Page 1
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Carefully read through the procedures of proper
installation before starting installation work.
The sales agent should inform customers regarding
the correct operation of installation.
THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).
The unit should be mounted at stable, non-vibratory location which can provide
full support to the unit.
INDOOR UNIT
Figure showing the Installation
of Indoor and Outdoor Unit.
The difference in height
between the indoor and
outdoor unit should be
kept below 5m.
The connecting pipe, no
matter big or small,
should all be insulated
with insulation pipe and
then wrapped with plastic
tape. (The insulator will
deteriorate if it is not
wrapped with tape).
The connection of insulated
drain hose.
Please use insulated drain
hose for the indoor piping
(commercial product).
OUTDOOR UNIT
Be sure to
completely
seal any
gap with
putty.
Installation of Mounting Plate, Wall Penetration and Installation of Protection Pipe
1
The draining of the water container inside the indoor unit can be done from the left.
Therefore the mounting plate must be fixed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may overflow the water container.
Direct Mounting On The Wall
Please use hidden beams in the wall to hold the mounting plate.
Wall Penetration and Installation of Protection Pipe
Drill a ø 65mm hole on wall
which is slightly tilted
towards the outdoor side.
Drill the wall at a small angle.
Cut the protection pipe
according to the wall
thickness.
Empty gap in the sleeve of
protection pipe should be
completely sealed with putty
to avoid dripping of rain
water into the room.
Procedures of Installation and Precautions
Procedures to fix the mounting plate.
1.Drill holes on wall.
2.Fix the mounting plate on
(As shown below)
wa l l with M4 x 25 screw
)woleb erugif ni nwohs sA(
Installation of the Indoor Unit
2
VERTICALLY DOWNWARD PIPING
Preparation
Connect power cord.
Pull out the pipe, power cord and drain hose.
Installation
The upper part of the indoor unit is hanged
on the mounting plate.
The projection at the lower part of the indoor
unit is hooked onto the mounting plate.
Please pull the lower part
of the indoor unit
outwards to check if the
unit is hooked onto the
mounting plate. Improper
installation may cause
vibration and noise.
HORIZONTAL PIPING
Preparation
Change of Drain Hose and Installation Procedures.
Exchange the location of drain hose and drain cap during horizontal piping as shown
in figure below. Be sure to plug in the drain hose until the insulating material folds upon
itself.
Please use pliers to pull out the drain cap.
(This is an easier way to remove the drain cap).
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS
During horizontal or downward piping, use a knife to cut
openings as shown in figure. Then smoothen the edges
of openings with a file.
INSTALLATION OF COOLANT PIPES AFTER CONNECTION
The coolant pipes should be adjusted to fit into the
hole on the wall and then ready for further connection.
The terminals of 2 connected pipes must be covered
with insulator used for terminal connection.
Connect the power cord.
After adjustment, fit the power cord and pipes into
the space available under the indoor unit.
The rubber strap used for
fixing the insulator should
not be tied with great force.
Otherwise, this will damage
heat insulation and causes
water condensation.
THE CONNECTION OF COOLANT PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Coolant Pipes
Please fix in the plastic
core after flaring to avoid
plastic chips entering the
pipes.
CAUTION
You are free to choose the side (left or right) for the installation of drain
hose. Please ensure the smooth flow of condensed water of the indoor
unit during installation. (Carelessness may result in water leakage.)
Be sure that the
drain hose is not
loosely connected
or bent.
Be sure that the wire is not
in contact with any metal
in the wall. Please use the
protection pipe as wire
passing through the hollow
part of the wall so as to
prevent the possibility of
damaged by mouse.
Coolant pipes and power cord must be tied together.
The front part of the coolant pipes are at locations
marked with “ ” symbol.
Installation of Drain Hose
3
Pull this to the front
during the connection
of coolant pipes to
ease task.
Installation
Hang the indoor unit onto the mounting plate. Use the temporary
stand at the back of the indoor unit to push its lower part 15cm
forwards.
Place the drain hose through the hole on the wall.
Insulate the connecting portion of coolant pipe with insulator.
Connect the power cord.
After adjustment, the power cord and coolant pipes are placed
into the space available under the indoor unit.
The projection of indoor unit must hook to the mounting
plate.
INDOOR UNIT
Pipe
Power cord
Drain hose
Pipe
Rubber strap tied with great force
Pipe
below
5mm
Please bend at a small
radius to form an arc
about 15cm
Projection
Temporary stand
Hook
Power cord
Protection
pipe
Drain
hose
Connected
terminals
of coolant
pipes
Coolant pipes
Power cord
Heat insulation
pipe
Bending
upwards
Stagment
water
Drain
Stagment
water
Openings
Drain cap
Please insert
until here
Drain hose
Please insert
until here
Mounting Plate
Hook
Coolant pipe
Power Cord
Drain Hose
Protection
Pipe
Lift the body
of the unit
upwards and
then force
it downwards.
Mounting
Plate
Projection
Power line, pipe and
drain hose must be
tied together with
plastic tape.
2~5mm
Protection
pipe
Outdoor
Indoor
Seal with
putty
Sleeve of
protection
pipe
WALL
Remove the cap for drain hose installation
Drain cap
Drain hose
Drain hoseDrain cap
Condensed water may leak out if not inserted properly.
Pipe
support
Pull up the pipe after
bending downward
Transform the piping while holding down the lower portion
of pipe-support by hand.
Indoor Unit
Outdoor Unit
RAS-X10CBK
RAC-X10CBK
+
RAS-X13CBK
RAC-X13CBK
+
RAS-X18CBK
RAC-X18CBK
+
WARNING
Level
Line
Hole for
pipe
Screw for Mounting plate
Mounting
Plate
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
give clearance
as wide as possible
about 0.45m
Maximum pipe length 20m Minimum pipe length 3m
above 300mm
must not bend
above 50mm
above 250mm
above 100mm
above 200mm
above 200mm
above 100mm
above 300mm
above 700mm
SAFETY PRECAUTION
s
Read the safety precautions carefully before operating the unit.
s
The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
WARNING ...... Incorrect methods of installation may cause death or serious injury. This sign indicates prohibition.
CAUTION ....... Improper installation may result in serious consequence.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation and maintenance
of the unit
as described in the user’s guide. Ask customers to keep this installation manual together with the instruction manual.
The Length of Indoor Unit
Power Cord
Do not alter the power cord.
Direction of Piping
There are 4 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right and
horizontally out to left.
Don't form the piping
downward at the left of the unit.
about 1.6m
about
0.9m
20
Cut away shaded
portion, and finish
the edge of the
opening so that
there is no burr.
Connection
Horizontally
perpendicular
to the unit
No nearby heat source and no obstruction near the air outlet is allowed.
The installation height should be at least 2.3m or more from the floor.
The air blown out of the unit should not point directly to animals or plants.
Do not install at a location where there is flammable gas, steam, oil and smoke.
The refrigerating machine oil
is easily affected by moisture.
Use caution to prevent water
from entering the cycle.
Dimension of Mounting Stand
of the outdoor unit
(unit : mm)
500
750
50
330
310
290
500
698
45
300
282
257
6
1
Screw for Mounting Plate
Names of Indoor Components
Names of outdoor Components
AAA Size Battery
Mounting Plate
QtyNo Component’s Name
1
2
Remote Controller
Signal line
1
2
3
4
5
1
Heat insulating materials
1
External dimension of
indoor unit
wall nole
Drain Hose
Drain Hose
wall nole
X10CBK、X13CBK
5
(M4 x 25)
X18CBK
(M4 x 25)
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TINU ROODTUO
s Please mount the Outdoor unit of stable ground to
prevent vibration and increase of noise level.
s Decide the location for piping after sorting out the
different types of pipe available.
Please face this side (suction
side) of the unit to the wall.
Please remove terminal
cover when connecting
the piping and connecting
cord.
Please remove terminal
cover when connecting
the piping and connecting
cord.
CAUTION
s Do not touch the suction
port, bottom surface, or
aluminum fin of the outdoor
unit.
Failure to do so may cause
an injury.
s 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.
RAC-X10CBK
RAC-X13CBK
Pull downward
Please face this side (suction
side) of the unit to the wall.
RAC-X18CBK
12.7 (1/2”)
6.35 (1/4”)
9.52 (3/8”)
Wrench
Torque wrench
Flare nut
Half union
Female side
Male side
Remove the flare nut from the pipe of the indoor unit by removing the flare nut
(female side)
with a spanner while holding down the half union (male side)
with a spanner.
Do not crush the pipe while bending it.
Apply refrigerant oil on the connection part. After carrying o ut the center
alignment and
manual tightening of the flare nut, tighten the flare nut
securely with a torque wrench (spanner).
* Tightening torque must be as shown in the table below.
Outer diameter TORQUE.sM
)mcfgk( )ø( epip fo
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)
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
”
) 19.6~24.5 (200~250)
Valve core cap 12.3~15.7 (125~160)
Valve
head
cap
s
CAUTION
Remove burr
If burr is not removed, it may cause leakage.
Point the side to be trimmed downwards during trimming to
prevent copper chips from entering the pipe.
Copper pipe
Die
A
Die
Before flaring,please put on the flare nut.
Please use exclusive tool for refrigerant R410.
Outer Diameter
A (mm) Rigid Flaring Tool
For R410A tool For R22 tool
1 Preparation of Pipe
Pipe Connection
2
Copper pipe
Trimming tool
Use a pipe cutter to cut the pipe and
remove burr.
Valve head cap
for the service
valve at small
diameter side
Valve head
cap for the
service valve
at large
diameter side
Cap of valve core
Removal Of Air From The Pipe And Gas Leakage Inspection
3
When removing flare nut of the indoor unit, first remove the nut of small diameter
side.
Prevent water from entering into the piping when connecting.
Be sure to tighten the flare nut to the specified torque with a torque wrench.
If the flare nut is overtightened, it may split after sometime and may cause refrigerant leak.
When using a control valve, make sure that the packing is not deteriorated and
avoid excessive
tightening of the handle. Otherwise, gas may leak from the service
valve.
From the viewpoint of global environment
protection, air purge type should be vacuum
pump method.
1
Remove the valve head cap
of the service valve.
Remove the cap of valve core
and
connect the charge hose.
Connect the vacuum pump
adapter to the vacuum pump
and connect the charge hose
to the adapter.
Loosen the spindle of the service valve with small
diameter by 1 / 4 turn and tighten the spindle
immediately after 1 to 2 seconds.
Remove the charging hose from the service valve.
Unscrew the spindle of both the
service valves in anticlockwise
direction to allow the flow of
refrigerant (unscrew halfway).
Tighten the cap of valve head.
Check and make sure that there
is no gas leakage.
Fully tighten the “ Hi ” shuttle of the
manifold valve and completely unscrew
the “Lo” shuttle. Run the vacuum pump.
(Adapter is switched on)
Make sure the meter
reaches -0.1MPa (-76cmHg)
during pumping.
Closed
When pumping starts, slightly loosen
the flare nut to check if air sucked in.
Meter showing pressure
R410A Manifold valve
Vacuum pump
Ball valve
Vacuum pump adapter
Charge hose
Ball valve
Valve
Please leave the ball valve fully
open at all times.
3
4
2
Body of service valve
Hexagonal
wrench key
Cap of valve
head
Cap of valve
head
Cap of
valve core
Works to be done when transferring or removing air conditioner
From the viewpoint of global environment protection, refrigerant
should be recovered (pumped down) when the air conditioner is
transferred or removed.
Perform force-cooling operation (refer to “Force-cooling operation”
on page 12) for about 5 minutes as a preliminary operation.
Tighten the spindle of the service valve at small diameter side in
clockwise direction.
Continue the force-cooling operation for another 1-2 minutes, and
then tighten the spindle of the service valve at large diameter side
in clockwise direction.
Stop the force-cooling operation.
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. (Be sure to use R410A
detector.)
After pumping for about 10 -15 minutes,
completely loosen the “ Lo ” shuttle and
switch off the vacuum pump . (Adapter is
switched off)
Otherwise the nut of big diameter side will fly out.
CAUTION
VOMER RIA DNA SEPIP TNALOOC FO NOITALLATSN
LAI
LAVOMER
RIA
Procedures of Wiring
Wiring Of The I ndoor Unit
s
s
WARNING
Detail of Cutting the Connecting Cord
s If the supply cord is damaged, it must be replaced by a special cord (Maker’s service parts) available from the manufacturer
or its service agent.
s 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.
s Be sure to use only wire specified for the use of air-conditioner.
s Please refer to the manual for wire connection, the wiring technique should meet the standard of the electrical
installation.
s Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band.
s 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.
s There is a AC voltege of 220V between the A and B terminals. Therefore, before servicing, be sure to remove the plug from
the AC outlet.
30mm
10mm
70mm
30mm
10mm
10mm
Line cord
Indoor Unit
Outdoor Unit
ø2.0
Connecting Cord
Green + Yellow
Green + Yellow
Indoor Unit
Outdoor Unit
s
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.
s
Remove the cover from the
terminal base and screw
the cable.
Screw
Insulating plate
Cord band
Connecting cord
Securely screw in the power cord and 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.
When putting two connecting cords
through the band.
WARNING
After wiring the in door uni t, make sure to reattach the
terminal cover.
6
After remove the screw
and terminal cover, and
put the connecting cords
and fix the terminal cover
with screw.
$%
6
A
B
Earth
Connecting cord
Terminal cover
Terminal cover Screw
Wiring of the Outdoor Unit
Please remove the side cover and terminal cover for wiring connection.
WARNING
s
The connecting cord must be fix with cord band
Otherwise rain water may enter and cause short circuit. Besides, an external
forcemay apply to the connection part of the connecting cord and could result
in heat and fire.
s
The terminal cover and side cover must be installed after work is
done.
Terminal cover
Terminal marking
Cord band
IMPORTANT
Fuse Capacity
16A time-delay fuse
CAUTION
s
Outdoor supply cords shall not be lighter than polychloroprene
sheathed flexible cord with code designation 60245 IEC 57.
Wiring for the horizontal piping from the right side.
Not to interfere with the
drain hose, fold the cable at
the drain hose side of the
electric box as shown in the
left figure, and pass the
cable just over the electric
box and pull it out.
Cable
Pipe
Drain
Power cord
Electric box
Cable
Power
cord
Pipe
Drain
hose
Form the cable properly so that the
low cover won
’ t touch the cable in
installation.
Piping and drain hose layout
s Pull at the and in the directionsas
shown by arrows to remove the cover.
Method to remove the low cover
/
1
A
B
6
A
B
6
X10CBK、X13CBK X18CBK
Connecting cord
Connecting cord
Earth
Earth
DROC REWOP FO NOITCENNOC
Insulation And Maintenance Of Pipe Connection
1
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 plastic tape
as shown in the figure of installation of both the indoor and
outdoor units. Then fix their position with holders.
To enchance 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.
Earth Line And Circuit Breaker
2
Power Source And Operation Test
3
The earth line terminal of the outdoor unit is below the
service valve.
To avoid short circuit, it is necessary to install circuit breaker
depending on the mounting location of the unit.
Do not place earth line near the following objects:
(1) Water pipe
(2) Gas pipe — There is danger of catching fire.
(3) The earth line of lightning conductor and telephone —
short circuit may occur during lightning.
Power Source
Do not alter the plug of power cord.
Do not make extension to the power cord.
Please use a new socket. Accident may occur due to the
use of old socket because of poor contact.
Please plug in and then remove the plug for 2 – 3 times.
This is to ensure that the plug is completely plugged into
the socket.
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.
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.
Insulation material for pipe connection
Sleeve of
protection
pipe
Putty
CAUITON
WARNING
CAUTION
X10CBK、X13CBK
X18CBK
Screw
Screw
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.)
Please remove side cover
NOITALLATSNI FO EGATS LANIF
(Only RAC-X18CBK)
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