Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the outdoor unit.
• For installation of the indoor unit, follow the Installation Manual attached to the indoor unit.
Outdoor Unit Installation Manual
ADOPTION OF NEW REFRIGERANT
This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional
refrigerant R22 in order to prevent destruction of the ozone layer.
For conforming to EMC standards for twin/triple systems
Color: White
(Used for indoor/outdoor connecting wires)
For conforming to EMC standards for twin/triple systems
Color: Gray
(Used for outdoor fan motor lead wire)
For conforming to EMC standards for twin/triple systems
(For clamping the clamp filter and ferrite core)
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Refrigerant Piping
• Piping kit used for the conventional refrigerant cannot be used.
• Use copper pipe with 0.8 mm or more thickness for Ø9.5 mm.
Use copper pipe with 1.0 mm or more thickness for Ø15.9 mm.
• Flare nut and flare works are also different from those of the conventional refrigerant.
Take out the flare nut attached to the air conditioner, and use it.
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2PRECAUTIONS FOR SAFETY
• Ensure that all Local, National and International regulations are satisfied.
• Read this “PRECAUTIONS FOR SAFETY” carefully before Installation.
• The precautions described below include the important items regarding safety.
Observe them without fail.
• After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
• Ask the customer to keep the Installation Manual together with the Owner’s 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.
• 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 wires.
• 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 wire correctly.
If the connecting wire is connected in a wrong way, electric parts may be damaged.
• When moving the air conditioner for the installation into another place, be very careful not to enter
any gaseous matter other than the specified refrigerant into the refrigeration cycle.
If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes
abnormally high and it may resultingly causes pipe burst and injuries on persons.
• 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 it carefully if there are possible damage.
• Do not install in a place that might 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.
Inappropriate 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 the concentration of refrigerant leakage occur in 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 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 falling unit.
• 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 generate.
• 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
might generate.
• 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 the specified wires for wiring connect the terminals securely fix.
To prevent external forces applied to the terminals from affecting the terminals.
Outdoor Unit Installation Manual
3-EN
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• 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 subject to a risk of exposure to a combustible gas.
If a combustible gas leaks, and stays 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.
• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop
the compressor before disconnecting the refrigerant pipe.
If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor
sucks air and the refrigeration cycle is overpressurized, which may cause a burst or injury.
Outdoor Unit Installation Manual
WARNING
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.
• The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its
pressure is approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant,
refrigerating oil has also been changed. Therefore, during installation work, be sure that water, dust, former
refrigerant, or refrigerating oil does not enter the refrigerating cycle.
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of
charging port of the main unit and installation tools are changed from those for the conventional refrigerant.
• Accordingly the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust
does not enter.
To Disconnect the Appliance from 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.
• The installation fuse 40 A (All type fuse can be used) must be used for the power supply line of this
conditioner.
3INSTALLATION OF NEW REFRIGERANT
EN
AIR CONDITIONER
• The R410A refrigerant is more susceptible to impurities such as water, oxide membrane, oils, and fats.
With the adoption of the new refrigerant, refrigerating oil has also been changed.
Be careful so that water, dust, conventional refrigerant, and/or conventional refrigerating oil do not
enter the refrigerating cycle of the new refrigerant air conditioner.
• To prevent different refrigerant or refrigerating oil being mixed, the sizes of the charging port of the unit
and the installation tool connecting sections are different from the conventional refrigerant. Accordingly
the following exclusive tools are required for the new refrigerant R410A.
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Required Tools/Equipment and Precautions for Use
Prepare the tools and equipment listed in the following table before starting installation work.
Newly prepared tools and equipment must be used exclusively.
Legend
: Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc..)
: Conventional tools/equipment are available
Gauge manifoldVacuuming/charging
Charging hosePrepared newly for R410A only
Charging cylinderCan not be used
Gas leak detectorGas leak checkPrepared newly
Vacuum pump with backflow
prevention function
Vacuum pump with backflow
prevention function
Flare toolFlare machining of pipesUsable if dimensions are adjusted.
BenderBending pipesR22 (Conventional tools)
Refrigerant recovery equipmentRefrigerant recoveryFor R410A only
Torque wrenchTightening flare nutsExclusive for Ø12.7 mm and Ø15.9 mm
Pipe cutterCutting pipesR22 (Conventional tools)
Prepared newly for R410A only
refrigerant and operation
check
Unusable (Use the refrigerant charging measure
instead.)
Vacuum dryingUnusable
Vacuum dryingR22 (Conventional tools)
For R410A only
Discriminated by the refrigerant name on the
cylinder.
Welding pipesR22 (Conventional tools)
Refrigerant Piping
New refrigerant (R410A)
When using the conventional piping kit
• When using the conventional piping kit that has no indication of applicable refrigerant types, be sure to
use it with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness
of 1.0 mm for Ø15.9 mm. Never use the conventional piping kit with a wall thickness less than these
thicknesses due to insufficient pressure capacity.
When using general copper pipes
• Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and
with a wall thickness of 1.0 mm for Ø15.9 mm.
Never use any copper pipes with a wall thickness less than these thicknesses.
Flare nuts and flare machining
• The flare nuts and flare machining are different from those for the conventional refrigerant.
Use the flare nuts supplied with the air conditioner or those for R410A.
• Before performing flare machining, carefully read “REFRIGERANT PIPING”
5-EN
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Outdoor Unit Installation Manual
4SELECTION OF INSTALLATION
Before installation
Be careful to the following items before
installation.
Length of refrigerant pipe
Length of refrigerant
pipe connected to
indoor/outdoor unit
5 m to 30 m
*31 m to 50 m
* Caution at addition of refrigerant
When the total length of refrigerant pipe
exceeds 30 m, add 40 g /m of refrigerant and
the maximum total length of pipe is 50 m. (Max.
amount of additional refrigerant is 800 g.)
Charge the refrigerant accurately. Overcharge
may cause a serious trouble of compressor.
* Do not connect a refrigerant pipe shorter than
5m.
This may cause a malfunction of the
compressor or other devices.
Addition of refrigerant is
unnecessary at the local site.
<Addition of refrigerant>
Add 40 g of refrigerant for
every 1m of pipe which
exceeds 30 m.
Item
Airtight test
1. Before starting an airtight test, further tighten
the spindle valves on the gas side and liquid
side.
2. Pressurize the pipe with nitrogen gas charged
from the service port to the design pressure
(4.15 Mpa) to conduct the airtight test.
3. After the airtight test is completed, evacuate the
nitrogen gas.
Earthing
WARNING
Make sure that proper earthing is provided.
Improper earthing may cause electric shock. For
how to check earthing, contact the dealer who
installed the air conditioner or a professional
installation company.
• Proper earthing can prevent charging of
electricity on the outdoor unit surface due to
high frequency of the frequency converter
(inverter) in the outdoor unit, as well as prevent
electric shock. If the outdoor unit is not properly
earthed, you may feel electric shock.
• 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 wires.
Test Run
Turn on the leakage breaker at least 12 hours
before starting a test run to protect the
compressor during startup.
CAUTION
Incorrect work may result in a malfunction or
complaints of customers.
EN
Air purge
• For air purge, use a vacuum pump.
• Do not use refrigerant charged in the outdoor
unit for air purge. (The refrigerant for air purge
is not contained in the outdoor unit.)
Electrical wiring
• Be sure to fix the power wires and indoor/
outdoor connecting wires with clamps so that
they do not contact with the cabinet, etc.
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Outdoor Unit Installation Manual
Installation Place
WARNING
Install the outdoor unit properly at a place that
is durable enough to the weight of the outdoor
unit.
Insufficient durability may cause the outdoor unit
to fall, which may result in injury.
CAUTION
Do not install the outdoor unit at a place
subject to combustible gas leak.
Accumulation of combustible gas around the
outdoor unit may cause a fire.
Install the outdoor unit at a place that meets
the following conditions after customer’s
consent is obtained.
• A well-ventilated place free from obstacles near
the air inlets and air outlet
• A place that is not exposed to rain or direct
sunlight
• A place that does not increase the operating
noise or vibration of the outdoor unit
• A place that does not cause any drainage
problem with discharged water
Do not install the outdoor unit at the following
places.
• A place full of saline atmosphere (coastal area)
or sulfide gas (hot-spring area)
(Special maintenance is required.)
• A place subject to oil, vapor, oily smoke, or
corrosive gas
• A place where organic solvent is used
• A place where high-frequency equipment
(including inverter equipment, private power
generator, medical equipment, and
communication equipment) is used
(Installation in this place may cause malfunction
of the air conditioner, abnormal control or
problems due to noise to such equipment.)
• A place where the discharged air of the outdoor
unit blows against the window of the
neighboring house
• A place where the operating noise of the
outdoor unit is transmitted
• When the outdoor unit is installed in an elevated
position, be sure to secure its feet.
• A place where the drain water does not make
any problem.
CAUTION
1. Install the outdoor unit at a place where
discharge air is not blocked.
2. When an outdoor unit is installed in a place
that is always exposed to a strong wind like
a coast or on a high storey of a building,
secure a normal fan operation by using a
duct or a wind shield.
3. When installing the outdoor unit in a place
that is constantly exposed to a strong wind
such as the upper stairs or rooftop of a
building, apply the windproof measures
referring to the following examples.
1) Install the unit so that its discharge port
faces to the wall of the building.
Keep a distance 500 mm or more between
the unit and the wall surface.
500
2) Supposing the wind direction during the
operation season of the air conditioner,
install the unit so that the discharge port is
set at right angle to the wind direction.
Strong
Strong
wind
• When using an air conditioner under low outside
temperature condition (Outside temp.:-5 °C or
lower) with COOL mode, prepare a duct or wind
shield so that it is not affected by the wind.
<Example>
Wind shield
wind
Wind shield
Wind shield
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