LG A5UW40GFA1 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.

MULTI

MFL67655701	www.lg.com
Rev.03_111320	Copyright © 2012 - 2020 LG Electronics Inc. All Rights Reserved.

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2	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:

•Do not cool excessively indoors. This 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 tightly 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.

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	3

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.

•Always install a dedicated circuit and breaker.

-Improper wiring or installation may cause fire or electric shock.

•Use the correctly rated breaker or fuse.

-There is risk of fire or electric shock.

•Do not modify or extend the power cable.

-If the power cable or cord has scratches 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.

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4 IMPORTANT SAFETY INSTRUCTIONS

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 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 before turning on the product.

-Do not use the telephone or turn switches on or off. There is risk of explosion or fire.

!CAUTION

Installation

•If anyone other than a licensed Professional installs, repairs, or alters LG Electronics Air Conditioning Products, the warranty is voided.

-All costs associated with repair are then the full responsibility of the owner.

•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.

•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.

•Contact the authorized service technician for repair or maintenance of this unit.

•Contact the installer for installation of this unit.

•When the power cord is to be replaced, replacement work shall be performed by authorized personnel only using only genuine replacement parts.

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

IMPORTANT SAFETY INSTRUCTIONS

5

• The user must carry out checks and cleaning of routine to avoid defective performance.	<![if ! IE]> <![endif]>ENGLISH
- In a special situation, only service personnel can carry out repair work.
• If the supply cord is damaged, it must be replaced by a special cord or assembly available from the
manufacturer of its service agent.
• 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.

•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 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.

•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 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.

•The user must carry out checks and cleaning of routine to avoid defective performance.

-In a special situation, only service personnel can carry out repair work.

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

•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.

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6	TABLE OF CONTENTS

TABLE OF CONTENTS

2TIPS FOR SAVING ENERGY

7INSTALLATION

8INSTALLATION OF INDOOR, OUTDOOR UNIT

8Select the best location

9Foundation for Installation

10Piping length and elevation

11Refrigerant charge

12FLARING WORK AND CONNECTION OF PIPING

12Flaring work

13Connection of piping - Indoor

15Connection of piping - Outdoor

18Installation

19Installation of The Main Unit

20CONNECTING THE CABLE BETWEEN INDOOR UNIT AND

OUTDOOR UNIT

20Connect the cable to the Indoor unit

21Connect the cable to the Outdoor unit

23Connection of Wiring

24CHECKING THE DRAINAGE AND FORMING THE PIPINGS

24Checking the Drainage

25Forming the Piping

26AIR PURGING AND EVACUATION

26Checking method

27Evacuation

28INSTALLATION PI485

29TEST RUNNING

30FUNCTION

30DIP S/W Setting

31Forced Cooling Operation

32Wiring Error Check

32Saving Power Consumption

33Night Quiet Mode

34Mode Lock

35MAX COMBINATION CAPACITY

36INSTALLATION GUIDE AT THE SEASIDE

37SEASONAL WIND AND CAUTIONS IN WINTER

INSTALLATION 7

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

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Installation Tools

Figure	Name	Figure	Name
	Screw driver		Multi-meter
	Electric drill		Hexagonal wrench
	Measuring tape, Knife		Ammeter
	Hole core drill		Gas-leak detector
	Spanner		Thermometer,
			Level
	Torque wrench		Flaring tool set

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8 INSTALLATION OF INDOOR, OUTDOOR UNIT

INSTALLATION OF INDOOR, OUTDOOR UNIT

Read completely, then follow step by step.

Select the best location

Indoor unit

1Do 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.

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.

! 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

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

INSTALLATION OF INDOOR, OUTDOOR UNIT	9

Foundation for Installation

•Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installation.

•Fix the unit securely by means of the foundation bolts. (Prepare 4 sets of M12 foundation bolts, nuts and washers each which are available on the market.)

•It is best to screw in the foundation bolts until their length are 20 mm from the foundation surface.

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Spring washer

Frame Nut

H-Beam

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Anti-vibration
materials									Four bolt are
Concrete
base									required
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[Unit:mm]

Foundation bolt executing method

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10 INSTALLATION OF INDOOR, OUTDOOR UNIT

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
	40/48				85	25			15				7.5
Distributor type Models													(Unit: m)
Phase	Capacity		Total		Max Main Pipe		Total Branch	Max Branch		Max Elevation			In - In
	(kBtu/h)		Length		Length (A/B)		Pipe Length	Pipe Length			(h1)		Elevation (h2)
	40		100		50		50		15		30		15
1Ø	48		135		55		80		15		30		15
	56		145		55		90		15		30		15
	42		125		55		70		15		30		15
3Ø	48		135		55		80		15		30		15
	56		145		55		90		15		30		15

A		A Distributor	Branch Pipe
		h2
		Distributor	h2
h1		h1
		Main Pipe
	B	B

Multiple Piping Type

Distributor 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.

INSTALLATION OF INDOOR, OUTDOOR UNIT 11

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(kBtu/h)	Standard	Max Piping for	Max total Piping	Additional
			Length(m)	one room(m)	Length	Charge(g/m)
		14/16	7.5	20	30	20
		18	7.5	25	50	20
	1Ø	21	7.5	25	50	20
		24/27	7.5	25	70	20
		30	7.5	25	75	20
		40/48	7.5	25	85	20
	Distributor type Models					(Unit: m)
			Main Piping length		Branch piping length
	Phase	Capacity(kBtu/h)	Standard	Additional	Standard	Additional
			length(m)	refrigerant(g/m)	length(m)	refrigerant(g/m)
		40	5	50	5	20
	1Ø	48	5	50	5	20
		56	5	50	5	20
		42	5	50	5	20
	3Ø	48	5	50	5	20
		56	5	50	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

•Distributor type Models

Additional charge (g) = (( Total Main piping Length - Main Standard Length ) x 50 g/m

+(A Room Branch Length – Standard Length ) x 20 g/m

+(B Room Branch Length – Standard Length ) x 20 g/m

+(C Room Branch Length – Standard Length ) x 20 g/m +.. )

-CF(Correction Factor) x 100

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

Ex) Distributor type Model 1Ø, 40 kBtu/h

A A

C

a

b

c

7k

9k

9k

B

d

e

9k

18k

•Total main pipe(A+B+C) = 30 m

•Each branch pipe a = 10 m

b = 8 m c = 5 m d = 3 m e = 10 m

*Additional Charge

=((30-5) x 50 + (10-5) x 20 + (8-5) x 20 + (5-5) x 20 + (3-5) x 20 + (10-5) x 20) - (7-5) x 100 = 1 270 g

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12 FLARING WORK AND CONNECTION OF PIPING

FLARING WORK AND CONNECTION OF PIPING

Flaring work

Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.

Cut the pipes and the cable

-Use the piping kit accessory or the pipes purchased locally.

-Measure the distance between the indoor and the outdoor unit.

-Cut the pipes a little longer than measured distance.

-Cut the cable 1.5 m 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.

	Pipe diameter	A inch (mm)
	Inch (mm)	Wing nut type	Clutch type
	Ø 1/4 (Ø 6.35)	0.04~0.05(1.1~1.3)
	Ø 3/8 (Ø 9.52)	0.06~0.07(1.5~1.7)	0~0.02
	Ø 1/2 (Ø 12.7)	0.06~0.07(1.6~1.8)
			(0~0.5)
	Ø 5/8 (Ø 15.88)	0.06~0.07(1.6~1.8)
	Ø 3/4 (Ø 19.05)	0.07~0.08(1.9~2.1)

Copper

tube

Bar

90°

Point down

Copper tube

"A"

Copper pipe

Slanted Uneven Rough

Pipe

Reamer

Flare nut

<Wing nut type>

<Clutch type>

Firmly hold copper pipe in a bar in the dimension shown in the table below.