LG A3UQ24GFAB User manual

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.
This product contains Fluorinated Greenhouse Gases. (R410A)
Multi Standard
Original instruction
www.lg.com
ENGLISH ESPAÑOL
PORTUGUÊS
Copyright © 2021 LG Electronics Inc.All Rights Reserved.
MFL70363713
Rev.00_210305

Young children should be supervised to ensure that they do not
play with the air conditioner.

IMPORTANT SAFETY INSTRUCTIONS 3
ENGLISH
• 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, explo-
sion, 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 com-
pletely 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 opera-
tion 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.
• 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.

4IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
• 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 dam-
aged 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 person-
al 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
ENGLISH
• 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 prob-
lem 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 preci-
sion 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 fail-
ure.
• 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 fil-
ter. There is risk of personal injury.
• Do not step on or put anyting 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 effi-
ciency.
• 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.

User must carry routine checkup & cleaning to avoid unit’s poor
performance.In case of special situation, the job must be carried out by
service person only.

TABLE OF CONTENTS 7
ENGLISH
2IMPORTANT SAFETY
INSTRUCTIONS
8INSTALLATION
9INSTALLATION OF
INDOOR, OUTDOOR
UNIT
9Select the best location
10 Fixing Installation Plate
11 Piping length and elevation
11 Refrigerant charge
11 Drill a hole in the wall
12 FLARING WORK AND
CONNECTION OF PIPING
12 Flaring work
13 Connection of piping - Indoor
15 Connection of piping - Outdoor
16 CONNECTING THE CABLE
BETWEEN INDOOR UNIT
AND OUTDOOR UNIT
16 Connect the cable to the Indoor unit
18 Connect the cable to the Outdoor unit
20 CHECKING THE
DRAINAGE AND FORM-
ING THE PIPINGS
20 Checking the Drainage
21 Forming the Piping
22 AIR PURGING AND EVAC-
UATION
22 Checking method
23 Evacuation
24 TEST RUNNING
25 FUNCTION
25 Dip S/W Setting
26 Forced Cooling Operation
27 Wiring Error Check
28 Saving Power Consumption
28 Night Quiet Mode
29 Mode Lock
30 MAX COMBINATION
CAPACITY
31 INSTALLATION GUIDE AT
THE SEASIDE
31 SEASONAL WIND AND
CAUTIONS IN WINTER
32 Airborne Noise Emission
32 Limiting concentration
TABLE OF CONTENTS

8INSTALLATION
ENGLISH
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.
In case of series or another installation, please refer to related PDB.
300(11-13/16)
or more
300(11-13/16)
300(11-13/16)
00(10 eromro)8/3-93
600(23-19/32)
or more
500(19-11/16) or less
or more
or more
L
D
Hreor m1000(39-3/8) o
1000(39-3/8)
or more
500(19-11/16) or less
300(11-13/16)
or more
600(23-19/32) or more
1000(39-3/8) or more
2000(78-3/4) or more
300(11-13/16)
or more
500(19-11/16) or less
INSTALLATION

INSTALLATION OF INDOOR, OUTDOOR UNIT 9
ENGLISH
Install the indoor unit on the wall where
the height from the floors more than 2.3
meters. (ART COOL Type Only 1.5m)
CAUTION
!
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
in front of the unit.
3 Make sure that condensation drainage can be
conveniently routed away.
4
Do not install near a doorway.
5 Ensure the spaces indicated by arrows from the
wall, ceiling, fence or other obstacles.
6 Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
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 neigh-
bors.
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.
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof struc-
ture and anchoring method are adequate for the
unit location. Consult local codes regarding
rooftop mounting.
Indoor unit
Outdoor unit
Rooftop Installations
INSTALLATION OF INDOOR, OUTDOOR UNIT
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
More than 20cm
More than
10cm
More than 2.3m
More than
10cm
more than
70cm
more than
30cm
more than 60cm
more than
30cm
more than
60cm

10 INSTALLATION OF INDOOR, OUTDOOR UNIT
ENGLISH
Fixing Installation Plate
The wall you select should be strong and solid
enough to prevent vibration
1Mount 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.
2Measure the wall and mark the centerline.
It is also important to use caution concern-
ing 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 1>
<Type 2>
Indoor Type Capacity
(kBtu/h) Type
Wall mounted 9, 12 1
18, 24 2
Type "A" Screws
Unit Outline
Place a level on raised tab
Unit Outline
34 70
L1
L2
L3
H2
H1
(L1~L3) (H1) (H2)

18 K / 24 K / 34 K capacity is based on 5 m length
7034
30
40
Additional charge (g) = [(L1 + L2 + L3 ) – (A x CF1)] x a – (CF2 x 150)
L1~L3 (m) : Installed Piping Length (Outdoor Unit ~ Indoor Unit)
A (m) : Charge-less piping length
a (g/m) : Additional charging volume for Main Pipe (Outdoor Unit ~ Indoor Unit)
CF1 : Total number of connected indoor unit ÷ Max. number of connectable indoor unit
CF2 : Max. number of connectable indoor unit – Total number of connected indoor unit
* Refer to the specifications for detail information of A, a.
* If total additional charge value after calculation comes out to be negative, then do not consider additional charge.
Drill a hole in the wall
Drill the piping hole with a Ø65mm hole core drill. Drill the piping hole at either the right or the
left with the hole slightly slanted to the outdoor side.
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor

FLARING WORK AND CONNECTION OF PIPING
12
Cut the pipes and the cable
- Use the piping kit accessory or the pipes pur-
chased 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 in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
Putting nut on
- Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring
work)
Flaring work
- Carry out flaring work using flaring tool as
shown below.
Firmly hold copper pipe in a bar in the
dimension shown in the table below.
Copper
tube 90° Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Outside diameter A
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
FLARING WORK AND CONNECTION OF PIPING

13
FLARING WORK AND CONNECTION OF PIPING
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
Connecting
pipe
Connecting cable
Tape
Drain hose
Connecting
pipe
Connecting cable
Tape
Drain hose
If the drain hose is routed inside the room, insulate the hose with an insulation material* so
that dripping from "sweating"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.
CAUTION
!
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.
Connection of piping - Indoor
Preparing the indoor unit's piping and drain hose for installation through the wall.
1Route the indoor tubing and the drain hose in the direction of rear left or right
2Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at
the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow
inside the unit.
Drain hose
Drain hose
ENGLISH

FLARING WORK AND CONNECTION OF PIPING
14
Indoor unit installation
Hook the indoor unit onto the upper portion of
the installation plate.(Engage the two hooks of
the rear top of the indoor unit with the upper
edge of the installation plate.) Ensure that the
hooks are properly seated on the installation
plate by moving it left and right.
Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).
Connecting the pipings to the indoor unit and
drain hose to drain pipe
- Align the center of the pipings and sufficient-
ly tighten the flare nut by hand.
- Tighten the flare nut with a wrench.
- When extending the drain hose at the indoor
unit, install the drain pipe.
Wrap the insulation material around the con-
necting portion.
- Overlap the connection pipe insulation mate-
rial and the indoor unit pipe insulation materi-
al. Bind them together with vinyl tape so that
there is no gap.
- Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Drain hose
Connecting
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Plastic bands Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide)
Wrap with vinyl tape
Indoor
unit pipe
Pipe
Outside diameter. Torque
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Ø19.05 3/4 110±10

15
FLARING WORK AND CONNECTION OF PIPING
ENGLISH
- Bundle the piping and drain hose together by
wrapping them with vinyl tape over the
range within which they fit into the rear pip-
ing housing section.
Good case
Press on the upper side of clamp and unfold
the tubing to downward slowly.
Bad case
Following bending type from left to right could
cause problem of pipe damage.
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Ø12.7(1/2 inch) Connector
Installation Information (For right piping) For right piping, follow the instruction below.
CAUTION
!
Connection of piping - Outdoor
Align the center of the piping and sufficiently
tighten the flare nut by hand.
Connecting pipe order
1) ROOM A~E gas side pipe
2) ROOM A~E liquid side pipe
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
- When tightening the flare nut with torque wrench
ensure the direction for tightening follows the arrow
on the wrench.
Gas side piping
ROOM A
ROOM B
ROOM C
Liquid
side piping
Outside diameter Torque
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Ø19.05 3/4 110±10
Outdoor unit
Main gas
side valve
Main liquid
side valve Gas side piping
ROOM A
ROOM B
ROOM C
ROOM D
ROOM E
Liquid
side piping
ENGLISH

34 K
24 K
18 K
16

If the supply cord is damaged, it must be replaced by a special cord or
assembly available from the manufacturer of its service agent.
ENGLISH
17

CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT
18
ENGLISH
1 Remove the cover control from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually as the following.
2 Secure the cable onto the control board
with the holder (clamper).
3 Refix the cover control to the original posi-
tion with the screw.
4 Use a recongnized circuit breaker between
the power source and the unit. A discon-
nection device to adequately disconnect all
supply lines must be fitted.
After the confirmation of the above conditions, prepare the wiring as follows.
1Never fail to have an individual power circuit specifically for the air conditioner. As for the
method of wiring, be guided by the circuit diagram posted on the inside of control cover.
2Firmly tighten the terminal screws to prevent them loosening. After tightening, pull the
wires lightly to confirm that they do not move. (If they are loose the unit, the unit will not
operate normally or it can cause burn-out of the wires.)
3Specification of power source.
4Confirm that electrical capacity is sufficient.
5See to that the starting voltage is maintained at more than 90 percent of the rated volt-
age marked on the name plate.
6Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7Do not install an earth leakage circuit breaker in a wet or moist area.
8The following would be caused by voltage drop.
- Vibration of a magnetic switch, which will damage the contact point, fuse breaking, dis-
turbance of the normal function of the overload.
9 The means for disconnection from a power supply shall be incorporated in the fixed wiring
and have an air gap contact separation of at least 3mm in each active(phase) conductors.
10 The Power cord connected to the unit should be selected according to the following
specifications.
CAUTION
!
Power cord
Connecting cable
Terminal block
Outdoor unit
Over 15mm
Holder for
power supply
cord
Terminal block
Loosen terminal screw
Capacity (kBtu/h) 18 24 34
Circuit Breaker (A) 20 20 25
1Ø Models
Connect the cable to the Outdoor unit

19
CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT
ENGLISH
Use round pressure terminals for connections to the power terminal block.
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power
wiring may cause abnormal heat.)
- When connecting wiring which is the same thickness, do as shown in the figure below.
- For wiring, use the designated power wire and connect firmly, then secure to prevent outside
pressure being exerted on the terminal block.
- Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small
head will strip the head and make proper tighterning impossible.
- Over-tightening the terminal screws may break them.
Round pressure terminal Power wire
Connect same thickness
wiring to both sides.
It is forbidden to connect
two to one side.
It is forbidden to
connect wiring of
different thicknesses.
Precautions when laying power wiring
ENGLISH

CHECKING THE DRAINAGE AND FORMING THE PIPINGS
20
Drain pan
Drain
hose
Leakage
checking
Connecting area
drain hose
Leakage
checking
Downward slope
Do not raise
Water
leakage
Accumulated
drain water
Air
Waving
Water
leakage
Tip of drain hose
dipped in water
Water
leakage Ditch
Less than
50mm gap
Checking the Drainage
To check the drainage.
1Pour a glass of water on the evaporator.
2Ensure the water flows through the drain
hose of the indoor unit without any leak-
age and goes out the drain exit.
Drain piping
1The drain hose should point downward for
easy drain flow.
2Do not make drain piping.
CHECKING THE DRAINAGE AND FORMING
THE PIPINGS