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Note: This manual describes how to install the air conditioner described above. Handling
and installation shall only be done by professionals as outlined in this manual.
1. SAFETY PRECAUTIONS
1
x
Be sure to read this manual thoroughly before installation.
x
The warnings and precautions indicated in this manual contain important informa-
tion pertaining to your safety. Be sure to observe them.
x
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 repair-
ing the product.
WARNING
Indicates a potentially or imminently hazardous situation which,
if not avoided, could result in death or serious injury.
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 fire. If the product is installed in
disregard of the instructions in this Manual, it will void the manufacturer’s warranty.
Do not turn on the power until all work has been completed. Turning on the power before
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If refrigerant leaks when you are working, ventilate the area. If the leaking refrigerant is
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lines. Excess pressure can cause a rupture.
Installation must be performed in accordance with regulations, codes, or standards for
electrical wiring and equipment in each country, region, or the installing place.
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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.
CAUTION
Indicates a potentially hazardous situation that may result in
minor or moderate injury or damage to property.
Read carefully all safety information written in this manual before you install or use the
air conditioner.
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).
The product is not explosion proof, and therefore should not be installed in explosive
atmosphere.
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 5 minutes or
more before you touch the electrical components.
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 the product.
Condensation dripping from the product might get them wet, and may cause damage or
malfunction of the property.
2. ABOUT THIS PRODUCT
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
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Models that use refrigerant R410A have a different charging port thread diameter
to prevent 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.
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2.2. Special tools for R410A refrigerant
Tool name Changes
Gauge manifold
Pressure is high and cannot be measured with a conventional
(R22) gauge. To prevent erroneous mixing of other refriger-
ants, the diameter of each port has been changed.
It is recommended to use 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 re-
sidual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed
or discoloured 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.
AIR CONDITIONER
INDOOR UNIT (Wall Mounted Type)
INSTALLATION MANUAL
PART No. 9387082241
For authorized service personnel only.
Refer to the rating label with the serial number.
Contents
1. SAFETY PRECAUTIONS ................................................................. 1
2. ABOUT THIS PRODUCT..................................................................1
3. GENERAL SPECIFICATION ............................................................2
4. SELECTING THE INSTALLATION LOCATION ................................ 3
5. INSTALLATION WORK .................................................................... 3
6. ELECTRICAL WIRING ..................................................................... 5
7. FINISHING........................................................................................6
8. FRONT PANEL REMOVAL AND INSTALLATION ........................... 7
9. REMOTE CONTROLLER INSTALLATION ....................................... 7
10. OPTIONAL KIT INSTALLATION ....................................................... 8
11. FUNCTION SETTING...................................................................... 8
12. CHECK LIST ..................................................................................... 9
13. TEST RUN ........................................................................................ 9
14. CUSTOMER GUIDANCE ................................................................. 9
15. ERROR CODES ............................................................................ 10
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