LG ARUB160LT2 INSTALLATION INSTRUCTIONS

INSTALLATION MANUAL

AIR CONDITIONER

•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.

TYPE :

www.lg.com

P/NO : MFL46912302

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ARUB Series Outdoor Unit Installation Manual

TABLE OF CONTENTS

Safety Precautions ....................................................................................................................	3
Installation Process ..................................................................................................................	7
Outdoor Unit Information .........................................................................................................	9
Select the Best Location.........................................................................................................	10
Installation Space....................................................................................................................	12
Lifting method .........................................................................................................................	16
Installation ...............................................................................................................................	17
Refrigerant piping installation ...............................................................................................	22
Electrical Wiring ......................................................................................................................	43
HR unit PCB .............................................................................................................................	52
Master Unit and Slaver Unit PCB ...........................................................................................	63
Test Run ...................................................................................................................................	70
Caution For Refrigerant Leak.................................................................................................	91

2 Outdoor Unit

Safety Precautions

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

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■ 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.

Always intstall a dedicated circuit and breaker.

• There is risk of fire or electric shock.

•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 store or use flammable gas or combustibles near the air conditioner.

•There is risk of fire or failure of product.

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, remove, or re-install the unit by yourself (customer).

•There is risk of fire, electric shock, explosion, or injury.

Use the correctly rated breaker or fuse.

•There is risk of fire or electric shock.

Do not install the product on a defective installation stand.

•It may cause injury, accident, or damage to the product.

Installation Manual 3

Safety Precautions

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.

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

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

•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.

Don't use the existing manifold gage for R22 refrigerant.

•Use the manifold gage for high pressure (R410A) as possible as for stable refrigerant filling.

Don't mix and use the R22 pipe and the installation appliances that were used until now

•Mixing the oil of R22 and R410A may cause failure of the unit due to hydrolysis.

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.

■ Operation

Do not damage or use an unspecified power cord.

Use a dedicated outlet for this appliance.

•There is risk of fire, electric shock, explosion, or injury.

Be cautious that water could not enter the product.

•There is risk of fire, electric shock, or product damage.

Take care so that children should not randomly operate the wire remote control for play.

•Frequent conversion to cold or heat mode may cause failure of the unit.

•There is risk of fire or electrical shock.

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 grill 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.

4 Outdoor Unit

			Safety Precautions
■ Installation
Always check for gas (refrigerant) leakage after instal-		Do not install the product where the noise or hot air
lation or repair of product.		from the outdoor unit could damage the neighbor-
		hoods.
• Low refrigerant levels may cause failure of		• It may cause a problem for your neighbors.
product.
Keep level even when installing the product.		Do not install the unit where combustible gas may
		leak.
• To avoid vibration or water leakage.		• If the gas leaks and accumulates around the unit, an
		explosion may result.
Use power cables of sufficient current		Do not use the product for special purposes, such as
carrying capacity and rating.		preserving foods, works of art, etc. It is a consumer air
		conditioner, not a precision refrigeration system.
• Cables that are too small may leak, generate heat, and		• There is risk of damage or loss of property.
cause a fire.

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-frequen- cy 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.

■ 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.

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.

Install and insulate the drain hose to ensure that water is

•A bad connection may cause water leakage.

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Installation Manual 5

Safety Precautions

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

Turn on the power at least 6 hours before starting operation.(In case of outdoor

temperature below 10°C)

•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 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.

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

•Be careful and avoid personal injury.

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

•Rotating, hot, or high-voltage parts can cause injuries.

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

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.

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

•There is risk of property damage, failure of product or electric shock.

Install the HR unit at a place in which it is not affected by operation mode changing noise.

•Installation within cell such as meeting room etc, may disturb business due to noise.

Installation Process

Installation Process

	Determination of division work		Indicate clearly who is to be responsible for switch settings
	Preparation of contract drawings		Make relationship between outdoor, indoor, remote controller, and option connections clear.
			(Prepare control circuit diagram)

Sleeve and insert work

Installation of indoor unit and HR unit

Refrigerant piping work

Drain pipe work

Duct work

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Take account of gradient of drain piping

Check model name to make sure the fitting is made correctly

Special attention to dryness, cleanness and tightness

Adjust to downward gradient

Make sure airflow is sufficient

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

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

Outdoor unit foundation work

Installation of outdoor unit

The foundation must be level

Avoid short circuits and ensure sufficient space is allowed

for service

Airtight Test

Vacuum drying

Additional charge of refrigerant

Automatic addressing for Indoor units and pipe detection

Fit facing panels

Test run adjustment

Transfer to customer with explanation

In the final check for 24hours at 3.80 MPa(38.7 kgf/cm2) there must be no drop in pressure.

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

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

Refer to automatic addressing for Indoor units and pipe detection. Preheat the crank case with the electrical heater for more than 6 hours. (In case of the outdoor temperature below 10°C)

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

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

Explain the proper use of the system as clearly as possible to your customer and make sure all relevant documentations are in order.

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.

Make sure additional charge the refrigerant before automatic addressing of indoor and pipe searching.

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Installation Manual 7

Installation Process

Installation guide at the seaside

CAUTION

1.Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

2.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 performance.

3.If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1)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

Sea wind

2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.

Windbreak

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 keep more than 70 cm of space between outdoor unit and the windbreak for easy air flow.

3)Select a well-drained place.

1.If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.

2.Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water

8 Outdoor Unit

Outdoor Units Information

Outdoor Units Information

•Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100%

(A combination operation over 100% cause to reduce each indoor unit capacity.)

■ Combination Ration(50~200%)

Outdoor Number	Connection Capacity
Single outdoor units	200%
Double outdoor units	160%
Triple outdoor units	130%

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.

1)If the operation of indoor unit is more than 130%, low airflow operation is recommended in all the indoor units.

2)If the operation of indoor unit is more than 130%, additional refrigerant is needed according to the headquarter guidance.

3)Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input

4)The Number of ( ) means the number of max. connectable indoor units, when the connected capacity of indoor units is in the table above.

Power Supply: Outdoor Unit (3Ø, 380~415V, 50 Hz/ 3Ø, 380V, 60Hz)

■ Heat Recovery System

Unit

1 Unit

2 Units

Hp(Equivalent Hp)

8

10

12

14

16

18

20

Model

Name

ARUB80LT2

ARUB100LT2

ARUB120LT2

ARUB140LT2

ARUB160LT2

ARUB180LT2

ARUB200LT2

Combination Unit

ARUB80LT2

ARUB100LT2

ARUB120LT2

ARUB140LT2

ARUB160LT2

ARUB100LT2

ARUB120LT2

ARUB80LT2

ARUB80LT2

Refrigerant

kg

8

8

8

8

8

8+8

8+8

CF(Correction Factor)

kg

-1

0

1

2

3

-1

0

No. of Max. Connectable

Indoor units

13(20)

16(25)

19(30)

23(35)

26(40)

29(36)

32(40)

Net Weight

kg

240

285

285

285

285

240+285

240+285

Dimensions (W*H*D)

mm

1280x1607x730

1280x1607x730

1280x1607x730

1280x1607x730

1280x1607x730

(1280x1607x730)x2

(1280x1607x730)x2

inch

50.4x63.3x28.7

50.4x63.3x28.7

50.4x63.3x28.7

50.4x63.3x28.7

50.4x63.3x28.7

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

Connecting Pipes

Liquid [mm(inch)]

9.52 (3/8)

9.52 (3/8)

12.7 (1/2)

12.7 (1/2)

12.7 (1/2)

15.88 (5/8)

15.88 (5/8)

Suction Gas[mm(inch)]

19.05 (3/4)

22.2 (7/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

Discharge Gas[mm(inch)]

15.88 (5/8)

19.05 (3/4)

19.05(3/4)

22.2 (7/8)

22.2 (7/8)

22.2 (7/8)

22.2 (7/8)

Unit

2 Units

3 Units

Hp(Equivalent Hp)

22

24

26

28

30

32

34

Model

Name

ARUB220LT2

ARUB240LT2

ARUB260LT2

ARUB280LT2

ARUB300LT2

ARUB320LT2

ARUB340LT2

Combination Unit

ARUB140LT2

ARUB160LT2

ARUB140LT2

ARUB140LT2

ARUB160LT2

ARUB160LT2

ARUB140LT2

ARUB80LT2

ARUB80LT2

ARUB120LT2

ARUB140LT2

ARUB140LT2

ARUB160LT2

ARUB120LT2

ARUB80LT2

Refrigerant

kg

8+8

8+8

8+8

8+8

8+8

8+8

8+8+8

CF(Correction Factor)

kg

1

2

3

4

5

6

2

No. of Max. Connectable

Indoor units

35(44)

39(48)

42(52)

45(56)

49(60)

52(64)

55(64)

Net Weight

kg

240+285

240+285

285x2

285x2

285x2

285x2

240+285x2

Dimensions (W*H*D)

mm

(1280x1607x730)x2

(1280x1607x730)x2

(1280x1607x730)x2

(1280x1607x730)x2

(1280x1607x730)x2

(1280x1607x730)x2

(1280x1607x730)x3

inch

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x2

(50.4x63.3x28.7)x3

Connecting Pipes

Liquid [mm(inch)]

15.88 (5/8)

15.88 (5/8)

19.05 (3/4)

19.05 (3/4)

19.05 (3/4)

19.05 (3/4)

19.05 (3/4)

Suction Gas[mm(inch)]

34.9 (1 3/8)

34.9 (1 3/8)

34.9 (1 3/8)

34.9 (1 3/8)

34.9 (1 3/8)

34.9 (1 3/8)

34.9 (1 3/8)

Discharge Gas[mm(inch)]

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

28.58 (1 1/8)

Unit					3 Units
Hp(Equivalent Hp)		36	38	40	42	44	46	48
Model	Name	ARUB360LT2	ARUB380LT2	ARUB400LT2	ARUB420LT2	ARUB440LT2	ARUB460LT2	ARUB480LT2
	Combination Unit	ARUB140LT2	ARUB160LT2	ARUB160LT2	ARUB160LT2	ARUB160LT2	ARUB160LT2	ARUB160LT2
		ARUB140LT2	ARUB140LT2	ARUB160LT2	ARUB160LT2	ARUB140LT2	ARUB160LT2	ARUB160LT2
		ARUB80LT2	ARUB80LT2	ARUB80LT2	ARUB100LT2	ARUB140LT2	ARUB140LT2	ARUB160LT2
Refrigerant	kg	8+8+8	8+8+8	8+8+8	8+8+8	8+8+8	8+8+8	8+8+8
CF(Correction Factor)	kg	3	4	5	6	7	8	9
No. of Max. Connectable Indoor units		58(64)	61(64)	64(64)	64(64)	64(64)	64(64)	64(64)
Net Weight	kg	240+285x2	240+285x2	240+285x2	285x3	285x3	285x3	285x3
Dimensions (W*H*D)	mm	(1280x1607x730)x3	(1280x1607x730)x3(1280x1607x730)x3		(1280x1607x730)x3	(1280x1607x730)x3	(1280x1607x730)x3	(1280x1607x730)x3
	inch	(50.4x63.3x28.7)x3	(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3		(50.4x63.3x28.7)x3	(50.4x63.3x28.7)x3	(50.4x63.3x28.7)x3	(50.4x63.3x28.7)x3
Connecting Pipes	Liquid [mm(inch)]	19.05 (3/4)	19.05 (3/4)	19.05 (3/4)	19.05 (3/4)	19.05 (3/4)	19.05 (3/4)	19.05 (3/4)
	Suction Gas[mm(inch)]	41.3 (1 5/8)	41.3 (1 5/8)	41.3 (1 5/8)	41.3 (1 5/8)	41.3 (1 5/8)	41.3 (1 5/8)	41.3 (1 5/8)
	Discharge Gas[mm(inch)]	28.58 (1 1/8)	34.9 (1 3/8)	34.9 (1 3/8)	34.9 (1 3/8)	34.9 (1 3/8)	34.9 (1 3/8)	34.9 (1 3/8)

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Installation Manual 9

Select the Best Location

Select the Best Location

■ Select installation location of the outdoor unit suitable for following conditions

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

•No direct thermal radiation from other heat sources

•No possibility of annoying the neighbors by noise from unit

•No exposition to strong wind

•With strength which bears weight of unit

•Note that drain flows out of unit when heating

•With space for air passage and service work shown next.

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

•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.

•Don't operate heating mode when the outdoor air temperature is -20°C or lower.

•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.

1. 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 sunshine always shines.

2. Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of installing the outdoor unit in winter at following location:

(1)Shade position with a narrow space

(2)Location with much moisture in neighboring floor.

(3)Location with much humidity around.

(4)Location where ventilation is good.

It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.

(5)Location where water gathers since the floor is not even.

10 Outdoor Unit

Installation Space

ν 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.

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room etc. may disturb business due to noise.)

• 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

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

(Unit: mm)

481

7

100 more

(Serviceing space)

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			(NOTICE 2)
	1	(Servicing space)	(Servicing space)
	2
	3

100 more (Serviceing space)

<![if ! IE]>

<![endif]>450

	Inspection door(NOTICE 1)
	(servicing space)	300more	450more
450			(NOTICE 2)
		(Servicing space)	(Servicing space)

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(174)	453	(174)

	124
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61	419

6

4 5

	<![if ! IE]> <![endif]>60
(137)	<![if ! IE]> <![endif]>30

					(Unit: mm)
	No.	Part Name		Description
			PRHR040	PRHR030	PRHR020
	1	Low pressure Gas pipe connection port	Ø28.58 Brazing connection	Ø28.58 Brazing connection	Ø22.2 Brazing connection
	2	High pressure Gas pipe connection port	Ø22.2 Brazing connection	Ø22.2 Brazing connection	Ø19.05 Brazing connection
			Ø12.7 Brazing connection
	3	Liquid pipe connection port	(Before 2011.4.1 Product)	Ø12.7 Brazing connection	Ø9.52 Brazing connection
			Ø15.88 Brazing connection
			(After 2011.4.1 Product)
	4	Indoor unit Gas pipe connection port	Ø15.88 Brazing connection	Ø15.88 Brazing connection	Ø15.88 Brazing connection
	5	Indoor unit Liquid pipe connection port	Ø9.52 Brazing connection	Ø9.52 Brazing connection	Ø9.52 Brazing connection
	6	Control box	-	-	-
	7	Hanger metal	M10 or M8	M10 or M8	M10 or M8

NOTICE :

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

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

Installation Manual 11

Installation Space

Installation Space

Individual Installation

■ Basic space required

A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 700 mm should be provided, the same as at the front.

C

A 700 mm or more (Control box is of a open/close type)

B250 mm or more

CTop discharge (open in principle)

D

DFront inlet (open in principle)

ERear inlet (open in principle)

< Side view >

Rear Side		B
Front Side	<![if ! IE]> <![endif]>Box
	<![if ! IE]> <![endif]>Control
		A

■ When inlet air enters from right and left sides of unit

A700 mm or more

(Control box is of a open/close type)

B250 mm or more

C150 mm from the wall

CAUTION

Wall height(H) must not exceed height of the product. If the wall height is higher than the whole height of product by (h), Add (h) to , .

A	B
	h

H

< Side view >

Rear Side

A

Rear Side

A

E

	<![if ! IE]> <![endif]>Box		Front Side		<![if ! IE]> <![endif]>Box
Front Side	<![if ! IE]> <![endif]>Control				<![if ! IE]> <![endif]>Control
		B				B
			< Top view >
Rear Side						B
Front Side				<![if ! IE]> <![endif]>Box
				<![if ! IE]> <![endif]>Control
						A

Rear Side	B		Rear Side	B
C	C	C		C
Front Side	A		Front Side A

< Top view >

	Rear Side		Rear Side
	B		B
C	C	C	C
	Front Side		Front Side
	A		A

A250 mm or more

(350mm or more at the coastal area)

B150 mm from the wall

CAUTION

Wall height(H) must not exceed height of the product. If the wall height is higher than the whole height of product by (h), Add (h) to , .

A	Rear Side	A		Rear Side	A
h
	B	B	B		B
H	Front Side			Front Side
< Side view >			< Top view >

	Rear Side		Rear Side
	A		A
B	B	B	B
	Front Side		Front Side

12 Outdoor Unit

Installation Space

■ When unit is surrounded by walls

A700 mm or more (Control box is of a open/close type)

B250 mm or more

Rear Side	B
B	B
Front Side	A

Rear Side	B
B	B
Front Side	A

Rear Side	B
B	B
Front Side	A
	Rear Side	B
B		B
	Front Side	A

■ When there is an obstruction above the unit

		A
	A
A 45° or more	B	B
B 200 mm or more
C 250 mm or more	C	C

< Front view >

A

B

C

C

A700 mm or more

B250 mm or more

DAir guide

EAir outlet guide (procured at the side)

	< Front view >
D			587.6
E
B	A	Door
Rear	Front Side		372.5
		390
Side			125	723.5
			< Air guide >

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Installation Manual 13

Installation Space

Collective / Continuous installation

Space required for collective installation and continuous installation:When installing several units, leave the space between each block as shown below considering passage for air and people.

A(Be opened)

B900mm or more (control box is of a open/close type)

C250 mm or more

D150 mm or more

	<![if ! IE]> <![endif]>Front Side	<![if ! IE]> <![endif]>Rear Side	<![if ! IE]> <![endif]>Front Side	<![if ! IE]> <![endif]>Rear Side
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Rear Side

Rear Side

Rear Side

Rear Side

Front Side

Front Side

Front Side

Front Side

B = 1250mm or more at the coastal area

	<![if ! IE]> <![endif]>Side Front	<![if ! IE]> <![endif]>Side Rear	<![if ! IE]> <![endif]>Side Front	<![if ! IE]> <![endif]>Side Rear
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<![if ! IE]> <![endif]>Rear Side

<![if ! IE]> <![endif]>Front Side

<![if ! IE]> <![endif]>Rear Side

<![if ! IE]> <![endif]>Front Side

<![if ! IE]> <![endif]>Rear Side

Rear Side

D

Rear Side

D

Rear Side

D

Rear Side

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<![if ! IE]> <![endif]>Rear Side

<![if ! IE]> <![endif]>Front Side

<![if ! IE]> <![endif]>Rear Side

Front Side

Front Side

Front Side

Front Side

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	<![if ! IE]> <![endif]>Front Side	<![if ! IE]> <![endif]>Rear Side	<![if ! IE]> <![endif]>Front Side		<![if ! IE]> <![endif]>Rear Side

Rear Side	D	Rear Side	D	Rear Side	D	Rear Side
Front Side		Front Side		Front Side		Front Side

14 Outdoor Unit

Installation Space

Cautions in winter especially for seasonal wind

• Sufficient measures are required at a snow area or severe cold area in winter so that product can be operated

well.
• Get ready for seasonal wind or snow in winter even in other area.
• Install a suction and discharge duct not to let in snow or rain.		<![if ! IE]> <![endif]>ENGLISH
snowfall) if it is installed at the area with much snowfall.
• Install the outdoor unit not to 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 50cm than the average snowfall (annual average
• Where snow accumulated on the upper part of the outdoor unit by more than 10cm, always remove snow for
operation.
1. 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)
2. Don't install the suction hole and discharge hole of the outdoor unit facing to the seasonal wind.

Installation Manual 15

Lifting Method

Lifting method

•When carrying the unit suspended, 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.

A 40° or less

WARNING

CAUTION

Be very careful while carrying the product.

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

•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 of it.

•Use 2 belts of at least 8 m 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.

16 Outdoor Unit

Installation

Installation

Location of anchor bolt

■ Individual installation

		10		10
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	<![if ! IE]> <![endif]>700
		900±2 383	900±2	383 900±2

■ Example of collective installation

	<![if ! IE]> <![endif]>±2	UW1	UW1	UW1	UW1	UW1	UW1
	<![if ! IE]> <![endif]>700

					150
	10		10				10		10
900±2	383	900±2	383	900±2	533	900±2	383	900±2	383	900±2

■ Installation foot (Location of anchor bolt)

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900mm

Installation Manual 17

Installation

Foundation for Installation

•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 200mm).

	Spring washer		Anti-vibration
			materials
				Four bolt are
	Frame	Nut	Concrete
			base	required
H-Beam
				3 thread ridges
			<![if ! IE]> <![endif]>75
<![if ! IE]> <![endif]>100	<![if ! IE]> <![endif]>75		<![if ! IE]> <![endif]>200	<![if ! IE]> <![endif]>200

Foundation bolt executing method

WARNING

•Be sure to install unit in a place strong enough to withstand its weight.

Any lack of strength may cause unit to fall down, resulting in a personal injury.

•Have installation work in order to protect against a strong wind and earthquake. Any installation deficiency may cause unit to fall down, resulting in a personal injury.

•Especially take care for support strength of the floor surface, water drain processing (processing of water flown out from the outdoor unit during operation) and paths of the pipe and wiring when making a base support.

•Don't use a tube or pipe for water drain in the base pan and perform water drain processing by using the drain path. Water drain may be done due to freezing of a tube or pipe.

Rear view

Side view

Water

Drain

Path

18 Outdoor Unit

Installation

Preparation of Piping

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

1)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 1.5m longer than the pipe length.

2)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.

Copper		Slanted Uneven Rough
tube	90°

Pipe

Reamer

Point down

3)Flaring work

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

Indoor unit	Pipe (Inch)		" A " (mm)
[kW(Btu/h]	Gas	Liquid	Gas	Liquid
<5.6(19,100)	1/2"	1/4"	1.6~1.8	1.1~1.3
<16.0(54,600)	5/8"	3/8"	1.6~1.8	1.5~1.7
<22.4(76,400)	3/4"	3/8"	1.9~2.1	1.5~1.7

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

4)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.

	Handle
Bar	Bar
"A"	Yoke
	Cone

Copper pipe

Clamp handle

Red arrow mark

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Inclined Surface Cracked Uneven

damaged thickness

Even length all round

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Installation Manual 19

Installation

Flare shape and flare nut tightening torque

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.

pipe size	tightenig torque	A	flare shape
mm	N.m(kgf.cm)	mm	90° ±2
Ø9.52	32.7-39.9(327~399)	12.8-13.2	45°±2
			A
Ø12.7	49.5-60.3(495~603)	16.2-16.6
			R=0.4~0.8
Ø15.88	61.8-75.4(618~754)	19.3-19.7

CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are	Union
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.

Opening shutoff valve

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.

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

	Outside diameter		Torque
mm		inch	N.m(kgf•cm)
Ø6.35		1/4	18~25(180~250)
Ø9.52		3/8	34~42(340~420)
Ø12.7		1/2	55~66(550~660)
Ø15.88		5/8	63~82(630~820)
Ø19.05		3/4	99~121(990~1210)

20 Outdoor Unit

Installation

Heat insulation

1.Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).

2.Precautions in high humidity circumstance:

This air conditioner has been tested according to the

"KS Standard 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), water drops are liable

Indoor unit

to fall. In this case, add heat insulation material according to the following procedure:

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

•Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.

•Stick glass wool on all air conditioners that are located in ceiling atmosphere.

•In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick piping) and drain piping, add further 10mm to 30mm thickness material.

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Installation Manual 21

Refrigerant piping installation

Refrigerant piping installation

WARNING

Always use extreme care to prevent the refrigerant gas (R-410A) from the leakage while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning. Never perform brazing in an unventilated room. Always conduct an inspection for gas leakage after installation of the refrigerant piping has been completed.

Cautions in pipe connection/valve operation

Cut both the pipe and the valve with a cutter to suit the length

(Don't cut the length of less than 70mm)

Open status when both the pipe and the valve are in a straight line.

WARNING

After completing work, securely tighten both service ports and caps so that gas does not leak.

Pipe joint (auxiliary parts): Securely perform brazing with a nitrogen blow into the service valve port. (Releasing pressure : 0.02 MPa or less)

Flare nut: Loose or tighten flare nut by using the wrench with both ends. Coat the flare connection part with oil for the compressor.

Service port: Make the refrigerant pipe vacuum and charge it using the service port. Always reattach caps after completing work (tightening torque of service cap: 14 N.m (140kgf.cm) or more).

Liquid pipe

Low Pressure Gas pipe

High Pressure Gas pipe Elbow joint

1

Ball Valve Flare Valve (Liquid pipe)

(High Pressure Gas pipe)

Ball Valve

(Low Pressure Gas pipe)

22 Outdoor Unit

		Refrigerant piping installation
	When connecting the pipes from the front of	3
		Knock out
	the outdoor unit, remove part and part .
	When connecting the pipes from the side of the	Communication Line Hole
	outdoor unit, remove part (the whole "Knock	Power Cable Hole
		Pipe Hole
	out" part).

(Front)

(Side)

WARNING

After installing the pipe, clog the pipe excavation inlet of the front panel and the side panel (Wire may be damaged due to entering of rats, animals, etc).

CAUTION

	When you use the Hi/Low pressure common pipe to			Cut the pipe with a
				cutter to suit the length.
	connect 2~3 ODU, please remove the factory supplied Service			(Don't cut less than 70mm)
	rubber cap as shown in the figure.	port cap
	When installing just one ODU, please	Outdoor unit	Liquid
	make sure to remove the factory supplied
		joint pipe (used	valve	70mm
	rubber cap and replace it by brazing the	for more than 2
	copper cap supplied with manual in ODU. units installation) Cap
	If you do not replace the factory supplied			Gas valve

rubber cap, there might be refrigerant leakage.

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Installation Manual 23

Refrigerant piping installation

Connection of Outdoor Units

2 outdoor units

Model	Low Pressure Gas Pipe			Liquid Pipe		High Pressure Gas Pipe
	Ø34.9				Ø 9.52	Ø22.2
							Ø19.05
	Ø31.8		Ø28.58		Ø12.7	Ø28.58
				Ø19.05
			Ø12.7
			Ø19.05				Ø15.88
ARCNB20	Ø28.58	Ø28.58	Ø22.2	Ø15.88	Ø12.7	Ø22.2	Ø22.2
	OD34.9	Ø19.05	Ø15.88			Ø15.88
				Ø22.2	OD12.7
		OD28.58				OD22.2
	Ø38.1	Ø22.2	OD19.05	OD19.05	Ø9.52	Ø19.05

3 outdoor units

Model	Low Pressure Gas Pipe			Liquid Pipe			High Pressure Gas Pipe
	Ø34.9					Ø9.52	Ø22.2		Ø19.05
	Ø31.8		Ø28.58				Ø28.58
						Ø12.7
				Ø19.05
			Ø12.7
			Ø19.05						Ø15.88
ARCNB20		Ø28.58	Ø22.2		Ø12.7			Ø22.2	Ø22.2
	Ø28.58
				Ø15.88
	OD34.9	Ø19.05	Ø15.88					Ø15.88
		OD28.58		Ø22.2	OD12.7			OD22.2
	Ø38.1	Ø22.2	OD19.05					Ø19.05
				OD19.05		Ø9.52
	Ø41.3					Ø15.88	Ø34.9
			Ø34.9
	Ø38.1					Ø19.05			Ø28.58
			Ø19.05				Ø31.8
						Ø12.7			Ø19.05
		Ø28.58	Ø28.58		Ø12.7			Ø22.2	Ø22.2
ARCNB30	Ø34.9
				Ø22.2			Ø28.58
		Ø19.05
		OD28.58		OD12.7				Ø15.88
								OD22.2
		Ø22.2
				Ø9.52				Ø19.05

24 Outdoor Unit

Refrigerant piping installation

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.

Six-sided Nut (M10 or M8)

Hanger metal

Flat washer (M10)

Hanging bolt (M10 or M8)

A

Insulation

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.

				Gas pipe
Low pressure	HR Unit			Liquid pipe
Gas pipe
	1	2	3	4
				Gas pipe
Liquid pipe High pressure
Gas pipe				Liquid pipe

CAUTION:

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).

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Installation Manual 25

Refrigerant piping installation

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 rooms and HR unit for 2 rooms.

2		2	3		2	3	4
				1
1	1

PRHR020(2 rooms) PRHR030(3 rooms) PRHR040(4 rooms)

Joint Method of HR Unit (Big Duct : URNU76GB8-, URNU96GB8-)

Joint Method is required when B5/B8 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.

1st HR Unit				2nd HR Unit
1	2	3	4	1	2	3	4
B5		BG		BH		B5
(96k)		(28k)		(21k) (76k)

WARNING

•1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW (48kBtu/hr) for max installation).

•The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW (160kBtu/hr). In case of installation of four indoor units of 14.1kW (48kBtu/hr), use two PRHR020's rather than one PRHR040.

	Liquid pipe
	Low pressure gas pipe				2	3	4
				1
	High pressure gas pipe
	Remove caps on			Gas pipe Ø15.88
	The brazing part.
				Liquid pipe Ø9.52
				Brazing Type
							(Unit: mm)
	HR unit	PRHR020	PRHR030	PRHR040
	Low pressure gas pipe	Ø22.2	Ø28.58	Ø28.58
	High pressure gas pipe	Ø19.05	Ø22.2	Ø22.2
	Liquid pipe	Ø9.52	Ø12.7	Ø12.7(Before 2011.4.1 Product)
				Ø15.88(After 2011.4.1 Product)

26 Outdoor Unit

							Refrigerant piping installation
[ Reducers for indoor unit and HR unit ]
									(Unit: mm)
	Models	Liquid pipe				Gas pipe
							Low pressure
				High pressure						<![if ! IE]> <![endif]>ENGLISH
Indoor unit
reducer		OD9.52 Ø6.35
							OD15.88		Ø12.7
	PRHR020			OD19.05	Ø15.88	Ø12.7	OD22.2	Ø19.05	Ø15.88
		OD9.52 Ø6.35
				OD12.7		Ø9.52	OD15.88		Ø12.7
HR unit	PRHR030/
	PRHR040			OD22.2	Ø19.05	Ø15.88	OD28.58	Ø22.2	Ø19.05
reducer	(Before
	2011.4.1	OD12.7		Ø9.52
	Product)
				OD15.88	Ø12.7
							OD19.05	Ø15.88
	PRHR040
	(After			OD22.2	Ø19.05	Ø15.88	OD28.58	Ø22.2	Ø19.05
	2011.4.1
	Product)
		OD15.88	Ø12.7	Ø9.52
				OD15.88	Ø12.7
							OD19.05	Ø15.88

Installation Manual 27

Refrigerant piping installation

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

3.8MPa. We recommend the following table as the minimum wall thickness.

	Outer diameter	6.35	9.52	12.7	15.88	19.05	22.2	25.4	28.58	31.8	34.9	38.1	41.3
	[mm]
	Minimum	0.8	0.8	0.8	0.99	0.99	0.99	0.99	0.99	1.1	1.21	1.35	1.43
	thickness [mm]

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
ARBLB01621		ARBLB03321
ARBLB07121		ARBLB14521

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.The system 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 pipe length and the amount of additional refrigerant.

9.Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.

10.Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.

11.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.

12.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 compressors and flux can harm the copper piping or refrigerant oil.

13.Diameter of the refrigerant pipe from the HR unit to the indoor unit is determined by capacity of the indoor unit. The pipe port is installed to suit a large capacity of the indoor unit for the connection flare of the HR unit. It is sufficient to cut, connect and install the subsidiary flare to suit the pipe of the indoor unit connected.

14.Take care so that there is no thermal damage on the service valves of the outdoor unit. (Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it.

28 Outdoor Unit