LG ARUN080LTS4 INSTALLATION MANUAL

P/NO : MFL67221411

www.lg.com

INSTALLATION MANUAL

AIR CONDITIONER

• Please read this installation manual completely before installing the product.

• Installation work must be performed in accordance with the national
wiring standards by authorized personnel only.

• Please retain this installation manual for future reference after reading
it thoroughly.your set and retain it for future reference.

ENGLISH

ESPAÑOL

PORTUGUESE

• 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.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• 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 :

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:

TIPS FOR SAVING ENERGY

2

ENGLISH

TIPS FOR SAVING ENERGY

3

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

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.

• Prepare for strong wind or earthquake and install the unit at the specified place.

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

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

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

• 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 mal-

function 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 outdoor unit and fire

or electric shock may result.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant
concentration from exceeding the safety limit when the refrigerant leaks.

- Consult the dealer regarding the appropriate measures to prevent the safety limit from being ex-

ceeded. 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 outdoor unit.

- This could result in personal injury and product damage.

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

equipped.)

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

IMPORTANT SAFETY INSTRUCTIONS

4

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

5

ENGLISH

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 outdoor unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the unit where combustible gas may leak.

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

• Use power cables of sufficient current carrying capacity and rating.

- Cables that are too small may leak, generate heat, and cause a fire.

• Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air
conditioner, not a precision refrigeration system.

- There is risk of damage or loss of property.

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

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

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

-

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

• Do not install the product where it is exposed to sea wind (salt spray) directly.

- It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could

cause product malfunction or inefficient operation.

Operation

• Do not use the air conditioner in special environments.

-

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

• 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 per-

sonal 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 outdoor unit, suspending it at the specified positions on the unit base. Also support the

outdoor unit at four points so that it cannot slip sideways.

!

6

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

• 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.

• Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

- There are sharp and moving parts that could cause personal injury.

7

2 TIPS FOR SAVING

ENERGY

3 IMPORTANT SAFETY

INSTRUCTIONS

8 INSTALLATION

PROCESS

9 OUTDOOR UNITS

INFORMATION

13 ENVIRONMENT-

FRIENDLY ALTERNATIVE
REFRIGERANT R410A

14 SELECT THE BEST

LOCATION

15 INSTALLATION SPACE

15 Individual Installation

17 LIFTING METHOD
18 INSTALLATION

18 The location of the Anchor bolts
19 Foundation for Installation
21 Preparation of Piping
23

Plumbing materials and storage methods

25 REFRIGERANT PIPING

INSTALLATION

25 Precautions on Pipe connection / Valve

operation

26 PIPE CONNECTIONS

BETWEEN INDOOR AND
OUTDOOR UNIT

26 Preparation Work
27 Pipe Drawing Out during Single / Series

connection

29 Refrigerant piping system
42 Refrigerant charging
43 Distribution Method
44 Branch pipe Fitting
48 Leak Test and Vacuum drying
50 Vacuum Mode
51 Thermal insulation of refrigerant piping

52 ELECTRICAL WIRING

52 Caution
54 Control box and connecting position of

wiring

55 Communication and Power Cables
56 Wiring of main power supply and

equipment capacity

57 Field Wiring
63 Checking the setting of outdoor units
64 Automatic Addressing
67 Group Number setting
68 Cool & Heat selector
69 Static pressure compensation mode
70 Night Low Noise Function
71 Overall defrost mode
72 Setting the ODU address
73 Snow removal & rapid defrost
74 Target pressure adjusting
75 Self-Diagnosis Function

86 CAUTION FOR

REFRIGERANT LEAK

86 Introduction
86 Checking procedure of limiting

concentration

88 INSTALLATION GUIDE

AT THE SEASIDE

TABLE OF CONTENTS

TABLE OF CONTENTS

ENGLISH

8

INSTALLATION PROCESS

ENGLISH

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.)

!

INSTALLATION PROCESS

Determination of division work

Preparation of contract drawings

Sleeve and insert work

Installation of indoor unit

Refrigerant piping work

Drain pipe work

Duct work

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Airtight test

Vacuum drying

Additional charge of refrigerant

Fit facing panels

Indicate clearly who will be responsible for switch setting.

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

Take account of gradient
of drain piping

Check model name to make
sure the fitting is made correctly

Special attention to dryness,
cleanness and tightness

Adjust to downward gradient

Make sure airflow is sufficient

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

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

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

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

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

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

Outdoor unit foundation work

Installation of outdoor unit

2

) there must be no drop in pressure.

The foundation must be level even

Avoid short circuits and ensure
sufficient space is allowed for service

Automatic addressing of indoor unit

Test run adjustment

Transfer to customer with explanation

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

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

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

OUTDOOR UNITS INFORMATION

9

ENGLISH

Power Supply : 3Ø, 380V, 60Hz / 3Ø, 380 - 415V, 50Hz

Model Name : A(B)RUN***LTS4

CAUTION

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%, the airflow is operated as low in the all
indoor units.

• The number of ( ) means the number of Max. connectable indoor units, when the con­nected capacity of indoor units is in the table above.

Combination Ratio(50~200%)

Outdoor Number Connection Ratio

Single outdoor units 200%

Double outdoor units 160%

Triple outdoor units 130%

!

OUTDOOR UNITS INFORMATION

Unit
System(HP)

Model

Combination Unit

A(B)RUN140LTS4 A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4

Independent Unit

A(B)RUN140LTS4 A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4
Refrigerant Precharged
Amount

kg

8.5 8.5 8.5 10

lbs

18.7 18.7 18.7 22

Number of maxmum connectable indoor units

Net Weight

kg

235 × 1 235 × 1 270 × 1 280 × 1

lbs

518 × 1 518 × 1 595 × 1 617 × 1

Dimensions (WxHxD)

mm

inch

(48-13/16 × 66-5/32

× 29-29/32) x 1

(48-13/16 × 66-5/32
× 29-29/32) x 1

(48-13/16 × 66-5/32
× 29-29/32) x 1

(48-13/16 × 66-5/32
× 29-29/32) x 1

Piping Conections

mm(inch)
mm(inch)

1 Outdoor Unit

14 16 18 20

23(35) 26(40) 29(45) 32(50)

(1,240x1,680x760) x 1 (1,240×1,680×760) × 1 (1,240×1,680×760) × 1 (1,240×1,680×760) × 1

Ø 12.7(1/2) Ø 12.7(1/2) Ø 15.88(5/8) Ø 15.88(5/8)

Ø 28.58(1-1/8) Ø 28.58(1-1/8) Ø 28.58(1-1/8) Ø 28.58(1-1/8)

Unit
System(HP)

Model

Combination Unit

A(B)RUN080LTS4 A(B)RUN100LTS4 A(B)RUN120LTS4

Independent Unit

A(B)RUN080LTS4 A(B)RUN100LTS4 A(B)RUN120LTS4
Refrigerant Precharged
Amount

kg

6.5 6.5 6.5

lbs

14.3 14.3 14.3

Number of maxmum connectable indoor units

Net Weight

kg

195 × 1 201 × 1 201 × 1

lbs

430 × 1 443 × 1 443 × 1

Dimensions (WxHxD)

mm
inch

Piping Conections

mm(inch)
mm(inch)

1 Outdoor Unit

81012

13(20) 16(25) 20(30)

(920×1,680×760) × 1 (920×1,680×760) × 1 (920×1,680×760) × 1
(36-7/32 × 66-5/32 × 29-29/32) x 1 (36-7/32 × 66-5/32 × 29-29/32) x 1 (36-7/32 × 66-5/32 × 29-29/32) x 1

Ø 9.52(3/8) Ø 9.52(3/8) Ø 12.7(1/2)

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

10

OUTDOOR UNITS INFORMATION

ENGLISH

Unit
System(HP)

Model

Combination Unit

A(B)RUN220LTS4 A(B)RUN240LTS4 A(B)RUN260LTS4 A(B)RUN280LTS4

Independent Unit

A(B)RUN120LTS4 A(B)RUN120LTS4 A(B)RUN140LTS4 A(B)RUN160LTS4

A(B)RUN100LTS4 A(B)RUN120LTS4 A(B)RUN120LTS4 A(B)RUN120LTS4
Refrigerant Precharged
Amount

kg

6.5 × 2 6.5 × 2 8.5 + 6.5 8.5 + 6.5

lbs

14.3 × 2 14.3 × 2 18.7 + 14.3 18.7 + 14.3

Number of maxmum connectable indoor units

Net Weight

kg 201 × 2 201 × 2

(235 × 1) + (201 × 1) (235 × 1) + (201 × 1)

lbs 443 × 2 443 × 2

(518 × 1) + (443 × 1) (518 × 1) + (443 × 1)

Dimensions (WxHxD)

mm

(920×1,680×760) x 2

(920×1,680×760) x 2

(1,240x1,680x760) x 1
+ (920x1,680x760) x 1

(1,240×1,680×760) × 1
+ (920×1,680×760) × 1

inch

(36-7/32 × 66-5/32 ×

29-29/32) x 2

(36-7/32 × 66-5/32 ×
29-29/32) x 2

(48-13/16 × 66 -5/32 × 29

- 29/32) x 1 + (36-7/32 ×
66 - 5/32 × 29-29/32) x 1

(48-13/16 × 66-5/32 × 29­29/32) x 1 + (36-7/32 × 66­5/32 × 29-29/32) x 1

Piping Conections

mm(inch)
mm(inch)

2 Outdoor Unit

22 24 26 28

35(44) 39(48) 42(52) 45(56)

Ø 15.88(5/8) Ø 15.88(5/8) Ø 19.05(3/4) Ø 19.05(3/4)

Ø 28.58(1-1/8) Ø 34.9(1-3/8) Ø 34.9(1-3/8) Ø 34.9(1-3/8)

Unit

2 Outdoor Unit 3 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN380LTS4 A(B)RUN400LTS4 A(B)RUN420LTS4 A(B)RUN440LTS4

Independent Unit

A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4

A(B)RUN180LTS4 A(B)RUN200LTS4 A(B)RUN140LTS4 A(B)RUN140LTS4

A(B)RUN100LTS4 A(B)RUN100LTS4
Refrigerant Precharged
Amount

kg

10 + 8.5 10 × 2 (8.5 × 2) + 6.5 10 + 8.5 + 6.5

lbs

22 + 18.7 22 × 2

(18.7 × 2) + 14.3 22 + 18.7 + 14.3

Number of maxmum connectable indoor units

Net Weight

kg

(280 × 1) + (270 x 1)

280 × 2

(270 × 1) + (235 × 1) + (201 × 1) (280 × 1) + (235 × 1) + (201 × 1)

lbs

(617 × 1) + (595 × 1)

617 × 2

(595 × 1) + (518 × 1) + (443 × 1) (617 × 1) + (518 × 1) + (443 × 1)

Dimensions (WxHxD)

mm

(1,240×1,680×760) x 2

(1,240×1,680×760) x 2

(1,240×1,680×760) × 2

+ (920×1,680×760) × 1

(1,240×1,680×760) × 2
+ (920×1,680×760) × 1

inch

(48-13/16 × 66-5/32 × 29­29/32) x 2

(48-13/16 × 66­5/32 × 29-29/32) x 2

(48-13/16 × 66-5/32 × 29-

29/32) x 2 + (36-7/32 × 66-

5/32 × 29-29/32) x 1

(48-13/16 × 66-5/32 × 29­29/32) x 2 + (36-7/32 × 66­5/32 × 29-29/32) x 1

Piping Conections

mm(inch)
mm(inch)

38 40 42 44

61(64) 64 64 64

Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4)

Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8)

Unit
System(HP)

Model

Combination Unit

A(B)RUN300LTS4 A(B)RUN320LTS4 A(B)RUN340LTS4 A(B)RUN360LTS4

Independent Unit

A(B)RUN180LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4

A(B)RUN120LTS4 A(B)RUN120LTS4 A(B)RUN140LTS4 A(B)RUN160LTS4
Refrigerant Precharged
Amount

kg

8.5 + 6.5 10 + 6.5 10 + 8.5 10 + 8.5

lbs

18.7 + 14.3 22 + 14.3 22 + 18.7 22 + 18.7

Number of maxmum connectable indoor units

Net Weight

kg

(270 × 1) + (201 × 1) (280 × 1) + (201 × 1) (280 × 1) + (235 × 1) (280 × 1) + (235 × 1)

lbs

(595× 1) + (443 × 1) (617 × 1) + (443 × 1) (617 × 1) + (518 × 1) (617 × 1) + (518 × 1)

Dimensions (WxHxD)

mm

(1,240x1,680x760) x 2 (1,240×1,680×760) x 2 (1,240×1,680×760) x 2

(1,240×1,680×760) x 2

inch

(48-13/16 × 66-5/32

× 29-29/32) x 2

(48-13/16 × 66-5/32
× 29-29/32) x 2

(48-13/16 × 66-5/32

× 29-29/32) x 2

(48-13/16 × 66-5/32 ×
29-29/32) x 2

Piping Conections

mm(inch)
mm(inch)

2 Outdoor Unit

30 32 34 36

49(60) 52(64) 55(64) 58(64)

Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4)

Ø 34.9(1-3/8) Ø 34.9(1-3/8) Ø 34.9(1-3/8) Ø 41.3(1-5/8)

OUTDOOR UNITS INFORMATION

11

ENGLISH

Unit

3 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN460LTS4 A(B)RUN480LTS4 A(B)RUN500LTS4 A(B)RUN520LTS4

Independent Unit

A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4
A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4

A(B)RUN100LTS4 A(B)RUN100LTS4 A(B)RUN100LTS4 A(B)RUN120LTS4
Refrigerant Precharged
Amount

kg 10 + 8.5 + 6.5 10 + 8.5 + 6.5 (10 × 2) + 6.5 (10 × 2) + 6.5

lbs 22 + 18.7 + 14.3 22 + 18.7 + 14.3 (22 × 2) + 14.3 (22 × 2) + 14.3

Number of maxmum connectable indoor units

Net Weight

kg

(280 × 1) + (235 × 1) + (201 × 1) (280 × 1) + (270 × 1) + (201 × 1)

(280 × 2) + (201 × 1) (280 × 2) + (201 × 1)

lbs

(617 × 1) + (518 × 1) + (443 × 1) (617 × 1) + (595 × 1) + (443 × 1)

(617 × 2) + (443 × 1) (617 × 2) + (443 × 1)

Dimensions (WxHxD)

mm

(1,240×1,680×760) × 2

+ (920×1,680×760) × 1

(1,240×1,680×760) × 2
+ (920×1,680×760) × 1

(1,240×1,680×760) × 2
+ (920×1,680×760) × 1

(1,240×1,680×760) × 2
+ (920×1,680×760) × 1

inch

(48-13/16 × 66-5/32 × 29-

29/32) x 2 + (36-7/32 × 66-

5/32 × 29-29/32) x 1

(48-13/16 × 66-5/32 × 29­29/32) x 2 + (36-7/32 × 66­5/32 × 29-29/32) x 1

(48-13/16 × 66-5/32 × 29­29/32) x 2 + (36-7/32 × 66­5/32 × 29-29/32) x 1

(48-13/16 × 66-5/32 × 29­29/32) x 2 + (36-7/32 × 66­5/32 × 29-29/32) x 1

Piping Conections

mm(inch)
mm(inch)

46 48 50 52

64 64 64 64

Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4)

Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8)

Unit

3 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN540LTS4 A(B)RUN560LTS4 A(B)RUN580LTS4 A(B)RUN600LTS4

Independent Unit

A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4

A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4

A(B)RUN140LTS4 A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4
Refrigerant Precharged
Amount

kg (10 × 2) + 8.5 (10 × 2) + 8.5 (10 × 2) + 8.5 10 x 3

lbs (22 × 2) + 18.7 (22 × 2) + 18.7 (22 × 2) + 18.7 22 x 3

Number of maxmum connectable indoor units

Net Weight

kg

(280 × 2) + (235 × 1) (280 × 2) + (235 × 1) (280 × 2) + (270 × 1)

280 × 3

lbs

(617 × 2) + (518 × 1) (617 × 2) + (518 × 1) (617 × 2) + (595 × 1)

617 × 3

Dimensions (WxHxD)

mm

(1,240x1,680x760) x 3

(1,240×1,680×760) × 3 (1,240×1,680×760) × 3 (1,240×1,680×760) × 3

inch

(48-13/16 × 66-5/32

× 29-29/32) x 3

(48-13/16 × 66­5/32 × 29-29/32) x 3

(48-13/16 × 66-5/32 × 29­29/32) x 3

(48-13/16 × 66-5/32 × 29­29/32) x 3

Piping Conections

mm(inch)
mm(inch)

54 56 58 60

64 64 64 64

Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4) Ø 19.05(3/4)

Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8) Ø 41.3(1-5/8)

Unit

4 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN620LTS4 A(B)RUN640LTS4 A(B)RUN660LTS4 A(B)RUN680LTS4

Independent Unit

A(B)RUN180LTS4 A(B)RUN180LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4

A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN180LTS4 A(B)RUN200LTS4

A(B)RUN140LTS4 A(B)RUN140LTS4 A(B)RUN160LTS4 A(B)RUN140LTS4

A(B)RUN140LTS4 A(B)RUN140LTS4 A(B)RUN140LTS4 A(B)RUN140LTS4
Refrigerant Precharged
Amount

kg 8.5 x 4 8.5 x 4 8.5 x 4

(10 × 2) + (8.5 × 2)

lbs 18.7 x 4 18.7 x 4 18.7 x 4

(22 × 2) + (18.7 × 2)

Number of maxmum connectable indoor units

Net Weight

kg

(270 × 1) + (235 × 3) (270 × 2) + (235 × 2) (270 × 2) + (235 × 2) (280 × 2) + (235 × 2)

lbs

(595 × 1) + (518 × 1) (595 × 2) + (518 × 2) (595 × 2) + (518 × 2) (617 × 2) + (518 × 2)

Dimensions (WxHxD)

mm

(1,240x1.680x760) x 4

(1,240×1,680×760) × 4 (1,240×1,680×760) × 4 (1,240×1,680×760) × 4

inch

(48-13/16 × 66-5/32

× 29-29/32) x 4

(48-13/16 × 66­5/32 × 29-29/32) x 4

(48-13/16 × 66-5/32 ×
29-29/32) x 4

(48-13/16 × 66-5/32 ×
29-29/32) x 4

Piping Conections

mm(inch)
mm(inch)

62 64 66 68

64 64 64 64

Ø 22.2(7/8) Ø 22.2(7/8) Ø 22.2(7/8) Ø 22.2(7/8)

Ø 44.5(1-3/4) Ø 44.5(1-3/4) Ø 53.98(2-1/8) Ø 53.98(2-1/8)

12

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

4 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN700LTS4 A(B)RUN720LTS4 A(B)RUN740LTS4 A(B)RUN760LTS4

Independent Unit

A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4
A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4 A(B)RUN200LTS4
A(B)RUN160LTS4 A(B)RUN180LTS4 A(B)RUN180LTS4 A(B)RUN180LTS4

A(B)RUN140LTS4 A(B)RUN140LTS4 A(B)RUN160LTS4 A(B)RUN180LTS4
Refrigerant Precharged
Amount

kg

(10 × 2) + (8.5 × 2) (10 × 2) + (8.5 × 2) (10 × 2) + (8.5 × 2) (10 × 2) + (8.5 × 2)

lbs

(22 × 2) + (18.7 × 2) (22 × 2) + (18.7 × 2) (22 × 2) + (18.7 × 2) (22 × 2) + (18.7 × 2)
Number of maxmum connectable indoor units

Net Weight

kg

(280 × 2) + (235 × 2)

(280 × 2) + (270 × 1) + (235 × 1) (280 × 2) + (270 × 1) + (235 × 1)

(280 × 2) + (270 × 2)

lbs

(617 × 2) + (518 × 2)

(617 × 2) + (595 × 1) + (518 × 1) (617 × 2) + (595 × 1) + (518 × 1)

(617 × 2) + (595 × 2)

Dimensions (WxHxD)

mm

(1,240×1,680×760) × 4 (1,240×1,680×760) × 4 (1,240×1,680×760) × 4 (1,240×1,680×760) × 4

inch

(48-13/16 × 66-5/32

× 29-29/32) x 4

(48-13/16 × 66-5/32
× 29-29/32) x 4

(48-13/16 × 66-5/32
× 29-29/32) x 4

(48-13/16 × 66-5/32
× 29-29/32) x 4

Piping Conections

mm(inch)
mm(inch)

70 72 74 76

64 64 64 64

Ø 22.2(7/8) Ø 22.2(7/8) Ø 22.2(7/8) Ø 22.2(7/8)

Ø 53.98(2-1/8) Ø 53.98(2-1/8) Ø 53.98(2-1/8) Ø 53.98(2-1/8)

Unit

4 Outdoor Unit

System(HP)

Model

Combination Unit

A(B)RUN780LTS4 A(B)RUN800LTS4

Independent Unit

A(B)RUN200LTS4 A(B)RUN200LTS4
A(B)RUN200LTS4 A(B)RUN200LTS4
A(B)RUN200LTS4 A(B)RUN200LTS4

A(B)RUN180LTS4 A(B)RUN200LTS4
Refrigerant Precharged
Amount

kg (10 × 3) + (8.5 × 1) 10 x 4

lbs (22 × 3) + (18.7 × 1) 22 x 4

Number of maxmum connectable indoor units

Net Weight

kg (280 × 3) + (270 × 1) 280 × 4

lbs (617 × 3) + (595 × 1) 617 × 4

Dimensions (WxHxD)

mm
inch

Piping Conections

mm(inch)
mm(inch)

78 80

64 64

(1,240×1,680×760) × 4 (1,240×1,680×760) × 4

(48-13/16 × 66-5/32 × 29-29/32) x 4 (48-13/16 × 66-5/32 × 29-29/32) x 4

Ø 22.2(7/8) Ø 22.2(7/8)

Ø 53.98(2-1/8) Ø 53.98(2-1/8)

Unit
System(HP)

Model

Combination Unit

Independent Unit
Refrigerant Precharged
Amount

kg

lbs

Number of maxmum connectable indoor units

Net Weight

kg

lbs

Dimensions (WxHxD)

mm
inch

Piping Conections

mm(inch)
mm(inch)

1 Outdoor Unit

22
A(B)RUN220LTN4
A(B)RUN220LTN4

10

22

35(44)
280 X 1
617 X 1

(1,240×1,680×760)×1

(48-13/16×66-5/32×29-29/32)x1

15.88(5/8)

28.58(1 1/8)

Model Name : A(B)RUN***LTN4

ENVIRONMENT-FRIENDLY ALTERNATIVE REFRIGERANT R410A

13

ENGLISH

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.

The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and
this characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP)
of R410A is 0. These days the developed countries have approved it as the environment-friendly
refrigerant and encouraged to use it widely to prevent environment pollution.

!

ENVIRONMENT-FRIENDLY ALTERNATIVE RE­FRIGERANT R410A

14

SELECT THE BEST LOCATION

ENGLISH

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

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors by noise from unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• With space for air passage and service work shown next

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

• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.

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

• It is recommended to fence round the outdoor unit in order to prevent any person or animal
from accessing the outdoor unit.

• If installation site is area of heavy snowfall, then the following directions should be observed.

- Make the foundation as high as possible.

- Fit a snow protection hood.

• Select installation location considering following conditions to avoid bad condition when addi­tionally performing defrost operation.

- Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of in-

stalling the product at a place With a high humidity in winter (near beach, coast, lake, etc.)
(Ex : Rooftop where there is always sunshine.)

SELECT THE BEST LOCATION

INSTALLATION SPACE

15

ENGLISH

Individual Installation

During the installation of the unit, consider service, inlet, and outlet and acquire the minimum
space as shown in the figures below.

Category Installation Space

Case 1

(10mm≤Side Space≤49mm)

Case 2

(Side Space≥49mm)

4 sides

are walls

Only 2

sides are

walls

Limita-

tions on

the

height of

the wall

(Refer to

4 side

walls)

A

C

B

D

A E

B

D

A

C

B

D

E

C

AE

B

D

A

C

B

D

E

C

A E

B

F

C

D

AE

B

D

A

C

B

D

E

C

AE

B

F

C

D

A E

B

F

C

D

AE

B

D

A

C

B

D

E

C

AE

B

F

C

D

AE

B

F

C

D

A

B

AE

B

D

A

C

B

D

E

C

AE

B

F

C

D

AE

B

F

C

D

A

E

B

A

B

E

AE

B

D

A

C

B

D

E

C

AE

B

F

C

D

AE

B

F

C

D

A

E

B

A

B

E

h2

h1

1500

A

B

500

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

• The height of the wall on the inlet side must be 500mm or less.

• There is no limit to the wall on the side.

• If the height of the walls on the front and the side are higher than the limit,
there must be additional space on the front and the side.

- Additional Space on the front side by 1/2 of h1.

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

- h1 = A(Actual height) - 1500

- h2 = B(Actual height) - 500

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

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

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

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

A≥10
B≥300

A≥200
B≥300
E≥400

INSTALLATION SPACE

16

INSTALLATION SPACE

ENGLISH

Seasonal wind and cautions in winter

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

• Get ready for seasonal wind or snow in winter even in other areas.

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

• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes
on the air suction hole, the system may malfunction. If it is installed at snowy area, attach the
hood to the system.

• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (an­nual average snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm, always
remove snow for operation.

- The height of H frame must be more than 2 times the snowfall and its width shall not ex­ceed the width of the product. (If width of the frame is wider than that of the product,
snow may accumulate)

- Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal
wind.

LIFTING METHOD

17

ENGLISH

CAUTION

Be very careful while carrying the product.

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

• PP bands are used to pack some products. Do not use them as a mean for transportation
because they are dangerous.

• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in
your hands.

• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise
plastic packaging bag may suffocate children to death.

• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting
with 3-point
support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 8 m long.

• Place extra cloth or boards in the locations where the casing comes in contact with the
sling to prevent damage.

• Hoist the unit making sure it is being lifted at its center of gravity.

• When carrying the suspended, unit pass the ropes under the unit and use the two suspension
points each at the front and rear.

• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.

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

Locking points for

transportation ropes

!

LIFTING METHOD

Forklift Carrying Hole

Forklift Carrying Guide

18

INSTALLATION

ENGLISH

The location of the Anchor bolts

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

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

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

• Anchor bolts must be inserted at least 75mm.

Chassis Outdoor Unit Capacity A(mm) B(mm)

UX2 8~12 HP 920 792
UX3 14~20 HP 1240 1102

INSTALLATION

For outdoor units should not
be supported only by the
corner supports.

6565

At least 100mm

At least 100mm

At least 100mm

At least 100m

At least 65At least 65

At least 100mm

Center of the Unit

At least 100mm

m

Center of the Unit

Unit : mm

730

760

INSTALLATION

19

ENGLISH

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

Unit : mm

200

75

75

200

100

Ⓐ The corner part must be fixed firmly. Otherwise,

the support for the installation may be bent.

Ⓑ Get and use M10 Anchor bolt.
Ⓒ Put Cushion Pad between the outdoor unit and

ground support for the vibration protection in wide
area.

Ⓓ Space for pipes and wiring (Pipes and wirings for

bottom side)

Ⓔ H-beam support
Ⓕ Concrete support

CAUTION

• Be sure to remove the Pallet(Wood Support) of the
bottom side of the outdoor unit Base Pan before fix­ing the bolt. It may cause the unstable state of the
outdoor settlement, and may cause freezing of the
heat exchanger resulting in abnormal operations.

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

WARNING

• Install where it can sufficiently support the weight of the outdoor unit.
If the support strength is not enough, the outdoor unit may drop and hurt people.

• Install where the outdoor unit may not fall in strong wind or earthquake.
If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.

• Please take extra cautions on the supporting strength of the ground, water outlet treat­ment(treatment of the water flowing out of the outdoor unit in operation), and the pas­sages of the pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water
outlet. The tube or pipe may freeze and the water may not be drained.

Pallet(Wood Support)

- Remove before Installation

!

!

20

INSTALLATION

ENGLISH

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 outdoor unit.

- Cut the pipes a little longer than measured
distance.

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

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.

Flaring work

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

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

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.

Indoor unit
[kW(Btu/h]

Pipe " A "

Gas Liquid Gas Liquid

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

Copper

tube

90

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Preparation of Piping

INSTALLATION

21

ENGLISH

Flare shape and flare nut tightening torque

Opening shutoff valve

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.

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

2 Turn it until the shaft stops.

Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the
valve is not a backseat type. Always use the special tool.

3 Make sure to tighten the cap securely.

pipe size

tightening torque(N.cm)

A(mm) flare shape

Ø9.52 38±4 12.8-13.2

Ø12.7 55±6 16.2-16.6

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.

• 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.

Union

!

2

90

45

A

R=0.4~0.8

2

22

INSTALLATION

ENGLISH

Insulation of shutoff valve

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.

Closing shutoff valve

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

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

3 Make sure to tighten the cap securely.

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

Tightening torque

Shutoff

valve size

Tightening torque N.m(Turn clockwise to close)

Shaft(valve body) Cap(Valve lid) Service port Flare nut

Gas line piping attached to unit

Ø6.35

6±0.6

Hexagonal

wrench 4mm

29.4±2.9

12.7±2

16±2

-

Ø9.52 38±4
Ø12.7 9±0.9

53.9±5.8

55±6

Ø15.88 15±1.5

Hexagonal

wrench 6mm

75±7

Ø22.2

30±3

Hexagonal

wrench 10mm

- 25±3

Ø25.4

Indoor unit

Fastening band
(accessory)

Refrigerant piping

Thermal insulator
(accessory)

INSTALLATION

23

ENGLISH

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.

Refrigerant piping on three principles

Drying Cleanliness Airtight

Should be no moisture inside No dust inside.

There is no refrigerant leak-

age

Items

Moisture

Dust

Leakage

Cause
failure

- Significant hydrolysis of re­frigerant oil

- Degradation of refrigerant
oil

- Poor insulation of the com­pressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Degradation of refrigerant
oil

- Poor insulation of the com­pressor

- Do not cold and warm

- Clogging of EEV, Capillary

- Gas shortages

- Degradation of refrigerant
oil

- Poor insulation of the com­pressor

- Do not cold and warm

Counter­measure

- No moisture in the pipe

- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.

- Stop plumbing at rainy day.

- Pipe entrance should be
taken side or bottom.

- When removal burr after
cutting pipe, pipe entrance
should be taken down.

- Pipe entrance should be
fitted cap when pass
through the walls.

- No dust in the pipe.

- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.

- Pipe entrance should be
taken side or bottom.

- When removal burr after
cutting pipe, pipe entrance
should be taken down.

- Pipe entrance should be
fitted cap when pass
through the walls.

- Airtightness test should
be.

- Brazing operations to com­ply with standards.

- Flare to comply with stan­dards.

- Flange connections to
comply with standards.

24

INSTALLATION

ENGLISH

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.

1 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.

2 Always use a pressure reducing valve.

3. 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 anti­oxidants, ants nest corrosion occurs. (causes of organic acid  alcohol + copper + water +
temperature)

CAUTION

!

Regulator

Welding Point

Nitrogen gas
Pressure 0.02MPa less

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.

Taping

(Should not

contain air)

Auxiliary valve

Nitrogen

REFRIGERANT PIPING INSTALLATION

25

ENGLISH

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the
refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor
unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the
branching parts.

- Use hexagonal wrench to open/close the valve.

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)

!

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas leakage after the work.

!

REFRIGERANT PIPING INSTALLATION

Service Port

Liquid pipe

Gas pipe

Refrigerant

Charging Port

26

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

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

- The outdoor unit supports at the bottom shall have width of at least 100mm under the Unit’s
legs before being fixed.

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

- Anchor bolts must be inserted at least 75mm.

Nitrogen
Direction

Preparation Work

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

CAUTION

• Do not give damage to the pipe/base during the Knock Out work.

• Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when connecting wires using knock
Outs.

!

PIPE CONNECTIONS BETWEEN INDOOR AND
OUTDOOR UNIT

Regulator

Valve

Nitrogen

Left Side Pipe

Draw Out

Right Side Pipe
Draw Out

Front Pipe Draw Out

Refrigerant Pipe

Nitrogen

Nitrogen
Direction

Direction

Taping

Removal Area for Liquid/Gas pipe
bottom side connections.

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

27

ENGLISH

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe
work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether the liquid/gas pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front side pipe drawing out.

Service Port

Liquid pipe

Gas pipe

Leakage Prevention Cap

Refrigerant Charging Port

Pipe Knock Out for
Liquid/Gas pipes