Friedrich ZoneAire Premier ZHV16DA handleiding

Airco

Friedrich

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Handleiding

Prior to recharging the system, it shall be pressure tested with OFN. 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.

9 DECOMMISSIONING

Before carrying out this procedure, it is essential that the technician 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 reclaimed refrigerant. It is essential that electrical

power is available before the task commences.

a) Become familiar with the equipment and its operation.

b) Isolate the 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 the 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 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.

10 LABELLING

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant.

The label shall be dated and signed.

Ensure that there are labels on the equipment stating the equipment contains flammable

refrigerant.

11 RECOVERY

When removing refrigerants 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 refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete

with pressure relief valve and associated 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 flammable refrigerants. In

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

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