Hitachi RAK-70PPA, RAC-70WPA Installation manual

FOR SERVICE PERSONNEL ONLY

● Carefully read through the procedures of proper

installation before starting installation work.

● The sales agent should inform customers regarding

the correct operation of installation.

SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

Indoor Unit Outdoor Unit

RAK-70PPA RAC-70WPA

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.

WARNING

● Please request your sales agent or quali ed technician to install your unit. Water leakage, short circuit or  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  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 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

re.

and 

● Please use the speci ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock

re may occur.

and 

● Be sure to use the speci ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

● When installing or removing an air conditioner, 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  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 

● Unauthorized modi cations to the air conditioner may be dangerous. If a breakdown occurs please call a quali ed air

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

● A circuit breaker or fuse (30A 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  ammable gas. The outdoor unit may

catch  re if  ammable gas leaks around it.

● Please ensure smooth  ow of water when installing the drain hose.

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

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

CAUTION

Tools Needed For Installation Work

● + – Screwdriver ● Measuring Tape ● Knife

● Saw ● ø 65mm Power Drill ● Allen Key ( 4mm)

● Wrench (14, 17, 19, 22mm)

● Gas Leakage Detector ● Pipe Cutter

● Plastic Tape ● Pliers ● Flare Tool

 re, etc.

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.

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

allowed.

● The clearance distances from top, right and left are speci ed in



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

INDOOR UNIT

remote controller at least 1m from the radio, television and inverter

uorescent lamp.

type 

● 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.

CAUTION

Names of Indoor Components

QtyNo. Component’s Name

Mounting plate

Screw for Mounting Plate

Remote Controller Holder

AAA Size Battery

Screw for Remote Controller Holder

Remote Controller

Air Purifying Filter

(4.1x32)

Direction of Piping

There are 6 directions allowed, namely, horizontally perpendicular to the unit,

vertically down from right, horizontally out from right and horizontally out to left.

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

Names of Outdoor Components

QtyNo. Item

Bush

Drain Pipe

● The Outdoor unit must be mounted at a location which can sup-

port heavy weight. Otherwise, noise and vibration will increase.

●

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 ed in  gure below. At least 3 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  ammable gas, steam, oil and

smoke.

OUTDOOR UNIT

●

The location must be convenient for water drainage.

●

Place the Outdoor unit and its connecting cord at least 1m away from the antenna or signal line of television, radio or telephone. This is to avoid noise interference.

●

Do not install outdoor unit facing strong wind direction. It may damage the fan motor

Figure showing the Installation of Indoor and Outdoor Unit

WARNING

CAUTION

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

● The difference in height

between the indoor and outdoor unit should be kept max 20m.

● The connecting pipe,

no matter big or small, should all be insulated with insulation pipe and then wrapped with vinyl 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).

Installation of Mounting Plate, Wall Penetration and Installation of Protection Pipe

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

Therefore the mounting plate must be  side of drain hose. Otherwise, condensed water may over ow the water container.

Direct Mounting On The Wall

● Please use hidden beams in the wall to hold the mounting plate.

Procedures of Installation and Precautions

● Procedures to  x the mounting plate.

1. Drill holes on wall. 2. (As shown below)

CAUTION

xed horizontally or slightly tilted towards the

Push plug into the holes. 3. Fix the mounting plate on (As shown below) wall with 4.1 x 32 screw

(As shown in  gure below)

INDOOR UNIT

● Procedures to  x the holder of remote control.

1. Drill holes on wall. 2. Push plug into the holes. (As shown below)

Wall Penetration and Installation of Protection Pipe

● Drill a ø 80mm 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.

(As shown below)

WARNING

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.

Installation of the Indoor Unit

DIRECTLY BACKWARD AND DOWNWARD PIPING

Preparation

● Connect connecting cord.

● Pull out the pipe, connecting cord and drain hose.

● Arrange a drain hose in lowest part of a wall hole.

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.

CAUTION

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.

HOW TO REMOVE INDOOR UNIT FROM HANGER

● Push up PUSH section on the bottom of indoor

unit, then claws are released from hanger (Indicated by 2 arrows in the drawing on the right.)

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  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).

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  openings with a  le.

gure.

Then smoothen the edges of

● Turn the piping while holding down the lower

portion of pipe-support by hand.

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

● The refrigerating pipes should be adjusted to  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. pipes are wrapped with insulation pipe.

● Connect the connecting cord after removing electrical

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

● After adjustment,  t the connecting cord and pipes

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

Layout of pipe

● Holder can be attached at the either of 2 places.

Please select the easier position.

Then the

Layout of pipe

CAUTION

●

The rubber strap used for  xing the insulator should not be tied with great force. Otherwise, this will damage heat insulation and causes water condensation.

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT

Preparation To Install Refrigerating Pipes

● The refrigerating pipes and connecting cord

transform and are attached.

● The end of the refrigerating pipes are at locations

marked with

” symbol.

“

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. Use holder to hold them tight.

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

Heat insulation pipe

Connecting cord

Refrigerating pipe

Installation of Drain Hose

You are free to choose the side (left or right) for the installation of drain

CAUTION

hose. Please ensure the smooth  ow of condensed water of the Indoor unit during installation. (Carelessness may result in water leakage.)

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

CAUTION

● Please  x in the plastic core

after 

aring to avoid plastic

chips entering the pipes.

CAUTION

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

IA926: A

HITACHI



● Please mount the outdoor unit on

stable ground to prevent vibration and increase of noise level.

● Decide the location for piping after

sorting out the different types of pipe available.

● Open the side plate by unscrewing

the screws as shown below.

CAUTION

Please make sure to remove all spacers inside the unit.

● Open the Top, Back and Side

cover of the unit.

● Pull out the spacers inside.

(Spacers are only for transportation

purpose).

If not remove, vibration and noise

will occur.

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT

 There are holes on the base of Outdoor unit for condensed water to exhaust.  In order to  ow 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  gure. Join the drain pipe to one hole.

OUTDOOR UNIT

 At  rst insert one portion of the hook to the base (Portion A), then pull the

drain pipe in the direction shown by the arrow while inserting the hook into the base. After installation, check whether the drain pipe cling to the base  rmly.

BASE

DRAIN PIPE

 When using in cold region, etc.

In cold region with severe cold climate and heavy snow, water discharged

from heat exchanger freeze on the base surface and this may affect drainage. In such a region, remove bush on the bottom face of outdoor unit for better drainage. When using drainpipe, consult our dealer.

Please face this side (suction side) of the unit to the wall.

Pull downward

Top cover

Please remove side cover when connecting the piping and connecting cord.

Back cover

Side cover

Preparation of Pipe

● Use a pipe cutter to cut the copper pipe.

CAUTION

● Jagged edge will cause leakage.

● Point the side to be trimmed downwards during trimming to prevent copper

chips from entering the pipe.

● Before  aring, please put on the  are nut.

● Please use exclusive tool

Outer Diameter mm (inch)

6.35 (1/4")

9.52 (3/8")

12.70 (1/2")

15.88 (5/8")

Pipe Connection

CAUTION

● Please be careful when bending the copper pipe.

● Screw in manually while adjusting the center. After that, use of torque wrench to

tighten the connection.

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

Thickness

In case of removing  are nut of an Indoor unit,  rst remove a nut of small diameter side, or a seal cap of big diameter side will  y out. Prevent water from entering into the piping when working.

(mm)

0.8

1.0

Small dia. side

Large dia. side

Valve

head cap

Valve core cap

Flare tool for R410A

Clutch type

~ 0.5

0.0

~ 0.5

0.0

~ 0.5 ~ 0.5

0.0

Small dia. side

Large dia. side

A (mm)

Conventional  are tool

Clutch type

1.0 ~ 1.5

Outer

dia.of pipe

6.35 (1/4")

9.52 (3/8")

12.70 (1/2")

15.88 (5/8")

6.35 (1/4")

9.52 (3/8")

12.7 (1/2")

14.0 – 18.0 (140 – 180)

33.0 – 42.0 (330 – 420)

50.0 – 62.0 (500 – 620)

63.0 – 77.0 (630 – 770)

19.6 – 24.5 (200 ~ 250)

29.4 – 34.3 (300 – 350)

12.3 – 15.7 (125 ~ 160)

Wing nut type

1.5 ~ 2.0

1.5 ~ 2.5

Torque N·m

(kgf

cm)

Removal Of Air From The Pipe And Gas Leakage Inspection

Procedures of using Vacuum Pump for Air Removal

As shown in right  gure, remove the cap of valve core. Then, connect the charge hose. Remove the cap of valve head. Connect the

vacuum pump adapter to the vacuum pump and connect the charge hose to the adapter.

Fully tighten the “Hi” knob of the manifold valve and completely unscrew the “Lo” knob. Run the vacuum pump for about 10~15

minutes, then completely tighten the “Lo” knob and switch off the vacuum pump.

Remove the charge hose and tighten the cap of valve core. Check the cap’s periphery if

there is any gas leakage.

AIR REMOVAL

Completely unscrew the spindle of the service valve (at 2 places) in anti-clockwise

direction to allow the  ow of refrigerant (using Hexagonal Wrench key).

Re-cap the service valve and tighten using wrench. Check the cap’s periphery if there is

any gas leakage. The task is then completed.

When the meter reaches - 101KPa (-76cmHg) during pumping, fully tighten the shuttle.

Valve

When pumping starts, slightly loosen the  are nut to check of air sucked in. Then tighten the  are nut.

Charge hose

Meter showing pressure

Vacuum pump adapter

Gas Leakage Inspection

Please use gas leakage detector to check if leakage occurs at the connection of Flare nut as shown on the right.

If gas leakage occurs, further tighten the connection to stop leakage.

Valve

Closed R410A

Manifold valve

Vacuum pump

WARNING

● THIS APPLIANCE MUST

BE EARTHED.

Procedures of Wiring

In case that power is supplied from Indoor Unit

Power line Control line

Indoor

Unit

GRN + YEL

Strip wires

Outdoor

Unit

GRN + YEL

CONNECTION OF POWER CORD

●

The naked part of the wire core should be 10 mm and  x

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 power cables approved from the

authorities in your country. For example in Germany: Cable type: NYM 3x1.5mm

●

Please refer to the installation manual for wire connection

to the terminals of the units. The cabling must meet the standards of electrical installation.

●

There is a AC voltage of 220-240V between the L, N, A and

B terminals. Therefore, before servicing, be sure to remove the plug from the AC outlet or switch off the main switch.

WARNING

, (fuse = 30A time delay)

Wiring Of The Indoor Unit

●

For wire connection of the Indoor unit, you need to remove front panel and electrical cover.

Method to remove front panel

●

Refer to “FINAL STAGE OF INSTALLATION – How to Remove The Front Cover”.

Method to remove electrical cover

●

Remove the screw and electrical cover.

●

Insert the connecting cord (A, B, C, D) from the bottom of unit.

●

Fixed the wire to terminal wires  rmly as shown in  gure at

right side.

ScrewElectrical coverScrew

Wiring of The Outdoor Unit

● Please remove the side cover for wire connection.

● If you cannot attach the side cover

due to the connecting cord, press the connecting cord in direction to the front

WARNING

panel to  x it.

● Be sure that the hooks of the side cover

is  xed in certainly. Otherwise water 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 gauges list below for the lead-in from a pole transformer and for the wiring from a switch board of fuse box to the main switch and outdoor unit in consideration of the locked rotor current.

IMPORTANT

Cable length

16m

up to up to 15m up to 25m

Wire cross-section

1.5mm

2.5mm

4.0mm

Connect the earth cord

After remove the screw and band, put the connecting cords and  x the band with screw.

● Investigate the power supply capacity and other

electrical conditions at the installation 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

outlet. In localities where electrical conditions are poor, use of a voltage regulation is recommended.

ABCD

Earth terminal

IMPORTANT

Fuse Capacity

30A time delay fuse

CAUTION

Outdoor supply cords shall not be lighter than polychloroprene sheathed  exible cord with code designation 60245 IEC 57.

How To Connect The Optional Parts

(RAC Adapter, Wired Remote Controller)

H-LINK

[For all optional part, please refer catalog for part number]

As for connecting to H-Link, a separately purchased RAC Adapter is required.

● To install the wiring the electrical box cover must be opened.

● Connect the connector of RAC adapter to CN1101.

● Assemble back the cover of electrical box.

● Please refer to the respective user manual of RAC Adapter

for further details.

● Please be careful not to damage lead wires by edge of

plate when connecting the optional parts.

WIRED REMOTE CONTROLLER

[For all optional part, please refer catalog for part number]

Connection to the electrical box:

● Remove the cover of electrical box.

● Connect the connector of wired remote controller to CN1102.

● Assemble back the cover of electrical box.

● Please refer to the respective user manual of wired remote

controller for further details.

● Please be careful not to damage lead wires by edge of

plate when connecting the optional parts.

Insulation And Maintenance Of Pipe Connection

● The connected terminals should be completely 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  gure showing the installation of Indoor and Outdoor units. Then  x 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.

Power Source And Operation Test

Power Source

FINAL STAGE OF INSTALLATION

● 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  x the power cord with U-shape nail.

IA926: A

CAUTION

Installation Of Remote Controller

● The remote controller can be placed in its holder which is

 xed 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  xed. The unit will beep when signal is received from the remote controller. The signal transmission is weaken by the  uorescent 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.

The remote controller must be slide in the remote controller holder, in the direction as shown in the  gure, until it hooks at the lower end of the remote controller holder.

Screw (2 pieces)

Remote Controller

Remote Controller Holder

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.

How to remove the Front Cover

1 Open the front panel.

● Please remove and attach the

front panel by both hands.

● After opening the front panel by both hands.

1 Undo the right arm while pushing it inside. 2 Slide the front panel to right as shown in  gure. Then

remove while pulling it to front.

2 Remove the  lters.

Cap

3 Remove the caps and screws at the lower portion of the front cover.

4 Pull the front cover upward as far as the location where the lower portion of the front cover is on the de ector.

Lower portion of front cover

5 Remove while pulling the front cover in direction to arrow as shown in  gure to hold the both sides of front cover.

Screw

De ector

How to attach the Front Cover

1 After covering the front cover to the unit, certainly hook

at the upper portion (four places). Then, check that the drain pan is certainly attached. Push the front cover in the direction of arrow at the

portion of hooks.

2 Hook the front cover at lower portion to the drain pan and

then  x them by screws and attach the caps.

3 Attach the front panel.

● Certainly insert the left shaft of the front panel to the hole

of the front cover. Next insert the right shaft as same as the left.

4 Attach the  lters which are placed the surface written

“FRONT” up.

● After attaching the  lters, push the front panel at three

arrow portion as shown in  gure and close it.

Hole

Shaft

Guide