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English
• Do not install the air conditioner in the following locations:
1.
Where there is a high concentration of mineral oil spray
or vapour (e.g. a kitchen).
Plastic parts will deteriorate, parts may fall off and water
leakage could result.
2.
Where corrosive gas, such as sulphurous acid gas, is
produced.
Corroding of copper pipes or soldered parts may result
in refrigerant leakage.
3.
Near machinery emitting electromagnetic radiation.
Electromagnetic radiation may disturb the operation of
the control system and result in a malfunction of the unit.
4.
Where flammable gas may leak, where there is carbon
fibre or ignitable dust suspensions in the air, or where
volatile flammables such as paint thinner or gasoline
are handled.
Operating the unit in such conditions may result in fire.
2.
BEFORE INSTALLATION
2-1
About This Product
• This product uses R744 (CO
2
) refrigerant. The utmost atten-
tion is required to handle R744 refrigerant, and strict mea-
sures must be taken to keep impurities (including mineral oil
and other types of oil as well as moisture) out of the system.
Be sure to follow the instructions in “6. REFRIGERANT PIP-
ING WORK”.
• The design pressure is 12.3 MPa (4.0 MPa for R410A).
Therefore, the following conventional parts cannot be used.
• Connection pipes
............. Thick-walled pipes are required. Refer to
“6. REFRIGERANT PIPING WORK” for the
specifications of the pipes.
• Flare nut connections
............. Unavailable. Perform brazing connections.
• Pipe brazing joints
Pipes with a maximum diameter of 12.7 mm
............. Make brazing connections with sleeve flare
processing.
Pipes with a diameter of 15.9 mm
............. Use sockets sold as optional accessories.
• Elbows
............. Use products sold as optional accessories.
• Installation instruments that must withstand high pres-
sures, such as charge hoses and pressure gauges
............. Use pressure-resistant instruments that with-
stand a minimum pressure of 12.3 MPa.
• The outdoor unit and BEV unit are R744-dedicated units.
Check the model names of connectable indoor units with
datasheets including catalogs. The air conditioner will not
operate normally if other indoor unit models are connected.
•
When moving the unit while removing it from the carton
box, be sure to lift it by holding on to the four lifting lugs
without exerting any pressure on other parts, especially,
the refrigerant piping, drain piping, and other resin parts.
• The accessories needed for installation must be retained in
your custody until the installation work is completed. Do not
discard them!
• Decide upon a line of transport.
• Leave the unit inside its packaging while moving, until reach-
ing the installation site. Where unpacking is unavoidable, use
a sling of soft material or protective plates together with a
rope when lifting, to avoid damage or scratches to the unit.
• When moving the unit at or after opening, hold the unit by the
hanger brackets (×4). Do not apply force to the refrigerant
piping, drain piping or plastic parts.
• When selecting installation site, refer to the paper pattern.
• For the installation of an outdoor unit, refer to the installation
manual attached to the outdoor unit.
• Do not install or operate the unit in rooms mentioned below.
•
Laden with mineral oil, or filled with oil vapor or spray
like in kitchens. (Plastic parts may deteriorate which
could eventually cause the unit to fall out of place, or
could lead to leaks.)
•
Where corrosive gas like sulfurous gas exists. (Cop-
per tubing and brazed spots may corrode, which
could eventually lead to refrigerant leaks.)
•
Where exposed to combustible gases and where vol-
atile flammable gas like thinner or gasoline is used.
(Gas in the vicinity of the unit could ignite.)
•
Where machines can generate electromagnetic
waves. (Control system may malfunction.)
•
Where the air contains high levels of salt such as that
near the ocean and where voltage fluctuates greatly
such as that in factories. Also in vehicles or vessels.
• This unit, both indoor and outdoor, is suitable for installation in
a commercial and light industrial environment.
If installed as a household appliance it could cause electro-
magnetic interference.
2-2
PRECAUTIONS
• Be sure to read this manual before installing the indoor unit.
• Entrust installation to the place of purchase or a qualified ser-
viceman. Improper installation could lead to leaks and, in
worse cases, electric shock of fire.
• Use only parts provided with the unit or parts satisfying
required specifications. Unspecified parts could cause the
unit to fall out of place, or could lead to leaks and, in worse
cases, electric shock or fire.
2-3
ACCESSORIES
Check the following accessories are included with your unit.
Name
Metal clamp
Paper pattern for
installation
Quantity
1 pc.
1 pc.
Shape
Name
Drain hose
Insulation for fitting
Quantity
1 pc.
1 each.
Shape
for gas pipe
for liquid pipe
Name
Sealing pad
Screws for duct flanges
Quantity
1 each.
1 set
Shape
Large
mid
Name
Washer for hanging
bracket
Clamp
Quantity
8 pcs.
6 pcs.
Shape
FXSN20 . 25 . 32AV1
FXSN40 . 50AV1
FXSN63 . 100AV1
6
8
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