LG ARUN120LM3 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.your set and retain it for future reference.

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MODELS : ARUN***LM3 Series

Solo

Heat Pump

P/NO : MFL46912331

ENGLISH ITALIANO ESPAÑOL

FRANCAIS

DEUTSCH

PORTUGUESE

РУССКИЙ ЯЗЫК

ARUN***LM3 Series Outdoor unit Installation Manual

TABLE OF CONTENTS

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Safety Precautions................................................................................................................3

Installation Process ..............................................................................................................7

Outdoor units Information....................................................................................................8

Environment-friendly Alternative Refrigerant R410A .......................................................9

Select the Best Location ......................................................................................................9

Installation Space................................................................................................................10

Lifting method .....................................................................................................................12

Installation ...........................................................................................................................13

Refrigerant piping installation ...........................................................................................18

Pipe connections between indoor and outdoor unit.......................................................21

Electrical Wiring ..................................................................................................................36

Test Run...............................................................................................................................52

New Function .....................................................................................................................69

Caution For Refrigerant Leak.............................................................................................78

Installation guide at the seaside........................................................................................80

2 Outdoor Unit

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Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

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

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

n 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 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.

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Installation Manual 3

Safety Precautions

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.

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.

n 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.

Do not touch the power switch with wet hands.

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

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.

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.

4 Outdoor Unit

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Safety Precautions

n 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, highfrequency 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.

n 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.

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Installation Manual 5

6 Outdoor Unit

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Safety Precautions

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.

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.

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.

Installation Process

• 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 wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure

3.8MPa.

• 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.)

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Installation Manual 7

Determination of division work

Preparation of contract drawings

Sleeve and insert work

Installation of indoor unit

Refrigerant piping work

Drain pipe work

Duct work

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Airtight test

Vacuum drying

Additional charge of refrigerant

Indicate clearly who will be responsible for switch setting.

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

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 should be selected)

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

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

Outdoor unit foundation work

Installation of outdoor unit

) there must be no drop in pressure.

The foundation must be level even

Avoid short circuits and ensure sufficient space is allowed for service

Fit facing panels

Automatic addressing of indoor unit

Test run adjustment

Transfer to customer with explanation

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

Refer to automatic addressing flowchart Preheat the crank case with the electrical heater for more than 6 hours.

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

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

Outdoor units Information

n Combination ratio of indoor units : 50 ~ 130%

1. We can guarantee the operation only within 100% combination. If you want to connect more than 100% combination, please contact us and discuss.

2. If the operation of indoor unit is more than 100%, the airflow is operated as low in the all indoor units.

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

8 Outdoor Unit

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Unit System(HP) Model

Product Charge kg Max. Connectable No. of Indoor Units Net Weight kg

lbs

Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes[mm(inch)] Gas Pipes[mm(inch)]

1 Outdoor unit

8 10 12

ARUN80LM3 ARUN100LM3 ARUN120LM3 ARUN80LM3 ARUN100LM3 ARUN120LM3

5.0 5.5 5.5 13 16 20 175 x 1 218 x 1 218 x 1 385 x 1 480 x 1 480 x 1

(920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1 (920 x 1,680 x 760) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1 (36.2 x 66.1 x 29.9) x 1

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

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

Environment-friendly Alternative Refrigerant R410A

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Installation Manual 9

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 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 unit 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.

• 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 there is always sunshine.)

• 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 be also 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. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.

Environment-friendly Alternative Refrigerant R410A

CAUTION:

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

• 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.

Installation Space

Individual Installation

n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space

as shown in the figures below.

a e

Category

Case 1

(10mm≤Side Space≤49mm)

Case 2

(Side Space

≥

49mm)

Installation Space

4 sides are

walls

Only 2 sides

are walls

Limitations on

the height of

the wall

(Refer to 4

side walls)

Front

No limit to the height of the wall

Front

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

• The height of the wall on the inlet side must be 500mm 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 inlet side by 1/2 of h1.

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

- h2= A(Actual height) - 1500

- h1= B(Actual height) - 500

A≥10 A≥50 B≥300 B≥100 C≥10 C≥50 D≥500 D≥500

A≥10 A≥50 B≥300 B≥100 C≥10 C≥50 D≥500 D≥500 E≥20 E≥100

A≥10 A≥50 B≥300 B≥100 C≥10 C≥50 D≥500 D≥500 E≥20 E≥100 F≥600 F≥500

A≥10 A≥50 B≥300 B≥100 C≥10 C≥50 D≥300 D≥100 E≥20 E≥100 F

≥500 F≥500

A≥10 B≥300

A≥200 B≥300 E≥400

10 Outdoor Unit

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QUPP



UPP

Installation Space

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Installation Manual 11

Seasonal wind and cautions in winter

• Sufficient measures are required in 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 areas.

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

• 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 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 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 the seasonal wind.

Lifting Method

12 Outdoor Unit

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• 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.

Lifting method

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.

• 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.

Weight per Capacity

Chassis

Capacity(HP) Weight(kg)

UX2

8 175

10 218

12 218

Locking points for

transportation ropes

Forklift Carrying Hole

Forklift Carrying Guide

Lifting Method

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Installation Manual 13

Installation

The location of the Anchor bolts

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

• The outdoor unit supports at the bottom shall have width of at least 100mm under the unit°Øs legs before being fixed.

• The outdoor unit supports should have minimum height of 200mm.

• Anchor bolts must be inserted at least 75mm.

Chassis

Capacity(HP)

A (mm) B (mm)

UX2 8~12 920 792

For outdoor units of 23kW or above should not be supported only by the corner supports.

least 100mm

At least 100mm

6565

At least 65At least 65

Unit : mm

730

760

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).

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 pan. Use drainage instead for water outlet. The tube or pipe may freeze and the water may not be drained.

WARNING

At least 200mm

Unit : mm

200

100

- 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

Pallet(Wood Support)

- Remove before Installation

Installation

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• Be sure to remove the Pallet(Wood Support) of the bottom side of the outdoor unit Base Pan 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.

Installation

ENGLISH

Installation Manual 15

Preparation of Piping

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.

3) 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.

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.

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

Pipe

" A "

Gas Liquid Gas

Liquid <5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5 <16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8 <22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8

Indoor unit [kW(Btu/h]

Copper

tube

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

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.

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.

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.

Tightening torque

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.

Opening shutoff valve

Closing shutoff valve

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

Shutoff

valve size

Ø6.4 Ø9.5

Ø12.7

Ø15.9

13.5-16.5

18-22

14-17 33-39 50-60

62-75

23-27

13.5-16.5

5.4-6.6

Hexagonal

wrench 4mm

Hexagonal

wrench 6mm

8.1-9.9

11.5-13.9

Tightening torque N-m(Turn clockwise to close)

Shaft(valve body)

Gas line piping attached to unit

Cap(Valve lid) Service port Flare nut

pipe size tightening torque(Ncm) A(mm) flare shape

Ø9.5 3270-3990 12.8-13.2

Ø12.7 4950-6030 16.2-16.6

Ø15.9 6180-7540 19.3-19.7

Installation

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Union

±2

90°

45°

±2

R = 0,4~0,8

Installation

ENGLISH

Installation Manual 17

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 "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), 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 the heat-resistance temperature.

• Add the insulation over 10mm thickness at high humidity environment.

HEAT INSULATION

Indoor unit

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

Precautions on Pipe connection / Valve operation

Refrigerant piping installation

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.

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.

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 the cables.)

Refrigerant piping installation

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Gas pipe

Liquid pipe

Refrigerant piping installation

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Installation Manual 19

To Outdoor Unit

Sealed Piping

A B

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.

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.

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 .)

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.

Caution

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Y branch

ARBLN01621, ARBLN03321, ARBLN07121,

ARBLN14521, ARBLN23220

Header

4 branch 7 branch 10 branch

Outer diameter

(mm)

6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58

Minimum

Thickness (mm)

0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99

Refrigerant piping installation

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.

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.

20 Outdoor Unit

Solo

- Heat Pump

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

• Be sure to let 0.2kgf/cm

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.

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

Refrigerant Pipe

Regulator

Nitrogen

Nitrogen Direction

Taping

Valve

Pipe connections between indoor and outdoor unit

Preparation Work

Pipe connections between indoor and outdoor unit

ENGLISH

Installation Manual 21

n 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:

1. Verify whether the liquid/gas/common pipes are locked.

2. Extract remaining refrigerant or air inside using the

service port.

3. Remove the leakage prevention cap

Left Side Pipe Draw Out

Front Side Pipe Draw Out

Right Side Pipe Draw Out

Remove Area for Liquid/ Gas pipe Bottom side connections

Service port

Liquid Pipe

Gas Pipe

Leakage prevention cap

n Method of drawing out pipes on the bottom side

n 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.

Method of drawing out pipes

Pipe connections between indoor and outdoor unit

22 Outdoor Unit

Solo

- Heat Pump

Liquid pipe Gas pipe

Pipe Knock Out for Liquid/

Gas pipes

Remove only Liquid/ Gas pipe knock out

View without base pan

View without Side Panel

n Figure of Sides when drawing out through bottom pipe

Liquid Pipe

Gas Pipe

Pipe connections between indoor and outdoor unit

ENGLISH

Installation Manual 23

u Y branch method

Refrigerant piping system

u Header Method

u Combination of Y branch/header method

Branch pipe can not be used after header

L100m

40m

H 50m

L 100m

H 50m

40m

L 50m

L 100m

40m

Pipe connections between indoor and outdoor unit

24 Outdoor Unit

Solo

24 Outdoor Unit

Solo

- Heat Pump

Ú Refrigerant pipe length

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

• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose.

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

• The difference between the indoor unit pipe length can occur the difference in performance.

Y branch Header Y branch/ Header

L Longest pipe length A+B+C+D+e ≤ 100 m A+f ≤ 100 m

A+B+b ≤ 100 m

A+B+e ≤ 100 m

ℓ

Longest pipe length after 1st branch 40 m 40 m 40 m

Difference in height (Outdoor unit ÷ Indoor unit)

50 m 50 m 50 m

Difference in height (Indoor unit ÷ Indoor unit)

15 m 15 m 15 m

LTotal Total pipe length Equivalent pipe length 150 m 170 m 150 m 170 m 150 m 170 m

Outdoor unit Total capacity

[kW (Btu/h)]

Standard pipe Diameter

Liquid pipe[mm (inch)] Gas pipe[mm (inch)]

22.4 (76,400)

9.52 (3/8)

19.05 (3/4)

28.0 (95,900)

9.52 (3/8)

22.2 (7/8)

33.6 (172,000)

12.7 (1/2)

25.58 (1 1/8)

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

Downward Indoor Unit total capacity

[kW(Btu/h)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8) ≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) < 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8) < 50.4(172,000) Ø12.7(1/2) Ø28.58(11/8 )

Liquid pipe [mm(inch)] Gas pipe [mm(inch)]

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 130% is connected to 28kW outdoor unit.

1) Outdoor unit main pipe diameter A : Ø22.2(Gas pipe), Ø9.52(Liquid pipe)

2) Pipe diameter B after first branch according to 130% indoor unit combination (36.4kW) ; Ø28.58(Gas pipe), Ø12.7(Liquid pipe) Therefore, pipe diameter B connected after first branch would be Ø22.2(Gas pipe)/ Ø9.52(Liquid pipe) which is same with main pipe diameter

Indoor Unit Connection

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

Indoor Unit capacity [kW(Btu/h)]

≤ 5.6(19,100)

< 16.0(54,600)

≤ 22.4(76,400)

Ø6.35(1/4)

Ø9.52(3/8)

Ø12.7(1/2)

Ø15.88(5/8)

Ø19.05(3/4)

Liquid pipe [mm(inch)]

Gas pipe

[mm(inch)]

Pipe connections between indoor and outdoor unit

ENGLISH

Installation Manual 25

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.

Additional charge(kg)

Total liquid pipe

:Ø12.7 mm

Total liquid pipe

:Ø9.52 mm

Total liquid pipe

:Ø6.35 mm

CF value of indoor unit

CAUTION

Use only 2-series of indoor unit. Ex) ARNU***2

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

Ceiling concealed Duct 7.3kW-2ea Wall Mounted 2.3kW-4ea

CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg

CF value of indoor unit (unit : kg)

Capacity(Btu/h(kW)) 5k 7k 9k 12k 15k 18k 24k 28k 36k 42k 48k 76k 96k

Type (1.6) (2.2) (2.8) (3.6) (4.5) (5.6) (7.1) (8.2) (10.6) (12.3) (14.1) (22.4) (28.0)

Ceiling Concealed Duct (Low Static) - 0.17 0.17 0.17 0.17 0.37 0.37 ------

Ceiling Concealed Duct (High Static) - 0.26 0.26 0.26 0.26 0.26 0.26 0.44 0.44 0.44 0.62 1.00 1.00

Wall Mounted - 0.24 0.24 0.24 0.24 0.28 0.28 ------

1Way Ceiling Cassette - 0.20 0.20 0.20 - 0.29 0.29 ------

2Way Ceiling Cassette -----0.16 0.16 ------

4Way Ceiling Cassette 0.18 0.18 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64 - -

ARTCOOL Gallery - 0.10 0.10 0.10 ---------

Floor Standing - 0.17 0.17 0.17 0.17 0.37 0.37 ------

Ceiling & Floor - - 0.10 0.10 ---------

Ceiling Suspended -----0.35 0.35 - 0.54 - 0.75 - -

Console - 0.17 0.17 0.17 0.17 --------

Heat recovery ventilator(DX)

0.20

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