LO
HI
Gas
Liquid
R410A
1
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 sun-
light. (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) Do not place animals and plants in the path of the warm air.
(5) Take the air conditioner weight into account and select a place where
noise and vibration are small.
(6) Select a place so that the warm air and noise from the air conditioner
do not disturb neighbors.
(7) Provide the space shown in Fig. 3 so that the air flow is not blocked.
Also for efficient operation, leave open three of the four directions
front, rear, and both sides.
(8) 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)
Fig. 3
INSTALLATION PROCEDURE
Install the air conditioner as follows:
SPLIT TYPE AIR CONDITIONER
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9359992097)
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 con-
ventional 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., 3/8 in.,
1/2 in.), even when it is available on the market.
For authorized service personnel only.
WARNING
(1) For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from our 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) Do not turn on the power until all installation work is complete.
•
Be careful not to scratch the 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.
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
3/8
1/2
Thickness (mm)
R410A
[ref.] R22
0.80
0.80
0.80
0.80
0.80
0.80
Outer diameter
(mm)
6.35
9.52
12.70
INDOOR UNIT INSTALLATION
1. Position the ceiling hole and hanging bolts as
shown in Fig. 4.
Fig. 4
(4 directions)
(3 directions)
100 mm (4”) or more
Piping position
(2 directions)
100 mm (4”) or more
100 mm (4”) or more
(2 directions)
SELECTING THE MOUNTING POSITION
Pipe
Pipe
INDOOR UNIT
(1) Install the indoor unit on a place having a sufficient strength so that it
withstands against the weight of the indoor unit.
(2) The inlet and outlet ports should not be obstructed; the air should be
able to blow all over the room.
(3) Leave the space required to service the air conditioner. (Fig. 2)
(4) The ceiling rear height is 250 mm (9-3/8”) or more.
(5) A place from where the air can be distributed evenly throughout the
room by the unit.
(6) A place from where drainage can be extracted outdoors easily.
Fig. 2
Especially, the installation place is very important for the split type air con-
ditioner because it is very difficult to move from place after the first instal-
lation.
Decide the mounting position together with the customer as follows:
The discharge direction can be selected as shown below.
Fig. 1
CAUTION
Since 2-way outlet as shown below causes performance
problems, do not set it.
Strong and durable ceiling
Obstruction
250 mm
(9-3/8”)
or more
1,000 mm (39”)
or more
1,000 mm (39”)
or more
STANDARD PARTS
The following installation parts are furnished. Use them as required.
INDOOR UNIT ACCESSORIES
Name and Shape
Coupler heat insulation
Special nut A (large flange)
Special nut B (small flange)
Template
Remote control unit
Battery (penlight)
Remote control unit holder
Tapping screw (ø3
×
12)
Q’ty
2
4
4
1
1
2
1
2
Application
For indoor side pipe joint
For installing indoor unit
For installing indoor unit
For ceiling hole cutting
Use for air conditioner
operation
For remote control unit
For mounting the remote
control unit
For remote control unit
holder installation
440 mm (17-5/16”)
(Hanging bolt position)
606 mm (23-27/32”)
(
650 mm) (Grille measurement)
(
650 mm (25-15/32”)
(Hanging bolt position)
400 mm (15-3/4”)
66 mm (2-19/32”)
2. Hanging preparations
Firmly fasten the hanging bolts as shown in Fig. 5 or by another method.
Fig. 5
Hanging bolt
M10
Hole-in anchor
Hole-in plug
Concrete
Insert
(5-5/32
”)
131 mm
(4-3/8
”)
111 mm
47 mm (1-27/32
”)
60 mm (2-3/8”)
Drain pipe (I. D. ø32 mm)
600 mm ( 23-5/8”)
(Ceiling opening measurement)
46 mm (1-27/32”)
86 mm (3-3/8”)
250 mm (9-27/32
”)
54 mm (2-1/8
”)
3. Body installation
(1) Install special nut A, then special nut B onto the hanging bolt. (Fig. 7)
(2) Raise the body and mount its hooks onto the hanging bolt between
the special nuts. (Fig. 7)
(3) Turn special nut B to adjust the height of the body. (Fig. 7)
(4) Leveling
Using a level, or vinyl hose filled with water, fine adjust so that the
body is level.
WARNING
Perform final tightening by tightening the double nut firmly.
Fig. 7
Vinyl hose
Special nut A
Special nut B
Hook
Hanging bolt
30 mm
or more
After installing the
body, tighten the nuts.
15 mm (19/32”)
Ceiling
Fig. 8
2
INSTALLING DRAIN PIPE
Note: Install the drain pipe.
•
Install the drain pipe with downward gradient (1/50 to 1/100) and so
there are no rises or traps in the pipe.
•
Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32
mm (1-1/4”)] and connect it with adhesive (polyvinyl chloride) so that
there is no leakage.
•
When the pipe is long, install supporters.
•
Do not perform air bleeding.
•
Always heat insulate the indoor side of the drain pipe.
•
When desiring a high drain pipe height, raise it up to 400 mm (15”) or
less from the ceiling within a range of 150 mm (6”) from the body. A
rise dimension over this range will cause leakage.
Fig. 9
Max. 400 mm (15”)
Rise
Trap
Supporter
1.5 to 2.0 m (5 to 6.5 ft)
Air bleeding
150 mm (6”) or less
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) While welding the pipes, be sure to blow dry nitrogen
gas through them.
(3) The maximum lengths of this product are shown in ta-
ble 2. If the units are further apart than this, correct
operation can not be guaranteed.
1. FLARING
(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. 11
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
L
When bending the pipe, do not
bend it as is. The pipe will be
collapsed. In this case, cut the
heat insulating pipe with a
sharp cutter as shown in Fig.
13, and bend it after exposing
the pipe. After bending the pipe
as you want, be sure to put the
heat insulating pipe back on the
pipe, and secure it with tape.
CAUTION
(1) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 150 mm or
over.
(2) If the pipe is bent repeatedly at the same place, it will
break.
Extend the pipe
by unwinding it.
Fig. 13
Cut line
Pipe
Heat insulating
pipe
Cutter
3. Connection pipes
(1) Indoor unit side
Fig. 14
CAUTION
(1) Be sure to apply the pipe against the port on the in-
door 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.
(2) Do not remove the flare nut from the indoor unit pipe
unit immediately before connecting the connection
pipe.
When the flare nut is tightened properly by your hand, hold the body side
coupling with a separate spanner, then tighten with a torque wrench. (Fig.
15)
Fig. 15
2. Bending pipes
The pipes are snapped by your hands. Be careful not to collapse them.
Fig. 12
Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bent or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or stretch
the pipes more than three times.
Indoor unit
Small pipe
Large pipe
Tighten with two 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.
VACUUM PROCESS
CAUTION
(1) Do not purge the air with refrigerants but use a vacuum
pump to vacuum the installation! There is no extra re-
frigerant in the outdoor unit for air purging!
(2) Use a vacuum pump for R410A exclusively. Using the
same vacuum pump for different refrigerants may dam-
age the vacuum pump or the unit.
1. VACUUM
(1) Remove the cap, and connect the gauge manifold and the vacuum
pump to the charging valve by the service hoses.
(2) Vacuum the indoor unit and the connecting pipes until the pressure
gauge indicates –0.1 MPa (–76 cmHg).
(3) When –0.1 MPa (–76 cmHg) is reached, operate the vacuum pump
for at least 15 minutes.
(4) Disconnect the service hoses and fit the cap to the charging valve to
the specified torque.
(5) Remove the blank caps, and fully open the spindles of the 2-way and
3-way valves with a hexagon wrench (Torque : 6 to 7 N · m (60 to 70
kgf · cm).
(6) Tighten the blank caps of the 2-way valve and 3-way valve to the
specified torque.
5
- Continued on back -
CAUTION
(1) When moving and installing the air conditioner, do not
mix gas other than the specified refrigerant (R410A)
inside the refrigerant cycle.
(2) When charging the refrigerant R410A, always use an
electronic balance for refrigerant charging (to meas-
ure the refrigerant by weight).
(3) 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 composi-
tion is stable.
(4) Add refrigerant from the charging valve after the com-
pletion of the work.
(5) If the units are further apart than the maximum pipe
length, correct operation can not be guaranteed.
3. GAS LEAKAGE INSPECTION
CAUTION
After connecting the piping, check the joints for gas leak-
age with gas leak detector.
Fig. 6
1,000 mm (39”) or more
CONNECTION PIPE REQUIREMENT
Table 2
10 cm (4”)
or more
10 cm (4”)
or more
60 cm (2’)
or more
60 cm (2’)
or more
60 cm (2’)
or more
[12000 and 14000 BTU/h models]
Air
30 cm (1’)
or more
30 cm (1’)
or more
60 cm (2’)
or more
30 cm (1’)
or more
60 cm (2’)
or more
[18000 BTU/h model]
MODEL
Diameter
Maximum length
Maximum Height
(between indoor and outdoor)
Small
Large
12000 BTU/h model
14000 and 18000
BTU/h models
6.35 mm (1/4 in.) 6.35 mm (1/4 in.)
9.52 mm (3/8 in.) 12.70 mm (1/2 in.)
20 m (66 ft)
20 m (66 ft)
8 m (26 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. (Re-
verse 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).
ELECTRICAL REQUIREMENT
•
Electric wire size and fuse capacity:
Table 3
•
Use pipe with water-resistant heat insulation.
•
Always use H07RN-F or equivalent to the connection cord.
•
Install the circuit breaker nearby the units. (Both indoor unit and out-
door unit)
MODEL
Power supply cord
(mm
2
)
Connection cord
(mm
2
)
Fuse capacity (A)
MAX.
MIN.
MAX.
MIN.
12000 and 14000
18000 BTU/h model
BTU/h models
3.0
3.0
2.0
2.5
2.5
2.5
1.5
1.5
15
20
Application
For mounting grille
For mounting grille
For mounting grille
For discharged air
Name and Shape
Bolt
Washer
Spring washer
Blower cover insulation
GRILLE ACCESSORIES
Q’ty
4
4
4
2
OUTDOOR UNIT ACCESSORIES
Application
For outdoor unit drain piping
work
[Heat & Cool model
(Reverse cycle) only]
Q’ty
1
2
1
Name and Shape
Drain pipe
Drain cap
18000 BTU/h model
12000 and 14000
BTU/h models
3
Air flow
Bottom
603 mm (23-23/32”)
Drain pipe mounting hole
Bottom plate
Drain pipe
343 mm (13-1/2
”)
Drain cap
[18000 BTU/h model]
Air flow
Bottom
504 mm (21-1/4”)
Drain pipe mounting hole
Bottom plate
Drain pipe
285 mm (11-7/32
”)
Drain cap
OUTDOOR UNIT
INSTALLATION
•
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 or
two places) other than the drain pipe mounting hole in the bottom of the
outdoor unit with putty so there is no water leakage. (Fig. 10) (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. 10
[12000 and 14000 BTU/h models]
Table 4 Pipe outside diameter
Pipe outside
diameter
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (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
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
0 to 0.5
CAUTION
Be sure to connect the large pipe after connecting the small
pipe completely.
(2) Outdoor unit side
Tighten the flare nut of the connection pipe at the outdoor unit valve
connector. The tightening method is the same as that as at the indoor
side.
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.
9.52 mm (3/8 in.) dia.
12.70 mm (1/2 in.) dia.
Tightening torque
14 to 18 N · m (140 to 180 kgf · cm)
33 to 42 N · m (330 to 420 kgf · cm)
50 to 62 N · m (500 to 620 kgf · cm)
Connecting pipe
Blank cap
Hexagon wrench
3-way valve
Charging port
Cap
Service hose
with valve core
Outdoor unit
Use a 4 mm
hexagon wrench.
Fig. 16
Gauge manifold
Vacuum pump
Service hose
[12000 and 14000 BTU/h models]
CAUTION
Use a clean gauge mani-
fold and charging hose
for R410A exclusively.
Gauge manifold
Vacuum pump
Service hose
[18000 BTU/h model]
t
CAUTION
Use a clean gauge mani-
fold and charging hose
for R410A exclusively.
t
2. Additional charge
Refrigerant suitable for a piping length of 7.5 m is charged in the outdoor
unit at the factory.
When the piping is longer than 7.5 m, additional charging is necessary.
For the additional amount, see the table below.
Table 7
6
INSTALLING THE COUPLER
HEAT INSULATION
After checking for gas leaks, insulate by wrapping insulation around the
two parts (large and small) of the indoor unit coupling, using the coupler
heat insulation.
Fig. 18
CAUTION
Must fit tightly against body without any gap.
Body
Be sure to overlap the
insulation
Coupler heat insulation
No gap
Coupler heat insulation
Table 6
Tightening torque
20 to 25 N · m (200 to 250 kgf · cm)
20 to 25 N · m (200 to 250 kgf · cm)
25 to 30 N · m (250 to 300 kgf · cm)
10 to 12 N · m (100 to 120 kgf · cm)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
Blank cap (2-way valve)
Blank cap
(3-way valve)
Charging port cap
7.5 m
(25 ft)
None
None
12000 and 14000 BTU/h
models
g/m
(oz/ft)
10 m
(33 ft)
25 g
(0.9 oz)
50 g
(1.8 oz)
15 m
(49 ft)
75 g
(2.6 oz)
150 g
(5.3 oz)
20 m
(66 ft)
125 g
(4.4 oz)
250 g
(8.8 oz)
10 g/m
(0.35 oz/3.3 ft)
20 g/m
(0.71 oz/3.3 ft)
Additional
refrigerant
Pipe length
18000 BTU/h model
Fig. 17
