Hitachi RAF-35RXB, RAF-25RXB, RAF-50RXB Installation Manual
< S904 : >
1. Installation of wall penetration and installation of protection pipe
1.1
Hole position
Make a hole on the wall such the
position as shown below, in order
to keep the flow for condensed
water smooth.
1.2 Wall penetration and installation of protection pipe
Drill a ø65mm hole on wall which is slightly tilted
towards the outdoor side. Drill the wall at a small
angle.
Cut th e p rotection pip e a ccording to t he 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.
CAUTION
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.
Indoor
Outdoor
Seal with
putty
mm5~2
WALL
Seal with
putty
Sleeve of
protection pipe
Protection
pipe
2. Installation of the indoor unit
2.1
How to remove the front cover
Please refer to section for details.
Front cover
bushing
Bushing
(2 pieces on
each side)
2.2 Drain pipe
Make sure drain pipe slopes downward so that drain flows smoothly without being trapped in the middle.
The drain hose (connecting port outer diameter: 16mm or 20mm, length: 500mm) is included in the indoor unit. Prepare a drain
pipe as shown in the following figure.
To prevent condensation, the indoor drain pipe should be covered with heat insulation material with a thickness of more than
10mm.
After piping is completed, check to make sure that drain discharges smoothly. Seal the drain pipe tightly with tape to keep dirt out.
Front view Right side view
88
210
96
500
Drain hose
Make sure the drain hose
slopes downward.
Drain pipe (procure locally)
(Unit: mm)
2.3 Connecting the pipe to indoor unit
Draw in the pipes through the hole of the wall or the floor to indoor.
Arrange the pipe shown below. In the case that large pipe and small
pipe arrange to make in front and behind.
The indoor piping should be insulated with the enclosed insulation
pipe.
The pipe should first be cut longer than the length shown below.
The excess sec tion of the pipe should be cut off during pipe
connection.
Remove PIPE SUPPORT.
Insert the drain hose into the hole in the wall.
Winding insulation pipe for drain hose and taping 4 or 5 places to fix.
Connect the pipe to the Indoor unit.
After completing the piping connection, cover the connector with the insulator.
Connect the cord (follow instructions in the section “5. Connection of the connecting cord” on the reverse of this sheet).
WARNING
For sideways piping, do not install the drain hose
sideways. Connect the drain hose so that it comes
out directly.
Sideways installation of the drain hose will prevent it
from sloping downward, causing water leakage. To
avoid dripping, make sure to pass the drain hose
under the pipe.
PIPE SUPPORT
PIPE SUPPORT
Screws
Mount PIPE SUPPORT so that the cylindrical portion of the drain
pan passes through its hole and secure it with screws located at
the right back corner.
Cabinet
For floor piping
For floor piping, cut the
front cover bushing with a
plastic cutter or similar
tool and use a file for an
attractive finish.
For sideways piping
For right sideways piping,
cut the stand’s bushing with
a plastic cutter or similar
tool and use a file for an
attractive finish.
If there is a baseboard
If the bas eboard is
5~15mm in thickness and
115mm or less in height,
cut the pipe bushing to
conform to the baseboard.
115
70
5
15
Baseboard
Cabinet
Removal and installation of
front cover
Dra in hos e
mak e low er
than center of
the hole.
Screw (2 pieces)
Hook the PIPE
SUPPORT tab in
the square hole.
Since there is some space between PIPE SUPPORT and
the pipe, affix the insulator to the PIPE SUPPORT.
As shown in the figure on the right, affix the insulator
to the PIPE SUPPORT to sandwich it.
After connecting the pipes and connecting cord, be sure to
screw PIPE SUPPORT tightly and fix the pipes and
connecting cord.
Position the easy-to-attach side of PIPE SUPPORT (after
aligning it with the pipe) to face the front and secure it with
a s crew. (Be sure to install PIPE SUPPORT to prevent
rodents from entering the indoor unit.)
To prevent the pipe connec tor from contacting the front
cover, push the connector as far as it goes.
Arrange the connecting cord, pipes and drain hose neatly
and store them in the bottom section of the rear surface of
the indoor unit.
Indoor unit rear surface
Pipe layout of the unit rear surface
Connecting cord
Insulator
Connecting cord
Pipe
Drain hose
Pipe/drain hose layout when passing through the
file in a wall
Pipe
Insulator
Hole Position
In the case of making a hole on the wall. In the case of making a hole on the floor.
80~100mm
65mm
ssel ro mm481
55mm
Screw (3 pieces)
Binder
Flare
insulator
Wrap flare insulation,
bind top and bottom
flare insulation b y
binder. Wrap tape on
flare insulation closely.
Binder
Pipe
Sideways piping.
120
160
R60
40130
R80
Top view Front view Right side view
Wall
llaW
ssel ro mm051
Floor
40100
R80
170
ssel ro mm081
Large pipe
Small pipe
ke a hole on the wall.
Before piping. After piping.
In the case of make
a hole on the floor.
40280
Floor
40
llaW
llaW
CAUTION
When mounting the flare
insulator , make sure there is
a space between the insulator
and left of resin part. Otherwise,
may cause water dripping.
1
(Unit: mm)
above 270
Insulator
PIPE SUPPORT
Connecting section
Screw (3 pieces)
1
2
2
10
10
10
8
8
B
AAA size
Battery
2
Remote Controller
1
Insulator
1
(t3
× 160 × 600)
Screw for Overturn
Prevention
2
(4.0 × 34)
Insulator
1
(20
× 30 × 300)
Bush
3
Sheet
3
Air Purifying Filter
1
THE CHOICE OF MOUNTING SITE
(Please note the following matters and obtain permission from
customer before installation.)
WARNING
The unit should be mounted at stable, non-vibratory location
which can provide full support to the unit.
CAUTION
No nearby heat source and no obstruction near the air outlet
is allowed.
The clearance distances from top, r ight and left are specified
in figure below.
The location must be convenient for water drainage and pipe
connection with the outdoor unit.
To avoid interference from noise, please place the unit and
its remote controller at least 1m from the radio and television.
To avoid any error in signal transmission from the remote
controller, please put the contro ller far away from highfrequency machines and high-power wireless systems.
Names of Indoor Components
No. Item Qty
Flare Insulator
1
Binder
2
Screw for Overturn
Prevention
8
(4.1 × 32)
Holder for Remote
Controller
1
Screw for holder of
Remote Controller
2
(3.1
× 16)
13
3
2
1
4
5
6
7
8
9
10
11
12
(Procure locally)
Plug
7
4
6
5
(Procure locally)
Plug
1
14
Hanger
[Indoor unit installation]
Direction of Piping
Piping configu ration may be in three
different directions: direct rear piping,
right d ownw ard piping and r ight
sideways piping.
(For example: Wall installation)
12
Sheet
Be sure to completely
sea l any gap wit h
putty.
Drain pipe
Must be installed separately.
Insulate indoor part of pipe
to prevent condensation.
The indoor piping should be
insulat ed with the enclosed
insulation pipe. (If the insulator
is ins ufficient, ple ase use
commercial products.)
Above 100mm
Above 150mm
Above 200mm
Bush
When mounting on a wall
(up to 150~500 mm from the floor surface)
11
14
RAF-25RXB_EN
SAFETY PRECAUTION
• Read the safety precautions carefully before operating the unit.
• 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.
CAUTION .......... Improper installation may result in serious consequence.
Make sure to connect earth line.
This sign in the figures indicates prohibition.
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 a customer to keep this installation manual together with the instruction manual.
WARNING
• Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire may occur if you do the
installation work yourself.
• Please observe the installation stated in the installation manual during the process of installation. Improper installation may cause
water leakage, electric shock and fire.
• Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may
collapse and impose danger.
• Observe the rules and regulations of the electrical installation and the methods described in the installation manual when dealing
with the electrical work. Use cables which are approved official in your country. Be sure to use the specified circuit. A short circuit and
fire may occur due to the use of low quality wire or improper work.
• Be sure to use the specified cables for connecting the indoor and outdoor units. Please ensure that the connections are tight after the
conductors of the wire are inserted into the terminals to prevent the external force is being applied to the connection section of the
terminal base. Improper insertion and loose contact may cause over-heating and fire.
• Please use the specified components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fire or
stronger vibration may occur.
• Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
• When installing or transferring an air conditioner to another location, make sure that air other than the specified refrigerant (R410A)
does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally
which could result in a rupture and injury.
• Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fire, a poisonous gas may
occur.
• After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the
room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.
• Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner
technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.
• Be sure to connect the earth line from the power supply wire to the outdoor unit and between
the outdoor and indoor unit. Do not connect the earth line to the gas tube, water pipe, lighting rod or the earth line of the
telephone unit. Improper earthing may cause electric shocks.
• When finishing the refrigerant collection (pumping down), stop the compressor and then remove the coolant pipe.
If you remove the refrigerant pipe while the compressor is operating and the service valve is released, air is sucked and a
pressure in the freezing cycle system will build up steeply, causing an explosion or injury.
• When installing the unit, be sure to install the refrigerant pipe before starting the compressor.
If the refrigerant pipe is not installed and the compressor is operated with the service valve released, air is sucked and the
pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury.
CAUTION
•
A circuit breaker must be installed in the house distribution box for the direct connected power supply cables to the
outdoor unit. In case of other installations a main switch with a contact gap of more than 3mm has to be installed.
Without a circuit breaker, the danger of electric shock exists.
• Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire
if flammable gas leaks around it.
• Please ensure smooth flow of water when installing the drain hose. Improper installing may wet your funiture.
• An IEC approved power cord should be used. Power cord type: NYM.
•
•
•
The electric cables should neither be reworked nor added.
Make sure to use an exclusive circuit breaker.
Otherwise fire or electric shock might occur by connection failure, isolation failure or over current.
Make sure to connect cables to terminal properly and terminal cover should close firmly.
Otherwise, over heating at terminal contact, fire or electric shock might occur.
Make sure that there is no dust on any connected points of electric cables and fix firmly.
Otherwise, fire or electric shock might occur.
Tools Needed For Installation Work
Me asur ing Tap e Kn ife Saw ø65m m Pow er
Cutte r
Pu tty V inyl Tap e Plie rs F lare Tool
Hose Vacuum Pump
Dri ll
Hexago nal Wrenc h Key ( 4 mm) Wren ch
Vacuum Pump Adapter Manifold Valve Charge
(
14,1 7,22, 2 6, 27mm) Gas leakage De tector
Pipe
Indoor Unit
HITACHI FLOOR 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.
Explan ation for o utdoor unit is i n the “How To Use”
(Instruction Manual) that packed with outdoor unit.
FOR SERVICE PERSONNEL ONLY
(Mark is exclusive use tool for R410A) Screwdriver
RAF-25RXB
RAF-35RXB
RAF-50RXB
Floor
ø4.8mm
32mm
5. Connection of the connecting cord
(1) Remove the cover of the electric box.
(2) Connect the connecting cords.
(3) Assemble the cover of electric box.
3. Fixing the indoor unit
438
440 155
55
ø9 rear fixing
hole for
anchor bolt or
screw of
accessory.
Fixing on the wall
Case
Fixing the base of indoor unit
Fix the base of indoor unit on the floor with 4.1 × 32mm screws. (Right and left)
2.P ush plug into the holes.
1.Dr ill holes on floor.
(The plug can be secured diagonally with a screw as shown above.)
WARNING
Be sure to attach screw to prevent
the indoor unit from overturn.
3
When fixing the indoor unit above
the ground, be sure to fix an L-angle
at the bottom to support it.
Screw (4.1x32)
Indoor unit
Plug (Procure locally)
If outlet is covered with the lattice door, room temperature may not be controlled
properly. Therefore, air outlet must be open as much as possible.
If air deflector of air outlet is adjusted too much upward, room temperature may
not be controlled properly due to the heat inside the lattice door. Therefore, the
deflector must be adjusted to nearly horizontal angle.
If signal receiver is covered with the lattice door, signal receiving distance or
range (angle) becomes smaller. Therefore, signal receiver must not be covered
with the lattice door.
Only the vertical lattice door may be used. Be sure to use a lattice door with an
open area ratio of 75% or more. If another lattice door or one with an open area
ratio of less than 75% is used, maximum performance may not be obtained.
With a built-in installation, it may take more time to reach the set temperature
after the unit is switched on.
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.
Please ensure the smooth flow of condensed water of the Indoor unit during installation.
(Carelessness may result in water leakage.)
CAUTION
WARNING
Be sure that the hose is not loosely
connected or bent.
6. Checking of drawing drain hose
(1) Connect the separate drain hose to the drain hose that is attached to the indoor unit.
(2) For keeping the smooth flowing of condensed water the drain hose should be inclined as shown in figure below.
7. 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.
8. Final stage of installation
8.1
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.
8.2 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.
Sleeve of
protection pipe
Putty
Putty
OUTSIDE INSIDE
Horizontal air deflector (Air intake)
Signal receiver
Above
100mm
Above 200mm
Above 150mm
Lattice door
Screw
Screw
Screw (4.1x32)
Horizontal air deflector (Air outlet)
3-3 Built-in Installation
Direct Mounting On The Wall
Procedures of Installation and Precautions
Procedures to fix the hanger and indoor unit.
1.Drill holes on wall.
(As shown below)
2.Push plug into the holes.
(As shown below)
3.Fix the hanger on wall with 4.1 X
32 and 4.0 X 34 screw.
(As shown in figure below)
Wall
mm8.4ø
32mm
Wall
Plug
Hanger
Screw
(4.1x32)
4. Installation of refrigerating pipes and air removal
4.1
Preparation of pipe
Use a pipe cutter to cut the copper pipe.
fore flaring, please put on the flare nut.
Trimming tool
Copper
CAUTION
Jagged edge will cause leakage.
Point the side to be trimmed downwards during trimming to
prevent copper chips from entering the 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
4.2 Pipe connection
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.
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.
CAUTION
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
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)
cap
12.7 (1/2") 29.4 – 34.3 (300 – 350)
)061 – 521( 7.51 – 3.21pac eroc evlaV
Trial run should be conducted on one unit at a time to check for incorrect wiring of connecting cord.
CAUTION
Screw
(4.1x32)
Fixing on the hanger
3.2 Wall Installation
3.1 Floor Installation
30mm
Air conditioner
External dimension of
indoor unit
20mm
750mm
mm05
mm074
55mm
Drain Hose
20mm
CAUTION
The draining of the water container
inside the Indoor unit can be done
from th e left. Therefore the hange r
must be fixed horizontally or slightly
tilted towards the side of drain hose.
Otherwise, condensed water may
overflow the water container.
A
Die
Please use exclusive tool.
Copper pipe
Die
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 int erior of the cord requiring
replacement.
THIS APPLIANCE MUST BE
EARTHED.
WARNING
Bending
upwards
Bad
Condensed
water pond
Bad Bad
Condensed
water pond
Bad
Ditch
Remote Controller
Holder
Screw (2 pieces)
Remote Controller
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
Push the latch at both sides to open the front panel. Pull out the filter and remove 3 screws. Lift up the front panel and latch the claws
firmly at the lower part of rear of the front
panel.
Then remove 3 screws.
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.
Set the upper louver in open position.
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.
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.
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
How to connect the optional parts (H-LINK RAC Adapter, Dry contact, Wired Remote Controller)
For cable connection to control P.W.B., you need to remove front cover and electrical box cover.
Each connecting location is as below.
Dry contact: CN6
H-LINK RAC Adapter: CN7
Wired Remote Controller: CN20
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.
Flare nut
Wrench
Torque wrench
Please use gas leakage detector to check
if leakage occurs at connection of flare nut
as shown on the right.
If ga s l eakage
occur s, fu rth er
tighte n the
connection to stop
leakage. (Use the
detector provided
for R410A.)
Gas leakage inspection
ssel ro mm481
Please remove 3 screws and clip
which fix the stand and cabinet.
(As shown in the figure below)
Please remove the screws which fix
the cabinet and hanger.
Please use hidden beams in the wall
to hold the hanger.
Hole for pipe
Hanger
Mark
Level
Line
Weight
Screw for Hanger
Please use more
than 6 screws
Screw
(4.1x32)
1. Drill holes on wall.
(As shown below)
2. Push plug into the holes.
(As shown below)
Wall
mm8.4ø
32mm
Wall
Cabinet
Screw
(4.1x32)
Screw (4.1x32)
Screw
(4.1x32)
Screw
(4.1x32)
Screw
(4.1x32)
4.Fix the indoor unit on the
wall with 4.1x32 screw.
Plug
Screw
(4.0x34)
Screw
(4.0x34)
3
3
3
9
3
3
3
9
3
1
3
3
2
1
2
3
3
4
1
2
3
5
4
3
2
1
3
< S904 : >
B
The remote controller
must be slide in the remote
controller holder, in the
direction as shown in the
lower end of the remote
figure, until it hooks at the
controller holder.
RAF-25RXB_EN
Detail of cutting the connecting cord
35mm
10mm
10mm
70mm
1
2
3
Connecting cord
Green + Yellow
(ground)
Connecting cord
1
2
3
Cord band
Earth
Connecting cord
CN20
CN7
CN6
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