Aktobis AG WDH-520EB Snelstarthandleiding - Pagina 5

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15. Filling process
In addition to conventional filling procedures, the following requirements must be followed:
- Ensure that no contamination of the various refrigerants occurs when filling the equipment. Hoses or cables must be as short
as possible to minimize the amount of refrigerant they contain.
- Cylinders must remain upright.
- Ensure that the refrigeration system is earthed before charging the system with refrigerant.
- Mark the system when charging is complete (if not already done).
- Extreme care must be taken not to overfill the cooling system.
Before refilling the system, the pressure must be tested with oxygen-free nitrogen. The system must be tested for leaks at the
end of filling but before commissioning. A check leakage test must be carried out before leaving the site.
16. Decommissioning
Before carrying out this procedure, it is necessary that the technician is fully familiar with the equipment and its details. It is a
recommended standard that all refrigerants are safely reconditioned. An oil and refrigerant sample must be taken prior to the
task to be carried out in case analysis is required prior to reuse of the reclaimed refrigerant. It is necessary that electrical power
is available before the task is started.
a) Familiarize yourself with the equipment and its operation.
b) Disconnect the system electrically.
c) Before carrying out the operation, make sure
that mechanical handling equipment is available; if necessary also for handling refrigerant cylinders.
handling of refrigerant cylinders;
that personal protective equipment is available and properly worn;
that the reprocessing operation is supervised at all times by a competent person;
that the reprocessing equipment and cylinders comply with the applicable standards.
d) Pump down the refrigerant system if possible.
e) If a vacuum is not possible, establish a manifold so that the refrigerant can be removed from the various parts of the system.
f) Make sure that the cylinder is straight and stable.
g) Start the conditioning system and operate it according to the manufacturer's instructions.
h) Do not overfill the cylinders (no more than 80 % liquid filling capacity)
i) Do not exceed the maximum working pressure of the cylinder, not even temporarily.
j) When the cylinders have been properly charged and the process is complete, ensure that the cylinders and equipment are
immediately removed from site and that all shut-off valves on the equipment are closed.
k) Reconditioned refrigerant must not be charged into other refrigeration systems unless it has been cleaned and tested.
17. Labeling
The equipment must be marked to show that it has been taken out of service and that the refrigerant has been drained. The
marking must be dated and signed. Ensure that there are markings on the equipment stating that the equipment contains
flammable refrigerant.
18. Reconditioning
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended standard practice that all
refrigerant is safely removed. When transferring refrigerant to cylinders, ensure that only suitable refrigerant reprocessing
cylinders are used. Ensure that the correct number of cylinders are available to hold the total amount of refrigerant. All cylinders
used must be suitable and marked for the reconditioned refrigerant (i.e. special cylinders for reconditioning refrigerant). The
cylinders must have a pressure relief valve and a connected shut-off valve and be in good working condition. Empty
reprocessing cylinders must be emptied of air and, if possible, cooled before reprocessing.
The reprocessing plant must be in good working order with appropriate instructions concerning the equipment and must be
suitable for the reprocessing of flammable refrigerants. In addition, a set of calibrated scales in good working order must be
available. Hoses must be complete with leak-free and proper disconnect couplings. Before using the reconditioner, check that it
is in good working order, that it has been properly maintained and that all associated electrical components are sealed to
prevent ignition in the event of a refrigerant leak. If in doubt, contact the manufacturer.
The reconditioned refrigerant must be returned to the refrigerant supplier in the correct reconditioning cylinder and the
appropriate proof of disposal must be arranged. Do not mix refrigerants in remanufacturing units and especially not in cylinders.
If a compressor or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to ensure
that no flammable refrigerant remains in the lubricant. The evacuation process must be carried out before returning the
compressor to the supplier. Only electrical heating of the compressor housing may be used to accelerate this process. When
draining oil from a system, this must be done in a safe manner.
Aktobis AG, Borsigstr. 20, D-63110 Rodgau / Germany
www.AKTOBIS.de