LG UUA1 INSTALLATION MANUAL

MFL71675701

Rev.00_101520

INSTALLATION MANUAL

AIR
CONDITIONER

www.lg.com

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.

[

Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[

Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si,

Gyeongsangnam-do, KOREA

Single Inverter Outdoor Unit

Original instruction (R32)

Copyright © 2019 - 2020 LG Electronics Inc. All Rights Reserved.

ENGLISH

ITALIANO ESPAÑOL

FRANÇAIS DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

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MODEL DESIGNATION

MODEL DESIGNATION

Product information

- Product Name : Air conditioner

- Model Name :

U31 0UU D

Serial number

Outdoor unit chassis name

Electrical rating
1 : 1Ø, 220-240V, 50Hz
3 : 3Ø, 380-415V, 50Hz

Module name &
Nominal capacity range
based on ‘kBtu/h’
A : 9~18
B : 18~30
C : 24~36
D : 36~60

Type
U : Outdoor unit

Model Type
U : Universal model

- Additional Information : serial number is
refer to the barcode on the product.

- Max allowable pressure High side :

4.2 MPa / 4.32 MPa (it can be different by
model)

- Max allowable pressure Low side : 2.4 MPa

- Refrigerant : R32

Airborne Noise Emission

The A-weighted sound pressure emitted by
this product is below 70 dB.

** The noise level can vary depending on the
site.

The figures quoted are emission level and are
not necessarily safe working levels.

Whilst there is a correlation between the
emission and exposure levels, this cannot be
used reliably to determine whether or not
further precautions are required.

Factor that influence the actual level of
exposure of the workforce include the
characteristics of the work room and the other
sources of noise, i.e. the number of
equipment and other adjacent processes and
the length of time for which an operator
exposed to the noise. Also, the permissible
exposure level can vary from country to
country.

This information, however, will enable the
user of the equipment to make a better
evaluation of the hazard and risk.

TIPS FOR SAVING ENERGY

TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:

• Excessive cooling may be harmful to 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 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.

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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 labeled on the side of each unit.

Dealer’s name :

Date of purchase :

IMPORTANT SAFETY INSTRUCTIONS

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IMPORTANT SAFETY INSTRUCTIONS

Read the precautions in this manual
carefully before operating the unit.

This symbol indicates that the
Operation Manual should be read
carefully.

This appliance is filled with
flammable refrigerant. (for R32)

This symbol indicates that a service
person should be handling this
equipment with reference to the
Installation Manual.

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

!

Serious injury or death can result if directions are ignores.

CAUTION

!

Minor injury or product damage can result if directions are
ignored.

WARNING

!

• Installation or repairs made by unqualified persons can result
in hazards to you and others.
Refrigeration work must be performed by a qualified person
who is "F-Gas" registered.

• Installation work must be performed in accordance with the
National Electric Code by qualified and authorized personnel
only.

• 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.

IMPORTANT SAFETY INSTRUCTIONS

• Failure to carefully read and follow all instructions in this
manual can result in equipment malfunction, property
damage, personal injury and/or death. (for R32)

• Compliance with national gas regulations shall be observed

Installation

• Do not use a defective or underrated circuit breaker. Use the
correctly rated breaker and fuse. There is risk of fire or electric
shock.

• For electrical work, contact the dealer, seller, a qualified
electrician, or an Authorized Service Center. Do not
disassemble or repair the product by yourself. There is risk of
fire or electric shock.

• Always ground the product as per the wiring diagram. Do not
connect the ground wire to gas or water pipes lightening rod
or telephone ground wire. There is risk of fire or electric
shock.

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• Install the panel and the cover of control box securely. There
is risk of fire or electric shock due to dust , water etc.

• Use the correctly rated breaker or fuse. There is risk of fire or
electric shock.

• Do not modify or extend the power cable. If power cable is
damaged or has deteriorated, then it must be replaced. There
is risk of fire or electric shock.

• For installation, removal or reinstall , always contact the dealer
or an Authorized Service Center. There is risk of fire, electric
shock, explosion, or injury.

• Do not install the product on a defective installation stand. Be
sure that the installation area does not deteriorate with age.
It may cause product to fall.

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IMPORTANT SAFETY INSTRUCTIONS

• Never install the outdoor unit on a moving base or a place
from where it can fall down.
The falling outdoor unit can cause damage or injury or even
death of a person.

• In outdoor unit the step-up capacitor supplies high voltage
electricity to the electrical components. Be sure to discharge
the capacitor completely before conducting the repair work.
A charged capacitor can cause electrical shock.

• When installing the unit, use the installation kit provided with
the product. Otherwise the unit may fall and cause severe
injury.

• Indoor/outdoor wiring connections must be secured tightly
and the cable should be routed properly so that there is no
force pulling the cable from the connection terminals.
Improper or loose connections can cause heat generation or
fire.

• Safely dispose off the packing materials. Like screws, nails,
batteries, broken things etc after installation or svc and then
tear away and throw away the plastic packaging bags.
Children may play with them and cause injury.

• Be sure to check the refrigerant to be used. Please read the
label on the product. Incorrect refrigerant used can prevent
the normal operation of the unit.

• Do not turn on the breaker or power under condition that front
panel, cabinet, top cover, control box cover are removed or
opened. Otherwise, it may cause fire, electric shock,
explosion or death.

• 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.

IMPORTANT SAFETY INSTRUCTIONS

• The appliance shall be stored in a room without continuously
operating ignition sources
(for example: open flames, an operating gas appliance or an
operating electric heater)

• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.

• Do not pierce or burn refrigerant cycle part.

• Be aware that refrigerants may not contain an odour.

• Keep any required ventilation openings clear of obstruction.

• The appliance shall be stored in a well-ventilated area where
the room size corresponds to the room area as specified for
operation. (for R32)

• The appliance should only be transported by two or more
people holding the appliance.

• Mechanical connections shall be accessible for maintenance
purposes.

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• The appliance shall be disconnected from its power source
during service and when replacing parts.

• The appliance shall be installed in accordance with national
wiring regulations.

Operation

• When the product is soaked (flooded or submerged) in water,
contact an Authorized Service Center for repair before using it
again. There is risk of fire or electric shock.

• Be sure to use only those parts which are listed in the svc
parts list. Never attempt to modify the equipment. The use of
inappropriate parts can cause an electrical shock, excessive
heat generation or fire.

• Do not touch , operate, or repair the product with wet hands.
Hold the plug by hand when taking it out. There is risk of
electric shock or fire.

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IMPORTANT SAFETY INSTRUCTIONS

• Do not place a heater or other heating appliances near the
power cable. There is risk of fire and electric shock.

• Do not allow water to run into electric parts. Install the unit
away from water sources. There is risk of fire, failure of the
product, or electric shock.

• Do not store or use or even allow flammable gas or
combustibles near the product. There is risk of fire.

• Do not use the product in a tightly closed space for a long
time. Perform ventilation regularly. Oxygen deficiency could
occur and hence harm your health.

• Do not open the front 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.

• If strange sound, smell or smoke comes from product.
Immediately turn the breaker off or disconnect the power
supply cable. There is risk of electric shock or fire.

• Ventilate the product room from time to time when operating
it together with a stove, or heating element etc. Oxygen
deficiency can occur and hence harm your health.

• When the product is not to be used for a long time,
disconnect the power supply plug or turn off the breaker.
There is risk of product damage or failure, or unintended
operation.

• Take care to ensure that nobody especially kids could step on
or fall onto the outdoor unit. This could result in personal
injury and product damage.

• Take care to ensure that power cable could not be pulled out
or damaged during operation. There is risk of fire or electric
shock.

• Do not place ANYTHING on the power cable. There is risk of
fire or electric shock.

IMPORTANT SAFETY INSTRUCTIONS

• When flammable gas leaks, turn off the gas and open a
window for ventilation before turning on the product. Do not
use the telephone or turn switches on or off. There is risk of
explosion or fire.

• Keep any required ventilation openings clear of obstruction

• Turn off all devices that cause fire when the refrigerant leaks.,
ventilate the room (example : opening the window or using
the ventilation), and contact with dealer who you purchased
the unit.

CAUTION

!

Installation

• Two or more people must lift and transport the product. Avoid
personal injury.

• Do not install the product where it will be exposed to sea
wind (salt spray) directly. It may cause corrosion on the
product.

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• Install the drain hose to ensure that the condensed water is
drained away properly. A bad connection may cause water
leakage.

• Keep level even when installing the product. To avoid
vibration or noise.

• Do not install the product where the noise or hot air from the
outdoor unit could damage or disturb the neighborhoods. It
may cause a problem for your neighbors and hence dispute.

• Always check for gas (refrigerant) leakage after installation or
repair of product. Low refrigerant levels may cause failure of
product.

• Please install safely at a place that can sufficiently endure the
weight of the product.
If the strength is not sufficient, the product may fall and cause
injury.

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IMPORTANT SAFETY INSTRUCTIONS

•

Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry-accredited assessment authority, which authorizes their
competence to handle refrigerants safely in accordance with an
industry recognized assessment specification.

(for R32)

• Wear adequate personal protection equipment (PPE) when
installing, maintaining or servicing the product.

•

This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities or
lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance.

• Pipe-work shall be protected from physical damage.

• Do not install the unit in potentially explosive atmospheres.

Operation

• 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.

• Do not block the inlet or outlet of air flow. It may cause
product failure.

• Use a soft cloth to clean. Do not use harsh detergents,
solvents or splashing water etc. There is risk of fire, electric
shock, or damage to the plastic parts of the product.

• Do not touch the metal parts of the product when removing
the air filter. There is risk of personal injury.

• Do not step on or put anything on the product. (outdoor units)
There is risk of personal injury and failure of product.

IMPORTANT SAFETY INSTRUCTIONS

• Always insert the filter securely after cleaning. Clean the filter
every two weeks or more often if necessary. A dirty filter
reduces the efficiency.

• Do not insert hands or other objects through the air inlet or
outlet while the product is operating. There are sharp and
moving parts that could cause personal injury.

• Be cautious when unpacking and installing the product. Sharp
edges could cause injury.

• If the refrigerant gas leaks during repair, do not touch the
leaking refrigerant gas. The refrigerant gas can cause frostbite
(cold burn).

• Do not tilt the unit when removing or uninstalling it. The
condensed water inside can spill.

•

Do not mix air or gas other than the specified refrigerant used in
the system. If air enters the refrigerant system, an excessively
high pressure results, causing equipment damage or injury.

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• If the refrigerant gas leaks during the installation, ventilate the
area immediately. Otherwise it can be harmful for your health.

• Dismantling the unit, treatment of the refrigerant oil and
eventual parts should be done in accordance with local and
national standards.

• Replace all batteries in the remote control with new ones of
the same type. Do not mix old and new batteries or different
types of batteries. There is risk of fire or product failure.

• Do not recharge or disassemble the batteries. Do not dispose
off batteries in a fire. They may burn or explode.

• If the liquid from the batteries gets onto your skin or clothes,
wash it well with clean water. Do not use the remote if the
batteries have leaked. The chemicals in batteries could cause
burns or other health hazards.

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IMPORTANT SAFETY INSTRUCTIONS

• If you eat the liquid from the batteries, brush your teeth and
see doctor. Do not use the remote if the batteries have
leaked. The chemicals in batteries could cause burns or other
health hazards.

• Do not let the air conditioner run for a long time when the
humidity is very high and a door or a window is left open.
Moisture may condense and wet or damage furniture.

• Do not expose your skin or kids or plants to the cool or hot
air draft. This could harm to your health.

• Do not drink the water drained from the product. It is not
sanitary and could cause serious health issues.

• Use a firm stool or ladder when cleaning, maintaining or
repairing the product at height. Be careful and avoid personal
injury.

• The appliance shall be stored so as to prevent mechanical
damage from occurring.

• Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring
the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of
flammable refrigerants. (for R32)

• This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have
been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without
supervision.

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

TABLE OF CONTENTS

2 MODEL DESIGNATION

3 TIPS FOR SAVING ENERGY

4 IMPORTANT SAFETY INSTRUCTIONS

14 INSTALLATION

15 INSTALLATION OF OUTDOOR UNIT

21 CONNECTING PIPES

21 Preparation of Piping
22 Connection of piping - Outdoor
23 Forming the piping

24 WIRING CONNECTION

24 Electrical Wiring
24 Connecting Cables between Indoor Unit and Outdoor Unit
27 Connecting the cable to Outdoor Unit

28 LEAKAGE TEST AND EVACUATION

28 Preparation
28 Leakage test
29 Evacuation

TABLE OF CONTENTS

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30 TEST RUNNING

32 INSTALLATION PI485

33 FUNCTION

33 DIP S/W Setting
35 Pump Down
36 Saving Power Consumption
37 Night Quiet Mode
38 Mode Lock

40 INSTALLATION GUIDE AT THE SEASIDE

41 SEASONAL WIND AND CAUTIONS IN WINTER