SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9377795021)
Special tools for 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/10m. 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 conventional refrigerant, it is necessary to choose
adequate materials.
Thicknesses of copper pipes used with R410A are as shown in table. Never use copper pipes thinner than 0.8 mm
even when it is available on the market.
Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent errone-
ous 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.
To increase pressure resistance, the hose material and base size were changed.
A conventional vacuum pump can be used by installing a vacuum pump adapter.
Special gas leakage detector for HFC refrigerant R410A.
Thicknesses of Annealed Copper Pipes (R410A)
Tool name
Gauge manifold
Charge hose
Vacuum pump
Gas leakage detector
Nominal diameter
1/4
3/8
1/2
Outer diameter (mm)
6.35
9.52
12.70
Thickness (mm)
0.80
0.80
0.80
The basic installation work procedures are the same as conventional refrigerant models.
However, pay careful attention to the following points:
(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping
and installation and service tools are special. (See the table below.)
Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace
the conventional piping and flare nuts with the R410A piping and flare nuts.
(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charg-
ing with conventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diam-
eter for R410A is 1/2 threads per inch.]
(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also,
when storing the piping ,securely seal the opening by pinching, taping, etc.
(4) 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 side whose composition is stable.
This air conditioner uses new refrigerant HFC (R410A).
DANGER
This mark indicates procedures which, if improperly performed, are most likely to result in the death of or
serious injury to the user or service personnel.
WARNING
This mark indicates procedures which, if improperly performed, 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.
SELECTING THE MOUNTING
POSITION
Decide the mounting position with the customer as follows:
INDOOR UNIT
(1) Install the indoor unit level on a strong wall which is not subject
to vibration.
(2) The inlet and outlet ports should not be obstructed : the air should
be able to blow all over the room.
(3) Do not install the unit where it will be exposed to direct sunlight.
(4) Install the unit where connection to the outdoor unit is easy.
(5) Install the unit where the drain pipe can be easily installed.
(6) Take servicing, etc. into consideration and leave the spaces shown
in figure. Also install the unit where the filter can be removed.
WARNING
Install at a place that can withstand the weight of the
indoor and outdoor units and install positively so that
the units will not topple or fall.
CAUTION
(1) Do not install where there is the danger of com-
bustible gas leakage.
(2) Do not install near heat sources.
(3) If children under 10 years old may approach the
unit, take preventive measures so that they can-
not reach the unit.
(4) Install the indoor unit on the wall where the height
from the floors more than 230 cm.
STANDARD ACCESSORIES
The following installation accessories are supplied. Use them as
required.
INDOOR UNIT ACCESSORIES
Name and Shape
Q’ty
Tapping screw (big)
Tapping screw (small)
Cloth tape
Wall hook bracket
Remote
control unit
Battery (penlight)
Remote control
unit holder
1
Q’ty
1
2
1
1
8
2
Name and Shape
Air cleaning filter
Air cleaning filter
frame
2
2
FRONT PANEL REMOVAL AND INSTALLATION
THE INTAKE GRILLE REMOVAL
(1) Open the intake grille.
(2) Pull down the knob.
(3) Lift the intake grille upward, until the axle at the top of the intake
grille is removed.
THE INTAKE GRILLE INSTALLATION
(1) The fixing axle of the intake grille is installed on the Panel.
(2) Lay down the intake grille.
THE FRONT PANEL REMOVAL
(1) Remove intake grille (Reference the intake grille removal.)
(2) Remove four screws.
(3) The thumb is hung on the lower part as shown in the figure, and it
pulls to the front, pushing [-] mark , and bottom hooks (two posi-
tion) is removed from wall hook bracket.
(4) The front panel bottom is pulled to the front, and bottom hooks is
removed indoor unit.
(5) The front panel is pulled to the front, raising the upper surface,
and a front panel is removed.
THE FRONT PANEL INSTALLATION
(1) Firstly, fit the lower part of the front panel, and insert top and bot-
tom hooks. (Three top sides, six bottom sides)
(2) Four screws is attached.
(3) The intake grille is attached.
Bottom hole
(six positions)
Front panel
Indoor unit
Bottom hooks
(six positions)
Front panel
Bearing
Mounting shaft
Intake grille
Intake grille
Knob
Top holes (two sides)
Top hole (center)
Top hook (center)
Front panel
Top hooks
(two sides)
Indoor unit
Wall hook bracket
Front panel
Push
[-] mark
Push
Front panel
Screws
(4 positions)
INSTALLATION DIAGRAM OF
INDOOR UNITS
6 cm or over
Wall hook bracket
5 cm or over
9 cm or over
150 cm or over
(Wall cap)
Remote control unit
Tapping
screw
(small)
Remote
control
unit holder
230 cm or over
Connection Cord
Conform to Type245 IEC57
[Indoor unit piping direction]
The piping can be connected in the 6 directions indicated.
When the piping is connected in direction
2
,
3
,
4
or
5
cut
along the piping groove in the side of the front cover with a
hacksaw.
(Rear)
1
Rear outlet
2
Right
outlet
3
Bottom outlet
4
Left bottom
outlet
5
Left
outlet
6
Left rear
outlet
Connection pipe assembly
Connection cord (4-conductor)
Wall pipe
Decorative tape
Vinyl tape
Wall cap
Saddle
Drain hose
Tapping screws
Sealant
Name
Q’ty
1
1
1
1
1
1
1 set
1
1 set
1
The following items are necessary to install this air conditioner. (The
items are not included with the air conditioner and must be purchased
separately.)
WARNING
1
1
1
1
1
Do not use the existing (for conventional refrigerant) piping and flare nuts.
· If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury, etc. (Use
the special R410A materials.)
2
2
2
2
2
When installing and relocating the air conditioner, do not mix gases other than the specified 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
breakage, injury, etc.
For authorized service personnel only.
DANGER
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.
WARNING
1
1
1
1
1
For the room air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
2
2
2
2
2
Connect the indoor unit and outdoor unit with the room air conditioner piping and cords available standards parts. This
installation instruction sheet describes the correct connections using the installation set available from our standard parts.
3
3
3
3
3
Installation work must be performed in accordance with national wiring standards by authorized personnel only.
4
4
4
4
4
Also, do not use an extension cord.
5
5
5
5
5
Do not turn on the power until all installation work is complete.
6
6
6
6
6
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
7
7
7
7
7
Use a vacuum pump for R410A exclusively.
8
8
8
8
8
Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.
9
9
9
9
9
Use a clean gauge manifold and charging hose for R410A exclusively.
:
:
:
:
:
If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it
produces a toxic gas.
•
Be careful not to scratch the room air conditioner when handling it.
•
After installation, explain correct operation to the customer, using the operating manual.
•
Let the customer keep this installation instruction sheet because it is used when the room air conditioner is serviced or
moved.
ELECTRICAL REQUIREMENT
•
Use conformed cord with Type 245 IEC57.
•
Electric wire size:
Connection cord (mm
2
)
MAX.
2.5
MIN.
1.5
•
Install the disconnect device with a contact gap of at least 3 mm nearby
the units. (Both indoor unit and outdoor unit)
•
Always make the air conditioner power supply a special branch circuit
and provide a special breaker.
CONNECTION PIPE REQUIREMENT
CONNECTION PIPE SIZE
Diameter
Large
9.52 mm
(3/8 in.)
12.7 mm
(1/2 in.)
Small
6.35 mm
(1/4 in.)
6.35 mm
(1/4 in.)
Model
7, 9 and
12 TYPE
14 and 18 TYPE
CAUTION
Install heat insulation around both the gas and liquid pipes.
Failure to do so may cause water leaks.
In addition, if the humidity level at the installation location
of the refrigerant piping is expected to exceed 70%, install
heat insulation around the refrigerant piping. If the ex-
pected humidity level is 70-80%, use heat insulation that
is 15 mm or thicker and if the expected humidity exceeds
80%, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as specified,
condensation may form on the surface of the insulation.
In addition, use heat insulation with heat conductivity of
0.045 W/(m·K) or less (at 20
°
C).
Connect the connection pipes according to “4 CONNECTING THE PIP-
ING” in this installation instruction sheet.
- Continued on back -
Be sure that the top hole of the front panel is hooked securely to the hook of the base.
CAUTION
Install the front panel and INTAKE GRILLE securely. If installation is imperfect, the front panel or INTAKE
GRILLE may fall off and cause injury.
