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Safety precautions
Prevent water leakage by ensuring drainage
pipe is:
- Connected properly,
- Kept clear of gutters and containers, or
- Not immersed in water
After a long period of use or use with any
combustible equipment, aerate the room
regularly.
After a long period of use, make sure the
installation rack does not deteriorate to
prevent the unit from falling down.
Remote control
Do not use rechargeable (Ni-Cd) batteries. It
may damage the remote control.
To prevent malfunction or damage of the
remote control:
• Remove the batteries if the unit is not going
to be used for a long period of time.
• New batteries of the same type must be
inserted following the polarity stated.
Power supply
Do not disconnect the plug by pulling the cord
to prevent electric shock.
Precaution for using R32 refrigerant
The basic installation work procedures are the same as
conventional refrigerant (R410A, R22) models.
1. Installation (Space)
• Must ensure the installation of pipe-work
shall be kept to a minimum. Avoid use
dented pipe and do not allow acute bending.
• Must ensure that pipe-work shall be
protected from physical damage.
• Must comply with national gas regulations,
state municipal rules and legislation. Notify
relevant authorities in accordance with all
applicable regulations.
• Must ensure mechanical connections be
accessible for maintenance purposes.
• In cases that require mechanical ventilation,
ventilation openings shall be kept clear of
obstruction.
• When disposal of the product, do follow
to the precautions in #12 and comply with
national regulations.
Always contact to local municipal offi ces for
proper handling.
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2. Servicing
2-1. Service personnel
• Any qualifi ed person who is involved with
working on or breaking into a refrigerant
circuit should hold a current valid certifi cate
from an industry-accredited assessment
authority, which authorizes their competence
to handle refrigerants safely in accordance
with an industry recognised assessment
specifi cation.
• 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 supervision of the
person competent in the use of fl ammable
refrigerants.
• Servicing shall be performed only as
recommended by the manufacturer.
2-2. Work
• Prior to beginning work on systems
containing fl ammable refrigerants, safety
checks are necessary to ensure that the risk
of ignition is minimised.
For repair to the refrigerating system, the
precautions in #2-2 to #2-8 must be followed
before conducting work on the system.
• Work shall be undertaken under a controlled
procedure so as to minimize the risk of a
fl ammable gas or vapour being present while
the work is being performed.
• All maintenance staff and others working
in the local area shall be instructed and
supervised on the nature of work being
carried out.
• Avoid working in confi ned spaces.
• Wear appropriate protective equipment,
including respiratory protection, as
conditions warrant.
• Ensure that the conditions within the area
have been made safe by limit of use of any
fl ammable material. Keep all sources of
ignition and hot metal surfaces away.
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 fl ammable atmospheres.
• Ensure that the leak detection equipment
being used is suitable for use with fl 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
unauthorized personnel out.
2-4. Presence of fi re extinguisher
2-8. Checks to electrical devices
• If any hot work is to be conducted on the
• Repair and maintenance to electrical
refrigeration equipment or any associated
components shall include initial safety
parts, appropriate fi re extinguishing
checks and component inspection
equipment shall be available at hand.
procedures.
• Have a dry powder or CO
2
fi re extinguisher
• Initial safety checks shall include but not
adjacent to the charging area.
limit to:-
- That capacitors are discharged: this
2-5. No ignition sources
shall be done in a safe manner to avoid
• No person carrying out work in relation to a
possibility of sparking.
refrigeration system which involves exposing
- That there no live electrical components
any pipe work that contains or has contained
and wiring are exposed while charging,
fl ammable refrigerant shall use any sources
recovering or purging the system.
of ignition in such a manner that it may lead
- That there is continuity of earth bonding.
to the risk of fi re or explosion. He/She must
• At all times the manufacturer's maintenance
not be smoking when carrying out such work.
and service guidelines shall be followed.
• All possible ignition sources, including
• If in doubt consult the manufacturer's
cigarette smoking, should be kept suffi ciently
technical department for assistance.
far away from the site of installation,
• If a fault exists that could compromise safety,
repairing, removing and disposal, during
then no electrical supply shall be connected
which fl ammable refrigerant can possibly be
to the circuit until it is satisfactorily dealt with.
released to the surrounding space.
• If the fault cannot be corrected immediately
• Prior to work taking place, the area around
but it is necessary to continue operation, an
the equipment is to be surveyed to make
adequate temporary solution shall be used.
sure that there are no fl ammable hazards or
• The owner of the equipment must be
ignition risks.
informed or reported so all parties are
• "No Smoking" signs shall be displayed.
advised thereinafter.
2-6. Ventilated area
3. Repairs to sealed components
• Ensure that the area is in the open or that it
• During repairs to sealed components, all
is adequately ventilated before breaking into
electrical supplies shall be disconnected
the system or conducting any hot work.
from the equipment being worked upon prior
• A degree of ventilation shall continue during
to any removal of sealed covers, etc.
the period that the work is carried out.
• If it is absolutely necessary to have an
• The ventilation should safely disperse any
electrical supply to equipment during
released refrigerant and preferably expel it
servicing, then a permanently operating
externally into the atmosphere.
form of leak detection shall be located at the
2-7. Checks to the refrigeration equipment
most critical point to warn of a potentially
• Where electrical components are being
hazardous situation.
changed, they shall be fi t for the purpose
• Particular attention shall be paid to the
and to the correct specifi cation.
following to ensure that by working on
• At all times the manufacturer's maintenance
electrical components, the casing is not
and service guidelines shall be followed.
altered in such a way that the level of
• If in doubt consult the manufacturer's
protection is affected.
technical department for assistance.
This shall include damage to cables,
• The following checks shall be applied to
excessive number of connections, terminals
installations using fl ammable refrigerants.
not made to original specifi cation, damage to
- The charge size is in accordance with
seals, incorrect fi tting of glands, etc.
the room size within which the refrigerant
• Ensure that apparatus is mounted securely.
containing parts are installed.
• Ensure that seals or sealing materials have
- The ventilation machinery and outlets are
not degraded such that they no longer serve
operating adequately and are not obstructed.
the purpose of preventing the ingress of
- If an indirect refrigerating circuit is being
fl ammable atmospheres.
used, the secondary circuit shall be
• Replacement parts shall be in accordance
checked for the presence of refrigerant.
with the manufacturer's specifi cations.
- Marking to the equipment continues to be
NOTE: The use of silicon sealant may inhibit
visible and legible. Markings and signs that
the effectiveness of some types of leak
are illegible shall be corrected.
detection equipment.
- Refrigeration pipe or components are
Intrinsically safe components do not have to
installed in a position where they are unlikely
be isolated prior to working on them.
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.
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A C I 2 P R 0 9 2 0 1
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