LG L6UH728FA2 INSTALLATION MANUAL

www.lg.com

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.

P/NO : 3828A20567K

2 Multi Type Air Conditioner

Multi Type Air Conditioner Installation Manual

TABLE OF CONTENTS

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

❏ 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

Installation Requirements

Required Tools

Installation Parts Provided

Installation Manual 3

Installation Parts Provided

Outdoor Unit

Wall Mounted Type

more than

25cm

more than

25cm

more than

75cm

more than

25cm

Air Outlet

Control cover

Installation plate

Type "B" screws

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

Holder Remote Control

more than

25cm

more than

25cm

more than

75cm

more than

25cm

Air Outlet

Connection pipe Drain hose

Connecting wire

Control cover

4 Multi Type Air Conditioner

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

■ Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage.

Be sure not to do.

Be sure to follow the instruction.

Safety Precautions

WARNING

■ Installation

Install the panel and the cover of control box securely.

• 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

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

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 ground the product.

• There is risk of fire or electric shock.

WARNING

CAUTION

Installation Manual 5

Safety Precautions

Do not modify or extend the power cable.

• There is risk of fire or electric shock.

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.

For installation, 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.

• 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.

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 store or use flammable gas or combustibles near the product.

• There is risk of fire or failure of product.

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.

n Operation

6 Multi Type Air Conditioner

Safety Precautions

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

• Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is drained away properly.

• A bad connection may cause water leakage.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

• It may cause a problem for your neighbors.

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

• 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. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

CAUTION

■ Installation

Installation Manual 7

Installation of Indoor, Outdoor Unit

Read completely, then follow step by step.

1. Indoor unit

• 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.

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

Select the best location

600

Top view

(unit: mm)

Front view

Front

Inspection Hole

(600X600)

Inspection Hole

(600X600)

Control box

1000

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

CAUTION: Install the indoor unit on the wall where the height from the floors more than 2.3 meters.

Wall mounted Type

Ceiling Concealed Duct Type

8 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

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.

• 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 Cassette Type

Ceiling

Ceiling Board

500 or

more than

25 cm

more than

75 cm

more than

25cm

20 or more

1500

or more

Floor

Ceiling Board

500 or

Unit:mm

more than

25 cm

more than

25 cm

more than

25cm

more than

75cm

Installation of Indoor, Outdoor Unit

Installation Manual 9

Piping length and elevation table.

Piping length and elevation

60 A = 30 30 15 h1=30 10

50 B = 50 - - h2=30 10

30 B = 30 - - h2=30 10

110 A = 50 60 15 h1=45 10

50 B = 50 - - h2=45 10

45 A = 30 15 15 h1=30 10

50 B = 50 - - h2=30 10

60 A = 30 30 15 h1=30 10

50 A=50 - - h1=30 10

110 A=50 60 15 h1=45 10

50 B=50 - - h2=45 10

110 B=50 60 15 h2=45 10

Total Length

Max Main Pipe

Length (A/B)

Total Branch Pipe Length

Max Branch Pipe Length

Max Elevation

(h1/h2)

Indoor - Indoor

Elevation (h3)

Branch Pipe

Main Pipe

Distributor

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.

Model

With Distributor

L5UC7 28FA2

L5UC7 28FA3

L6UH7 28FA2

L8UC1

508FA1

L8UC10

08FA2

L8UH10

08FA2

L8UC10

08FA3

None Distributor

A-Circuit

None Distributor

A-Circuit

With Distributor

None Distributor

B-Circuit

None Distributor

B-Circuit

50 A = 50 - - h1=45 10

60 B = 30 30 15 h2=30 10

With Distributor

A-Circuit

With Distributor

B-Circuit

None Distributor

A-Circuit

10 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Flared connection (Union)

Flared connection (Service valve, Ball valve)

Use a seemliness tube

Factory charged

Indoor

Outdoor

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.

■

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.

24 kBtu/h 15.88 6.35 30g/m

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

24/30/36 kBtu/h

15.88 6.35 30g/m

48 kBtu/h 19.05 9.52 50g/m

Main Pipe

Branch Pipe

Additional

Refrigerant

Pipe

Gas Liquid

Refrigerant piping

Table. Distributor type

12/18 kBtu/h 12.7 6.35 20g/m

24/30/36 kBtu/h

15.88 6.35 30g/m

48 kBtu/h 19.05 9.52 50g/m

Branch Pipe

Additional

Refrigerant

Pipe

Gas Liquid

Table. Non Distributor type

Installation Manual 11

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.

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

Connecting pipe

Connecting cable

Tape

Drain hose

Connecting pipe

Connecting cable

Tape

Drain hose

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 of Indoor, Outdoor Unit

Indoor unit installation

Wall Mounted Type

12 Multi Type Air Conditioner

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.

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.

: Recommended Insulation material

Meterial: FOAM PE Thickness: 10mm Density: less than 0.032 ±0.005(g/cm

)

Thermal conductivity: less than 0.03

(kcal/m·h°C)

NOTICE

Drain hose

Connecting

cable

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

Outside diameter Torque

Indoor unit tubing Flare nut Pipings

Spanner (fixed)

Flare nut

Torque wrench

Indoor unit tubing

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Connection pipe

Vinyl tape (wide)

Plastic bands

Connecting cable

Vinyl tape(narrow)

Insulation material

Wrap with vinyl tape

Indoor unit pipe

Pipe

Installation Manual 13

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.

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)

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

Installation of Indoor, Outdoor Unit

14 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

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.

■ How to fix installation plate

• 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.

■ Drill a hole in the wall

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

Standard

Installation plate

Left rear piping Right rear piping

Ø70mm

133mm

Ø70mm

100mm

Chassis

Hook

Installation Plate

Type “A”

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

Indoor Type

Capacity

(kBtu/h)

Distance (mm)

Type

ABCD

Installation Plate

Chassis

Hook

Type “A”

Ø70mm

Left rear piping Right rear piping

Installation plate

Ø70mm

Installation of Indoor, Outdoor Unit

Installation Manual 15

Ceiling Concealed Duct Type

■ Installation of Unit

Install the unit above the ceiling correctly.

• Apply a joint-canvas between the unit and duct to absorb unnecessary vibration.

• Apply a filter Accessory at air return hole.

• Install the unit leaning to a drainage hole

side as a figure for easy water drainage.

• A place where the unit will be leveled and that can support the weight of the unit.

• A place where the unit can withstand its vibration.

• A place where service can be easily performed.

CASE 1

POSITION OF SUSPENSION BOLT

CASE 2

POSITION OF CONSOLE BOLT

(Unit:mm)

Drainage hole

1-3 mm

(G)

M10 SP. washer

M10 washer

M10 Nut

X 8

X 4

(Local supply)

X 4

M10 Nut

M10 SP. washer

M10 washer

X 4

(Local supply)

X 8

18 kBtu/h

932 880 355 45.5 450 30 87 750 163

24 kBtu/h 30 kBtu/h

1 232 1 180 355 45.5 450 30 87 830 186

36 kBtu/h 48 kBtu/h 1 292 1 230 477 56 590 30 120 1 006 294

Dimension

Capacity

A B C D E F (G) H I

16 Multi Type Air Conditioner

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.

1 Set anchor

Old building New building

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:Tighten the nut and bolt to prevent unit falling

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

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

CORRECT

INCORRECT

Drainage hole

Ceiling

1~3mm

Drainage hole

Installation of Indoor, Outdoor Unit

Installation Manual 17

• 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.

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

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

Applied U-Trap Dimension

CORRECT

INCORRECT

• Upward routing not allowed

Caution for gradient of unit and drain piping

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

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

Unit

Make sure to be closed.

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

Thermal insulator

(Local supply)

Drainage pipe (Local supply)

Drainage hole

U-Trap

Indoor Outdoor

WALL

5~7mm

18 Multi Type Air Conditioner

Installation of Indoor, Outdoor Unit

Insulate the joint and tubes completely.

All thermal insulation must comply with local requirement.

REFRIGERANT PIPE

• Insulate and tape the gas piping.

■ 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?

THERMAL INSULATION

TEST AND CHECK

Make sure that there is no clearance here.

Overlap with thermal insulator for piping.

Thermal insulator for refrigerant pipe (Local supply)

Thermal insulator for piping(Local supply)

Hose clip for thermal insulator(Local supply)

Union for liquid pipe

Refrigerant pipe and thermal insulator(Local supply)

Union for gas pipe

Thermal insulator for refrigerant pipe (Local supply)

Hose clip for thermal insulator (Local supply)

Power cable

Thermal insulator

Gas pipe

Liquid pipe

Tape

Insulation, others

+ 42 hidden pages