Bedienungsanleitung Argo Nikko (Seite 17 von 21) (Englisch)

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39V 05/23

Aptitude requirement for maintenance man (repairs. should be done only be specialists).

• Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid

certicate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants

safely in accordance with an industry recognised assessment specifìcation.

• Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair

requiring the assistance of other skilled personnel shall be carried out under the supevision of the person competent

in the use of ammable refrigerants.

Safety preparation work

The maximum refrigerant charge amount is shown on the following table a

(Note: Please refer to the nameplate for the charging quantity of R290).

Table a - Maximum charge (kg)

Security checks

Prior to beginning work on systems containing ammable refrigerants, safety checks are necessary to ensure that

the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall be complied

with prior to conducting work on the system.

• Work procedure

Work shall be undertaken under a controlled procedure so as to minimise the risk of a ammable gas or vapour

being present while the work is being performed.

• General work area

AII maintenance staff and others working in the local area shall be instructed on the nature of work being carried

out. Work in conned spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure

that the conditions within the area have been made safe by control of ammable material.

• Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the

technician is aware of potentially toxic or ammable atmospheres. Ensure that the leak detection equipment being

used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

• Presence of re extinguisher

lf any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate re

extinguishing equipment shall be available to hand. Have a dry powder or CO2 re extinguisher adjacent to the

charging area.

• No ignition sources

No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall

use any sources of ignition in such a manner that it may lead to the risk of re or explosion. AII possible ignition

sources, including cigarette smoking, should be kept sufciently far away from the site of installation, repairing,

removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work

taking place, the area around the equipment is to be surveyed to make sure that there are no ammable hazards

or ignition risks. “No Smoking” signs shall be displayed.

• Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting

any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation

should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

• Checks to the refrigeration equipment

Where electrical components are being changed, they shall be t for the purpose and the correct specication.

At all times the manufacturer’s maintenance and service guidelines shall be followed. lf in doubt, consult the

manufacturer’s technical department for assistance.

SPECIALIST’S MANUAL

Room area (m2) 4 11 15

Maximum charge (kg) <0.152 0.225 0.304

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