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Hitachi RAF-35RXB Installation Manual

RAF-25RXB\ RAF-50RXB

Made by: Hitachi
Type: Installation Manual
Category: Air Conditioner
Pages: 2
Size: 1.44 MB

 

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< 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  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.

 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

m

m5

~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  section  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  baseboard  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

Drain  hose

make  lower

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  screw.  (Be  sure  to  install  PIPE  SUPPORT  to  prevent
rodents from entering the indoor unit.)

To  prevent  the  pipe  connector  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

ss

el r

m

m4

81

55mm

Screw (3 pieces)

 Binder

Flare

insulator

Wrap  flare  insulation,
bind  top  and  bottom
flare  insulation  by
binder. Wrap  tape  on
flare insulation closely.

 Binder

Pipe

Sideways piping.

12

0

16

0

R6

0

40

13

0

R8

0

Top view

Front view

Right side view

Wall

ll

a

W

ss

el r

m

m0

51

Floor

40

10

0

R8

0

170

ss

el r

m

m0

81

Large pipe

Small pipe

ke a hole on the wall.

Before piping.

After piping.

In the case of make

a hole on the floor.

40

28

0

Floor

40

ll

a

W

ll

a

W

 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, right 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  controller  far  away  from  high-
frequency 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  configuration  may  be  in  three
different directions: direct rear piping,
right  downward  piping  and  right
sideways piping.

(For example: Wall installation)

12

 Sheet

Be sure to completely
seal  any  gap  with
putty.

Drain pipe
Must be installed separately.
Insulate  indoor  part  of  pipe
to prevent condensation.

The  indoor  piping  should  be
insulated  with  the  enclosed
insulation pipe. (If the insulator
is  insufficient,  please  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

  Measuring  Tape    Knife    Saw   

ø

65mm  Power

Cutter    Putty    Vinyl  Tape    Pliers      Flare  Tool

Hose       Vacuum Pump

Drill    Hexagonal  Wrench  Key  (

    4mm)    Wrench

      Vacuum Pump Adapter        Manifold Valve       Charge

(14,17,22, 26, 27mm)        Gas  leakage  Detector    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.

Explanation  for  outdoor  unit  is  in  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

 


background image

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. Push plug into the holes.

1. Drill 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

m

m8.

4

ø

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)

)

0

6

1

 

 

5

2

1

7

.

5

1

 

 

3

.

2

1

p

a

c

 

e

r

o

c

 

e

v

l

a

V

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

m

m0

5

m

m0

74

55mm

Drain Hose

20mm

CAUTION

The  draining  of  the  water  container

inside  the  Indoor  unit  can  be  done

from  the  left. Therefore  the  hanger

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  interior  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  gas  leakage
occurs,  further
tighten 

the

connection to stop
leakage. (Use the
detector  provided
for R410A.)

Gas leakage inspection

ss

el r

m

m4

81

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

m

m8.

4

ø

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