Bedienungsanleitung Argo Dry Cube (Seite 14 von 14) (Englisch)

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- Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or

lines shall be as short as possible to minimise the amount of refrigerant contained in them.

- Cylinders shall be kept upright.

- Ensure that the refrigeration 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 refrigeration 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.

Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its

detail. lt 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 reclaimed refrigerant. lt is essential

that electrical power is available before the task is commenced.

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. lf 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 overfill 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 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.

k. Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

Labelling

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 flammable refrigerants, ensure that there are labels on the equipment

stating the equipment contains flammable 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. AII cylinders to be used are

designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of

refrigerant). Cylinders shall be complete with pressure-relief valve and assodated shut-off valves in good working order.

Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at

hand and shall be suitable for the recovery of all appropriate refrigerants including, when applicable, flammable

refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be

complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is

in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to

prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant

waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.

lf compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to

make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out

prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to

accelerate this process. When oil is drained from a system, it shall be carried out safely.

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