En-1
1. SAFETY PRECAUTIONS
• Be sure to read this manual carefully before installation.
• The warnings and precautions indicated in this manual contain important information
pertaining to your safety. Be sure to observe them.
• Hand this manual, together with the operating manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the
unit.
WARNING
This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.
CAUTION
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
WARNING
Installation of this product must be done by experienced service technicians or
professional installers only in accordance with this manual. Installation by nonprofessional
or improper installation of the product may cause serious accidents such as injury, water
leakage, electric shock, or
fi
re. If the product is installed in disregard of the instructions in
this manual, it will void the manufacturer’s warranty
To avoid getting an electric shock, never touch the electrical components soon after the
power supply has been turned off. After turning off the power, always wait 10 minutes or
more before you touch the electrical components.
Do not turn ON the power until all work has been completed. Turning ON the power
before the work is completed can cause serious accidents such as electric shock or
fi
re.
If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant
comes in contact with a
fl
ame, it produces a toxic gas.
Installation must be performed in accordance with regulations, codes, or standards for
electrical wiring and equipment in each country, region, or the installation place.
Do not use this equipment with air or any other unspeci
fi
ed refrigerant in the refrigerant lines.
Excess pressure can cause a rupture.
During installation, make sure that the refrigerant pipe is attached
fi
rmly before you
run the compressor. Do not operate the compressor under the condition of refrigerant
piping not attached properly with 2-way or 3-way valve open. This may cause abnormal
pressure in the refrigeration cycle that leads to rupture and even injury.
When installing and relocating the air conditioner, do not mix gases other than the
speci
fi
ed refrigerant (R410A) to enter the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause rupture, injury, etc.
To connect the indoor unit and outdoor unit, use air conditioner piping and cables
available locally as standard parts. This manual describes proper connections using
such installation set.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly quali
fi
ed persons in order to avoid a hazard.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or
fi
re by poor connection, insuf
fi
cient insulation or over current.
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
There is not extra refrigerant in the outdoor unit for air purging.
Using the same vacuum pump for different refrigerants may damage the vacuum pump
or the unit.
Use a clean gauge manifold, vacuum pump and charging hose for R410A exclusively.
During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2 way or 3
way valve open. This may cause abnormal pressure in the refrigeration cycle that leads
to rupture and even injury.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.
To avoid danger of suffocation, keep the plastic bag or thin
fi
lm used as the packaging
material away from young children.
Contents
1. SAFETY
PRECAUTIONS
.......................................................................................... 1
2. ABOUT
THIS
PRODUCT........................................................................................... 1
3. SELECTING THE MOUNTING POSITION ............................................................... 2
4. INSTALLATION
DIAGRAM
........................................................................................ 2
5. INSTALLATION
......................................................................................................... 4
6. PUMP
DOWN
............................................................................................................ 5
CAUTION
Read carefully all safety information written in this manual before you install or use the
air conditioner.
This unit must be installed by quali
fi
ed personnel with a capacity certi
fi
cate for handling
refrigerant
fl
uids. Refer to regulation and laws in use on installation place.
Install the product by following local codes and regulations in force at the place of
installation, and the instructions provided by the manufacturer.
This product is part of a set constituting an air conditioner. The product must not be
installed alone or be installed with non-authorized device by the manufacturer.
Always use a separate power supply line protected by a circuit breaker operating on all
wires with a distance between contact of 3 mm for this product.
To protect the persons, earth (ground) the product correctly, and use the power cable
combined with an Earth Leakage Circuit Breaker (ELCB).
This product is not explosion proof, and therefore should not be installed in explosive
atmosphere.
Do not touch the
fi
ns of the heat exchanger. Touching the heat exchanger
fi
ns could
result in damage to the
fi
ns or personal injury such as skin rupture.
This product contains no user-serviceable parts. Always consult experienced service
technicians for repairing.
When moving or relocating the air conditioner, consult experienced service technicians
for disconnection and reinstallation of the product.
Do not place any other electrical products or household belongings under indoor unit or
outdoor unit. Dripping condensation from the unit might get them wet, and may cause
damage or malfunction of your property.
2. ABOUT THIS PRODUCT
2.1. Precautions for using R410A refrigerant
WARNING
The basic installation work procedures are the same as conventional refrigerant (R22)
models.
However, pay careful attention to the following points:
Since the working pressure is 1.6 times higher than that of conventional refrigerant
(R22) models, some of the piping and installation and service tools are special. (See
the table below.)
Especially, when replacing a conventional refrigerant (R22) model with a new refrigerant
R410A model, always replace the conventional piping and flare nuts with the R410A piping
and
fl
are nuts.
Models that use refrigerant R410A have a different charging port thread diameter to pre-
vent erroneous charging with conventional refrigerant (R22) and for safety. Therefore,
check beforehand. [The charging port thread diameter for R410A is 1/2-20 UNF.]
Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant (R22) models. Also, when storing the piping, securely seal the opening by
pinching, taping, etc.
When charging the refrigerant, take into account the slight change in the composition of
the gas and liquid phases. And always charge from the liquid phase where refrigerant
composition is stable.
2.2. Special tools for R410A
Tool name
Contents of change
Gauge manifold
Pressure is high and cannot be measured with a conven-
tional (R22) gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
It is recommended the gauge with seals -0.1 to 5.3 MPa
(-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.
Charge hose
To increase pressure resistance, the hose material and base
size were changed.
Vacuum pump
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of residual
oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or
discolored portion (especially on the interior surface). Otherwise, the expansion value or
capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is neces-
sary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table1. Never use copper
pipes thinner than 0.8 mm even when it is available on the market.
AIR CONDITIONER
OUTDOOR UNIT
INSTALLATION MANUAL
PART No. 9332809107-02
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