LG A3UW21GFA2 installation manual
INSTALLATION MANUAL
AIR
CONDITIONER
MFL67855426
Rev.01_042219
www.lg.com
Copyright © 2014 - 2019 LG Electronics Inc. All Rights Reserved.
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.
Ɠ
This product contains Fluorinated Greenhouse Gases. (R410A)
MULTI
Original instruction
ENGLISH
FRANÇAIS
IMPORTANT SAFETY INSTRUCTIONS
2
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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.
• 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.
• Failure to carefully read and follow all instructions in this manual can result
in equipment malfunction, property damage, personal injury and/or death.
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.
• 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.
IMPORTANT SAFETY INSTRUCTIONS
3
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• Do not modify or extend the power cable. If the power cable or cord has
scrathes or skin peeled off or 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.
• 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.
An 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.
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 eletric 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.
IMPORTANT SAFETY INSTRUCTIONS
4
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• Do not touch , operate, or repair the product with wet hands. Hold the
plug by hand when taking out. There is risk of electric shock or fire.
• 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.
• When flammable gas leaks, turn off the gas and open a window for
ventilation befor turning on the product. Do not use the telephone or turn
switches on or off. There is risk of explosion or fire.
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.
IMPORTANT SAFETY INSTRUCTIONS
5
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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.
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.
• 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 the repair, do not touch the leakaing
refrigerant gas. The refrigernat 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.
IMPORTANT SAFETY INSTRUCTIONS
6
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• If the refrigerant gas leaks during the installation, ventilate the area
immediately. Otherwise it can be harmfull 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 the 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.
• 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 an height. Be careful and avoid personal injury.
TABLE OF CONTENTS
TABLE OF CONTENTS
2 IMPORTANT SAFETY INSTRUCTIONS
8 INSTALLATION
9 INSTALLATION OF INDOOR, OUTDOOR UNIT
9 Select the best location
10 Fixing Installation Plate
11 Piping length and elevation
11 Refrigerant charge
12 Preparing work for Installation (ART COOL Type Only)
13 Drill a hole in the wall
13 INSTALLATION OF WIRED REMOTE CONTROLLER
15 Wired remote controller installation
16 FLARING WORK AND CONNECTION OF PIPING
16 Flaring work
17 Connection of piping - Indoor
19 Connection of piping - Outdoor
20 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND
OUTDOOR UNIT
20 Connect the cable to the Indoor unit
22 Connect the cable to the Outdoor unit
24 CHECKING THE DRAINAGE AND FORMING THE PIPINGS
24 Checking the Drainage
25 Forming the Piping
26 AIR PURGING AND EVACUATION
26 Checking method
27 Evacuation
28 PANEL FRONT ASSEMBLY (ART COOL TYPE ONLY)
29 INSTALLATION PI485
30 TEST RUNNING
31 FUNCTION
31 DIP S/W Setting
32 Forced Cooling Operation
33 Wiring Error Check
33 Saving Power Consumption
34 Night Quiet Mode
35 Mode Lock
35 SLC (Smart Load Control) Mode
36 PCB Display(14/16/18/21k Model Only)
37 MAX COMBINATION CAPACITY
38 INSTALLATION GUIDE AT THE SEASIDE
38 SEASONAL WIND AND CAUTIONS IN WINTER
39 Model Designation
39 Airborne Noise Emission
39 Limiting concentration
7
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INSTALLATION
Installation plate
Type "B" screws
Type "A" screw (6 EA) Type "A" screw (8 EA) Type "A" screw (7 EA)
Holder Remote Control
Type "A" screw and plastic anchors
8
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INSTALLATION
Installation Parts
Clearance of side discharge unit [Unit : mm(inch)]
Do not install the product where sufficient ventilation is not secured.
The performance may be decreased or the product may not be operated.
300(11-13/16)
or more
500(19-11/16) or less
600(23-19/32)
or more
600(23-19/32) or more
1 000(39-3/8) or more
300(11-13/16)
or more
erom ro )8/3-93(000
500(19-11/16) or less
D
L
1 000(39-3/8)
or more
1
H
300(11-13/16)
or more
h In case of series or another installation, please refer to related PDB.
(39-3/8) or more
000
1
300(11-13/16)
or more
300(11-13/16)
or more
2 000(78-3/4) or more
INSTALLATION OF INDOOR, OUTDOOR UNIT
More than 20 cm
More than
10 cm
More than 2.3 m
More than
10 cm
More than 20 cm
More than
10 cm
More than 2.3 m
More than
10 cm
More than 20 cm
More
than 50 cm
More than 1.5 m
More
than 50 cm
More than 20 cm
More than
10 cm
More than 2.3 m
More than
10 cm
more than
70 cm
more than
30 cm
more than
30 cm
more than
60 cm
more than 60 cm
more than
70 cm
more than
30 cm
more than 60 cm
more than
30 cm
more than
60 cm
INSTALLATION OF INDOOR, OUTDOOR UNIT
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Read completely, then follow step by step.
You need to select adequate installation location
considering the following conditions, and make
sure to acquire the consent of the user.
Select the best location
1 Do not have any heat or steam near the unit.
2 Select a place where there are no obstacles
3 Make sure that condensation drainage can be
4 Do not install near a doorway.
5
6 Use a stud finder to locate studs to prevent
Indoor unit
in front of the unit.
conveniently routed away.
Ensure the spaces indicated by arrows from the
wall, ceiling, fence or other obstacles.
unnecessary damage to the wall.
CAUTION
!
Install the indoor unit on the wall where
the height from the floors more than 2.3
meters. (ART COOL Type Only 1.5 m)
Outdoor unit
1 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.
2 Ensure that the spaces indicated by arrows
around front, back and side of the unit.
3 Do not place animals and plants in the path of
the warm air.
4 Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
5 Select a place so that the warm air and noise
from the air conditioner do not disturb
neighbors.
6 Place that can sufficiently endure the weight
and vibration of the outdoor unit and where
even installation is possible.
7 Place that has no direct influence of snow or
rain.
8 Place with no danger of snowfall or icicle
drop.
9 Place without weak floor or base such as
decrepit part of the building or with a lot of
snow accumulation.
10 Sufficient ventilation is secured.
Rooftop Installations
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof
structure and anchoring method are adequate
for the unit location. Consult local codes
regarding rooftop mounting.
10
Unit
Outline
Left Rear
Piping
Right Rear
Piping
Place a level on raised tab
(Unit : mm)
Installation plate
Ø 65
Ø 65
184
220
156
307
460 567
Installation plate
Left rear piping Right rear piping
Ø 65
Ø 65
105 mm
105 mm
65 mm
55 mm
45 mm
140 mm
Ø 65
65mm65mm
65 mm
45 mm
Ø 65
Installation plate
Left rear piping Right rear piping
Installation plate
Left rear piping Right rear piping
Ø 65
133 mm
101 mm
101 mm
Ø 65
100 mm
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INSTALLATION OF INDOOR, OUTDOOR UNIT
Fixing Installation Plate
The wall you select should be strong and solid
enough to prevent vibration
1 Mount the installation plate on the wall
with type "A" screws. If mounting the unit
on a concrete wall, use anchor bolts.
- Mount the installation plate horizontally
by aligning the centerline using a level.
<Type 1>
2 Measure the wall and mark the centerline.
It is also important to use caution
concerning the location of the installation
plate-routing of the wiring to power outlets
is through the walls typically. Drilling the
hole through the wall for piping
connections must be done safely.
<Type 2>
Indoor Type
Wall mounted
/ART COOL
Mirror
<Type 1>
<Type 2>
<Type 3>
Capacity
(kBtu/h)
Type
5, 7, 9, 12, 15 1, 3
18, 24 2, 4
<Type 3>
<Type 4>
<Type 4>
INSTALLATION OF INDOOR, OUTDOOR UNIT
Piping length and elevation
Multiple Piping Models (Unit: m)
Phase Capacity(kBtu/h) Total Length Max Length(A/B)
14/16 30 20 15 7.5
18 50 25 15 7.5
1Ø
21 50 25 15 7.5
24/27 70 25 15 7.5
30 75 25 15 7.5
40 85 25 15 7.5
Max Elevation
(h1)
In - In Elevation
(h2)
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A
h2
h1
B
Multiple Piping Type
CAUTION
!
Capacity is based on standard length and
maximum allowance length is on the
basis of reliability. If outdoor unit is at
higher elevation than the indoor units,
after 24 m of vertical height, 1 oil trap is
required.
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
Multiple Piping Models (Unit: m)
Phase
• Multiple Piping Models
Capacity
(kBtu/h)
14/16 7.5 20 30 20 20
18 7.5 25 50 22.5 20
1Ø
Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20 g/m
h CF = Max. number of connectable indoor unit – Total number of connected indoor unit
21 7.5 25 50 22.5 20
24/27 7.5 25 70 30 20
30 7.5 25 75 37.5 20
40 7.5 25 85 37.5 20
Standard
Length(m)
+ (B Room Installation Length – Standard Length ) x 20 g/m +.. )
- CF(Correction Factor) x 150
Max Piping for
one room(m)
Max total Piping
Length
Chargeless
Length
Additional
Charge(g/m)
INSTALLATION OF INDOOR, OUTDOOR UNIT
Pipe hole
rubber cap
Only one
desiring direction
Connecting
part
Adhesive
Drain
hose
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Preparing work for Installation (ART COOL Type Only)
Open panel front
1 First, push the front panel backward and lift it up to remove the two screws.
2 The moment of lifting the both lower parts of panel front, you can hear sound this panel came
out, In this time panel front is separated
3 After pull down this panel a bit, and separate connecting wire with product.
Panel Front
Connector
Panel Front
Connector
Remove cover pipe and cover side
1 Remove two screws(for fixing cover pipe)
2 Pull up the cover side of desired connecting direction, then
cover side is separated.
3 In case of connecting direction is left or right, path through
the hole of cover side.
CAUTION
!
After removing the pipe hole, cut the burr
for safety.
When connecting pipe path through rear
wall, don’t remove the hole.
Drain hose junction
1 Remove the rubber stopple of desired direction of drainage.
2 As the following picture, Insert drain hose in the handle of
drain pan, and join drain hose and connecting hose.
!
NOTE
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