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Safety Precautions

2-3. 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

ammable atmospheres.

• Ensure that the leak detection equipment

being used is suitable for use with

ammable

refrigerants, i.e. non sparking, adequately
sealed or intrinsically safe.

• In case of leakage/spillage happened,

immediately ventilate area and stay upwind
and away from spill/release.

• In case of leakage/spillage happened, do

notify persons down wind of the leaking/
spill, isolate immediate hazard area and keep
unauthorised personnel out.

2-4. Presence of

re extinguisher

• If any hot work is to be conducted on the

refrigerating equipment or any associated
parts, appropriate

re extinguishing

equipment shall be available at hand.

• Have a dry powder or CO

re extinguisher

adjacent to the charging area.

2-5. No ignition sources

• No person carrying out work in relation to a

refrigerating system which involves exposing
any pipe work that contains or has contained

ammable refrigerant shall use any sources

of ignition in such a manner that it may lead to
the risk of

re or explosion. He/She must not

be smoking when carrying out such work.

• All possible ignition sources, including

cigarette smoking, should be kept suf

ciently

far away from the site of installation,
repairing, removing and disposal, during
which

ammable 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.

2-6. 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.

2-7. Checks to the refrigerating equipment

• Where electrical components are being

changed, they shall be

t for the purpose and

to the correct speci

cation.

• At all times the manufacturer’s maintenance

and service guidelines shall be followed.

• If in doubt consult the manufacturer’s

technical department for assistance.

• The following checks shall be applied to

installations using

ammable refrigerants.

- The actual refrigerant charge is in

accordance with the room size within
which the refrigerant containing parts are
installed.

- The ventilation machinery and outlets

are operating adequately and are not
obstructed.

- If an indirect refrigerating circuit is being

used, the secondary circuit shall be
checked for the presence of refrigerant.

- Marking to the equipment continues to be

visible and legible. Markings and signs that
are illegible shall be corrected.

- Refrigerating pipe or components are

installed in a position where they are
unlikely to be exposed to any substance
which may corrode refrigerant containing
components, unless the components
are constructed of materials which are
inherently resistant to being corroded or
are properly protected against being so
corroded.

2-8. Checks to electrical devices

• Repair and maintenance to electrical

components shall include initial safety checks
and component inspection procedures.

• Initial safety checks shall include but not limit

to:-

- That capacitors are discharged: this

shall be done in a safe manner to avoid
possibility of sparking.

- That there no live electrical components

and wiring are exposed while charging,
recovering or purging the system.

- That there is continuity of earth bonding.

• At all times the manufacturer’s maintenance

and service guidelines shall be followed.