LG MU4M25 INSTALLATION INSTRUCTIONS

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.

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This product contains Fluorinated Greenhouse Gases. (R410A)

TYPE : MULTI

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Original instruction

www.lg.com

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P/NO : MFL67855417

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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.

•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 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.

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4	IMPORTANT SAFETY INSTRUCTIONS
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• 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.

•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.

•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.

IMPORTANT SAFETY INSTRUCTIONS	5

• Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant lev-	<![if ! IE]> <![endif]>ENGLISH
els 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 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 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.

•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.

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6	TABLE OF CONTENTS

TABLE OF CONTENTS

	2	TIPS FOR SAVING	31		CHECKING THE
		ENERGY			DRAINAGE AND FORM-
	3	IMPORTANT SAFETY			ING THE PIPINGS
		INSTRUCTIONS	31		Checking the Drainage
			32		Forming the Piping
	7	INSTALLATION
				33 AIR PURGING AND
	8	INSTALLATION OF
					EVACUATION
		INDOOR, OUTDOOR	33		Checking method
		UNIT	34		Evacuation
			35		PANEL FRONT
	8	Select the best location
	9	Fixing Installation Plate			ASSEMBLY
	10	Piping length and elevation
					(ART COOL TYPE ONLY)
	11	Refrigerant charge
	12	Preparing work for Installation (ART		36	INSTALLATION PI485
		COOL Type Only)
	13	Sticking the installation guide map and		37	TEST RUNNING
		fixing Indoor unit (ART COOL Type Only)
	14		38		FUNCTION
		Drill a hole in the wall
	15
		INSTALLATION OF	38		Dip S/W Setting
			39		Forced Cooling Operation
		WIRED REMOTE
			40		Wiring Error Check
		CONTROLLER	40		Saving Power Consumption
			41		Night Quiet Mode
	17	Wired remote controller installation
			42		Mode Lock
	18	FLARING WORK AND	43		PCB Display(14/16/18/21k Model Only)
			44		MAX COMBINATION
		CONNECTION OF PIPING
					CAPACITY
	18	Flaring work
			45		INSTALLATION GUIDE AT
	19	Connection of piping - Indoor
	21	Connection of piping - Outdoor			THE SEASIDE
	24	Installation
	25	Installation of The Main Unit	45		SEASONAL WIND AND
	26 CONNECTING THE CABLE
					CAUTIONS IN WINTER
		BETWEEN INDOOR UNIT	46		Model Designation
		AND OUTDOOR UNIT	46		Airborne Noise Emission
			46		Limiting concentration
	26	Connect the cable to the Indoor unit
	28	Connect the cable to the Outdoor unit
	30	Connection of Wiring

INSTALLATION

Installation Parts

Installation plate

INSTALLATION 7

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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

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.

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 1.5m)

More than
10cm	More than 20cm

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

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	More than 20cm
than 50cm

More

than 50cm

More than 1.

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

more than 70cm

more than 60cm

INSTALLATION OF INDOOR, OUTDOOR UNIT	9

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.

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

<Type 1>

<Type 1>	Installation plate
	105mm	105mm
Chassis	Ø65	Ø65
Hook	65mm	55mm
	Left rear piping	Right rear piping

Type “A”

<Type 2>

2Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation platerouting 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

Chassis

Hook

Installation plate

101mm	101mm
Ø65	Ø65
133mm	100mm
Left rear piping	Right rear piping

<Type 3>

Type “A”	Ø65
<Type 3>	45mm		Installation plate		45mm
Installation Plate			Ø65
	140mm			65mm
				65mm
	Left rear piping		Right rear piping
	<Type 4>
Type “A”		460		567
<Type 4>	Unit
	Outline
Installation Plate	Ø65		Place a level on raised tab		Ø65
	Left Rear	184	Installation plate	156	Right Rear
	Piping		(Unit : mm)		Piping
	220				307

Type "A" Screws

Chassis

Hook

65mm

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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				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 24m 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	7.5	25	85	20
	Distributor type Models					(Unit: m)
			Main Piping length		Branch piping length
	Phase	Capacity(kBtu/h)	Standard	Additional refrig-	Standard	Additional refrig-
			length(m)	erant(g/m)	length(m)	erant(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 20g/m

+(B Room Installation Length – Standard Length ) x 20g/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 50g/m

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

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

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

-CF(Correction Factor) x 100

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

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

A A

C

a

b

c

7k

9k

9k

B

d

e

9k

18k

•Total main pipe(A+B+C) = 30m

•Each branch pipe a = 10m

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

*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 = 1270g

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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

INSTALLATION OF INDOOR, OUTDOOR UNIT 13

Sticking the installation guide map and fixing Indoor unit (ART COOL Type Only)

Put an Installation Guide Map on the desired surface.

INSTALLATION GUIDE MAP

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Make a hole with diameter of 6mm and depth of 30-35mm when piercing a screw point.

INSTAIIATION

GUIDE M

AP

Drive the four plastic anchors into drilled points.

I
NS
TALL
A
TI
ON	GUI
	DEM
	AP

Plastic anchors

Hang the hole of product at the upper screws. (In this time, Remove the map)

(Falling attention)

Hanger hole (Rear side of

product)

INSTALLATION GUIDE MAP

Check the fixed product with light power.

Adjust level even by level guage and fix to installation for reference on the wall.

Horizontality

I
N
ST
ALL
A
TI
ONG
UI
DE	MAP

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14 INSTALLATION OF INDOOR, OUTDOOR UNIT

Drill the piercing part for connecting pipe as diameter Ø65mm. (In case of piercing rear surface)

Refer to No. 5 on this page when making a hole in the wall.

First, Drive the two points of the upper parts by screws.(Leave 10mm for hanging product)

10mm	INSTALLATION
		GU

Drive the lower parts after facing the hole of product with plastic anchors, and fix completely the upper screws.

Plastic anchors

In case of nothing wrong in the matter, connect the pipe and the wire. (Installation manual reference)

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.

	WALL
Indoor	Outdoor
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INSTALLATION OF WIRED REMOTE CONTROLLER 15

INSTALLATION OF WIRED

REMOTE CONTROLLER

1Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup.

-Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box.

2Can set up Wired remote controller cable into three directions.

-Setup direction: the surface of wall reclamation, upper, right

-If setting up remote controller cable into upper and right side, please set up after removing remote controller cable guide groove.

2

2

η Remove guide groove with long nose.

		3
Reclamation to the surface of the wall	1	3

Upper part guide groove
Right part guide groove	<Wire guide grooves>

3Please fix remote controller upper part into the setup board attached to the surface of the wall, as the picture below, and then, connect with setup board by pressing lower part.

-Please connect not to make a gap at the remote controller and setup board’s upper and lower, right and left part.

<Connecting order>

Wall				Wall
Side				Side

When separating remote controller from setup	<Separating order>
board, as the picture below, after inserting into
the lower separating hole using screw driver and
then, spinning clockwise, remote controller is	Wall	Wall
separated.	Side	Side
- There are two separating holes. Please individu-
ally separate one at a time.
- Please be careful not to damage the inside
components when separating.

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