• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting the drain hose, no other material than water should be applied. Application
of other material than water will cause deterioration of the hose, and may cause water leakage.
• After you remove a drain hose, be sure to attach the drain cap.
• When you secure the piping and drain hose with tape, arrange the drain hose so that it
comes under bottom of piping.
• For drain hose piping in low temperature environment, you need to apply frozen protection
to prevent a frozen drain hose. After cooling operation is performed in low temperature
environment, (when outdoor temperature under 0 °C,) water in the drain hose could be
frozen. Frozen drain water will block the water flow in the hose, and may cause water
leakage at the indoor unit.
[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.
Top hooks
Bottom hooks
Flare connection (Pipe connection)
Die
A
Pipe L
Check if [L] is
flared uniformly
and is not cracked
or scratched.
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 attached
to the indoor and outdoor units respectively) onto the
pipe and perform the flare processing with a flare tool.
Use the special R410A flare tool, or the conventional
(for R22) flare tool.
When using the conventional flare tool, always use
an allowance adjustment gauge and secure the A
dimension shown in table below .
Flare nut size and tightening torque
Flare nut [mm (in.)] Tightening torque [N•m (kgf•cm)]
6.35 (1/4) dia. 16 to 18 (160 to 180)
9.52 (3/8) dia. 32 to 42 (320 to 420)
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 flare surface and
tightening the nut hand tight, tighten the nut to the
specified tightening torque below with a torque
wrench.
Pipe outside diameter
A
(mm)
Pipe outside
diameter
ø 6.35 mm (1/4”)
ø 9.52 mm (3/8”)
Flare tool for R410A
Clutch type
0 to 0.5
0 to 0.5
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
Tighten with two wrenches.
Torque
wrench
Wrench (fixed)
Flare nut
Indoor unit pipe Connection pipe
To prevent gas
leakage, coat
the flare surface with
refrigerator oil.
• 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.
Indoor unit
Wall hook bracket
(Spacer)
• 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.
Indoor unit wiring
Screw
• Match the terminal block numbers and connection cable colors with those of the outdoor
unit. Incorrect wiring may cause a fire.
• When fixing the connection cable with the cable clamp, always fasten the cable at the
plastic jacket portion, but not at the insulator portion. If the insulator is chafed, electric
leakage may occur.
• Always connect the earth (ground) wire. Improper earthing (grounding) work can cause
electric shocks.
• Connect the connection cables firmly to the terminal block. Imperfect installation may
cause a fire.
• Do not use the ground screw for the indoor unit to the outdoor unit unless it is specified.
Cable
clamp
(1) Remove the wire cover.
(2) Remove the cable clamp.
(3) Bend the end of the
connection cable as shown
in the figure.
(4) Connect the end of the connection
cable fully into the terminal block.
(5) Fasten the connection cable with a
cable clamp.
(6) Fasten the wire cover.
7. OUTDOOR UNIT INSTALLATION
• Install the unit where it will not be tilted by more than 5°.
• When installing the outdoor unit where it may exposed 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.
• Refrigerant must not be discharged into atmosphere.
• After connecting the piping , check the joints for gas leakage with gas leak detector.
Hooks
Screw
Switch cover
(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.)
(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 until it stops turning.)
(11) Firmly tighten the 2-way valve and 3-way valve blank cap and the charging port cap.
3-way valve
2-way valve
Charging
port cap
Vacuum pump
Charge hose
Charge hose
Charging port
Blank cap
Valve stem
Flare nut
Compound pressure gauge
Gauge manifold
Pressure gauge
High pressure
side valve (closed)
Low pressure
side valve
-0.1 MPa (-76 cmHg -1 bar)
LO
HI
Tightening torque [
N • m(kgf • cm)]
Blank cap
20.0 to 25.0 (200 to 250 )
Charging port cap
12.5 to 16.0 (125 to 160 )
Switch cover A, B removal
(1) Remove the tapping screws.
(2) Push downward the Switch cover B.
(3) Push upward the Switch cover A.
Installing the switch cover A, B
(1) After inserting the three hooks of Switch cover A, then
push upward.
(2) After inserting the three hooks of Switch cover B, then
push upward, and then tighten the tap ping screw.
WARNING
CAUTION
CAUTION
CAUTION
WARNING
CAUTION
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
15 m
20 m
Rate
Additional refrigerant
None
+100 g
20 g/m
• When adding refrigerant, add the refrigerant from the charging port at the completion of work.
• The maximum length of the piping is 20 m. If the units are further apart than this, correct
operation can not be guaranteed.
Between 15 m and 20m, when using a connection pipe other than that in the table, charge
additional refrigerant with 20g/1 m as the criteria.
Connection cable wiring
(1) Remove the outdoor unit switch cover A, B.
(2) Remove the outdoor unit cable clamp.
(3) Bend the end of the cable as shown in the figure.
(4) Connect the end of the connection cable fully into
the terminal block.
(5) Fasten the sheath with a cable clamp.
(6) Install switch cover A, B.
A
HOLE
HOLE
Run the connection cable to the rear of the outdoor unit
within the A range of the arrows shown in the figure.
(The switch cover becomes difficult to install.)
(1) Insulate between pipes.
• For rear, right, and bottom piping, overlap the
connection pipe insulation and indoor unit pipe
insulation and bind them with vinyl tape so that there
is no gap.
• For left and left rear piping, butt the connection pipe
insulation and indoor unit pipe insulation together and
bind them with and vinyl tape so that there is no gap.
• For left and left rear piping, wrap the area which
accommodates the rear piping storage section with
cloth tape.
• For left and left rear piping, bind the connection cord
to the top of the pipe with vinyl tape.
• For left and left rear piping, bundle the piping and
drain hose together by wrapping them with cloth tape
over within the range of which they fit into the rear
piping storage 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 with tape
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 sealant so that rain water and wind cannot
blow in.
(5) Fasten the drain hose to the outside wall, etc.
8. FINISHING
*Field supplied
Pipe
Saddle*
Outside
wall cap*
(Outdoors)
Wall
Bind the pipes
together so that
there is no gap.
Overlap the insulation
Vinyl tape
Wrap with
cloth tape
Cloth tape
Drain hose
Connection cable
Pipe Drain hose
Check the following:
Good
Drain hose
Saddle
Lifted up
Wave End in water
Drain hose
Connection pipe
Wall pipe
Connection cable
Left piping
Prohibited
Pipe
Connection
pipe
(heat insulation)
Prohibited Prohibited
Sealer
putty*
b
a
Press 4 places on the
intake grille to close it
completely.
Open the intake
grille. While gently
pressing the left
and right mounting
shafts of the intake
grille outward “a”,
remove the intake
grille in direction
of the arrow “b”.
11. FRONT PANEL REMOVAL AND INSTALLATION
Intake grill removal
c
Intake grill installation
While holding the grille
horizontal, set the left
and right mounting
shafts into the pillow
blocks at the top of the
panel “c”.
To latch each shaft
properly, insert the
shaft until it snaps.
Front panel removal
Screws (3 position)
Screws (Wire cover) Wire cover
(1) Remove intake grille
(Reference the intake grille removal.)
(2) Remove wire cover.
(3) Remove 3 screws.
(4) The front panel is pulled to the front,
raising the upper surface, and a front
panel is removed.
Front panel installation
(1) Firstly, fit the lower part of the front panel,
and insert top and bottom hooks.
( 3 top sides, 6 bottom sides)
Bottom holes
Bottom hooks
Top holes
Top hooks
Front panel
Indoor unit
9. TEST RUN
Transmitter
section
Test run button
10. CUSTOMER GUIDANCE
12.PUMP DOWN OPERATION
(FORCED COOLING OPERATION)
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.
• 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
controller while the air conditioner is running. (Point the transmitter
section of the remote controller 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 controller 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 airflow 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?
Explain the following to the customer in accordance with the operating manual.
(1) Starting and stopping method, operation switching, temperature adjustment, timer,
airflow switching, and other remote controller operations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation manuals to the customer.
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 flash 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 (0.5~0 kg/cm2).
(5) Stop the operation.
• Press the START/STOP button of the remote controller 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) Three screws is attached.
(3) The wire cover is attached.
(4) The intake grille is attached.
For connection from the left rear
CAUTION
CAUTION
• Match the terminal block numbers and connection cable colors with those of the outdoor unit.
Incorrect wiring may cause a fire.
• When fixing the connection cable with the cable clamp, always fasten the cable at the plastic
jacket portion, but not at the insulator portion. If the insulator is chafed, electric leakage may
occur.
• Always connect the earth(ground) wire. Improper earthing (grounding) work can cause electric
shocks.
• Connect the connection cables firmly to the terminal block. Imperfect installation may cause a fire.
• Do not use the ground screw for the indoor unit to the outdoor unit unless it is specified.
Cable clamp
Screw
Outdoor unit wiring
Outdoor unit terminal block
Indoor unit terminal block
Connection cable
Earth
(Ground)
screw
Earth
(Ground)
screw
Power supply cable
N
L
3
2
1
Cable clamp
Earth
(Ground)
screw
Hooks
Hooks
Hooks
Switch cover
Connection cable
Wire cover
HOW TO CONNECT THE WIRE TO THE TERMINALS
(1) Use crimp-type terminals with insulating sleeves as shown in the figure below to connect
to the terminal block.
(2) Securely crimp the crimp-type terminals to the wires using an appropriate tool so that the
wires do not come loose.
(3) Use the specified wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screwdriver
that is too small, otherwise, the screw heads may be damaged and prevent the screws
from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Tightening torque
M3.5 screw
M4 screw
M5 screw
0.8 to 1.0 N • m ( 8 to 10 kgf • cm )
1.2 to 1.8 N • m (12 to 18 kgf • cm)
2.0 to 3.0 N • m (20 to 30 kgf • cm)
Strip
10 mm
Crimp-type terminal
Sleeve
Wire
Screw with special washer
Crimp-type terminal
Terminal board
Terminal block
Wire
40 mm
30 mm
12 mm
5 mm
12
mm
5 mm
Insert the wire cover tab into the square hole
of the indoor unit and fasten with a screw.
