9 CHECK OPERATION AND TEST OPERATION..........................................................15
1.SAFETY PRECAUTIONS
SYSTEM Air Conditioners
III
VRV
CONTENTS
Installation manual
Please read these “SAFETY PRECAUTIONS” carefully before installing air conditioning unit and be sure to
install it correctly. After completing the installation, make sure that the unit operates properly during the startup operation. After completing installation, conduct a trial operation to check for faults. Inform customers that
they should store this installation manual for future reference.
This air conditioner comes under the term “appliances not accessible to the general public”.
BS unit is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
Meaning of WARNING and CAUTION notices
WARNING .........Failure to follow these instructions properly may result in personal injury or loss of life.
CAUTION ..........Failure to observe these instructions properly may result in property damage or per-
sonal injury, which may be serious depending on the circumstances.
WARNING
• Ask your dealer or qualified personnel to carry out installation work.
Do not attempt to install the air conditioner yourself. Improper installation may result in water leakage,
electric shocks or fire.
• Install the air conditioner in accordance with the instructions in this installation manual.
Improper installation may result in water leakage, electric shocks or fire.
• Consult your local dealer regarding what to do in case of refrigerant leakage.
When the air conditioner is to be installed in a small room, it is necessary to take proper measures so that
the amount of any leaked refrigerant does not exceed the concentration limit in the event of a leakage. Otherwise, this may lead to an accident due to oxygen depletion.
• Be sure to use only the specified accessories and parts for installation work.
Failure to use the specified parts may result in the unit falling, water leakage, electric shocks or fire.
• Install the air conditioner on a foundation strong enough to withstand the weight of the unit.
A foundation of insufficient strength may result in the equipment falling and causing injury.
• Carry out the specified installation work after taking into account earthquakes.
Failure to do so during installation work may result in the unit falling and causing accidents.
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• Make sure that a separate power supply circuit is provided for this unit and that all electrical work is carried
out by qualified personnel according to local laws and regulations and this installation manual.
An insufficient power supply capacity or improper electrical construction may lead to electric shocks or fire.
• Be sure to earth the air conditioner.
Do not earth the unit to a utility pipe, lightning conductor or telephone earth lead. Imperfect earthing may
result in electric shocks or fire.
A high surge current from lightning or other sources may cause damage to the air conditioner.
• Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric shocks or fire.
• Be sure to switch off the unit before touching any electrical parts.
• Make sure that all wiring is secured, the specified wires are used, and that there is no strain on the terminal
connections or wires.
Improper connections or securing of wires may result in abnormal heat build-up or fire.
• When wiring the power supply and connecting the wiring between the indoor and outdoor units, position the
wires so that the EL. COMPO. BOX lid can be securely fastened.
Improper positioning of the EL. COMPO. BOX lid may result in electric shocks, fire or overheating terminals.
• If refrigerant gas leaks during installation, ventilate the area immediately.
Toxic gas may be produced if the refrigerant gas comes into contact with fire.
• After completing installation, check for refrigerant gas leakage.
Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source
of fire, such as a fan heater, stove or cooker.
• Do not directly touch refrigerant that has leaked from refrigerant pipes or other areas, as there is a danger
of frostbite.
CAUTION
• Install the BS units, power cord and connecting wires at least 1 meter away from televisions or radios to pre-
vent picture interference and noise.
(Depending on the incoming signal strength, a distance of 1 meter may not be sufficient to eliminate noise.)
• Remote controller (wireless kit) transmitting distance can be shorter than expected in rooms with electronic
fluorescent lamps (inverter or rapid start types).
Install the BS unit as far away from fluorescent lamps as possible.
• Make sure to provide for adequate measures in order to prevent that the outdoor unit be used as a shelter
by small animals.
Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct
the customer to keep the area around the unit clean.
• Do not install the air conditioner in the following locations:
1.Where there is a high concentration of mineral oil spray or vapour (e.g. a kitchen).
Plastic parts will deteriorate, parts may fall off and water leakage could result.
2.Where corrosive gas, such as sulphurous acid gas, is produced.
Corroding of copper pipes or soldered parts may result in refrigerant leakage.
Electromagnetic radiation may disturb the operation of the control system and result in a malfunction of
the unit.
4.Where flammable gas may leak, where there is carbon fibre or ignitable dust suspensions in the air, or
where volatile flammables such as paint thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
5.Do not use in areas where the air is salty, such as along seacoasts, in factories or other areas with sig-
nificant voltage fluctuations, or in automobiles and watercraft.
Doing so could result in a malfunction.
• The BS unit is not intended for use in a potentially explosive atmosphere.
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CAUTION
The refrigerant R410A requires that strict precautions be observed for keeping the system clean, dry
and tightly sealed.
Clean and dry
Strict measures must be taken to keep impurities (including SUNISO oil and other mineral oils as well as
moisture) out of the system.
Tightly sealed
R410A contains no chlorine, does not destroy the ozone layer and so does not reduce the earth’s protection against harmful ultraviolet radiation. R410A will contribute only slightly to the greenhouse effect
if released into the atmosphere. Therefore, sealing tightness is particularly important in installation.
Carefully read the chapter “REFRIGERANT PIPING WORK” and strictly observe the correct procedures.
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other parts must be done in accordance
with relevant local and national legislation.
2.BEFORE INSTALLATION
2-1CAUTION CONCERNING NEW REFRIGERANT SERIES
• Since design pressure is 4.0 MPa or 40 bar (for R407C units: 3.3 MPa or 33 bar), the thickness of pipes
must be greater than previously. Since R410A is a mixed refrigerant, the required additional refrigerant
must be charged in its liquid state. (If the system is charged with refrigerant in its gaseous state, due to composition change, the system will not function normally.)
The indoor/outdoor unit is designed for R410A use. See the catalogue for indoor/outdoor unit models that
can be connected.
(Normal operation is not possible when connecting units that are originally designed for other refrigerants.)
2-2PRECAUTIONS
• Hold the unit by the Hanging brackets (4 points) when opening the box and moving it, and do not lift it hold-
ing on to any other part especially the refrigerant piping.
• About installation of outdoor and indoor unit, refer to the installation manual provided with the outdoor and
the indoor unit.
This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment.
•
If installed as a household appliance it could cause electromagnetic interference.
2-3ACCESSORIES
Check the following accessories are included with your unit.
NOTE
• Do not throw away any of the accessories until installation is complete.