Hitachi RAS-18SX8, RAC-25SX8, RAC-35SX8, RAS-25SX8, RAC-18SX8 Installation Manual

...

< S842 : A >

Mounting board

Screw for mounting board

Remote controller holder

AAA size battery

Screw for remote controller holder

Remote controller

Anti-mold wasabi cassette

Bush

Drain pipe

Binding band

1 1

2 5

3 1

4 2

5 2

6 1

7 1

8 2

9 1

0 1

1.2 Wall Penetration and Installation of Protection Pipe

Drill a ø65mm hole on wall

which is slightly tilted towards the outdoor side.

Cut the protection pipe

according to the wall thickness and pass through the wall hole.

Empty gap in the sleeve of

protection pipe should be completely sealed with putty to avoid dripping of rain water into the room.

1. Installation of Mounting Board, Wall Penetration and Installation of Protection Pipe

•

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

( mark is tool exclusive use for R410A) • ª · Screwdriver

•

Measuring Tape • Knife • Saw • Pipe Cutter • Hexagonal Wrench

Key ( 4mm)

•

Power Drill (ø65~ø80mm)

•

Vacuum Pump • Pliers or Wrench • Torque Wrench Vacuum Pump Adaptor Flare Tool Gas Leakage

Detector Manifold Valve Charge Hose

FOR SERVICE PERSONNEL ONLY

— 7 —

INDOOR UNIT / OUTDOOR UNIT

RAS-18SX8 / RAC-18SX8 RAS-25SX8 / RAC-25SX8 RAS-35SX8 / RAC-35SX8

HITACHI SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

•

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. Make sure to connect earth line.

CAUTION .......Improper installation may result in serious consequence. This sign 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 customers to keep this installation manual together with the instruction manual.

WARNING

•

Please request your sales agent or qualiﬁ 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 installation stated in the installation manual during the process of installation. Improper installation may cause water leakage, electric

shock and ﬁ 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 cables which are approved ofﬁ

cial in your country. Be sure to use the speciﬁ ed circuit. A short circuit and ﬁ

re may occur due to the use of

low quality wire or improper work.

•

Be sure to use the speciﬁ ed 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 ﬁ re.

•

Please use the speciﬁ ed components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, ﬁ re or stronger vibration

may occur

•

Be sure to use the speciﬁ ed 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 speciﬁ ed 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 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 ﬁ

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

•

Unauthorized modiﬁ cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualiﬁ ed air conditioner technician or electrician.

Improper repairs may result in water leakage, electric shock and ﬁ re, 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 ﬁ nishing 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 or 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 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. Improper installing may wet your furniture.

•

An IEC approved power cord should be used. Power cord type: NYM.

INDOOR UNIT

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 speciﬁ ed as

in ﬁ gure below.

•

The location must be convenient for water drainage and pipe connection with the outdoor unit.

•

Do not install at a location where there is ﬂ ammable gas, steam, oil and smoke.

There is a risk of ﬁ

re, explosion, deterioration of

resin and/or damage.

•

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.

•

Lighting ﬁ xtures with electronic starters may shorten the reception distance and may even interfere with the signal being received.

OUTDOOR UNIT

WARNING

•

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

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 speciﬁ ed as

in ﬁ gure below. At least two sides must be clear for ventilation.

•

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

•

Place not exposed to strong wind Particularly on the rooftop of a building, strong wind blows and the outdoor unit may be damaged.

•

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 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 the indoor unit in a place where small animals may build their nests. If small animal goes inside the unit and touches the electrical parts, failure of the unit, smoke or ﬁ

re may be caused. Request your

customer to keep the surrounding of the unit clean.

INDOOR UNIT

Direction of Piping

Piping conﬁ guration may be in six different directions: direct rear piping, left or right downward piping and left or right sideways piping.

No. Supplied Items Qty

Items 8 & 9 are included in the

package of the outdoor unit.

SAFETY PRECAUTION

The indoor unit (air outlet) should be installed at least 1.5m away from ﬁ re alarm.

Figure showing the installation of Indoor and Outdoor Unit (For example: Ground installation)

Above 50mm

Be sure to com pletely seal any gap with putty.

The space indicated by an arrow

is to guarantee the performance of the air conditioner. Install the apparatus at the ample space in order to carry out the maintenance and repair works.

Above 50mm

Above 50mm (Above 100mm when there is piping connection at the back of the outdoor unit)

Above 80mm

Above 50mm

give clearance as wide as possible

When installing the indoor unit above the curtain rail or curtain box, allow dimensions not affecting the airﬂ ow.

Maximum pipe length 20m

Above 200mm

About 300mm

Must not bend

The indoor piping should be insulated with the enclosed insulation pipe.

Above 200mm

Above 50 mm when installed on the ceiling of balcony

Above 100mm

Heating efﬁ ciency will be enhanced if the space below the outdoor unit is closed so that no air passes through.

(Procure the material locally.)

The refrigerating machine oil is easily affected by moisture. Use caution to prevent water from entering the cycle.

Connection of insulated drain hose

Please use insulated drain hose for the indoor piping (commer cial product).

Inner diameter

16mm

• The difference in height between the indoor and outdoor unit should be kept below 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.

Length of Power Cable

Do not modify the power cable.

About 0.9m About 1.6m

Condensed Water Disposal of Outdoor Unit

•

There is holes on the base of outdoor unit for condensed water to exhaust.

•

In order to ﬂ 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, join the drain pipe as shown in the ﬁ gure. Cover the other drain holes (2 places) with a bush. To install the bush, put it on the drain hole as shown in the ﬁ gure and press the both sides of the bush to ﬁ t into the hole.

•

After installation, check whether the drain pipe and bush cling to the base ﬁ rmly.

•

Install the outdoor unit horizontally and make sure that condensate drains away.

•

When using in areas with cold weather

Especially when there are heavy snows in areas with cold weather, condensed water may freeze on the base and result in bad drainage. In such areas, please do not install the bush and the drain pipe. Also, make sure that the distance from the drain hole to the ground is 250mm or more.

Bush

Drain pipe

Outer diameter: above 16mm

Above 100mm

Drain hole

Bush

Push Push

CAUTION

• The drain hose can be installed from the left or right of the Indoor unit. When installing the indoor unit, the mounting board must be ﬁ xed horizontally or slightly tilted down towards the side of drain hose.

If it is tilted above the side of the drain hose, condensed water may overﬂ ow.

1.1 Direct Mounting On The Wall

•

Please use hidden beams in the wall to hold the

mounting board.

•

When it is difﬁ cult to look for a stud, use an item such

as board anchor (commercial product).

•

When using the mounting hole provided by the

apartment, cut it in such manner that the dimension of the mounting anchor projecting from the wall is 15mm or below.

Mounting board

Hole for pipe

Board anchor

Line

Weight

Screw at the positions near the upper and lower hooks where the indoor unit is hung. Use more than 4 screws for ﬁ xing.

Mark

Level

Screw for

mounting board

Drill Hole for Board Anchor

•

While placing the mounting board on the wall, embed the board anchor in the wall.

•

Slide down the mounting plate and then ﬁ x the mounting board with the board anchor.

798mm 480mm 158mm 450mm

450mm

174mm 100 mm

20mm

81.5mm

ø65mm

42.5mm

External dimension of indoor unit

268mm

600mm

95mm

348mm 635mm

81.5mm 295mm

200mm

50mm

42mm

ø65mm

ø80mm

ø65mm

42.5mm

Drain hose

2~5mm

WALL

Putty

Sleeve of protection pipe

Protection pipe

Putty

Indoor

Outdoor

2. Installation of the Indoor Unit

2.1 Preparation of Installation

Remove the front panel

•

To remove front panel, please refer to “Removing and Attaching the Front Panel” on page 13.

•

Make sure to use both hands to attach and remove the front panel.

Remove the lower cover

•

Push the bottom inner part (1) of the lower cover to remove the lower cover.

•

To attach the lower cover, attach 2 ﬁ rst and then attach

by rotating it around 2 as the fulcrum.

Remove

Attach

Wiring connection

•

Please refer to “Connection of Power Cord” on page 10.

Cutting lower cover bush (Horizontal and downward piping)

•

While installing the pipe from the right, left or bottom side,

use a knife to cut lower cover bush accordingly.

•

Use the groove on the outer side if the pipe which is to be

installed from the left side, etc. is big.

Bush part

Groove on the outer side

Groove on the inner side

Changing of drain hose

(Horizontally piping)

•

Install and change the drain hose and drain cap when installing the pipe horizontally as shown below.

•

Remove the lower cover when installing and changing.

• Do not carry out horizontal piping for drain hose.

Drain cap Drain hose

Remove the screw and

pull out the drain hose.

Drain hose screw

Insert drain cap up to the

location securely till the cap stops.

Drain cap

Drain hose

Drain hose screw

Use the plier to pull and turn the drain cap for easy removal.

Push the drain hose deeply into the screw hole, ﬁ x with the removed screw during step 1.

CAUTION

•

Be sure to insert drain hose and drain cap ﬁ rmly and ﬁ x with screw

Insufﬁ cient insert may result in water leakage.

Preparation of Pipe

Backward piping

Remove the auxiliary insulation material sheet which is attached to the pipe insulation.

Referring to the mark on the rear side, form the pipe within the wall hole range.

Wall hole range

Horizontally and downward piping from the right

Remove the auxiliary insulation material sheet which is attached to the pipe insulation. (Keep the removed auxiliary insulation material sheet because it will be reused after pipe connection.)

Carry out refrigerating pipe forming.

Layout of horizontally piping from the right

Temporary join the refrigerating pipe, drain hose and connecting cord with tape.

Place the starting point of refrigerating pipe bending within the wall hole range.

Please bend at a small radius to form an arc.

Pipe

Bottom cover bush hole

Drain hose

CAUTION

•

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

If the starting point of refrigerating pipe bending is projected from the wall hole range or if the bending radius is too large, the indoor unit may be lifted from wall and this may cause poor ﬁ nishing.

Pipe support

Transform after bending downward

36mm

41mm

〜

Installation after connection of refrigerating pipes (Horizontal piping)

Remove the auxiliary insulation material sheet which is attached to the pipe insulation. Connect the refrigerating pipe. (Refer to “Pipe Connection” on page 9)

Cut the heat insulation sheet refrigerating pipe aligning to the insulation sheet of the pipe and ﬁ x them temporarily with tape.

Cover the pipe connection with the auxiliary insulation sheet which was removed earlier, with its split line on the top. Wrap the tape without any gap. Tape must not be over tightened. (

Refer to “Heat insulation and Finishing of Piping” on page 11)

If there is gap or over-tightened, it may cause condensation.

Refrigerating pipe

Pipe

Auxiliary insulation sheet

Refrigerating pipe insulation sheet

Cut

Refrigerating pipe

About 90mm Temporarily wrap with tape

Split line of the auxiliary insulation sheet must be positioned within this range.

Pipe support

Auxiliary insulation sheet

Place the ending point of refrigerating pipe bending within this range.

Pipe support

Refrigerating pipe

Center line of wall hole

Place the refrigerating pipe bending within the wall hole range

ø65 wall hole range

Drain hose

24mm

36~41mm

56.5mm

Temporary join the refrigerating pipe, drain hose and connecting cord together with tape.

Wrap the wall hole portion with tape.

Wrap with tape

Pipe

Connecting cord

Drain hose

Pipe support

Refrigerating pipe

Center line of wall hole

Place the refrigerating pipe bending within the wall hole range

ø65 wall hole range

Drain hose

24mm

36~41mm

56.5mm

Form the refrigerating pipe according to the wall hole position. Especially in the case of horizontally backward piping, follow the instruction below to carry out accurate forming.

Forming of refrigerating pipe for horizontally backward piping

(1) Refer to the mark at the back, start bending the

refrigerating piping within wall hole range.

Connecting the refrigerating pipe at the back of the indoor unit

•

Form and set the refrigerating pipe and connecting cord.

2.2 Installation

Connecting the refrigerating pipe other than at the back of the indoor unit

Insert the pipes through the wall hole.

Hang the upper part of the Indoor unit on the mounting board.

Push the lower part of the indoor unit to the wall, hook the projection on the lower part of the Indoor unit onto the mounting board.

Cover the pipe connection with the auxiliary insulation sheet which was removed earlier, with its split line on the top. Wrap the tape without any gap. (Refer to “Heat insulation and Finishing of Piping” on page 11) If there is gap or over-tightened, it may cause condensation

CAUTION

•

When using a polyester core, make sure to insert it only after ﬂ aring is carried out to avoid cutting dust from getting inside.

Auxiliary insulation sheet

Place the starting point of refrigerating pipe bending within the wall hole range.

Please bend at a small radius to form an arc.

(2) When forming, bend the refrigerating pipe with the

smallest radius.

Refrigerating pipe

Center line of wall hole

ø65 wall hole range

Drain hose

Refrigerating pipe

Form the connecting cord and refrigerating pipe and put them in the space on the lower side of the rear surface of the indoor unit. Put the binding band 0 on the hook located on the rear surface to ﬁ x it.

Join refrigerating pipe, connecting cord and drain hose temporarily with tape and wrap the wall hole portion with tape.

Be sure to cut the extra binding band.

(Otherwise, it may result in abnormal noise or dewfall.)

Hook

0 Binding band

Wrap with tape

Binding band can be installed to whichever side of the installation points. However, it is recommended to attach it on the right side viewing from the rear.

Match the end of the refrigerating pipes with the locations marked with “4” symbol.

Insert polyester core (commercial product) into the large diameter pipe.

Below 5mm

1.00m

Please bend at a small radius to form an arc. (Pipe can be bent with a small radius without being crushed if polyester core is used.)

Projection of the indoor unit

1 Mounting board

Protection pipe

Refrigerating pipe

Connecting cord

Drain hose

OUTDOOR UNIT

Small

diameter

Connecting the refrigerating pipe at the back of the indoor unit

Remove the auxiliary insulation material sheet which is attached to the pipe insulation. (Keep the removed auxiliary insulation material sheet because it will be reused after pipe connection.)

Hang the indoor unit on the mounting board.

Place the cushion under the right rear surface of the indoor unit to lift the lower side of the unit by approximately 15cm.

Connect the refrigerating pipe. (Refer to “Pipe Connection” on page 9)

Cover the pipe connection with the auxiliary insulation sheet which was removed earlier, with its split line on the top. Wrap the tape without any gap. (Refer to “Installation after connection of refrigerating pipes (Horizontal piping)” on page 5, step 3)

Insert the drain hose into the wall hole.

Connect the connecting cord. (Refer to “Connection of Power Cord” on page 10).

Form connecting cord and refrigerating pipe and put them in the space on the lower side of the rear surface of the indoor unit.

Remove the temporary stand and hook the projection on the lower part of the Indoor unit onto the mounting board.

CAUTION

•

Do not over tighten vinyl tape on pipe heat insulation sheet

Do not over tighten to avoid loss of heat insulating effect and dew condensation.

•

Pull the lower part of the indoor unit towards you and conﬁ rm that the tab of the indoor unit is ﬁ t in the installation plate

If the tab is not ﬁ tted in securely, vibration of the indoor unit becomes stronger.

Auxiliary insulation sheet

Refrigerating pipe

Connecting cord

Connection part

Protection pipe

Drain hose

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

CAUTION

•

During drainage work, install the drain pipe to ensure smooth drainage. Make sure to carry out drainage check.

Careless work may result in water leakage.

•

Make sure that there is no problem as shown in the ﬁ gures on page 8.

Such problems may cause clogged drain and could result in water leakage.

•

Drain hose must be at a slope of at least 1/25.

•

When inserting the drain hose into the drain pipe for embedded piping, etc., do not cut the drain hose in the middle.

This may lead to poorer heat insulating performance of the drain hose and could result in water leakage.

•

Do not lead the drain hose to a place where corrosive gas (sulfur, ammonia, etc.) is generated such as septic tank.

Corrosive gas may ﬂ ow into the indoor unit through the drain hose, and could result in corrosion on the copper pipe and odor in the room.

3. Drainage Check

After the indoor unit is installed, please ensure the smooth ﬂ ow of condensed water of the indoor unit during installation. (Careless work may result in water leakage.)

How to remove the indoor unit

•

Push the [PUSH] section at the bottom of the indoor unit from the outside, the claws are released from the mounting board. (2 places on the left and right)

•

If the bottom of the indoor unit cannot be pushed, remove the bottom part of the front cover and insert a screwdriver into the hole for removal of indoor unit as shown in the ﬁ gure. Then, push the claws upwards while holding down the upper part of the hole 1 and pull the indoor unit towards you 2. When horizontal piping is used, be careful not to damage the pipe and connecting cord with the tip of the screwdriver during this operation.

•

Please refer to “Removing and Attaching the Front Cover” on page 14 to remove the bottom part of the front cover.

Screwdriver

Hole for removal

Hold with hand

Hole for removal

Claw

Mounting board

Bending upwards

Condensed water pond

Ditch

Condensed water pond

•

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.

•

When removing side cover, please pull the handle after undoing the hook by pulling it downward. Reinstall the side cover in reverse order of the removal.

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

In snowy region, install a snow guard and elevated stand to ensure the airﬂ ow for better heating efﬁ ciency.

In other regions, it is recommended to install a tent for shade.

Elevated stand

Tent

Fixed leg dimension of outdoor unit

500

125

330

310

(10)

Fixed leg

Unit: mm

CAUTION

•

Do not touch the suction port, bottom surface or aluminium ﬁ n of the outdoor unit

Failure to do so may cause an injury.

Installation information

•

Be sure to perform the cleaning unit operation check.

•

Unlike conventional types, this model has no grille on its top surface.

Large diameter

About 0.45m

WARNING

•

Protection pipe (commercial product) must be used

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 to prevent damaged by mouse, possibility of short circuit or ﬁ re.

•

Completely seal with putty

High humidity air inside the wall or the outdoor may go in to the room and could result in dripping of dew. It could also cause smell or odor present outdoor and inside the wall spreading into the room.

Projection of the indoor unit

Fixing tab

Cushion

About 15cm

Horizontally backward

Bush part

CAUTION

Be sure that the drain hose is loosely connected bend or proper condition like left ﬁ gure.

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. (Careless may result in water leakage.)

— 3 —

— 1 — — 2 — — 5 — — 6 —

— 4 — — 8 —

Drain hose

For outdoor unit installation, allow at least 2 sides of space around the unit to ensure ventilation ﬂ ue.

< S842 : A >

Address

Wrench

Torque wrench

Flare nut

Half union

Female side

Male side

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

REMOVING AND ATTACHING THE FRONT COVER

1. Pipe Cutting and Flaring

•

Use a pipe cutter to cut the pipe and remove burr.

CAUTION

•

Remove burr

If burr is not removed, it may cause leakage.

• Point the side to be trimmed downwards during

trimming to prevent copper chips from entering the pipe.

2. Pipe Connection

•

Remove the ﬂ are nut from the pipe of the indoor

unit by removing the ﬂ are nut (female side) with a spanner while holding down the half union (male side) with a spanner.

•

Do not crush the pipe while bending it.

•

Apply refrigerant oil on the connection part. After

carrying out the center alignment and manual tightening of the flare nut, tighten the flare nut securely with a torque wrench (spanner).

Copper pipe

Trimming tool

•

Before ﬂ aring, please put on the ﬂ are nut.

Copper pipe

Die

Please use exclusive tool for refrigerant R410.

Outer Diameter

A (mm) Rigid Flaring Tool

(ø)

For R410A tool For R22 tool

6.35 (1/4 ”) 0~0.5 1.0

9.52 (3/8 ”) 0~0.5 1.0

3. Remove of Air from the Pipe and Gas Leakage Inspection

CAUTION

•

When removing ﬂ are nut of the indoor unit, ﬁ rst remove the nut of small diameter side.

Otherwise the nut of big diameter side will ﬂ y out.

• Prevent water from entering into the piping when connecting.

• Be sure to tighten the ﬂ are nut to the speciﬁ ed torque with a torque wrench. If the ﬂ are nut is overtightened, it may split after sometime and may cause refrigerant leak.

• When using a control valve, make sure that the packing is not deteriorated and avoid excessive tightening

of the handle. Otherwise, gas may leak from the service valve.

* Tightening torque must be as shown in the table below.

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)

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)

Valve core cap 12.3~15.7 (125~160)

Valve head cap

From the viewpoint of global environment protection, air purge type should be vacuum pump method.

• Remove the valve head cap of the service valve.

• Remove the cap of valve core and connect the charge hose.

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

Valve head cap for the service valve at small diameter side

Valve head cap for the service valve at large diameter side

Cap of valve core

• Loosen the spindle of the service valve with small diameter by 1/4 turn and tighten the spindle immediately after 5 to 6 seconds.

• Remove the charging hose from the service valve.

• Unscrew the spindle of both the service valves in anticlockwise direction to allow the flow of refrigerant (unscrew halfway).

• Tighten the cap of valve head. Check and make sure that there is no gas leakage.

• Fully tighten the “Hi” shuttle of the manifold valve and completely unscrew the “Lo” shuttle. Run the vacuum pump. (Adapter is switched on)

• After pumping for about 10-15 minutes, completely tighten the “Lo” shuttle and switch off the vacuum pump. (Adapter is switched off)

Make sure the meter reaches -0.1MPa (-76cmHg) during pumping.

Closed

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

Meter showing pressure

R410A Manifold valve

Vacuum pump

Ball valve

Vacuum pump adapter

Charge hose

Ball valve

Valve

Please leave the ball valve fully open at all times.

Body of service valve

Hexagonal wrench key

Cap of valve head

Cap of valve core

Works to be done when transferring or removing air conditioner

From the viewpoint of global environment protection, refrigerant should be recovered (pumped down) when the air conditioner is transferred or removed.

Perform force-cooling operation (refer to “Force-cooling operation” on page 12) for about 5 minutes as a preliminary operation.

Tighten the spindle of the service valve at small diameter side in clockwise direction.

Continue the force-cooling operation for another 1-2 minutes, and then tighten the spindle of the service valve at large diameter side in clockwise direction.

Stop the force-cooling operation.

CONNECTION OF POWER CORD

Procedures of Wiring

CBACBA

AC 220-230

1ø 50Hz

Indoor unit Outdoor unit

Connecting

cord

ø2.0

WARNING

•

The naked part of the wire core should be 10mm ﬁ 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 wire speciﬁ ed for the use of air-conditioner.

•

Please refer to the manual for wire connection, the wiring technique should meet the standard of the electrical

installation.

•

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 ﬁ re.

Wiring of the Indoor Unit

Remove the front panel. (Refer to “Removing and Attaching the Front Panel” on page 13)

Remove the terminal cover and screw, hold the upper part when removing.

Bring the connecting cord from the rear surface to the front surface through the cable guide.

Connect the connecting cord and ﬁ x with cord band.

Hook onto the claw at the lower part of the terminal cover and ﬁ x with screw.

Remove the lower cover.

Terminal cover

Screw

Connecting cord

Cord band

Connecting cord

Drain hose

Refrigerating pipe

Cable guide

Wiring of the Outdoor Unit

Please remove the side cover and terminal cover for wiring connection.

FINAL STAGE

WARNING

•

The connecting cord must be ﬁ x with cord band

Otherwise rain water may enter and causes short circuit.

Besides, an external force may apply to the connection part of the connecting cord and could result in heat and ﬁ re.

• The terminal cover must be installed after work is done.

Earth terminal

Terminal cover

Terminal marking

A B C

Cord band

1. Heat Insulation and Finishing of Piping

CAUTION

•

Completely seal any gap with putty

High humidity air inside the wall or the outdoor may

go in to the room and could result in dripping of dew. It could also cause smell or odor present outdoor and inside the wall spreading into the room.

• Cover the pipe connection with the auxiliary insulation sheet, wrap the tape without any gap.

• If there is gap or over-tightened, it may cause condensation.

• Please wrap the pipe and power cord together with vinyl tape as shown in the ﬁ gure of the installation of indoor and outdoor units on page 2.

• To enhance the heat insulation and to prevent water condensation, please cover the outdoor part of the drain hose and pipe with insulation sheet.

• When using an exit cover, do not attach a bush for pipe.

• When an exit cover is not used, seal the gap of the hole on the wall, bush and pipe completely with putty. If an exit cover is used, seal the gap of the hole on the wall and pipe completely with putty. In the case of embedded piping, seal the gap of the pipe completely with putty. Incomplete sealing could cause entering of high humidity air into the wall or indoor unit, which could result in dripping of dew. It could also cause smell or odor present outdoor and inside the wall spreading into the room.

Auxiliary insulation sheet

Insulate and wrap with tape

Connecting cord

Refrigerating pipe

Drain hose

Seal with putty

About 90mm

Putty

Bush for pipe

Do not cut the drain hose in the middle

When using an exit cover, do not attach a bush for pipe.

3. Remove the Protection Sheet

• Remove the protection sheet on the display panel.

Display panel

4. Power Source and Operation Test

Power source

WARNING

•

Never modify or extend the power cord.

•

Keep additional length for the power cord and do not

render the plug under external force as this may cause poor contact.

•

Do not ﬁ x the power cord with U-shape nail.

•

The power cable easily generates heat. Do not bring

the cable together with a wire or vinyl tie.

CAUTION

•

Use a new power outlet.

Old power outlet may cause insufﬁ cient electrical contact,

which could result in unforeseen accident.

•

Connect and disconnect the power plug a few times

to ensure smooth plug-in before completely insert the power plug into the power outlet.

Operation test

• Please ensure that the air conditioner is in normal operating condition during the operation test.

• Explain to your customer about the proper operation procedures as described in the operation manual.

• If the indoor unit won’t operate, check the cable for correct connection.

Force-cooling operation

• When the temporary switch of the indoor unit is pressed for more than 5 seconds, the force-cooling operation starts.

Use this mode when performing the failure diagnosis or

collecting refrigerant into the outdoor unit.

• The Timer lamp ﬂ ashes when force-cooling is in operation.

• Press the temporary switch again or use the remote controller to stop the force-cooling operation once this operation is completed.

Temporary switch (Force-cooling operation starts when the switch is pressed for more than 5 seconds. Press the switch again and use the remote controller to stop the operation.)

CAUTION

•

Do not operate the unit for more than 5 minutes while

the spindle of the service valve is closed.

CAUTION

•

Please do not use excessive force to open and close the movable panel

by hands.

This may cause malfunction.

(The movable panel automatically open and close when the power is ON/OFF

and START/STOP.)

Removing and Attaching the Front Panel

•

Be sure to hold the front panel with both hands to detach and attach it.

Please refer to the operation manual on how to open and close the front panel.

Movable panel

Removing

Arm

Push

1 Push the end of the right-side arm outward to release

the tab.

2 Move the left-side arm outward to release the left tab,

and then pull the panel towards you.

Arm

Step

1 Insert the shaft of the left arm along the step on the unit into the

hole.

2 Securely insert the shaft of the right arm along the step on the

unit into the hole.

3 Make sure that the front panel is securely attached, and then close

the front panel.

Attaching

Removing the Front Cover

Remove the front panel.

Remove the screw cover at the bottom of the front cover

and remove the screw.

Remove the screws on the terminal cover, on the left side

of the front cover and the screw on the right side.

Attaching the Front Cover

Make sure that the dew receiving pan and the cleaning unit

are securely attached.

After attaching the left and right sides of the front cover onto

the unit, ensure that the top tabs (2 places) have been ﬁ x on.

Remove the bottom part of the front cover by pulling it

forward.

Hold onto the left side of the front cover and remove while

pulling in the direction of the arrow.

Screw

Screw Bottom part of

the front cover

Screw

Right side of the front cover

Left side of the front cover

Terminal cover

Insert the screwdriver into the hole on the upper right of the

front cover to release the tab.

Hold onto the right side of the front cover and remove while

pulling in the direction of the arrow.

Fix on the top tabs (2 places)

Tighten the screws on the terminal cover and on the left and

right sides of the front cover.

Tighten the screws at the bottom of the front cover and

replace the screw cover.

Screw Screw

Attach the front panel.

OPERATION CHECK

CAUTION

•

Once the installation work has been completed, close the front panel and insert the power plug into the power

outlet, and then carry out “Filter Cleaning Operation Check”.

• Slide the locks (2 places each on the left and right) of the micro mesh stainless filters upwards.

Installing the Micro Mesh Stainless Filters

Lock

• Place the micro mesh stainless filter with its side having indication of UPPER FILTER and BACK facing towards the unit. (The shape of the left and right filters are the same.)

• Insert the bottom side of micro mesh stainless filter (left and right), then slightly bend and insert it in the arrow direction.

Insert all

Bend and insert

• Slide micro mesh stainless filter lock (2 places on the left and

right) downwards.

• Align the ﬁ lter with the top face of the indoor unit, and then slide and push it in. (The shape of the left and right filters are the same.)

•

Push up the filter lock (both side) on the top surface

Filter lock

2. Afﬁ xing the Remote Controller and Installing the Anti-mold Wasabi Cassette

• The remote controller may be afﬁ xed to a wall or pillar with the remote controller mounting screw.

• When operating the air conditioning with the remote controller attached, please make sure that the signal is received by the air conditioning. Furthermore, ﬂ uorescent lighting may affect the reception of the signal, therefore, please make sure by turning on the ﬂ uorescent lighting even during the day.

• Lighting ﬁ xtures with electronic starters may shorten the reception distance and may even interfere with the signal being received.

• Install the 7 anti-mold wasabi cassette. (Refer to page 8 of the Operation Manual)

Wall or pillar

Prohibited

3 Remote controller holder

5 Screw for remote

controller holder

• Insert from above.

• Hold the upper part of the remote controller to pull it out.

• Do not remove the remote controller by twisting it left and right. Doing so could result in coming off of the rear cover.

Noise may occur if the anti-mold wasabi cassette is not installed properly.

This is utilized to avoid the interference of remote controller signals when two indoor units are installed in the same room. The Address Selector Switch is on the outside of the remote controller battery cover. (Factory setting is set to “A”)

• Setting the address (to avoid interference) Only one of the two indoor units has to be set (turn off the power to the other indoor unit).

Place a battery in the remote controller and press the reset switch. (Refer to page 11 of

the Operation Manual)

While pointing the remote controller transmitter/receiver at the indoor unit, move the

switch of the Address Selector Switch to “B”.

The channel is set when the unit beeps, conﬁ rming it has received the signal.

• After changing the address, please conﬁ rm the unit’s operation with the remote controller. If the unit does not operate, return the switch to “A” and set the switch again.

7 Anti-mold wasabi cassette

Address selector switch

Switch

Installation

About Address Selector Switch

Gas Leakage Inspection

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. (Be sure to use R410A detector.)

Detail of Cutting the Connecting Cord

IMPORTANT

Fuse Capacity

16A time delay fuse

Filter Cleaning Operation Check

(1) Before turning on the power of the air conditioner, make sure that the ﬁ lters (2 pieces at the top and 2 pieces in

front) have been installed properly and locked. (2) When the power of the air conditioner turns on, the “Filter Cleaning Operation” starts automatically. The clean indicator is lit during the ﬁ lter cleaning operation.

• Filter cleaning operation check will take approximately 7 minutes for the cleaning unit to make one cycle of back and forth

movement. Make sure that the cleaning unit is actually working by a visual inspection from the top of the indoor unit.

• Close the front panel properly. (The ﬁ lter cleaning operation does not start if the front panel is not closed properly.)

• If the front panel is opened during the operation check, the operation will stop immediately.

• If the

“ON/OFF” button on the remote control is pressed during the operation check, the operation check is stopped before its completion. Wait until the operation check is completed without pressing any button on the remote controller.

• If the ﬁ lters are not installed properly, “Filter Cleaning Operation” is found abnormal and the clean indicator blinks.

The ﬁ lters may come off during operation if they are not installed properly.

• If the clean indicator blinks during the “Filter Cleaning Operation” means that the operation is stopped before its completion due to an abnormal condition.

In this case, refer to “Check the Operation of the Filter Cleaning Unit” and “Troubleshooting” of the operation manual and

take appropriate actions.

After the installation work has been completed, be sure to carry out “Filter Cleaning Operation Check” before performing trial run (cooling or heating)!

Unlike the coventional type of air conditioner, this air conditioner has no grille at its top surface, It is because this air conditioner is equipped with the cleaning unit, and to prevent the top surface from getting dirty easily.

Do not touch the cleaning unit during the ﬁ lter cleaning operation. Doing so could result in injury or failure of the appliance.

Filter Lock

• Make sure that the top ﬁ lters have

been locked. Lock the ﬁ lters if they are not locked. (The ﬁ lters may come off during the operation if they are not locked.)

Front Panel

• Close the front panel properly. (The ﬁ lter cleaning operation does

not start if the front panel is not closed properly.)

• If the front panel is opened during the operation check, the operation will stop immediately.

Clean Indicator

This indicator is lit during the ﬁ lter cleaning operation. It blinks if any abnormal condition occurs during the filter cleaning operation.

Cleaning Unit

How to check Micro Mesh Stainless Filter installation

• Remove the front panel and check if the ﬁ lter locks (4 pcs) are tripped or slant.

• If the ﬁ lters are not inserted properly, refer to following “Installing the Micro Mesh Stainless Filters”.

• Please perform “Filter cleaning operation check” again after reinstalled the ﬁ lters.

— 9 — — 10 —

—

11 — — 12 —

—

13 —

— 14 —

—

15 — — 16 —

•

Indoor unit

•

Outdoor unit

70mm

10mm

100mm

Connecting cord

Green + Yellow (ground)

160mm

C, (ground)

70mm

10mm

45mm

Strip wires

Green + Yellow

10mm

20mm

160mm

C, (ground)

A, B

10mm

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 CN7.

• 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.

• You can refer to this installation manual on how to remove and re-attach the front cover.

Engraved mark UPPER FILTER and BACK at the back.

CN7

Hitachi RAS-18SX8, RAC-25SX8, RAC-35SX8, RAS-25SX8, RAC-18SX8 Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual