HITACHI RAK-DJ18PHAE Indoor Unit Instruction Manual

HITACHI RAK-DJ18PHAE Indoor Unit

SAFETY PRECAUTION

Read the safety precautions carefully before operating the unit.
This appliance is filled with R32.
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.
Make sure to connect earth line.
This sign in the figures 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 a customer to keep this installation manual together with the instruction manual.

WARNING

• 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 installation 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 cables which are approved official in your country. Be sure to use the specified circuit. A short circuit and fire may occur due to the use of low quality wire or improper work.

• Be sure to use the specified 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 fire.

• Please use the specified components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fire or
  stronger vibration may occur.

• Be sure to use the specified piping set for R410A,R32. 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 specified refrigerant (R32)
  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 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.

•  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 finishing 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.

• The electric cables should neither be reworked nor added. Make sure to use an exclusive circuit breaker.

• Otherwise fire or electric shock might occur by connection failure, isolation failure or over current.

• Make sure to connect cables to terminal properly and terminal cover should close firmly.

• Otherwise, over heating at terminal contact, fire or electric shock might occur.

• Make sure that there is no dust on any connected points of electric cables and fix firmly.

• Otherwise, fire or electric shock might occur.

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 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. Improper installing may wet your furniture.
• An IEC approved power cord should be used. Power cord type: NYM.

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

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

CAUTION

• Selecting the installation location: Suitable location that will reduce the impact from rain and direct sun that may affect the unit performance.
• 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 three of the above sides must be open air .
• Be sure that the hot air blown out of the unit and noise do not disturb the neighbourhood.
• Do not install at a location where there is flammable gas, steam, oil and smoke.  The location must be convenient for water drainage.
• Place the Outdoor unit and its connecting cord at least 1 m away from the antenna or signal line of television, radio or telephone. This is to avoid noise interference.

Figure showing the Installation of Iutdoor Unit.

Direction of Piping
There are 6 directions allowed, namely, backward piping, backward piping from left, horizontally piping from right, horizontally piping from left, vertically down from right, vertically down from left.

Names of Indoor Components

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.

Procedures of Installation and Precautions

1. Drill holes on wall.
2. Push plug into the holes.
3. Fix the hanger on wall

Wall Penetration and Installation of Protection Pipe

• Drill a ø65mm 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.
• Please ensure smooth flow of water when installing the drain hose. Improper installing may wet your funiture.
• An IEC approved power cord should be used. Power cord type: NYM.

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

Installation Of The Indoor Unit

Cutting Low Cover bush
While installing the pipe from the right, left or bottom side, use a knife to cut openings as shown in figure. Then smoothen the edges of openings with a file.

PIPING FROM THE RIGHT SIDE (BACKWARD, DOWNWARD, HORIZONTAL)

Preparation

• Connect connecting cord.
• Pull out the pipe, connecting cord and drain hose.

Installation

• Insert the pipe through the wall hole.
• 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.

PIPING FROM THE LEFT SIDE (BACKWARD, DOWNWARD, HORIZONTAL)

Preparation
Changed of Drain Hose and Installation Procedures.

• Exchange the location of drain hose and drain cap while installing the pipe from the left side as shown in below. Be sure to plug in the drain hose until the insulating material folds upon itself.
• Please use pliers to pull out the drain cap. (This is an easier way to remove the drain cap).

CAUTION
Insufficient insert may result in water leakage.

CAUTION

• The rubber strap used for fixing the insulator should not b e tied with great force. Otherwise, this will damage heat insulation and causes water condensation.
• 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.
• Transform the piping while holding down the lower portion of pipe-support by hand.

INSTALLATION AFTER CONNECTION OF REFRIGERATING PIPES

• The refrigerating pipe 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 low cover. (Refer to “CONNECTION OF POWER CORD”)
• After adjustment, fit the connecting cord and pipes into the space available under the unit. Use holder to hold them tight.
• Be sure to cut the extra binding band. (Otherwise, it may result in abnormal noise or dewfall.)

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
The refrigerating pipes and connecting cord transform and are attached.

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 low cover.
• 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 and Finish of the Piping

• The connected terminals should be completed sealed with heat insulator and then tied up with rubber strap.
• Do not tie the terminals with the tape too tight.
• If any clearance or over-tightening may cause condensation.
• Please tie the pipe and power line together with vinyl tape as shown in the figure showing the installation of Indoor and Outdoor units.
• To enhance 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 Drain Hose

CAUTION
Be sure that the drain hose is not loosely connected bend or proper condition like left figure.

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. (Careless may result in water leakage.)

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)

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

Preparation of Pipe

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

CAUTION

• Remove burr and 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

CAUTION

• In case of removing flare nut of a indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side will fly out. Free from water into the piping when working.
• Be sure to tighten the flare nut to the specified torque with a torque wrench.
• If the flare nut is overtightened, the nut may be split after a long period has passed, and may cause a refrigerant leak.
• Please be careful when bending the copper pipe.
• Screw in manually while adjusting the center. After that, use a torque wrench to tighten the connection.

Gas leakage inspection
Please use gas leakage detector to check if leakage occurs at connection of Flare nut as shown in below. If gas leakage occurs, further tighten the connection to stop leakage.

CONNECTION OF POWER CORD

WARNING THIS APPLIANCE MUST BE EARTHED.

Detail of Cutting the Connecting Cord

WARNING

• 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 fire.

Wiring of The Indoor Unit

• For wire connection of the Indoor unit, you need to remove the front cover, the low cover under the body of the unit and terminal cover.
• Remove the cover from the terminal base and screw the cable.

Method to remove the low cover

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

How to connect the optional parts

(H-LINK RAC Adapter, Dry contact, Wired Remote Controller)

• For cable connection to control P.W.B., you need to
  remove front cover and electrical box cover.
  Each connecting location is as below.

  • Dry contact: CN6
  • H-LINK RAC Adapter: CN7B
  • Wired Remote Control : CN20

• Please check and confirm manuals attached to each optional parts for more connection details.

• Please check service manual about how to set from remote controller. ou can refer to this installation manual how to remove and re-attach the front cover.

• Please do the operation test after the connection.

HOW TO REMOVE OR ATTACH THE FRONT COVER

How to remove the front cover

1. Remove the front panel
   

2. Push the end of the right-side arm outward to release the tab

3. Move the left-side arm outward to release the left tab, and
   then pull the panel towards you.

4. Remove the filters. After removing 3 screws, pull the the center of the front cover towards you and release

5. 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. 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.
2. Assemble the cover of electric box.
3. Tighten the 3 screw.
4. Install the filter.
5. Attaching the Front Panel
   • Insert the shaft of the left arm along the step on the unit into the hole.
   • Securely insert the shaft of the right arm along the step on the unit into the hole.
   • Make sure that the front panel is securely attached, and then close the front panel.

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