En-5
2. 3. Pipe requirement
CAUTION
Refer to the installation manual of the outdoor unit for description of the length of con-
necting pipe or for difference of its elevation.
Model
Diameter [mm (in)]
Gas pipe
Liquid pipe
12/14
9.52 (3/8)
6.35 (1/4)
18/22/24
12.70 (1/2)
6.35 (1/4)
30/36/45/54
15.88 (5/8)
9.52 (3/8)
• Use pipe with water-resistant heat insulation.
CAUTION
• Wrap heat insulation around both gas pipe and liquid pipe.
No heat-insulation work or incorrect heat-insulation work may cause water leaks.
• In a reverse cycle model, use heat insulation with heat resistance above 120 °C.
• If expected humidity of the installation location of refrigerant pipes is higher than
70 %, wrap the heat insulation around the refrigerant pipes.
If the expected humidity is between 70 % and 80 %, use heat insulation that has
a thickness of 15 mm or more.
If the expected humidity is higher than 80 %, use heat insulation that has a
thickness of 20 mm or more.
• The use of thinner heat insulation than speci
fi
ed above, may cause a condensation
on the surface of the insulation.
• Use heat insulation with thermal conductivity of 0.045 W/(m•K) or less, at 20 °C.
2. 4. Electrical requirement
The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate
power source.
WARNING
Standard for electrical wiring and equipment differs in each country or region. Before
you start electrical working, con
fi
rm related regulations, codes, or standards.
Cable
Conductor size
(mm
2
)
Type
Remarks
Connection cable
1.5 (MIN.)
Type 60245 IEC57
3Wire+Earth (Ground),
1
φ
230V
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
Cable
Conductor size
(mm
2
)
Type
Remarks
Remote controller
cable
(2-wire type)
0.33 to 1.25
Sheathed PVC
cable
Non-polar 2-wired,
twisted pair
Remote controller
cable
(3-wire type)
0.33
Sheathed PVC
cable
Polar 3-wired
2. 5. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name
Model No.
Application
Wired remote controller
UTY-RNR
Z
For air conditioner operation
(2-wired type)
UTY-RLR
UTY-RVN
M
For air conditioner operation
(3-wired type)
UTY-RNN
M
W-LAN interface
UTY-TFSXZ1
For wireless LAN control
IR receiver unit
UTY-LBT
M
For air conditioner operation
Remote sensor
UTY-XSZX
Room temperature sensor
External input and output
PCB
UTY-XCSX
For connecting external
devices
External input and output
PCB bracket
UTZ-GXNA
For installing the External input
and output PCB
External connect kit
UTY-XWZXZG
For control output port
Air
fi
lter kit
UTD-LFNA/B/C
LFNA : 36/45/54 model
LFNB : 18/22/24/30 model
LFNC : 12/14 model
3. INSTALLATION WORK
WARNING
• Do not turn on the power until all installation work is complete.
• Carrying and installation of the unit should be performed by a suf
fi
cient number of
people and with suf
fi
cient equipment that is adequate for the weight of the unit.
Performing such work with an insuf
fi
cient number of people or with inadequate equip-
ment could result in dropping of the unit or personal injury.
CAUTION
For installation details, refer to the technical data.
3. 1. Selecting an installation location
Decide the mounting position together with the customer as follows.
WARNING
Install the indoor unit where is capable to support the weight of the unit. Secure the
unit
fi
rmly so that the unit does not topple or fall.
CAUTION
Do not install the unit in the following areas:
– Area with high salt content, such as at the seaside. It will deteriorate metal parts,
causing the parts to fail or the unit to leak water.
– Area
fi
lled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit
to leak water.
– Area where is close to heat sources.
– Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to
corrode, which can cause refrigerant leakage.
– Area that can cause combustible gas to leak, contains suspended carbon
fi
bers or
fl
ammable dust, or volatile in
fl
ammables such as paint thinner or gasoline.
– If gas leaks and settles around the unit, it can cause a
fi
re.
– Area where animals may urinate on the unit or ammonia may be generated.
• Do not use the unit for special purposes, such as storing food, raising animals, grow-
ing plants, or preserving precision devices or art objects. It can degrade the quality of
the preserved or stored objects.
• Install the unit where drainage does not cause any trouble.
• Install the indoor unit, outdoor unit, power supply cable, transmission cable, and re-
mote control cable at least 1 m away from a television or radio receivers. The purpose
of this is to prevent TV reception interference or radio noise.
(Even if they are installed more than 1 m apart, you could still receive noise under
some signal conditions.)
• If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.
• Install the unit where ambient temperature does not reach 60°C or more.
Take a measure such as ventilation for an environment in which heat is retained.
(1) The inlet and outlet ports should not be obstructed; the air should be able to blow all
over the room.
(2) Leave the space required to service the air conditioner.
(3) Install the unit where connection to the outdoor unit is easy.
(4) Install the unit where the connection pipe can be easily installed.
(5) Install the unit where the drain pipe can be easily installed.
(6) Install the unit where noise and vibrations are not ampli
fi
ed.
(7) Take servicing, etc., into consideration and leave the spaces. Also install the unit where
the
fi
lter can be removed.
(8) Do not install the unit where it will be exposed to direct sunlight.
Correct initial installation location is important because it is dif
fi
cult to move unit after it is
installed.
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