- Continued on back -
Refrigerant
R410A
Cassette Type
Pipe
Pipe
Especially, the installation place is very important for the split type air
conditioner because it is very difficult to move from place to place after the
first installation.
Decide the mounting position together with the customer as follows:
The discharge direction can be selected as shown below.
CAUTION
Since 2-way outlet as shown below causes performance
problems, do not set it.
(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)
100 mm (4") or more
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.
(4) The ceiling rear height as shown in figure.
(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.
(7) Install the unit where noise and vibrations are not amplified.
Obstruction
Strong and durable ceiling
2,400 mm (94")
or more
1,000 mm (39")
or more
1,000 mm (39")
or more
Floor
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
Blower cover insulation
Hook wire
Binder (small)
Remote
controller
Tapping screw
(flush heads)
Remote controller cord
Q’ty
2
4
4
1
2
2
Application
For indoor side pipe joint
For installing indoor unit
For installing indoor unit
For ceiling hole cutting
For discharged air
For installing intake grille.
For fixing the remote
controller cord
For installing the remote
controller
For connecting the remote
controller
1
1
2
1
1
INSTALLATION PROCEDURE
Install the air conditioner as follows:
INDOOR UNIT INSTALLATION
WARNING
●
Install the air conditioner in a location which can with-
stand a load do at least five times the weight of the
main unit and which will not amplify sound or vibra-
tion. If the installation location is not strong enough,
the indoor unit may fall and cause injuries.
●
If the job is done with the panel frame only, there is a
risk that the unit will come loose. Please take care.
REMOVING THE INTAKE GRILLE
(1) Push the intake grille pushbuttons (two places).
(2) Open the intake grille.
OPEN
PUSH
(3) Remove the grille hinge wire.
A
•
Pull up while pressing the B section.
Part A detail view
Part A section view
B
(4) Remove the intake grille.
REMOVING THE PANEL FRAME
•
Pull up the corner sections (A) of the panel frame as shown in
figure (4 locations).
Part A detail view
Grille hinge wire
A
A
A
A
B
•
Pull up in the direction of the arrow while holding down the C
section of figure (4 locations).
Part B detail view
Panel base
C
Panel frame
CAUTION
Always remove the panel frame after removing the intake
grille.
1. POSITION THE CEILING HOLE AND HANGING
BOLTS
940 mm ( 37")
890 mm ( 35-3/64")
750 mm (29-17/32")
750 mm (29-17/32")
Hanging bolt M10
(A) Standard setting
Hole-in anchor
Hole-in plug
Concrete
Insert
Drain pipe (I.D. 32 mm)
60 mm
(2-3/8")
305.5 mm (12")
298.5 mm (11-3/4")
(2-3/4")
248.5 mm
(9-25/32")
70 mm
(3-15/16")
(5")
100 mm
127 mm
235 mm (9-1/4") [18 to 24 type]
285 mm (11-7/32") [30 to 54 type]
(B) Slender setting
Drain pipe (I.D. 32 mm)
60 mm
(2-3/8")
305.5 mm (12")
298.5 mm (11-3/4")
248.5 mm
(9-25/32")
70 mm
(2-3/4")
(3-15/16")
(3-5/8")
100 mm
92 mm
200 mm (7-7/8") [18 to 24 type]
250 mm (9-27/32") [30 to 54 type]
3. BODY INSTALLATION
As for the dimension of the ceiling rear hight is above figure or more.
(1) Install special nut A, then special nut B onto the hanging bolt.
(2) Raise the body and mount its hooks onto the hanging bolt between
the special nuts.
(3) Turn special nut B to adjust the height of the body.
(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.
* Must fit tightly against ceiling
without any gap.
Special nut B
Hanging bolt
Special nut A
30 mm (1-3/16")
or more
Hook
Ceiling
After installing the body,
tighten the nuts.
* Allowable space between the unit and the ceiling 5 mm (3/16") or less
INSTALLING THE PANEL FRAME
Vinyl hose
* With slender setting, turn the panel frame 90° as shown in the dia-
gram above.
Grille setting method has been changed at the marked posi-
tions on the panel frame and panel base.
(A) Standard setting
(B) Slender setting
(Example)
Panel base
Panel frame
*90° Turn
Mark
Panel frame
No mark
2. HANGING PREPARATIONS
•
Firmly fasten the hanging bolts as shown in figure or by another method.
•
Install the hanging bolts at a place where they would be capable of
holding a weight of at least 50 kgf per bolt.
2
INSTALLING DRAIN PIPE
CAUTION
Install the drain pipe in accordance with the instructions
in this installation instruction sheet and keep the area warm
enough to prevent condensation. Problems with the pip-
ing may lead to water leaks.
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, rise it up to 800 mm (31") or
less from the ceiling within a range of 150 mm (6") from the body. A
rise dimension over this range will cause leakage.
Max. 800 mm (31")
Rise
Trap
Supporter
1.5 to 2.0 m (5 to 6.5 ft)
Air bleeding
150 mm (6") or less
3
CONNECTING THE PIPING
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.
Do not remove the cap from the connection pipe before connecting
the pipe.
CAUTION
Be sure to connect the large pipe after connecting the small
pipe completely.
(Hanging bolt position)
(Grille measurement)
(Hanging bolt position)
(Ceiling opening measurement)
SELECTING THE MOUNTING POSITION
4
Body
Be sure to overlap the
insulation
Coupler heat insulation
No gap
Coupler heat insulation
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.
After installing the coupler heat insulation, wrap both ends with vinyl tape
so that there is no gap.
CAUTION
Must fit tightly against body without any gap.
WARNING
Install at a place that can withstand the weight of the in-
door 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.
SPLIT TYPE AIR CONDITIONER
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9370937022)
(B) Slender setting
(A) Standard setting
215 mm (8-15/32")
or more
250 mm (9-27/32")
or more
This mechanism enables the cassette body to move 35 mm (1-3/8")
downward and realizes installation to the space of 215 or 265 mm
(8-15/32" or 10-15/32"). No special works and option is needed.
You can select 2-way setting
[18 to 24 type]
(B) Slender setting
(A) Standard setting
265 mm (10-15/32")
or more
300 mm (11-13/16")
or more
[30 to 54 type]
CONNECTION PIPE REQUIREMENT
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 248 °F. (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 (19/32") or thicker and if the expected humidity
exceeds 80%, use heat insulation that is 20 mm (3/4") 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 68 °F).
ELECTRICAL REQUIREMENT
•••••
Install all electrical works in accordance to the standard.
•••••
Install the disconnect device with a contact gap of at least 3 mm (1/8")
in all poles nearby the units. (Both indoor unit and outdoor unit)
•••••
Install the circuit breaker nearby the units.
•••••
Use pipe with water-resistant heat insulation.
Connection cord (mm
2
)
MAX.
MIN.
2.5
1.5
•••••
Electric wire size:
IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to
install or service the system so it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
•
Carefully read this instruction booklet before beginning.
•
Follow each installation or repair step exactly as shown.
•
Observe all local, state, and national electrical codes.
•
Pay close attention to all danger, warning, and caution notices given in
this manual.
This symbol refers to a hazard or unsafe practice which
can result in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which
can result in personal injury and the potential for
product or property damage.
•
Hazel alerting symbols
Electrical
Safety / alert
If Necessary, Get Help
These instructions are all you need for most installation sites and mainte-
nance conditions. If you require help for a special problem, contact our
sales/service outlet or your certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation
or maintenance service, including failure to follow the instructions in this
document.
SPECIAL PRECAUTIONS
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR
DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD
ATTEMPT TO WIRE THIS SYSTEM.
•
Do not supply power to the unit until all wiring and tubing are completed
or reconnected and checked.
•
Highly dangerous electrical voltages are used in this system. Carefully
refer to the wiring diagram and these instructions when wiring. Improper
connections and inadequate grounding can cause accidental injury or
death.
•
Ground the unit following local electrical codes.
•
Connect all wiring tightly. Loose wiring may cause overheating at con-
nection points and a possible fire hazard.
WARNING:
CAUTION:
When Transporting
Be careful when picking up and moving the indoor and outdoor units. Get
a partner to help, and bend your knees when lifting to reduce strain on
your back. Sharp edges or thin aluminum fins on the air conditioner can
cut your fingers.
When Installing...
...In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit’s weight. It
may be necessary to construct a strong wood or metal frame to provide
added support.
...In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that
can cause dripping and water damage to walls and floors.
...In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the outdoor unit. This prevents water damage and abnor-
mal vibration.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting
snow. Provide snow vents.
When Connecting Refrigerant Tubing
•
Keep all tubing runs as short as possible.
•
Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces of the flare and
union tubes before connecting them, then tighten the nut with a torque
wrench for a leak-free connection.
•
Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may be either narrow
or wide. Therefore, to avoid confusion the refrigerant tubing for your
particular model is specified as either “small” or “large” rather than as
“liquid” or “gas”.
When Servicing
•
Turn the power OFF at the main circuit breaker panel before opening
the unit to check or repair electrical parts and wiring.
•
Keep your fingers and clothing away from any moving parts.
•
Clean up the site after you finish, remembering to check that no metal
scraps or bits of wiring have been left inside the unit being serviced.
•
After installation, explain correct operation to the customer, using the
operating manual.
This air conditioner uses new refrigerant HFC (R410A).
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 instal-
lation 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 con-
ventional 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 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 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
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
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
conventional refrigerant, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in the table. Never
use copper pipes thinner than that in the table even when it is available on
the market.
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
0.80 mm (0.0315 in.)
0.80 mm (0.0315 in.)
0.80 mm (0.0315 in.)
1.00 mm (0.0394 in.)
Pipe outside diameter
Thickness
Thicknesses of Annealed Copper Pipes (R410A)
CAUTION
This installation instruction sheet describes how to install the indoor unit only.
To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.
GENERAL
This INSTALLATION INSTRUCTION SHEET briefly outlines where and
how to install the air conditioning system. Please read over the entire set
of instructions for the indoor and outdoor units and make sure all acces-
sory parts listed are with the system before beginning.
* Appearance of slender setting
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 flare tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
B
Die
A
Pipe
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
0 to 0.5 mm
(0 to 0.0197 in.)
Pipe outside diameter
Dimension A
Flare tool for R410A, clutch type
Width across flats
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
9.1 mm (0.3583 in.)
13.2 mm (0.5197 in.)
16.6 mm (0.6536 in.)
19.7 mm (0.7756 in.)
Pipe outside diameter
Dimension B
When using conventional flare tools to flare R410A pipes, the dimension
A should be approximately 0.5 mm (1/32") more than indicated in the
table (for flaring with R410A flare tools) to achieve the specified flaring.
Use a thickness gauge to measure the dimension A.
Pipe outside
diameter
Width across flats
of Flare nut
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
17 mm (0.6693 in.)
22 mm (0.8661 in.)
26 mm (1.0236 in.)
29 mm (1.1417 in.)
CAUTION
1
To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 150 mm (6")
or over.
2
If the pipe is bent repeatedly at the same place, it will
break.
The pipes are shaped by your hands. Be careful not to collapse them.
Do not bend the pipes in an angle more than 90
°.
When pipes are repeatedly bend 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.
2. BENDING PIPES
To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
(3) When the flare nut is tightened properly by your hand, use a torque
wrench to finally tighten it.
Holding spanner
Body side
Indoor unit
Connection pipe
(Liquid)
Connection pipe
(Gas)
(2) Centering the pipe against port on the indoor unit, turn the flare nut
with your hand.
3. CONNECTION PIPES
Indoor unit
(1) Detach the caps and plugs from the pipes.
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
until immediately before connecting the connection pipe.
Torque wrench
CAUTION
Hold the torque wrench at its grip, keeping it in the right
angle with the pipe, in order to tighten the flare nut
correctly.
Flare nut
Tightening torque
6.35 mm (1/4 in.) dia.
9.52 mm (3/8 in.) dia.
12.70 mm (1/2 in.) dia.
15.88 mm (5/8 in.) dia.
16 to 18 N·m (160 to 180 kgf·cm)
30 to 42 N·m (300 to 420 kgf·cm)
49 to 61 N·m (490 to 610 kgf·cm)
63 to 75 N·m (630 to 750 kgf·cm)
14000, 18000 BTU/h
24000, 36000,
model
42000 BTU/h model
MODEL
Diameter
Liquid
Gas
6.35 mm (1/4 in.) 9.52 mm (3/8 in.)
12.70 mm (1/2 in.) 15.88 mm (5/8 in.)
9370937022_IM_front.p65
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