General ASHB24LD, ASHB24LDC, AOHS24LDC Installation Manual
12 34
SPLIT TYPE ROOM AIR CONDITIONER
INSTALLATION MANUAL
(PART NO. 9315342195-01)
This air conditioner uses new refrigerant HFC (R410A).
The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:
(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant (R22) models,
some of the piping and installation and service tools are special.(See the table below.)
Especially, when replacing a conventional refrigerant (R22) model with a new refrigerant R410A
model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.
(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent
erroneous charging with conventional refrigerant (R22) and for safety. Therefore, check
beforehand.[The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]
(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant
(R22) models. Also, when storing the piping ,securely seal the 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
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/10m. 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
when using R22, 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.
(1) 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.)
(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.
When installing pipes shorter than 3m, sound of the outdoor unit will be transferred to the indoor unit, which will
cause large operating sound or some abnormal sound.
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 (-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) 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
CONNECTION PIPE REQUIREMENT
Nominal
diameter
1/4in
5/8in
WARNING
CAUTION
Outer
diameter
6.35mm
15.88mm
Thickness
0.8mm
1.0mm
Maximum
length
30m(99ft)
Maximum height
(between indoor and
outdoor)
20m(66ft)
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 specified 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.
● 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 30 m. The maximum height difference of the piping is 20 m,
if the units are further apart than these, correct operation can not be guaranteed.
STANDARD ACCESSORIES
The following installation accessories are supplied.
Use them as required.
Name and Shape Q’ty Name and Shape Q’ty
Wall hook bracket
Cloth tape
1
Remote
control
unit
Tapping screw (big)
1
Battery
Tapping screw (small)
2
Remote control
unit holder
Air-cleaning and
Deodorizing filter
1
Drain pipe
Insulation (Drain hose)
1
1
8
2
1
1
One set of following parts are necessary in istallation of this product.
Name
Connection pipe assembly
Connection cord
Wall pipe
Decorative tape
Vinyl tape
Wall cap
Saddle
Drain hose
Tapping screws
Sealant
ELECTRICAL REQUIREMENT
• Electric wire size and fuse capacity:
MODEL 24,000 BTU class
Power supply cord (mm2)
Connection cord (mm2)
Fuse capaclity (A) 30
• Install the disconnect device with a contact gap of at
least 3 mm nearby the units. (Both indoor unit and outdoor unit)
• Always make the air conditioner power supply a special branch circuit and provide a special breaker.
• Always use Type245 IEC57 or equivalent as the power
supply cord and the connection cord.
MAX. 4.0
MIN. 3.5
MAX. 2.5
MIN. 1.5
INDOOR UNIT
CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING
(1) Cut a 80 mm diameter hole in the wall at the position shown in the
figure.
(2) When cutting the wall hole at the inside of the wall hook bracket, cut
the hole to a point of intersection of center marks.
When cutting the wall hole at the outside of the wall hook bracket, cut
the hole at a point of 10mm below.
(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 leakage
will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into the wall cap,
fasten the cap with vinyl tape, and stick the pipe through the hole.
(The connection pipe is supplied in the installation set.)
(6) For left piping and right piping and center piping, cut the hole a little
lower so that drain water will flow freely.
INSTALLING THE WALL HOOK BRACKET
(1) Install the wall hook bracket so that it is correctly positioned horizon-
tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.
(2) Install the wall hook bracket so that it is strong enough to withstand
the weight of an adult.
● 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.
WARNING
If the wall pipe is not used, the cord interconnecting
the indoor and outdoor units may touch metal and
cause electric leakage.
FORMING THE DRAIN HOSE AND PIPE
[Rear piping, Right piping, 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.
● Wrap the pipes of the indoor unit that are visible from the outside
with decorative tape.
[For Left rear piping, Left piping]
Interchange the drain cap and the drain hose.
CAUTION
(1) In order to align the drain hose and drain cap, be
sure to insert securely and vertically. Incline insertion will cause water leakage.
(2) When inserting, be sure not to attach any material
besides water. If any other material is attached, it
will cause deterioration and water leakage.
(3) After removing drain hose, be sure not to forget
mounting drain cap.
(4) Be sure to fix the drain hose with tape to the bottom
of piping.
(5) Prevent drain water frozen under low tempera-
ture environment.
When installing indoor unit's drain hose outdoors, necessary
measure for frost protection should be taken to prevent drain
water frozen.
• Under low temperature environment (when outdoor temperature under 0 °C), after cooling operation is executed,
water in the drain hose could be frozen.
Once drain water is frozen, the drain hose will be blocked
and water leakage may be resulted for indoor unit.
Fasten with
vinyl tape
(Wall cap)
Install the wall hook bracket horizontally and
perpendicularly.
Right piping
Insert the drain hose and drain cap into the drain port, making sure that it comes in contact with the back of the drain
port, and then mount it. If the drain hose is not connected
properly, leaking will occur.
• Attach the Insulation (Drain hose) to the drain hose.
Wall hook bracket
Lower
80 mm hole
(Wall pipe)
(Inside) Wall (Outside)
Wall hook bracket
Tapping screw
(size: large; quantity: 8)
Bottom
piping
Indoor unit
drain hose
Wall hook
bracket
CAUTION
Bind with vinyl tape
Pipe (top)
Rear piping
Indoor unit drain hose
(bottom)
Drain cap
CAUTION
Drain hose
Centering marks
Lower
10 mm or
80 mm hole
5~10 mm
Leveling method
Weight
For left outlet piping, cut off the
piping outlet cutting groove
with a hacksaw.
Remove the drain cap by pulling
at the projection at the end of
the cap with pliers, etc.
Insulation (Drain hose)
over
Hang weight
from here.
String
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 the bend radius of 100 mm or more
and install no more than 35 mm from the wall.
● 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.
[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
Wall hook
bracket
Connection piping
Indoor unit
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.
Alignment marks
Small piping
Large piping
(Fitting) Bottom hooks
Top hooks
Wall hook
bracket
FRONT PANEL REMOVAL AND INSTALLATION
AIR CLEANING UNIT REMOVAL
(1) Open the intake grille, and then remove the right air filter.
(2)
Pull the air cleaning unit grip in the direction of the arrow and remove the unit.
AIR CLEANING UNIT INSTALLATION
(1) Open the intake grille, and then insert the dust collection unit into the
indoor unit.
(2) Install the right air filter, and then close the intake grille.
THE INTAKE GRILLE REMOVAL
(1) Open the intake grille.
(2) Pull down the knob.
(3) Lift the intake grille upward, until the axle at the top of the intake grille is
removed.
THE INTAKE GRILLE INSTALLATION
(1) The fixing axle of the intake grille is installed on the Panel.
(2) Lay down the intake grille.
THE FRONT PANEL REMOVAL
(1) Remove intake grille (Reference the intake grille removal.)
(2) Remove seven screws.
(3) The thumb is hung on the lower part as shown in the figure, and it pulls
to the front, pushing [-] mark , and bottom hooks (two position) is removed from wall hook bracket.
(4) The front panel is pulled to the front, raising the upper surface, and a
front panel is removed.
Screws (7 position)
Push
Top holes (two sides)
Top hole (center)
INSERT
Intake grille
Mounting shaft
Bearing
Front panel
Front panel
Wall hook bracket
Push
[-] mark
PULL
Grip
Intake grille
Knob
Front panel
Top hook (center)
Front panel
THE FRONT PANEL INSTALLATION
(1) Firstly, fit the lower part of the front panel, and insert top and bottom
hooks. (Three top sides)
(2) Six screws is attached.
(3) The intake grille is attached.
Indoor unit
Top hooks
(two sides)
CAUTION
Install the front panel and INTAKE GRILLE securely. If installation is imperfect, the front panel or INTAKE GRILLE may
fall off and cause injury.
REMOTE CONTROL UNIT 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.
1. REMOTE CONTROL UNIT HOLDER INSTALLATION
• Install the remote control unit with a distance of 7 m between the remote control unit and the photocell as the criteria. However, when
installing the remote control unit, check that it operates positively.
• Install the remote control unit holder to a wall, pillar, etc. with the
tapping screw.
Remote control unit holder fixing
Remote control
unit holder
Tapping
screw
(small)
Remote control unit mounting
1 Set
2 Push
Remote
control unit
SELECTING THE MOUNTING
POSITION
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) Install the unit near an electric outlet or special branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc. into consideration and leave the spaces shown
in the figure. Also install the unit where the filter can be removed.
2. OUTDOOR UNIT
(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 flow.)
(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 dis-
turbed by air blowing into their windows or by noise.
(5) Provide the space shown in the figure so that the air flow is not blocked.
Also for efficient operation, leave open three of the four directions
front, rear, and both sides.
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 com-
bustible 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 can-
not reach the unit.
(4) Install the indoor unit on the wall where the height
from the floors more than 230 cm.
[Indoor unit piping direction]
The piping can be connected in the 7 directions in the figure. When
the piping is connected in direction 2, 3, 4 or 5, cut along the
piping groove in the side of the front panel with a hacksaw.
(Rear)
7 Left rear
outlet
2 Right
outlet
3 Bottom outlet
1 Rear
outlet
6 Center
outlet
4 Left bottom
outlet
5 Left
outlet
INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS
[INDOOR UNIT]
6 cm or over
5 cm or over
150 cm or over
Dust
collection unit
Air-cheaning and
Deodorizing filter
control unit
230 cm or over
Remote
[OUTDOOR UNIT]
60 cm or over
10 cm or over
30 cm or over
• Do not directly install it on
the ground, otherwise it
will cause failure.
• To obtain better operation
54 cm
efficiency, when the outdoor
unit is installed, be sure to
open the front and left side.
5 cm or over
32 cm
CAUTION
(1) 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 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 difficult to get warm and it is
likely to cause of the breakdown. Please construct a canopy and a pedestal or place the unit on a high stand (local configured).
Wall hook bracket
5 cm or over
(Wall cap)
Remote
control unit
holder
Tapping
screw(small)
10 cm or over
30 cm or
over
Outdoor
unit bottom
Drain hose
CONNECTING THE PIPING
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installa-
tion 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 flare surface and tightening the nut
hand tight, tighten the nut to the specified tightening torque with a
torque wrench.
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 onto the pipe and flare
the pipe with a flaring tool.
Insert the flare nut (always use the flare nut at-
tached 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 adjustment gauge and secure
the A dimension shown in the table.
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
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 150mm or over.
(3)
If the copper pipe is bend the pipe or pulled to often, it will become stiff.
Do not bend the pipes more than three times at one place.
INDOOR UNIT WIRING
(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.
Connection cord
Cord clamp
(There is a
terminal block
inside.)
Screw
HOW TO CONNECT WIRING TO THE TERMINALS
A. For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insula-
tion to about 25 mm (1") to expose the solid wire.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal board.
(3) Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
(4) Shape the loop wire properly, place it on the terminal board and tighten se-
curely with the terminal screw using a screwdriver.
B. For strand wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insula-
tion to about 10 mm (3/8") to expose the strand wiring.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal board.
(3) Using a round terminal fastener or pliers, securely clamp a round terminal to
each stripped wire end.
(4) Position the round terminal wire, and replace and tighten the terminal screw
using a screwdriver.
(1) Match the terminal block numbers and connection
cord colors with those of the outdoor unit.
Erroneous wiring may cause burning of the electric
parts.
(2) Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
Connection cord
CAUTION
Tighten with two wrenches.
Wrench (fixed)
Torque
wrench
Indoor unit pipe
Flare nut tightening torque and L dimension
Flare nut
6.35 mm dia.
15.88 mm dia.
Pipe outside diameter
Pipe outside
diameter
ø 6.35 mm (1/4”)
ø 15.88 mm (5/8”)
(630 to 750 kgf•cm)
R410A, clutch type
Flare nut
Connection pipe
Tightening torque
16 to 18 N•m
(160 to 180 kgf•cm)
63 to 75 N•m
Flash tool for
0 to 0.5
0 to 0.5
To prevent gas leakage, coat the flare
surface with refrigerator oil.
L dimension
1.4 to 1.7mm
2.2 to 2.4mm
A (mm)
Conventional (R22) flare tool
Clutch type
1.0 to 1.5
1.0 to 1.5
Wing nut type
1.5 to 2.0
1.5 to 2.0
CAUTION
(1) Fasten a flare nut with a torque wrench as instructed in this manual. If
fastened too tight, the flare 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 firmly
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.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the connection cord with a cord clamp.
Cord clamp
35 mm
Strip 25 mm (1")
Wire
25 mm
A. Solid wire
Insulation
Round
terminal
Terminal block
(3) Always fasten the outside covering of the connec-
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
(4) Securely earth the power cord plug.
(5) Do not use the earth screw for an external connector.
Only use for interconnection between two units.
Tab
Screw
Insert the tab into the square hole of the
indoor unit and fasten with a screw.
Loop
Screw with
special washer
Terminal
board
Wire
Square hole
B. Strand wire
Strip 10 mm (3/8")
Screw with
special washer
Round
terminal
Round
terminal
CUSTOMER GUIDANCE
Explain the following to the customer in accordance with the operating manual:
(1) Starting and stopping method, operation switching, temperat-ure adjustment, timer, air flow switching, and other remote control unit operations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation manuals to the customer.
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.
When using the remote control unit
Press the TEST RUN button after starting the cooling operation by the remote control unit.
The operation indicator lamp and timer indicator lamp will begin to flash simultaneously during test run.
When using the MANUAL AUTO button of the indoor unit (The remote control unit is lost, and so on.)
Keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds.
(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 (0.5~0 kg/cm
(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.)
2
).
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.
POWER
WARNING
(1) The rated voltage of this product is 230 V AC 50 Hz.
(2) Before turning on the power, check if the voltage is within the
220 V -10 % to 240 V +10 % range.
(3) Always use a special branch circuit and install a special recepta-
cle to supply power to the room air conditioner.
(4) Use a circuit breaker and receptacle matched to the capacity of
the air conditioner.
(1) The power source capacity must be the sum of the 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 difficult to start, contact the power company the voltage raised.
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).
(5) Do not extend the power cord.
(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.
CAUTION
CAUTION
Installation instruction on the back.
L
O
H
I
OUTDOOR UNIT
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 trou-
ble.
Connector cover removal
● Remove the tapping screws.
Installing the connector cover
(1) After inserting the two front hooks, then insert the rear hook.
(2) Tighten the tapping screws.
WARNING
(1) Install the unit where it will not be tilted by more
than 5°.
(2) When installing the outdoor unit where it may ex-
posed to strong wind, fasten it securely.
AIR PURGE
Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged 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 flare nut of the 3-way valve and check if air
enters, then retighten the flare nut.
(When the flare 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 (-76 cmHg, -1 bar).
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,
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 difficult to disconnect
the charge hose.)
Additional charge
Refrigerant suitable for a piping length of 15 m is charged in the outdoor
unit at the factory.
When the piping is longer than 15 m, additional charging is necessary.
For the additional amount, see the table below.
Pipe length
Additional refrigerant
20 m
100 g
25 m
200 g
30 m
300 g
Tapping screw
Front hooks
Rear hooks
Connector cover
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
Blank cap (2-way valve) 20 to 25 N•m (200 to 250 kgf•cm)
Blank cap (3-way valve) 30 to 35 N•m (300 to 350 kgf•cm)
Charging port cap 10 to 12 N•m (100 to 120 kgf•cm)
Gauge manifold
-0.1 MPa
(-76 cmHg
-1 bar)
Low pressure
side valve
Charge hose
Pressure gauge
High
pressure
side valve
(closed)
Charge
hose
Vacuum pump
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 30 m. If
the units are further apart than this, correct
operation can not be guaranteed.
Between 15 m and 30 m, when using a connection pipe other than
that in the table, charge additional refrigerant with 20g/1 m as the
criteria.
OUTDOOR UNIT WIRING
(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.
Control box
Connection cord
Cord
clamp
Connection cord wiring
Run the connection cord to the rear of the outdoor unit within the A
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)
5cm
10cm
Connection cord
CAUTION
(1) Match the terminal block numbers and connection
cord colors with those of the indoor unit.
Erroneous wiring may cause burning of the electric
parts.
(2) Connect the connection cords firmly to the terminal
block. Imperfect installation may cause a fire.
(3) Always fasten the outside covering of the connec-
(4) Securely earth the power cord plug.
(5) Do not use the earth screw for an external connector.
FINISHING
(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 and center 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.
● For left and left rear piping and center piping, wrap the area which accommodates the
rear piping housing section with cloth tape.
● For left and left rear piping and center piping, bind the connection cord to the top of the
pipe with vinyl tape.
● For left and left rear piping and center 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.
(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 saddles, 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.
(5) Fasten the drain hose to the outside wall, etc.
Wall
(Outside wall cap)
(Sealer putty)
(Outdoors)
(Saddle)
Pipe
Earth
screw
12
Earth screw Earth screw
tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)
Only use for interconnection between two units.
Bind the pipes together so
that there is no gap.
Left piping
Connection cord
Pipe
Check the following:
Earth
screw
SheathCord clamp
4
3
Connection pipe
(heat insulation)
Pipe
GOOD
45mm
Connection cord
Overlap the insulation
Drain hose
Drain hose
Cloth tape
Drain hose
Saddle
40mm
Outdoor unit terminal blockIndoor unit terminal block
12
Vinyl tape
Wrap with
cloth tape
For connection from the left rear
Wall pipe
Drain hose
BAD
Lifted up
40mm
LN
3
Indoor unit pipe
(heat insullation)
Connection cord
Connection
pipe
BAD BAD
Wave End in water
TEST RUNNING
● Perform test operation and check items 1 and 2 below.
● For the test operation method, refer to the operating manual.
● The outdoor unit, may not operate, depending on the room temperature. In this case, press the test run button on the remote control unit while
the air conditioner is running, (Point the transmitter section of the remote control unit toward the air conditioner and press the test run button
with the tip of a ball-point pen, etc.)
● To end test operation, press the remote control unit START/STOP button.
(When the air conditioner is run by pressing the test run button, the OPERATION indicator lamp and TIMER indicator lamp will simultaneously
flash slowly.)
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 louver operate normally?
(4) Is the drain normal?
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?
Transmitter section
Test run button
45mm
P/N 9315342195-01
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