background image

Screw for Mounting Plate

( 4 . 1 x 3 2 )

HITACHI SPLIT-UNIT AIR CONDITIONER 

INSTALLATION MANUAL

(     mark is tool exclusive use for R410A)

 

   

  +   –  Screwdriver 

   

   

 Measuring Tape 

   

 

 Knife   

 Saw  

 

 Pipe Cutter 

 Hexagonal Wrench Key ( 

 4mm)

 

 Power Drill (ø 65mm ~ ø 80mm)   

 Vacuum Pump 

 Pliers or Wrench 

 Torque Wrench 

 Vacuum Pump 

Adaptor 

 Flare Tool 

 

 Gas Leakage Detector 

 Manifold Valve 

   

 Charge Hose  

 Carefully read through the procedures of proper 

installation before starting installation work.

 The sales agent should inform customers regarding 

the correct operation of installation.

Tools Needed For Installation Work

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.

WARNING

  The outdoor unit must be mounted at a location which can support 

heavy weight. Otherwise, noise and vibration will increase.

CAUTION

 No nearby heat source and no obstruction near the air outlet is 

allowed.

 The clearance distances from top, right and left are speci

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 ed  in 

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 gure  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, television and inverter 
type 

fl

 uorescent  lamp.

  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.

 The installation height of indoor unit must be 2.3m or more in a 

non public area. 

CAUTION

 Do not expose the unit under direct sunshine or rain. Besides, 

ventilation must be good and clear of obstruction.

 The air blown out of the unit should not point directly to animals 

or plants.

 The clearances of the unit from top, left, right and front are 

speci

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 ed  in 

fi

 gure below. At least three of the above sides must 

be open air.

 Be sure that the hot air blown out of the unit and noise do not 

disturb the neighbourhood.

  Do not install at a location where there is 

fl

 ammable gas, steam, 

oil and smoke.

 The location must be convenient for water drainage.

 Place the outdoor unit and its connection wire at least 1m away 

from the antenna or signal line of television, radio or telephone. 
This is to avoid noise interference.

INDOOR UNIT

Names of Indoor Components

The Length of Indoor Unit 

Power Cord

Do not alter the power cord.

Direction of Piping

Figure showing the Installation 
of Indoor and Outdoor Unit

 The difference in height 

between the indoor and 
outdoor unit should be 
kept max. 10m.

 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.

T h e r e   a r e   4   d i r e c t i o n s  
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.

<

IA1156: A 

>

Screw for Remote 
Controller

( 3 . 5 x 1 8 )

AAA Size Battery

Mounting Plate

Qty

No.

Component’s Name

1

6

2

2

Remote Controller

Indoor Unit

 Outdoor Unit

RAS-F10CF

In case the pipe length is more than 8m, add refrigerant R410 
at 10 gram per every meter exceeds. However, pipe length shall 
not exceed 15m.

CAUTION

1

2

3

4

5

6

1

Installation of Hanger, Wall Penetration and Installation of Protection Pipe

1

CAUTION

  The draining of the water container inside the indoor unit can be done from the left. 

Therefore the mounting plate must be 

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 xed horizontally or slightly tilted towards the 

side of drain hose. Otherwise, condensed water may over

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 ow 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.

   Installation of the Indoor Unit

2

VERTICALLY DOWNWARD PIPING

 

 Preparation

 Connect connecting cord.

 Pull out the pipe, connecting 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.

!

CAUTION

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 

fi

 gure 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).

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

 The refrigerating pipes should be adjusted to 

fi

 t 

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. Then the 
pipes are wrapped with insulation pipe.

 Connect the connecting cord after removing electrical 

cover. (Refer to “CONNECTION OF POWER CORD”)

 After  adjustment, 

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 t the connecting cord and pipes 

into the space available under the indoor unit. Use 
holder to hold them tight.

CAUTION

 The rubber strap used for 

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 xing the insulator should 

not be tied with great force. 
Otherwise, this will damage 
heat insulation and causes 
water condensation.

 

Holder can be attached at the either of 2 places. 
Please select the easier position.

THE CONNECTION OF REFRIGERATING PIPE DURING THE 
INSTALLATION OF INDOOR UNIT

Preparation To Install Refrigerating Pipes

CAUTION

 Please 

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 x in the plastic core 

after 

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 aring to avoid copper 

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 

fl

 ow of condensed water of the Indoor 

unit during installation. (Carelessness may result in water leakage.)

CAUTION

Be sure that the 
drain hose is not 
loosely connected 
or bend.

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.
Unless it seals completely, 
any air with high humidity 
flows from outdoor and 
any dew may drop.

WARNING

 Refer to below diagram for the connecting 

refrigerating pipes and cord arrangement.

 The end of the refrigerating pipes are at locations 

marked with “ 

   

 ” symbol.

   Installation of Drain Hose

3

  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.

 Wrap the refrigerating pipes with insulation pipe after 

connecting refrigerating pipe.

 Connect the connecting cord after removing electrical cover. 

(Refer to “Connection of Power Cord”)

 After adjustment, the connecting cord and refrigerating pipes 

are placed into the space available under the Indoor unit.

  The projection of Indoor unit must hook to the mounting plate.

INDOOR UNIT

HOW TO REMOVE INDOOR UNIT

 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 

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 gure)

CAUTION

Condensed water may leak out if not inserted properly.

HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS

 During horizontal or downward piping, use a knife to cut 

openings as shown in 

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 gure. Then smoothen the edges of 

openings with a 

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 le.

 Turn the piping while holding down the 

lower portion of pipe-support by hand.

Heat insulation pipe

Refrigerating pipe

Pull this to the 
front during the 
connection of 
refrigerating pipes 
to ease task.

RAC-F10CF

1

Holder

Dimension of Mounting Stand

of the Outdoor unit

Procedures of Installation and Precautions

 Procedures to 

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 x the mounting plate.

1.  Drill holes on wall. 

2.  Push plug into the holes. 

   (As shown below) 

 

(As shown below) 

 

     

 

 

 

3.  Fix the mounting plate on wall with 4.1 x 32 screw
   (As shown in 

fi

 gure  below)

Connecting
cord

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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.

  Be sure that the unit operates in proper condition after installation. Explain to customer the proper way of 

operating the unit as described in the user’s guide.

!
!

This air conditioner uses new refrigerant HFC (R410A)

The basic installation work procedures are the same as conventional refrigerant (R22) models.
However, pay careful attention to the following points:

(1)  Since the working pressure is 1.6 times higher than that of conventional refrigerant (R22) models, some of the piping and installation and service 

tools are special. 

 

Especially, when replacing a conventional refrigerant (R22) model with a new refrigerant R410A model, always replace the conventional piping 
and 

fl

 are nuts with the R410A piping and 

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 are  nuts.

(2)  Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with conventional refrigerant (R22) 

and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]

(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant (R410A) models. Also, when storing the piping, securely seal the 

openings by pinching, taping, etc.

(4)  When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and always charge from the 

liquid phase side  whose composition is stable.

  Please request your s

ales ag

ent or quali

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 ed technician to install your unit. Water leakage, short circuit or 

fi

 re may occur if you do the installation 

work yourself.

  Please observe the instructions stated in the installation manual during the process of installation. Improper installation may cause water leakage, 

electric shock and 

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 re.

  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 power cables approved by the authorities of your country.

  Be sure to use the speci

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 ed wire 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. Improper insertion and loose contact may cause over-heating and 

fi

 re.

  Please use the speci

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 ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock and 

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 re may occur.

  Be sure to use the speci

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 ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

  When installing or removing an air conditioner, only speci

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 ed refrigerant (R410A) shall be allowed, do not allow air or moisture to remain in the 

refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture may be caused.

  Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with 

fi

 re, 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 

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 re in the fan-driven heater, space heater, etc., a poisonous gas may occur.

 Unauthorized modi

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 cations to the air conditioner may be dangerous. If a breakdown occurs please call a quali

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 ed air conditioner technician or 

electrician. Improper repairs may result in water leakage, electric shock and 

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 re,  etc.

WARNING

CAUTION

  A circuit breaker or fuse (16A time delay) must be installed. Without a circuit breaker or fuse the danger of electric shock exists.

  A main switch with a contact gap of more than 3mm has to be installed in the power supply line to the outdoor unit.

  Do not install the unit near a location where there is 

fl

 ammable gas. The outdoor unit may catch 

fi

 re  if 

fl

 ammable gas leaks around it.

  Please ensure smooth 

fl

 ow of water when installing the drain hose.

  Piping shall be suitable supported with a maximum spacing of 1m between the supports.

!

!

INS RAS-F10CF (EN1)   1

INS RAS-F10CF (EN1)   1

11/14/14   11:01 AM

11/14/14   11:01 AM

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