100 mm (4”)
1. INDOOR UNIT
(1) Install the indoor unit level on a strong wall, floor, ceiling which is not sub-
ject to vibration.
(2) The inlet and outlet ports should not be obstructed : the air should be able
to blow all over the room.
(3) Install the unit near an electric outlet or special branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc. into consideration and leave the spaces shown in
Fig. 1. Also install the unit where the filter can be removed.
Fig. 1
•••••
Floor console
1
2. OUTDOOR UNIT
WARNING
(1) Install the unit where it will not be tilted by more than 5˚.
(2) When installing the outdoor unit where it may exposed to strong wind, fasten it securely.
(1) If possible, do not install the unit where it will exposed to direct sunlight. (If necessary, install a blind that does not interfere with the air flow.)
(2) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as much as possible.
(3) Install the unit when connection to the indoor unit is easy.
(4) During heating operation, drain water flows from the outdoor unit. Therefore, install the outdoor unit in a place where the drain water flow will not be
obstructed. (Reverse cycle model only)
(5) Do not place animals and plants in the path of the warm air.
(6) Take the air conditioner weight into account and select a place where noise and vibration are small.
(7) Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.
(8) Provide the space shown in Fig. 2 so that the air flow is not blocked. Also for efficient operation, leave open three of the four directions front, rear, and both
sides.
Fig. 2
INSTALLATION PROCEDURE
Install the room air conditioner as follows:
Floor Console/Under Ceiling Dual Type
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9373244011-03)
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.
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:
(1) 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 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 charging with
conventional refrigerant (R22) and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is
1/2 UNF 20 threads per inch.]
(3) 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 openings 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.
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/10 m. Do not use copper pipes having a
collapsed, deformed or discolored portion (especially on the interior surface).
Otherwise, the expansion valve or capillary tube may become blocked with
contaminants.
As an air conditioner using R410A incurs pressure higher than when using
R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table 1. Never
use copper pipes thinner than 0.8 mm (Nominal diameter is 1/4 in., 1/2 in.),
even when it is available on the market.
For authorized service personnel only.
WARNING
(1) For the room air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
(2) Connect the indoor unit and outdoor unit with the room air conditioner piping and cables available standards parts. This
installation instruction sheet describes the correct connections using the installation set available from our standard parts.
(3) Installation work must be performed in accordance with national wiring standards by authorized personnel only.
(4) 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.
(5) Do not use an extension cable.
(6) Do not turn on the power until all installation work is complete.
•••••
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 air conditioner is serviced or moved.
SELECTING THE MOUNTING POSITION
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 combustible 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 cannot reach the unit.
Decide the mounting position with the customer as follows:
Refrigerant
R410A
Contents of change
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous 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 (–76 cmHg to 53 kgf/cm
2
) for high pressure.
–0.1 to 3.8 MPa (–76 cmHg to 38 kgf/cm
2
) 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.
Tool name
Gauge manifold
Charge hose
Vacuum pump
Gas leakage detector
Table 1 Thicknesses of Annealed Copper Pipes
Nominal
diameter (inch)
1/4
1/2
Thickness (mm)
R410A
[ref.] R22
0.80
0.80
0.80
0.80
Outer diameter
(mm)
6.35
12.7
Left
Right
30 cm (12”) or more
30 cm (12”) or more
•••••
Under ceiling
Right
Left
Indoor unit
Ceiling
Ceiling
15 cm (6”) or more
30 cm (12”) or more
2 cm (3/4”) or more
10 cm (4”)
or over
10 cm (4”)
or over
60 cm (2’)
or over
60 cm (2’)
or over
60 cm (2’)
or over
STANDARD PARTS
The following installation parts are furnished. Use them as required.
INDOOR UNIT ACCESSORIES
Name and Shape
Cover plate (left)
Cover plate (right)
Tapping screw (ø4
×
10)
Installation template
Bracket (left)
Bracket (right)
Special nut
Wall bracket
Tapping screw (ø4
×
20)
Coupler heat insulator
(large)
Coupler heat insulator
(small)
Nylon fastener
Q’ty
1
1
2
1
1
1
4
2
6
1
1
1
Application
For positioning the indoor
unit
For under ceiling type
For suspending the indoor
unit from ceiling
For suspending the indoor
unit on the wall.
For fixing the wall bracket.
For indoor side pipe joint
(Large pipe)
For indoor side pipe joint
(Small pipe)
For fixing the drain hose
Name and Shape
Drain hose
Insulation (drain hose)
VT wire
Remote controller
Battery (penlight)
Remote controller holder
Tapping screw (ø3
×
12)
Q’ty
1
1
1
1
2
1
2
Application
Adhesive type 70
×
230
For fixing the drain hose
L 280 mm
Use for air conditioner
operation
For remote controller
Use as remote controller
holder
For remote controller holder
installation
OUTDOOR UNIT ACCESSORIES
Application
For outdoor unit drain piping
work
[Heat & Cool model
(Reverse cycle) only]
Q’ty
1
2
Name and Shape
Drain pipe
Drain cap
OPTIONAL PARTS FOR INDOOR UNIT
Name and Shape
Part No.
Application
Joint pipe-A
9302812021
For indoor side pipe joint
CONNECTION PIPE REQUIREMENT
Table 2
•••••
Use pipe with water-resistant heat insulation.
PREPARING INDOOR UNIT
INSTALLATION
1. REMOVE THE INTAKE GRILLE
Open the intake grille and remove the three screws (Fig. 3).
Fig. 3
Remark: The main unit can be wired before the indoor unit is in-
stalled. Select the most appropriate installation order.
Machine screw
Tapping screw
Intake grille
Tapping screw
2
INDOOR UNIT INSTALLATION
A. FLOOR CONSOLE TYPE
1. DRILLING FOR PIPING
Select piping and drain directions (Fig. 4).
The piping and drain can be made in three directions as shown below.
Fig. 4
The drain hose can be connected to either the left or right side (Fig. 5).
Fig. 5
Drain hose
(Right side)
Drain hose
(Left side)
When installing set to wall install the accessory wall bracket at the posi-
tion shown in Fig. 7, and mount the set to it.
Fig. 7
Wall
Outdoor side
6 mm (1/4”)
Indoor side
2. INSTALLING THE DRAIN HOSE
Select whether the drain hose will be connected to the left or right side
(Fig. 5).
Insert the drain hose into the drain pan, then secure the drain hose with a
nylon fastener (Fig. 8).
Fig. 8
Nylon fastener
Wrap the insulation (drain hose) around the drain hose connection
(Fig. 9).
Fig. 9
Drain pan
Drain hose
Insulation (Drain hose)
Drain pan
Drain hose
Be sure to arrange the drain hose so that it is leveled lower than the drain
hose connecting port of the indoor unit.
Fig. 10
CAUTION
Do not install the unit so that the drain hose side is too
high. Height A should be less than 5 mm (Fig. 11).
Fig. 11
Arrange the drain
hose lower than
this portion.
Drain hose
B. UNDER CEILING TYPE
Using the installation template, drill holes for piping and suspension bolts
(for holes) (Fig. 12).
Fig. 12
Drain hose
900 mm (35-7/16”)
200 mm
(7-7/8” )
Drilling position
for piping
Installation
template
Drilling position
for suspension
bolt
Ceiling
Wall
1. DRILLING FOR PIPING
Select piping and drain directions (Fig. 13).
Fig. 13
CAUTION
Install the drain hose at the rear; it should not be installed
on the top or right side.
When the directions are selected, drill 80 mm (3-1/8”) and 50 mm (2”) or
150 mm (6”) dia. hole on the wall so that the hole is tilted downward to-
ward the outdoor for smooth water flow.
Fig. 14
Top
Rear (Install the
drain hose in this
direction.)
Right
Wall
6 mm (1/4”)
Indoor side
Outdoor side
When the directions are selected, drill a 10 cm (4”) dia. hole on the wall so
that the hole is tilted downward toward the outdoor for smooth water flow.
When the pipe is led out from the rear, make a hole in Fig. 6, at the posi-
tion shown.
Fig. 6
4. INSTALLING INDOOR UNIT
Reset the hex bolts as shown in Fig. 18.
Fig. 18
Hex bolt
Indoor unit
8 to 13 mm
(5/16” to 1/2”)
Bolt
Bracket
Indoor unit
Remove the hole cover.
Drain hose
Arrange the drain hose
lower than this portion.
Piping hole
VT wire
hole
Pass the drain hose
through here.
Base (Bottom)
Cut the grille
VT wire
Drain hose
Intake grille
3
OUTDOOR UNIT INSTALLATION
1. OUTDOOR UNIT PROCESSING
WARNING
(1) Install the unit where it will not be tilted by more than 5˚.
(2) When installing the outdoor unit where it may exposed
to strong wind, fasten it securely.
•
Set the unit on a strong stand, such as one made of concrete blocks to
minimize shock and vibration.
•
Do not set the unit directly on the ground because it will cause trouble.
•
Since the drain water flows out of the outdoor unit during heating op-
eration, install the drain pipe and connect it to an commercial 16 mm
hose. (Heat & Cool model (Reverse cycle) only)
•
When installing the drain pipe, plug all the holes (• hole at one place)
other than the drain pipe mounting hole in the bottom of the outdoor
unit with putty so there is no water leakage. (Fig. 22) (Heat & Cool model
(Reverse cycle) only)
CAUTION
Installation in cold regions. Do not use the accessory drain
pipe and drain cap.
(If the drain pipe and drain cap are used, the drain water in
the pipe may freeze in extremely cold weather.)
Fig. 22
2. OUTDOOR UNIT CONNECTION CABLE AND
PIPE CONNECTION PREPARATIONS
Remove outdoor unit terminal cover.
Fig. 23
Terminal cover
*
After removing the screws,
remove terminal cover.
4
CONNECTING THE PIPING
WARNING
Do not use the existing (for R22) 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.)
CAUTION
(1) Do not use mineral oil on flared part.
Prevent mineral oil from getting into the system as this
would reduce the lifetime of the units.
(2) Never use piping which has been used for previous
installations. Only use parts which are delivered with
the unit.
(3) While welding the pipes, be sure to blow dry nitrogen
gas through them.
CAUTION
The maximum lengths of this product are shown in table 3.
If the units are further apart than this, correct operation
can not be guaranteed.
1. LIMITATION OF REFRIGERANT PIPING LENGTH
Table 3
Max length (L)
Max height difference (H)
20 m (66 ft)
8 m (20 ft)
Outdoor unit
Indoor unit
Fig. 24
2. FLARING PROCESSING
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and
remove the burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor
and outdoor units respectively) onto the pipe and perform the flare
processing with a flare tool.
Use the special R410A flare tool, or the conventional (for R22) flare
tool.
When using the conventional flare tool, always use an allowance ad-
justment gauge and secure the A dimension shown in table 4.
Fig. 25
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
Table 4 Pipe outside diameter
L
3. BENDING PIPES
(1) When bending the pipe, be careful not to crush it.
(2) To prevent crushing of the pipe, do not bend the pipe at a radius cur-
vature of 100 mm or over.
(3) If the copper pipe is bend the pipe or pulled to often, it will become
stiff. Do not bend the pipes more than three times at one place.
4. CONNECTION PIPES
(1) Centering the pipe against port on the indoor unit, turn the flare nut
with your hand (Fig. 26).
Be sure that the small pipe is completely installed before connecting
the large the pipe.
Fig. 26
Pipe outside
diameter
6.35 mm (1/4 in.)
12.7mm (1/2 in.)
A (mm)
Conventional (R22) flare tool
Clutch type
Wing nut type
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
2.0 to 2.5
Flare tool for
R410A, clutch type
0 to 0.5
0 to 0.5
CAUTION
Be sure to apply the pipe against the port on the indoor
unit correctly. If the centering is improper, the flare nut
cannot be tightened smoothly. If the flare nut is forced to
turn, the threads will be damaged.
Indoor unit side
Optional parts
(2) Install the outdoor unit wall cap (supplied with the optional installation
set or procured at the site) to the wall hole pipe.
(3) Connect the outdoor unit and indoor unit piping.
(4) After matching the center of the flare surface and tightening the nut
hand tight, tighten the nut to the specified tightening torque with a
torque wrench.
Fig. 27
Table 5 Flare nut tightening torque
Do not remove the cap from the connection pipe before connecting
the pipe.
Flare nut
6.35 mm (1/4 in.) dia.
12.7 mm (1/2 in.) dia.
Tightening torque
14 to 18 N · m (140 to 180 kgf · cm)
50 to 62 N · m (500 to 620 kgf · cm)
Tighten with 2 wrenches.
Wrench (fixed)
Flare nut
Connection pipe
Indoor unit
pipe
Torque wrench
To prevent gas leakage,
coat the flare surface with
alkylbenzene oil (HAB).
Do not use mineral oil.
CAUTION
Be sure to connect the large pipe after connecting the small
pipe completely.
5. HEAT INSULATION ON THE PIPE JOINTS
(INDOOR SIDE ONLY)
Put coupler heat insulator on the joints (indoor side only) (Fig. 28).
Fig. 28
Indoor unit
No gap
Coupler heat
insulator
(large)
Coupler heat
insulator (small)
No gap
Coupler heat
insulation
50 cm (20”)
24.5 cm
(9-5/8”)
6.5 cm (2-1/2”)
10 cm (4”) hole
5 cm (2”) hole
12.5 cm (5”)
10 cm (4”)
6.5 cm (2-1/2”)
65.5 cm (26”)
53 cm (21”)
4.5 cm (1-3/4”)
Wall bracket
Side of set
99 cm (39”)
OK
NO
Indoor unit
Outdoor unit
Outdoor unit
Indoor unit
Be sure to overlap
the insulation
Large pipe
Small pipe
- Continued on back -
12.7 mm (1/2”) dia.
6.35 mm (1/4”) dia.
Diameter
Small
Large
Maximum
length
Maximum Height
(between indoor
and outdoor)
6.35 mm (1/4 in.) 12.7 mm (1/2 in.)
15 m (49 ft)
8 m (26 ft)
CAUTION
Install heat insulation around both the gas and liquid pipes.
Failure to do so may cause water leaks.
Use heat insulation with heat resistance above
120 °C. (Reverse cycle model only)
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).
12.7 mm (1/2”) dia.
6.35 mm (1/4”) dia.
Hole
Drain cap
Bottom of outdoor unit
Drain pipe
Hole
Drain cap
Drain pipe hole
Bottom plate
Drain pipe
Drain hose
(commercial hose,
inside diameter 16 mm)
L
L
H
H
Apply the indoor unit to the brackets (Fig. 19).
Fig. 19
Now, securely tighten the hex bolts in both sides.
5. INSTALLING THE DRAIN HOSE
Select whether the drain hose will be connected to the left or right side
(Fig. 5).
Insert the drain hose into the drain pan, then secure the drain hose with a
nylon fastener (Fig. 8).
Wrap the insulation (drain hose) around the drain hose connection
(Fig. 9).
Be sure to arrange the drain hose so that it is leveled lower than the drain
hose connecting port of the indoor unit (Fig. 20).
Fig. 20
When drain hose is arranged backward.
Secure the drain hose with the VT wire (Fig. 21).
Fig. 21
3. INSTALLING BRACKETS
Install the bracket with nuts, spring washers (Fig. 17).
Fig. 17
Spring washer
(Field supply)
Special nut A
(Accessories)
Bracket
Bracket (Left)
Bracket (Right)
Ceiling panel
M10 Nut (Field supply)
M10 Nut (Field supply)
2. DRILLING THE HOLES AND ATTACHING THE
SUSPENSION BOLTS
Drill ø25 mm holes at the suspension bolt locations, then install the bolts
(Fig. 15).
Fig. 15
Bolt Strength
980 to 1470 N (100 to 150 kgf)
ø25 mm
Ceiling panel
20 to 50 mm
[If using anchor bolts]
Drill holes for anchor bolts at the locations at which you will set the sus-
pension bolts.
Note that anchor bolts are M10 bolts (to be obtained locally) (Fig. 16).
Fig. 16
Anchor-Bolt Strength
980 to 1470 N (100 to 150 kgf)
20 to
50 mm
Ceiling
M10 Anchor bolt
(Field supply)
9373244011-03_IM_front.p65
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