Hitachi RAC-08CH8, RAS-08CH8, RAS-08CH8(B), RAS-10CH8, RAS-10CH8(B) Installation Manual

...

SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

Indoor Unit Outdoor Unit

RAS-08CH8/RAS-08CH8(B) RAC-08CH8 RAS-10CH8/RAS-10CH8(B) RAC-10CH8 RAS-14CH8/RAS-14CH8(B) RAC-14CH8

●

+ – Screwdriver

●

Measuring Tape

●

Knife

●

Saw ● ø 65mm Power Drill ● Hexagonal Wrench

Key ( 4mm) ● Wrench (14, 17, 22mm)

●

Gas

Leakage Detector

●

Pipe Cutter

●

Putty

●

Vinyl

Tape ● Pliers ● Flare Tool

●

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

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

CAUTION

●

A circuit breaker or fuse 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.

●

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 R22. 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 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.

FOR SERVICE PERSONNEL ONLY

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).

WARNING

●

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

WARNING

●

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

CAUTION

●

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

●

The clearance distances from top, right and left are 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.

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 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.

●

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

INDOOR UNIT

Names of Indoor Components

Hanger

QtyNo. Item

The Length of Indoor Unit

Connecting Cord

Figure showing the Installation of Indoor and Outdoor Unit.

OUTDOOR UNIT

Screw for holder of Remote Controller

(3.1x16)

AAA Size Battery

Direction of Piping

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

Holder for Remote Controller

There are 4 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right, horizontally out from right and horizontally out to left. Don’t form the piping downward at the left of the unit.

(4.1x32)

Remote Controller

Purifying Filter

Screw for Hanger

Names of Outdoor Components

QtyNo. Item

Drain Pipe

0.8m

1.5m

Connection

Horizontally perpendicular to the unit

500

100

225

mounting stand

CAUTION

•

The installation height

of indoor unit must be

2.3m or more.

Bush

Holder

Bush

For RAC-08/10CH8 only

For RAC-14CH8 only

above 50mm

above 100mm

above

0.45m

above 300mm

must not bend

above 100mm

2,300mm or more

Maximum pipe length 10m

Minimum pipe length 5m

Plug

above 100mm

❈ above 300mm

above 200mm

❈ above 100mm

❈ give clearance

as wide as possible

above 50mm when installed on the ceiling of balcony

above 200mm

● 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.

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

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

inner diameter ø 16mm

Be sure to completely seal any gap with putty.

Maximum pipe length 15m

Minimum pipe length 5m

above 200mm

above 700mm

above 200mm

)

above 100mm

give clearance as wide as possible

above 50mm when installed on the ceiling of balcony

(

For RAC-08/10CH8 only

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

12 35

124

500

320

(10)

340

mounting stand

For RAC-14CH8 only

Installation of Hanger, Wall Penetration and Installation of Protection Pipe

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.

Wall Penetration and Installation of Protection Pipe

●

Drill a ø 65mm hole on wall which is slightly tilted towards the outdoor side. Drill the wall at a small angle.

●

Cut the protection pipe according to the wall thickness.

●

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

Procedures of Installation and Precautions

●

Procedures to fix the hanger.

1.Drill holes on wall. 2. Push plug into the holes. 3. Fix the hanger on wall (As shown below) (As shown below) with 4.1 x 32 screw

(As shown in figure below)

●

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)

Installation of the Indoor Unit

VERTICALLY DOWNWARD PIPING

Preparation

●

Connect connecting cord.

●

Pull out the pipe, connecting cord and drain hose.

Installation

●

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

●

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

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.

CAUTION

HORIZONTAL PIPING

Preparation

Change of Drain Hose and Installation Procedures.

●

Exchange the location of drain hose and drain cap during horizontal piping as shown in 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).

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

●

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.

CAUTION

●

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.

●

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

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT

Preparation To Install Refrigerating Pipes

CAUTION

●

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

CAUTION

You are free to choose the side (left or right) for the installation of drain hose. Please ensure the smooth flow of condensed water of the Indoor unit during installation. (Carelessness may result in water leakage.)

CAUTION

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

Be sure that the wire is not in contact with any metal in the wall. Please use the protection pipe as wire passing through the hollow part of the wall so as to prevent the possibility of damaged by mouse. Unless it seals completely, any air with high humidity flows from outdoor and any dew may drop.

WARNING

●

The refrigerating pipes and connecting cord transform and are attached.

●

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

Installation of Drain Hose

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 forwards.

●

Place the drain hose through the hole on the wall.

●

Wrap the refrigerating pipes with insulation pipe after connecting refrigerating pipe.

●

Connect the connecting cord after removing electrical cover. (Refer to “Connection of Power Cord”)

●

After adjustment, the connecting cord and refrigerating pipes are placed into the space available under the Indoor unit.

●

The projection of Indoor unit must hook to the hanger.

INDOOR UNIT

IA321: A

HOW TO REMOVE INDOOR UNIT

●

Push up the (PUSH) sections at the bottom of the indoor unit and pull the bottom plate towards you. Then the claws are released from the stationary plate. (The (PUSH) sections are indicated by 2 arrows in the right figure)

Sleeve of protection pipe

WALL

Protection pipe

Seal with putty

2 ~ 5mm

OutdoorIndoor

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

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

Hanger

Refrigerating Pipe

Protection Pipe

Drain Hose

Connecting Cord

Hanger

Projection

[Push] mark positions

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.

●

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

Drain hoseDrain cap

Drain cap

Please insert until here

Drain hose

Please insert until here

Pipe support

Pull up the pipe after bending downward

Openings

Pipe

Connecting cord

Drain hose

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

8 Holder

Pipe

Rubber strap tied with great force

below 5mm

Please bend at a small radius to form an arc

0.85m

about 15cm

Hook

Projection

Protection pipe

Connecting cord

Holder

Connected section

Drain hose

HITA

Heat insulation pipe

Connecting cord

Refrigerating pipe

Bending upwards

Condensed water pond

Ditch

Condensed water pond

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

125mm

45mm

200mm

60mm

80mm

780mm

125mm

280mm

45mm 115mm

450mm

Level

Hanger

Hole for pipe

Weight

Mark

Line

Please use more than 4 screws.

Screw for Hanger

OUTDOOR UNIT

Removal Of Air From The Pipe And Gas Leakage Inspection

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.

FINAL STAGE OF INSTALLATION

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 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.

Installation Of Remote Controller

Power Source And Operation Test

●

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.

Power Source

CAUTION

●

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.

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.

IA321: A

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.

Procedures of using Vacuum Pump for Air Removal

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.

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.

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

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.

Preparation of Pipe

●

Use a pipe cutter to cut the copper pipe.

●

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.

Pipe Connection

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

CAUTION

AIR REMOVAL

WARNING

●

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.)

●

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 3x1.5mm2.

●

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 an AC voltage drop between the L and N terminals if power is on. 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.

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.

●

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 16m

up to 15m

up to 25m

Wire cross-section

1.6mm

2.5mm

4.0mm

IMPORTANT

●

THIS APPLIANCE MUST BE EARTHED.

Procedures of Wiring

Wiring of The Outdoor Unit

●

Please remove the side cover for wire connection.

WARNING

CONNECTION OF POWER CORD

●

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.

WARNING

In case that power is supplied from Indoor Unit

How to Remove The Front Cover

BASE

DRAIN PIPE

●

Please use exclusive tool

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.

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

Meter showing pressure

Closed

Manifold valve

Vacuum pump

Valve

Charge hose

Valve

Vacuum pump adapter

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

Fuse Capacity

10A time delay fuse

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

1 Remove 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 figure. Then

remove while pulling it to front.

2 Remove the filters.

3 After removing two screws, pull the center of the front

cover towards you and release the claws.

4 Pull the side faces (lower sections) of the front cover

towards you as shown in the figure and remove the cover.

How to Attach the Front Cover

1 Check that the drain pan is securely attached.

2 After installing the front cover onto the unit, hook three

claws at upper side of the cover securely. Then, push the center of the front cover to lock the claws.

3 Tighten the two screws.

4 Install the filter.

5 Slide the shafts of the right and left arms on the washable

panel along the steps to insert the shafts into the holes till they stop. After checking that the shafts are securely inserted, close the panel.

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT

 There are holes on the base of Outdoor unit for condensed

water to exhaust.

 In order to flow 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 figure. Join the drain pipe to one hole.

 At first 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 firmly.

 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.

Copper pipe

Trimming tool

Die

Copper pipe

Wrench

Torque wrench

Flare nut

Lo Hi

The body of service valve

Cap of

valve core Hexagonal Wrench Key

Cap of valve head

L N

DCBADCBA

Indoor Unit

Line Cord

AC 220-240V

Outdoor Unit

Connecting Cord

1.6 or 2.0

2.0

Sleeve of protection pipe

Putty

Insulation material for pipe connection

Remote

Controller

Holder for Remote Controller

Screw (2 pieces)

●

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.

Procedure to remove the

cover of wiring terminals

●

Remove the screw (1 piece).

●

Hold the projected part at the lower left of the cover and push the cover upwards to remove it.

●

To close the cover, insert the upper part of the cover into the body of outdoor unit, then be sure that the hook below the cover is plugged in before screwing.

Hook

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

Please remove the cover for wire connection.

Outer Diameter (mm)

6.35

9.52

12.70

For R410A tool

0.0 ~ 0.5mm

0.0

0.5mm

0.0

0.5mm

For R22 tool

A (mm)

1.0mm

Method to remove the low cover

●

Pull the cover at 1 and 2 in the directions as shown by arrows to remove the cover.

Drain Pipe

Bush

100 mm ABOVE

Wiring Of The Indoor Unit

●

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

Method to remove front cover.

●

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

Connection wire is put under here

Side cover

ABC

Connection wire

Screw for earth line

Power line Control line

Indoor

Unit

Outdoor

Unit

GRN + YEL

Strip wires

25mm

10mm

30mm

10mm

30mm

10mm

70mm

10mm

35mm

Earth terminal

Fuse Capacity

15A time delay fuse

For RAC-14CH8 only

●

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.

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

BASE

DRAIN PIPE

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT

 There are holes on the base of Outdoor unit for condensed

water to exhaust.

 In order to flow 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 figure. Join the drain pipe to one hole.

 At first 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 firmly.

 When using in cold region, etc.

DRAIN PIPE

BUSH

100 mm ABOVE

BUSH

For RAC-14CH8 only

For RAC-08/10CH8

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")

Valve

head cap

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)

29.4 – 34.3 (300 – 350)

12.3 – 15.7 (125 ~ 160)

Small dia. side

Large dia. side

Valve core cap

Small dia. side

Large dia. side

ITAC

HITACHI

Step

Shaft

Hole

Hitachi RAC-08CH8, RAS-08CH8, RAS-08CH8(B), RAS-10CH8, RAS-10CH8(B) Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual