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[Installing the indoor unit]
Top hooks
• Hang the indoor unit from the
hooks at the top of the wall hook
bracket.
Bottom hooks
Indoor unit
(Spacer)
• Insert the spacer, etc. between the indoor unit and the
wall hook bracket and separate the bottom of the indoor
unit from the wall.
• After hooking the indoor unit to the top hook, hook the fittings of
Wall hook bracket
the indoor unit to the two bottom hooks while lowering the unit
and pushing it against the wall.
CAUTION
• 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.
Flare connection (Pipe connection)
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
Check if [L] is
to the indoor and outdoor units respectively) onto the
flared uniformly
pipe and perform the flare processing with a flare tool.
and is not cracked
Use the special R410A flare tool, or the conventional
or scratched.
(for R22) flare tool.
Die
When using the conventional flare tool, always use
A
an allowance adjustment gauge and secure the A
dimension shown in table below .
Pipe
L
Pipe outside diameter
(mm)
A
Pipe outside
Flare tool for R410A
Conventional (R22) flare tool
diameter
Clutch type
Clutch type
Wing nut type
ø 6.35 mm (1/4")
0 to 0.5
1.0 to 1.5
1.5 to 2.0
ø 9.52 mm (3/8")
0 to 0.5
1.0 to 1.5
1.5 to 2.0
Connection
Tighten with two wrenches.
(1) Install the outdoor unit wall cap (supplied with the
optional installation set or procured at the site) to
Wrench (fixed)
the wall pipe.
Torque
(2) Connect the outdoor unit and indoor unit piping.
wrench
(3) After matching the center of the flare surface and
tightening the nut hand tight, tighten the nut to the
Connection pipe
specified tightening torque below with a torque
Indoor unit pipe
wrench.
Flare nut size and tightening torque
To prevent gas
Flare nut [mm (in.)]
Tightening torque [N•m (kgf•cm)]
leakage, coat
the flare surface with
6.35 (1/4) dia.
16 to 18 (160 to 180)
refrigerator oil.
9.52 (3/8) dia.
32 to 42 (320 to 420)
CAUTION
• 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.
• 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.
Indoor unit wiring
(1) Remove the wire cover.
(2) Remove the cable clamp.
Wire cover
(3) Bend the end of the connection cable
Cable clamp
as shown in the figure.
Screw
(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.
Insert the wire cover tab into the
square hole of the indoor unit and
fasten with a screw.
Connection cable
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.
7. OUTDOOR UNIT INSTALLATION
• Set the unit on a strong stand, such as one made of concrete
Switch cover
blocks to minimize shock and vibration.
• Do not set the unit directly on the ground because it will
cause trouble.
Hooks
Switch cover removal
(1) Remove the screw.
(2) Push downward the cover.
Screw
Installing the switch cover
(1) After inserting the four hooks, then slide the cover.
(2) Tighten the screw.
WARNING
• 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.
CAUTION
• Refrigerant must not be discharged into atmosphere.
• After connecting the piping , check the joints for gas leakage with gas leak detector.
(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).
Flare nut
(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.)
Compound pressure gauge
2-way valve
-0.1 MPa (-76 cmHg -1 bar)
3-way valve
Flare nut
Low pressure
side valve
Valve stem
Blank cap
Charge hose
Charging
Charging port
port cap
Tightening torque [
Blank cap
20.0 to 25.0 (200 to 250 )
Charging port cap
12.5 to 16.0 (125 to 160 )
Additional charge
Refrigerant suitable for a piping length of 10 m is charged in the outdoor unit at the factory.
When the piping is longer than 10 m, additional charging is necessary.
For the additional amount, see the table below.
Pipe length
10 m
Additional refrigerant
None
CAUTION
• When adding refrigerant, add the refrigerant from the charging port at the completion of work.
• The maximum length of the piping is 15 m. If the units are further apart than this, correct
operation can not be guaranteed.
Between 10 m and 15m, when using a connection pipe other than that in the table, charge
additional refrigerant with 20g/1 m as the criteria.
Outdoor unit wiring
Terminal cover
Earth
(Ground)
screw
Screw
Cable clamp
Terminal cover
Earth
(Ground)
screw
Cable clamp
Connection cable wiring
HOLE
A
HOLE
• 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.
8. FINISHING
Overlap the insulation
Connection
pipe
(heat insulation)
Bind the pipes
Vinyl tape
together so that
there is no gap.
Left piping
Connection cable
Gauge manifold
Pressure gauge
LO
Pipe Drain hose
HI
High pressure
side valve
(closed)
Charge hose
Vacuum pump
Pipe
Wrap with
cloth tape
Cloth tape
Drain hose
N • m(kgf • cm)]
For connection from the left rear
Wall pipe
Connection cable
Connection pipe
Drain hose
Outside
wall cap*
Saddle*
15 m
Rate
+100 g
20 g/m
(Outdoors)
Wall
Pipe
*Field supplied
9.
Indoor unit terminal block
Outdoor unit terminal block
• Perform test operation and check items 1 and 2 below.
• For the test operation method, refer to the operating manual.
Earth
• The outdoor unit, may not operate, depending on the room
(Ground)
screw
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
Connection cable
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.)
Power supply cable
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?
(1) Remove the outdoor unit switch
(4) Is the drain normal?
cover.
2. Outdoor unit
(2) Remove the outdoor unit terminal
(1) Is there any abnormal noise and vibration during operation?
1
2
3
L
N
(2) Will noise, wind, or drain water from the unit disturb the neighbors?
cover and cable clamp.
(3) Is there any gas leakage?
(3) Bend the end of the cable as shown
in the figure.
10.
(4) Connect the end of the connection
Explain the following to the customer in accordance with the operating manual.
cable fully into the terminal block.
(1) Starting and stopping method, operation switching, temperature adjustment, timer,
(5) Fasten the sheath with a cable clamp.
airflow switching, and other remote controller operations.
(6) Install terminal cover as shown in
(2) Air filter removal and cleaning, and how to use the air louvers.
the figure, and switch cover.
(3) Give the operating and installation manuals to the customer.
11. FRONT PANEL REMOVAL AND INSTALLATION
Intake grill removal
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.)
b
CAUTION
Front panel removal
Screws (Wire cover) Wire cover
Screws (3 position)
(1) Remove intake grille
(Reference the intake grille removal.)
(1) Insulate between pipes.
(2) Remove wire cover.
• For rear, right, and bottom piping, overlap the
(3) Remove 3 screws.
connection pipe insulation and indoor unit pipe
Front panel installation
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.
(1) Firstly, fit the lower part of the front panel,
(2) Temporarily fasten the connection cord along the
and insert top and bottom hooks.
connection pipe with vinyl tape. (Wrap to about 1/3 the
( 3 top sides, 6 bottom sides)
width of the tape from the bottom of the pipe with tape
so that water does not enter.)
12.PUMP DOWN OPERATION (FORCED COOLING OPERATION)
(3) Fasten the connection pipe to the outside wall with
saddles,etc.
To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal,
(4) Fill the gap between the outside wall pipe hole and the
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
pipe with sealant so that rain water and wind cannot
blow in.
forced cooling operation.)
(5) Fasten the drain hose to the outside wall, etc.
(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.
Check the following:
Keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds.
Good
The operation indicator lamp and timer indicator lamp will begin to flash simultaneously
Drain hose
during test run. (The forced cooling operation cannot start if the MANUAL AUTO button
Saddle
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.
Sealer
Prohibited
Prohibited Prohibited
• Press the START/STOP button of the remote controller to stop the operation.
putty*
• 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.)
Wave
Lifted up
End in water
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.
TEST RUN
Transmitter
section
Test run button
CUSTOMER GUIDANCE
Intake grill installation
While holding the grille
horizontal, set the left
Open the intake
and right mounting
grille. While gently
shafts into the pillow
pressing the left
blocks at the top of the
a
and right mounting
panel "c".
shafts of the intake
To latch each shaft
grille outward "a",
c
properly, insert the
remove the intake
shaft until it snaps.
grille in direction
of the arrow "b".
Press 4 places on the
intake grille to close it
completely.
(4) The front panel is pulled to the front,
raising the upper surface, and a front
panel is removed.
Top hooks
Top holes
Indoor unit
Front panel
Bottom holes
Bottom hooks
(2) Three screws is attached.
(3) The wire cover is attached.
(4) The intake grille is attached.
CAUTION
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