LG UU37W INSTALLATION INSTRUCTIONS

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.

INSTALLATION MANUAL

AIR
CONDITIONER

TYPE : Standard inverter

www.lg.com

Copyright © 2015 - 2019 LG Electronics Inc. All Rights Reserved.

MFL69190205

Rev.01_051719

ENGLISH

РУССКИЙ ЯЗЫК

УКРАÏНСЬКА

ҚАЗАҚ ТІЛІ

беларуская мова

O‘ZBEK TILI

Table of contents

TABLE OF CONTENTS

3 SAFETY PRECAUTIONS

6 INSTALLATION OF OUTDOOR UNIT

9 Night Silent Operation setting

10 WIRING CONNECTION

10 Electrical Wiring

10 Connecting Cables between Indoor Unit and Outdoor Unit

12 Connecting the cable to Outdoor Unit

13 CONNECTING PIPES

13 Preparation of Piping

14 Connecting the pipes to the Outdoor unit

16 Forming the piping

17 LEAKAGE TEST AND EVACUATION

17 Preparation

17 Leakage test

18 Evacuation

19 TEST RUNNING

21 FUNCTION

21 Forced Cooling Operation

22 SELF-DIAGNOSIS FUNCTION

22 Error Indicator (Outdoor)

23 INSTALLATION GUIDE AT THE SEASIDE

2 Air Conditioner

Safety Precautions

Safety Precautions

To prevent the injury of the user or other people and property damage, the following instructions
must be followed.

n Be sure to read before installing the air conditioner.
n Be sure to observe the cautions specified here as they include important items related to safety.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

ENGLISH

!

WARNING

!

CAUTION

n The meanings of the symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

!

WARNING

Installation

• Always perform grounding.

- Otherwise, it may cause electrical shock.

• Don’t use a power cord, a plug or a loose socket which is damaged.

- Otherwise, it may cause a fire or electrical shock.

• For installation of the product, always contact the service center or a professional installation
agency.

- Otherwise, it may cause a fire, electrical shock, explosion or injury.

• Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor
unit.

- If the electrical part cover of the indoor unit and the service panel of the outdoor unit are not

attached securely, it could result in a fire or electric shock due to dust, water, etc.

• Always install an air leakage breaker and a dedicated switching board.

- No installation may cause a fire and electrical shock.

• Do not keep or use flammable gases or combustibles near the air conditioner.

- Otherwise, it may cause a fire or the failure of product.

• Ensure that an installation frame of the outdoor unit is not damaged due to use for a long time.

- It may cause injury or an accident.

• Do not disassemble or repair the product randomly.

- It will cause a fire or electrical shock.

• 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.

Installation Manual 3

Safety Precautions

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

• Do not install the product at a place that there is concern of falling down.

- Otherwise, it may result in personal injury.

• Use caution when unpacking and installing.

- Sharp edges may cause injury.

Operation

• Do not share the outlet with other appliances.

- It will cause an electric shock or a fire due to heat generation.

• Do not use the damaged power cord.

- Otherwise, it may cause a fire or electrical shock.

• Do not modify or extend the power cord randomly.

- Otherwise, it may cause a fire or electrical shock.

• Take care so that the power cord may not be pulled during operation.

- Otherwise, it may cause a fire or electrical shock.

• Unplug the unit if strange sounds, smell or smoke comes from it.

- Otherwise, it may cause electrical shock or a fire.

• Keep the flames away.

- Otherwise, it may cause a fire.

• Take the power plug out if necessary, holding the head of the plug and do not touch it with wet
hands.

- Otherwise, it may cause a fire or electrical shock.

• Do not use the power cord near the heating tools.

- Otherwise, it may cause a fire and electrical shock.

• Do not open the suction inlet of the indoor/outdoor unit during operation.

- Otherwise, it may electrical shock and failure.

• Do not allow water to run into electrical parts.

- Otherwise, it may cause the failure of machine or electrical shock.

• Hold the plug by the head when taking it out.

- It may cause electric shock and damage.

• Never touch the metal parts of the unit when removing the filter.

- They are sharp and may cause injury.

• Do not step on the indoor/outdoor unit and do not put anything on it.

- It may cause an injury through dropping of the unit or falling down.

• Do not place a heavy object on the power cord.

- Otherwise, it may cause a fire or electrical shock.

• When the product is submerged into water, always contact the service center.

- Otherwise, it may cause a fire or electrical shock.

• Take care so that children may not step on the outdoor unit.

- Otherwise, children may be seriously injured due to falling down.

4 Air Conditioner

Safety Precautions

!

CAUTION

Installation

• Install the drain hose to ensure that drain can be securely done.

- Otherwise, it may cause water leakage.

• Install the product so that the noise or hot wind from the outdoor unit may not cause any damage
to the neighbors.

- Otherwise, it may cause dispute with the neighbors.

• Always inspect gas leakage after the installation and repair of product.

- Otherwise, it may cause the failure of product.

• Keep level parallel in installing the product.

- Otherwise, it may cause vibration or water leakage.

• Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring
rules.

Operation

• Avoid excessive cooling and perform ventilation sometimes.

- Otherwise, it may do harm to your health.

• Use a soft cloth to clean. Do not use wax, thinner or a strong detergent.

- The appearance of the air conditioner may deteriorate, change color or develop surface flaws.

• Do not use an appliance for special purposes such as preserving animals vegetables, precision
machine or art articles.

- Otherwise, it may damage your properties.

• Do not place obstacles around the flow inlet or outlet.

- Otherwise, it may cause the failure of appliance or an accident.

ENGLISH

Installation Manual 5

More than
300 mm

Installation of Outdoor Unit

Installation of Outdoor Unit

1. Installation Places

• If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.

• Ensure that the spaces indicated by arrows
around front, back and side of the unit.

More than
300 mm

• Do not place animals and plants in the path of
the warm air.

• Take the air conditioner weight into account

Fence or

obstacles

and select a place where noise and vibration
are minimum.

• Select a place so that the warm air and noise
from the air conditioner do not disturb
neighbors.

2. Piping length and the elevation

n Single Operation

Pipe Size

Model Capacity

UU18W 5 kW Ø 12.7(1/2) Ø 6.35(1/4) 7.5 40 5 30 20
UU24W 7 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 50 5 30 40

UU30W 8 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 50 5 30 40
UU36W/UU37W 10 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 50 5 30 40
UU42W/UU43W 12.5 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 75 5 30 40
UU48W/UU49W 14 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 75 5 30 40
UU60W/UU61W 15 kW Ø 15.88(5/8) Ø 9.52(3/8) 7.5 75 5 30 40

mm(inch)

Gas Liquid Standard Max. Standard Max.

Length A(m) Elevation B(m)

Sunroof

More than 700 mm

More than

More than
300 mm

300 mm

More than 600 mm

Unit : mm

Additional
refrigerant

(g/m)

If installed tube is shorter than 7.5 m, additional charging is not necessary.
Additional Refrigerant = (A-7.5)xAdditional refrigerant (g)

6 Air Conditioner

Indoor unit

B

A

Outdoor unit

Indoor unit

Outdoor unit

A

B

Installation of Outdoor Unit

Indoor Unit Refrigerant Additional charging (g)

Duo

Trio

Quartet

Refrigerant = (L1-b)xB+(L2+L3)xC

Refrigerant = (L1-b)xB+(L2+L3+L4)xC

Refrigerant = (L1-b)xB+(L2+L3+L4+L5)xC

C

(g/m)

Pipe Size
mm(inch)

Ø 6.35(1/4)

Ø 9.52(3/8)

35

40

b

(m)

Model

UU42W/UU43W
UU48W/UU49W
UU60W/UU61W

B

(g/m)

7.5 40

n Synchro Operation

Install the branch pipe so that pipe length and difference between high and low will not exceed
below Spec.

L2

L3

L4

L5

H1

Remote

Controller

L1

Branch

A

A

Pipe Length & Height

Total(L1+L2+L3+L4+L5)

Main Pipe(L1)

H2

Branch Pipe (L2+L3+L4+L5)

Each

Indoor-Outdoor (H1)

Indoor-Indoor (H2)

(L1+L2),(L1+L3),(L1+L4),(L1+L5)

A

[Unit : m]

Spec(MAX.)

80

45

40

15

30

1

70

10

• When installing the branch pipe, direction and angle of installation is not limited.

• Take care so that burrs and foreign material may not enter into the cutting surface when
connecting.

• Connect remaining those by cutting or direct insertion to the diameter of pipe.

n Refrigerant Additional Charging Method

For additional charging method, see below table.

ENGLISH

NOTICE

b : Rated performance for refrigerant line length.
C : Additional charging Refrigerant of Branch Liquid Pipe.
B : Additional charging Refrigerant of Main Liquid Pipe.

!

CAUTION

• Capacity is based on standard length and maximum allowance length is on the basis of

• Improper refrigerant charge may result in abnormal cycle.

reliability.

Installation Manual 7

Installation of Outdoor Unit

SW01B

LED01H

DIP SW2

A

B

MAIN PCBMAIN PCB

UU42W/48W/60W UU43W/49W/61W

LED01G
LED02G

SW02N

SW01N

B

A

LED01M
LED02M

6

ODU

BD

IDU IDU

REMO

ODU

BD

IDU IDU IDU

REMO

BD

IDU IDU IDU IDU

ODU

REMO

3. Synchro Combination table

Possible combination of indoor units

Synchro

Duo Trio Quartet

IDU : INDOOR UNIT
ODU : OUTDOOR UNIT
BD : BRANACH

DISTRIBUTOR UNIT

REMO : WIRED

REMOTE
CONTROLLER

MODEL

UU42W/UU43W
UU48W/UU49W
UU60W/UU61W

Bdunit PMUB11A PMUB111A PMUB1111A

Applied

Accessi

ries

NOTICE

Simple central
controller**

Cassette

CT24 NP2R0 CB24 NH2R0 CV24 NJ2R0 CT18 NQ2R0 CB18 NH2R0 CV18 NJ2R0 CT12 NR2R0 - ­CT24 NP2R0 CB24 NH2R0 CV24 NJ2R0 CT18 NQ2R0 CB18 NH2R0 CV18 NJ2R0 CT12 NR2R0 - -

UT30W NP2R0

UB30 NG2R0 UV30 NJ2R0 CT18 NQ2R0 CB18 NH2R0 CV18 NJ2R0 CT12 NR2R0 - -

** When using synchro operation,

- Do not use wireless remote controller.

- Use only one wired remote controller in the indoor units.

- Use Simple central controller "PQCSZ250S0" only.

Duct

Ceiling

Cassette

Suspended

Duct

PQCSZ250S0

Ceiling

Suspended

Cassette

Duct

Ceiling

Suspended

4.

Outdoor Unit PCB Setting Procedure For Simultaneous Operation System

1. SW01N (PIP SW2) Setting

Set the SW01N (PIP SW2) as below Table (Ⓐ)

2. Auto Addressing Method
Addressing work assigns address to each indoor unit. When firstly installing product or replacing
the indoor unit PCB. Auto Addressing work should be done for simultaneous operation.

h Work procedure

1) Set SW01N (PIP SW2) correctly.

2) Turn on main power.

3) Press the SW02N (SW01B) for about 3 seconds within 3 minutes After main power on.(Ⓑ)

8 Air Conditioner