General AOH19FA, ASH9FMAD, AOH19FSAB2, AOH19FB, ASH9FMBD Installation Manual
...
UNIT B
7000 BTU
UNIT A
12000 BTU
a
b
H
H
H
AIR
MULTI TYPE ROOM AIR CONDITIONER
UNIT B
UNIT A
a
b
H
H
H
UNIT B2
UNIT B1
UNIT A
a
b2
b1
H
H
H
INSTALLATION INSTRUCTION
SHEET
(PART NO. 9375301019)
WARNING
CAUTION
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 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 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 conventional 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
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 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 even when it is available on the market.
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 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.
This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of
the user.
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).
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
–0.1 to 3.8 MPa (–76 cmHg to 38 kgf/cm
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.
WARNING
Contents of change
2
2
) for low pressure.
) for high pressure.
Table 1 Thicknesses of Annealed Copper Pipes
Nominal
diameter (inch)
1/4
3/8
Outer diameter
(mm)
6.35
9.52
Thickness (mm)
0.80
0.80
STANDARD ACCESSORIES
The following installation accessories are supplied. Use them as required.
INDOOR UNIT ACCESSORIES (Wall Mounted type)
Name and Shape
Wall hook bracket
Remote
control unit
Battery (penlight)
Remote control
unit holder
Cloth tape
Tapping screw (big)
(ø4 x 25)
Tapping screw (small)
(ø3 x 12)
Q’ty
For indoor unit installation
1
Use for air conditioner operation
1
For remote control unit
2
Use as remote control unit holder
1
For indoor unit installation
1
For wall hook bracket
installation
8
For remote control unit holder
installation
2
OUTDOOR UNIT ACCESSORIES
Name and Shape
Putty
Drain pipe
(Heat & Cool model
(Reverse cycle) only)
Drain cap
(Heat & Cool model
(Reverse cycle) only)
This installation manual refers to following installation parts.
Q’ty
For sealing
1
For outdoor unit drain piping work
1
For outdoor unit drain piping work
2
2 ROOMS MULTI MODEL
Connection pipe assembly 2
Connection cord (3-conductor + earth) 2
Wall pipe 2
Decorative tape 2
Vinyl tape 2
Wall cap 2
Saddle 2 sets
Drain hose 2
Tapping screws 2 sets
Sealant 2
Power supply cord 1
Name Q’ty
Use
Use
3 ROOMS MULTI MODEL
Connection pipe assembly 3
Connection cord (3-conductor + earth) 3
Wall pipe 3
Decorative tape 3
Vinyl tape 3
Wall cap 3
Saddle 3 sets
Drain hose 3
Tapping screws 3 sets
Sealant 3
Power supply cord 1
Name Q’ty
ELECTRICAL REQUIREMENT
• Use conformed cord with Type 245 IEC57.
• Electric wire size and fuse capacity:
Power supply cord (mm2)
Connection cord (mm
Breaker capacity (A) 20
••
• Install the disconnect device with a contact gap of at least 3 mm nearby
••
the units.
••
• Always make the air conditioner power supply a special branch circuit
••
and provide a special breaker.
MAX. 3.0
MIN. 2.5
MAX. 2.5
2
)
MIN. 1.5
CONNECTION PIPE
REQUIREMENTS
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 expected 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 “5 CONNECTING THE PIPING” in this installation instruction sheet.
Model All models
Diameter
Small 6.35 mm (1/4 in.)
Large 9.52 mm (3/8 in.)
SYSTEM LAYOUT
Layout example for the indoor units and outdoor unit
12000 + 12000 BTU or 9000 + 9000 BTU MODEL
Power source
220-240 V ~ 50 Hz
Circuit breaker
OUTDOOR UNIT
12000 + 7000 BTU MODEL
Power source
220-240 V ~ 50 Hz
Circuit breaker
OUTDOOR UNIT
When connecting indoor units with different outputs (7000
and 12000 BTU) to the outdoor unit, connect the 12000 BTU
indoor unit to the unit A connection port and the 7000 BTU
indoor unit to the unit B connection port.
3 ROOMS MULTI MODEL
Power source
220-240 V ~ 50 Hz
Circuit breaker
OUTDOOR UNIT
Power supply cord
Connection cord
Refrigerant pipe
INDOOR UNITS
Power supply cord
Connection cord
Refrigerant pipe
INDOOR UNITS
CAUTION
Power supply cord
Connection cord
Refrigerant pipe
INDOOR UNITS
LIMITATION OF REFRIGERANT PIPING LENGTH
CAUTION
The maximum pipe lengths and height difference of this
product are shown in the table.
If the units are further apart than this, correct operation
cannot be guaranteed.
2 ROOMS MULTI MODEL
Total max length (a+b)
Max length for each indoor unit (a or b)
Max height difference (H)
*1 If the piping length for each indoor unit is 7.5 m or longer, additional
refrigerant charging is necessary. (For more information, refer to
“8 ADDITIONAL CHARGE”.)
3 ROOMS MULTI MODEL
Total max length (a+b1+b2)
Total max length (b1+b2)
Max length for each indoor unit (a, b1 or b2)
Max height difference (H)
*2 If the total piping length (b1+b2) is 15 m or longer, additional refrigerant
charging is necessary.
If the piping length for indoor unit A is 7.5 m or longer, additional
refrigerant charging is necessary. (For more information, refer to
“8 ADDITIONAL CHARGE”.)
30 m (98 ft)
15 m (49 ft)
8 m (26 ft)
35 m (115 ft)
20 m (66 ft)
15 m (49 ft)
5 m (16 ft)
*1
*2
*2
INSTALLATION PROCEDURE
1
OUTDOOR UNIT PROCESSING
(1) Outdoor unit to be fasten with bolts at the four places indicated by the
arrows without fail.
Bottom side
Drain pipe
mounting place
(2) Fix securely with bolts on a solid block. (Use 4 sets of commercially
available M10 bolt, nut and washer.)
(3) Since the drain water flows out of the outdoor unit during heating
operation, install the drain pipe and connect it to a commercial 16 mm
hose. (Reverse cycle model only)
(4) When installing the drain pipe, plug all the holes other than the drain
pipe mounting hole in the bottom of the outdoor unit with putty so
there is no water leakage. (Reverse cycle model only)
When the outdoor temperature is 0 °C or less, 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. (Reverse cycle model
only)
OUTDOOR UNIT
INSTALLATION
Drain cap
mounting place
650 mm
Bolt
Nut
CAUTION
Drain pipe mounting hole
Drain pipe
370 mm
4-ø 12 hole
Block
Base
Outdoor unit connection cord and pipe connection
preparations:
Remove outdoor unit valve cover.
* After removing the screws,
remove valve cover.
Valve cover
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 cords 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 Also, do not use an extension cord.
5 Do not turn on the power until all installation work is complete.
6 Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
7 There is not extra refrigerant in the outdoor unit for air purging.
8 Use a vacuum pump for R410A exclusively.
9 Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.
: Use a clean gauge manifold and charging hose for R410A exclusively.
A 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.
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:
1. 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
(Fig. 1). Also install the unit where the filter can be removed.
Fig. 1
Left side
5 cm
or over
150 cm
or over
6 cm or over
230 cm or over
Right
side
5 cm
or
over
2. OUTDOOR UNIT
WARNING
11
1 Install the unit where it will not be tilted by more than 3˚. However, do not install the unit with it tilted towards the side
11
containing the compressor.
22
2 When installing the outdoor unit where it may exposed to strong wind, fasten it securely.
22
Decide the mounting position with the customer as follows:
(1) Install the outdoor unit in a location which can withstand the weight of the unit and vibration, and which can install horizontally.
(2) Provide the indicated space to ensure good airflow.
(3) 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 airflow.)
(4) Do not install the unit near a source of heat, steam, or flammable gas.
(5) 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)
(6) Do not install the unit where strong wind blows or where it is very dusty.
(7) Do not install the unit where people pass.
(8) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as much as possible.
(9) Install the unit where connection to the indoor unit is easy.
••
• When there are obstacles at the back side.
••
100 mm
or more
••
• When there are obstacles at the back, side(s), and top.
••
600-1000 mm*
100-300 mm*
250 mm or more
(Service space)
If the space is larger than that is stated, the condition will be the
*
same as that there are no obstacles.
300 mm
or more
••
• When there are obstacles at the back and front sides.
••
100 mm
or more
600 mm
or more
••
• When there are obstacles at the back side with the installation of
••
more than one unit.
250 mm
or more
250 mm
or more
300 mm
or more
2
2 Right
INDOOR UNIT INSTALLATION
The piping can be connected in the five directions indicated by 1, 2, 3,
4, and 5. When the piping is connected in direction 2 or 5, cut along
the piping groove in the side of the front cover with a hacksaw. When
connecting the piping in direction 3, cut a notch in the thin wall at the front
bottom of front cover.
(Rear)
outlet
1 Rear outlet
3 Bottom outlet
4 Left rear
1. INSTALLING THE WALL HOOK BRACKET
CAUTION
Install the wall hook bracket horizontally and perpendicularly. If the wall hook bracket is tilted, water will drip to the
floor.
Install the wall hook bracket so that it is strong enough to withstand the
weight of an adult.
[Installation directly to a wall]
Before fastening the wall hook bracket to the wall with the screws, level it
by tapping the hook at the center of bracket to the wall with the handle of
a screwdriver.
• Fasten the wall hook bracket to the wall with 6 or more screws through
the holes near the outer edge of the bracket.
• Check that there is no rattle at the wall hook bracket.
Wall hook
bracket
Tapping screw (big)
Tapped
Hook
(Handle of screwdriver)
Center notch
Hook
Wall hook
bracket
String
Counter weight
5 Left
outlet
outlet
2. CUTTING THE HOLE IN THE WALL FOR THE
CONNECTING PIPING
WARNING
If the wall pipe is not used, the cord interconnecting the
indoor and outdoor units may touch metal and cause electric leakage.
(1) Cut a 65 mm diameter hole in the wall at the position shown in.
(2) When cutting the wall hole at the inside of the installation frame, cut
the hole to a point of intersection of center marks.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 10 mm below less.
(3) Cut the hole so that the outside end is lower (5 to 10 mm) than
the inside end.
(4) Always align the center of the wall hole. If misaligned, water leak-
age will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into wall cap,
fasten the cap with vinyl tape, and stick the pipe through the hole.
(The connection pipe is supplied in the installation set.)
Center mark
Lower
10 mm
or over
Fasten with
vinyl tape
(Wall pipe)
Wall cap
(6) For 5 left piping and 2 right piping, cut the hole a little lower so that
drain water will flow freely.
(Inside) (Outside)
5 to 10 mm low
Wall
Lower
10 mm
or over
65 mm dia.
hole
3. FORMING THE DRAIN HOSE AND PIPE
CAUTION
1 Do not remove the flare nut from the indoor unit pipe
until immediately before connecting the connection pipe.
2 To prevent breaking of the pipe, avoid sharp bends. Bend
the pipe with a radius of curvature of 70 mm or over.
3 If the pipe is bent repeatedly at the same place, it will
break.
[1 Rear piping, 2 Right piping, 3 Bottom piping]
• Install the indoor unit piping in the direction of the wall hole and
bind the drain hose and pipe together with vinyl tape.
• Install the piping so that the drain hose is at the bottom.
Cut off the piping
outlet cutting
groove with a
hacksaw, etc.
Decorative
tape
Right piping
Notch the thin part of
under cover A.
Bottom piping
Bind with vinyl tape
Pipe (top)
Rear piping
Indoor unit drain
hose (bottom)
• Perform “4 INDOOR UNIT WIRING” before performing this piping.
• Wrap the pipes of the indoor unit that are visible from the outside
with decorative tape.
• After passing the indoor piping and drain hose through the wall
hole, hang the indoor unit on the hooks at the top and bottom of
the wall hook bracket.
Top hooks
Indoor unit
(Fitting)
After hooking the indoor unit to the top hook, hook the
fittings of the indoor unit to the two bottom hooks while
lowering the unit and pushing it against the wall.
Bottom hooks
Wall hook
bracket
[For 4 Left rear piping, 5 Left piping]
Interchanging the drain hose
Interchange the drain cap and the drain hose.
For left outlet
piping, cut off the
piping outlet
cutting groove with
a hacksaw.
Remove the drain
Drain cap
Under cover
Indoor unit drain hose
cap by pulling at
the projection at the
end of the cap with
pliers, etc.
Removing the drain hose
CAUTION
After removing the drain hose, do not forget to install
the drain cap.
Remove the under cover A and pull off the drain hose.
Indoor unit
Drain cap
Insert the drain cap and drain hose
until it butts against the drain port.
drain hose
Installing the drain hose
Insert the drain hose into the drain port.
Indoor unit
drain hose
Insert the drain hose until it butts
Drain port
Indoor unit drain hose
• For left piping and left rear piping, align the marks on the wall hook
bracket and shape the connection pipe.
• Bend the connection piping at a bend radius of 70 mm or more and
install no more than 35 mm from the wall.
Bend (R70) with a
pipe bender
• When extending the drain hose at the indoor unit, install the accessory
drain insulation.
Drain insulation
Drain hose
• Place the indoor unit drain hose behind the piping.
against the drain port.
Connection pipe
(6.35 mm dia.)
Connection pipe
(9.52 mm dia.)
Vinyl tape
Align the marks.
Indoor unit drain
hose
[Installing the indoor unit]
• Hang the indoor unit from the hooks at the top of the wall hook
bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook
bracket and separate the bottom of the indoor unit from the wall.
Indoor unit
(Spacer)
Wall hook bracket
(Continued to the next page)
2
3
1
1
3
2
1
1
2
2
3
22
3
3
1
1
3
1
B
Lo
Hi
L
N
POWER
1
2
3
B2
1
2
3
B1
1
2
3
A
1
2
3
1
2
3
1
2
3
L
N
POWER
1
2
3
B
1
2
3
A
1
2
3
1
2
3
EARTH
220-240 V
50 Hz/1ø
Unit A Unit B Power
Unit A Unit B Power
Unit A Unit B1 Unit B2 Power
0.1 sec.
OFF
ON
0.1 sec.
OFF
ON
0.5 sec.
2 sec.
OFF
ON
0.5 sec.
2 sec.
OFF
ON
0.5 sec.
2 sec.
OFF
ON
0.5 sec.
2 sec.
OFF
ON
FRONT PANEL AND UNDER
COVER REMOVAL
FRONT PANEL REMOVAL AND INSTALLATION
THE INTAKE GRILLE REMOVAL
(1) Open the intake grille.
(2) Pull down the knob.
(3) Open the intake grille, and lift the intake grille upward, until the axle at
the top of the intake grille is removed.
Intake grille
Grille
Fixing axle
Knob
THE INTAKE GRILLE INSTALLATION
(1) The fixing axle of the intake grille is installed on the front panel.
(2) Push the knob up to the position.
(3) Lay down the intake grille.
Intake grille
Grille
Fixing axle
Knob
Fixing axle
Mounting
shaft
Knob
THE FRONT PANEL REMOVAL
(1) Turn the wind guide and remove two screws at two sides of air outlet.
(2) Take out the air outlet part of the front panel, then lift the whole front
panel up to remove it.
Fixing screw (2 position)
Lift up
Tur ning direction
Front panel
Before turning
1 Turning wind guide
After turning
THE FRONT PANEL INSTALLATION
(1) Firstly fit the lower part of the front panel to the air outlet part and
insert its lower edge into the slot of the lower cover.
(2) Insert three hooks on the upper side of the front panel into the slot of
bracket.
(3) Turn the wind guide, tighten the screws, and then turn the wind guide
back to its original position.
Top hook
Top hole
Front cover
Bracket
THE UNDER COVER REMOVAL AND INSTALLATION
The under cover removal should be done after the panel has been removed beforehand, or the parts may be damaged.
The under cover should be installed before the fixing of the panel, or it
may result in poor installation.
THE UNDER COVER REMOVAL
(1) While pressing the joint part between the right part of the under cover
and the bracket, pull it out of the slot.
(2) Hold two sides of the under cover and slide it to the left. Make sure its
under part getting out of the slot.
(3) Turn the right part of the under cover under-left to separate the left
slot of the under cover from the bracket.
THE UNDER COVER INSTALLATION
(1) Hold two sides of the under cover and align it to the side of the bracket.
Firstly match the left slot on the under cover to the bracket.
(2) Make five slots on the under cover fit into the fixing plate of the body,
then slide it to the right until the left side of the under cover align to the
bracket.
(3) Push the right part of the under cover inward to make the slot and
bracket engaged with each other completely.
4
INDOOR UNIT WIRING
CAUTION
1 Before starting work, check that power is not being
supplied to indoor units and the outdoor unit.
2 Match the terminal block numbers and connection cord
colors with those of the outdoor unit.
Erroneous wiring may cause burning of the electric
parts.
3 Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
4 Always fasten the outside covering of the connection
cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)
5 Always connect the ground wire.
(1) Remove the front panel. (To remove the front panel, refer to “3 FRONT
PANEL AND UNDER COVER REMOVAL” in this installation instruction sheet.)
(2) Remove the under cover.
Removing the UNDER COVER
Right bottom of indoor unit
Under cover
(3) Remove the cord clamp.
(4) Bend the end of the connection cord as shown in the figure.
(5) Connect the end of the connection cord fully into the terminal block.
Earth screw
Connection cord
(Equivalent to H07RN-F
2
1.5 mm
to 2.5 mm2)
Pull
Cord clamp
(There is a terminal block inside.)
12 mm
18 mm
Be sure that the cord is
not applied inside the
hatched lines.
100 mm
35 mm
(6) Fasten the connection cord with a cord clamp.
Ter minal block
Reference
Fasten the connection cord
with the position shown in
the figure as reference.
Sheath
Indoor unit
Fasten the outside
covering of the
connection cord with
cord clamp.
Connection cord
Insert the tab into the square
hole of the indoor unit and
fasten with a screw.
5
CONNECTING THE PIPING
(Tab)
terminal block
Cord clamp
Screw
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 R410A flare tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
L
Table 5-1 Flaring dimension: B
Pipe outside
diameter
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
When using conventional flare tools to flare R410A pipes, the dimension
A should be approximately 0.5 mm more than indicated in Table 5-2 (for
flaring with R410A flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A.
Table 5-2 Pipe outside diameter
Pipe outside
diameter
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
Flare tool for R410A, clutch type
Pipe
+0
B (mm)
-0.4
9.1
13.2
A (mm)
0 to 0.5
0 to 0.5
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 70 mm or over.
(3) If the copper pipe is bent or pulled to often, it will become stiff. Do not
bend the pipe more than three times at one place.
3. CONNECTION PIPES
Outdoor unit
(1) Detach the caps and plugs from the pipes.
CAUTION
11
1 Be sure to apply the pipe against the port on the in-
11
door unit and outdoor 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.
22
2 Do not remove the flare nut from the indoor unit pipe
22
until immediately before connecting the connection
pipe.
(2) Centering the pipe against port on the indoor unit, turn the flare nut
with your hand.
To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
(3) Attach the connection pipe.
Flare nut
2-way valve
(Liquid)
3-way valve (Gas)
Frare nut
Connection pipe
(Liquid)
Connection pipe
(Gas)
(4) When the flare nut is tightened properly by your hand, use a torque
wrench to finally tighten it.
Holding spanner
Body side
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.
Table 5-3 Flare nut tightening torque
Flare nut
6.35 mm dia.
9.52 mm dia.
Do not remove the cap from the connection pipe before connecting
the pipe.
6
Tightening torque
16 to 18 N·m
(160 to 180 kgf
30 to 42 N
(300 to 420 kgf
VACUUM PROCESS
Tightening torque standard
(using a 20 cm wrench)
·
cm)
·
m
·
cm)
Wrist strength
Arm strength
CAUTION
1 Do not purge the air with refrigerants but use a vacuum
pump to vacuum the installation! There is no extra refrigerant in the outdoor unit for air purging!
2 Use a vacuum pump for R410A exclusively. Using the
same vacuum pump for different refrigerants may damage 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.
Tightening torque
Blank cap
Charging port cap
20 to 25 N · m (200 to 250 kgf · cm)
13 to 16 N · m (125 to 160 kgf · cm)
Hexagon wrench
Use a 4 mm
7
hexagon wrench
Charging port
Service hose
with valve core
Service hose
with valve core
Service hose
with valve core
Gauge manifold
Vacuum pump
Service hose
GAS LEAKAGE INSPECTION
Blank cap
Spindle
Cap
CAUTION
After connecting the piping, check the joints for gas leakage with gas leak detector.
8
ADDITIONAL CHARGE
2 ROOMS MULTI MODEL
Refrigerant suitable for a piping length (each indoor unit) 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.
Piping length
(for each indoor unit)
Additional refrigerant
(for each indoor unit)
7.5 m 10 m 15 m
(25 ft) (33 ft) (49 ft)
None
25 g 75 g 10 g/m
(0.9 oz) (2.6 oz) (0.11 oz/ft)
3 ROOMS MULTI MODEL
Unit A: Refrigerant suitable for a piping length of 7.5 m is charged in
Unit B1+B2: Refrigerant suitable for a total piping length of 15 m is
When the piping is longer than 7.5 m (Unit A), 15 m (Unit B1+B2), additional
charging is necessary.
For the additional amount, see the table below.
Unit A:
Piping length
Additional
refrigerant
Unit B1+B2:
Total piping
length (B1+B2)
Additional
refrigerant (B1+B2)
11
1 When moving and installing the air conditioner, do not
11
22
2 When charging the refrigerant R410A, always use an
22
33
3 When charging the refrigerant, take
33
44
4 Add refrigerant from the charging valve after the com-
44
55
5 If the units are further apart than the maximum pipe
55
the outdoor unit at the factory.
charged in the outdoor unit at the factory.
7.5 m 10 m 15 m
(25 ft) (33 ft) (49 ft)
None
7.5 m 10 m 15 m 20 m
(25 ft) (33 ft) (49 ft) (65 ft)
None None None
25 g 75 g 10 g/m
(0.9 oz) (2.6 oz) (0.11 oz/ft)
50 g 10 g/m
(0.11 oz/ft)
CAUTION
(1.8 oz)
mix gas other than the specified refrigerant (R410A)
inside the refrigerant cycle.
electronic balance for refrigerant charging (to measure the refrigerant by weight).
into account the slight change in the
composition of the gas and liquid
Gas
R410A
phases, and always charge from the
liquid phase side whose composition is stable.
Liquid
pletion of the work.
length, correct operation can not be guaranteed.
9
OUTDOOR UNIT WIRING
WARNING
1 Before starting work, check that power is not being
supplied to the outdoor unit.
2 Match the terminal block numbers and connection cord
colors with those of the indoor unit side.
Erroneous wiring may cause burning of the electric
parts.
3 Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
4 Always fasten the outside covering of the connection
cord with cord clamps. (If the insulator is clamped, electric leakage may occur.)
5 Always connect the ground wire.
(1) Service cover removal
• Remove the two mounting screws.
• Remove the service cover by pushing downwards.
Direction of the service
panel removal
(2) Process the end of the connection cords to the dimension shown in
(Fig. 9-2) and bend the end of each cord as shown in (Fig. 9-1).
Fig. 9-1 Stripped length
12 to 13 mm
(3) Connect the end of the power supply cord and connection cord fully
into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Fasten the power supply cord and connection cord with cord clamps
and binder as shown in (Fig. 9-2).
Hook
(3 places)
Service cover
Power supply cord
UNIT B2 connection cord
(3 ROOMS MULTI MODEL ONLY)
UNIT B or UNIT B1 connection cord
UNIT A connection cord
Fig. 9-2
HEAT & COOL MODEL (Reverse cycle)
Ter minal block
Cord clamp
2 ROOMS MULTI COOLING MODEL
Ter minal block
Cord clamp
3 ROOMS MULTI MODEL
Ter minal block
Cord clamp
40 mm
(Insulator)
(Sheath)
30 mm
Power supply cord
(Insulator)
(Sheath)
Connection cord
Binder
Binder
30 ~ 40 mm
40 ~ 50 mm
Indoor and outdoor wire connection
[Wall Mounted type]
· 9000+9000 BTU Model
· 12000+7000 BTU Model
· 12000+12000 BTU Model
Power supply cord
Connection cord
B
Connection cord
A
[Wall Mounted type]
· 3 ROOMS MULTI MODEL
OUTDOOR UNIT INDOOR UNIT
Connection cord
Power supply cord
220-240V
50 Hz/1ø
EARTH
(6) Be sure to seal the hole when applying the putty.
Putty
(7) Put the service cover and valve cover back after completion of the
work.
Connection cord
Connection cord
CAUTION
Do not make power supply cord and connection cord come
in contact with valve (Gas).
10
(1) Insulate between pipes.
• For rear, right, and bottom piping, overlap the connection pipe heat
insulation and indoor unit pipe heat insulation and bind them with
vinyl tape so that there is no gap.
• For left and left rear piping, butt the connection pipe heat insulation
and indoor unit pipe heat insulation together and bind them with
and vinyl tape so that there is no gap.
Connection pipe
B2
B1
A
(heat insulation)
• For left and left rear piping, wrap the area which accommodates
the rear piping housing section with cloth tape.
Connection pipe
Cloth tape
• For left and left rear piping, bind the connection cord to the top of
the pipe with vinyl tape.
Connection cord
• For left and left rear piping, bundle the piping and drain hose together by wrapping them with cloth tape over the range within which
they fit into the rear piping housing section.
Wrap with cloth tape
Pipe
Drain hose
FINISHING
Overlap the insulation.
Indoor unit pipe (heat insulation)
Vinyl tape
Bind the pipes together so that
there is no gap
Wrap with cloth tape
Vinyl tape
Cloth tape
Pipe
Connection cord
Indoor unit pipe
Pipe
Left piping
Drain hose
(2) Temporarily fasten the connection cord along the connection pipe with
vinyl tape. (Wrap to about 1/3 the width of the tape from the bottom of
the pipe so that water does not enter.)
(3) Fasten the connection pipe to the outside wall with a saddle, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer
so that rain water and wind cannot blow in.
Outside wall cap
Saddle
Sealer putty
Pipe
(5) Fasten the drain hose to the outside wall, etc.
Check the following:
GOOD BAD BAD
Drain hose
Saddle
Lifted up
11
POWER
Wall
Wave
(Outdoors)
End in water
WARNING
1 The rated voltage of this product is 220-240 V A.C. 50 Hz.
2 Before turning on the verify that the voltage is within
the 198 V to 264 V range.
3 Always use a special branch circuit and install a spe-
cial receptacle to supply power to the room air conditioner.
4 Use a circuit breaker and receptacle matched to the
capacity of the room air conditioner.
5 The circuit breaker is installed in the permanent wir-
ing. Always use a circuit that can trip all the poles of
the wiring and has an isolation distance of at least 3mm
between the contacts of each pole.
6 Perform wiring work in accordance with standards so
that the room air conditioner can be operated safely
BAD
12
• Perform test operation and check items 1 and 2 below.
• For the operation method, refer to the operating manual.
• The outdoor unit may not run, depending on the room temperature.
In this case, press the test run button on the remote control unit while
the room air conditioner is running.
(With the transmit section of the remote control unit toward the air
conditioner, press the TEST RUN button with the tip of a ball point pen.)
Transmitter section
Operation can be checked by lighting and flashing of the display section
OPERATION and TIMER lamps.
Perform judgement in accordance with the following.
• Test running
When the air conditioner is run by pressing the remote control unit
test run button, the OPERATION and TIMER lamps flash slowly at
the same time. To end test operation, press the remote control unit
START/STOP button.
• Error
The OPERATION, TIMER and SWING lamps operate as follows according to the error contents.
TEST RUNNING
Test r un button
INDOOR UNIT
Error display
Error contents
Indoor unit circuit board error
Room temperature thermistor or
piping thermistor error (wire disconnected or broken)
Indoor unit-outdoor unit miswiring
Indoor unit fan error
Outdoor unit thermistor error
: Fast flashing : Slow flashing — : Off
OPERATION
(RED)
2 times
5 times
6 times
TIMER SWING
(GREEN)
2 times
(ORANGE)
—
—
—
—
—
and positively.
Check that:
• The top and bottom hooks are hooked firmly and the indoor unit
does not move to the front and rear or left and right.
• The indoor unit is accurately positioned horizontally and vertically.
• When connected from the left rear, the drain hose is at the bottom
left of the wall pipe.
(For connection from
the left rear)
(View from indoors)
Wall pipe
Connection
pipe
Drain hose
Connection cord
7 Install a leakage circuit breaker in accordance with the
related laws and regulations and electric company
standards.
CAUTION
1 The power source capacity must be the sum of the room
air conditioner current and the current of other electrical appliances. When the current contracted capacity
is insufficient, change the contracted capacity.
2 When the voltage is low and the air conditioner is diffi-
cult to start, contact the power company to have the
voltage raised.
3 This air conditioner must be connected to a power
source that has an electrical impedance of 0.329
ΩΩ
Ω
or
ΩΩ
OUTDOOR UNIT [Heat & Cool model (Reverse cycle) and
3 Rooms multi model only]
When a malfunction occurs in the outdoor unit, the LEDs on the circuit
board light to indicate the error. Refer to the following table for the description of each error according to the LEDs.
Error display
LED1 LED2
Quick flash continued Quick flash continued
Dislighting continued
2 quick flash repeated
Dislighting continued
3 quick flash repeated
4 quick flash repeated Dislighting continued Outdoor temperature
5 quick flash repeated Dislighting continued UNIT A
6 quick flash repeated Dislighting continued UNIT A
7 quick flash repeated Dislighting continued UNIT A
Dislighting continued
2 quick flash repeated
Dislighting continued
3 quick flash repeated
Dislighting continued 5 quick flash repeated UNIT B
Dislighting continued 6 quick flash repeated UNIT B
Dislighting continued 7 quick flash repeated UNIT B
When the fault is cleared, the LED lamp goes off.
Error contents
Model abnormal or
EEPROM abnormal
UNIT A
Discharge temperature sensor error
UNIT A
Outdoor heat
exchanger temperature sensor error
sensor error
Communication signal error
Indoor unit error
Discharge temperature
abnormal
UNIT B
Discharge temperature sensor error
UNIT B
Outdoor heat
exchanger temperature sensor error
Communication signal error
Indoor unit error
Discharge temperature
abnormal
CHECK ITEMS
(1) INDOOR UNIT
(1) Is operation of each button on the remote control unit normal?
(2) Does each lamp light normally?
(3) Do the air flow direction louvers operate normally?
(4) Is the drain normal?
(5) Is there any abnormal noise and vibration during operation?
(2) OUTDOOR UNIT
(1) Is there any abnormal noise and vibration during operation?
(2) Will noise, wind, or drain water from the unit disturb the neighbors?
(3) Is there any gas leakage?
• Do not operate the air conditioner in the test running state for a long
time.
• For the operation method, refer to the operating manual and perform
operation check.
13
Explain the following to the customer in accordance with the operating
manual:
(1) Starting and stopping method, operation switching, temperature ad-
justment, timer, air flow switching, and other remote control unit op-
erations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation instruction sheets to the customer.
14
CUSTOMER GUIDANCE
REMOTE CONTROL UNIT
HOLDER INSTALLATION
CAUTION
1 Check that the indoor unit correctly receives the
signal from the remote control unit, then install the
remote control unit holder.
2 Select the remote control unit holder selection site by
paying careful attention to the following:
Avoid places in direct sunlight.
Select a place that will not be affected by the heat from
a stove, etc.
Install the remote control unit holder to a wall or pillar with the tapping
screws.
1 Set
Remote control unit
mounting
Remote control
unit holder
Tapping
screw
(small)
Remote control unit
holder fixing
2 Push
Remote
control unit
less or has a supply current of 100 A or greater. lf the
power supply does not meet the specifications, contact
the power company.
PART NO. 9375301019
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