AEG AXP26V578HW User Manual download pdf (Page 21)

21

ENGLISH

achieved by breaking the vacuum in the

system with OFN and continuing 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 OFN

charge is used, the system shall be

vented down to atmospheric pressure to

enable work to take place. This operation

is absolutely vital if brazing operations on

the pipework are to take place.

Ensure that the outlet for the vacuum

pump is not close to any ignition sources

and there is ventilation available.

In addition to conventional charging

procedures, the following requirements

shall be followed.

Charging procedures

•

Ensure that contamination of dierent

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

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.

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.

Decommissioning

1.

Become familiar with the equipment

and its operation.

2.

Isolate system electrically.

3.

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.

4.

Pump down refrigerant system,

if possible.

5.

If a vacuum is not possible, make

a manifold so that refrigerant can

be removed from various parts of

the system.

6.

Make sure that cylinder is situated

on the scales before recovery takes

place.

7.

Start the recovery machine and

operate in accordance with

manufacturer's instructions.

8.

Do not overll cylinders. (No more

than 80% volume liquid charge).

9.

Do not exceed the maximum working

pressure of the cylinder, even

temporarily.

10.

When the cylinders have been lled

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 o.

11.

Recovered refrigerant shall not be

charged into another refrigeration

system unless it has been cleaned

and checked.

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 ammable refrigerant.

Labelling

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