LG ARUN50LL2 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.

MODELS: ARUV Series

ARUN Series

www.lg.com

P/NO : MFL46912305

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ARUV/ARUN Series Outdoor unit Installation Manual

TABLE OF CONTENTS

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 ............................................................................	17
Electrical Wiring ...................................................................................................	35
Test Run ................................................................................................................	48
Caution For Refrigerant Leak..............................................................................	56
Installation guide at the seaside.........................................................................	58

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.

νIncorrect 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.

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

Be sure not to do.

Be sure to follow the instruction.

ν 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 and fire may result.

Always ground the product.

•There is risk of fire or electric shock.

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 intstall a dedicated circuit and breaker.

•Improper wiring or installation may cause fire or electric shock.

For re-installation of the installed product,	Do not install, remove, or re-install the unit
always contact a dealer or an Authorized	by yourself (customer).
Service Center.
• There is risk of fire, electric shock, explosion, or	• There is risk of fire, electric shock, explosion, or
injury.	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 typhoons and other strong winds and earthquakes and install the unit at the specified place.

•Improper installation may cause the unit to topple and result in 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.

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Installation Manual 3

Safety Precautions

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

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

Ventilate before operating air conditioner when gas goes out.

•It may cause explosion, fire, and burn.

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.

Securely install the cover of control box and the panel.

•If the cover and panel are 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.

■ 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.

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

•There is risk of fire or electric shock.

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 touch the power switch with wet hands.

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

Be cautious not to touch the sharp edges when installing.

•It may cause injury.

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

ν Installation

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

•Low refrigerant levels may cause failure of product.

Keep level even when installing the product.

•To avoid vibration or water leakage.

Use power cables of sufficient current carrying capacity and rating.

•Cables that are too small may leak, generate heat, and 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.

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.

Do not install the unit where combustible gas may leak.

•If the gas leaks and accumulates around the unit, an explosion may result.

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.

When installting the unit in a hospital, communication station, or similar place, provide surfficient 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 will be 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.

ν 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 is not applied to the terminals.

•Inadequate connection and fastening may generate heat and cause a fire.

Do not block the inlet or outlet.

•It may cause failure of appliance or accident.

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, and personal injury.

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Installation Manual 5

Safety Precautions

Install and insulate the drain hose to ensure	Do not operate with "System louver" closed.
that water is drained away properly based on
the installation manual.
• A bad connection may cause water leakage.	• It may cause failure of appliance or accident.

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 mails and other metal or wooden parts, may cause stabs or other injuries.

•Tear apart and throw away plastic packaging bags so that children will 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 and 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 more than 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.

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 board(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.

6 Outdoor Unit

Installation

Installation Process

Determination of division work

Indicate clearly who is to be responsible for switch settings

Make relationship between outdoor, indoor, remote controller, and option connections clear.

Preparation of contract drawings

(Prepare control circuit diagram)

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)

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)

Outdoor unit foundation work

The foundation must be level even

Installation of outdoor unit

Avoid short circuits and ensure sufficient space is allowed for service

Airtight test

Vacuum drying

Additional charge of refrigerant

Fit facing panels

Automatic addressing of indoor unit

Test run adjustment

Transfer to customer with explanation

In the final check for 24hours at 3.8 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

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

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•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.)

Installation Manual 7

Outdoor units Information

Outdoor units Information

CAUTION: Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130% Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100%

A combination operation over 100% cause to reduce the total capacity.

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

ν Heat Pump

		Model		ARUN50LR2	ARUN60LR2	ARUN80LR2
				ARUN50LL2	ARUN60LL2	ARUN80LL2
	HP(Equivalent horsepower)			5	6	8
		Chassis		UV	UV	UV
	Refrigerant	Product charge	kg	5.2	5.2	6.4
		CF(Correction Factor)	kg	0	0	0
	Max. Connectable No. of Indoor Units			8	9	13
	Net Weight		kg	200	200	200
	Dimensions (WxHxD)		mm	750x1,790x650	750x1,790x650	750x1,790x650
			inch	29.5x70.5x25.6	29.5x70.5x25.6	29.5x70.5x25.6
	Connecting Pipes	Liquid Pipes	[mm(inch)]	9.52(3/8)	9.52(3/8)	9.52(3/8)
		Gas Pipes	[mm(inch)]	15.88(5/8)	19.05(3/4)	19.05(3/4)
	ν Cooling Only

		Model		ARUV80LR2	ARUV100LR2
				ARUV80LL2	ARUV100LL2
	HP(Equivalent horsepower)			8	10
		Chassis		UV1	UV
	Refrigerant	Product charge	kg	4.5	5.1
		CF(Correction Factor)	kg	0	0
	Max. Connectable No. of Indoor Units			13	16
	Net Weight		kg	175	190
	Dimensions (WxHxD)		mm	750 x 1,790 x 495	750x1,790x650
			inch	29.5 x 70.5 x 19.5	29.5x70.5x25.6
	Connecting Pipes	Liquid Pipes	[mm(inch)]	9.52(3/8)	9.52(3/8)
		Gas Pipes	[mm(inch)]	19.05(3/4)	22.2(7/8)

Connectable Indoor Unit

should be connected with "2 series" indoor unit only.

Ex) ARNU07GSEA2

8 Outdoor Unit

Environment-friendly Alternative Refrigerant R410A

	Environment-friendly Alternative Refrigerant R410A
	• The refrigerant R410A has the property of higher operating pressure in comparison with R22.	<![if ! IE]> <![endif]>ENGLISH
	Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this character-
	istic 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 environmental-friendly refrigerant and encour-
	aged to use it widely to prevent environmental pollution.

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 up pipes more than its necessity to prevent them from softening.

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

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 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 unit to the space where generation, inflow, stagnation, and leak 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 (neare 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 water gathers since the floor is not even.

Installation Manual 9

Installation Space

Installation Space

	UV : 1150
	UV1 : 995
	500
<![if ! IE]> <![endif]>(+5)	<![if ! IE]> <![endif]>100 (Min)
<![if ! IE]> <![endif]>884	<![if ! IE]> <![endif]>650
<![if ! IE]> <![endif]>(Min)	<![if ! IE]> <![endif]>*
	<![if ! IE]> <![endif]>100 (Min)
	Door Width
	UV : 900
	UV1 : 745

	<![if ! IE]> <![endif]>(600)
	<![if ! IE]> <![endif]>676
<![if ! IE]> <![endif]>(Min) 1605 (+5)	<![if ! IE]> <![endif]>1024
	<![if ! IE]> <![endif]>90

660	(Unit : mm)
	<![if ! IE]> <![endif]>40
	<![if ! IE]> <![endif]>596
	<![if ! IE]> <![endif]>65
	<![if ! IE]> <![endif]>954
	<![if ! IE]> <![endif]>137
723(Anchor Bolt)
750

•Space for the "*" display part of by type of system louver When installing automatic louver: 150

When installing manual louver: 150

When installing fixed louver: 100 (Basic space)

•Please install the product so that the door of the outdoor unit room is completely opened for smooth installation and service.

Drain hole

Drain pipe

•A water drain outlet is required to discharge rain water on the bottom of the outdoor unit room or condensation water to possibly generate when operating.

•The recommended Specification of louver

660mm

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CAUTION:

Do not use bended louver like the above Fig. It disturbs the air circulation.

• Multi V Space should be installed in the special outdoor room with soundproofing walls.

10 Outdoor Unit

Installation Space

Recommended Effective Opening Ratio(E.O.R) of Louver

W

θ

h

θ ho

H

• ho = h * COSθ
• Total Area(A)	= H * W
• Effective Area(Af)	= ho * W * N
• Opening Ratio(n)	= Af/A
→ Af = A * n
		N
	Af
	Af	X 100
E.O.R(%) =
	Ad + As
	Ad + As	E.O.R > 120%
Air Flow Rate Q = Discharge Area(Ad) * Discharge air velocity
Air Flow Rate Q = Suction Area(As) * Suction air velocity

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 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.

•Don't install the suction hole and discharge hole of the outdoor unit facing to the seasonal wind.

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Installation Manual 11

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

B Rope suspension point

WARNING

CAUTION

Be very careful to carry 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.

12 Outdoor Unit

Installation

Installation

Location of anchor bolt

ν Installation foot (Location of anchor bolt)

(Unit : mm)

723

516 : 362 UV : UV1

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 (Anti-vibration pad) fully (The base pad shall be more than 200mm).

	Spring washer		Anti-vibration
				materials
	Frame	Nut	Concrete	Four bolt are
			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

AEnsure that the corner part can be securely mounted. Otherwise, the support for installation may be bent.

B Obtain and use the M10 anchor bolt.

C The corner was not properly mounted.

DOutdoor unit (Insert the cushion pad between outdoor unit and base support to ensure that anti-vibration may be done in a wide area)

GE Pipe and wiring space (in case of piping and wiring on the floor surface)

F H-Beam support

G Concrete base support

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 not be done due to freezing of a tube or pipe.

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Installation Manual 13

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.

νUse the accessory piping kit or the pipes purchased locally.

νMeasure the distance between the indoor and the outdoor unit.

νCut the pipes a little longer than measured distance.

νCut the cable 1.5m longer than the pipe length.

2)Burrs removal

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

νPut 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

νCarry out flaring work using flaring tool as shown below.

Indoor unit		Pipe		" A " (mm)
[kW(Btu/h]	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

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

4)Check

νCompare the flared work with figure below.

νIf 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

14 Outdoor Unit

			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				<![if ! IE]> <![endif]>ENGLISH
pipe size	tightening torque(N.m)	A(mm)	flare shape
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.
Ø9.5	3.27~3.99	12.8~13.2	90° ±2
			45
			°±2
Ø12.7	4.95~6.30	16.2~16.6	A
			R=0.4~0.8
Ø15.9	6.18~7.54	19.3~19.7

CAUTION

•Always use a charge hose for service port connection.

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

present.

Union

•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

Shutoff		Tightening torque (N.m)(Turn clockwise to close)
valve size	Shaft(valve body)		Cap(Valve lid)	Service port	Flare nut	Gas line piping attached to unit
Ø6.4	5.4~6.6	Hexagonal	13.5~16.5		14~17
Ø9.5					33~39
		wrench 4mm
Ø12.7	8.1~9.9		18~22		50~60	-
Ø15.9	13.5~16.5	Hexagonal	23~27	11.5-13.9	62~75
		wrench 6mm
Ø22.2	27-33	Hexagonal	36~44		-	22~28
Ø25.4		wrench 10mm

Installation Manual 15

Indoor 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

"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.

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

16 Outdoor Unit

Refrigerant piping installation

Refrigerant piping installation

WARNING

Always use extreme care to prevent the refrigerant gas (R410A) from 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.

CLOSE

OPEN

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.

Cap: Remove caps and operate valve, etc. After operation, always reattach caps (tightening torque of valve cap: 25N.m (250kgf.cm) or more). (Don't remove the internal part of the port)

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: 14N.m (140kgf.cm) or more).

Liquid pipe	Ball Valve(Liquid Pipe)	Ball Valve(Gas Pipe)
		≥ 22.2 : brazing type
Gas pipe
		≤19.05 : flare type

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<![endif]>ENGLISH

Installation Manual 17

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			Header
			4 branch	7 branch	10 branch
ARBLN01621		ARBLN03321	ARBL054	ARBL057	ARBL1010

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.)

A

A

B

A To Outdoor Unit

BSealed Piping

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 using a vacuum pump.

18 Outdoor Unit