LG ARWV100LAL4 INSTALLATION MANUAL

MFL67705803 2018. 9. 17. 12:58 Page 1

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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.

ARWV100LAL4

MFL67705803	www.lg.com
Rev.00_091718	Copyright © 2013 - 2018 LG Electronics Inc. All Rights Reserved.

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ARWV Series Outside unit Installation Manual

TABLE OF CONTENTS

Safety Precautions.........................................................................................................	3
Installation Process .......................................................................................................	7
Outside units Information..............................................................................................	8
Environment-friendly Alternative Refrigerant R410A .................................................	9
Select the Best Location................................................................................................	9
Installation space ........................................................................................................	10
Water control ................................................................................................................	11
Lifting method ..............................................................................................................	13
Installation ....................................................................................................................	14
Refrigerant piping installation ....................................................................................	19
Device protection unit..................................................................................................	22
Refrigerant piping system ..........................................................................................	23
Y branch pipe and header branch pipe type .............................................................	37
Leakage test and vacuum ...........................................................................................	39
Electrical Wiring ...........................................................................................................	41
Test Run ........................................................................................................................	53
Maintenance..................................................................................................................	59
Cooling tower applied method ...................................................................................	61
Caution For Refrigerant Leak......................................................................................	62
Water Solenoid Valve Control .....................................................................................	64

2 Outside Unit

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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.

WARNING This symbol indicates the possibility of death or serious injury.

CAUTION 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.

WARNING

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

• There is risk of fire or failure of product.

Do not install the unit at the outdoor.

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

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

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

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

Do not install the product on a defective installation stand.

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

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Safety Precautions

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

•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.

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.

ν Operation

Do not damage or use an unspecified power cable.

Use a dedicated outlet for this appliance.

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

• 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.

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.

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.

4 Outside Unit

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

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

•It can cause the injury, such as cutting the finger. Also the damaged fin may result in degradation of capacity.

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

•The inverter equipment, private power generator, high-fre- quency 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.

Install the outdoor units at a place well ventilated.

• Location where is not well ventilated may cause low performance and damage of PCB by heat.

ν Operation
Do not use the air conditioner in special		Do not block the inlet or outlet.
environments.
• Oil, steam, sulfuric smoke, etc. can significantly reduce the		• It may cause failure of appliance or accident.
performance of the air conditioner or damage its parts.
Make the connections securely so that the		Be sure the installation area does not deteri-
outside force of the cable may not be applied		orate with age.
to the terminals.
• Inadequate connection and fastening may generate heat		• If the base collapses, the air conditioner could fall with it,
and cause a fire.		causing property damage, product failure, or personal in-
		jury.

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

• A bad connection may cause water leakage.

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Safety Precautions

Be very careful about product transportation.

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

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

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

•When transporting the 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.

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

•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.

•Starting operation immediately after turning on the main power switch can result in severe

damage to internal parts. Keep the power switch turned on during the operational season.

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

• It can cause a burn or frostbite.

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

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

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

• Be careful and avoid personal injury.

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

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

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

ENVIRONMENTAL INFORMATION

6 Outside Unit

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Installation Process

Installation Process

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

Outside unit foundation work The foundation must be level even

Installation of outside 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

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

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

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Outside units Information

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.

ν Combination Ration(50~200%)

Outside Number	Connection Capacity
Single outside units	200%
Double outside units	160%
Triple outside units	130%

Notes:

*We can guarantee the operation only within 130% Combination.

If you want to connect more than 130% combination, please contact us and discuss the require-

ment like below.

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

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

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

η If it will be installed 20HP and 30HP, please contact the HQ.

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

ν Cooling Only

	System Capacity		HP	10	20	30
		Combination Unit		ARWV100DAL4	ARWV200DAL4	ARWV300DAL4
	Model Name			ARWV100DAL4	ARWV100DAL4	ARWV100DAL4
		Independent Unit			ARWV100DAL4	ARWV100DAL4
						ARWV100DAL4
	Product Refrigerant Charge		kg	2.0	2.0+2.0	2.0+2.0+2.0
	Maximum Connection No. of Indoor			16(25)	32(44)	49(60)
	Net Weight		kg	120 × 1	120 × 2	120 × 3
			lb	265 × 1	265 × 2	265 × 3
	Dimensions (WxHxD)		mm	(755 × 997 × 500) × 1	(755 × 997 × 500) × 2	(755 × 997 × 500) × 3
			inch	(29-23/32 × 39-1/4 × 19-11/16) × 1(29-23/32 × 39-1/4 × 19-11/16) × 2(29-23/32 × 39-1/4 × 19-11/16) × 3
	Refrigerant	Liquid	mm (inch)	9.52(3/8)	12.7(1/2)	19.05(3/4)
	Connecting Pipe	Gas	mm (inch)	22.2(7/8)	28.58(1-1/8)	34.9(1-3/8)
	Water	Inlet	mm	PT 25 (External Thread)	PT 25 + PT 25 (External Thread)	PT 25 + PT 25 + PT 25 (External Thread)
		Outlet	mm	PT 25 (External Thread)	PT 25 + PT 25 (External Thread)	PT 25 + PT 25 + PT 25 (External Thread)
	Connecting Pipe
		Drain Outlet	mm	20 (External Thread)	20 (External Thread)	20 (External Thread)

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Environment-friendly Alternative Refrigerant R410A

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

Precaution when selecting the installation location

•Select space for installation 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

•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.)

•Install the outdoor units at a place well ventilated.

CAUTION

1.Do not install Multi V water outside. Always install indoor like machine room.

2.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.

3.Location where is not well ventilated may cause low performance and damage of PCB by heat.

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Installation space

Installation space

Individual Installation

Required the minimum space as shown below for installation and check. If the space is not fit on this drawing, consult with LG.

: Service area

		<![if ! IE]> <![endif]>300
	Product	<![if ! IE]> <![endif]>500
	(Outside unit)
Water pipe
installation
space
	Service area	<![if ! IE]> <![endif]>600
	(Front)
	350
300	755	100
	<Top View>

(unit : mm)

<![if ! IE]>

<![endif]>800

	<![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)

	Product
	(Outside unit)
	Service area
	(Front)
	350
300	755	200

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Product		Product	<![if ! IE]> <![endif]>500
(Outside unit)		(Outside unit)
Service area		Service area	<![if ! IE]> <![endif]>600
(Front)		(Front)
350		350
755	200	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.

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Water control

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.

•It can use to both the open cooling type and closed cooling type tower.

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Water control

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 SO42-/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

[Reference]

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

(2)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.

(3)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.

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

(5)15 items in the table are general causes of corrosion and scale.

12 Outside Unit

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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 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

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A 40° or less

B Rope supporter

WARNING

CAUTION

•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.

•When carrying with the forklift, be careful not to drop the product.

Installation Manual 13

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Installation

Installation

Location of anchor bolt

	756 mm
62 mm	632 mm	62 mm

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The location of anchor bolt

CAUTION

•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 outside unit during operation) and paths of the pipe and wiring when making a base support.

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Installation

Preparation of Piping

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

1)Cut the pipes and the cable.

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

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

•Cut the pipes a little longer than measured distance.

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

2)Burrs removal

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

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

Copper		Slanted Uneven Rough
tube	90°

Pipe

Reamer

Point down

3)Flaring work

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

Indoor unit		Pipe		" 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.

4)Check

•Compare the flared work with figure below.

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

	Handle
Bar	Bar
"A"	Yoke
	Cone

Copper pipe

Clamp handle

Red arrow mark

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Inclined Surface Cracked Uneven

damaged thickness

Even length all round

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MFL67705803 2018. 9. 17. 12:58 Page 16

Installation

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

Precautions when connecting pipes

•See the following table for flare part machining dimensions.

•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 torque(Ncm)	A(mm)	flare shape
Ø9.5	3270-3990	12.8-13.2	90° ±2
			45°	±2
Ø12.7	4950-6030	16.2-16.6	A
			R=0.4~0.8
Ø15.9	6180-7540	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 span-
ner 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.

16 Outside Unit

Indoor unit

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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)

3. Standard refrigerant pipe EPDM heat insulation material thickness

						[Unit:mm]
		Classification	Air conditioned location		Non-air conditioned location
			Note1) General location	Note2) Special location	Note3) General location	Note4) Negative condition
	Liquid	Ø6.35	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	Above t19	Above t19
	Gas	Ø19.05
		Ø22.22				Above t25
	pipe
		Ø25.4
		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

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

-Church, auditorium, theater, lobby etc.

2.When 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.

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

2.When 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.

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Installation Manual 17

MFL67705803 2018. 9. 17. 12:58 Page 18

Installation

4. Connecting branch pipe between outside units

[Unit:mm]

Outside units

Model

Gas Pipe

					416(16-3/8)
					408(16-1/16)
A	B		I.D.28.58(1-1/8)			I.D.28.58(1-1/8)
								<![if ! IE]> <![endif]>3/8)
(Master)	(Slave1)
						I.D.22.2(7/8)		<![if ! IE]> <![endif]>-
			I.D.31.8(1-1/4) I.D.34.9(1-3/8)					<![if ! IE]> <![endif]>111(4
2 Unit			A ARCNN21				I.D.28.58(1-1/8)
			I.D.38.1(1-1/2)
			I.D.41.3(1-5/8)	O.D.34.9(1-3/8)			I.D22.2(7/8)
					O.D28.58(1-1/8)
			130(5-1/8)				I.D19.05(3/4)
						120(4-23/32)
					406(15-31/32)
					353(13-29/32)
			I.D38.1(1-1/2)
A	B	C	I.D.41.3(1-5/8)		I.D34.9(1-3/8)	I.D.34.9(1-3/8)		<![if ! IE]> <![endif]>-3/8)
(Master)	(Slave1)	(Slave2)						<![if ! IE]> <![endif]>111(4
3 Unit			ARCNN31
							I.D.28.58(1-1/8)
			I.D.41.3(1-5/8)		O.D.34.9(1-3/8)		I.D22.2(7/8)
					O.D28.58(1-1/8)
							I.D19.05(3/4)
			125(4-29/32)			120(4-23/32)

Liquid Pipe

				331(13-1/32)
				314(12-3/8)
	I.D.15.88(5/8)				I.D.15.88(5/8)
	I.D.19.05(3/4)			I.D.12.7(1/2)			<![if ! IE]> <![endif]>-9/32)
					I.D.9.52(3/8)		<![if ! IE]> <![endif]>83(3
				I.D.12.7(1/2)		I.D.15.88(5/8)
	I.D.22.2(7/8)		O.D.19.05(3/4)		I.D12.7(1/2)
				O.D15.88(5/8)		I.D9.52(3/8)
		70(2-3/4)
					110(4-11/32)
				334(13-5/32)
				281(11-1/16)
	I.D.22.2(7/8)	I.D.19.05(3/4)			I.D.19.05(3/4)		<![if ! IE]> <![endif]>-9/32)
							<![if ! IE]> <![endif]>83(3
					I.D.15.88(5/8)	I.D.12.7(1/2)
	I.D. 15.88(5/8)				I.D.9.52(3/8)
	O.D. 19.05(3/4)			I.D. 12.7(1/2) O.D. 12.7(1/2)		I.D. 6.35(1/4)
				X2
	110(4-11/32)				110(4-11/32)

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

Execute the Within +/- 10 welding while

pouring nitrogen

Viewed from point A in direction of arrow

5. Two or more units combination only

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Do not cut for 70mm or less

•The check valve must be installed on each of outdoor unit, when you install two or more outdoor units combination.

•The Check valve must be installed vertically

•The check valve must be kept in low-temperature condition during welding work.

Wet towel

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.

•When combination installed, it should be installed with the check valve on each unit. Otherwise it may cause low performance.

18 Outside Unit

MFL67705803 2018. 9. 17. 12:58 Page 19

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

Do not cutting.

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.

	η Remove the front panel before pipe connection
	η Must check the pipe (gas pipe, liquid pipe) before pipe con-	Gas pipe
	nection
		Liquid pipe

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Installation Manual 19

MFL67705803 2018. 9. 17. 12:58 Page 20

Refrigerant piping installation

Installation of water pipe

1) Water pipe system diagram

•The water pressure resistance of the water pipe system of this product is 1.98MPa

•When the water pipe passes indoors, make sure to execute heat insulation on the pipe so that water drops do not form on the outer side of the water pipe.

•The size of the drain pipe must be equal to or larger than the diameter of the connecting product.

-Always install a trap so that the drained water does not back flush.

•Always install a strainer (20 Mesh or above) at the entrance of the water pipe. (When sand, trash, rusted pieces get mixed into the water supply, it can cause problems to the product due to blocking)

-If On/Off valve is applied, by interlocking with outside unit, it can save the energy consumption of pump by blocking the water supply to the outside unit not operating. Select appropriate valve and install on site if necessary.

•Install a pressure gauge and temperature gauge at the inlet and outlet of the water pipe.

•Flexible joints must be installed not to cause any leakage from the vibration of pipes.

•Install a service port to clean the heat exchanger at the each end of the water inlet and outlet.

•For the components of the water pipe system, always use components above the designed water pressure.

	Air vent
BALL V/V(TYP.)	Presssure/Temperature gage
Flow control valve
Service Port
Strainer
Flow control valve
On/Off Valve	FLEXIBLE JOINT
	SUS(TYP.)(7)
	Drain line

CAUTION

Do not directly connect the drain outlet to the water pipe outlet. (It can cause problems to the product.)

2) Water pipe connection

•The water pipe should be the same size of the connection on the product or more.

•If necessary install the insulation material in the water pipe inlet/outlet to prevent water drop, freeze and to save energy. (Use the above 20mm thickness PE insulation material.)

•Tightly connect the socket to the water pipe refer to below table for recommended specification. (Too much torque may cause the damage of the facility.)

20 Outside Unit