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10mm
10mm
50mm
25mm
20mm
100mm
10mm
160mm
20mm
100mm
10mm
160mm
L N C D
Cover
RAC-50FX8
L(A) N(B) C
D
Cover
Earth terminal
RAC-25FX8
RAC-35FX8
AIR REMOV
AL
INST
ALLA
TION OF REFRIGERA
TING PIPES
AND
AIR REMOV
AL
Procedures of using vacuum pump for air removal
A
1. Preparation of pipe
• Use a pipe cutter to cut the copper pipe and remove burr.
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.
Die
Copper pipe
Die
Trimming tool
Copper pipe
2. Pipe connection
Flare nut
Wrench
Torque wrench
Remove the cap of valve core. Then, connect the charge
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”
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
places) in anticlockwise direction to allow the flow of
refrigerant (using Hexagonal Wrench key).
Tighten the cap of valve head. Check the cap’s periphery
if there is any gas leakage. The task is then completed.
1
2
3
4
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.
When the meter reaches -101KPa (-76cmHg) during pumping
fully tighten the shuttle.
Meter showing pressure
Closed
R410A Manifold valve
Vacuum pump
Vacuum pump adapter
Valve
Charge hose
Valve
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
The body of
service valve
Cap of valve
core
Cap of valve head
Hexagonal wrench key
Cap of valve head
3. Remove of air from the pipe and gas leakage inspection
Gas leakage inspection
Outer diameter
Torque N·m
of pipe (ø)
(kgf·cm)
Small diameter side
6.35 (1/4")
13.7 – 18.6 (140 – 190)
Large diameter side
9.52 (3/8")
34.3 – 44.1 (350 – 450)
12.7 (1/2")
44.1 – 53.9 (450 – 550)
Valve head cap
Small diameter side
6.35 (1/4")
19.6 – 24.5 (200 – 250)
Large diameter side
9.52 (3/8")
19.6 – 24.5 (200 – 250)
12.7 (1/2")
29.4 – 34.3 (300 – 350)
Valve core cap
12.3 – 15.7 (125 – 160)
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.
• Before flaring, please put on the flare nut.
• Please use exclusive tool for refrigerant R410.
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
• 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.
CONNECTION OF POWER CORD
Procedures of wiring
Detail of cutting the connecting cord
Connecting cord
ø1.6 or
ø2.0
Outdoor unit
Indoor unit
AC 220–230V
1ø 50Hz
WARNING
THIS APPLIANCE MUST BE EARTHED.
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.
C
Connect the earth cord
Connection of the connecting
cord
Securely screw in the connecting
cord so that it will not get loose or
disconnect.
Tightening torque reference value:
1.2 to 1.6 N·m (12 to 16 kgf·cm)
Excessive tightening may damage
the interior of the cord requiring
replacement.
D
After remove the screw
and cover, and put the
connecting cords and
fix the cover with screw.
Connecting cord
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.)
•
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.
Wire length
Wire gauge
up to 6m
1.6mm
2
up to 15m
2.5mm
2
up to 25m
4.0mm
2
Fuse Capacity
16A time delay fuse
IMPORTANT
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.
IMPORTANT
When putting two connecting cords through the band.
Screw
Connecting cord
Insulating plate
• Indoor unit
• Outdoor unit
Green + Yellow (ground)
Connecting cord
C, D
C, D
L, N
Green + Yellow
Green +
Yellow
Strip wires
Connection of the connection cord
(1) Remove the cover of the electric box.
(2) Connect the connecting cords.
(3) Assemble the cover of electric box.
Remove the cover from the terminal base and screw the cable.
WARNING
After wiring the indoor unit, make sure to reattach the terminal cover.
Cord band
FINAL
ST
AGE OF INS
T
ALLA
TION
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.
• Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation.
Insulation and maintenance of pipe connection
• The connected terminals should be completed sealed with heat insulator and
then tied up with rubber strap.
• 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.
• To enhance the heat insulation and to prevent water condensation, please cover
the outdoor part of the drain hose and pipe with insulation pipe.
• Completely seal any gap with putty.
2. Installation of remote controller
• 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
on the light, even during day time, to determine the mounting location of the holder.
Holder for Remote
Controller
Remote controller
Screw (2 pieces)
Sleeve of
protection pipe
Putty
Putty
OUTSIDE INSIDE
The controller must be hooked onto the hook at the lower part of the holder.
Push in the remote controller in the direction as shown in figure below.
CAUTION
Do not operate the unit for more than 5 minutes while the spindle of the service valve is closed.
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.
CAUTION
Removal and installation of front cover
How to connect the optional parts
(RAC Adapter, Weekly Timer Remote Control, Wired Remote Control)
•
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.
Screw
Cover
Service switch (If the switch is pressed for more
than 1 second, the force-cooling operation
starts. If the switch is pressed for additional
more than 1 second, the operation stops.)
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.
1
Push the latch at both sides to open the front panel. Pull out the filter and remove 3 screws.
2
Lift up the front panel and latch the claws
firmly at the lower part of rear of the front
panel.
Then remove 3 screws.
3
Take off 2 screw caps at the lower part of
the horizontal air deflector and remove 2
screws. Then leave the upper louver in
open position.
1
Set the upper louver in open position.
2
Insert the front cover fixing claws
(4 places) to the insertion groove of the
cabinet and put the upper louver through
to the front cover frame.
3
Put the horizontal air deflector to the
lower part of front cover frame and insert
to the cabinet.
After fixed the front cover, fix back all the
screws in order.
4
Hold both sides of the lower part of front
cover and pull down towards an oblique
direction.
2. Install the front cover
1. Remove the front cover
Latch
Latch
Screw
Screw
Screw
Screw Cap
Upper Louver
Upper Louver
Horizontal
Air Deflector
Horizontal
Air Deflector
Lower Flame
Front Panel
Front Panel
Front Cover
Front Cover
Front Cover Fixing Claws (4 places)
Front Cover
Fixing Claws
(4 places)
Claw
Cabinet
Cabinet
Cabinet
Strip
wires
Earth terminal
RAC-50FXA
RAC-25FXA
RAC-35FXA
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