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SAFETY PRECAUTIONS
• Ensure that all Local, National and International regulations are satisfied.
• Read these “SAFETY PRECAUTIONS” carefully before Installation.
• The precautions described below include important items regarding safety.
Observe them without fail.
• After the installation work, perform a test operation to check for any problem.
Follow the Owner’s Manual to explain to the customer how to use and maintain the unit.
• Ask the customer to keep the Installation Manual together with the Owner’s Manual.
• The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.
WARNING
• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
Inappropriate installation may result in water leakage, electric shock or fire.
• Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or
explosion of the product or an injury to your body.
• Be sure to connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.
• Turn off the main power supply switch or breaker before attempting any electrical work.
Make sure all power switches are off. Failure to do so may cause electric shock.
Use an exclusive power circuit for the air conditioner. Use the rated voltage.
• Connect the connecting cable correctly.
If the connecting cable is incorrect, electric parts may be damaged.
• When moving the air conditioner for installation to another place, be very careful not to allow the specified
refrigerant (R410A) to become mixed with any other gaseous body into the refrigeration circuit.
If air or any other gas mixes with the refrigerant, the gas pressure in the refrigeration circuit will become abnormally
high and it may result in the pipe bursting or personal injuries.
• Do not modify this unit by removing any of the safety guards or by by-passing any of the safety interlock
switches.
• After unpacking the unit, examine for possible damage.
• Do not install in a place that can increase the vibration of the unit.
• To avoid personal injury (with sharp edges), be careful when handling parts.
• Perform installation work properly according to the Installation Manual.
Incorrect installation may result in water leakage, electric shock or fire.
• When the air conditioner indoor unit is installed in a small room, provide appropriate measures to ensure
that in the event of a refrigerant leak the room does not exceed the critical level.
• Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.
• Wear heavy gloves during the installation work to avoid injury.
• Install the air conditioner securely in a location where the base can sustain the weight of the unit
adequately.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the unit falling.
• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may be
generated.
• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual.
Make sure the air conditioner uses an exclusive power supply.
An insufficient power supply capacity or inappropriate installation may cause fire.
• Use only the specified wiring during the unit installation. Ensure that all terminals are securely fixed, so
preventing any external forces having a negative effect on the terminals.
• When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the
air conditioner as refrigerant leakage is considered as the cause.
In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.
The refrigerant used in the air conditioner is harmless.
Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in
the room catches fire, it may generate toxic gas.
When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been
completely repaired.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
• Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible gas.
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
• Install the refrigerant pipe securely during the installation work before operating the air conditioner.
If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the
refrigeration cycle is overpressurized, which may cause a burst or injury.
• When carrying out the pump-down work, shut down the compressor before disconnecting the refrigerant
pipe.
Disconnecting the refrigerant pipe with the service valve left open and with the compressor still operating will cause
air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly
resulting in rupturing, injury, etc.
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY
OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working
pressure of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the
new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that
water, dust, former refrigerant, or refrigeration machine oil does not enter the new type refrigerant R410A air
conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main
unit and installation tools are different from those of the conventional refrigerant units. Accordingly, special tools are
required for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high
pressure fittings made for R410A only, so that water and/or dust does not enter.
To Disconnect the Appliance from the Main Power Supply
• This appliance must be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm.
• A 40 A installation fuse (all fuse types can be used) must be used for the power supply line of this conditioner.
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