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Please mount the Outdoor unit of stable ground to prevent vibration and increase
of noise level.
Decide the location for piping after sorting out the different types of pipe available.
When removing side cover, please pull the handle after undoing the hook by pulling
it downward. Reinstall the side cover in the reverse order of the removal.
Please face this side (suction side)
Please remove terminal cover
of the unit to the wall.
when connecting the piping
and connecting cord.
RAC-18WPA/RAC-25WPA
Please remove side cover
Please face this side (suction
when connecting the piping
side) of the unit to the wall.
and connecting cord.
Pull downward
RAC-35WPA
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There is holes on the base of Outdoor unit for condensed water to exhaust.
In order to flow condensed water to the drain, the unit is installed on a stand or a
block so that the unit is 100mm above the ground as shown figure. Join the drain
pipe to one hole.
After installation, check whether the drain pipe clings to the base firmly.
BASE
BASE
above
above
100mm
100mm
DRAIN HOLE
Outer diameter:
6 DRAIN PIPE
Outer diameter:
16 mm or more
16 mm or more
RAC-18WPA/RAC-25WPA
Install the outdoor unit horizontally and make sure that condensate drains away.
In case of using in chilly area
Especially, in case that there are many snows by very cold in chilly area, condensed
water freezes on the base and may result not to drain. In this case, please remove
the bush and the drain pipe at the bottom of unit. (Left and center near discharge
portion of air, each 1 place). It becomes smooth drain.
Ensure that the distance from the drain hole to the ground is 250 mm or more.
THIS APPLIANCE MUST BE
WARNING
EARTHED.
Procedures of Wiring
Indoor Unit
Outdoor Unit
(A) (B)
ø1.6 or
L N C D
ø2.0
Connecting Cord
AC 220-230V
1ø 50Hz
Detail of cutting the connecting cord
Indoor Unit
30mm
Green + Yellow
10mm
70mm
10mm
Outdoor Unit
50mm
10mm
10mm
Green + Yellow
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.
There is an AC voltage drop between the LN terminal if the power is on. Therefore,
be sure to remove the plug from its socket.
WARNING
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.
Power Source And Operation Test
Power Source
WARNING
Never remodel the power plug nor extend the long-distance
cord.
Keep additional length for the power cord and do not render
the plug under external force as this may cause poor contact.
Do not fix the power cord with U-shape nail.
The power cable easily generates heat. Do not bring the
cable together with a wire or vinyl tie.
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 won't operate, check the cable for correct
connection.
Turn on the lamp in the room where the indoor unit is installed
and check the remote controller for normal operation.
After completing the service switch
operation, be sure to keep the
switch pressed for one or more
seconds and stop the force-cooling
operation.
<7473B:
>
1
Preparation of Pipe
Use a pipe cutter to cut the copper pipe and remove burr.
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.
CAUTION
Do not touch the suction
por t, bottom surface, or
aluminum fin of the outdoor
unit.
Failure to do so may cause
an injury.
2
Pipe Connection
CAUTION
DRAIN HOLE
BUSH
Push
Push
BUSH
DRAIN PIPE
Please be careful when bending the copper pipe.
Screw in manually while adjusting the center. After that, use a torque wrench to
RAC-35WPA
tighten the connection.
Wrench
Wiring of The Indoor Unit
For wire connection of the Indoor unit, you need to remove the front cover, the low cover
under the body of the unit and terminal cover.
Remove the cover from the terminal base and screw the cable.
50mm
Green + Yellow
Strip wires
Pull at the
the directions as shown
by arrows to remove the
cover.
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.
RAC-18WPA/RAC-25WPA
Screw
Please remove side cover.
Service switch (If the switch is pressed for one
or more seconds, the force-cooling operation
starts. If the switch is pressed for additional
one or more seconds, the operation stops.)
RAC-35WPA
Screw
Cover
Service switch (If the switch is pressed for one
or more seconds, the force-cooling operation
starts. If the switch is pressed for additional
one or more seconds, the operation stops.)
Do not operate the unit for more than 5 minutes
CAUTION
while the spindle of the service valve is closed.
Trimming tool
Copper pipe
CAUTION
Die
Die
A
Please use
exclusive tool for
refrigerant R410.
Copper pipe
Outer
A (mm) Rigid Flaring Tool
Diameter (Ø)
For R410A tool
For R22 tool
6.35 (1/4")
0 - 0.5
1.0
9.52 (3/8")
0 - 0.5
1.0
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 specified 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.
Outer diameter
Flare nut
of pipe (ø)
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)
Valve
Small diameter side 6.35 (1/4")
19.6 – 24.5 (200 – 250)
head cap
Large diameter side 9.52 (3/8")
19.6 – 24.5 (200 – 250)
Torque
Valve core cap
12.3– 15.7 (125 – 160)
wrench
D
Connecting cord
C
Connecting cord
Earth
After remove the screw
and terminal cover, and
put the connecting cords
and fix the terminal cover
with screw.
Method to remove the low cover
and
in
How to remove the front cover
Remove the front panel
Please remove and attach the front panel by both hands.
After opening the front panel by both hands.
Undo the right arm while pushing it inside.
Slide the front panel to right as shown in figure. Then remove
while pulling it to front.
Remove the filters.
After removing two screws, pull the center of the front cover
towards you and release the claws.
Pull the side faces (lower sections) of the front cover towards
you as shown in the figure and remove the cover.
Push up the [PUSH] sections at the bottom of the indoor unit and
pull the bottom plate towards you. Then the claws are released
from the stationary plate.
(The [PUSH] sections are indicated by 2 arrows in the right figure)
3
Remove of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap
of valve core. Then, connect the charge
hose. Remove the cap of valve head.
1
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
2
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
3
direction to allow the flow of refrigerant
(using Hexagonal Wrench key).
Tighten the cap of valve head. Check the
4
cap's periphery if there is any gas leakage.
The task is then completed.
The body of service
valve
Cap of
valve core
Cap of valve
Torque N·m
head
Hexagonal wrench Key
(kgf·cm)
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.
How to connect the optional parts
(RAC Adapter, Weekly Timer Wired 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.
Card Key: CN6
H-LINK:CN7
Weekly Timer Wired Remote Control : CN9
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.
Wiring of the Outdoor Unit
Please remove the side cover for wire connection.
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
WARNING
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.
cover
Earth terminal
RAC-18WPA/RAC-25WPA
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.
How to Attach the Front Cover
Check that the drain pan is securely attached.
After installing the front cover onto the unit, hook three claws
at upper side of the cover securely. Then, push the center of
the front cover to lock the claws.
Tighten the two screws.
Install the filter.
Slide the shafts of the right and left arms on the front panel
along the steps to insert the shafts into the holes till they stop.
After checking that the shafts are securely inserted, close the
panel.
HOW TO REMOVE INDOOR UNIT
RAC-18WPA
RAC-25WPA
When the meter reaches - 101KPa
(-76cmHg) during pumping fully
tighten the shuttle.
Meter showing
pressure
Closed
R410A
Charge
Manifold
hose
valve
Vacuum
pump
Valve
Vacuum
pump
adapter
When pumping starts, slightly
Valve
loosen the flare nut to check of
air sucked in. Then tighten the
flare nut.
RAC-35WPA
When the meter reaches - 101KPa
(-76cmHg) during pumping fully
tighten the shuttle.
Meter showing
pressure
Closed
R410A
Charge
Manifold
hose
valve
Vacuum
pump
Valve
Vacuum
pump
adapter
Valve
When pumping starts, slightly
loosen the flare nut to check of
air sucked in. Then tighten the
Cap of valve
flare nut.
head
CN6
CN7
CN9
cover
Earth terminal
RAC-35WPA
IMPORTANT
Fuse Capacity
16A time delay fuse
Wire length Wire gauge
up to 6m
1.6mm
2
up to 15m
2.5mm
2
up to 20m
4.0mm
2
[PUSH] mark positions
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