Hotpoint KELON HISENSE - KELO Mode d'emploi télécharger pdf (Page 26)

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SAFETY INSTRUCTIONS

The refrigerant charge shall be recovered into the correct recovery cylinders.The system

shall be “ushed” with OFN to render the unit safe. This process may need to be repeated

several times. Compressed air or oxygen shall not be used for this task. Flushing shall

be achieved by breaking to ll until the working pressure is achieved, then venting to

atmosphere, and nally pulling down to a vacuum. This process shall be repeated until no

refrigerant is within the system. When the nal charge is used, the system shall be vented

down to atmospheric pressure to enable work. This operation is absolutely vital if brazing

operations, on the pipe-work are to take place. Ensure that the outlet for the vacuum

pump is not close to any ignition sources and there is the vacuum in the system with OFN

and continuing ventilation available.

13.Charging procedures

In addition to conventional charging procedures, the following requirements shall be

followed:

- Ensure that contamination of dierent refrigerants does not occur when using charging

equipment.

- Hoses or lines shall be as short as possible to minimize 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 overll the refrigeration system. 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.

14.Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar

with the equipment and all its detail. 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 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. 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 overll cylinders. (No more than 80 % volume liquid charge).

i. Do not exceed the maximum working pressure of the cylinder, even temporarily.

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Hotpoint KELON HISENSE - KELO Mode d'emploi Page 26

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