LG ARUM120LTE5 INSTALLATION MANUAL

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MFL67221448

Rev. 01_091818

INSTALLATION MANUAL

AIR CONDITIONER

www.lg.com

Please read this installation manual completely before installing the product. Installation work must be performed in accordance with the national wiring standards by authorized personnel only. Please retain this installation manual for future reference after reading it thoroughly.

For Heat Pump / Heat Recovery system Original instruction

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ESPAÑOL

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TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below:

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.

Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product

WARNING

It can result in serious injury or death when the directions are ignored

CAUTION

It can result in minor injury or product damage when the directions are ignored

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

Installation

• Have all electric work done by a licensed electrician according to "Electric Facility Engineering Standard" and "Interior Wire Regulations" and the instructions given in this manual and always use a special circuit.

- If the power source capacity is

inadequate or electric work is performed improperly, electric shock or fire may result.

• Ask the dealer or an authorized technician to install the air conditioner.

- Improper installation by the user may

result in water leakage, electric shock, or fire.

• Always ground the product.

- There is risk of fire or electric shock.

• Always intstall a dedicated circuit and breaker.

- Improper wiring or installation may

cause fire or electric shock.

• For re-installation of the installed product, always contact a dealer or an Authorized Service Center.

- There is risk of fire, electric shock,

explosion, or injury.

• Do not cool excessively indoors. This may be harmful for your health and may consume more electricity.

• Block sunlight with blinds or curtains while you are operating the air conditioner.

• Keep doors or windows closed tightly while you are operating the air conditioner.

• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the air flow or weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes. Write the model number and the serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

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• Do not install, remove, or re-install the unit by yourself (customer).

- There is risk of fire, electric shock,

explosion, or injury.

• Do not store or use flammable gas or combustibles near the air conditioner.

- There is risk of fire or failure of product.

• Use the correctly rated breaker or fuse.

- There is risk of fire or electric shock.

• Prepare for strong wind or earthquake and install the unit at the specified place.

- Improper installation may cause the unit

to topple and result in injury.

• Do not install the product on a defective installation stand.

- It may cause injury, accident, or damage

to the product.

• Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or

explosion.

• When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit.

- If a different refrigerant or air is mixed

with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

• Do not reconstruct to change the settings of the protection devices.

- If the pressure switch, thermal switch,

or other protection device is shorted and operated forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

• Ventilate before operating air conditioner when gas leaked out.

- It may cause explosion, fire, and burn.

• Securely install the cover of control box and the panel.

- If the cover and panel are not installed

securely, dust or water may enter the outdoor unit and fire or electric shock may result.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

- Consult the dealer regarding the

appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.

• This equipment shall be provided with a supply conductor complying with the national regulation.

• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazrd.

Operation

• Do not damage or use an unspecified power cord.

- There is risk of fire, electric shock,

explosion, or injury.

• Use a dedicated outlet for this appliance.

- There is risk of fire or electrical shock.

• Be cautious that water could not enter the product.

- There is risk of fire, electric shock, or

product damage.

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• Do not touch the power switch with wet hands.

- There is risk of fire, electric shock,

explosion, or injury.

• When the product is soaked (flooded or submerged), contact an Authorized Service Center.

- There is risk of fire or electric shock.

• Be cautious not to touch the sharp edges when installing.

- It may cause injury.

• Take care to ensure that nobody could step on or fall onto the outdoor unit.

- This could result in personal injury and

product damage.

• Do not open the inlet grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

- There is risk of physical injury, electric

shock, or product failure.

CAUTION

Installation

• Always check for gas (refrigerant) leakage after installation or repair of product.

- Low refrigerant levels may cause failure

of product.

• Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

- It may cause a problem for your

neighbors.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the unit where combustible gas may leak.

- If the gas leaks and accumulates around

the unit, an explosion may result.

• Use power cables of sufficient current carrying capacity and rating.

- Cables that are too small may leak,

generate heat, and cause a fire.

•

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

- There is risk of damage or loss of

property.

• Keep the unit away from children. The heat exchanger is very sharp.

- It can cause the injury, such as cutting

the finger. Also the damaged fin may result in degradation of capacity.

• When installting the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

- The inverter equipment, private power

generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.

• Do not install the product where it is exposed to sea wind (salt spray) directly.

- It may cause corrosion on the product.

Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

• In order to avoid a hazard due to inadvertent resetting of the thermal cutout, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

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Operation

• Do not use the air conditioner in special environments.

- Oil, steam, sulfuric smoke, etc. can

significantly reduce the performance of the air conditioner or damage its parts.

• Do not block the inlet or outlet.

- It may cause failure of appliance or

accident.

• Make the connections securely so that the outside force of the cable may not be applied to the terminals.

- Inadequate connection and fastening

may generate heat and cause a fire.

• Be sure the installation area does not deteriorate with age.

- If the base collapses, the air conditioner

could fall with it, causing property damage, product failure, or personal injury.

• Install and insulate the drain hose to ensure that water is drained away properly based on the installation manual.

- A bad connection may cause water

leakage.

• Be very careful about product transportation.

- Only one person should not carry the product if it weighs more than 20 kg.

- Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.

- Do not touch the heat exchanger fins. Doing so may cut your fingers.

- When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also support the outdoor unit at four points so that it cannot slip sideways.

• Safely dispose of the packing materials.

- Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.

- Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.

• Turn on the power at least 6 hours before starting operation.

- Starting operation immediately after

turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.

• Do not touch any of the refrigerant piping during and after operation.

- It can cause a burn or frostbite.

• Do not operate the air conditioner with the panels or guards removed.

- Rotating, hot, or high-voltage parts can

cause injuries.

• Do not directly turn off the main power switch after stopping operation.

Wait at least 5 minutes before turning off the main power switch. Otherwise it may result in water leakage or other problems.

• Auto-addressing should be done in condition of connecting the power of all indoor and outdoour units. Auto-addressing should also be done in case of changing the indoor unit PCB.

• Use a firm stool or ladder when cleaning or maintaining the air conditioner.

- Be careful and avoid personal injury.

• Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

- There are sharp and moving parts that

could cause personal injury.

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46 Low Ambient Kit 47 High Efﬁciency Mode (Cooling Operation) 47 Auto Dust Removal Mode 47 Compressor Max. Frequency Limit 47 ODU Fan Max. RPM Limit 48 SLC (Smart Load Control) 48 Humidity Reference 48 Central Control Connection at Indoor Unit side 48 Compressor Input Current Limit 49 Power Consumption Display on wired remote controller 49 Overall Defrost Operating in Low temperature (Heating) 49 Base pan Heater operation 49 Comfort Cooling operation 50 Self-Diagnosis Function

53 CAUTION FOR REFRIGERANT LEAK

53 Introduction 53 Checking procedure of limiting concentration

54 INSTALLATION GUIDE AT THE SEASIDE

54 Model Designation 54 Airborne Noise Emission

TABLE OF CONTENTS

2 TIPS FOR SAVING ENERGY 2 IMPORTANT SAFETY INSTRUCTIONS 7 INSTALLATION PROCESS 7 OUTDOOR UNITS INFORMATION 7 ALTERNATIVE REFRIGERANT R410A 7 SELECT THE BEST LOCATION 9 INSTALLATION SPACE

9 Individual Installation

9 LIFTING METHOD 10 INSTALLATION

10 The location of the Anchor bolts 10 Foundation for Installation 11 Preparation of Piping 12 Plumbing materials and storage methods

13 REFRIGERANT PIPING INSTALLATION

13 Precautions on Pipe connection / Valve operation 13 Connection of Outdoor units 14 Caution 15 Precautions on Pipe connection / Valve operation 15 Connection of Outdoor units 15 Installation procedure for HR unit 16 Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant

Pipe

16 Type of HR Unit 16 Installation of Zoning Control 17 Caution

18 PIPE CONNECTIONS BETWEEN INDOOR

AND OUTDOOR UNIT

18 Preparation Work 18 Pipe Drawing Out during Single / Series connection 19 Refrigerant piping system 20 Preparation Work 20 Pipe Drawing Out during Single / Series connection 21 Refrigerant piping system 22 Pipe Connection Method between outdoor unit/indoor unit 26 Branch pipe Fitting 28 Distribution Method 28 Vacuum Mode 29 Leak Test and Vacuum drying 30 Refrigerant charging 31 Thermal insulation of refrigerant piping

32 ELECTRICAL WIRING

32 Caution 34 Control box and connecting position of wiring 34 Communication and Power Cables 35 Wiring of main power supply and equipment capacity 35 Point for attention regarding quality of the public electric power

supply

35 Field Wiring 37 Checking the setting of outdoor units 38 Switch for setup of HR Unit 40 Automatic Addressing 40 The Procedure of Automatic Addressing 41 Flow chart of auto pipe detection process 42 Flow chart of manual addressing for pipe detection 42 Example of manual valve addressing (Non-Zoning setting) 42 Example of manual valve addressing (Zoning setting) 43 Example of checking valve address 43 Identiﬁcation of Manual Valve ID (Address) 43 Method of checking the pipe detection result at outdoor unit 43 Setting method of Master indoor unit in zoning 43 Group Number setting 44 Cool & Heat selector 45 High Static Pressure Compensation mode 45 Night Low Noise Function 45 Overall defrost mode 45 Setting the ODU address 46 Snow removal & rapid defrost 46 Setting Capacity Up Airﬂow Adjusting for IDU (Heating) 46 Target pressure adjusting

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SELECT THE BEST LOCATION

Select space for installing outdoor unit, which will meet the following conditions:

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors due to noise of unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and leakage of combustible gas is expected.

ALTERNATIVE REFRIGERANT R410A

The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should also be considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.

CAUTION

• The above list indicates the order in which the individual work operations are normally carried out but this order may be varied where local conditions warrants such change.

• The thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8 MPa (551.1 psi).

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)

CAUTION

Notes : * We can guarantee the operation only within 130 %

combination. If you want to connect more than 130 % combination, please contact us and discuss the requirement like below.

• If the operation of indoor unit is more than 130%, the airflow is operated as low in the all indoor units.

Combination Ratio(50~200 %)

Outdoor Number Connection Ratio

Single outdoor units 200 %

Double outdoor units 160 %

Triple outdoor units 130 %

Over the triple unit 130 %

CAUTION

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8 MPa [551.1 psi]

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state. If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.

• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.

• For high-pressure refrigerant, any unapproved pipe must not be used.

• Do not heat pipes more than necessary to prevent them from softening.

• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.

OUTDOOR UNITS INFORMATION

The foundation must be level even

Outdoor unit foundation work

Avoid short circuits and ensure sufﬁcient space is allowed for service

Installation of outdoor unit

Refer to automatic addressing ﬂowchart

Automatic addressing of indoor unit

In the ﬁnal check for 24hours at 3.8MPa (38.7 kgf/cm

)[551.1psi]

there must be no drop in pressure.

Airtight test

Multiple core cable must not be used. (suitable cable should be selected)

Electrical work

(connection circuits and drive circuits)

Make sure no gaps are left where the insulating materials are joined

Heat insulation work

Make sure airﬂow is sufﬁcient

Duct work

Adjust to downward gradient

Drain pipe work

Special attention to dryness, cleanness and tightness

Refrigerant piping work

Check model name to make sure the ﬁtting is made correctly

Installation of indoor unit

Take account of gradient of drain piping

Sleeve and insert work

Make connection clearly between outdoor, indoor, remote controller and option.

Preparation of contract drawings

Indicate clearly who will be responsible for switch setting.

Determination of division work

The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour

Vacuum drying

Recharge correctly as calculated in this manual. and record the amount of added refrigerant

Additional charge of refrigerant

Make sure there are no gaps left between the facing materials used on the ceiling

Fit facing panels

Run each indoor unit in turn to make sure the pipe work has been ﬁtted correctly

Test run adjustment

Explain the use of the system as clearly as possible to your customer and make sure all relevant documentation is in order

Transfer to customer with explanation

Preheat the crank case with the electrical heater for more than 6 hours.

INSTALLATION PROCESS

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Select installation location of the HR unit suitable for following conditions

- Avoid a place where rain may enter since the HR unit is for indoor.

- Sufficient service space must be obtained.

- Refrigerant pipe must not exceed limited length.

- Avoid a place subject to a strong radiation heat from other heat source.

- Avoid a place where oil spattering, vapor spray or high frequency electric noise is expected.

- Install the unit at a place in which it is not affected by operation noise. (Installation within cell such as meeting room etc. may disturb business due to noise.)

- Place where refrigerant piping, drain piping and electrical wiring works are easy.

• Avoid unit installation in a place where acidic solution and spray

(sulfur) are often used.

• Do not use unit under any special environment where oil, steam and

sulfuric gas exist.

• It is recommended to fence round the outdoor unit in order to

prevent any person or animal from accessing the outdoor unit.

• If installation site is area of heavy snowfall, then the following

directions should be observed.

- Make the foundation as high as possible.

- Fit a snow protection hood.

• Select installation location considering following conditions to avoid

bad condition when additionally performing defrost operation.

- Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the product at a place With a high humidity in winter (near beach, coast, lake, etc.) (Ex : Rooftop where there is always sunshine.)

419 (16-1/2)

(2-13/32)

137 (5-13/32)

124 (4-7/8)

128 (5-1/32)

(1-3/16)

(2-3/8)

More than

300 (11-13/16)

(Servicing space)

More than

450 (17-23/32)

(Servicing space)

More than 100 (3-15/16)More than 100 (3-15/16) (Servicing space)(Servicing space)

More than 100 (3-15/16) (Servicing space)

More than 100 (3-15/16)More than 100 (3-15/16) (Servicing space)(Servicing space)

More than

300 (11-13/16)

More than

300 (11-13/16)

(Servicing space)

More than 100 (3-15/16) (Servicing space)

345 (13-19/32)

Inspection door (servicing space)

481 (18-15/16)

450 (17-23/32)

453 (17-27/32)

174

(6-27/32)

174

(6-27/32)

182

(7-5/32)

218 (8-19/32)

345 (13-19/32)345 (13-19/32)345 (13-19/32)

[Unit: mm(inch)]

No. Part Name

Description

PRHR042, PRHR042A PRHR032, PRHR032A

PRHR022, PRHR022A

Low pressure Gas pipe connection port

Ø 28.58 (1-1/8) Brazing connection

Ø 22.2 (7/8) Brazing connection

High pressure Gas pipe connection port

Ø 22.2 (7/8) Brazing connection

Ø19.05 (3/4) Brazing connection

Liquid pipe connection port

Ø 15.88 (5/8) Brazing connection (PRHR042, PRHR042A)

Ø 9.52 (3/8) Brazing connection

Ø 12.7 (1/2) Brazing connection (PRHR032, PRHR032A)

Indoor unit Gas pipe connection port

Ø 15.88 (5/8) Brazing connection

Indoor unit Liquid pipe connection port

Ø 9.52 (3/8) Brazing connection

6 Control box - -

7 Hanger metal M10 or M8 M10 or M8

NOTE

• Be sure to install the inspection door at the control box side.

• If reducers are used, servicing space must be increased equal to reducer's dimension.

For Heat Recovery Installation

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1500 (59)

Inlet

side

50500

(19-11/16’’)(19-11/16’’)

500

(19-11/16’’) Fron t side

500

(19-11/16’’)

240 (9-1/2’’) or more

50 (2) or more

45° or

DHHF

DHF

DHHF

DHH

INSTALLATION SPACE

Individual Installation

During the installation of the unit, consider service, inlet, and outlet acquire the minimum space as shown in the figures below.

[Unit : mm (inch)]

Category

4 sides

are

walls

Installation Space

Front

Front Front

Front

Case 1

(10(13/32)≤Side

Space≤49(13/14))

A≥10 (13/32) B≥300 (11-13/16) C≥10 (13/32) D≥500 (19-11/16)

A≥10 (13/32) B≥300 (11-13/16) C≥10 (13/32) D≥500 (19-11/16) E≥20 (25/32)

A≥10 (13/32) B≥300 (11-13/16) C≥10 (13/32) D≥500 (19-11/16) E≥20 (25/32) F≥600 (23-5/8)

A≥10 (13/32) B≥300 (11-13/16) C≥10 (13/32) D≥300 (11-13/16) E≥20 (25/32) F≥500 (19-11/16)

Case 2 (Side Space ≥49(13/14))

A≥50 (1-31/32) B≥100 (3-15/16) C≥50 (1-31/32) D≥500(19-11/16)

A≥50 (1-31/32) B≥100 (3-15/16) C≥50 (1-31/32) D≥500 (19-11/16) E≥100 (3-15/16)

A≥50 (1-31/32) B≥100 (3-15/16) C≥50 (1-31/32) D≥500 (19-11/16) E≥100 (3-15/16) F≥500 (19-11/16)

A≥50 (1-31/32) B≥100 (3-15/16) C≥50 (1-31/32) D≥100 (3-15/16) E≥100 (3-15/16) F≥500 (19-11/16)

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow areas or severe cold areas in winter so that product can be operated well.

• Get ready for seasonal wind or snow in winter even in other areas.

• Install a suction and discharge duct not to let in snow or rain.

• Install the outdoor unit In such a way that it should not come in contact with snow directly. If snow piles up and freezes on the air suction hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.

• Install the outdoor unit at the higher installation console by 50 cm (19.7 inch) than the average snowfall (annual average snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 10 cm (3.9 inch), always remove snow for operation.

- The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the product. (If width of the frame is wider than that of the product, snow may accumulate)

- Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.

Remove the Rear Grille

• Remove the rear grille in snowy area.

• Make sure that heat exchanger should not be damaged.

UXA UXB

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Front

Front Front

Rear

Front Front

Front Front Front

Only 2

sides

are

Front

Front Front

No limit for the height of wall

walls

Front

Limitati ons on

the

height

of the

wall

(Refer

to 4 side

walls)

A≥10 (13/32) B≥500 (19-11/16) C≥10 (13/32) D≥500 (19-11/16) F≥900 (35-7/16)

A≥10 (13/32) B≥500 (19-11/16) C≥10 (13/32) D≥500 (19-11/16) E≥20 (25/32) F≥1200 (47-1/4)

A≥10 (13/32) B≥500 (19-11/16) C≥10 (13/32) D≥500 (19-11/16) E≥20 (25/32) F≥1800 (70-7/8)

A≥50 (1-31/32) B≥500 (19-11/16) C≥50 (1-31/32) D≥500 (19-11/16) F≥600 (23-5/8)

A≥50 (1-31/32) B≥500 (19-11/16) C≥50 (1-31/32) D≥500 (19-11/16) E≥100 (3-15/16) F≥900 (35-7/16)

A≥50 (1-31/32) B≥500 (19-11/16) C≥50 (1-31/32) D≥500 (19-11/16) E≥100 (3-15/16) F≥1200 (47-1/4)

A≥10 (13/32) B≥300 (11-13/16)

A≥200 (7-7/8) B≥300 (11-13/16) E≥400 (15-3/4)

• The height of the wall on the front side must be 1500 mm (59 inch) or less.

• The height of the wall on the inlet side must be 500 mm (19-11/16 inch) or less.

• There is no limit to the wall on the side.

• If the height of the walls on the front and the side are higher than the limit, there must be additional space on the front and the side.

- Additional Space on the front side by 1/2 of h1

- Additional Space on the inlet side by 1/2 of h2

- h1 = A(Actual height) - 1500 mm (59 inch)

- h2 = B(Actual height) - 500 mm (19-11/16 inch)

Rear Grille

LIFTING METHOD

• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the front and rear.

• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.

• Attach the ropes to the unit at an angle of 40 ° or less.

Locking points for

transportation ropes

Forklift Carrying Hole

Forklift Carrying Guide

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• Install at places where it can endure the weight and vibration/noise of the outdoor unit.

• The outdoor unit support blocks at the bottom shall have width of at least 100 mm (3-15/16 inch) under the Unit’s legs before being fixed.

• The outdoor unit support blocks should have minimum height of 200 mm (7-7/8 inch).

• Anchor bolts must be inserted at least 75 mm (2-15/16 inch).

Chassis A [mm (inch)] B [mm (inch)]

UXA 930 (36-5/8) 730 (28-3/4) UXB 1,240 (47-1/4) 1,040 (40-15/16)

• Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.

• Use the H-beam support as a base support

• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad shall be more than 200 mm (7-7/8 inch)).

At least 200 (7.87)

Unit : mm (inch)

200(7.87)

75(2.95)

200(7.87)

100(3.94)

Ⓐ The corner part must be fixed firmly. Otherwise, the support for the

installation may be bent.

Ⓑ Get and use M10 Anchor bolt. Ⓒ Put Cushion Pad between the outdoor unit and ground support for

the vibration protection in wide area.

Ⓓ Space for pipes and wiring (Pipes and wirings for bottom side) Ⓔ H-beam support Ⓕ Concrete support

CAUTION

• Be sure to remove the Pallet(Wood Support) of the bottom side of the outdoor unit Base panel before fixing the bolt. It may cause the unstable state of the outdoor settlement, and may cause freezing of the heat exchanger resulting in abnormal operations.

• Be sure to remove the Pallet(Wood Support) of the bottom side of the outdoor unit before welding. Not removing Pallet(Wood Support) causes hazard of fire during welding.

WARNING

• Install where it can sufficiently support the weight of the outdoor unit. If the support strength is not enough, the outdoor unit may drop and hurt people.

• Install where the outdoor unit may not fall in strong wind or earthquake. If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.

• Please take extra cautions on the supporting strength of the ground, water outlet treatment(treatment of the water flowing out of the outdoor unit in operation), and the passages of the pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base panel. Use drainage instead for water outlet. The tube or pipe may freeze and the water may not be drained.

Pallet(Wood Support)

- Remove before Installation

Foundation for Installation

The location of the Anchor bolts

INSTALLATION

CAUTION

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than 20 kg (44lbs).

• PP bands are used to pack some products. Do not use them as a mean for transportation because they are dangerous.

• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.

• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging bag may suffocate children to death.

• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 8 m (26.2 ft) long.

• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent damage.

•

Hoist the unit making sure it is being lifted at its center of gravity.

Outdoor units should not be supported only by the corner supports.

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

(2-9/16)

At least

65 (2-9/16)

At least 100 mm

(3-15/16 inch)

Center of the Unit

At least 100 mm

(3-15/16 inch)

Center of the Unit

Unit : mm (inch)

(2-9/16)

At least

65 (2-9/16)

731 (28-25/32)

760 (29-29/32)

Page 11

ENGLISH

Check

- Compare the flared work with figure below.

- If flare is noted to be defective, cut off the flared section and do flaring work again.

Burrs removal

- Completely remove all burrs from the cut cross section of pipe/tube.

- Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing.

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Flare shape and ﬂare nut tightening torque

Opening shutoff valve

Precautions when connecting pipes

- See the following table for flare part machining dimensions.

- When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first. (Use ester oil or ether oil.)

See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)

- After all the piping has been connected, use nitrogen to perform a gas leak check.

1 Remove the cap and turn the valve counter clockwise with the

hexagon wrench.

2 Turn it until the shaft stops.

Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a backseat type. Always use the special tool.

3 Make sure to tighten the cap securely.

Pipe size

[mm (inch)]

Tightening Torque

N.m (lbs.ft)

A [mm (inch)] Flare shape

Ø9.52 (3/8) 38±4 (28±3.0) 12.8 (0.5)~13.2 (0.52)

Ø12.7 (1/2) 55±6 (41±4.4) 16.2 (0.64)~16.6 (0.65)

Ø15.88 (5/8) 75±7 (55±5.2) 19.3 (0.76)~19.7(0.78)

CAUTION

• Always use a charge hose for service port connection.

•

After tightening the cap, check that no refrigerant leaks are present

• When loosening a flare nut, always use two wrenches in combination, When connecting the piping, always use a spanner and torque wrench in combination to tighten the flare nut.

• When connecting a flare nut, coat the flare(inner and outer faces) with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as the initial tightening.

Union

Closing shutoff valve

1 Remove the cap and turn the valve clockwise with the hexagon

wrench.

2 Securely tighten the valve until the shaft contacts the main body seal. 3 Make sure to tighten the cap securely.

* For the tightening torque, refer to the table on the below.

Tightening torque

Shut

off

valve

size

(mm

(inch))

Tightening torque N.m (lbs.ft) (Turn clockwise to close)

Shaft

(valve body)

Cap

(Valve lid)

Service

port

Flare nut

Gas line

piping

attached

to unit

Closed Opened

Hexagonal

wrench

Ø6.35

(1/4)

6.0±0.6

(4.4±0.4)

5.0±0.0

(3.7±0.4)

4 mm

(0.16 inch)

17.6±2.0

(13.0±1.5)

12.7±2

(9.4±1.5)

16±2

(12±1.5)

Ø9.52

(3/8)

38±4

(28±3.0)

Ø12.7

(1/2)

10.0±1.0 (7.4±0.7)

20.0±2.0

(14.8±1.5)

55±6

(41±4.4)

Ø15.88

(5/8)

12.0±1.2 (8.9±0.9)

5 mm

(0.24 inch)

25.0±2.5

(18.4±1.8)

75±7

(55±5.1)

Ø19.05

(3/4)

14.0±1.4

(10.3±1.0)

110±10

(81.1±7.4)

Ø22.2

(7/8)

30.0±3.0

(22.1±2.2)

8 mm

(0.31 inch)

Ø25.4

(1)

25±3

(18.5±2.2)

Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

Cut the pipes and the cable

- Use the accessory piping kit or the pipes purchased locally.

- Measure the distance between the indoor and the outdoor unit.

- Cut the pipes a little longer than measured distance.

- Cut the cable 1.5 m (4.92 ft) longer than the pipe length.

Preparation of Piping

Pipe

Reamer

Point down

Copper

tube

90°

Slanted Uneven Rough

Flaring work

- Carry out flaring work using flaring tool as shown below.

Firmly hold copper tube in a bar(or die) as indicated dimension in the table above.

Pipe diameter

Inch (mm)

A inch (mm)

Wing nut type Clutch type

Ø1/4 (Ø6.35)

0.04~0.07 (1.1~1.8) 0~0.02 (0~0.5)

Ø3/8 (Ø9.52) Ø1/2 (Ø12.7)

Ø5/8 (Ø15.88)

Insulation of shutoff valve

1 Use the heat insulation material for the refrigerant piping which has

an excellent heat-resistance (over 120 °C [248 °F]).

Copper tube

Flare nut

Bar

"A"

90°

±2

45°

R=0.4~0.8

Copper pipe

Page 12

ENGLISH

Refrigerant piping on three principles

Drying Cleanliness Airtight

Should be no moisture

inside

No dust inside.

There is no refrigerant

leakage

Items

Moisture

Dust

Leakage

Cause failure

- Significant hydrolysis of refrigerant oil

- Degradation of refrigerant oil

- Poor insula’tion of the compressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Degradation of refrigerant oil

- Poor insulation of the compressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Gas shortages

- Degradation of refrigerant oil

- Poor insulation of the compressor

- Do not cold and warm

Counter

measure

No moisture in the pipe

- Until the connection is completed, the plumbing pipe entrance should be strictly controlled.

- Stop plumbing at rainy day.

- Pipe entrance should be taken side or bottom.

When removal burr after cutting pipe, pipe entrance should be taken down.

- Pipe entrance should be fitted cap when pass through the walls.

- No dust in the pipe.

- Until the connection is completed, the plumbing pipe entrance should be strictly controlled.

- Pipe entrance should be taken side or bottom.

- When removal burr after cutting pipe, pipe entrance should be taken down.

- Pipe entrance should be fitted cap when pass through the walls.

- Airtightness test should be.

- Brazing operations to comply with standards.

- Flare to comply with standards.

- Flange connections to comply with standards.

Nitrogen substitution method

Welding, as when heating without nitrogen substitution a large amount of the oxide film is formed on the internal piping.

The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil pump in compressor.

It prevents normal operation of the compressor. In order to avoid this problem, Welding should be done after replacing

air by nitrogen gas. When welding plumbing pipe, the work is required.

• Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas): Please use the following nitrogen pressure 0.02 MPa (2.9 psi) Oxygen - Promotes oxidative degradation of refrigerant oil. Because it is flammable, it is strictly prohibited to use Carbon dioxide - Degrade the drying characteristics of gas Chevron Gas - Toxic gas occurs when exposed to direct flame.

•

Always use a pressure reducing valve.

•

Please do not use commercially available antioxidant. The residual material seems to be the oxide scale is observed. In fact, due to the organic acids generated by oxidation of the alcohol contained in the anti-oxidants, ants nest corrosion occurs. (causes of organic acid → alcohol + copper + water + temperature)

CAUTION

Regulator

Nitrogen gas Pressure 0.02 MPa (2.9 psi) less

Auxiliary valve

Taping

(Should not

contain air)

Welding Point

Note) should not block the outlet side. When the internal pressure in pipe is abo ve the atmospheric pressure, pinhole is occurred and it is a leakage cause.

Oxide scale

Nitrogen

Plumbing materials and storage methods

Pipe must be able to obtain the specified thickness and should be used with low impurities. Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound. Should not be mixed with contaminations such as dust, moisture.

2 Precautions in high humidity circumstance:

This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default. However, if it is operated for a long time in high humid atmosphere (dew point temperature: More than 23 °C [73.4 °F]), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

- Heat insulation material to be prepared: EPDM (Ethylene Propylene Diene Methylene)-over 120 °C [248 °F] the heat-resistance temperature.

- Add the insulation over 10 mm [0.39 inch] thickness at high

humidity environment.

Indoor unit

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

Page 13

ENGLISH

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes. (Animals or foreign objects may be brought in to damage wires.)

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas leakage after the work.

For Heat Pump System Installation

A≥B≥C≥D (Capability) ① IDU side connection pipe ② ODU to ODU connection pipe (1st branch) ③ ODU to ODU connection pipe (2st branch) ④ ODU to ODU connection pipe (3rd brach)

2 Unit

3 Unit

4 Unit

ARCNN21

ARCNN31

ARCNN41

Outdoor units Model

Liquid Pipe Gas Pipe

I.D.15.88 I.D.15.88

I.D.15.88

I.D.19.05

I.D.12.7

I.D.9.52

331

314

I.D.22.2

O.D.19.05

O.D.12.7

I.D.9.52

334 281

I.D.15.88

I.D.19.05

I.D.12.7

I.D.22.2

334 281

I.D.15.88

I.D.19.05

I.D.12.7

I.D.22.2

I.D.28.58

I.D.22.2

O.D.19.05

O.D.22.2

I.D.28.58

I.D.31.8

I.D. 19.05

O.D.15.88

I.D. 19.05O.D.15.88

I.D.22.2O.D.19.05

I.D.19.05O.D.15.88

I.D.12.7

I.D.15.88

O.D.19.05

I.D.28.58

O.D.22.2

125

I.D.41.3

O.D.34.9

111

130

416 408

I.D.28.58 I.D.28.58

I.D.34.9

I.D.41.3 I.D.38.1

O.D.34.9

I.D.31.8

I.D.22.2

I.D.28.58

341

111

298

I.D.34.9

I.D.41.3

I.D.28.58

134

415 375

I.D.44.48 I.D.53.98

I.D.41.3

I.D.28.58

I.D.34.9O.D. 28.58I.D.22.2

I.D.34.9O.D.28.58I.D.22.2

I.D.53.98

I.D.44.5

O.D.41.3

I.D.34.9O.D.28.58I.D.22.2

O.D.41.3I.D. 44.5I.D.53.98

O.D.34.9

I.D.28.58

2, 3, 4 Outdoor Units

For more information, refer accessory installation manual.

Y branch

To outdoor unit To branch piping or indoor unit

A B

Viewed from point A in direction of arrow

Within +/- 10

Connection of Outdoor units

When installing ODU series, refer below picture.

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the branching parts.

- Use hexagonal wrench to open/close the valve. h In case of the heat pump system installation, be sure to maintain to

close no use pipe like below picture.

h Refer to the accessory installation manual provided.

REFRIGERANT PIPING INSTALLATION

Service Port

Liquid pipe

No Use (Weld with supplied accessory pipe cap)

Gas pipe

(Master)

(Slave1)

(Slave2)

(Slave3)

Page 14

ENGLISH

6 If the diameters of the branch piping of the designated refrigerant

piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping.

7 Always observe the restrictions on the refrigerant piping (such as

rated length, difference in height, and piping diameter). Failure to do so can result in equipment failure or a decline in heating/cooling performance.

8 A second branch cannot be made after a header. (These are shown

by .)

To Outdoor Unit

Sealed Piping

A B

9 The Multi V will stop due to an abnormality like excessive or

insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.

10 Never perform a pump down. This will not only damage the

compressor but also deteriorate the performance.

11 Never use refrigerant to perform an air purge. Always evacuate air

by using a vacuum pump.

12 Always insulate the piping properly. Insufficient insulation will

result in a decline in heating/cooling performance, drip of condensate and other such problems.

13 When connecting the refrigerant piping, make sure the service

valves of the Outdoor Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.

14 Always use a non-oxidizing brazing material for brazing the parts

and do not use flux. If not, oxidized film can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

• After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the installation pipe drawing.

2 Commercially available piping often contains dust and other

materials. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from entering

the piping during installation.

4 Reduce the number of bending portions as much as possible, and

make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold

separately.

Y branch

Header

4 branches 7 branches 10 branches

ARBLB01621, ARBLB03321, ARBLB07121, ARBLB14521,

ARBLB23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Caution

1 Use the following materials for refrigerant piping.

- Material: Seamless phosphorous deoxidized copper pipe

- Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8 MPa (551 psi). We recommend the following table as the minimum wall thickness.

Outer diameter

[mm(inch)]

6.35 (1/4)

9.52 (3/8)

12.7 (1/2)

15.88 (5/8)

19.05 (3/4)

22.2 (7/8)

25.4 (1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

44.45

(1-3/4)

53.98

(2-1/8)

Minimum thickness

[mm(inch)]

0.8

(0.03)

0.8

(0.03)

0.8

(0.03)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

1.1

(0.04)

1.21

(0.05)

1.35

(0.05)

1.43

(0.06)

1.55

(0.06)

2.1

(0.08)

Page 15

ENGLISH

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes. (Animals or foreign objects may be brought in to damage wires.)

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas leakage after the work.

For Heat Recovery System Installation

111

416 408

I.D.28.58 I.D.28.58

I.D.34.9I.D.31.8

I.D.22.2

I.D.28.58

125

I.D.41.3

O.D.34.9

2 Unit

3 Unit

4 Unit

ARCNB21

ARCNB31

ARCNB41

Outdoor units Model

Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe

111

130

416 408

I.D.28.58 I.D.28.58

I.D.34.9

I.D.41.3 I.D.38.1

O.D.34.9

I.D.31.8

I.D.22.2

I.D.28.58

111

130

416 408

I.D.28.58 I.D.28.58

I.D.34.9

I.D.41.3 I.D.38.1

O.D.34.9

I.D.31.8

I.D.22.2

I.D.28.58

I.D.15.88 I.D.15.88

I.D.15.88

I.D.19.05

I.D.12.7

I.D.9.52

331

314

I.D.22.2

O.D.19.05

O.D.12.7

I.D.9.52

341

111

298

I.D.34.9

I.D.41.3

I.D.28.58

341

111

298

I.D.34.9

I.D.41.3

I.D.28.58

334 281

I.D.15.88

I.D.19.05

I.D.12.7

I.D.22.2

134

415 375

I.D.44.48 I.D.53.98

I.D.41.3

I.D.28.58

334 281

I.D.15.88

I.D.19.05

I.D.12.7

I.D.22.2

I.D.34.9O.D. 28.58I.D.22.2

I.D.34.9O.D.28.58I.D.22.2

I.D.53.98

I.D.44.5

O.D.41.3 I.D.28.58

I.D.22.2

O.D.19.05 I.D.44.5

I.D.41.3

O.D.34.9

I.D.34.9O.D.28.58I.D.22.2

O.D.41.3I.D. 44.5I.D.53.98

O.D.41.3

I.D.44.5

I.D.53.98

O.D.41.3I.D.44.5I.D.53.98

I.D.22.2O.D.28.58I.D.34.9

O.D.22.2

I.D.28.58

I.D.31.8

I.D.22.2

O.D.28.58

I.D. 34.9

I.D. 19.05

I.D.22.2

O.D.28.58

I.D. 19.05

O.D.15.88

I.D. 19.05O.D.15.88

I.D.22.2O.D.19.05

I.D.19.05O.D.15.88

O.D.34.9

I.D.28.58

I.D.12.7

I.D.15.88

O.D.19.05

I.D.15.88

I.D.19.05

O.D.22.2

I.D.28.58

I.D.22.2

O.D.190.05

A≥B≥C≥D (Capability) ① IDU side connection pipe ② ODU to ODU connection pipe (1st branch) ③ ODU to ODU connection pipe (2st branch) ④ ODU to ODU connection pipe (3rd brach)

2, 3, 4 Outdoor Units

For more information, refer accessory installation manual.

Y branch

To outdoor unit To branch piping or indoor unit

A B

Viewed from point A in direction of arrow

Within +/- 10

Installation procedure for HR unit

1 Using an insert-hole-in- anchor, hang the hanging bolt. 2 Install a hexagon nut and a flat washer (locally-procured)to the

hanging bolt as shown in the figure in the bottom, and fit the main unit to hang on the hanger metal.

3 After checking with a level that the unit is level, tighten the hexagon

nut. * The tilt of the unit should be within ±5 ° in front/back and left/right.

4 This unit should be installed suspended from ceiling and side A

should always be facing up.

5 Insulate not used pipes completely as shown in the figure.

Hanger metal

Flat washer

Connection of Outdoor units

When installing ODU series, refer below picture.

Precautions on Pipe connection / Valve operation

- Use hexagonal wrench to open/close the valve.

Service Port

Liquid pipe

Low Pressure Gas pipe

High Pressure Gas pipe

(Master)

(Slave1)

(Slave2)

(Slave3)

Six-sided Nut (M10 or M8)

Hanger metal

Flat washer

Flat washer (M10)

Hanging bolt (M10 or M8)

Insulation

Page 16

ENGLISH

Gas pipe

Liquid pipe

HR Unit

High Pressure Gas Pipe

Liquid pipe

Low Pressure Gas Pipe

Pipe connection From left side

Pipe connection From right side

Parallel

pipe

connection

Whenever connecting the indoor units with the HR unit, install the indoor units in numerical order from No.1.

Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X),

No.1, 3, 4 (X), No.2, 3, 4 (X).

CAUTION

Gas pipe Ø15.88 (5/8) Liquid pipe Ø9.52 (3/8) Brazing Type

Remove caps on The brazing part.

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

HR unit

PRHR022

PRHR022A

PRHR032

PRHR032A

PRHR042

PRHR042A

Low pressure

gas pipe

Ø 22.2 (7/8) Ø 28.58 (1-1/8) Ø 28.58 (1-1/8)

High pressure

gas pipe

Ø 19.05 (3/4) Ø 22.2 (7/8) Ø 22.2 (7/8)

Liquid pipe Ø 9.52 (3/8) Ø 12.7 (1/2) Ø 15.88 (5/8)

Installation of Zoning Control

Some indoor unit can be connected to one port of HR unit.

WARNING

• A branch pipe of HR unit allows up to 14.1 kW (48 kBtu/h) based on cooling capacity of the indoor unit. (up to 14.1 kW (48 kBtu/h) for max installation)

• The maximum total capacity of indoor units connected to a PRHR042 or PRHR042A HR unit is 56.4 kW (192 kBtu/h).

• The maximum number of indoor units connected to a PRHR042 or PRHR042A HR unit are 32 indoor units. (The Maximum indoor units per a branch pipe of HR unit are 8 indoor units)

• There is not operate “Auto-changeover” & “Mode override” function in the zoning group.

• When there are operating indoor units on cooling(heating) mode, another indoor units aren’t changed on heating(cooling) mode in the zoning group.

Joint Method of HR Unit (Big Duct : ARNU76GB8-, ARNU763B8-, ARNU96GB8-, ARNU963B8-)

Joint Method is required when the big duct chassis is installed. In Joint Method, two neighboring outlets of one HR unit are linked by Y branch pipe and connected to one indoor unit.

Type of HR Unit

Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types by the number of connectable indoor units.

Ex) Installation of 6 indoor units

Consists of HR unit for 4 branches and HR unit for 2 branches.

PRHR032 or PRHR032A

(3 branches)

PRHR022 or PRHR022A

(2 branches)

PRHR042 or PRHR042A

(4 branches)

Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant Pipe

3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pressure gas pipe and high pressure gas pipe depending on status of refrigerant passing through the pipe.

You must connect 3 pipes from outdoor unit to HR unit. For connection between indoor unit and HR unit, you must connect

both liquid pipe and gas pipe from the HR unit to the indoor unit. In this case, connect them to the indoor unit starting from No.1 connection port of the HR unit (the port number is displayed on ports of the HR unit). Use auxiliary flare as annexed parts in connection to the indoor unit.

[Unit : mm (inch)]

1st HR Unit 2nd HR Unit

1 2 3 4

(96k) (28k)

1 2 3 4

(76k)(21k)

HR unit HR unit

Zoning control group 1 Zoning control group 2

(Max. 8 Indoor Units)

Changeover under control Auto changeover Changeover under control

sealing

(Max. 8 Indoor Units)

Page 17

ENGLISH

Caution

1 Use the following materials for refrigerant piping.

- Material: Seamless phosphorous deoxidized copper pipe

- Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8 MPa (551 psi). We recommend the following table as the minimum wall thickness.

[Reducers for indoor unit and HR unit]

Unit : mm (inch)

Outer diameter

[mm(inch)]

6.35 (1/4)

9.52 (3/8)

12.7 (1/2)

15.88 (5/8)

19.05 (3/4)

22.2 (7/8)

25.4 (1)

28.58 (1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

44.45

(1-3/4)

53.98

(2-1/8)

Minimum thickness

[mm(inch)]

0.8

(0.03)

0.8

(0.03)

0.8

(0.03)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

1.1

(0.04)

1.21

(0.05)

1.35

(0.05)

1.43

(0.06)

1.55

(0.06)

2.1

(0.08)

6 If the diameters of the branch piping of the designated refrigerant

piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping.

7 Always observe the restrictions on the refrigerant piping (such as

rated length, difference in height, and piping diameter). Failure to do so can result in equipment failure or a decline in heating/cooling performance.

8 A second branch cannot be made after a header. (These are shown

by .)

To Outdoor Unit

Sealed Piping

A B

9 The Multi V will stop due to an abnormality like excessive or

insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.

10 Never perform a pump down. This will not only damage the

compressor but also deteriorate the performance.

11 Never use refrigerant to perform an air purge. Always evacuate air

by using a vacuum pump.

12 Always insulate the piping properly. Insufficient insulation will

result in a decline in heating/cooling performance, drip of condensate and other such problems.

13 When connecting the refrigerant piping, make sure the service

14 Always use a non-oxidizing brazing material for brazing the parts

and do not use flux. If not, oxidized film can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

2 Commercially available piping often contains dust and other

materials. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from entering

the piping during installation.

4 Reduce the number of bending portions as much as possible, and

make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold

separately.

Y branch

Header

4 branches 7 branches 10 branches

ARBLB01621, ARBLB03321, ARBLB07121, ARBLB14521,

ARBLB23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Models

Indoor unit

reducer

HR unit reducer

PRHR022

PRHR022A

PRHR032, PRHR042

PRHR032A,

OD15.88(5/8) Ø12.7(1/2) Ø9.52(3/8)

PRHR042A

Liquid pipe

Ø6.35(1/4)OD9.52(3/8)

High pressure

OD19.05(3/4) Ø15.88(5/8)

OD12.7(1/2) Ø9.52(3/8)

OD22.2(7/8) Ø19.05(3/4)Ø15.88(5/8)

OD15.88(5/8) Ø12.7(1/2)

Gas pipe

Low pressure

–

Ø12.7(1/2)

OD15.88(5/8) Ø

12.7(1/2)

OD22.2(7/8)Ø19.05(3/4) Ø15.88(5/8)

OD15.88(5/8) Ø12.7(1/2)

OD28.58(1-1/8)Ø22.2(7/8) Ø19.05(3/4)

OD19.05(3/4) Ø15.88(5/8)

Page 18

ENGLISH

- Pipe connections can be done on the front side or on the side according to the installation environments.

- Be sure to let 0.2 kgf/cm

(2.8 psi) Nitrogen flow in the pipe when

welding.

- If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe and disturb the normal operations of valves and condensers.

Nitrogen Direction

Knock Out for

Liquid pipe

Knock Out for Gas Pipe

Knock Out for power supply cable

Removal area for pipes

bottom side connections.

Knock Out for

communication cable

CAUTION

• Do not give damage to the pipe/base during the Knock Out work.

• Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when connecting wires using Knock Outs.

For Heat Pump System Installation

Liquid pipe

Gas pipe

Liquid pipe

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether all the pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

Service Port

Liquid pipe

Gas pipe

Leakage

Prevention Cap

Not used (keep closed)

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front side pipe drawing out.

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Chassis UXA UXB

HP 8 10 12 14/16 18/20/22 24/26

A(mm)

9.52(3/8) 9.52(3/8) 12.7(1/2) 12.7(1/2) 15.88(5/8) 15.88(5/8)

B(mm)

19.05(3/4) 22.2(7/8) 28.58(1-1/8) 28.58(1-1/8) 28.58(1-1/8) 34.9(1-3/8)

C(mm)

19.05(3/4) 19.05(3/4) 19.05(3/4) 22.2(7/8) 22.2(7/8) 28.58(1-1/8)

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

* Elbow is Field supplied * Elbow size are same as Pipe 'A', 'C'.

Left Side

Pipe Draw

Out

Front Pipe Draw Out

Right Side Pipe Draw Out

Refrigerant Pipe

Nitrogen

Nitrogen Direction

Direction

Taping

Regulator

Valve

Nitrogen

Page 19

ENGLISH

Method of drawing out pipes on the bottom side

- Drawing out common pipe through side panel

h Please weld with the proper Low pressure Gas pipe included with

product.

Combination of Y branch/header Method

Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Header Ⓕ : Sealed piping

h * : See Table 4

Y branch method

Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units

h * : See Table 4

Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units Ⓔ : Connection branch

pipe between Outdoor units: ARCNN41

Ⓕ : Connection branch

pipe between Outdoor units : ARCNN31

Ⓖ : Connection branch

pipe between Outdoor units : ARCNN21

Y branch method

h * : See Table 4

Combination of Y branch/ header Method

Ⓐ : Outdoor Unit Ⓑ : 1st branch(Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Connection branch pipe

between Outdoor units : ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units : ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units : ARCNN21

Ⓗ : Header Ⓘ : Sealed piping

h * : See Table 4

Header Method

Ⓐ : Outdoor Unit Ⓑ : Header Ⓒ : Indoor Units Ⓓ : Sealed piping Ⓔ : Connection branch pipe

between Outdoor units : ARCNN41

Ⓕ : Connection branch pipe

between Outdoor units : ARCNN31

Ⓖ : Connection branch pipe

between Outdoor units : ARCNN21

Series Outdoor Units (2 Units ~ 4 Units)

Header Method

Ⓐ : Outdoor Unit Ⓒ : Indoor Units Ⓓ : Sealed piping Ⓔ : Header

Refrigerant piping system 1 Outdoor Units

Liquid pipe

Remove Knock Out for the pipes

No Use (Weld with supplied accessory pipe cap)

Gas pipe

H 110 m [361 ft]

h 40 m [131 ft]

H 110 m [361 ft]

L 150 m [492 ft] (200 m [656 ft])

l 40 m [131 ft] (90m [295 ft])

L 150 m [492 ft] (200 m [656 ft])

l 40 m [131 ft] (90m [295 ft])

Indoor Unit

h 40 m(131 ft)

Slave3

Slave2

10m or

less

H 110 m [361 ft]

Slave3

10m or

less

H 110 m [361 ft]

Slave3

Slave2

10m or

less

H 110 m [361 ft]

Slave1

Slave2

Slave1

Master

h 40 m (131 ft)

Slave1

Master

h 40 m (131 ft)

ODU Capacity Master ≥ Slave 1 ≥Slave 2 ≥Slave 3

Slave3

Slave2

Slave1

Master

L 150 m [492 ft] (200 m [656 ft])

l 40 m [131 ft] (90m [295 ft])

ODU Capacity Master ≥ Slave 1 ≥Slave 2 ≥Slave 3

Slave3

Slave2

Slave1

L 150 m [492 ft] (200 m [656 ft])

40 m [131 ft] (90m [295 ft]

ODU Capacity Master ≥ Slave 1 ≥Slave 2 ≥Slave 3

Slave3

Slave2

Slave1

Master

L 200 m [656 ft]

40 m [131 ft]

Master

Indoor

Unit

h 40 m (131 ft)

L 200 m [656 ft]

l 40 m [131 ft]

H 110 m [361 ft]

h 40 m [131 ft]

Page 20

ENGLISH

Knock Out for

Liquid pipe

Knock Out for low pressure gas pipe

Knock Out for high pressure gas pipe

Knock Out for power supply cable

Removal area for pipes

bottom side connections.

Knock Out for

communication cable

CAUTION

• Do not give damage to the pipe/base during the Knock Out work.

• Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when connecting wires using Knock Outs.

For Heat Recovery System Installation

High Pressure Gas pipe

Liquid pipe

Low Pressure Gas pipe

High Pressure

Gas pipe

Liquid pipe

Low Pressure Gas pipe

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether the liquid/gas pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

Service Port

Liquid pipe

Low Pressure

Gas pipe

High Pressure Gas pipe

Leakage

Prevention Cap

Method of drawing out pipes on the bottom side

- Drawing out common pipe through side panel

* Elbow is Field supplied * Elbow size are same as Pipe 'A', ‘B‘, 'C'.

Chassis UXA UXB

HP 8 10 12 14/16 18/20/22 24/26

A(mm) 9.52(3/8) 9.52(3/8) 12.7(1/2) 12.7(1/2) 15.88(5/8) 15.88(5/8)

B(mm) 19.05(3/4) 22.2(7/8)

28.58

(1-1/8)

28.58 (1-1/8)

28.58

(1-1/8)

34.9

(1-3/8)

C(mm) 19.05(3/4) 19.05(3/4) 19.05(3/4) 22.2(7/8) 22.2(7/8)

28.58

(1-1/8)

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front side pipe drawing out.

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Liquid pipe Low Pressure Gas pipe

High Pressure Gas pipe

Remove Knock Out for the bottom side of Liquid / Gas pipe

Page 21

ENGLISH

- Case 1 ("a") : Maximum height is 15 m (49.2 ft) if you install with Y branch.

- Case 2 ("b") : Maximum height is 5 m (16.4 ft) in serial connection of HR units.

(**) Conditional Application (In case of D12 is the farthest in door)

Below condition must be satisfied for 40~90 m (131~295 ft) piping length after first branch.

Diameter of pipes between first branch and the last branch should be increased by one step, except if the pipe diameter B, C3 is same as diameter A (main pipe diameter) Ø 6.35 (1/4), Ø 9.52 (3/8), Ø 12.7 (1/2), Ø 15.88 (5/8), Ø 19.05 (3/4), Ø 22.2 (7/8), Ø 25.4* (1), Ø 28.58 (1-1/8), Ø 31.8* (1-1/4), Ø 34.9 (1-3/8), Ø 3 8.1* (1-1/2) * : If available on site, select this pipe size.

Otherwise it doesn’t need to be increased

While calculating total refrigerant piping length, pipe B, C3 length should be calculated twice. A + B x 2 + C3 x 2 + C1 + C2 + a + b + c + d + e + f + g + i + j + k + l + m + n ≤ 1 000 m (3281 ft)

Length of pipe from each indoor unit to the closest HR unit (a, b, c, d, e, f, g, i, j, k, l, m, n) ≤ 40 m (131 ft)

[Length of pipe from outdoor unit to the farthest indoor unit D12 (B+C3+K)

- [Length of pipe from outdoor unit to the closest indoor unit D1 (C1+a)]

≤ 40 m (131 ft)

- * : Assume equivalent pipe length of Y branch to be 0.5 m (1.64 ft), that of header to be 1m (3.3 ft), calculation purpose

- It is recommended that indoor unit is installed at lower position than the header.

- ** : To apply conditional application.

Refrigerant pipe diameter from branch to branch (B,C)

Downward indoor unit total capacity

[kW(Btu/h)]

Liquid pipe [mm(inch)]

Gas pipe [mm(inch)]

Low pressure High pressure

≤ 5.6(19,100)

Ø 6.35(1/4) Ø 12.7(1/2) Ø 9.52(3/8) < 16.0 (54,600) Ø 9.52(3/8) Ø 15.88(5/8) Ø 12.7(1/2) < 22.4 (76,400) Ø 9.52(3/8) Ø 19.05(3/4) Ø 15.88(5/8)

< 33.6(114,700) Ø 9.52(3/8) Ø 22.2(7/8) Ø 19.05(3/4) < 50.4(229,000) Ø 12.7(1/2) Ø 28.58(1 1/8) Ø 22.2(7/8) < 61.6(210,600) Ø 15.88(5/8) Ø 28.58(1 1/8) Ø 22.2(7/8)

< 72.8(210,600) Ø 15.88(5/8) Ø 34.9(1 3/8) Ø 28.58(1 1/8) < 100.8(344,000) Ø 19.05(3/4) Ø 34.9(1 3/8) Ø 28.58(1 1/8) < 173.6(592,500) Ø 19.05(3/4) Ø 41.3(1 5/8) Ø 34.9(1 3/8) < 184.8(630,700) Ø 22.2(7/8) Ø 44.5(1 3/4) Ø 41.3(1 5/8) ≤ 224.0(764,400)

Ø 22.2(7/8) Ø 53.98(2 1/8) Ø 44.5(1 3/4)

Total pipe length = A + B + C1 + C2 + C3 + a + b + c + d + e + f + g + i + j + k + l + m + n ≤ 1,000m (3,280ft)

Longest pipe length * Equivalent pipe length A+B+C3+D+k ≤ 150 m (200 m**) [(492 ft(656 ft**)] A+B+C3+D+k ≤ 175 m (225 m**) [(574 ft(738 ft**)]

Longest pipe length after 1st branch B+C3+D+k ≤ 40 m(90 m**) [131 ft (295 ft)]

Difference in height(Outdoor Unit ÷ Indoor Unit) H ≤ 110 m (361 ft)

Difference in height (Indoor Unit ÷ Indoor Unit) h ≤ 40 m (131 ft)

Difference in height (Outdoor Unit ÷ Outdoor Unit) h1 ≤ 5 m (16.4 ft)

"a", "b"

Difference in height(HR unit ÷ HR unit) a ≤ 15 m (49 ft), b ≤ 5 m (16 ft)

WARNING

When the equivalent length between a outdoor and the farthest

indoor unit is 90 m (295 ft) or more, main pipe(A) must be increased

one grade.

Refrigerant pipe diameter from branch to branch (B,C,D)

WARNING

* : Serial connection of HR units : Capacity sum of indoor units ≤

192.4 kBtu/hr

• Refer to the HR unit PCB part for the valve group control setting.

• It is recommended that difference in pipe lengths between an HR unit and indoor units, for example difference in length of a, b, c, and d, be minimized. The larger difference in pipe lengths, the more different performance between indoor units.

• Piping length from outdoor branch to outdoor unit ≤ 10 m (33 ft), equivalent length : max 13 m (43ft)

* If the large capacity indoor units (Over 5 HP; using over

Ø 15.88 (5/8) / Ø 9.52 (3/8)), are installed, it should be used the Valve Group setting

Refrigerant piping system

4 Outdoor Units

Example : 12 Indoor Units connected

Ⓐ : Outdoor Unit Ⓑ : Y branch Ⓓ : Indoor Unit Ⓔ : Connection branch pipe between Outdoor units : ARCNB41 Ⓕ : Connection branch pipe between Outdoor units : ARCNB31 Ⓖ : Connection branch pipe between Outdoor units : ARCNB21 Ⓗ : Header Ⓘ : HR Unit

Slave 3

Slave 2

Slave 1

Master

m o

r l

ess

"a"

ODU Capacity

Master ≥ Slave1 ≥ Slave 2 ≥ Slave 3

"b"

sealing

Page 22

ENGLISH

Refrigerant pipe diameter from outdoor unit to ﬁrst branch. (A)

Y branch, Header and HR unit connection pattern

* If available on site, select pipe size according to upper table.

Otherwise it doesn’t need to be increased

Pattern 1

HR1

48 k 48 k

1 2

HR2

48 k 48 k

3 4

• Impossible installation : Head branch pipe HR unit

Pattern 2

HR1

234567

7 k 7 k 7 k 7 k 7 k 24 k 24 k

• Impossible installation : HR unit Head branch pipe Y and Head branch pipe.

ODU.

Capacity

(hp)

Standard Pipe Diameter

Pipe diameter when pipe length is ≥

90 m (295 ft) or when height differential

(ODU÷IDU) is > 50 m (164 ft)

Liquid Pipe

mm (inch)

Low pressure

gas pipe

mm (inch)

High pressure

gas pipe

mm (inch)

Liquid Pipe mm (inch)

Low pressure

gas pipe

mm (inch)

High pressure

gas pipe

mm (inch)

Ø 9.52 (3/8) Ø 19.05 (3/4) Ø 15.88 (5/8) Ø 12.7 (1/2)

Not increased Not increased

Ø 9.52 (3/8) Ø 22.2 (7/8) Ø 19.05 (3/4) Ø 12.7 (1/2)

Not increased Not increased

Ø 12.7 (1/2) Ø 28.58 (1-1/8) Ø 19.05 (3/4) Ø 15.88 (5/8)

Not increased Not increased

14~16

Ø 12.7 (1/2) Ø 28.58 (1-1/8) Ø 22.2 (7/8) Ø 15.88 (5/8)

Not increased Not increased

18~20

Ø 15.88 (5/8) Ø 28.58 (1-1/8) Ø 22.2 (7/8) Ø 19.05 (3/4)

Not increased Not increased

Ø 15.88 (5/8) Ø 28.58 (1-1/8) Ø 28.58 (1-1/8) Ø 19.05 (3/4)

Not increased Not increased

Ø 15.88 (5/8) Ø 34.9 (1-3/8) Ø 28.58 (1-1/8) Ø 19.05 (3/4)

Not increased Not increased

26~34

Ø 19.05 (3/4) Ø 34.9 (1-3/8) Ø 28.58 (1-1/8) Ø 22.2 (7/8)

Not increased Not increased

Ø 19.05 (3/4) Ø 41.3 (1-5/8) Ø 28.58 (1-1/8) Ø 22.2 (7/8)

Not increased Not increased

38~60

Ø 19.05 (3/4) Ø 41.3 (1-5/8) Ø 34.9 (1-3/8) Ø 22.2 (7/8)

Not increased Not increased

62~64

Ø 22.2 (7/8) Ø 44.5 (1-3/4) Ø 41.3 (1-5/8) Ø 25.4 (1)

Not increased Not increased

66~96

Ø 22.2 (7/8) Ø 53.98 (2-1/8) Ø 44.5 (1-3/4) Ø 25.4 (1)

Not increased Not increased

Pattern 3

HR1

48 k 48 k 48 k 48 k

1 2 3 4

• The maximum total capacity of indoor units is 56.4kW(192 kBtu/h).

Pattern 4

12 k 12 k 12 k 12 k

1 2 3 4

• The maximum total capacity of a branch pipe of HR unit is 14.1kW(48 kBtu/h).

HR1

Pattern 5

HR1

48 k 48 k

1 2

HR2

48 k 48 k

3 4

HR1

24 k 24 k 24 k

12 k 12 k

Pattern 6

12 345

Page 23

ENGLISH

Keep the 40 m (131 ft) distance from the first branch to the farthest indoor.

Pipe Connection Method between outdoor unit/indoor unit

h See Table 2 A : Refrigerant pipe diameter from outdoor unit to first branch E : Refrigerant pipe diameter for outdoor unit capacity

(Slave 1+ Slave 2+ Slave 3)

F : Refrigerant pipe diameter for outdoor unit capacity

(Slave 2+ Slave 3)

G : Refrigerant pipe diameter for outdoor unit capacity(Slave 3)

Level Difference

(Outdoor unit ÷ Outdoor unit)

5 m [16.4 ft]

Max length from first branch to

each outdoor unit (L1, L2, L3)

Less than 10 m [32.8 ft]

(equivalent length of piping 13 m

[42.7 ft])

h * : See Table 4

WARNING

Increased Pipe Diameter(table 2)

- When pipe length is 90 m [295 ft] or more from ODU to 1st branch

- When level difference is 50 m [164 ft] or more

Y branch

Method

Combination of Y

branch/header

Method

Header

Method

Max pipe

length

Outdoor Unit

Indoor Unit

Longest

pipe

length(L)

A+B+C+D+e ≤ 150 m

[492 ft]

(200 m [656 ft] :

Conditional application)*

A+B+b ≤ 150 m [492 ft] A+C+e ≤ 150 m [492 ft]

(200 m [656 ft] :

Conditional application)*

A+f ≤ 200 m

[656 ft]

Equivalent

pipe length

175 m [574 ft]

(225 m [738 ft] :

Conditional application)*

175 m [574 ft]

(225 m [738 ft] :

Conditional application)*

225 m

[738 ft]

Total pipe

length

1000 m [3281 ft] 1000 m [3281 ft]

1000 m

[3281 ft]

Max

difference

in height

Outdoor Unit

÷ Indoor Unit

Difference in

height(H)

110 m [361 ft] 110 m [361 ft] 110 m [361 ft]

Indoor Unit

÷ Indoor Unit

Difference in

height(h)

40 m [131 ft] 40 m [131 ft] 40 m [131 ft]

Longest pipe

length after

1st branch

Pipe

length(l)

40 m [131 ft]

(90 m [295 ft] :

Conditional application)*

40 m [131 ft]

(90 m [295 ft] :

Conditional application)*

40 m [131 ft]

(Table 1) Limit Pipe length

For Heat Pump And Heat Recovery System Installation

Pattern 7

HR1

1 2

48 k 48 k

• * : Serial connection of HR units : Capacity sum of indoor units ≤ 56.4 kW (192 kBtu/h)

Pattern 8

HR1

1 2

48 k 48 k

• * : Maximum indoor units per a branch are 8 indoor units

Indoor Unit Y Branch pipe

3 4 5 6

12 k 12 k 12 k 12 k

HR2

3 4

48 k 48 k

HR2

HR3

5 6

48 k 48 k

24 k724 k

Head Branch pipe

Master

E GF

Indoor

Unit

1st branch

h 40 m (131 ft)

l 40 m (131 ft)

Slave1

Refrigerant pipe diameter from outdoor unit to ﬁrst branch

Slave2

Slave3

Outdoor

Unit

• Pipe installation from outdoor units to HR units : 3 pipes(Low pressure Gas pipe, High pressure Gas pipe, Liquid pipe)

• Pipe installation from HR units to indoor units : 2 pipes(Gas pipe, Liquid pipe)

Low pressure Gas pipe

High pressure Gas pipe

Liquid pipe

HR1

Gas pipe

Liquid pipe

Indoor

Unit

1) under 40 m (131 ft)

5 m(16 ft)

Indoor

Y branch

Indoor

Unit

Keep the sum of indoor capacity under 56.4 kW(192 kBtu/h).

Unit

Keep the sum of indoor capacity under 56.4 kW(192 kBtu/h).

1) under 40 m (131 ft)

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

15 m(49 ft)

Page 24

ENGLISH

(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)

ODU

capacity

(hp)

Pipe diameter when pipe

length is < 90 m (295 ft)

(Standard)

Pipe diameter when pipe length is ≥ 90 m (295 ft)

Pipe diameter when height differential

(ODU÷IDU) is > 50 m (164 ft)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Ø 9.52 (3/8) Ø 19.05 (3/4) Ø 12.7 (1/2) Ø 22.2 (7/8) Ø 12.7 (1/2)

Not increased

Ø 9.52 (3/8) Ø 22.2 (7/8) Ø 12.7 (1/2) Ø 28.58 (1-1/8) Ø 12.7 (1/2)

Not increased

12~16

Ø 12.7 (1/2) Ø 28.58 (1-1/8) Ø 15.88 (5/8) Ø 34.9 (1-3/8) Ø 15.88 (5/8)

Not increased

18~22

Ø 15.88 (5/8) Ø 28.58 (1-1/8) Ø 19.05 (3/4) Ø 34.9 (1-3/8) Ø 19.05 (3/4)

Not increased

Ø 15.88 (5/8) Ø 34.9 (1-3/8) Ø 19.05 (3/4) Ø 41.3 (1-5/8) Ø 19.05 (3/4)

Not increased

26~34

Ø 19.05 (3/4) Ø 34.9 (1-3/8) Ø 22.2 (7/8) Ø 41.3 (1-5/8) Ø 22.2 (7/8)

Not increased

36~60

Ø 19.05 (3/4) Ø 41.3 (1-5/8) Ø 22.2 (7/8) Ø 44.5 (1-3/4) Ø 22.2 (7/8)

Not increased

62~64

Ø 22.2 (7/8) Ø 44.5 (1-3/4) Ø 25.4 (1) Ø 53.98 (2-1/8) Ø 25.4 (1)

Not increased

66~96

Ø 22.2 (7/8) Ø 53.98 (2-1/8) Ø 25.4 (1) Ø 53.98 (2-1/8) Ø 25.4 (1)

Not increased

Outdoor unit Connection

WARNING

• In case of pipe diameter B connected after first branch is bigger

than the main pipe diameter A, B should be of the same size with A. Ex) In case indoor unit combination ratio 120 % is connected to

70 kW outdoor unit.

1) Outdoor unit main pipe diameter A : Ø 34.9(1-3/8)) (Low pressure gas pipe), Ø 15.88(5/8)(liquid pipe), Ø 28.58(1-1/8)(High Pressure liquid pipe)

2) Pipe diameter B after first branch according to 120 % indoor unit combination(84 kW) : Ø 34.9(1-3/8) (Low pressure gas pipe), Ø 19.05(3/4)(liquid pipe), Ø 28.58(1-1/8)(High Pressure liquid pipe) Therefore, pipe diameter B connected after first branch would be Ø 34.9(1-3/8)(Low pressure gas pipe), Ø 15.88(5/8)(liquid pipe), Ø 28.58(1-1/8)(High Pressure liquid pipe) which is same with main pipe diameter.

[Example] Do not choose the main pipe diameter by downward indoor unit

total capacity but its outdoor unit model name. Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model name. EX) Where connecting the indoor units to the 22 HP (61.5 kW)

outdoor unit to 120 % of its system capacity (73.8 kW) and branching 7 k (2.1 kW) indoor unit at the 1st branch

Main pipe diameter(22 HP outdoor unit): Ø 28.58(1-1/8)(Low pressure gas pipe), Ø 15.88(5/8)(Liquid pipe), Ø 22.2(7/8)(High pressure gas pipe)

Pipe diameter between 1st and 2nd branch (71.7 kW indoor units): Ø 34.9(1-3/8)(Gas pipe) Ø 19.05(3/4)(Liquid pipe) in conformity with Downward indoor units.

Since the main pipe diameter of 22HP outdoor unit is Ø 28.58(1-1/8)(Low pressure gas pipe), Ø 15.88(5/8)(Liquid pipe), Ø 22.2(7/8) (High pressure gas pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.

Indoor Unit Connection

Indoor Unit connecting pipe from branch (a,b,c,d,e,f)

Indoor Unit capacity

[kW(Btu/h)]

Liquid pipe [mm(inch)]

Gas pipe [mm(inch)]

≤ 5.6(19,100)

Ø 6.35(1/4) Ø 12.7(1/2) < 16.0(54,600) Ø 9.52(3/8) Ø 15.88(5/8) < 22.4(76,400) Ø 9.52(3/8) Ø 19.05(3/4) < 28.0(95,900) Ø 9.52(3/8) Ø 22.2(7/8)

(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)

Downward indoor unit

total capacity [kW(Btu/h)]

Liquid pipe [mm(inch)]

Gas pipe

[mm(inch)]

≤ 5.6(19,100)

Ø 6.35(1/4) Ø 12.7(1/2)

< 16.0 (54,600) Ø 9.52(3/8) Ø 15.88(5/8)

≤ 22.4 (76,400)

Ø 9.52(3/8) Ø 19.05(3/4) < 33.6 (114,700) Ø 9.52(3/8) Ø 22.2(7/8) < 50.4 (172,000) Ø 12.7(1/2) Ø 28.58(1-1/8) < 67.2 (229,400) Ø 15.88(5/8) Ø 28.58(1-1/8)

< 72.8(248,500) Ø 15.88(5/8) Ø 34.9(1-3/8) < 100.8(344,000) Ø 19.05(3/4) Ø 34.9(1-3/8) < 173.6(592,500) Ø 19.05(3/4) Ø 41.3(1-5/8) < 184.8(630,700) Ø 22.2(7/8) Ø 44.5(1-3/4)

≤ 224.0(764,400)

Ø 22.2(7/8) Ø 53.98(2-1/8)

(Table 4) Conditional Application

WARNING

• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same size with A.

Ex) In case indoor unit combination ratio 120 % is connected to

24 HP(67.2 kW) outdoor unit.

1) Outdoor unit main pipe diameter A : Ø 34.9(1-3/8)(Gas pipe), Ø 15.88(5/8)(liquid pipe)

2) Pipe diameter B after first branch according to 120 % indoor unit combination(80.6 kW) : Ø 34.9(1-3/8)(gas pipe), Ø 19.05(3/4)(liquid pipe)

Therefore, pipe diameter B connected after first branch would be Ø 34.9(1-3/8)(gas pipe) / Ø 15.88(5/8)(liquid pipe) which is same with main pipe diameter.

Condition Example

Diameter of pipes between first branch and the last branch should be increased by one step, except pipe diameter B,C,D is same as Diameter A

40 m [131 ft] <

B+C+D+e

90 m [295 ft] ’B, C, D

Change a diameter

While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.

A+Bx2+Cx2+Dx2

+a+b+c+d+e

≤

1 000 m [3 281 ft]

Length of pipe from each indoor unit to the closest branch

a,b,c,d,e≤40 m

[131 ft]

Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)] - [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤40 m [131 ft]

(A+B+C+D+e)-

(A+a) ≤ 40 m

[131 ft]

• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.

Ø 6.35(1/4) ’ Ø 9.52(3/8), Ø 9.52(3/8) ’ Ø 12.7(1/2), Ø 12.7(1/2) ’ Ø 15.88(5/8), Ø 15.88(5/8) ’ Ø 19.05(3/4), Ø 19.05(3/4) ’ Ø 22.2(7/8), Ø 22.2(7/8) ’ Ø 25.4(1), Ø 25.4(1) ’ Ø 28.58(1-1/8), Ø 28.58(1-1/8) ’ Ø 31.8(1-1/4), Ø 31.8(1-1/4) ’ Ø 34.9(1-3/8), Ø 34.9(1-3/8) ’ Ø 38.1(1-1/2)

H 110 m [361 ft]

h 40 m [131 ft]

Indoor Unit

Page 25

ENGLISH

Pipe Connection Method/Precautions for Series connections between Outdoor units

- Separate Y branch joints are needed for series connections between outdoor units.

- Please refer to the below connection examples to install pipe connections between outdoor units.

Pipe connection between outdoor units (General Case)

The maximum pipe length after the ﬁrst branching between the outdoor units is 10 m [32.8 ft] or less

Pipes between outdoor units are 2 m [6.6 ft] or less

2 m [6.6 ft] or less

- If the distance between the outdoor units becomes more than 2 m [6.6 ft], apply Oil Traps between the gas pipes.

- If the outdoor unit is located lower than the main pipe, apply Oil Trap.

Pipes between outdoor units are 2 m [6.6 ft] or longer

Oil Trap

Oil Trap Oil Trap

2 m [6.6 ft] or less

2 m [6.6 ft] or less 2 m [6.6 ft] or less

0.2 m [0.66 ft]

2 m [6.6 ft] or longer

CAUTION

• Bending radius should be at least twice the diameter of the pipe.

• Bend pipe after 500 mm [19.7 inch] or more from branch(or header). Do not bend U type. It may affect performance or result in noise. If U type bending is required the R should be more than 200 mm [7.9 inch]

Toward indoor unit

Pipe inclination (2° or more)

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

- Apply Oil Trap as shown below when the length of the pipe between the outdoor units is more than 2 m [6.6 ft]. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

2 m

Toward indoor unit

2 m [6.6 ft]

0.2 m [0.66 ft] Oil Trap

(Example 2)

Examples of Wrong Pipe Connections

500mm [19.7 inch]

or more

500mm [19.7 inch]

or more

If the main pipe is higher than the outdoor units, oil is accumulated in the outdoor unit.

If there are differences in the height between the outdoor units, oil is accumulated in the lower outdoor unit.

Oil Trap

Page 26

ENGLISH

- When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

h ≤ 5 m

0.2 m [0.66 ft]

Toward indoor unit

Oil Trap

(Example 3)

h ≤ 5 m

Toward indoor unit

(Example 2)

Y branch

Ⓐ To Branch Piping or Indoor Unit Ⓑ To Outdoor Unit

• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)

• There is no limitation on the joint mounting configuration.

• If the diameter of the refrigerant piping selected by the procedures described is different from the size of the joint, the connecting section should be cut with a pipe cutter.

• Branch pipe should be insulated with the insulator in each kit.

Branch pipe Fitting

• When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches.

Header

Ⓐ To Outdoor Unit Ⓑ To Indoor Unit

• The indoor unit having larger capacity must be installed closer to Ⓐ than smaller one.

• If the diameter of the refrigerant piping selected by the procedures described is different from the size of the joint, the connecting section should be cut with a pipe cutter.

• When the number of pipes to be connected is smaller than the number of header branches, install a cap to the unconnected branches.

• Fit branch pipe lie in a horizontal plane.

Horizontal plane

View from point B in the direction of the arrow

Horizontal plane

Within +/- 10°

Viewed from point A in direction of arrow

Facing

downwards

Within ±3° Within ±3°

Facing

upwards

Tape (ﬁeld supply)

Insulator

(included with kit)

Liquid and gas pipe joints

Insulator for ﬁeld piping

Pinched pipe

Page 27

ENGLISH

• Header should be insulated with the insulator in each kit.

• Joints between branch and pipe should be sealed with the tape included in each kit.

• Any cap pipe should be insulated using the insulator provided with each kit and then taped as described above.

Y branch pipe

Models Gas pipe Liquid pipe

ARBLN01621

92927045RJA

I.D19.05

O.D15.88

I.D12.7

I.D15.88

I.D12.7

I.D15.88

I.D12.7

312

281

72927045RJA

I.D12.7

O.D9.52

I.D6.35

I.D9.52

I.D.9.52

I.D.6.35

I.D9.52

I.D.6.35

292

281

ARBLN03321

03927045RJA

416

371

I.D15.88

I.D19.05

I.D12.7

ID12.7I.D19.05I.D15.88I.D19.05I.D22.2

I.D22.2

O.D19.05

I.D22.2

I.D25.4

70 110

3 1 2

110

I.D28.58

I.D25.4 OD22.2

82927045RJA

I.D9.52

I.D12.7

53.6D.I25.9D.I

I.D9.52

I.D12.7

I.D6.35

I.D12.7

327

265

ARBLN07121

33927045RJA

390

435

I.D22.2

O.D22.2

I.D28.58

I.D31.8

O.D19.05

I.D28.58

120 120

I.D28.58

I.D22.2

I.D19.05

I.D15.88

I.D12.7

I.D19.05

I.D15.88

1 3

110

I.D34.9

I.D31.8 O.D28.58

13927045RJA

25.9D.I25.9D.I7.21D.O

I.D15.88 I.D19.05

I.D12.7

I.D19.05

I.D15.88I.D12.7

I.D19.05

O.D12.7I.D6.35

I.D15.88

371

416

110 70

3 2

ARBLN14521

80927045RJA

458 505

125

120 130

I.D19.05

I.D15.88

I.D12.7

I.D19.05

I.D22.2

I.D41.3 I.D38.1

I.D41.3

O.D34.9

I.D34.9

I.D22.2

I.D28.58

I.D28.58I.D38.1

I.D41.3

I.D34.9

I.D38.1

O.D22.2

O.D38.1

O.D15.88

O.D28.58

120

23927045RJA

371

420

O.D15.88 I.D9.52

I.D12.7

O.D12.7 I.D6.35

I.D9.52

I.D15.88 I.D19.05

I.D22.2

I.D19.05

I.D15.88

I.D12.7

I.D15.88

I.D19.05

I.D22.2

O.D19.05

110 110

2 3 3

ARBLN23220

90927045RJA

O.D.28.58

I.D.22.2

115

100

O.D15.88

I.D12.7

O.D.22.2

I.D.15.88I.D.19.05

120

O.D.38.1

I.D.34.9

I.D.28.58 O.D.44.48

175

89.35.D.I8.13D.I I.D.25.4

I.D.44.48

I.D38.1I.D41.3

I.D.44.48

ID34.9I.D41.3

I.D.53.98

134

3 3

460 530

01927045RJA

O.D.19.05 I.D.12.7

I.D.15.88

O.D12.7 I.D6.35

I.D9.52

110 110

I.D25.4 I.D22.2

I.D.19.05

I.D.19.05I.D.22.2

I.D.25.4

I.D.22.2

346 379

3 32

[Unit:mm(inch)]

Header

Models Gas pipe Liquid pipe

4 branch

ARBL054

120

150

360

120

ID15.88

ID12.7

ID15.88

ID19.05

120(4-23/32)

360(14-5/32)

ID9.52(3/8)

ID9.52(3/8)ID9.52(3/8)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

150 (5-29/32)

120 (4-23/32)

7 branch

ARBL057

540

120

150

120

ID15.88

ID12.7

ID15.88

ID12.7

ID15.88

ID19.05

540(21-1/4)

ID9.52(3/8)

150 (5-29/32)

120 (4-23/32)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

4 branch

ARBL104

120

150

400

160

ID15.88

ID12.7

ID19.05

ID15.88

ID22.2

ID28.58ID25.4

ID9.52(3/8)

150 (5-29/32)

120(4-23/32)

120 (4-23/32)

360(14-5/32)

ID9.52(3/8)

ID9.52(3/8)ID9.52(3/8)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

7 branch

ARBL107

120

150

160

580

ID19.05

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

ID9.52(3/8)

120 (4-23/32)

700(27-9/16)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID9.52(3/8)ID9.52(3/8)

ID6.35(1/4)ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)ID12.7(1/2)

150 (5-29/32)

ID9.52(3/8)

10 branch

ARBL1010

120

150

160

760

ID19.05

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

ID9.52(3/8)

120 (4-23/32)

120(4-23/32)

720(28-11/32)

ID6.35(1/4)

ID9.52(3/8)

ID9.52ID9.52 (3/8)(3/8)

ID9.52 (3/8)

ID6.35(1/4)

ID12.7(1/2)

ID9.52(3/8)

150 (5-29/32)

ID9.52(3/8)

10 branch

ARBL2010

120

150

182

775

ID19.05

ID15.88

ID12.7

ID28.58

ID31.8 ID34.9

ID9.52(3/8)

120 (4-23/32)

ID9.52(3/8)

ID6.35(1/4)

ID9.52 (3/8)

107(4-7/32)

60*9=540(21-1/2)

700(27-9/16)

ID6.35(1/4)

ID9.52(3/8)

ID19.05(3/4)

ID15.88(5/8)

ID9.52 (3/8)

ID6.35 (1/4)

ID9.52 (3/8)

ID6.35 (1/4)

150 (5-29/32)

ID9.52(3/8)

Insulate the header using the insulation material attached to the branch pipe kit as shown in the ﬁgure.

Tape

Insulator

Insulator of ﬁeld pipe

Insulator for cap pipe

Cap pipe

Tape

Page 28

ENGLISH

This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.

Vacuum mode setting method

SW01C (Ɨ: Conﬁrm / Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP switch 01

7 Segment

SW01D (reset)

SW03C (ȯ: forward)

- Ensure that the branch pipes are attached vertically.

Slave

Master

Header

Slave

Master

Slave

Master

Slave

Master

Vertical Distribution

The others

Vacuum mode off method

CAUTION

ODU operation stops during vacuum mode. Compressor can't operate.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“SVC” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Se3” Push the ‘●’ button

Start the vacuum mode : “VACC”

ODU Valve open

ODU EEV open

IDU EEV open

HR unit valve open, SC EEV open

DIP switch off and push the reset button on Master unit PCB

Slave

Master

Slave

Master

1st

Main pipe

Distribution

2nd

3rd

Main pipe

Distribution

Slave

Master

1st

3rd

3rd main pipe distribution

2nd

Horizontal Distribution

Vacuum ModeDistribution Method

Page 29

ENGLISH

Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa

(38.7 kgf/cm

). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas pipe and high pressure gas pipe)

The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitrogen gas pressurization.

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure

Gas Pipe

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure

Gas Pipe

Nitrogen Gas Cylinder

Slave 1 outdoor unit Master outdoor unit

Indoor

Unit

Liquid Pipe

HR unit

Gas Pipe

Leak Test and Vacuum drying

When inserting nitrogen gas of high pressure, it must be used with regulator.

Series Installation (Heat Pump)

Series Installation (Heat Recovery)

Liquid Pipe

No use (closed)

Gas Pipe

Liquid Pipe

No use (closed)

Gas Pipe

Slave 1 outdoor unit Master outdoor unit

Nitrogen Gas Cylinder

Indoor

Unit

Liquid Pipe

Gas Pipe

When inserting nitrogen gas of high pressure, it must be used with regulator.

WARNING

Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

CAUTION

To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be at higher position than the bottom when you pressurize the system.

Usually the cylinder is used in a vertical standing position.

Vacuum Vacuum drying should be made from the service port provided on the outdoor

unit’s service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.) * Never perform air purging using refrigerant.

• Vacuum drying: Use a vacuum pump that can evacuate to -100.7 kPa (-14.6 psi, 5 Torr, -755 mmHg).

- Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system to -100.7 kPa(-14.6 psi). After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system may contain moisture or leak.

- Following should be executed if there is a possibility of moisture remaining inside the pipe. (Rainwater may enter the pipe during work in the rainy season or over a long period of time) After evacuating the system for 2 hrs, give pressure to the system to 0.05 MPa(7.3 psi) (vacuum break) with nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7 kPa (-14.6 psi)(vacuum drying). If the system cannot be evacuated to

-100.7 kPa(-14.6 psi) within 2 hrs, repeat the steps of vacuum break and its drying. Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.

NOTE

If the ambient temperature differs between the time when pressure is applied and when the pressure drop is checked, apply the following correction factor

There is a pressure change of approximately 0.01 Mpa(1.5 psi) for each

33.8 °F (1°C) of temperature difference. Correction= (Temp. at the time of pressurization – Temp. at the time of

check) X 0.1 For example: Temperature at the time of pressurization

3.8 MPa(551 psi) is 80.6 °F (27 °C) 24 hour later: 3.73 MPa(541 psi), 68 °F (20 °C) In this case the pressure drop of

0.07 MPa(10psi) is because of temperature drop And hence there is no leakage in pipe occurred.

Series Installation (Heat Pump)

Scale Use a graviometer. (One that can measure down to 0.1 kg (0.22 lbs)). If you are unable to prepare such a high-precision gravimeter you may use a charge cylinder.

Indoor unit

Liquid pipe

Gas pipe

Liquid pipe

No use (closed)

Liquid side

Gas side

Slave 1 outdoor unit Master outdoor unit

Page 30

ENGLISH

NOTE

Always add an appropriate amount of refrigerant. (For the refrigerant additional charge) Too much or too little refrigerant will cause trouble. To use the Vacuum Mode (If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)

WARNING

Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

WARNING

When installing and moving the air conditioner to another site, recharge after perfect evacuation.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

Series Installation (Heat Recovery)

Scale Use a graviometer. (One that can measure down to 0.1 kg (0.22 lbs)). If you are unable to prepare such a high-precision gravimeter you may use a charge cylinder.

Vacuum pump

Indoor unit

Slave 1 outdoor unit Master outdoor unit

Liquid pipe

High Pressure

Gas pipe

High Pressure

Gas pipe

Liquid pipe

Low Pressure

Gas pipe

Low Pressure

Gas pipe

Liquid side

Gas side

HR unit

For Heat Recovery System Installation

Ⓐ Manifold Gauge Ⓑ Low pressure side Handle Ⓒ High pressure side Handle

For Heat Pump System Installation

Ⓐ Manifold Gauge Ⓑ Low Pressure Side Handle Ⓒ High Pressure Side Handle

WARNING

• Pipe to be vacuumed : gas pipe, liquid pipe (In case of Heat Recovery system, pipe to be vacuumed : High pressure gas pipe, Low pressure gas pipe, Liquid pipe)

• If the refrigerant amount is not exact, it may not operate properly.

• If additionally bottled refrigerant amount is over 10 %, condenser burst or insufficient indoor unit performance may be caused.

Refrigerant charging

Liquid Pipe

Not used

(keep closed)

Gas Pipe

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure Gas Pipe

Page 31

ENGLISH

The amount of Refrigerant

The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of indoor unit.

Include only for Heat Recovery system

Total liquid pipe : Ø 25.4 mm (1.0 inch)

Additional charge(kg)

Total liquid pipe : Ø 22.2 mm (7/8 inch)

Total liquid pipe : Ø 19.05 mm (3/4 inch)

Total liquid pipe : Ø 15.88 mm (5/8 inch)

Total liquid pipe : Ø 12.7 mm (1/2 inch)

Total liquid pipe : Ø 9.52 mm (3/8 inch)

Total liquid pipe : Ø 6.35 mm (1/4 inch)

Number of installed HR units

CF value of indoor unit

× 0.480 kg/m (0.323 lbs/ft)

× 0.354 kg/m (0.238 lbs/ft)

× 0.266 kg/m (0.179 lbs/ft)

× 0.173 kg/m (0.116 lbs/ft)

× 0.118 kg/m (0.079 lbs/ft)

× 0.061 kg/m (0.041 lbs/ft)

× 0.022 kg/m (0.015 lbs/ft)

× 0.5 kg/EA (1.1 lbs/EA)

Amount refrigerant of Indoor units Example) 4Way Ceiling Cassette 14.5 kW -1ea, Ceiling concealed

Duct 7.3 kW-2ea, Wall Mounted 2.3 kW-4ea CF = [0.64 kg (1.411 lbs)×1EA] + [0.26 kg (0.573

lbs)×2EA] + [0.26 kg (0.529 lbs)×4EA] = 2.12 kg (4.67 lbs)

WARNING

• Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety.

If the above equation can not be satisfied, then follow the following steps.

• Selection of air conditioning system: select one of the next

- Installation of effective opening part

- Reconfirmation of Outdoor Unit capacity and piping length

- Reduction of the amount of refrigerant

- Installation of 2 or more security device (alarm for gas leakage)

• Change Indoor Unit type :

installation position should be over 2 m (6.6 ft) from the floor (Wall mounted type ’ Cassette type)

• Adoption of ventilation system : choose ordinary ventilation system or building ventilation

system

• Limitation in piping work : Prepare for earthquake and thermal stress

Volume of the room at which Indoor Unit of

the least capacity is installed

Total amount of refrigerant in the system

≤0.44 kg/m

(0.028 lbs/ft3)

Attach the additional refrigerant table of IDU.

Bad example

• Do not insulate gas or low pressure pipe and liquid or highpressure pipe together.

• Be sure to fully insulate connecting portion.

Ⓐ

These parts are not insulated.

Ⓐ Liquid pipe Ⓑ Gas pipe ⓒ Power lines ⓓ

Finishing tape

ⓔ

Insulating material

ⓕ

Communication lines

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.

Ⓐ Heat insulation material Ⓑ Pipe Ⓒ Outer covering(Wind the connection part and cutting part of heat

insulation material with a finishing tape.)

Heat insulation

material

Adhesive + Heat - resistant

polyethylene foam + Adhesive tape

Outer

covering

Indoor Vinyl tape

Floor

exposed

Water-proof hemp cloth +

Bronze asphalt

Outdoor

Water-proof hemp cloth +

Zinc plate + Oily paint

NOTE

When using polyethylene cover as covering material, asphalt roofing shall not be required.

Thermal insulation of refrigerant piping

Good example

Ⓐ Liquid pipe Ⓑ Gas pipe ⓒ Power lines ⓓ

Insulating material

ⓔ

Communication lines

Separation

Power lines

Page 32

Master Slave

Master Slave1 Slave2

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Multi-Core Cable

Master Slave

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Master Slave1 Slave2 Slave3

Indoor

Unit

Indoor

Unit

Remote control

Indoor

Unit

Indoor

Unit

ENGLISH

1 m

(3.28 ft)

1 m

(3.28 ft)

Penetrations

Ⓐ Sleeve Ⓑ Heat insulating material Ⓒ Lagging Ⓓ Caulking material Ⓔ Band Ⓕ Waterproofing layer Ⓖ Sleeve with edge Ⓗ Lagging material Ⓘ Mortar or other incombustible caulking Ⓙ Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so that the insulation material will not be caved in. For this part, use incombustible materials for both insulation and covering. (Vinyl covering should not be used.)

Inner wall (concealed) Outer wall Outer wall (exposed)

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

Page 33

ENGLISH

Master Slave1 Slave2

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

Remote control

Indoor

Unit

CAUTION

When the 400 volt power supply is applied to “N” phase by mistake, check damaged parts in control box and replace them.

Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal block.

Round pressure terminal

Power cable

When none are available, follow the instructions below.

- Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.)

- When connecting cable which is the same thickness, do as shown in the figure below.

- For wiring, use the designated power cable and connect firmly, then secure to prevent outside pressure being exerted on the terminal block.

- Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will strip the head and make proper tighterning impossible.

- Over-tightening the terminal screws may break them.

CAUTION

• Use the 2-core shielded wires for communication cables. Never use them together with power cables.

• The conductive shielding layer of cable should be grounded to the metal part of both units.

• Never use multi-core cable

• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never install a phase leading capacitor.

• Make sure that the power unbalance ratio is not greater than 2 %. If it is greater the units lifespan will be reduced.

Caution

- Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.

Install the Outdoor Unit communication cable away from the power

source wiring so that it is not affected by electric noise from the power source. (Do not run it through the same conduit.)

- Be sure to provide designated grounding work to Outdoor Unit.

- Give some allowance to wiring for electrical part box of Indoor and

Outdoor Units, because the box is sometimes removed at the time of service work.

- Never connect the main power source to terminal block of

communication cable. If connected, electrical parts will be burnt out.

- Use the 2-core shielded wires for communication cable.( mark in

the figure below) If communication cable of different systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erroneous operations. ( mark in the figure below)

- Only the communication cable specified should be connected to the

terminal block for Outdoor Unit communication.

CAUTION

Be sure to correct the outdoor unit to earth. Do not connect ground wire to any gas pipe, liquid pipe, lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

WARNING

Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual. If power supply circuit has a lack of capacity or electric work deficiency, it may cause an electric shock or fire.

ELECTRICAL WIRING

2-core shielded cables

Remote control

Indoor

Unit

Indoor

Unit

1Unit

Master

2Unit

Slave1

3Unit

Slave2

4Unit

Slave3

Master Slave1 Slave2 Slave3

Indoor

Unit

Indoor

Unit

Page 34

ENGLISH

UXA

UXB

WARNING

The temperature sensor for outdoor air should not be exposed to direct sunlight.

- Provide an appropriate cover to intercept direct sunlight.

NOTE

• The figures are based on assumed length of parallel cabling up to 100 m [328 ft]. For length in excess of 100 m [328 ft] the figures will have to be recalculated in direct proportion to the additional length of cable involved.

• If the power supply waveform continues to exhibit some distortion the recommended spacing in the table should be increased.

- If the cable are laid inside conduits then the following point must also be taken into account when grouping various cable together for introduction into the conduits

- Power cable(including power supply to air conditioner) and communication cables must not be laid inside the same

- In the same way, when grouping the power wires and communication cables should not be bunched together.

CAUTION

If apparatus is not properly earthed then there is always a risk of electric shock, the grounding of the apparatus must be carried out by a qualified person.

CAUTION

In case of using the shielded wires, it should be grounded.

Separation of communication and power cables

- If communication and power cables are installed alongside each other then there is a strong likelihood of operational faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling. The tables below indicates our recommendation as to appropriate spacing of communication and power cables where these are to be run side by side

Communication and Power Cables

Communication cable

- Types : shielded wires

- Cross section : 1.0 ~ 1.5 mm

(1.55 × 10-3~ 2.32 × 10-3in2)

- Maximum allowable temperature: 60 °C (140 °F)

- Maximum allowable cable length: under 1,000 m (3,281 ft)

Remote control cable

- Types : 3-core cables

Central control cable

Product type Cable type Diameter

ACP&AC Manager

2-core wires (shielded)

1.0 ~ 1.5 mm

(1.55 × 10-3~

2.32 × 10-3in2)

AC Smart

2-core wires (shielded)

1.0 ~ 1.5 mm

(1.55 × 10-3~

2.32 × 10-3in2)

Simple central controller

4-core wires (shielded)

1.0 ~ 1.5 mm

(1.55 × 10-3~

2.32 × 10-3in2)

AC Ez

4-core wires (shielded)

1.0 ~ 1.5 mm

(1.55 × 10-3~

2.32 × 10-3in2)

Current capacity of power cable Spacing

100 V or more

10 A 300 mm (11-13/16 inch) 50 A 500 mm (19-11/16 inch)

100 A 1,000 mm (39-3/8 inch)

Exceed 100 A 1,500 mm (59-1/16 inch)

Control box and connecting position of wiring

- Remove all of the screws at front panel and remove the panel by pulling it forward.

- Connect communication cable between main and sub outdoor unit through the terminal block.

- Connect communication cables between outdoor unit and indoor units through the terminal block.

- When the central control system is connected to the outdoor unit, a dedicated PCB must be connected between them.

- When connecting communication cable between outdoor unit and indoor units with shielded cable, connect the shield ground to the earth screw.

Front Panel

Main Board

External Board

Main power line

terminal block

(Take care of the phase

sequence of 3-phases

4-wires power system)

Page 35

ENGLISH

CAUTION

• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric shock.

• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction of unit or fire.

WARNING

• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.

• Make sure to use specified cables for connections so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause heating or fire.

• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.

Ground wire

1 The power wire Between the master outdoor unit and slave1

outdoor unit - minimum : 6 mm2[9.3 × 10-3inch2]

2 The power wire Between the slave1 outdoor unit and slave2

outdoor unit - minimum : 4 mm2[6.2 × 10-3inch2]

3 The power wire Between the slave2 outdoor unit and slave3

outdoor unit - minimum : 2.5 mm2[3.875 × 10-3inch2]

h The above standard is CV wire standard. h Please use the 3-phases 4-wires quadrupole Leakage circuit breaker

of circuit breaker.

The thickness of Minimum wire (mm2[ inch2])

Leakage

circuit breaker

(4P ELCB)

Main power

wire

Branch wire Ground wire

1 Unit

2.5~16

[3.875 × 10

-3

~2.48 × 10-2]

2.5~4

[3.875 × 10

-3

~6.2 × 10-3]

Below 20~60 A

100 mA

0.1 seconds

2 Unit

16~50

[2.48 × 10

-2

~7.75 × 10-2]

4~10

[6.2 × 10

-3

~1.55 × 10-2]

Below 75~150 A

100 mA

0.1 seconds

3 Unit

50~95

[7.75 × 10

-2

~1.4725 × 10-1]

[1.55 × 10-2]

Below 150~200 A

100 mA

0.1 seconds

4 Unit

95~120

[1.4725 × 10

-1

~1.86 × 10-1]

10~16

[1.55 × 10

-2

~2.48 × 10-2]

Below 200~250 A

100 mA

0.1 seconds

(1) European / International Technical Standard setting the limits for

voltage changes, voltage fluctuations and flicker in public lowvoltage supply systems for equipment with rated current ≤75 A.

(2) European / International Technical Standard setting the limits for

harmonic currents produced by equipment connected to public lowvoltage systems with input current >16 A and ≤75 A per phase.

Standard combination of

outdoor units

Zmax (Ω)

Minimum Ssc Value

(kVA)

ARUM080LTE5 - 2776

ARUM100LTE5 - 3828

ARUM120LTE5 - 3828

ARUM140LTE5 - 6339

ARUM160LTE5 - 6339

ARUM180LTE5 - 6339

ARUM200LTE5 - 6339

ARUM220LTE5 - 6339

ARUM240LTE5 - 8144

ARUM260LTE5 - 8144

Outdoor unit Current(max)

Minimum cross-sectional area of power

supply (mm^2) ARUM080LTE5 18.2 2.5 ARUM100LTE5 25.1 4 ARUM120LTE5 25.5 4 ARUM140LTE5 26.9 4 ARUM160LTE5 27.3 4 ARUM180LTE5 45.5 10 ARUM200LTE5 47.3 10 ARUM220LTE5 48 10 ARUM240LTE5 23.6 10 ARUM260LTE5 54.5 10

Field Wiring

Single outdoor unit

R S T N

Switch

Fuse

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

In case of Heat

Recovery System

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

Pull Box (Installer option)

HR unit

Outdoor

Power supply

(3 Ø 4wires)

Indoor

Power supply

(1 Ø 2wires)

(Main Switch)

Frequency

Voltage range(V)

Outdoor Indoor 60 Hz 380 V 220 V 50 Hz 380-415 V 220-240 V

Point for attention regarding quality of the public electric power supply

This equipment complies with respectively:

EN/IEC 61000-3-11 (1) provided that the system impedance Zsys is

less than or equal to Zmax and

EN/IEC 61000-3-12 (2) provided that the short-circuit power Ssc is greater than or equal to the minimum Ssc alue at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with respectively:

Zsys less than or equal to Zmax and

Ssc greater than or equal to the minimum Ssc value.

Wiring of main power supply and equipment capacity

- Use a separate power supply for the Outdoor Unit and Indoor Unit.

- Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.

- The cable size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop more than 10 %.

- Specific wiring requirements should adhere to the wiring regulations of the region.

- Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene sheathed flexible cord.

- Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

Page 36

ENGLISH

HR unit

Master Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

34 34 34

In case of Heat Recovery System

Between Indoor and Master Outdoor unit

The GND terminal at the main PCB is a ‘-’ terminal for dry contact, it is not the point to make ground connection.

WARNING

• Indoor Unit ground wires are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase may break the compressor and other parts.

Series outdoor units

When the power source is connected

In series between the units.

R S T N

Switch

Fuse

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

[Slave1] [Slave2] [Slave3]

Pull Box (Installer option)

HR unit

Outdoor

Power supply

(3 Ø 4wires)

Indoor

Power supply

(1 Ø 2wires)

(Main Switch)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

In case of Heat

Recovery System

Frequency

Voltage range(V)

Outdoor Indoor 60 Hz 380 V 220 V 50 Hz 380-415 V 220-240 V

Example) Connection of transmission wire

[BUS type] [STAR type]

When the power source is supplied to Each outdoor unit individually.

R S T N

Switch

Fuse

Communication Line

(2 Wires Cable)

Power Line

(4 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

[Slave1] [Slave2] [Slave3]

R S T N

Switch

Fuse

R S T N

Switch

Fuse

R S T N

Switch

Fuse

Pull Box (Installer option)

HR unit

Outdoor Power supply (3 Ø 4wires)

Indoor

Power supply

(1 Ø 2wires)

(Main Switch)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

In case of Heat

Recovery System

Frequency

Voltage range(V)

Outdoor Indoor 60 Hz 380 V 220 V 50 Hz 380-415 V 220-240 V

Between Indoor and Master Outdoor unit The communication cables between indoor unit and master outdoor unit are possible to connect with BUS type or STAR type.

The GND terminal at the main PCB is a ‘-’ terminal for dry contact. It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units are matched.(A-A, B-B)

WARNING

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.

WARNING

When the total capacity is over than as follow, the power source do not use in series between the units.

The First terminal block could be burnt out.

- Connection of communication cable must be installed like below figure between indoor unit to outdoor unit.

- Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

34 34 34

HR unit

In case of Heat Recovery System

Master

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Master Outdoor unit

Slave1 Outdoor Unit

Slave2 Outdoor Unit

Slave3 Outdoor Unit

Page 37

ENGLISH

CAUTION

It should be wiring power cables or communication cables to avoid interference with the oil level sensor. Otherwise, That oil level sensor would be operated abnormally.

Example) Connection of power and communication cable (UXA)

Gap : Over

50mm(1.97’’)

When connecting

Main power lines

/ Ground wire from left side

When connecting

Communication wires

/ Ground wire from left side

Main power terminal block

Ground wire

Main power

terminal block

Insulation sleeves

attachments

Ground wire

Ground wire ODU-IDU

Communication cable

ODU-ODU Communication cable

Bottom Side

Main power terminal block

Ground wire

When connecting Communication wires / Ground wire from front guide panel

When connecting Main power lines / Ground wire from front guide panel

Gap : Over 50mm(1.97’’)

Front Side

Fix firmly with cable tie or

clamp cord not to be displaced

Main power line

connection

Communication/Ground

wire connection

Example) Connection of power and communication cable (UXB)

Main power

terminal block

Ground wire

Gap : Over

50mm(1.97’’)

When connecting

Main power lines

/ Ground wire from left side

When connecting

Communication wires

/ Ground wire from left side

Bottom Side

CAUTION

It should be wiring power cables or communication cables to avoid interference with the oil level sensor. Otherwise, That oil level sensor would be operated abnormally.

Checking the setting of outdoor units

Checking according to DIP switch setting

- You can check the setting values of the Master outdoor unit from the 7 segment LED. The DIP switch setting should be changed when the power is OFF.

Checking the initial display The number is sequentially appeared at the 7 segment in 5 seconds

after applying the power. This number represents the setting condition.

[Main Board]

DIP switch

7 segment

SW01C (Automatic Addressing Setting)

Main power

terminal block

Insulation sleeves

attachments

Ground wire

ODU-IDU Communication cable

ODU-ODU Communication cable

Main power

terminal block

Ground wire

When connecting

Communication wires

/ Ground wire from

front guide panel

When connecting Main power lines

/ Ground wire from

front guide panel

Gap : Over

50mm(1.97’’)

Front Side

Fix firmly with cable tie

or clamp cord not to be

displaced

Main power line

connection

Communication/Ground

wire connection

Page 38

ENGLISH

Quick control Setting In the factory setting, main PCB DIP switch setting is all “OFF”.

- Check and make sure that all the indoor unit model name are ARNU******4.

- Change the main PCB DIP switch No. 3 “OFF → ON” like below picture.

- Push the reset button.

7 segmentDIP Switch

Reset button

• Initial display order

• Example) ARUM620LTE5 62hp 380V Heat Pump System (Master unit: 18 hp, Slave 1: 16 hp, Slave 2: 14 hp, Slave 3: 14 hp)

Order No Mean

①

8~24 Master unit capacity

②

10~24 Slave 1 unit capacity

③

10~24 Slave 2 unit capacity

④

10~24 Slave 3 unit capacity

⑤

8~96 Total capacity

⑥

3 Heat Pump (Factory Setting)

⑦

38 380V model 46 460V model 22 220V model

⑧

40 Full function

① ② ③ ④ ⑤ ⑥ ⑦ ⑧

18 16 14 14 62 3 38 40

Master/Slave DIP switch setting

• Master Unit

h Heat Recovery installation

① Turn on the DIP switch No 4.

② The factory setting display is appeared “HP”. ③ Change “HP” into “HR” display pushing ▶ button and then push

confirm button.

④ Turn off the DIP switch No 4. and Push reset button to restart the

system. (If you turn on the DIP switch No 4, you can make sure “HR” or “HP” display later.)

• Slave Unit

DIP switch

setting

ODU Setting

Slave 1

Slave 2

Slave 3

DIP switch

setting

ODU Setting

Heat Pump System

(Factory Setting)

DIP switch

setting

ODU Setting

Setting Heat pump system or Heat Recovery system

(Installer Setting)

Setting For Heat Recovery Unit (Refer Only Heat Recovery Installation) [Heat Recovery (HR) Unit Board]

Switch for setup of HR Unit

Main function of SW02M

1 Selection of the method for addressing valves of an HR unit

(Auto/Manual)

2 Setting the zoning control

* Zoning control

This function is used to connect multiple indoor units to one pipe.

S/W

Selection

No.1

Method for addressing valves of an HR unit (Auto/Manual)

No.2 Model of HR unit

No.3 Model of HR unit

No.4 Model of HR unit

No.5 Valve group setting

No.6 Valve group setting

No.7

Use only in factory production (preset to “OFF”)

Zoning setting (“ON”)

No.8

Use only in factory production (preset to “OFF”)

SW02M

Auto Manual

Switch No.1 OnSwitch No.1 Off

DIP switch setting

Normal control

Zoning control

Turn the DIP switch of the zoning branch on. Ex) Branch 1,2 are zoning control.

#4 valve housing

#1 valve housing

7 segment

SW05M

SW02M

(DIP switch for setup of

The function of HR unit)

SW03M

SW04M

SW01M

SW01M/SW03M/SW04M (Switch for manual valve addressing)

Page 39

ENGLISH

3 Selection of the model of HR unit

* Each model is shipped with the switches No.2 and No.3 pre-adjusted

as above in the factory.

(For 2 branches)

PRHR022

PRHR022A

(For 3 branches)

PRHR032

PRHR032A

(For 4 branches)

PRHR042

PRHR042A

Initial

Setting

1 branches Connected

2 branches Connected

3 branches Connected

4 branches Connected

4 Setting the Valve Group.

WARNING

• If you want to use a PRHR032 or PRHR032A for 2 branches HR unit after closing the 3rd pipes, set the DIP switch for 2 branches HR unit.

• If you want to use a PRHR042 or PRHR042A for 3 branches HR unit after closing the 4th pipes, set the DIP switch for 3 branches HR unit.

• If you want to use a PRHR042 or PRHR042A for 2 branches HR unit after closing the 3rd and 4th pipes, set the DIP switch for 2 branches HR unit.

• The unused port must be closed with a copper cap, not with a plastic cap.

No.1, 2 Valve

No.3, 4 Valve

Control

No.3, 4 Valve

Control

DIP switch setting

No.2, 3 Valve

Control

No.1, 2 Valve

Control

Not control

Example

Large capacity indoor unit

Indoor Unit Indoor Unit

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit Indoor Unit Large capacity indoor unit

Indoor Unit Indoor Unit Indoor Unit Indoor Unit

NOTE

If the large capacity indoor units are installed, below Y branch pipe should be used.

Models Low pressure Gas pipe High pressure Gas pipeLiquid pipe

ARBLB03321

413(16-1/4)

390(15-11/32)

I.D19.05(3/4)

I.D15.88(5/8)

I.D12.7(1/2)

I.D12.7

(1/2)

(2-29/32)

70(2-3/4)

I.D15.88(5/8)

I.D25.4(1)

O.D25.4(1)

80(3-5/32)

110(4-11/32) 110(4-11/32)

332(13-1/16)

321(12-5/8)

(3-9/32)

I.D19.05(3/4)

O.D19.05(3/4)

3 2

1 2

O.D15.88(5/8)

444(17-15/32)

421(16-9/16)

(3-25/32)

I.D15.88

(5/8)

I.D22.2(7/8)

O.D15.88(5/8)

I.D6.35(1/4)

I.D28.58(1-1/8)

I.D19.05(3/4)

I.D9.52(3/8)

Y branch pipe

(Unit: mm [inch])

SW05M (Rotary S/W for addressing HR unit)

Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with

sequentially increasing numbers starting from '0'.

Ex) Installation of 3 HR units

S/W No. Setup

No.1 Manual addressing of valve #1 No.2 Manual addressing of valve #2 No.3 Manual addressing of valve #3 No.4 Manual addressing of valve #4

SW03M

Increase in the digit of 10 of valve address

SW04M

Increase in the last digit of valve address

SW01M

SW03M

SW04M

2 Zoning setting

- Set the address of the valve of the HR unit to the central control address of the connected indoor unit.

- SW01M : selection of the valve to address SW03M : increase in the digit of 10 of valve address SW04M : increase in the last digit of valve address SW05M :Rotary S/W

- Prerequisite for manual valve addressing : central control address of each indoor unit must be preset differently at its wired remote control.

SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)

1 Normal setting (Non-Zoning setting)

- Set the address of the valve of the HR unit to the central control address of the connected indoor unit.

- SW01M: selection of the valve to address SW03M: increase in the digit of 10 of valve address SW04M: increase in the last digit of valve address

- Prerequisite for manual valve addressing : central control address of each indoor unit must be preset differently at its wired remote control.

* Setting the Valve Group

This function is used to connect one indoor unit to two pipes. (Large capacity indoor unit over 56 kBtu must be connected to two pipes.)

AB AB AB

Page 40

ENGLISH

S/W No. Setup

No.1 Manual addressing of valve #1 No.2 Manual addressing of valve #2 No.3 Manual addressing of valve #3 No.4 Manual addressing of valve #4

SW03M

Increase in the digit of 10 of valve address

SW04M Increase in the last digit of valve address

SW05M Manual addressing of zoning indoor units

SW01M

SW03M

SW04M SW05M

The Procedure of Automatic Addressing

CAUTION

• In replacement of the indoor unit PCB, always perform Automatic addressing setting again (At that time, please check about using Independent power module to any indoor unit.)

• If power supply is not applied to the indoor unit, operation error occur.

• Automatic Addressing has to be performed after more than 3 minutes to improve indoor unit communition when initial power is supplied.

• Please be sure that all the DIP switch (1~7) of master outdoor unit is OFF before Automatic Addressing setting

Automatic Addressing

The address of indoor units would be set by Automatic Addressing

- Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units)

- Press RED button of the outdoor units for 5 seconds. (SW01C)

- A “88” is indicated on 7 segment LED of the outdoor unit PCB.

- For completing addressing, 2~7 minutes are required depending on numbers of connected indoor units

Numbers of connected indoor units whose addressing is completed are indicated for 30 seconds on 7 segment LED of the outdoor unit PCB

- After completing addressing, address of each indoor unit is indicated on the wired remote control display window. (CH01, CH02, CH03, ……, CH06 : Indicated as numbers of connected indoor units)

[Main Board]

DIP switch

7 segment

Power On

Waiting 3 minutes

Press RED Button for 5 s

(SW01C)

7 segment LED = 88

Don’t press RED Button

(SW01C)

Waiting about 2~7 minutes

7 segment LED

= 88

YES

Automatic Addressing process start

• Automatic addressing process end Numbers of indoor unit connected are indicated for 30seconds on 7 segment LED after completing process

NO Check the connections

Indoor address number is displayed on wired remote controller or indoor unit display window. It is not an error message, will disappeared when on/off button is pressed on remote controller ex) Display of 01, 02, ..., 15 means connection of 15 indoor units

and Automatic addressing is completed normally.

of communication cable

SW01C (Automatic Addressing Setting)

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Automatic pipe detection

1 Turn No.1 of DIP s/w SW02M of HR unit PCB off. 2 Confirm that the setting of No.2, 3 of SW02M corresponds with the

Type of the valve connection.

3 Reset the power of HR unit PCB 4 Master Out door unit PCB DIP switch on : No.5 5 Select the mode using ‘▶’, ‘◀’ Button : “Idu” Push the ‘●’ button 6 Select the “Id 5” function using ‘▶’, ‘◀’ Button :“Ath” or “”Atc”

Push the ‘●’ button. Outdoor temperature is over 15°C(59°F) : “Atc” Using (If it fail, use “Ath”) Outdoor temperature is below 15°C(59°F) : “Ath” Using (If it fail, use “Atc”)

7 Select the mode using ‘▶’, ‘◀’ Button : “Idu” Push the ‘●’ button 8 Select the “Id 6” function using ‘▶’, ‘◀’ Button :“StA” Push the

‘●’ button

9 System is operated after “88” is displayed on 7 segment of the

outdoor unit main PCB.

10 Pipe detection process is proceeded. 11 5~30 minutes are required depending on the number of the indoor

units and outdoor temperature.

12 The number of the indoor units connected is displayed on7

segment of the outdoor unit main PCB for about 1 minute

- For a HR unit, the number of the indoor units connected to each HR unit is displayed.

- '200' is displayed in case of auto pipe detecting error, and auto pipe detection process is completed after '88' is disappeared.

* Auto pipe detection function : the function that sets connection

relationship automatically between the indoor unit and HR unit.

WARNING

• Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB is replaced.

- Operation error occurs unless power is supplied to the indoor and

HR units.

• Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are different.

• If auto pipe detection process fails, complete it with manual pipe detection (see Manual pipe detection part).

• If auto pipe detection process is completed normally, manual pipe detection is not required.

• If you want to do auto pipe detection again after auto pipe detection fails, do after reset of outdoor unit by all means.

• During 5 minutes after pipe detection is completed, do not turn off the main unit PCB to save the result of pipe detection automatically.

Manual pipe detection

1 Enter the central control address into each indoor unit using its

wired remote controller.

2 Turn No.1 of DIP s/w SW02M of HR unit PCB on. 3 Reset the power of HR unit PCB. 4 On the HR unit PCB, manually set address of each valve of the HR

unit to the central control address of the indoor unit connected to the valve.

5 Reset the power of outdoor unit PCB. 6 The number of the indoor unit installed is displayed after about 5

minutes. Ex) HR ‡ The number of the indoor

7 Reset the power of outdoor unit PCB, HR unit. 8 Manual pipe detection is completed

WARNING

• In case that central controller is not installed, firstly set up central controller’s setting to make address setting of indoor units.

• In case that central controller is installed, please set central control address in wired remote control of indoor unit.

• Do not set central control address of indoor unit to ‘0xFF’. (If the address is ‘0xFF’, pipe detection will not be completed properly.)

• HR unit’s manual pipe address is set by the central control adress of indoor units.

• Address of valve which is not connected with indoor unit should be set differently with the address of a valve which is indoor unit connected(If address is overlapped valve will not work preperly)

• If there occurs some error during pipe detection process,it means pipe detection process is not properly finished.

• If an error occurred, it means that manual pipe setting is not completed.

• During 5 minutes after pipe detection process is completed, do not turn off the main outdoor unit’s PCB to save the result of pipe detection automatically.

Master Outdoor unit’s PCB DIP switch on : No.5

Completion of auto pipe detection process

* It is possible to be generated mode changing noise of

heating and cooling which is normal. There is no mode changing noise at normal operation.

Is the number of

indoor units connected

and displayed

one equal?

Reset the power of HR unit PCB

Conﬁrm that the setting of No.2, 3 of SW02M corresponds with the valve connecion type.

88' is displayed on7 segment of the outdoor unit main PCB

Outdoor unit is operated for 5~60 minues.

The number of indoor units detected is displayed for 30 seconds on the outdoor unit PCB after outdoor unit stopped

Display error on outdoor unit PCB Display error on HR unit PCB

Outdoor unit PCB : HR ơ HR unit number ơ Valve number HR unit : '200'

Check the HR unit and indoor unit

Pipe detection error occurs for 30 seconds.

Check the installation of status of outdoor, indoor, HR unit

Incompletion of auto detection process

Retry auto pipe detection process after Fixing wrong installation

Dose the setting

status satisfy indoor unit’s

conﬁguration properly

during operation?

Conﬁrm indoor unit’s address setting

Turn No.1 of DIP s/w SW02M of HR unit PCB off.

YES

Select the mode using ‘ȯ’, ‘ȭ’ Button : “Idu” Push the ‘Ɨ’ button

Select the “Id 6” function using ‘ȯ’, ‘ȭ’ Button :“StA” Push the ‘Ɨ’ button

Select the “Id 5” function using ‘ȯ’, ‘ȭ’ Button :“Ath” or ”Atc” Push the ‘Ɨ’ button. Outdoor temperature is over 15 °C(59 °F) : Select “Atc” (If fails, use “Ath”) Outdoor temperature is below 15 °C(59 °F) : Select “Ath”(If it fail, use “Atc”)

Flow chart of auto pipe detection process

Setting For Heat Recovery Unit (Refer Only Heat Recovery Installation)

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ENGLISH

- Above setup must be done for all HR unit valves.

- The valve that is not connected with any indoor unit should be addressed with any other number than used address numbers of the valves connected with indoor units. (The valves does not work if the address numbers are same.)

No. Display and setup Setup and Contents

- Operation: None

- Display: None

- Operation: Turn DIP switch No.1 on to address valve #1

- Display: Existing value saved in EEPROM is displayed in 7 segment.

- Operation: Set the digit of 10 to the number in Group High data of the wired remote control connected to the corresponding indoor unit to the valve #1 by pressing left tack S/W.

- Display: Digit increasing with the times of pressing tack S/W is displayed in left 7 segment

- Operation: Set the digit of 1 to the number in Group Low data of the wired remote control connected to the corresponding indoor unit to the valve #1 by pressing right tack S/W.

- Display: Digit increasing with the times of pressing tack S/W is displayed in right 7 segment

- Operation: Turn DIP switch No.1 off to save the address of valve #1

- Display: "11" displayed in 7 segment disappears

7 segment SW01M SW03M SW04M

- Above setup must be done for all HR unit valves.

No. Display and setup Setup and Contents

- Operation: None

- Display: None

- Operation : Turn DIP switch No.1 on to address valve #1

- Display : Existing value saved in EEPROM is displayed in 7 segment.

- Operation : Set the digit of 10(1) to the number in Group High data of the wired remote control connected to the corresponding indoor unit to the valve #1 by pressing left tack S/W.

- Display : Digit increasing with the times of pressing tack S/W is displayed in left 7 segment.

- Operation : SW05M : 1

- Display : Display former value.

- Operation : Setting No. using SW03M and SW04M, SW05M : 1

- Display : Display setting value.

- Operation : Turn DIP switch No.1 off to save the address of valve #1

- Display : "11" displayed in 7 segment disappears.

- Operation : Return valve of addressing HR unit.

- Display : None

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

7 segment SW01M SW03M SW04M

SW05M

Example of manual valve addressing (Zoning setting)

(In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit)

Zoning control is connecting 2 or more indoor units at one pipe of HR unit. In case of Zoning control, in order to set controls with multiple indoor units connection uses the rotary switch. Namely, only the rotary switch changes from same valve set condition and set indoor units connection.

1 On DIP switch of the corresponding valves and sets the rotary

switch at 0.

2 Setting the number with tact switch. 3 In case of addition of indoor units to same port, increases 1 with the

rotary switch and sets number with tact switch.

4 In case of checking the number which the corresponding valve is

stored, turn on DIP switch and set the number of rotary switch.

5 Indoor units set available 7 per a port(rotary switch 0~6), in case of

setting above of 7 with rotary switch, it will display error.

6 Setting the rotary switch on original condition(HR unit number set

conditions) after all finishing a piping setting.

7 The rotary switch set value of above number of indoor units which

is connected with FF and prevents a malfunction. (Example: The case where 3 indoor units is connected in piping 1, sets from rotary switch 0,1,2 and 3,4,5 with FF set)

- Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differently at its wired remote control.

Example of manual valve addressing (NonZoning setting)

(In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit)

- Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differently at its wired remote control.

Flow chart of manual addressing for pipe detection

DIP switch 01

7 Segment SW04C (X : cancel) SW03C (ȯ: forward) SW02C (ȭ: backward)

SW01C (Ɨ: Conﬁrm / Automatic Addressing) SW01D (reset)

Execute in case of Auto pipe detection failure

Turn No.1 of SW02M of HR unit PCB on.

Reset the power of HR unit PCB.

Input the central control address at each indoor unit using wired remote controller.

Set the address of each valve manually by referring indoor unit’s central control address connected with.

Reset the power of outdoor unit PCB.

Wait for about 5 minutes.

The number of the indoor units connected is displayed. Ex) HR The number of connected

indoor units

Is the number

of indoor units connected with the

outdoor unit and displayed

number equal?

YES

Completion of manual pipe detection process

Check the central control address of indoor and HR unit.

Make sure that reset the outdoor Unit’s power after setting central control address of indoor unit’s

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No. Display and setup Setup and Contents

- Operation: Turn DIP switch No.1 on.

- Display: "11" is displayed in 7 segment

- Operation: Turn DIP switch No.1 off.

- 7 segment disappeared

7 segment SW01M

No. Display and setup Setup and Contents

- Operation: more than 2 DIP switches turned on.

- Display: "Er" is displayed in 7 segment

7 segment SW01M

ROTARY 01 ROTARY 02

The connected port number of HR unit

The connected HR unit number The auto addressing number of

indoor unit (digit of 1) The auto addressing number of

indoor unit (digit of 10)

No. of Indoor unit. No. of HR unit branch. No. of HR unit.

ROTARY 01 ROTARY 02 7 segment

CAUTION

• Waiting for 80 seconds after power on.

• The zoning information and Master IDU information remove from EEPROM after Auto-addressing.

• If there is installed the central control, it is impossible setting of Master IDU in zoning.

Outdoor Units (External PCB)

Group Number setting

Group Number setting for Indoor Units

- Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.

- The communication cables connected to CEN.A and CEN.B terminal should be connected to central control of Outdoor Unit with care for their polarity (A-A, B-B).

- Turn the whole system on.

- Set the group and Indoor Unit number with a wired remote control.

- To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

Example) Group number setting

number indicate the group number

2nd number point out indoor unit number

SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V

B(D) A(C)

1 F

Group Indoor unit

Group recognizing the central controller

No.0 group (00~0F) No.1 group (10~1F) No.2 group (20~2F) No.3 group (30~3F) No.4 group (40~4F) No.5 group (50~5F) No.6 group (60~6F) No.7 group (70~7F) No.8 group (80~8F) No.9 group (90~9F) No. A group (A0~AF) No. B group (B0~BF) No. C group (C0~CF) No. D group (D0~DF) No. E group (E0~EF) No. F group (F0~FF)

WARNING

• Valve address and central control address of its corresponding indoor unit should be set identical in manual addressing.

Valve (04)

EX)

Valve (03) Valve (02) Valve (01)

Indoor unit (04) Indoor unit (03) Indoor unit (02) Indoor unit (01)

Central control address

HR unit

Setting the optional function Select the mode/function/option/value using ‘▶’, ‘◀’ Button and

confirm that using the ‘●’ button after DIP switch No.5 is turned on.

Setting method of Master indoor unit in zoning

1 Turn DIP switch 5,6,10 on at system off. 2 Set the left Ratary switch for HR unit.(Rotary switch No. "0" ‘ HR

unit No. "1")

3 Set the right Ratary switch for IDU unit.(Rotary switch No. "0" ‘ HR

unit branch No. "1")

4 Display the Master IDU No. of the HR unit on 7 segment.(Default

display is "00" on 7 segment)

5 Press the black button.(The IDU No. increase every 1 second in the

zoning )

6 Set the Master IDU(Press the red button during 1.5 seconds stop

twinkling)

Method of checking the pipe detection result at outdoor unit

1 Wait for 5 minutes, after Pipe detection is completed. 2 Turn on the No.10,14,16 DIP S/W of SUB PCB at master unit 3 Check the data on 7 segment, switching rotary 01,02.

Identiﬁcation of Manual Valve ID (Address)

Example of checking valve address

(In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit)

SW01C (Ɨ: Conﬁrm / Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP switch 01

7 Segment

SW01D (reset)

SW03C (ȯ: forward)

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Optional Mode Selection Function Selection Option Selection

Remarks

Content

Display (◎)

Content

Display

(◀, ▶ ’ ◎)

Default

Optional

(◀, ▶ ’ ◎)

FDD Fdd

Automatic Refrigerant

Charging (Cooling)

Fd 1 - -

* Refer FDD

guidance

Automatic Refrigerant

Charging (Heating)

Fd 2 - -

Refrigerant Amount

Check (Cooling)

Fd 3 - -

Refrigerant Amount

Check (Heating)

Fd 4 - -

ITR

(Cooling, Heating)

Fd 7 - -

All IDU operation

(Cooling)

Fd 8 - -

Compulsory

Operation for

1 hour

All IDU operation

(Heating)

Fd 9 - -

Installation Func

Cool & Heat

Selector

Fn 1 oFF

oFF,

oP1~oP2

Saving in

EEPROM

High Static Pressure

Compensation

mode

Fn 2 oFF

oFF,

oP1~oP3

Night Low Noise

mode

Fn 3 oFF

oFF,

oP1~oP12

Overall Defrost

mode

Fn 4

North

America: oFF

Europe: oFF

Tropical: oN

on, oFF

ODU address

setting

Fn 5 0 254

Snow Removal &

Rapid Defrost

Fn 6 oFF

oFF,

oP1~oP3

Airflow Adjusting

for IDU (Heating

capacity up)

Fn 7 oFF on, oFF

Target Pressure

Adjusting

Fn 8 oFF

oFF,

oP1~oP6

Low Ambient Kit Fn 9 oFF on, oFF

High Efficiency

Mode (Cooling

Operation)

Fn 10 oFF on, oFF

Auto Dust Removal

Mode

Fn 11 oFF

oFF,

oP1~oP5

Compressor Max.

Frequency Limit

Fn 12 oFF

oFF,

oP1~oP9

ODU Fan Max.

RPM Limit Mode

settting

Fn 13 oFF

oFF,

oP1~oP7

Smart Load Control

Mode setting

Fn 14 oFF

oFF,

oP1~oP3

Humidity Reference

Mode setting

Fn 16 on on, oFF

Central Control

Connection at

Indoor Unit side

Fn 19 oFF oFF, on

Compressor Input

Current Limit mode

Fn 20 oFF

oFF,

oP1~oP10

Power

Consumption

Display on wired

remote controller

Fn 21 SPL0

SPL0, SPL1

[Pd10~Pd11]

Overall Defrost

Operating in Low

temperature

(Heating)

Fn 22 oFF on, oFF

Optional Base panel

Heater

Fn 23 oFF on, oFF

User Idu

Comfort Cooling

Mode setting

Id 10 EAch

* Refer

Comfort Cooling guidance

Saving in

EEPROM

Service SvC Vaccum Mode SE 3 vACC -

1time / 1 Selection

* Functions save in EEPROM will be maintained continuously, though

the system power was reset.

CAUTION

• To perform the otional funtion should be sure that All the IDU is off mode, unless the function will not be performed.

Function setting

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn1” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button : “oFF”,“op1”,“op2” Push the ‘●’ button

Cool & Heat Selection mode is set

Cool & Heat selector

Mode setting method

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• If use a function, first install a Cool & Heat selector.

Switch Control Function

Switch

(Up)

Switch

(Down)

oFF op1(mode) op2(mode)

Right side

(On)

Left side

(On)

Not operate Cooling Cooling

Right side

(On)

Right side

(On)

Not operate Heating Heating

Left side

(Off)

- Not operate Fan mode Off

Switch (Up)

Switch (Down)

Left side

Right side

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FAN Maximum RPM of each step

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn2” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oP1~oP3” Push the ‘●’ button

Start the Static pressure compensation mode :

Save the selected option value in EEPROM

Chassis UXA UXB

Max. RPM

Standard 880 1,000

Overload / Low

Temperature

880 1,150

op1 910 1,040

op2 930 1,070

op3 950 1,100

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn3” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“op1~op12” Push the ‘●’ button

Start the Night low noise function :

Save the selected option value in EEPROM

Time Settings

Step Judgment Time(Hr) Operation Time(Hr)

op1 8 9 op2 6.5 10.5 op3 5 12 op4 8 9 op5 6.5 10.5 op6 5 12 op7 8 9 op8 6.5 10

op9 5 12 op10 Continuous operation op11 Continuous operation op12 Continuous operation

Noise

Chassis UXA UXB

Capacity 8~12hp 14~20hp 22~26hp

Step Noise(dBA) op1~op3,op10 55 59 60 op4~op6,op11 52 56 57 op7~op9,op12 49 53 55

CAUTION

• Request installer to set the function during installation.

• If ODU RPM changes, cooling capacity may go down.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn4” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“on” ~ “oFF” Push the ‘●’ button

Overall defrost mode is set

Mode setting

- on: Operate overall defrost

- off: Operate partial defrost

CAUTION

• Ask an authorized technician to setting a function.

Setting the ODU address

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn5” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“0” ~ “255” Push the ‘●’ button

ODU address is set

Overall defrost mode

Mode setting method

Night Low Noise Function

In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load.

Night low noise function setting method

High Static Pressure Compensation mode

This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan discharge of ODU.

Static pressure compensation mode setting method

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CAUTION

• Ask an authorized technician to setting a function.

• If use a function, first install a Central controller.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn9” Push the ‘●’ button

Low Ambient Kit Mode is set

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

Low Ambient Kit

Mode setting method

h Reference for functional logic of I/O Module

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• Change a power consumption or capacity.

Setting

Mode

Purpose

Condensing temperature

variation

Evaporating

temperature

variation

Heat Cool

op1 Increase capacity Increase capacity

+2 °C

(35.6 °F)

-3 °C

(37.4 °F)

op2

Decrease power

consumption

Increase capacity

+2 °C

(35.6 °F)

-1.5 °C

(-34.7 °F)

op3

Decrease power

consumption

Decrease power

consumption

-4 °C

(-39.2 °F)

+2.5 °C

(36.5 °F)

op4

Decrease power

consumption

Decrease power

consumption

-6 °C

(-42.8 °F)

-4.5 °C

(-40.1 °F)

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“op1” ~ “op4” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn8” Push the ‘●’ button

Target pressure is set

Select the Option using ‘▶’, ‘◀’ Button :

“HEAT” , “COOL” Push the ‘●’ button

Target pressure adjusting

Mode setting method

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

Mode setting

setting Mode

oFF Not setting

op1 Snow removal mode

op2 Rapid defrost mode

op3 Snow removal mode. + Rapid defrost mode.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn6” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1” ~ “op3” Push the ‘●’ button

Mode is set

CAUTION

• Ask an authorized technician to setting a function.

Step Mode

OFF Not setting

ON Low capacity mode

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn7” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“on” ~ “oFF” Push the ‘●’ button

IDU capacity adjusting is set

Setting Capacity Up Airﬂow Adjusting for IDU (Heating)

If the operation of indoor unit is more than 130 %, the air flow is operated as low in the all indoor units.

Mode setting method

Snow removal & rapid defrost

Mode setting method

Page 47

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Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn10” Push the ‘●’ button

High Efficiency Mode is set

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

Mode Setting

Setting

Operation

time

Operating

time

Repeat

cycle

Detail of function

op1

Stop

+2hour

5minutes 2hour

After product stopped 2 hour, fan operating 5min(Repeated every 2 hours)

op2

stop

+5minutes

3minutes

Twice in

2 hour

after product stopped 5 minutes, fan operating 3min (Limited to two times within 2 hours)

op3

stop

+5minutes

3minutes 1 time

after product stopped 2 hour, fan operating 5min(Repeated every 2 hours)

op4

Stop

+1minutes

1minutes 1 time

after product stopped 5 minutes, fan operating 3min(when io module connection/one-time operation)

op5

Stop

+1minutes

1minutes

Low

speed

after product stopped 1minutes, fan operating 1min(every time the product stops)

Function setting

Setting Inverter (Hz)

oFF op1 143 Hz op2 135 Hz op3 128 Hz op4 120 Hz op5 113 Hz op6 105 Hz op7 98 Hz op8 90 Hz op9 83 Hz

CAUTION

• Ask an authorized technician to setting a function.

• If use a function, first install a Central controller.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn13” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op7” Push the ‘●’ button

ODU Fan Max. RPM Limit Mode is set

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn 12” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button : “oFF”,“op1”,“op9” Push the ‘●’ button

Cool & Heat Selection mode is set

ODU Fan Max. RPM Limit

Mode setting method

Compressor Max. Frequency Limit

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn11” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op5” Push the ‘●’ button

Auto Dust Removal Mode is set

Auto Dust Removal Mode

The ability to set reverse run outdoor fan to remove dust, heat exchanger.

Mode setting method

High Efﬁciency Mode (Cooling Operation)

Target low pressure will change according to ODU temperature during the cooling operation.

Mode setting method

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MAX. RPM Limit Setting

Chassis UXA UXB

Fan MAX. RPM

Limit (RPM)

oFF 880 1000 oP1 -20 -50 oP2 -40 -100 oP3 -60 -150 oP4 -80 -200 oP5 -100 -250 oP6 -120 -300 oP7 -140 -350

SLC(Smare Lode Control) Mode

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn14” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op3” Push the ‘●’ button

SLC(Smare Lode Control) Mode is set

Setting Mode Detail of function

oFF Not Setting oP1 Smooth Mode Slowly control, a target pressure value oP2 Normal Mode Normal control, a target pressure value oP3 Peak Mode Fast control, a target pressure value

Mode setting

- on:using humidity sensor

- oFF:not setting

- When used cooling operation of SLC function,it will improve energy effcience because evaporation temperature wll be decreased

- When used heating operation in case of high humidity condition, deforest will be delayed because target high/low pressure will be changed.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn16” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“on” Push the ‘●’ button

Humidity Reference Control mode is set

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn16” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“Fn19” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

Central Control Connection at Indoor

Unit side Mode is set

Compressor Input Current Limit

The current limits of each Compressor Ex)16 A Set op6 >11.2 A

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn20” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~”op10” Push the ‘●’ button

Compressor Input Current Limit mode is set

Mode Compressor Input Current Limit

op1 95 % op2 90 % op3 85 % op4 80 % op5 75 % op6 70 % op7 65 % op8 60 % op9 55 %

op10 50 %

Compressor Input Current Limit

System Input Current Control Mode setting method

Central Control Connection at Indoor Unit side

Mode setting method

Humidity Reference

Mode setting method

SLC (Smart Load Control)

Function for set the variable target pressure which for the high efficiency and comport operation depend on ODU load.

Mode setting method

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CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• If use a function, capacity may go down.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn21” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“SPL0”,“SPL1”,”Pd10”,”Pd11”Push the ‘●’

button

Power Consumption Display on wired remote

controller Mode is set

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn21” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn22” Push the ‘●’ button

Overall Defrost Operating in Low Mode is set

Setting Detail of function

Defualt OFF

Setting ON/OFF Control

Setting Detail of function

SPL0 Not used Smart plug logic

SPL1 Using smart plug logic

Pd10 Not installation

Pd11 PDI was installed

Setting of continous cooling operation

Mode setting Effect

0 No setting 1 Cooling capacity low,Power consumption low 2 Cooling capacity mid,Power consumption mid 3 Cooling capacity high,Power consumption high

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Idu” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Id10” Push the ‘●’ button

EEV pulse appearing

(seg1, seg2:Idu No./seg3, seg4:Mode)

Select the Function using ‘▶’, ‘◀’ Button :

Idu No. setting and Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

Mode setting and Push the ‘●’ button

*Mode can be set 0~3 (”0” is no setting)

Setting of continous cooling operation

Comfort Cooling operation

It is function to reduce the ODU energy consumption by the continuou s operation without thermo off.

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn23” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“on” Push the ‘●’ button

Base pan Heater operation mode is set

CAUTION

• Function to prevent freezing of ODU base pan in a cold area.

• Heater is accesory.(Sold separately)

Base pan Heater operation

Overall Defrost Operating in Low temperature (Heating)

Mode setting method

Power Consumption Display on wired remote controller

Mode setting method

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Self-Diagnosis Function

Error Indicator

- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.

- Error mark is displayed on display window of indoor units and wired remote controller, and 7 segment LED of outdoor unit control board as shown in the table.

- If more than two troubles occur simultaneously, lower number of error code is first displayed.

- After error occurrence, if error is released, error LED is also released simultaneously.

Error Display 1st, 2nd, 3rd LED of 7 segment indicates error number, 4th LED indicates unit number.(* = 1: Master, 2: Slave 1, 3: Slave 2, 4: Slave 3)

Ex) 1051 : Error occurrence with error number 105 at No. 1 outdoor unit (=Master unit)

In case of indoor unit error occurrence, the error number is only shown at remote controller without 7 segment LED of outdoor unit.

Ex) CH → 01 : Error occurrence with error number 01 (at remote controller)

In case of compressor error occurrence, 7 segment LED of outdoor unit control board will display its error number alternately with compressor number.

Ex) 213 → C23 : It means that compressor error occurred with Error No. 21 at No. 3 Outdoor unit (=Slave2)

* Refer to the DX-Venitilation manual for DX-Venitilation error code.

• 1 : Master outdoor unit error, 2 : salve 1 outdoor unit error

• 3 : slave2 outdoor unit error, 4 : slave3 outdoor unit error

Display Title Cause of Error

Indoor unit related error

0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short

0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short

0 3 -

Communication error : wired remote controller ÷ indoor unit

Failing to receive wired remote controller signal in indoor unit PCB

0 4 - Drain pump Malfunction of drain pump

0 5 -

Communication error : outdoor unit ÷ indoor unit

Failing to receive outdoor unit signal in indoor unit PCB

0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short

08 -

Hydro Kit Hot water storage tank Temperature sensor

Pipe temperature sensor is open or short

0 9 - Indoor EEPROM Error

In case when the serial number marked on EEPROM of Indoor unit is 0 or FFFFFF

1 0 - Poor fan motor operation

Disconnecting the fan motor connector / Failure of indoor fan motor lock

1 1 -

Communication error : Hydro Kit Indoor unit ÷ Inv.PCB

Failing to receive Inv. PCB signal in indoor unit

1 2 - Hydro Kit Inv.PCB error Hydro Kit Inv.PCB error

13 -

Hydro Kit Solar heat piping temperature sensor error

Pipe temperature sensor is open or short

1 4 - Hydro Kit Indoor unit Flow switch error Flow switch flow detection error

1 5 - Hydro Kit Liquid pipe Strange overheat Error Temperature sensor defective or hot water inflow

16 -

Hydro KitIndoor unit Inlet and Outlet pipe Temperature sensor Error

Pipe temperature sensor is open or short

17 -

Hydro Kit Indoor unit Inlet pipe Temperature sensor Error Outside air Introduction duct Inlet pipe Temperature sensor Error

Pipe temperature sensor is open or short

18 -

Hydro Kit Indoor unit Outlet pipe Temperature sensor Error

Pipe temperature sensor is open or short

Outdoor unit related error

2 1 *

Outdoor Unit Inverter Compressor IPM Fault

Outdoor Unit Inverter Compressor Drive IPM Fault

2 2 *

Inverter PCB Input Over Current(RMS) of Master Outdoor Unit

Outdoor Unit Inverter PCB Input Current excess (RMS)

2 3 *

Outdoor Unit Inverter Compressor DC Link Low or High Voltage

System is turned off by Master Outdoor Unit DC Link Low/High Voltage.

2 4 * Outdoor Unit High Pressure Switch

System is turned off by Master Outdoor Unit high pressure switch.

2 5 *

Outdoor Unit Input Voltage High/ Low Voltage

Over 537V or below 247V (ARUM***LTE5) Over 310V or below 143V (ARUM***BTE5) Over 598V or below 320V (ARUM***DTE5)

Error No.

Repeat

Error No. of Unit

Error No. of Compressor

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Display Title Cause of Error

2 6 * Outdoor Unit Inverter Compressor Start Failure

The first start failure by Outdoor Unit Inverter Compressor abnormality or Compressor locked

2 9 * Outdoor Unit Inverter Compressor Over Current Outdoor Unit Inverter Compressor Fault OR Drive Fault

3 2 *

Outdoor Unit Inverter Compressor1 High Discharge Temperature

3 3 *

Outdoor Unit Inverter Compressor2 High Discharge Temperature

3 4 * High Pressure of Outdoor Unit High Pressure of Outdoor Unit

3 5 * Low Pressure of Outdoor Unit Low Pressure of Outdoor Unit

4 0 * Outdoor Unit Inverter Compressor CT Sensor Fault Outdoor Unit Inverter Compressor CT Sensor open or short

4 1 *

Outdoor Unit Inverter Compressor1 Discharge Temperature Sensor Fault

Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short

4 2 * Outdoor Unit Low Pressure Sensor Fault Outdoor Unit Low Pressure Sensor open or short

4 3 * Outdoor Unit High Pressure Sensor Fault Outdoor Unit High Pressure Sensor open or short

4 4 * Outdoor Unit Air Temperature Sensor Fault Outdoor Unit Air Temperature Sensor open or short

4 5 *

Outdoor Unit Heat Exchanger Temperature Sensor (Front side) Fault

Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or short

4 6 * Outdoor Unit Suction Temperature Sensor Fault Outdoor Unit Suction Temperature Sensor open or short

4 7 *

Outdoor Unit Inverter Compressor2 Discharge Temperature Sensor Fault

Outdoor Unit Inverter Compressor2 Discharge Temperature Sensor open or short

4 9 * Outdoor Unit Faulty IPM Temperature Sensor Outdoor Unit IPM Temperature Sensor short/open

50*

Omitting connection of R, S, T power of Outdoor Unit

Omitting connection of outdoor unit

5 1 * Excessive capacity of indoor units

Excessive connection of indoor units compared to capacity of Outdoor Unit

52*

Communication error : inverter PCB ’ Main PCB

Failing to receive inverter signal at main PCB of Outdoor Unit

53*

Communication error : indoor unit ’ Main PCB of Outdoor Unit

Failing to receive indoor unit signal at main PCB of Outdoor Unit.

57*

Communication error : Main PCB ’ inverter PCB

Failing to receive signal main PCB at inverter PCB of Outdoor Unit

6 0 * Inverter PCB EEPROM Error of Master Outdoor Unit Access Error of Inverter PCB of Outdoor Unit

6 2 * Outdoor Unit Inverter Heatsink High Temperature

System is turned off by Outdoor Unit Inverter Heatsink High Temperature

65*

Outdoor Unit Inverter Heatsink Temperature Sensor Fault

Outdoor Unit Inverter Heatsink Temperature Sensor open or short

6 7 * Outdoor Unit Fan Lock Restriction of Outdoor Unit

7 1 * Inverter CT Sensor Error of Master Outdoor Unit Inverter CT Sensor open or short of Outdoor Unit

7 5 * Outdoor Unit Fan CT Sensor Error Outdoor Unit Fan CT Sensor open or short

7 7 * Outdoor Unit Fan Over Current Error Outdoor Unit Fan Current is over 6 A

7 9 * Outdoor Unit Fan Start Failure Error

The first start failure by Outdoor Unit Fan abnormality or Fan locked

8 6 * Outdoor Unit Main PCB EEPROM Error

Communication Fail Between Outdoor Unit Main MICOM and EEPROM or omitting EEPROM

8 7 * Outdoor Unit Fan PCB EEPROM Error

Communication Fail Between Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM

1 0 4*

Communication Error Between Outdoor Unit and Other Outdoor Unit

Failing to receive Slave Unit signal at main PCB of Outdoor Unit

1 0 5* Outdoor Unit Fan PCB Communication Error Failing to receive fan signal at main PCB of Outdoor unit

1 0 6* Outdoor Unit Fan IPM Fault Error Instant Over Current at Outdoor Unit Fan IPM

Outdoor unit related error

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Display Title Cause of Error

Outdoor unit related error

1 0 7* Outdoor Unit Fan DC Link Low Voltage Error Outdoor Unit Fan DC Link Input Voltage is under 380V

1 1 3* Outdoor Unit Liquid pipe Temperature Sensor Error Liquid pipe temperature sensor of Outdoor Unit is open or short

1 1 4*

Outdoor Unit Subcooling Inlet Temperature Sensor Error

115 *

Outdoor Unit Subcooling Outlet Temperature Sensor Error

1 1 6 * Outdoor Unit Oil Level Sensor Error Oil Level Sensor of Outdoor Unit is open or short

145 *

Outdoor unit Main Board - External Board communication Error

1 5 0 * Outdoor Unit Discharge Superheat not satisfied

Outdoor Unit Compressor Discharge Superheat not satisfied during 5 Min.

151 *

Failure of operation mode conversion at Outdoor Unit

153 *

Outdoor Unit Heat Exchanger Temperature Sensor (upper part) Fault

154 *

Outdoor Unit Heat Exchanger Temperature Sensor (lower part) Fault

Outdoor Unit Heat Exchanger Temperature Sensor(lower part) open or short

182 *

Outdoor unit External Board Main-Sub Micom communication Error

Outdoor Unit Main Board Main-Sub Micom communication failed

1 8 7 * Hydro - Kit P,HEX bursting error

Inlet water temperature is below 5 degree or water temperature error during defrosting operation.

1 9 3 * Outdoor Unit Fan Heatsink High Temperature

System is turned off by Outdoor Unit Fan Heatsink High Temperature

194 *

Outdoor Unit Fan Heatsink Temperature Sensor Fault

Outdoor Unit Fan Heatsink Temperature Sensor open or short

HR Unit related error

2 0 0 1 Searching pipe Error Failure of automatic addressing of valves

201

C + #HR

HR unit1 Liqiud sensor error Liquid pipe sensor of HR unit open or short

202

C + #HR

HR unit1 Sub Cooling Pipe sensor error Sub Cooling Pipe In sensor of HR unit open or short

203

C + #HR

HR unit1 Sub Cooling Pipe Out sensor error Sub Cooling Pipe Out sensor of HR unit. open or short

204

C + #HR

Communication error Failing to receive HR unit signal at outdoor unit

Network error

2 4 2 * Network error of cntral controller Communication wiring defect

C: HR unit #: HR unit Number

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Checking procedure of limiting concentration

Check Concentration limit along following steps and take appropriate measure depending on the situation.

Calculate amount of all the replenished refrigerant [kg (lbs)] per each refrigerant system.

Calculate minimum room capacity Calculate room capacity by regarding a portion as one room or the

smaller room.

- With partition and with opening which serve as passage of air to adjoining room

- Without partition

Concentration limit is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The Concentration limit shall be described in the unit of [kg/m

(lbs/ft3)] (Freon gas weight per unit

air volume) for facilitating calculation.

Concentration limit: 0.44 kg/m3(0.028 lbs/ft3) (R410A)

Amount of additional replenished refrigerant

Total amount of refrigerant in the system [kg (lbs)]

Note : In case one refrigerant facility is

divided into 2 or more refrigerant systems and each system is independent, amount of replenished refrigerant of each system shall be adopted.

Amount of pre charged refrigerant per single unit system

Amount of replenished refrigerant at factory shipment

Amount of additionally replenished refrigerant depending on piping length or piping diameter by customer

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Opening

Partition

In the case of opening without door , or 0.15 % or more openings (to ﬂoor space) both above and below door)

Outdoor unit

(No.1 system)

Flow of refrigerant

Indoor unit

Room where refrigerant leaks (Refrigerant of the whole No.1 system ﬂows out.)

CAUTION FOR REFRIGERANT LEAK

The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available.

Introduction

Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the Concentration limit even if the refrigerant gas leaks in the room.

Concentration limit

- With partition and without opening which serve as passage of air to adjoining room

Calculate refrigerant concentration

Total amount of

replenishedrefrigerant in

refrigerant facility [kg(lbs)]

Volume of smallest room

whereindoor unit is installed

(ft3)]

- In case the result of calculation exceeds the Concentration limit, perform the same calculations by shifting to the second smallest, and the third smallest rooms until at last the result is below the Concentration limit.

= Maximum concentration limit

[kg/m3 (lbs/ft3)]

(R410A)

In case the concentration exceeds the limit When the concentration exceeds the limit, change original plan or take

one of the countermeasures shown below:

• Countermeasure 1

Provide opening for ventilation. Provide 0.15 % or More size of opening to floor space both above and below door, or provide opening without door.

• Countermeasure 2

Provide gas leak alarm linked with mechanical ventilator.

• Countermeasure 3

Reducing the outdoor refrigerant qty. by deviding into smaller separate system.

Outdoor unit

Indoor unit

Smallest room

Countermeasure 2

Gas leak alarm

Mechanical ventilator

Countermeasure 1

Opening effective to ventilation

Indoor unit

Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is heavier than air.

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• Product Name : Air conditioner

• Model Name :

• Additional information : Serial number is refer to the bar code on the product.

Product Sales Name Model Factory Name

ARUx***LTy5 series x = N (Heat Pump), V (Cooling Only), M (Heat Recovery / Heat Pump) y = S (Basic function),

E (Additional function related to performance)

*** = Numeric; (Cooling capacity)

Product information

Airborne Noise Emission

The A-weighted sound pressure emitted by this product is below 70 dB.

** The noise level can vary depending on the site.

The figures quoted are emission level and are not necessarily safe working levels.

Whilst there is a correlation between the emission and exposure levels, this cannot be used reliably to determine whether or not further precautions are required.

Factor that influence the actual level of exposure of the workforce include the characteristics of the work room and the other sources of noise, i.e. the number of equipment and other adjacent processes and the length of time for which an operator exposed to the noise. Also, the permissible exposure level can vary from country to country.

This information, however, will enable the user of the equipment to make a better evaluation of the hazard and risk.

Model Designation

CAUTION

• Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

• Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

• If outdoor unit is installed close to the seaside, should avoid direct exposure to the sea wind.

INSTALLATION GUIDE AT THE SEASIDE

• Periodic ( 1times per 6 month) cleaning of the dust or salt particles stuck on the heat exchanger is necessary by using clean water

In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.

- It should be strong enough like concrete to prevent the sea wind from the sea.

- The height and width should be more than 150 % of the outdoor unit.

- It should be kept more than 70 cm (2.3 ft) of distance between outdoor unit and the windbreak for smooth air flow.

Select a well-drained place.

Sea wind

Windbreak

Selecting the location(Outdoor Unit)

If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided. Install the outdoor unit on the opposite side of the sea wind direction.

Sea wind

Page 55