FOR SERVICE PERSONNEL ONLY

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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

RAS-X18CX

Outdoor Unit

RAC-X18CX

Tools Needed For Installation Work

● + – Screwdriver ● Measuring Tape ● Knife

● Saw ● ø 65mm Power Drill ● Hexagonal Wrench

Key ( 4mm) ● Wrench (14, 17, 24mm) ● Gas

Leakage Detector ● Pipe Cutter ● Putty ● Vinyl

Tape ● Pliers ● Flare Tool

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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.

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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.

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WARNING

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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 instructions 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 power cables approved by the authorities of your country.

Be sure to use the specified 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 fire.

Please use the specified components for installation work. Otherwise, the units may collapse or water leakage, electric shock and fire may occur.

Be sure to use the specified piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.

When installing or removing an air conditioner, only specified 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 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.

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CAUTION

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A circuit breaker or fuse (20A 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 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.

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

THE CHOICE OF MOUNTING SITE

(Please note the following matters and obtain permission from customer before installation).

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WARNING

● The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.

● The Outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.

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CAUTION

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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, television and inverter type fluorescent 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.

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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 specified in figure 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 flammable gas, steam, oil and smoke.

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.

Names of Indoor Components

No.

Item Qty

Hanger

1 1

The Length of Indoor Unit

Connecting Cord

0.9m

1.6m

Figure showing the Installation of Indoor and

Outdoor Unit.

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CAUTION

This unit is charge less up to 20m pipe length.

2

Screw for Hanger

( 4 . 1 x 3 2 )

3

Holder for Remote

Controller

4

AAA Size Battery

5

Screw for holder of

Remote Controller

( 3 . 1 x 1 6 )

6

Insulation pipe

6

1

2

2

1

Direction of Piping

Horizontally perpendicular to the unit

Connection

There are 6 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right, horizontally out from right, horizontally out to left, horizontally out to right, vertically down from left.

Don’t form the piping downward at the left of the unit.

Dimension of Mounting Stand of the Outdoor unit

(unit : mm) mounting stand

57

Be sure to completely seal any gap with putty.

above 50mm above 100mm

1

2,300mm or more

2 above 100mm

5

7

Remote Controller

8

Purifying Filter

1

2

500

12

35

120 above 100mm above 700mm above 200mm

( above 50mm when installed on the

) ceiling of balcony

Plug

3 above 100mm give clearance as wide as possible above 200mm

7

4

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

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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 vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).

The connection of insulated drain hose.

inner diameter ø 16mm

Please use insulated drain hose for the indoor piping

(commercial product).

1 Installation of Hanger, Wall Penetration and Installation of Protection Pipe

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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.

Direct Mounting On The Wall

● Please use hidden beams in the wall to hold the hanger.

200mm

ø 65mm

1030mm

External dimension of indoor unit

180mm

80mm

Drain Hose

180mm

Hanger

Level

Wall Penetration and Installation of Protection Pipe

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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.

Indoor

Seal with putty

Protection pipe

WALL

Outdoor

2 ~ 5mm

Seal with putty

Sleeve of protection pipe

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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.

2 Installation of the Indoor Unit

VERTICALLY DOWNWARD PIPING

Preparation

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Connect connecting cord.

Pull out the pipe, connecting cord and drain hose.

Connecting cords, pipe and drain hose must be tied together with Vinyl tape.

Installation

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The upper part of the Indoor unit is hanged on the hanger.

The projection at the lower part of the Indoor unit is hooked onto the hanger.

Hanger

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CAUTION

Hanger

Protection

Pipe

Drain Hose

Refrigerating

Pipe

Connecting

Cord

Lift the body of the unit upwards and then force it downwards.

Projection

Hook

Please pull the lower part of the Indoor unit outwards to check if the unit is hooked onto the hanger. Improper installation may cause vibration and noise.

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HOW TO REMOVE INDOOR UNIT FROM HANGER

Screw for Hanger

Please use more than 4 screws.

Line

Weight

Mark

Hole for pipe

Procedures of Installation and Precautions

● Procedures to fix the hanger.

1. Drill holes on wall.

2. Push plug into the holes.

(As shown below) (As shown below)

3. Fix the hanger on wall with 4.1 x 32 screw

(As shown in figure below)

Ceiling

Wall above 50mm

1 Hanger

Plug

2 Screw

32mm

Wall

4.1 x 32 Screw

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Pull down PULL section on the bottom of indoor unit and pull it towards you, then claws are released from hanger. (Indicated by 2 arrows in the drawing on the right.)

When bottom face of indoor unit cannot be pulled due to obstacles, etc. Remove front cover, insert screw driver into circle hole, pull claws down and pull indoor unit towards you.

Please check how to remove and attach front cover in this instruction manual.

Screw driver

Circle hole

Claw of indoor unit

1

2

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).

● Procedures to fix the holder of remote control.

1. Drill holes on wall.

2. Push plug into the holes.

(As shown below) (As shown below)

Wall

3 Remote

Control

Holder

5 Screw

20mm

Plug

Drain cap Drain hose

Drain cap

Drain hose

Please insert until here

Please insert until here

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 figure. Then smoothen the edges of openings with a file.

Pipe support

Openings

Pull up the pipe after bending downward

● Turn the piping while holding down the lower portion of pipe-support by hand.

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

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The refrigerating 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. Then the pipes are wrapped with insulation pipe.

Connect the connecting cord after removing electrical cover. (Refer to “CONNECTION OF POWER CORD”)

After adjustment, fit the connecting cord and pipes into the space available under the indoor unit. Use holder to hold them tight.

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Pipe

Connecting cord

CAUTION

Drain hose

Holder

● 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.

Insulation pipe (must be wrapped with vinyl tape at every 120mm).

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

Please select the easier position.

Pipe Rubber strap tied with great force

THE CONNECTION OF REFRIGERATING PIPE DURING THE

INSTALLATION OF INDOOR UNIT

Preparation To Install Refrigerating Pipes

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The refrigerating pipes and connecting cord transform and are attached.

The end of the refrigerating pipes are at locations marked with “ ” symbol.

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CAUTION

● Please fix in the plastic core after flaring to avoid plastic chips entering the pipes.

Refrigerating pipe

Connecting cord below

5mm

Please bend at a small radius to form an arc

0.65m

Installation

Hang the Indoor unit onto the hanger. Use the temporary stand at the back of the Indoor unit to push its lower part 15cm

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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”)

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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 hanger.

Heat insulation pipe

Temporary stand

Projection about 15cm

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

Protection pipe

Drain hose

Connecting cord

Holder

Connected section

3 Installation of Drain Hose

Ditch

Condensed water pond

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CAUTION

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

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Bending upwards

CAUTION

Condensed water pond

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.)

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● 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.

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

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

Pull downward

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CAUTION

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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.

Top cover

Back cover

Side cover

1 Preparation of Pipe

● Use a pipe cutter to cut the copper pipe.

Copper pipe

Trimming tool

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CAUTION

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Jagged edge will cause leakage.

Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe.

● Before flaring, please put on the flare nut.

Die

Die

A

Copper pipe

● Recommend to use

R410A flaring tool.

Outer

Diameter (mm)

Thickness

(mm)

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

0.8

0.8

0.8

1.0

Flare tool for R410A

Clutch type

0.0 ~ 0.5

0.0 ~ 0.5

0.0 ~ 0.5

0.0 ~ 0.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

1.0~1.5

1.0~1.5

1.0~1.5

1.0~1.5

1.5~2.0

1.5~2.0

1.5~2.5

1.5~2.5

2 Pipe Connection

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CAUTION

In case of removing flare nut of an Indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side will fly out. Prevent water from entering into the piping when working.

Wrench

Flare nut

Small dia. side

Large dia. side

Torque wrench

Valve head cap

Small dia. side

Large dia. side

Valve core cap

Outer dia.of pipe

6.35 (1/4")

9.52 (3/8")

12.7 (1/2")

6.35 (1/4")

9.52 (3/8")

12.7 (1/2")

Torque N·m

(kgf · cm)

13.7 – 18.6 (140 – 190)

34.3 – 44.1 (350 – 450)

44.1 – 53.9 (450 – 550)

19.6 – 24.5 (200 ~ 250)

19.6 – 24.5 (200 ~ 250)

29.4 – 34.3 (300 – 350)

12.3 – 15.7 (125 ~ 160)

3 Removal Of Air From The Pipe And Gas Leakage Inspection

Procedures of using Vacuum Pump for Air Removal

1

As shown in right figure, 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.

When the meter reaches - 101KPa

(-76cmHg) during pumping, fully tighten the shuttle.

Meter showing pressure

Closed

R410A

Lo Hi

Valve

Charge hose

Valve

Manifold valve

Vacuum pump

Vacuum pump adapter

2

Fully tighten the “Hi” shuttle of the manifold valve and completely unscrew the “Lo” shuttle. Run the vacuum pump for about 10–15 minutes, then completely tighten the “Lo” shuttle and switch off the vacuum pump.

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

3

Completely unscrew the spindle of the service valve (at 2 places) in anticlockwise direction to allow the flow of coolant (using Hexagonal Wrench key).

The body of service valve

4

Remove the charge hose and tighten the cap of valve head. Check the cap’s periphery if there is any gas leakage.

The task is then completed.

Cap of valve head

Cap of valve core

Hexagonal

Wrench Key

Cap of valve head

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. (Use the detector provided for R410A)

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WARNING

Procedures of Wiring

Power is supplied from Outdoor Unit

Indoor Unit

● THIS APPLIANCE MUST

BE EARTHED.

Outdoor Unit

C D

1.6 or

2.0

L N C D

Connecting Cord Power Cord

2.0

AC 220 - 240V

Outdoor Unit

10mm

Strip wires

25mm

25mm

10mm

GRN + YEL

10mm

35mm

Power line Control line

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WARNING

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

Be sure to use only power cables approved from the authorities in your country. For example in Germany: Cable type: NYM 3x1.5mm

2

, (fuse = 20A time delay)

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

Do not make any connection in the middle of the connecting cable. It may cause the wire overheating, emit smoke and fire.

Wiring Of The Indoor Unit

● For wire connection of the Indoor unit, you need to remove front cover 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

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Remove the screw and electrical cover.

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

Fixed the wire to terminal wires firmly as shown in figure at right side.

Electrical cover

Screw

Screw

AUTO

RESTART

SWITCH

AUTO

RESTART

SWITCH

Connect the earth cord

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

C D

Wiring of The Outdoor Unit

● Please remove the side cover for wire connection.

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WARNING

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If you cannot attach the side cover due to the connecting cord, press the connecting cord in direction to the front panel to fix it.

Be sure that the hooks of the side cover is fixed 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.)

L N C D

Earth terminal

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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 leadin 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.

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

IMPORTANT

Cable length up to 1 6m up to 15m up to 25m

Wire cross-section

1.5mm

2

2.5mm

2

4.0mm

2

IMPORTANT

Fuse Capacity

20A time delay fuse

Most Important Process

Purpose: To make the oil & refrigerant mix together.

They are in separated condition when air conditioner is stopped.

3 Take out air conditioner unit.

It is advisable to flush the piping with R410A to avoid any contamination remain before new installation.

Pump Down Method When Reuse Existing

Piping (R22 Model) for R410A Model

● Compressor oil of R22 model is insoluble in compressor oil of R410A model. The mixing of compressor oil may cause damage of compressor.

Possibility of Mixing

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Reuse of piping of R22 model is dangerous because of its compressor oil.

When reuse piping of R22 model, pump down must be carried out properly to ensure compressor oil which is remained inside piping is collected away.

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CAUTION

Reuse of piping R-22 model only apply if previous model is

Hitachi and proper pump down method is used.

To Reuse Old Piping

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Piping of R22 model can be reused only when air-conditioner is properly pumped down.

The purpose of pump down is to collect back the compressor oil (which is mixed with refrigerant and circulating inside refrigeration cycle) properly into the outdoor unit of air conditioner.

Proper Pump Down Method

1 Operate air conditioner at cooling mode for

10~15 minutes.

2 After 10~15 minutes of pre operation, close 2s valve.

After 3 minutes, close 4s valve.

Mixed refrigerant & oil will be collected into outdoor unit.

4 Install New Refrigerant air conditioner

1 Insulation And Maintenance Of Pipe Connection

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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 figure showing the installation of 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.

Insulation material for pipe connection

Sleeve of protection pipe

Putty

Putty

3 Power Source And Operation Test

Power Source

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CAUTION

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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.

2 Installation Of Remote Controller

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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.

How to Remove The Front Cover

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1 Remove the front panel.

Please remove and attach the front panel by both hands.

2

1

The controller must be hooked onto the hook at the lower part of the holder.

Push in the remote controller in the direction as shown in figure below.

Remote

Controller

Screw (2 pieces)

Holder for

Remote Controller

Operation Test

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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.

● 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 figure. Then remove while pulling it to front.

2 Remove the filters.

3 Remove the caps and screws at the lower portion of the

Cap front cover.

Screw

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

Lower portion of front cover

Deflector

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

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How to Attach the Front Cover

1

After covering the front cover to the unit, certainly hook at the upper portion (three places). Then, check that the drain pan is certainly attached. Push the center of front cover in the direction of arrow.

2

Fix the front cover at lower portion by screws and attach the caps.

3

Attach the front panel.

Hole

Shaft

Guide

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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.

Attach the filters which are placed the surface written

“FRONT” up.

After attaching the filters, push the front panel at three arrow portion as shown in figure and close it.