LG L6UH728FA2 INSTALLATION 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.

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P/NO : 3828A20567K

Multi Type Air Conditioner Installation Manual

TABLE OF CONTENTS

Installation Requirements
Installation Parts Provided ........................................	3
Safety Precautions......................................................	4
Installation of Indoor, Outdoor Unit...........................	7
Wall mounted Type................................................	11
Ceiling Concealed Duct Type................................	15
Ceiling Cassette Type ...........................................	21
Flaring work and connection of piping...................	31
Connecting the Cable between Indoor Unit and
Outdoor Unit ..............................................................	44
Checking the Drainage, Forming the Pipings
and Long pipe Setting ..............................................	46
Air Purging and Evacuation .....................................	48
Test running...............................................................	50
Optional Operation - Ceiling Concealed Duct Type..........	51
Optional Operation - Ceiling Cassette Type ...........	55
Combination indoor units ........................................	58
Installation guide at the seaside..............................	59

Required Tools

Level gauge

Screw driver

Electric drill

Hole core drill (ø70mm)

Horizontal meter

Flaring tool set

Specified torque wrenches 1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m (different depending on model No.)

Spanner .................Half union

A glass of water

Screw driver

Hexagonal wrench(4mm)

Gas-leak detector

Vacuum pump

Gauge manifold

Owner's manual

Thermometer

Holder Remote Control

2 Multi Type Air Conditioner

Installation Parts Provided

Installation Parts Provided

Wall Mounted Type

Installation plate

Type "B" screws

Type "A" screw (6 EA)	Type "A" screw (8 EA)

Holder Remote Control

Outdoor Unit

Air Outlet

			Air Outlet
		more than	more than
		25cm	25cm
	more than
	25cm	more than	Control cover
		25cm	Connecting wire
	more than		Connection pipe
			Drain hose
	75cm	more than
	Control cover	75cm

Installation Manual 3

Safety Precautions

Safety Precautions

To prevent injury to the user or	damage, the following instructions
must be followed.
■ Incorrect operation due to	or damage. The seriousness
is classified by the following
WARNING This	death or serious injury.
CAUTION This	injury or damage.
■ Meanings of symbols used in

to do.

instruction.

WARNING

■ Installation

Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

•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. There is risk of fire or electric shock.

Always install a dedicated circuit and breaker.

•Improper wiring or installation may cause fire or electric shock

Always ground the product.

•There is risk of fire or electric shock.

Use the correctly rated breaker or fuse.

•There is risk of fire or electric shock.

4 Multi Type Air Conditioner

Safety Precautions

Do not modify or extend the power cable.

• There is risk of fire or electric shock.

For installation, always contact the dealer or an Authorized Service Center.

Be cautious when unpacking and installing the product.

•Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.

Do not install the product on a defective installation stand.

•There is risk of fire, electric shock, explosion, or injury.

•It may cause injury, accident, or damage to the product.

Be sure the installation area does not deteriorate with age.

•If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.

•There is the risk of death, injury, fire or explosion.

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.

ν Operation

Do not store or use flammable gas or combustibles near the product.

• There is risk of fire or failure of product.

Installation Manual 5

CAUTION

■ Installation

Always check for gas (refrigerant) installation or repair of product.

hose to ensure that water is properly.

Keep level even when installing

Don't let people to lift and transport product. (Use fork lift)

• Avoid personal injury.

may cause water leakage.

the product where the noise or hot air unit could damage the

.

a problem for your neighbors.

the product where it will be sea wind (salt spray) directly.

corrosion on the product. particularly on the condenser and fins, could cause product

or inefficient operation.

6 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Installation of Indoor, Outdoor Unit

Read completely, then follow step by step.

Selectthebestlocation

1. Indoor unit

Wall mounted Type

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

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

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

•Do not install near a doorway.

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

•Use 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.

More than
10cm	20cm
	More than
More	10cm
More than
10cm	20cm
	More than
	10cm
More

Ceiling Concealed Duct Type

Install the air conditioner in the location that satisfies the following conditions.

•The place shall easily bear a load exceeding four times the indoor unit’s weight.

•The place shall be able to inspect the unit as the figure.

•The place where the unit shall beleveled.

•The place shall allow easy water drainage.(Suitable dimension “H” is necessary to get a slope to drain as figure.)

•The place shall easily connect with the outdoor unit.

•The place where the unit is not affected by an electrical noise.

•The place where air circulation in the room will be good .

•There should not be any heat source or steam near the unit

	Top view	Inspection Hole
	(unit: mm)
		(600X600)
		Control box

<![if ! IE]> <![endif]>1000	600
Front
Front view
	H	600
Inspection Hole
(600X600)

Installation Manual 7

Installation of Indoor, Outdoor Unit

Ceiling Cassette Type

•There should not be any heat source or steam near the unit.

•There should not be any obstacles to prevent the air circulation.

•A place where air circulation in the room will be good.

•A place where drainage can be easily obtained.

•A place where noise prevention is taken into consideration.

•Do not install the unit near the door way.

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

•The indoor unit must keep the maintenance space.

Ceiling			20 or more
Ceiling Board			Ceiling Board
500 or	<![if ! IE]> <![endif]>1500	<![if ! IE]> <![endif]>or more	500 or
more			more
			H
			Unit:mm
			Floor

2. 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.

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 25 cm

more than 25 cm

more than 25 cm

more than 75 cm

more than 25cm

more than 25cm

more than 75cm

8 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Piping lengthand elevation

Piping length and elevation table.

		Model		Total Length	Max Main Pipe	Total Branch	Max Branch	Max Elevation	Indoor - Indoor
					Length (A/B)	Pipe Length	Pipe Length	(h1/h2)	Elevation (h3)
		With Distributor		60	A = 30	30	15	h1=30	10
	L5UC7
		None Distributor		50	B = 50	-	-	h2=30	10
	28FA2	A-Circuit
		None Distributor		30	B = 30	-	-	h2=30	10
		B-Circuit
		With Distributor		110	A = 50	60	15	h1=45	10
	L5UC7
		None Distributor		50	B = 50	-	-	h2=45	10
	28FA3	A-Circuit
		None Distributor		50	A = 50	-	-	h1=45	10
		B-Circuit
		With Distributor		60	B = 30	30	15	h2=30	10
	L6UH7	A-Circuit
		With Distributor		45	A = 30	15	15	h1=30	10
	28FA2
		B-Circuit
		None Distributor		50	B = 50	-	-	h2=30	10
		A-Circuit
	L8UC10	With Distributor		60	A = 30	30	15	h1=30	10
	08FA2
	L8UH10	None Distributor		50	A=50	-	-	h1=30	10
	08FA2
	L8UC10	With Distributor		110	A=50	60	15	h1=45	10
	08FA3	None Distributor		50	B=50	-	-	h2=45	10
	L8UC1	With Distributor		110	B=50	60	15	h2=45	10
	508FA1

CAUTION: Capacity is based

on standard length and maximum allowance length is on the basis of reliability.

When outdoor unit is at higher elevation than the indoor units, after 24m of vertical height, 1 oil trap is required.

	Distributor	Branch Pipe
	A
		h3
	B
	h1
		h2
	Main Pipe

Installation Manual 9

Installation of Indoor, Outdoor Unit

Refrigerantpiping

Perform the work according to the Service Manual or Installation Guide.

•Use two spanners when connecting the refrigerant pipe to the unit.

•Make a bend with a radius as large as possible.

•Perform air purge with R22 or vacuum drying.

•When piping work is finished, check all joints.

Indoor

Flared connection (Union)

Use a seemliness tube

Factory charged

■ Add refrigerant if piping over 7.5m as shown below, non distributor type.

■Add refrigerant if piping over 5m (main pipe), 7.5m (branch pipe) as shown below, distributor type.

Outdoor

Flared connection (Service valve, Ball valve)

Table. Distributor type

			Pipe		Additional
		Gas		Liquid	Refrigerant
	24 kBtu/h	15.88		6.35	30g/m
Main Pipe
	48/60 kBtu/h	19.05		9.52	50g/m
	90 kBtu/h	25.4		12.7	120g/m
	12/18 kBtu/h	12.7		6.35	20g/m
Branch Pipe
	24/30/36 kBtu/h	15.88		6.35	30g/m
	48 kBtu/h	19.05		9.52	50g/m

Table. Non Distributor type

			Pipe		Additional
		Gas		Liquid	Refrigerant
	12/18 kBtu/h	12.7		6.35	20g/m
Branch Pipe
	24/30/36 kBtu/h	15.88		6.35	30g/m
	48 kBtu/h	19.05		9.52	50g/m

10 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Indoorunitinstallation

Wall Mounted Type

1. Route the indoor tubing and the drain hose in the direction of rear left or right

Tape

Connecting pipe

Drain hose

Connecting cable

2.Tape 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.

Tape

Connecting pipe

Drain hose

Connecting cable

CAUTION: 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.

Installation Manual 11

Vinyl tape (wide)

Connection pipe

Installation of Indoor, Outdoor Unit

■Indoor unit installation on installation plate

1.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 in door unit and drain hose to drain pipe

1.Align the center of the pipings and sufficiently tighten the flare nut by hand.

2.Tighten the flare nut with a wrench.

Outside diameter		Torque
mm	inch	kgf.cm
Ø6.35	1/4	180~250
Ø9.52	3.8	340~420
Ø12.7	1/2	550~560
Ø15.88	5/8	630~820
Ø19.05	3/4	990~1 210

3.When extending the drain hose at the indoor unit, install the drain pipe.

Wrap the insulation material around the connecting portion.

1.Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap.

2.Wrap the area which accommodates the rear piping housing section with vinyl tape.

NOTICE : Recommended Insulation material Meterial: FOAM PE

Thickness: 10mm

Density: less than 0.032 ±0.005(g/cm3) Thermal conductivity: less than 0.03

(kcal/m·h°C)

Connecting

cable

Drain hose

Indoor unit tubing					Flare nut Pipings

Spanner (fixed)

Flare nut

Torque wrench

Connection pipe

Indoor unit tubing

Drain pipe

Indoor unit drain hose

Adhesive Vinyl tape(narrow)

Plastic bands	Insulation material

Indoor

unit pipe

Wrap with vinyl tape

Connecting cable

Pipe

Vinyl tape(narrow)

12 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

3.Bundle the piping and drain hose together by wrapping them with vinyl tape over the range within which they fit into the rear piping housing section.

Wrap with vinyl tape

Pipe

Vinyl tape(wide) Drain hose

CAUTION: Installation Information (For right piping) For right piping, follow the instruction below.

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.

Installation Manual 13

Installation of Indoor, Outdoor Unit

■ How to fix 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.

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.

Installation Plate

Chassis

Hook

<Type 1>

Type “A”

Installation Plate

Chassis

Hook

<Type 2>		Type “A”
D		Installation plate	B
Ø70mm	C	<Type 1>	A	Ø70mm
	Left rear piping		Right rear piping

		Installation plate
Ø70mm	133mm	<Type 2>	100mm	Ø70mm
	Left rear piping		Right rear piping

	Indoor Type	Capacity		Distance (mm)			Type
		(kBtu/h)	A	B	C	D
	Wall mounted	12	55	105	65	105	1
		18,24	100	122	240	122	2
	ART COOL Mirror	12	70	110	90	110	1
		18,24	100	122	240	122	2

■Drill a hole in the wall

•Drill the piping hole with a ø70mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

Standard

	WALL
Indoor	Outdoor

		<![if ! IE]> <![endif]>5-7mm	<![if ! IE]> <![endif]>(3/16"~5/16")

14 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Ceiling Concealed Duct Type

■ Installation of Unit

Install the unit above the ceiling correctly.

CASE 1

POSITION OF SUSPENSION BOLT

-canvas between the unit and unnecessary vibration.

Accessory at air return hole. (Unit:mm)

Dimension
A	B	C	D	E	F	(G)	H	I
Capacity
18 kBtu/h	880	355	45.5	450	30	87	750	163
932
24 kBtu/h
30 kBtu/h		355	45.5	450	30	87	830	186
1 232 1 180
36 kBtu/h
48 kBtu/h 1 292 1 230		477	56	590	30	120	1 006	294

CASE 2

unit leaning to a drainage hole figure for easy water drainage.

POSITION OF CONSOLE BOLT

where the unit will be leveled and support the weight of the unit. where the unit can withstand its

where service can be easily

A
B
	<![if ! IE]> <![endif]>C E
	<![if ! IE]> <![endif]>D
(G)	<![if ! IE]> <![endif]>F
<![if ! IE]> <![endif]>I	<![if ! IE]> <![endif]>mm
H	<![if ! IE]> <![endif]>1-3
Drainage hole

M10 Nut	X 8
M10 SP. washer X 4		(Local
M10 washer	X 4	supply)
M10 washer	X 4
M10 SP. washer X 4		(Local
		supply)
M10 Nut	X 8

Installation Manual 15

Installation of Indoor, Outdoor Unit

•Select and mark the position for fixing bolts.

•Drill the hole for set anchor on the face of ceiling.

•Insert the set anchor and washer onto the suspension bolts for locking the suspension bolts on the ceiling.

•Mount the suspension bolts to the set anchor firmly.

•Secure the installation plates onto the suspension bolts (adjust level roughly) using nuts, washers and spring washers.

CAUTION: Tighten the nut and bolt to prevent unit falling

Old building		New building
1	Set anchor
2	Plate washer
3	Spring washer
4	Nut
5 Suspension
	bolts
• Local supply
Set anchor
Plate washer		- M10
Spring washer		- M10
Nut		- W3/8 or M10
Suspension bolt		- W3/8 or M10

CAUTION:

1.Install declination of the indoor unit is very important for the drain of the duct type air conditioner.

2.Minimum thickness of the insulation for the connecting pipe shall be 10mm.

Front of view

	Ceiling
	<![if ! IE]> <![endif]>1~3mm
CORRECT	INCORRECT
Drainage hole	Drainage hole

• The unit must be horizontal or declined to the drain hose connected when finished installation.

16 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Cautionforgradientofunitanddrainpiping

Lay the drain hose with a downward inclination so water will drain out.

•Always lay the drain with downward inclination (1/50 to 1/100).

Prevent any upward flow or reverse flow in any part.

•5mm or thicker formed thermal insulator shall always be provided for the drain pipe.

	Thermal insulator
	(Local supply)
	Drainage pipe
Unit	(Local supply)
Make sure to be closed.	Drainage hole

•Upward routing not allowed

CORRECT

•Install the P-Trap (or U-Trap) to prevent a water leakage caused by the blocking of intake air filter.

INCORRECT
A ≥ 70mm
B ≥ 2C
C ≥ 2 x SP		B
SP = External Pressure
(mmAq)		C
Ex) External Pressure		U-Trap
= 10mmAq
A	≥ 70mm	A
B	≥ 40mm
C	≥ 20mm

•Drill the piping hole with 70mm dia, hole core drill.

•Piping hole should be slightly slant to the outdoor side.

Applied U-Trap Dimension

Indoor	WALL	Outdoor

5~7mm

Installation Manual 17

Thermal insulator for piping(Local supply)

Installation of Indoor, Outdoor Unit

Insulation,others

Insulate the joint and tubes completely.

THERMAL INSULATION All thermal insulation must comply with local requirement.

Union for liquid pipe

Refrigerant pipe and thermal insulator(Local supply)

Hose clip for thermal insulator (Local supply)

Thermal insulator for refrigerant pipe (Local supply)

Union for gas pipe

Thermal insulator for refrigerant pipe (Local supply)

Overlap with thermal

insulator for piping.

Hose clip for thermal insulator(Local supply)

Make sure that there is no clearance here.

REFRIGERANT PIPE
• Insulate and tape the gas piping.	Power cable	Tape
	Liquid pipe	Gas pipe
	Thermal insulator

TEST AND CHECK

■ After all workings are finished, check the working and operation.

• Air distribution						Is the air circulation good?
• Drain						Is the drainage smooth and no sweating?
• Gas leakage						Is the piping connection correct?
• Wiring						Is the wiring connection correct?
• Lock-bolt						Is the lock-bolt of compressor loosened?

18 Multi Type Air Conditioner