LG A3UW21GFA2 installation manual

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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

Original instruction

www.lg.com

MFL67855426

Copyright © 2014 - 2019 LG Electronics Inc. All Rights Reserved.

Rev.01_042219

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2	IMPORTANT SAFETY INSTRUCTIONS

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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scrathes or skin peeled off or deteriorated then it must be replaced. There

• Do not modify or extend the power cable. If the power cable or cord has

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.

4	IMPORTANT SAFETY INSTRUCTIONS
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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
properly. A bad connection may cause water leakage.			<![if ! IE]> <![endif]>ENGLISH
• Install the drain hose to ensure that the condensed water is drained away

• 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.

6	IMPORTANT SAFETY INSTRUCTIONS
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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	7

TABLE OF CONTENTS

2IMPORTANT SAFETY INSTRUCTIONS

8INSTALLATION

9INSTALLATION OF INDOOR, OUTDOOR UNIT

9Select the best location

10Fixing Installation Plate

11Piping length and elevation

11Refrigerant charge

12Preparing work for Installation (ART COOL Type Only)

13Drill a hole in the wall

13 INSTALLATION OF WIRED REMOTE CONTROLLER

15Wired remote controller installation

16FLARING WORK AND CONNECTION OF PIPING

16Flaring work

17Connection of piping - Indoor

19Connection of piping - Outdoor

20CONNECTING 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

24Checking the Drainage

25Forming the Piping

26AIR PURGING AND EVACUATION

26Checking method

27Evacuation

28PANEL FRONT ASSEMBLY (ART COOL TYPE ONLY)

29INSTALLATION PI485

30TEST RUNNING

31FUNCTION

31DIP S/W Setting

32Forced Cooling Operation

33Wiring Error Check

33Saving Power Consumption

34Night Quiet Mode

35Mode Lock

35SLC (Smart Load Control) Mode

36PCB Display(14/16/18/21k Model Only)

37MAX COMBINATION CAPACITY

38INSTALLATION GUIDE AT THE SEASIDE

38 SEASONAL WIND AND CAUTIONS IN WINTER

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39 Model Designation

39 Airborne Noise Emission

39 Limiting concentration

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8 INSTALLATION

INSTALLATION

Installation Parts

Installation plate

Type "B" screws

Type "A" screw (6 EA)	Type "A" screw (8 EA)	Type "A" screw (7 EA)	Type "A" screw and plastic anchors
	Holder Remote Control

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.

s orles -11/16) 500(19

more or

3/8) - (39 0 0 0

1

	-13/16)
	300(11ore
	m
	or
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or	<![if ! IE]> <![endif]>omr
-11/16)
500(19	<![if ! IE]> <![endif]>o)8/
	<![if ! IE]> <![endif]>3-93(0 001
	<![if ! IE]> <![endif]>H
	-13/16)
	300(11or
	more
LD	-3/8)
1000(39
more
or

or300(11-
more13/16)				113/16)
600(
		23		-
				more
or		-		300(1or
			19/	32)
	more

300(11-13/16) or more

2 000(78-3/4) or more

600(23-19/32) or more

1 000(39-3/8) or more

η In case of series or another installation, please refer to related PDB.

INSTALLATION OF INDOOR, OUTDOOR UNIT	9

INSTALLATION OF INDOOR, OUTDOOR UNIT

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

Indoor unit

1 Do not have any heat or steam near the unit.

2Select a place where there are no obstacles in front of the unit.

3Make sure that condensation drainage can be conveniently routed away.

4 Do not install near a doorway.

5Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.

6Use a stud finder to locate studs to prevent 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)

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 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	More than 20 cm
than 50 cm
	More
More than 1.5	than 50 cm

Outdoor unit

1If 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.

2Ensure that the spaces indicated by arrows around front, back and side of the unit.

3Do not place animals and plants in the path of the warm air.

4Take the air conditioner weight into account and select a place where noise and vibration are minimum.

5Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.

6Place that can sufficiently endure the weight and vibration of the outdoor unit and where even installation is possible.

7Place that has no direct influence of snow or rain.

8Place with no danger of snowfall or icicle drop.

9Place 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.

		more than 60 cm
	more than	more than
	30 cm
		30 cm
	more than	more than
	70 cm	60 cm
		more than 60 cm
		more than
		30 cm
	more than
	30 cm
	more than
	70 cm
		more than
		60 cm

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10 INSTALLATION OF INDOOR, OUTDOOR UNIT

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.

	Indoor Type	Capacity	Type
		(kBtu/h)
	Wall mounted	5, 7, 9, 12, 15	1, 3
	/ART COOL
		18, 24	2, 4
	Mirror

<Type 1>

Installation plate
<Type 1>
105 mm	105 mm
Ø 65	Ø 65
65 mm	55 mm
Left rear piping	Right rear piping

2Measure 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>

		Installation plate
101 mm		101 mm
Ø 65	133 mm	Ø 65
		100 mm

<Type 2>	Left rear piping	Right rear piping

<Type 3>

Ø 65

<Type 3>

45 mm

140 mm

Left rear piping

Installation plate

45 mm

Ø 65 65mm

65 mm

Right rear piping

<Type 4>
	460	567
<Type 4>
Unit
Outline
Ø 65		Place a level on raised tab	Ø 65
Left Rear	184	Installation plate	Right Rear
Piping		156	Piping
220		(Unit : mm)	307

INSTALLATION OF INDOOR, OUTDOOR UNIT 11

Piping length and elevation

	Multiple Piping Models					(Unit: m)
	Phase	Capacity(kBtu/h)	Total Length	Max Length(A/B)	Max Elevation	In - In Elevation
					(h1)	(h2)
		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

A	!	CAUTION
	Capacity is based on standard length and
	maximum allowance length is on the
	basis of reliability. If outdoor unit is at
h2	higher elevation than the indoor units,
	after 24 m of vertical height, 1 oil trap is
h1	required.
B
Multiple Piping Type

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	Capacity	Standard	Max Piping for	Max total Piping	Chargeless	Additional
		(kBtu/h)	Length(m)	one room(m)	Length	Length	Charge(g/m)
		14/16	7.5	20	30	20	20
		18	7.5	25	50	22.5	20
	1Ø	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

•Multiple Piping Models

Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20 g/m

+(B Room Installation Length – Standard Length ) x 20 g/m +.. ) - CF(Correction Factor) x 150

ηCF = Max. number of connectable indoor unit – Total number of connected indoor unit

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12 INSTALLATION OF INDOOR, OUTDOOR UNIT

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.

2The 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.	Pipe hole
3	In case of connecting direction is left or right, path through
	the hole of cover side.

! CAUTION		! NOTE
After removing the pipe hole, cut the burr		When connecting pipe path through rear
for safety.		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.

Adhesive	Only one
	direction
Connecting
part
Drain	rubber cap
hose