En-1
1. SAFETY PRECAUTIONS
The warnings and precautions indicated in this manual contain important information
pertaining to your safety. Be sure to observe them.
WARNING
This mark indicates procedures which, if improperly per-
formed, 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
For the air conditioner to operate satisfactorily, install it as outlined in this installation
manual.
The appliance shall be installed in accordance with national wiring regulations.
Never touch electrical components immediately after the power supply has been
turned off. Electrical shock may occur. After turning off the power, always wait
5 minutes or more before touching 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.
Connect the indoor unit and outdoor unit with the air conditioner piping and cable
available standard parts.
This installation manual describes the correct connections using the installation set
available from our standard parts.
Do not use an extension cable.
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.
If the supply cable is damaged, it must be replaced by the manufacture, its service
agent or similarly quali
fi
ed persons in order to avoid a hazard.
CAUTION
When installing pipes shorter than 5 m, sound of the outdoor unit will be transferred to
the indoor unit, which will cause large operating sound or some abnormal sound.
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.
The unit must be correctly grounded and the supply line must be equipped with a
differential breaker in order to protect the persons.
The units are not explosion proof and therefore should not be installed in explosive
atmosphere.
This unit contains no user-serviceable parts. Always consult authorized service
personnel to repairs.
Children should be monitored to ensure they do not play with the device.
Contents
1. SAFETY
PRECAUTIONS
.......................................................................................... 1
2. ABOUT
THE
UNIT
..................................................................................................... 1
3. SELECTING THE MOUNTING POSITION ............................................................... 3
4. INSTALLATION
DIAGRAM
........................................................................................ 3
5. INSTALLATION
......................................................................................................... 4
6. PUMP
DOWN
............................................................................................................ 6
Notes:
• This manual describes how to install the outdoor unit only. To install the indoor unit,
refer to the installation manual included with the indoor unit.
• Be sure to read this manual thoroughly before the installation.
• 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.
• After the installation, explain correct operation to the customer by using the operating
manual.
This product is not intended to be used by people (including children) with physical,
sensory or mental disability, or persons lacking experience or knowledge unless they
have been given by the through a person responsible for their safety, supervision or
instruction concerning the use of the device.
Do not touch the aluminum
fi
ns of heat exchanger built-in the indoor or outdoor unit to
avoid personal injury when you install or maintain the unit.
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.
• Be careful not to scratch the air conditioner when handling it.
• After installation, explain correct operation to the customer, using the operating manual.
2. ABOUT THE UNIT
2.1. Precautions for using R410A refrigerant
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 inch.]
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 table below. Never use
copper pipes thinner than 0.8mm even when it is available on the market.
Thicknesses of Annealed Copper Pipes
Pipe outside diameter
Thickness
6.35 mm (1/4 in.)
0.80 mm
9.52 mm (3/8 in.)
0.80 mm
12.70 mm (1/2 in.)
0.80 mm
15.88 mm (5/8 in.)
1.00 mm
19.05 mm (3/4 in.)
1.20 mm
WARNING
Do not use the existing (for R22) piping and
fl
are nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise and
cause failure, injury, etc. (Use the special R410A materials.)
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 failure, injury, etc.
AIR CONDITIONER
OUTDOOR UNIT
INSTALLATION MANUAL
9377863133
9377863133_IM.indb 1
9377863133_IM.indb 1
11/25/2011 11:30:55 AM
11/25/2011 11:30:55 AM
