloading, the system must be pressure-tested with oxygen-free nitrogen. The
system shall be leak-tested upon completion of loading, but prior to commissioning.
A subsequent leakage test must be carried out before leaving the site.
9. Commissioning
Before performing this procedure, it is essential that the technician is thoroughly
familiar with the equipment and all its details. It is recommended good practice
that all refrigerants are safely recovered. Before the task is carried out, a sample of oil
and refrigerant should be taken in case an analysis is required before the recovered
coolant is reused. It is essential for there to be power before starting with the task.
A. It is important to get familiar with the equipment and its operation.
B. Electrically isolate the system.
C. Before attempting the procedure, ensure that
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the mechanical-handling equipment is available, if required, for the handling of
refrigerant cylinders;
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all personal protective equipment is available and correctly used;
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the recovery process is supervised at all times by a competent person;
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cylinders and recovery equipment conform to appropriate standards.
D. Pump the cooling system, if possible.
E. If vacuum is not possible, make a manifold so that refrigerant can be removed
from various parts of the system.
Ensure that the cylinder is positioned on the scale before recovery takes place.
F.
G. Switch on the recovery machine and operate it according to the manufacturer's
instructions.
H. Do not overfill cylinders (no more than 80% of the liquid charge by volume).
I.
Do not exceed the maximum working pressure of the cylinder, even temporarily.
J.
When the cylinders have been correctly filled and the process is complete, ensure
that the cylinders and equipment are promptly removed from the site and that all
equipment isolation valves are closed.
ENGLISH
73
CLIMA P9 3 IN 1
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