Page 1
SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION MANUAL
(P/N 9379069052-03)
English
Connect all wiring tightly. Loose wiring may cause overheating at con-
IMPORTANT!
nection points and a possible fi re hazard.
The following installation accessories are supplied. Use them as
required.
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 effi ciently.
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.
WARNING: This symbol refers to a hazard or unsafe practice which
CAUTION: This symbol refers to a hazard or unsafe practice which
Hazel alerting symbols
Electrical
Safety / alert
If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our
sales/service outlet or your certifi ed 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.
can result in severe personal injury or death.
can result in personal injury and the potential for product or property damage.
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 com-
pleted or reconnected and checked.
Highly dangerous electrical voltages are used in this system. Care-
fully refer to the wiring diagram and these instructions when wiring.
Improper connections and inadequate grounding can cause acciden-
tal injury or death.
Ground the unit following local electrical codes.
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 fi ns on the air conditioner can cut your fi ngers.
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 fl oors.
...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 abnormal vibration.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffl e.
...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 fl are method for connecting tubing.
Apply refrigerant lubricant to the matching surfaces of the fl are 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 specifi ed as either “small” or “large” rather
than as “liquid” or “gas”.
When Servicing
Turn the power OFF at the main circuit breaker panel before open-
ing the unit to check or repair electrical parts and wiring.
Keep your fi ngers 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.
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) mod-
(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent
(3)
(4)
Special tools for R410A
Page 2
STANDARD ACCESSORIES
The following installation accessories are supplied. Use them as
required.
Name and Shape
Installation Manual
(This manual)
Q’ty
1
Name and Shape
Drain pipe
Q’ty
1
ELECTRICAL REQUIREMENT
Always make the air conditioner power supply a special branch circuit and
provide a special switch and receptacle. Do not extend the power cord
Always select the size that corresponds to the capacity of the breaker to the size of the power cord.
CAUTION
12000 BTU/h
MINIMUM CIRCUIT AMPACITY 12 A
.
MAXIMUM OVERCURRENT PROTECTION
(TIME DELAY FUSE OR HACR TYPE CIRCUIT BREAKER)
20 A
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) mod-
els, 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 fl are nuts with the R410A piping and fl are 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 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 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.
Special tools for R410A
Tool name
Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous
Gauge manifold
Charge hose
Vacuum pump
Gas leakage detector
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 (30 in.Hg to 768 psi) for high pressure.
-0.1 to 3.8 MPa (30 in.Hg to 551 psi) 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.
Contents of change
Page 3
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
(0.004 oz/100 ft.). 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
Thicknesses of Annealed Copper Pipes
Thickness (mm (in.))
Nominal diam-
eter (in.)
1/4
3/8
Outer diameter
(mm)
6.35
9.52
R410A
0.80 (0.032)
0.80 (0.032)
[ref.] R22
0.80 (0.032)
0.80 (0.032)
when using R22, 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
(0.032 in.) even when it is available on the market.
WARNING
(1) Do not use the existing (for R22) piping and fl are 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) When installing and relocating the air conditioner, do not mix gases other than the specifi ed 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.
CAUTION
When installing pipes shorter than 10 ft (3 m), sound of the outdoor unit will be transferred to the indoor unit, which
will cause large operating sound or some abnormal sound.
Decide the mounting position with the customer as follows:
(1)
(2)
(3) Do not install the unit where people pass.
(4) Take your neighbors into consideration so that they are not disturbed
(5)
Also for effi cient operation, leave open three of the four directions
(2) Do not install near heat sources.
(3) If children under 10 years old may approach the unit, take
For authorized service personnel only.
WARNING
(1) For the room air conditioner to operate satisfactory, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This
installation manual describes the correct connections using the standard accessories and the parts specifi ed in this
installation manual.
(3) Have installation work done by authorized service personnel only.
(4) Do not use an extension cord.
(5) Do not turn on the power until all installation work is complete.
CAUTION
This installation manual describes how to intall the outdoor unit only.
To install the indoor unit, refer to the installation manual included with the indoor unit.
● 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 manual because it is used when the air conditioner is serviced or moved.
● The maximum length of the piping is 66 ft (20 m). The maximum height difference of the piping is 49 ft (15 m),
if the units are further apart than these, correct operation can not be guaranteed.
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.
Connector cover removal
●
Remove the tapping screw.
Installing the connector cover
(1) After inserting the four hooks, then push upward.
(2) Tighten the tapping screw.
Hook
Tapping screw
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.
.
Always use the screws as shown above.
Hooks
Connector cover
Page 4
1
SELECTING THE MOUNTING
POSITION
Decide the mounting position with the customer as follows:
(1)
If possible, do not install the unit where it will be exposed to direct sunlight.
(If necessary, install a blind that does not interfere with the air fl ow.)
(2)
Do not install the unit where a strong wind blows or where it is very dusty
(3) Do not install the unit where people pass.
(4) Take your neighbors into consideration so that they are not disturbed
by air blowing into their windows or by noise.
(5)
Provide the space shown in the fi gure so that the air fl ow is not
blocked
Also for effi cient operation, leave open three of the four directions
Install at a place that can withstand the weight of the
outdoor units and install positively so that the units will
not topple or fall.
(1) Do not install where there is the danger of combustible gas
(2) Do not install near heat sources.
(3) If children under 10 years old may approach the unit, take
.
front, rear, and both sides.
WARNING
CAUTION
leakage.
preventive measures so that they cannot reach the unit.
INSTALLATION DIAGRAM OF
OUTDOOR UNIT
INDOOR UNIT
Connection Cord
.
14AWG
[OUTDOOR UNIT]
24” (60 cm) or over
4” (10 cm) or over
8” (20 cm) or over
• Do not directly install it on
the ground, otherwise it
will cause failure.
• To obtain better operation
efficiency, when the outdoor
unit is installed, be sure to
open the front and left side.
2” (5 cm) or over
4” (10 cm)
or over
10” (25 cm)
or over
POWER
WARNING
(1) The rated voltage of this product is 208/230 V AC 60 Hz.
(2) Before turning on the power, check if the voltage is within the
208 V -10 % to 230 V +10 % range.
(3) Always use a special branch circuit and install a special r eceptacle
to supply power to the room air conditioner.
(4) Use a circuit breaker and receptacle matched to the capacity of
the air conditioner.
Outdoor unit bottom
Drain hose
CAUTION
(1)
When the outdoor temperature is 32 ° F (0 ° C) or less, do not use the accessor y
drain pipe and drain cap. If the drain pipe and dr ain cap are used, the drain w ater
in the pipe may freeze in extremety cold weather. (Reverse cycle model only)
(2) In the area with heavy snowfall, if the intake and outlet of outdoor unit is
blocked with snow, it might become diffi cult to get warm and it is likely
to because of the breakdown. Please construct a canopy and a pedesta or
place the unit on a high stand (local confi gured).
21-9/32 “ (54 cm)
1113/32”(29 cm)
(5) Do not extend the power cable.
(6) Perform wiring work in accordance with standards so that the
air conditioner can be operated safely and positively.
(7) Install a leakage circuit breaker in accordance with the related
laws and regulations and electric company standards.
.
(1) The power source capacity must be the sum of the air conditioner current and the current of other electrical appliances. When the cur-
rent contracted capacity is insuffi cient, change the contracted capacity.
(2) When the voltage is low and the air conditioner is diffi cult to start, contact the power company the voltage raised.
2
CAUTION
Installation instruction on the back.
Page 5
OUTDOOR UNIT WIRING
(1) Remove the screws, then remove the control box cover.
(2) Fasten the Inter-unit wire harness and power supply to the conduit holder using the lock nut.
(3) Connect inter-unit wire harness and power supply to the terminal.
(4) Use the screws to install the control box cover.
WARNING
Be sure to comply with local codes while r unning the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).
Every wire must be connected fi rmly.
No wire should be allowed to touch refrigerant tubing, the compres-
sor or any moving part.
Loose wiring may cause the terminal to overheat or result in unit
malfunction. A fi re hazard may also exist. Therefore, be sure all wiring
is tightly connected.
Connect wires to the matching numbers of terminals.
Indoor unit
Terminal
Earth
Screw
G
3
2
1
DISCONNECT
SWITCH (FIELD
SUPPLY)
G
12
Grounding line
Control line
(Inter Unit)
Power line
3
Connection cord
208/230 V
208/230 V
208/230 V
Outdoor unit
Terminal
G
L2
L1
3
2
1
terminal block
POWER SUPPLY
Single-prase, 208/230V
L1 L2
12
3
Power supply line
Lock nut
Earth Screw
G
NOTE:
• Connector trade size for this unit is 1/2”(12.7 mm). The connector can be bought at a hard ware store. Refer to “How
to connect wiring to the terminals“ for instructions on connecting depending on the wire type you are using.
• The fuse located in the outdoor unit provides power supply
protection and may blow when power is applied if the system
has been in correctly wired.
Control box cover
Inter-unit wire
harness
Power supply
Inter-unit wire
hamess
CAUTION
(1) Match the terminal block numbers and connection cor d
colors with those of the indoor unit.
Erroneous wiring may cause burning of the electric
parts
.
(2) Connect the connection cords fi rmly to the terminal block.
Imperfect installation may cause a fi re.
(3) Always fasten the outside covering of the connection
cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)
(4) Securely earth the power cord.
(5) Do not use the earth screw for an external connector.
Only use for interconnection between two units.
PUMP DOWN OPERATION (FORCED COOLING OPERATION)
To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrigerant by doing the cooling operation or
forced cooling operation according to the following procedure. (When the cooling operation cannot start in winter, and so on, start the forced
cooling operation.)
(1) Do the air purging of the charge hose by connecting the charging hose of gauge manifold to the charging port of 3 way valve and opening
the low-pressure valve slightly.
(2) Close the valve stem of 2 way valve completely.
(3) Start the cooling operation or following forced cooling operation.
Keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds.
The operation indicator lamp and timer indicator lamp will begin to fl ash simultaneously during test run.
(The forced cooling operation cannot start if the MANUAL AUTO button is not kept on pressing for more than 10 seconds.)
(4) Close the valve stem of 3 way valve when the reading on the compound pressure gage becomes 0.05~0 MPa (7.25~0 psi).
(5) Stop the operation.
• Press the START/STOP button of the remote control unit to stop the operation.
• Press the MANUAL AUTO button when stopping the operation from indoor unit side.
(It is not necessary to press on keeping for more than 10 seconds.)
CAUTION
During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2 way or 3 way valve open. This may cause abnormal
pressure in the refrigeration cycle that leads to breakage and even injury.
OPERATING RANGE
Cooling/Dry Mode Heating Mode
Outdoor temperature About 14 to 115 °F About 5 to 75 °F
Page 6
CONNECTING THE PIPING
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installation set
or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the fl are surface and tightening the nut hand
tight, tighten the nut to the specifi ed tightening torque with a torque wrench.
(Table 1)
FLARING
(1) Cut the connection pipe to the necessary
length with a pipe cutter.
(2) Hold the pipe downw ard so that cuttings will
not enter the pipe and remove the burrs.
(3) Insert the fl are nut onto the pipe and fl are
the pipe with a fl aring tool.
Insert the fl are nut (always use the fl are nut
attached to the indoor and outdoor units respectively) onto the pipe and perform the fl are
processing with a fl are tool.
Use the special R410A fl are tool, or the conventional (for R22) fl are tool.
When using the conventional fl are tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 2 .
BENDING PIPES
(1) When bending the pipe, be careful not to crush it.
(2) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 2-13/16° (70mm) or
over.
If the copper pipe is bend the pipe or pulled to often, it will become stiff.
(3)
Do not bend the pipes more than three times at one place.
Check if [L] is fl ared uniformly
and is not cracked or scratched.
Die
A
Pipe
Tighten with two wrenches.
Wrench (fi xed)
Torque
wrench
Indoor unit pipe
Flare nut
Connection pipe
To prevent gas leakage, coat the fl are
surface with refrigerator oil.
Table 1 Flare nut tightening torque
Flare nut
1/4” (6.35 mm) dia.
3/8” (9.52 mm) dia.
16 to 18 (11.8 to 13.3)
32 to 42 (23.6 to 31.0)
Tightening torque [N·m (lbt·ft)]
Table 2 Pipe outside diameter
Pipe outside
diameter
1/4” (6.35 mm)
3/8” (9.52 mm)
Flare tool for
R410A, clutch type
0 to 1/32 (0 to 0.5)
0 to 1/32 (0 to 0.5)
A [in (mm)]
Conventional (R22) fl are tool
Clutch type
1/32 to 2/32 (0.5 to 1 .5)
1/32 to 2/32 (0.5 to 1 .5)
CAUTION
(1) Fasten a fl are nut with a torque wrench as instructed in this manual. If
fastened too tight, the fl are nut may be broken after a long period of time
and cause a leakage of refrigerant.
(2) During installation, make sure that the refrigerant pipe is attached fi rmly
before you run the compressor. Do not operate the compressor under the
condition of refrigerant piping not attached properly with 2-way or 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
Wing nut type
2/32 to 3/32 (1 .5 to 2.0)
2/32 to 3/32 (1 .5 to 2.0)
AIR PURGE
Always use a vacuum pump to purge the air.
Refriger ant f or purging the air is not c harg ed in the
outdoor unit at the factory.
Close the high pressure side valve of the gauge manifold fully and do
not operate it during the following work.
1. Check if the piping connections are secure.
2. Check that the stems of 2-way valve and 3-way valve are closed fully.
3. Connect the gauge manifold charge hose to the charging port of the
3-way valve (side with the projection for pushing in the valve core).
4. Open the low pressure side valve of the gauge manifold fully.
5. Operate the vacuum pump and start pump down.
6. Slowly loosen the fl are nut of the 3-way valve and check if air enters,
then retighten the fl are nut.
(When the fl are nut is loosened the operating sound of the vacuum
pump changes and the reading of the compound pressure gauge goes
from minus to zero.)
7. Pump down the system for at least 15 minutes, then check if the compound
pressure gauge reads -0.1 MPa (30 in.Hg ).
8. At the end of pump down, close the low pressure side gauge of the gauge
manifold fully and stop the vacuum pump.
9.
Slowly loosen the valve stem of the 3-way valve. When the compound pressure gauge reading reaches 0.1-0.2 MPa (14.5~28.9 psi), retighten the valve
stem and disconnect the charge hose from the 3-way valve charging port.
(If the stem of the 3-way valve is opened fully before the charge hose
is disconnected, it may be diffi cult to disconnect the charge hose.)
CAUTION
(1)
Refrigerant must not be discharged into atmosphere.
(2) After connecting the piping , check the joints for gas
leakage with gas leak detector.
10. Fully open the valve stems of the 2-way valve and 3-way valve using a hexagon
wrench. (After the valve stem begins to turn, turn it with a torque of less than
2.9 N • m (30 kgf • cm) until it stops turning.)
11. Firmly tighten the 2-way valve and 3-way valve blank cap and the charging port cap.
Compound pressure gauge
3-way valve
Charging port cap
2-way valve
Flare nut
Valve stem
Blank cap
Charging port
Tightening torque [N·m (lbt·ft)]
Blank cap 20 to 25 (14.8 to 18.4)
Charging port cap 10 to 12 (7.4 to 8.8)
Gauge manifold
-0.1 MPa
(30 in.Hg )
Low prossure
side valve
Charge hose
Pressure gauge
High
pressure
side valve
(closod)
Charge
hose
Vacuum pump
Additional charge
Refrigerant suitable for a piping length of 49 ft (15 m) is charged in the
outdoor unit at the factory.
When the piping is longer than 49 ft (15 m), additional charging is necessary.
For the additional amount, see the table below.
Pipe length
Additional refrigerant
3
49 ft (15 m)
None
66 ft (20 m)
+3.5 oz (+100 g)
Rate
0.2 oz/ft (20 g/m)
CAUTION
(1)
When adding refrigerant, add the refrigerant from the
charging port at the completion of work.
(2) The maximum length of the piping is 66 ft (20 m). If
the units are further apart than this, corr ect operation
can not be guaranteed.
Between 49 ft (15 m) and 66 ft (20 m), when using a connection pipe other than that
in the table, charge additional refrigerant with 0.2 oz/ft (20 g/m) as the criteria.
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