6
Safety Precautions
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.
WARNING
This appliance is
fi
lled with R32
(mild
fl
ammable refrigerant)
.
If the refrigerant is leaked and exposed
to an external ignition source, there is a
risk of fi re.
Indoor unit and outdoor unit
The appliance shall be installed, and/or
operated in a room with fl oor area larger
than
A
min
(m²) and keep away from ignition
sources, such as heat/sparks/open fl ame or
hazardous areas such as gas appliances, gas
cooking, reticulated gas supply systems or
electric cooking appliances, etc. (Refer to Table
A of Installation instructions table for
A
min
(m²))
Be aware that refrigerant may not contain an
odour, highly recommended to ensure suitable
fl ammable refrigerant gas detectors are
present, operating and able to warn of a leak.
Keep any required ventilation openings clear of
obstruction.
Do not pierce or burn as the appliance is
pressurized. Do not expose the appliance
to heat, fl ame, sparks, or other sources of
ignition. Else it may explode and cause injury
or death.
Precaution for using R32 refrigerant
The basic installation work procedures are the same as
conventional refrigerant (R410A, R22) models.
Since the working pressure is higher than that
of refrigerant R22 models, some of the piping
and installation and service tools are special.
Especially, when replacing a refrigerant R22
model with a new refrigerant R32 model,
always replace the conventional piping and
fl are nuts with the R32 and R410A piping and
fl are nuts on the outdoor unit side.
For R32 and R410A, the same fl are nut on the
outdoor unit side and pipe can be used.
The mixing of diff erent refrigerants within
a system is prohibited. Models that use
refrigerant R32 and R410A have a diff erent
charging port thread diameter to prevent
erroneous charging with refrigerant R22 and
for safety.
Therefore, check beforehand. [The charging
port thread diameter for R32 and R410A is 1/2
inch.]
Must always ensure that foreign matter (oil,
water, etc.) does not enter the piping. Also,
when storing the piping, securely seal the
opening by pinching, taping, etc. (Handling of
R32 is similar to R410A.)
• Operation, maintenance, repairing and
refrigerant recovery should be carried
out by trained and certifi ed personnel in
the use of fl ammable refrigerants and as
recommended by the manufacturer. Any
personnel conducting an operation, servicing
or maintenance on a system or associated
parts of the equipment should be trained and
certifi ed.
• Any part of refrigerating circuit (evaporators,
air coolers, AHU, condensers or liquid
receivers) or piping should not be located in
the proximity of heat sources, open fl ames,
operating gas appliance or an operating
electric heater.
• The user/owner or their authorised
representative shall regularly check the
alarms, mechanical ventilation and detectors,
at least once a year, where as required by
national regulations, to ensure their correct
functioning.
