LG ARWB120LAS4 INSTALLATION MANUAL

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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.

Original instruction

www.lg.com

P/NO : MFL68100326

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<![if ! IE]> <![endif]>ENGLISH	TIPS FOR SAVING ENERGY
	Here are some tips that will help you minimize the power consumption
	when you use the air conditioner. You can use your air conditioner
	more efficiently by referring to the instructions below:

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

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

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

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

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

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

For your records

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

Model number :

Serial number :

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

Dealer’s name :

Date of purchase :

IMPORTANT SAFETY

INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.

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

! WARNING

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

! CAUTION

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

! WARNING

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

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

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

Installation

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

-If the power source capacity is inadequate or electric work is performed improperly, electric shock or fire may result.

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

-Improper installation by the user may result in water leakage, electric shock, or fire.

•Always ground the product.

-There is risk of fire or electric shock.

•Always intstall a dedicated circuit and breaker.

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

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

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

•Do not 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.

•Do not install the unit at the outdoors.

-Otherwise it may cause fire, electric shock and trouble.

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

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

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

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

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

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

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

-If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

•Ventilate before operating air conditioner when gas leaked out.

-It may cause explosion, fire, and burn.

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

-If the cover and panel are not installed securely, dust or water may enter the outside 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.

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 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 outside unit .

-This could result in personal injury and product damage.

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

-There is risk of physical injury, electric shock, or product failure.

! CAUTION

Installation

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

-Low refrigerant levels may cause failure of product.

•Do not install the product where the noise or hot air from the outside 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.

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

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

Operation

•Do not use the air conditioner in special environments.

-Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.

•Do not block the inlet or outlet.

-It may cause failure of appliance or accident.

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

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

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

-If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or personal injury.

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

-A bad connection may cause water leakage.

•Be very careful about product transportation.

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

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

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

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

•Safely dispose of the packing materials.

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

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

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

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

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

-It can cause a burn or frostbite.

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

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

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

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

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

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

-Be careful and avoid personal injury.

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TABLE OF CONTENTS

2TIPS FOR SAVING ENERGY

2IMPORTANT SAFETY INSTRUCTIONS

4INSTALLATION PROCESS

4OUTSIDE UNITS INFORMATION

6ALTERNATIVE REFRIGERANT R410A

6SELECT THE BEST LOCATION

8INSTALLATION SPACE

8WATER CONTROL

9LIFTING METHOD

9INSTALLATION

12 REFRIGERANT PIPING INSTALLATION

15 INSTALLATION OF WATER PIPE

15DEVICE PROTECTION UNIT

16PIPE CONNECTIONS BETWEEN INDOOR AND OUTSIDE UNIT

24 ELECTRICAL WIRING

29 HR UNIT PCB

37 TEST RUN

41CAUTION FOR REFRIGERANT LEAK

42COOLING TOWER APPLIED METHOD

42WATER SOLENOID VALVE CONTROL

43INSTALLATION GUIDE FOR HARMONICS AND FLICKER

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INSTALLATION PROCESS

	Determination of division work		Indicate clearly who will be responsible for switch setting.
	Preparation of contract drawings		Make connection clearly between outside, indoor,
			remote controller and option.

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

Outside unit foundation work

of drain piping

The foundation must be level even

Check model name to

make sure the fitting Installation of outside unit is made correctly

Avoid short circuits and ensure sufficient space is allowed for service

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)

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 an make sure all relevant documentation is 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.

•The 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.)

OUTSIDE UNITS INFORMATION

!CAUTION

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

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

Combination Ratio(50~200%)

Outside Unit Number	Connection Ratio
Single outside unit s	200%
Double outside unit s	160%
More than Triple outside unit s	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.

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

•If the operation of indoor unit is more than 130%, additional refrigerant is needed according to the Aheadquarter guidance.

•Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input.

Power Supply : 3Ø, 380V, 60Hz or 3Ø, 380 - 415V, 50Hz Model Name : ARWB***LAS4

	Unit				1 Unit
	System Capacity (HP)			8	10			12
	Model	Combination Unit		ARWB080LAS4	ARWB100LAS4			ARWB120LAS4
		Independent Unit		ARWB080LAS4	ARWB100LAS4			ARWB120LAS4
	Refrigerant Precharged Amount		kg	5.8	5.8			5.8
	Maximum Connectable Number of Indoor Units			13	16			20
	Net Weight		kg	127 x 1	127 x 1			127 x 1
			lbs	280 x 1	280 x 1			280 x 1
	Dimensions(WxHxD)		mm	755 × 997 × 500	755 × 997 × 500			755 × 997 × 500
			inch	(29-23/32 x 39-1/4 x 19-11/16) x 1	(29-23/32 x 39-1/4 x 19-11/16) x 1			(29-23/32 x 39-1/4 x 19-11/16) x 1
		Liquid Pipes	mm(inch)	9.52(3/8)	9.52(3/8)			12.7(1/2)
	Refrigerant	Low Pressure	mm(inch)	22.7(7/8)	22.7(7/8)			25.4(1)
	Connecting Pipes	Gas Pipes
		High Pressure	mm(inch)	19.05(3/4)	19.05(3/4)			19.05(3/4)
		Gas Pipes
	Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
		Outlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
	ing Pipes
		Drain Outlet	mm	PT20(External thread)	PT20(External thread)			PT20(External thread)
	Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
	Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
	Unit				1 Unit
	System Capacity (HP)			14				16
	Model	Combination Unit		ARWB140LAS4			ARWB160LAS4
		Independent Unit		ARWB140LAS4			ARWB160LAS4
	Refrigerant Precharged Amount		kg	5.8				3
	Maximum Connectable Number of Indoor Units			23				26
	Net Weight		kg	127 x 1				140 x 1
			lbs	280 x 1				309 x 1
	Dimensions(WxHxD)		mm	755 × 997 × 500			755 × 997 × 500
			inch	(29-23/32 x 39-1/4 x 19-11/16) x 1			(29-23/32 x 39-1/4 x 19-11/16) x 1
		Liquid Pipes	mm(inch)	12.7(1/2)				12.7(1/2)
	Refrigerant	Low Pressure	mm(inch)	25.4(1)				28.58(1-1/8)
	Connecting Pipes	Gas Pipes
		High Pressure	mm(inch)	19.05(3/4)				19.05(3/4)
		Gas Pipes
	Water Connect-	Inlet	mm	PT40(Internal thread)			PT40(Internal thread)
		Outlet	mm	PT40(Internal thread)			PT40(Internal thread)
	ing Pipes
		Drain Outlet	mm	PT20(External thread)			PT20(External thread)
	Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
	Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
	Unit				1 Unit
	System Capacity (HP)			18				20
	Model	Combination Unit		ARWB180LAS4			ARWB200LAS4
		Independent Unit		ARWB180LAS4			ARWB200LAS4
	Refrigerant Precharged Amount		kg	3				3
	Maximum Connectable Number of Indoor Units			29				32
	Net Weight		kg	140 x 1				140 x 1
			lbs	309 x 1				309 x 1
	Dimensions(WxHxD)		mm	755 × 997 × 500			755 × 997 × 500
			inch	(29-23/32 x 39-1/4 x 19-11/16) x 1			(29-23/32 x 39-1/4 x 19-11/16) x 1
		Liquid Pipes	mm(inch)	12.7(1/2)				12.7(1/2)
	Refrigerant	Low Pressure	mm(inch)	28.58(1-1/8)				28.58(1-1/8)
	Connecting Pipes	Gas Pipes
		High Pressure	mm(inch)	19.05(3/4)				19.05(3/4)
		Gas Pipes
	Water Connect-	Inlet	mm	PT40(Internal thread)			PT40(Internal thread)
		Outlet	mm	PT40(Internal thread)			PT40(Internal thread)
	ing Pipes
		Drain Outlet	mm	PT20(External thread)			PT20(External thread)
	Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
	Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
	Unit				2 Unit
	System Capacity (HP)			22	24			26
		Combination Unit		ARWB220LAS4	ARWB240LAS4			ARWB260LAS4
	Model	Independent Unit		ARWB120LAS4	ARWB120LAS4			ARWB140LAS4
				ARWB100LAS4	ARWB120LAS4			ARWB120LAS4
	Refrigerant Precharged Amount		kg	5.8 + 5.8	5.8 + 5.8			5.8 + 5.8
	Maximum Connectable Number of Indoor Units			35	39			42
	Net Weight		kg	127 x 2	127 x 2			127 x 2
			lbs	280 x 2	280 x 2			280 x 2
	Dimensions(WxHxD)		mm	(755 × 997 × 500) x 2	(755 × 997 × 500) x 2			(755 × 997 × 500) x 2
			inch	(29-23/32 x 39-1/4 x 19-11/16) x 2	(29-23/32 x 39-1/4 x 19-11/16) x 2			(29-23/32 x 39-1/4 x 19-11/16) x 2
		Liquid Pipes	mm(inch)	19.05(3/4)	19.05(3/4)			19.05(3/4)
	Refrigerant	Low Pressure	mm(inch)	34.9(1-3/8)	34.9(1-3/8)			34.9(1-3/8)
	Connecting Pipes	Gas Pipes
		High Pressure	mm(inch)	28.58(1-1/8)	28.58(1-1/8)			28.58(1-1/8)
		Gas Pipes
	Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
		Outlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
	ing Pipes
		Drain Outlet	mm	PT20(External thread)	PT20(External thread)			PT20(External thread)
	Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
	Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)

Unit				2 Unit
System Capacity (HP)			28	30			32
	Combination Unit		ARWB280LAS4	ARWB300LAS4			ARWB320LAS4
Model	Independent Unit		ARWB140LAS4	ARWB160LAS4			ARWB180LAS4
			ARWB140LAS4	ARWB140LAS4			ARWB140LAS4
Refrigerant Precharged Amount		kg	5.8 + 5.8	3.0 + 5.8			3.0 + 5.8
Maximum Connectable Number of Indoor Units			45	49			52
Net Weight		kg	127 x 2	(140 x 1) + (127 x 1)			(140 x 1) + (127 x 1)
		lbs	280 x 2	(309 x 1) + (280 x 1)			(309 x 1) + (280 x 1)
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 2	(755 × 997 × 500) x 2			(755 × 997 × 500) x 2
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 2	(29-23/32 x 39-1/4 x 19-11/16) x 2			(29-23/32 x 39-1/4 x 19-11/16) x 2
	Liquid Pipes	mm(inch)	19.05(3/4)	19.05(3/4)			19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	34.9(1-3/8)	34.9(1-3/8)			34.9(1-3/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	28.58(1-1/8)	28.58(1-1/8)			28.58(1-1/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)	PT20(External thread)			PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
Unit				2 Unit
System Capacity (HP)			34				36
Model	Combination Unit		ARWB340LAS4			ARWB360LAS4
	Independent Unit		ARWB200LAS4			ARWB180LAS4
			ARWB140LAS4			ARWB180LAS4
Refrigerant Precharged Amount		kg	3.0 + 5.8				3.0 + 3.0
Maximum Connectable Number of Indoor Units			55				58
Net Weight		kg	(140 x 1) + (127 x 1)				140 x 2
		lbs	(309 x 1) + (280 x 1)				309 x 2
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 2			(755 × 997 × 500) x 2
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 2			(29-23/32 x 39-1/4 x 19-11/16) x 2
	Liquid Pipes	mm(inch)	19.05(3/4)				19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	34.9(1-3/8)				41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	28.58(1-1/8)				34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)			PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)			PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)			PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
Unit				2 Unit
System Capacity (HP)			38				40
Model	Combination Unit		ARWB380LAS4			ARWB400LAS4
	Independent Unit		ARWB200LAS4			ARWB200LAS4
			ARWB180LAS4			ARWB200LAS4
Refrigerant Precharged Amount		kg	3.0 + 3.0				3.0 + 3.0
Maximum Connectable Number of Indoor Units			61				64
Net Weight		kg	140 x 2				140 x 2
		lbs	309 x 2				309 x 2
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 2			(755 × 997 × 500) x 2
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 2			(29-23/32 x 39-1/4 x 19-11/16) x 2
	Liquid Pipes	mm(inch)	19.05(3/4)				19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	41.3(1-5/8)				41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	34.9(1-3/8)				34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)			PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)			PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)			PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)
Unit				3 Unit
System Capacity (HP)			42	44			46
	Combination Unit		ARWB420LAS4	ARWB440LAS4			ARWB460LAS4
Model			ARWB200LAS4	ARWB200LAS4			ARWB200LAS4
	Independent Unit		ARWB120LAS4	ARWB120LAS4			ARWB140LAS4
			ARWB100LAS4	ARWB120LAS4			ARWB120LAS4
Refrigerant Precharged Amount		kg	3.0 + 5.8 + 5.8	3.0 + 5.8 + 5.8			3.0 + 5.8 + 5.8
Maximum Connectable Number of Indoor Units			64	64			64
Net Weight		kg	(140 x 1) + (127 x 2)	(140 x 1) + (127 x 2)			(140 x 1) + (127 x 2)
		lbs	(309 x 1) + (280 x 2)	(309 x 1) + (280 x 2)			(309 x 1) + (280 x 2)
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 3	(755 × 997 × 500) x 3			(755 × 997 × 500) x 3
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 3	(29-23/32 x 39-1/4 x 19-11/16) x 3			(29-23/32 x 39-1/4 x 19-11/16) x 3
	Liquid Pipes	mm(inch)	19.05(3/4)	19.05(3/4)			19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	41.3(1-5/8)	41.3(1-5/8)			41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	34.9(1-3/8)	34.9(1-3/8)			34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)	PT40(Internal thread)			PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)	PT20(External thread)			PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 113°F)			10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 113°F)			-5°C ~ 45°C(23°F ~ 113°F)

						5
									<![if ! IE]> <![endif]>ENGLISH
Refrigerant Precharged Amount		kg	3.0 + 5.8 + 5.8	3.0 + 3.0 + 5.8		3.0 + 3.0 + 5.8
Unit				3 Unit
System Capacity (HP)			48	50		52
	Combination Unit		ARWB480LAS4	ARWB500LAS4		ARWB520LAS4
Model			ARWB200LAS4	ARWB200LAS4		ARWB200LAS4
	Independent Unit		ARWB140LAS4	ARWB160LAS4		ARWB180LAS4
			ARWB140LAS4	ARWB140LAS4		ARWB140LAS4
Maximum Connectable Number of Indoor Units			64	64		64
Net Weight		kg	(140 x 1) + (127 x 2)	(140 x 2) + (127 x 1)		(140 x 2) + (127 x 1)
		lbs	(309 x 1) + (280 x 2)	(309 x 2) + (280 x 1)		(309 x 2) + (280 x 1)
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 3	(755 × 997 × 500) x 3		(755 × 997 × 500) x 3
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 3	(29-23/32 x 39-1/4 x 19-11/16) x 3		(29-23/32 x 39-1/4 x 19-11/16) x 3
	Liquid Pipes	mm(inch)	19.05(3/4)	19.05(3/4)		19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	41.3(1-5/8)	41.3(1-5/8)		41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	34.9(1-3/8)	34.9(1-3/8)		34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)	PT20(External thread)		PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 113°F)		10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 113°F)		-5°C ~ 45°C(23°F ~ 113°F)
Unit				3 Unit
System Capacity (HP)			54			56
	Combination Unit		ARWB540LAS4		ARWB560LAS4
Model	Independent Unit		ARWB200LAS4		ARWB200LAS4
			ARWB200LAS4		ARWB180LAS4
			ARWB140LAS4		ARWB180LAS4
Refrigerant Precharged Amount		kg	3.0 + 3.0 + 5.8		3.0 + 3.0 + 3.0
Maximum Connectable Number of Indoor Units			64			64
Net Weight		kg	(140 x 2) + (127 x 1)			140 x 3
		lbs	(309 x 2) + (280 x 1)			309 x 3
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 3		(755 × 997 × 500) x 3
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 3		(29-23/32 x 39-1/4 x 19-11/16) x 3
	Liquid Pipes	mm(inch)	19.05(3/4)			19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	41.3(1-5/8)			41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	34.9(1-3/8)			34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)		PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)		PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)		PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)		10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)		-5°C ~ 45°C(23°F ~ 113°F)
Unit				3 Unit
System Capacity (HP)			58			60
	Combination Unit		ARWB580LAS4		ARWB600LAS4
Model	Independent Unit		ARWB200LAS4		ARWB200LAS4
			ARWB200LAS4		ARWB200LAS4
			ARWB180LAS4		ARWB200LAS4
Refrigerant Precharged Amount		kg	3.0 + 3.0 + 3.0		3.0 + 3.0 + 3.0
Maximum Connectable Number of Indoor Units			64			64
Net Weight		kg	140 x 3			140 x 3
		lbs	309 x 3			309 x 3
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 3		(755 × 997 × 500) x 3
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 3		(29-23/32 x 39-1/4 x 19-11/16) x 3
	Liquid Pipes	mm(inch)	19.05(3/4)			19.05(3/4)
Refrigerant	Low Pressure	mm(inch)	41.3(1-5/8)			41.3(1-5/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	34.9(1-3/8)			34.9(1-3/8)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)		PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)		PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)		PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)		10°C ~ 45°C(50°F ~ 113°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)		-5°C ~ 45°C(23°F ~ 113°F)
Unit				4 Unit
System Capacity (HP)			62	64		66
	Combination Unit		ARWB620LAS4	ARWB640LAS4		ARWB660LAS4
			ARWB200LAS4	ARWB200LAS4		ARWB200LAS4
Model	Independent Unit		ARWB200LAS4	ARWB200LAS4		ARWB200LAS4
			ARWB120LAS4	ARWB120LAS4		ARWB140LAS4
			ARWB100LAS4	ARWB120LAS4		ARWB120LAS4
Refrigerant Precharged Amount		kg	3.0 + 3.0 + 5.8 + 5.8	3.0 + 3.0 + 5.8 + 5.8		3.0 + 3.0 + 5.8 + 5.8
Maximum Connectable Number of Indoor Units			64	64		64
Net Weight		kg	(140 x 2) + (127 x 2)	(140 x 2) + (127 x 2)		(140 x 2) + (127 x 2)
		lbs	(309 x 2) + (280 x 2)	(309 x 2) + (280 x 2)		(309 x 2) + (280 x 2)
Dimensions(WxHxD)		mm	(755 × 997 × 500) x 4	(755 × 997 × 500) x 4		(755 × 997 × 500) x 4
		inch	(29-23/32 x 39-1/4 x 19-11/16) x 4	(29-23/32 x 39-1/4 x 19-11/16) x 4		(29-23/32 x 39-1/4 x 19-11/16) x 4
	Liquid Pipes	mm(inch)	22.2(7/8)	22.2(7/8)		22.2(7/8)
Refrigerant	Low Pressure	mm(inch)	44.5(1-3/4)	44.5(1-3/4)		53.98(2-1/8)
Connecting Pipes	Gas Pipes
	High Pressure	mm(inch)	41.3(1-5/8)	41.3(1-5/8)		44.5(1-3/4)
	Gas Pipes
Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
	Outlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
ing Pipes
	Drain Outlet	mm	PT20(External thread)	PT20(External thread)		PT20(External thread)
Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 113°F)	10°C ~ 45°C(50°F ~ 114°F)		10°C ~ 45°C(50°F ~ 115°F)
Circulation water	Heating		-5°C ~ 45°C(23°F ~ 113°F)	-5°C ~ 45°C(23°F ~ 114°F)		-5°C ~ 45°C(23°F ~ 115°F)

6

<![if ! IE]> <![endif]>ENGLISH
		Unit				4 Unit
		System Capacity (HP)			68		70	72
			Combination Unit		ARWB680LAS4	ARWB700LAS4		ARWB720LAS4
					ARWB200LAS4	ARWB200LAS4		ARWB200LAS4
		Model	Independent Unit		ARWB200LAS4	ARWB200LAS4		ARWB200LAS4
					ARWB140LAS4	ARWB160LAS4		ARWB180LAS4
					ARWB140LAS4	ARWB140LAS4		ARWB140LAS4
		Refrigerant Precharged Amount		kg	3.0 + 3.0 + 5.8 + 5.8	3.0 + 3.0 + 3.0 + 5.8		3.0 + 3.0 + 3.0 + 5.8
		Maximum Connectable Number of Indoor Units			64		64	64
		Net Weight		kg	(140 x 2) + (127 x 2)	(140 x 3) + (127 x 1)		(140 x 3) + (127 x 1)
				lbs	(309 x 2) + (280 x 2)	(309 x 3) + (280 x 1)		(309 x 3) + (280 x 1)
		Dimensions(WxHxD)		mm	(755 × 997 × 500) x 4	(755 × 997 × 500) x 4		(755 × 997 × 500) x 4
				inch	(29-23/32 x 39-1/4 x 19-11/16) x 4	(29-23/32 x 39-1/4 x 19-11/16) x 4		(29-23/32 x 39-1/4 x 19-11/16) x 4
			Liquid Pipes	mm(inch)	22.2(7/8)	22.2(7/8)		22.2(7/8)
		Refrigerant	Low Pressure	mm(inch)	53.98(2-1/8)	53.98(2-1/8)		53.98(2-1/8)
		Connecting Pipes	Gas Pipes
			High Pressure	mm(inch)	44.5(1-3/4)	44.5(1-3/4)		44.5(1-3/4)
			Gas Pipes
		Water Connect-	Inlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
			Outlet	mm	PT40(Internal thread)	PT40(Internal thread)		PT40(Internal thread)
		ing Pipes
			Drain Outlet	mm	PT20(External thread)	PT20(External thread)		PT20(External thread)
		Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 116°F)	10°C ~ 45°C(50°F ~ 117°F)		10°C ~ 45°C(50°F ~ 118°F)
		Circulation water	Heating		-5°C ~ 45°C(23°F ~ 116°F)	-5°C ~ 45°C(23°F ~ 117°F)		-5°C ~ 45°C(23°F ~ 118°F)
		Unit				4 Unit
		System Capacity (HP)			74			76
			Combination Unit		ARWB740LAS4		ARWB760LAS4
		Model			ARWB200LAS4		ARWB200LAS4
			Independent Unit		ARWB200LAS4		ARWB200LAS4
					ARWB200LAS4		ARWB180LAS4
					ARWB140LAS4		ARWB180LAS4
		Refrigerant Precharged Amount		kg	3.0 + 3.0 + 3.0 + 5.8		3.0 + 3.0 + 3.0 + 3.0
		Maximum Connectable Number of Indoor Units			64			64
		Net Weight		kg	(140 x 3) + (127 x 1)			140 x 4
				lbs	(309 x 3) + (280 x 1)			309 x 4
		Dimensions(WxHxD)		mm	(755 × 997 × 500) x 4		(755 × 997 × 500) x 4
				inch	(29-23/32 x 39-1/4 x 19-11/16) x 4		(29-23/32 x 39-1/4 x 19-11/16) x 4
			Liquid Pipes	mm(inch)	22.2(7/8)			22.2(7/8)
		Refrigerant	Low Pressure	mm(inch)	53.98(2-1/8)		53.98(2-1/8)
		Connecting Pipes	Gas Pipes
			High Pressure	mm(inch)	44.5(1-3/4)			44.5(1-3/4)
			Gas Pipes
		Water Connect-	Inlet	mm	PT40(Internal thread)		PT40(Internal thread)
			Outlet	mm	PT40(Internal thread)		PT40(Internal thread)
		ing Pipes
			Drain Outlet	mm	PT20(External thread)		PT20(External thread)
		Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 119°F)		10°C ~ 45°C(50°F ~ 120°F)
		Circulation water	Heating		-5°C ~ 45°C(23°F ~ 119°F)		-5°C ~ 45°C(23°F ~ 120°F)
		Unit				4 Unit
		System Capacity (HP)			78			80
			Combination Unit		ARWB780LAS4		ARWB800LAS4
		Model			ARWB200LAS4		ARWB200LAS4
			Independent Unit		ARWB200LAS4		ARWB200LAS4
					ARWB200LAS4		ARWB200LAS4
					ARWB180LAS4		ARWB200LAS4
		Refrigerant Precharged Amount		kg	3.0 + 3.0 + 3.0 + 3.0		3.0 + 3.0 + 3.0 + 3.0
		Maximum Connectable Number of Indoor Units			64			64
		Net Weight		kg	140 x 4			140 x 4
				lbs	309 x 4			309 x 4
		Dimensions(WxHxD)		mm	(755 × 997 × 500) x 4		(755 × 997 × 500) x 4
				inch	(29-23/32 x 39-1/4 x 19-11/16) x 4		(29-23/32 x 39-1/4 x 19-11/16) x 4
			Liquid Pipes	mm(inch)	22.2(7/8)			22.2(7/8)
		Refrigerant	Low Pressure	mm(inch)	53.98(2-1/8)		53.98(2-1/8)
		Connecting Pipes	Gas Pipes
			High Pressure	mm(inch)	44.5(1-3/4)			44.5(1-3/4)
			Gas Pipes
		Water Connect-	Inlet	mm	PT40(Internal thread)		PT40(Internal thread)
			Outlet	mm	PT40(Internal thread)		PT40(Internal thread)
		ing Pipes
			Drain Outlet	mm	PT20(External thread)		PT20(External thread)
		Temp. range of	Cooling		10°C ~ 45°C(50°F ~ 121°F)		10°C ~ 45°C(50°F ~ 122°F)
		Circulation water	Heating		-5°C ~ 45°C(23°F ~ 121°F)		-5°C ~ 45°C(23°F ~ 122°F)

ALTERNATIVE REFRIGERANT R410A

The refrigerant R410A has the property of higher operating pressure in comparison with R22.

Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should 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.

!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.

SELECT THE BEST LOCATION

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

-With strength which bears weight of unit

-With space for air passage and service work

Don't install the unit at 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.

-Location with no leakage of combustible gas

-Recommend the outside unit to be installed within 0~40°C.

-Location with installation or service work space (Refer to required space)

-Do not use the outside unit under any special environment where oil, steam and sulfuric gas exist.

-Install in a separate machine room not exposed to external air Establish an anti-freeze plan for the water supply when the product is stopped during the winter.

Install the product so that the noise from the machine room is not transferred outsides

-The floor of the machine room must be water proof.

-Drainage must be installed in the machine room to process the water drainage.

-Install a floor slope to make the drainage smooth.

-Avoid installing the outside unit in the location with following conditions.

-Location where corrosive gas such as acidic gas is generated. (It may cause the refrigerant leakage by corrosion of the pipe.)

-Location where electromagnetic waves happen.

(It may cause the abnormal operation by control parts disorder.)

-Location to be able to leak the combustible gas

-Location with carbon fiber or combustible dust.

-Location with the combustible material like thinner or gasoline. (It may cause a fire by leaking the gas near the product.)

!CAUTION

•Do not install Multi V water outdoors. Always install indoor like machine room.

•Inverter product may generate electric noise. Keep the body from computer, stereo etc. at enough distance. Specially leave space from indoor remote controller to shoes electric devices at the above 3m in weak electric wave area. Insert the power cable and other wire into separate conduit.

100 more (Serviceing space)

300more	450more
(Servicing space)	(Servicing space)

7

<![if ! IE]>

<![endif]>ENGLISH

Select installation location of the HR unit suitable for following conditions

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

-Sufficient service space must be obtained.

-Refrigerant pipe must not exceed limited length.

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

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

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

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

481

7

<![if ! IE]> <![endif]>345

1

2

3

<![if ! IE]>

<![endif]>450

Inspection door (servicing space)

450

<![if ! IE]> <![endif]>218		<![if ! IE]> <![endif]>182
(174)	453	(174)

	124	4	5
<![if ! IE]> <![endif]>128
			<![if ! IE]> <![endif]>60
61	419	(137)	<![if ! IE]> <![endif]>30

6

				(Unit: mm)
	No.	Part Name	Description
			PRHR041/031	PRHR021
	1	Low pressure Gas	Ø28.58 Brazing con-	Ø22.2 Brazing con-
		pipe connection port	nection	nection
	2	High pressure Gas	Ø22.2 Brazing con-	Ø19.05 Brazing con-
		pipe connection port	nection	nection
			Ø15.88 Brazing con-
	3	Liquid pipe connec-	nection(PRHR041)	Ø9.52 Brazing con-
		tion port	Ø12.7 Brazing con-	nection
			nection(PRHR031)
	4	Indoor unit Gas pipe	Ø15.88 Brazing con-	Ø15.88 Brazing con-
		connection port	nection	nection
	5	Indoor unit Liquid	Ø9.52 Brazing con-	Ø9.52 Brazing con-
		pipe connection port	nection	nection
	6	Control box	-	-
	7	Hanger metal	M10 or M8	M10 or M8

!NOTE

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

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

100 more (Serviceing space)

300more	300more
(Servicing space)	(Servicing space)

8

<![if ! IE]> <![endif]>ENGLISH	INSTALLATION SPACE
	Individual Installation
	During the installation of the unit, consider service, inlet, and outlet
	acquire the minimum space as shown in the figures below.
	: Service area

		<![if ! IE]> <![endif]>20
	Product	<![if ! IE]> <![endif]>500
Water pipe	(Outside unit)
installation
space
	Service area	<![if ! IE]> <![endif]>600
	(Front)
	350
20	755	100
	<Top View>

(unit : mm)

		<![if ! IE]> <![endif]>100
		<![if ! IE]> <![endif]>997
	H-Beam Support	<![if ! IE]> <![endif]>100
	<Front View>

Collective / Continuous Installation

Space required for collective installation and continuous installation as shown below considering passage for air and people.

: Service area

(Unit : mm)

								<![if ! IE]> <![endif]>20
	Product		Product		Product		Product	<![if ! IE]> <![endif]>500
	(Outside unit)		(Outside unit)		(Outside unit)		(Outside unit)
	Service area		Service area		Service area		Service area	<![if ! IE]> <![endif]>600
	(Front)		(Front)		(Front)		(Front)
	350		350		350		350
20	755	100	755	100	755	100	755	100
				<Top view>

*In case of the water pipe passing side product, please make sufficient service place to avoid occurring between water pipe and product side.

Two Layer Installation

Space required for two layer installation as shown below considering passage for air and people.

: Service area

	(unit : mm)
	<![if ! IE]> <![endif]>997
	<![if ! IE]> <![endif]>100 100
	<![if ! IE]> <![endif]>997
H-Beam Support	<![if ! IE]> <![endif]>100
<Front View>

WATER CONTROL

Water control

-Keep the water temperature between 10~45°C. Other it may cause the breakdown.

Standard water supply temperature is 30°C for Cooling and 20°C for heating.

-Properly control the water velocity. Otherwise it may cause the noise, pipe vibration or pipe contraction, expansion according to the temperature. Use the same water pipe size connected with the product or more.

-Refer to the water source pipe diameter and water velocity table below. As the water velocity is fast, air bubble will increase.

Diameter (mm)	Velocity range (m/s)
< 50	0.6 ~ 1.2
50 ~ 100	1.2 ~ 2.1
100 <	2.1 ~ 2.7

-Be careful of the water purity control. Otherwise it may cause the breakdown due to water pipe corrosion.

(Refer to 'Standard Table for Water Purity Control')

-In case the water temperature is above 40°C, it is good to prevent the corrosion by adding the anticorrosive agent.

-Install the pipe, valve and gauge sensor in the space where it is easy to maintain. Install the water valve in the low position for drain, if required.

-Be careful not to let air in. If so, the water velocity will be unstable in the circulation, pump efficiency will also decrease and may cause the piping vibration. Therefore, install the air purge where it may generate the air.

-Choose the following anti freezing methods. Otherwise, it will be dangerous for the pipe to break in the winter.

Circulate the water with the pump before dropping the temperature.

Keep the normal temperature by boiler.

When the cooling tower is not operated for a long time, drain the water in the cooling tower.

Use an anti-freeze. (For using an anti freeze, change the DIP switch on main PCB in outside unit.)

Refer to the additive amount about freezing temperature as in the table given below.

	Anti freeze type	Minimum temperature for anti freezing (°C)
		0	-5	-10	-15	-20	-25
	Ethylene glycol (%)	0	12	20	30	-	-
	Propylene glycol (%)	0	17	25	33	-	-
	Methanol (%)	0	6	12	16	24	30

-In addition to anti freeze, it may cause the change of the pressure in the water system and the low performance of the product.

-Make sure to use the closed cooling type tower.

When applying the open type cooling tower, use a 2nd heat exchanger to make the water supply system a closed type system.

Standard table for water purity control

The water may contain many foreign substances and hence may influence the performance and lifetime of the product due to the corrosion of the condenser and water pipe. (Use water source that complies with the below standard table for water purity control.)

If you use water supply other than the tap water to supply the water for the cooling tower, you must do a water quality inspection.

-If you use the closed cooling tower, the water quality must be controlled in accordance with the following standard table.

If you do not control the water quality in accordance with the following standard water quality table, it can cause performance deterioration to the air conditioner and severe problem to the product

Items	Closed type			Effect
	Circulating water	Supplemented water	Corrosion		Scale
	Basic Item
pH(25C)	7.0~8.0	7.0~8.0	O		O
Conductivity[25C](mS/m)	Below 30	Below 30	O		O
Chlorine ion(mg CI-/l)	Below 50	Below 50	O		-
Sulfuric acid ion(mg SO24-/l)	Below 50	Below 50	O		O
Acid demand[pH 4.8] (mg SiO2/l)	Below 50	Below 50	-		O
Total hardness(mg SiO2/l)	Below 70	Below 70	-		O
Ca hardness(mg CaCO3/l)	Below 50	Below 50	-		O
Ion silica(mg SiO2/l)	Below 30	Below 30	-		O
	Reference Item
Fe(mg Fe/l)	Below 1.0	Below 0.3	O		O
Copper(mg Cu/l)	Below 1.0	Below 0.1	O		-
Sulfuric acid ion(mg S2/l)	Must not be detected	Must not be detected	O		-
+	Below 0.3	Below 0.1	O		-
Ammonium ion(mg NH4/l)
Residual chlorine(mg Cl/l)	Below 0.25	Below 0.3	O		-
Free carbon dioxide(mg CO2/l)	Below 0.4	Below 4.0	O		-
Stability index	-	-	O		O

9
- The outside unit supports at the bottom shall have width of at least	<![if ! IE]> <![endif]>ENGLISH
INSTALLATION
- Install at places where it can endure the weight and vibration/noise of
the outside unit .
100mm under the Unit’s legs before being fixed.
- The outside unit supports should have minimum height of 200mm.
- Anchor bolts must be inserted at least 75mm.

100mm

Atleast

Reference

•The "O" mark for corrosion and scale means that there is possibility of occurrence.

•When the water temperature is 40°C or above or when uncoated iron is exposed to the water, it can result in corrosion. Therefore adding anti-corrosion agent or removing the air can be very effective.

•In case of using the closed type cooling tower, the cooling water and supplementing water must satisfy the water quality criteria of closed type system in the table.

•Supplementing water and supplied water must be supplied with tap water, industrial water and underground water excluding filtered water, neutral water, soft water etc.

•15 items in the table are general causes of corrosion and scale.

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 fours points so that impact is not applied to the unit.

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

Sub line

A 40° or less

B Rope supporter

! CAUTION

Be very careful while carrying the product.

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

•PP bands are used to pack some products.

Do not use them as a means for transportation because they are dangerous.

•Tear the plastic packaging bag and scrap it so that children cannot play with it.

Otherwise plastic packaging bag may suffocate children.

•When carrying in outside unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make outside 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.

100mm Atleast

100mm

Atleast

100mm Atleast

The location of the Anchor bolts

		755	(Unit : mm)
	62	631	62
<![if ! IE]> <![endif]>500	<![if ! IE]> <![endif]>472

The location of anchor bolt

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).

At least 200mm

10

<![if ! IE]> <![endif]>ENGLISH	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 outside 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			Unit : mm
		<![if ! IE]> <![endif]>75	<![if ! IE]> <![endif]>200	<![if ! IE]> <![endif]>75
	<![if ! IE]> <![endif]>100			<![if ! IE]> <![endif]>200

!WARNING

•Install where it can sufficiently support the weight of the outside unit .

If the support strength is not enough, the outside unit may drop and hurt people.

•Install where the outside unit may not fall in strong wind or earthquake.

If there is a fault in the supporting conditions, the outside 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 outside 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.

!CAUTION

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

Pallet(Wood Support)

- Remove before Installation

Preparation of Piping

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

Cut the pipes and the cable

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

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

-Cut the pipes a little longer than measured distance.

-Cut the cable 1.5m longer than the pipe length.

		Pipe
Copper		Reamer
		Slanted Uneven Rough
tube	90°
		Point down

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.

	Handle
Bar	Bar
"A"	Yoke
	Cone

Copper pipe

Clamp handle

Red arrow mark

Flaring work

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

Indoor unit	Pipe				" A "
[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.

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.

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Inclined Surface Cracked Uneven

damaged thickness

Even length all round

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	Tightening	A(mm)	Flare shape
		torque(N·m)
	Ø9.52	38±4	12.8-13.2	90°±2
					4	±2
	Ø12.7	55±6	16.2-16.6	A	5°
					R=0.4~0.8
	Ø15.88	75±7	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.

•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.

Union

• 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

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

2Turn 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 wrench.

2 Securely tighten the valve until the shaft contacts the main body seal.

3Make sure to tighten the cap securely.

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

Tightening torque

			Tightening torque N·m(Turn clockwise to close)
Shutoff			Shaft
valve		(valve body)			Cap	Service	Flare	Gas line piping
size					(Valve lid)	port	nut	attached to unit
	Closed		Opened	Hexagonal
				wrench
Ø6.35	6.0±0.6				17.6±2.0		16±2
				4mm
Ø9.52							38±4
Ø12.7	10.0±1.0				20.0±2.0		55±6	-
Ø15.88	12.0±1.2		5.0±0.0	5mm		12.7±2	75±7
Ø19.05	14.0±1.4				25.0±2.5		110±10
Ø22.2	30.0±3.0			8mm			-
Ø25.4								25±3

Heat insulation

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

2Precautions 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

Indoor unit

Thermal insulator (accessory)

						11
3		Ø6.35						<![if ! IE]> <![endif]>ENGLISH
	Standard refrigerant pipe EPDM heat insulation material thickness.
	Classification		Air conditioned location		Non-air conditioned location
			Note1) General location	Note2) Special location	Note3) General location	Note4) Negative condition
Liquid			Above t9	Above t9	Above t9	Above t9
		Ø9.52
pipe
		Above Ø12.7	Above t13	Above t13	Above t13	Above t13
		Ø9.52
		Ø12.7
		Ø15.88	Above t13
		Ø19.05		Above t19	Above t19
		Ø22.22
Gas
		Ø25.4				Above t25
pipe
		Ø28.58
		Ø31.75
		Ø34.9	Above t19	Above t25	Above t25
		Ø38.1
		Ø44.45

Note 1) General location: When the pipe passes through indoors in which the indoor unit is operated

- Apartment, classroom, office, mall, hospital, office-tel etc.

Note 2) Special location

1When the location is air conditioned but has severe temperature/humidity difference due to high ceiling

- Church, auditorium, theater, lobby etc.

2When the location is air conditioned but the internal temperature/humidity of the ceiling finishing is high

-Bathroom/swimming pool locker room etc.

(Building with roof ceiling of sandwich assembly type)

Note 3) General location: When the pipe passes indoors where the indoor unit is not operated

- Hall way etc. (Dormitory, school, office-tel)

Note 4) Negative condition: When below conditions 1 and 2 are met.

1When the pipe passes indoors where the indoor unit is not operated

2When the humidity is high, regionally, and there is no air flow in the pipe passing area

-When installing the outside unit within the outside pipe tray or at a location where it is ok to have freezes, apply 13t.

-If you are not sure with the selection of heat insulation material, coordinate with the supervision or HQ.

-The thickness of the above heat insulation material is based on the heat conductivity of 0.088W/m°C.

Plumbing materials and storage methods

Pipe must be able to obtain the specified thickness and should be used with low impurities.

Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.

Should not be mixed with contaminations such as dust, moisture.

<![if ! IE]>

<![endif]>ENGLISH

12

Refrigerant piping on three principles

		Drying	Cleanliness	Airtight
		Should be no moisture	No dust inside.	There is no refrigerant
		inside		leakage
	Items	Moisture	Dust	Leakage
		- Significant hydroly-	- Degradation of re-	- Gas shortages
		sis of refrigerant oil	frigerant oil	- Degradation of re-
		- Degradation of re-
			- Poor insulation of	frigerant oil
		frigerant oil
			the compressor	- Poor insulation of
	Cause	- Poor insula’tion of
			- Do not cold and	the compressor
	failure	the compressor
			warm	- Do not cold and
		- Do not cold and
		warm	- Clogging of EEV,	warm
		- Clogging of EEV,	Capillary
		Capillary
		- No moisture in the pipe	- No dust in the pipe.	- Airtightness test
		- Until the connec-	- Until the connec-	should be.
				- Brazing operations
		tion is completed,	tion is completed,
		the plumbing pipe	the plumbing pipe	to comply with
		entrance should be	entrance should be	standards.
		strictly controlled.	strictly controlled.	- Flare to comply
		- Stop plumbing at	- Pipe entrance	with standards.
	Coun-	rainy day.	should be taken	- Flange connections
			side or bottom.
		- Pipe entrance		to comply with
	termea-	should be taken	- When removal burr	standards.
	sure	side or bottom.	after cutting pipe,
		- When removal burr	pipe entrance
			should be taken
		after cutting pipe, pipe
		entrance should be	down.
			- Pipe entrance
		taken down.
		- Pipe entrance	should be fitted cap
			when pass through
		should be fitted cap
			the walls.
		when pass through
		the walls.

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

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

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

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

CLOSE OPEN

! WARNING

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

Nitrogen substitution method

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

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

It prevents normal operation of the compressor.

In order to avoid this problem, Welding should be done after replacing air by nitrogen gas.

When welding plumbing pipe, the work is required.

Welding Point

Oxide scale

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

Regulator

Nitrogen gas

Pressure 0.02MPa less

Taping	Auxiliary valve
(Should not
contain air)

<![if ! IE]>

<![endif]>Nitrogen

! CAUTION

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

•Always use a pressure reducing valve.

•Please do not use commercially available antioxidant.

The residual material seems to be the oxide scale is observed. In fact, due to the organic acids generated by oxidation of the alcohol contained in the anti-oxidants, ants nest corrosion occurs. (causes of organic acid ’ alcohol + copper + water + temperature)

Ball Valve	Elbow Ball Valve(Gas Pipe)
(Liquid Pipe)

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

Cap: Remove caps and operate valve, etc. After operation, always reattach caps (tightening torque of valve cap: 25Nm (250kg-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: 14Nm (140kg-cm) or more).

Liquid pipe

Gas pipe

Elbow joint (field supply)

ηRemove the front panel before pipe connection

ηMust check the pipe (liquid pipe, low pressure gas pipe, high pressure gas pipe) before pipe connection

Liquid pipe

Liquid pipe

Low pressure gas pipe

Gas pipe

High pressure gas pipe

Connection of Outside units

Outside units

Model Low Pressure Gas Pipe

Liquid Pipe

High Pressure Gas Pipe

A

B

416

331

334

(Master)

(Slave1)

I.D.28.58

408

I.D.28.58

I.D.15.88

314

I.D.15.88

281

2 Unit

A ARCNN21

I.D.31.8

I.D.34.9

I.D.22.2

111

I.D.19.05

I.D.12.7

I.D.9.52

83

I.D.22.2

I.D.19.05

I.D.19.05

83

I.D.41.3

I.D.38.1 O.D.34.9

I.D.28.58

I.D.22.2

O.D.19.05

I.D.12.7

I.D.15.88

I.D.15.88

I.D.12.7

130

70

A

B

C

341

334

416

298

281

408

(Master)

(Slave1)

(Slave2)

I.D.28.58

I.D.28.58

3 Unit

ARCNN31

I.D.41.3

I.D.34.9

111

I.D.22.2

I.D.19.05

I.D.19.05

83

I.D.31.8

I.D.34.9

I.D.22.2

111

I.D.41.3

O.D.34.9

I.D.41.3

I.D.38.1 O.D.34.9

I.D.28.58

I.D.15.88

I.D.12.7

I.D.28.58

125

130

415

334

341

A

B

C

D

375

281

298

(Master)

(Slave1)

(Slave2)

(Slave3)

4 Unit

C ARCNN41

I.D.41.3

134

I.D.22.2

I.D.19.05

I.D.19.05

83

I.D.41.3

I.D.34.9

I.D.44.48 I.D.53.98

111

I.D.25.4

O.D.22.2

I.D.41.3

O.D.34.9

I.D.28.58

I.D.15.88

I.D.12.7

C

80

I.D.28.58

125

*Install the branch pipe between outside units so that the outlet pipe is parallel to the surface.

Y branch

	A	Within +/- 10
		B
	A To outside unit	Viewed from point A
		in direction of arrow
	B To branch piping or indoor unit
	Facing	Facing
	downwards	upwards

13

Installation of Outside Unit, HR Unit, Indoor Unit	<![if ! IE]> <![endif]>ENGLISH
Refrigerant Pipe
3 pipes are connected to the HR unit from the outside unit, classified
into liquid pipe, low pressure gas pipe and high pressure gas pipe de-
pending on status of refrigerant passing through the pipe.
You must connect 3 pipes from outside 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

Liquid pipe

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

Gas 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).

Within ± 3° Within ± 3°

! CAUTION

When installing the branch pipe vertically between the outside units, the refrigerant can be uneven between the outside units, leading to compressor burn and reduced capacity.

Installation procedure for HR unit

1 Using an insert-hole-in- anchor, hang the hanging bolt.

2Install 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.

3After 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.

4This 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.

Type of HR Unit

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

Ex) Installation of 6 indoor units

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

1

2

1

2

3

PRHR021(2 branches) PRHR031(3 branches)

1 2 3 4

PRHR041(4 branches)

Joint Method of HR Unit (Big Duct : ARNU76GB8-,

ARNU96GB8-)

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
Six-sided Nut
(M10 or M8)		A
Hanger metal
		1	2	3	4	1	2	3	4
Flat washer		B8		BG		BH		B8
(M10)	Insulation
		(96k) (28k)				(21k)	(76k)

Hanging bolt (M10 or M8)

14

<![if ! IE]> <![endif]>ENGLISH	Liquid pipe
	Low pressure gas pipe			1	2	3 4
	High pressure gas pipe
	Remove caps on		Gas pipe Ø15.88 (5/8)
	The brazing part.		Liquid pipe Ø9.52 (3/8)
			Brazing Type
	HR unit	PRHR021	PRHR031	PRHR041
	Low pressure	Ø22.2	Ø28.58	Ø28.58
	gas pipe
	High pressure	Ø19.05	Ø22.2	Ø22.2
	gas pipe
	Liquid pipe	Ø9.52	Ø12.7	Ø15.88

Installation of Zoning Control

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

HR unit	HR unit
Zoning control group 1	sealing	Zoning control group 2
(Max. 8 Indoor Units)		(Max. 8 Indoor Units)
Changeover under control	Auto changeover	Changeover under control

! WARNING

•A branch pipe of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit.

(up to 14.1kW (48kBtu/h) for max installation)

•The maximum total capacity of indoor units connected to a PRHR041 HR unit is 56.4kW (192 kBtu/h).

•The maximum number of indoor units connected to a PRHR041 HR unit are 32 indoor units. (The Maximum indoor units per a branch pipe of HR unit are 8 indoor units)

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

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

[Reducers for indoor unit and HR unit]

(Unit : mm)

Gas pipe

Models

Liquid pipe

Low pressure

High pressure

Indoor unit

–

reducer

OD9.52(3/8)

Ø6.35(1/4)

OD15.88(5/8)

Ø12.7(1/2)

PRHR021A

OD19.05(3/4)

Ø15.88(5/8)

Ø12.7(1/2)

OD22.2(7/8)

Ø19.05(3/4)

Ø15.88(5/8)

OD9.52(3/8)

Ø6.35(1/4)

OD12.7(1/2)

Ø9.52(3/8)

OD15.88(5/8)

Ø12.7(1/2)

HR unit

reducer

PRHR031A/

OD22.2(7/8)

Ø19.05(3/4)

Ø15.88(5/8)

OD28.58(1-1/8)

Ø22.2(7/8)

Ø19.05(3/4)

PRHR041A

OD15.88(5/8)

Ø12.7(1/2)

Ø9.52(3/8)

OD15.88(5/8)

Ø12.7(1/2)

OD19.05(3/4)

Ø15.88(5/8)

CAUTION

1Use the following materials for refrigerant piping.

-Material: Seamless phosphorous deoxidized copper pipe

-Wall thickness : Comply with the relevant local and national regu-

lations 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	44.45	53.98
[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	1.55	2.1
thickness [mm]

2Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.

3Use care to prevent dust, water or other contaminants from entering the piping during installation.

4Reduce the number of bending portions as much as possible, and make bending radius as big as possible.

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

	Y branch		Header
		4 branch	7 branch	10 branch
	ARBLB01621, ARBLB03321,	ARBL054	ARBL057	ARBL1010
	ARBLB07121, ARBLB14521,
		ARBL104	ARBL107	ARBL2010
	ARBLB23220

6If 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.

7Always 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.

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

A

A

B

To Outside Unit

Sealed Piping

9The Multi V water 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.

10Never perform a pump down. This will not only damage the compressor but also deteriorate the performance.

11Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.

12Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.

13When connecting the refrigerant piping, make sure the service valves of the Outside Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outside and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.