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1. Preparation of pipe
• Use a pipe cutter to cut the copper pipe and remove burr.
Trimming tool
Copper pipe
CAUTION
• Remove burr and jagged edge will cause leakage.
• Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe.
• Before flaring, please put on the flare nut.
• Please use exclusive tool for refrigerant R410.
Die
Die
A
Copper pipe
Outer diameter (ø)
A (mm) Rigid Flaring Tool
For R410A tool
For R22 tool
6.35 (1/4")
0 – 0.5
1.0
9.52 (3/8")
0 – 0.5
1.0
12.7 (1/2")
0 – 0.5
1.0
2. Pipe connection
CAUTION
• In case of removing flare nut of a indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side
will fly out. Free from water into the piping when working.
• Be sure to tighten the flare nut to the specfied torque with a torque wrench. If the flare nut is overtightened, the nut may
be split after a long period has passed, and may cause a refrigerant leak.
• Please be careful when bending the copper pipe.
• Screw in manually while adjusting the center.
After that, use a torque wrench to tighten the connection.
Wrench
Outer diameter
Torque N·m
of pipe (ø)
(kgf·cm)
Small diameter side
6.35 (1/4")
13.7 – 18.6 (140 – 190)
9.52 (3/8")
34.3 – 44.1 (350 – 450)
Large diameter side
12.7 (1/2")
44.1 – 53.9 (450 – 550)
Small diameter side
6.35 (1/4")
19.6 – 24.5 (200 – 250)
Valve head cap
9.52 (3/8")
19.6 – 24.5 (200 – 250)
Large diameter side
12.7 (1/2")
29.4 – 34.3 (300 – 350)
Valve core cap
12.3 – 15.7 (125 – 160)
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THIS APPLIANCE MUST BE EARTHED.
WARNING
Procedures of wiring
Detail of cutting the connecting cord
Indoor unit
Outdoor unit
• Indoor unit
50mm
10mm
Green + Yellow (ground)
ø1.6 or
ø2.0
Strip
C, D
wires
10mm
Connecting cord
25mm
Connecting cord
• Outdoor unit
160mm
AC 220–230V
10mm
10mm
1ø 50Hz
L, N
Strip wires
Green + Yellow
Green +
Yellow
20mm
20mm
100mm
WARNING
• The naked part of the wire core should be 10mm fix it to the terminal tightly. Then try to pull the individual wire to check
if the contact is tight. Improper insertion may burn the terminal.
• Be sure to use only wire specified for the use of air-conditioner.
• Please refer to the manual for wire connection and the wiring technique should meet the standard of the electrical
installation.
• Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord
band.
• Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure
on the wire as this may cause overheating or fire.
Connection of the connection cord
(1) Remove the cover of the electric box.
Connection of the connecting
(2) Connect the connecting cords.
cord
(3) Assemble the cover of electric box.
Securely screw in the connecting
cord so that it will not get loose or
Remove the cover from the terminal base and screw the cable.
disconnect.
Tightening torque reference value:
1.2 to 1.6 N·m (12 to 16 kgf·cm)
Connect the earth cord
Excessive tightening may damage
C
the interior of the cord requiring
replacement.
After remove the screw
and cover, and put the
connecting cords and
D
fix the cover with screw.
WARNING
After wiring the indoor unit, make sure to reattach the terminal cover.
< S885 : A >
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< S818 : A >
B
< S885 :
>
3. Remove of air from the pipe and gas leakage inspection
Procedures of using vacuum pump for air removal
Remove the cap of valve core. Then, connect the charge
1
hose. Remove the cap of valve head. Connect the vacuum
pump adapter to the vacuum pump and connect the charge
hose to the adapter.
Fully tighter the "Hi" shuttle of the manifold valve and
completely unscrew the "Lo" shuttle. Run the vacuum pump
for about 10-15 minutes, then completely tighten the "Lo"
2
shuttle and switch off the vacuum pump.
• Loosen the spindle of the service valve with small
diameter by 1/4 turn and tighten the spindle immediately
after 5 to 6 seconds.
• Remove the charging hose from the service valve.
Completely unscrew the spindle of the service valve (at 2
3
places) in anticlockwise direction to allow the flow of
refrigerant (using Hexagonal Wrench key).
Cap of valve
core
4
Tighten the cap of valve head. Check the cap's periphery
if there is any gas leakage. The task is then completed.
Gas leakage inspection
Please use gas leakage detector to check if leakage occurs at connection of Flare nut as shown
on the right.
If gas leakage occurs, further tighten the connection to stop leakage.
Flare nut
Torque wrench
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Wiring of the outdoor unit
Please remove the side cover for wire connection.
WARNING
• If you cannot attach the side plate due to the connection cord, please press the connecting cord in the direction to the front panel
to fix it.
• Be sure that the hooks of the side cover fixed in certainly. Otherwise water leakage may occur and this causes short circuit or
faults.
• The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating operation.)
Checking for the electric source and the voltage range
• Before installation, the power source must be checked and necessary wiring work must be completed. To make the wiring capacity
proper, use the wire gauge list below for the wiring from house distribution fuse box to the outdoor unit in consideration of the blocked
rotor current.
160mm
C, D
IMPORTANT
Wire length
Wire gauge
up to 6m
1.6mm
2
100mm
up to 15m
2.5mm
2
up to 25m
4.0mm
2
L(A) N(B) C
D
Cover
Earth terminal
RAC-25FX8
RAC-25FXA
RAC-50FX8
RAC-50FXA
RAC-35FX8
RAC-35FXA
When putting two connecting cords through the band.
Screw
Insulating plate
IMPORTANT
Cord band
Fuse Capacity
16A time delay fuse
Connecting cord
Connecting cord
Investigate the power supply capacity and other electrical conditions at the installing location.
•
•
Depending on the model of room air conditioner to be installed, request the customer to make arrangements for the necessary
electrical work etc.
•
The electrical work includes the wiring work up the outdoor unit. In localities where electrical conditions are poor, use of a voltage
regulation is recommended.
•
Install outdoor for the room air conditioner within the reaching range of the line cord.
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1. Operation test
• Please ensure that the air conditioner is in normal operating condition during the operation test.
• Explain to your customer the proper operation procedures as described in the user's manual.
• If the indoor unit does not operate, check to see that the connections are correct.
When the meter reaches -101KPa (-76cmHg) during pumping
• Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation.
fully tighten the shuttle.
Meter showing pressure
Insulation and maintenance of pipe connection
Closed
• The connected terminals should be completed sealed with heat insulator and
R410A Manifold valve
Charge hose
then tied up with rubber strap.
Valve
Vacuum pump
• Please tie the pipe and power line together with vinyl tape as shown in the figure
showing the installation of Indoor and outdoor units. Then fix their position with
holders.
Vacuum pump adapter
• To enhance the heat insulation and to prevent water condensation, please cover
When pumping starts, slightly loosen the
the outdoor part of the drain hose and pipe with insulation pipe.
Valve
flare nut to check of air sucked in. Then
• Completely seal any gap with putty.
tighten the flare nut.
2. Installation of remote controller
The body of
service valve
• The remote controller can be placed in its holder which is fixed on wall or beam.
• To operate the remote controller at its holder, please ensure that the unit can receive signal transmitted from the controller
at the place where the holder is to be fixed. The unit will beep when signal is received from the remote controller. The signal
transmission is weaken by the fluorescent light. Therefore, during the installation of the remote control holder, please switch
Cap of valve head
on the light, even during day time, to determine the mounting location of the holder.
Cap of valve head
The controller must be hooked onto the hook at the lower part of the holder.
Hexagonal wrench key
The remote controller must be slide in the
Push in the remote controller in the direction as shown in figure below.
remote controller holder, in the direction as
shown in the figure, until it hooks at the
lower end of the remote controller holder.
Force-cooling operation
• When the service switch of the outdoor unit is pressed for 1 or more seconds, the force-cooling operation starts. Use this
mode when performing the failure diagnosis or collecting refrigerant into the outdoor unit.
Cover
Do not operate the unit for more than 5 minutes while the spindle of the service valve is closed.
Cover
Earth terminal
CAUTION
1. Remove the front cover
Latch
OUTSIDE
INSIDE
Screw
Sleeve of
protection pipe
Putty
Front Panel
Putty
1 Push the latch at both sides to open the front panel. Pull out the filter and remove 3 screws.
Screw
Screw Cap
Remote
3 Take off 2 screw caps at the lower part of
Controller
the horizontal air deflector and remove 2
screws. Then leave the upper louver in
open position.
Remote
Screw (2 pieces)
Controller
Holder
2. Install the front cover
Holder for Remote
Controller
Screw (2 pieces)
Front Cover Fixing Claws (4 places)
Remote controller
Screw
Service switch (If the switch is pressed for more
1 Set the upper louver in open position.
than 1 second, the force-cooling operation
starts. If the switch is pressed for additional
more than 1 second, the operation stops.)
CAUTION
How to connect the optional parts
• For cable connection to control P.W.B., you need to remove front cover and electrical box cover. Each
connecting location is as below.
1 RAC Adapter: CN7
2 Weekly Timer Wired Remote Control: CN9
3 Wired Remote Control: CN9
• Please check and confirm manuals attached to each optional parts for more connection details.
• You can refer to this installation manual how to remove and re-attach the front cover.
• Please be careful not to damage lead wires by edge of plate when connecting the optional parts.
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Using the claws at the top of front cover to remove and install front cover to the cabinet. Too much force on the
claws may cause breakage when removing or installing the front cover. Please follow the below procedures for
removal and installation of front cover.
Removal and installation of front cover
Front Panel
Latch
Screw
2 Lift up the front panel and latch the claws
firmly at the lower part of rear of the front
panel.
Upper Louver
Then remove 3 screws.
Front Cover
Horizontal
Air Deflector
Cabinet
4 Hold both sides of the lower part of front
cover and pull down towards an oblique
direction.
Front Cover
Claw
Cabinet
Cabinet
Upper Louver
Front Cover
Fixing Claws
Horizontal
(4 places)
Air Deflector
Lower Flame
2 Insert the front cover fixing claws
3 Put the horizontal air deflector to the
(4 places) to the insertion groove of the
lower part of front cover frame and insert
cabinet and put the upper louver through
to the cabinet.
to the front cover frame.
After fixed the front cover, fix back all the
screws in order.
(RAC Adapter, Weekly Timer Remote Control, Wired Remote Control)
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