LG LT-D4880CA Installation Manual

ENGLISH

CEILING CASSETTE TYPE AIR CONDITIONERS

INSTALLATION INSTRUCTIONS

• Please read this instruction sheet completely before installing the product.

• When the power cord is damaged, replacement work should be performed by authorized personnel only.

• Installation work should be performed in accordance with national wiring standards by authorized personnel only.

48K

Outdoor Unit

Indoor Unit

Cooling & Heating Model has included Drain Elbow

Anti-bacteria filter

Air Intake

Air Outlet

Air Intake

(side, rear)

Connecting Wire

Drain Hose

Power Wire

Connection Tube

Air Outlet

Vents

Air Outlet

Air Intake

(side, rear)

Connection Piping Drain hose

Connecting wire

Control cover

Air Outlet

Air Intake

(side, rear)

Connection Piping Drain hose

Connecting wire

Control cover

P/No. : 3828A20110M

1.The following should be always observed for safety

...............................

2.Installation of Indoor, Outdoor Unit

............................................................

3. Test running

..............................................................................................

4. Auxiliary operation

...................................................................................

OUT-LINE OF INSTALLATION

Installation Parts

Required Tools

Installation Works

•

Connecting cable

• Pipes: Gas side Liquid side

• Hanging Bolt

(W 3/8 or M10 length 650mm)

• Insulated drain hose

• Additional Drain hose

(Inner Dia.............32mm)

•

Level

•

Screw driver

•

Electric drill

•

Hole core drill (ø70mm)

• Flaring Tools set

• Torque Wrenches

• Hexagonal Wrench

(4mm, 5mm)

• Gas-leak detector

•

Owner’s Manual

•

Thermometer

1) Selection of the best location......................4

2) Ceiling opening dimensions and hanging

bolt location(unit: mm).................................5

3) The Indoor Unit Installation.........................6

4) Remote Controller Installation ....................6

5) Wiring Connection.......................................8

ELECTRICAL WIRING................................9

CONNECTING THE CABLE TO OUTDOOR UNIT

......9

6) Connecting Pipes to the Indoor Unit .........10

PIPING CONNECTION.............................11

7) Installation of Decorative Panel.................12

8) Indoor Unit Drain Piping............................13

HEAT INSULATION...................................14

FORM THE PIPINGS................................14

1) PRECAUTIONS IN TEST RUN.................15

CHECK THE FOLLOWING ITEMS WHEN

INSTALLATION IS COMPLETE................15

2) Connection of power supply......................16

3) Evaluation of the performance..................16

1) Two thermistor system..............................17

2) Ajusting to the height of ceiling .................18

3) Group control (optional wiring)..................19

4) Central control (optional)...........................20

1. The following should be always observed for safety

ENGLISH

• Be sure to read "THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY" before installing the air conditioner.

• Be sure to observe the cautions specified here as they include important items related to safety.

• The indications and meanings are as follows.

• After reading this manual, be sure to keep it together with the instruction manual in a handy place .

Could lead to death, serious injury, etc.

Do not install it yourself (customer).

Perform the installation securely referring to the installation manual.

Install the unit securely in a place which can bear the weight of the unit.

Perform electrical work according to the installation manual and be sure to use an exclusive circuit.

Attach the electrical part cover to the indoor unit and the service panel to the outdoor unit securely.

Be sure to use the part provided or specified parts for the installation work.

Check that the refrigerant gas do not leak after installation is completed.

Perform the drainage/piping work securely according to the installation manual.

Use the specified wires to connect the indoor and the outdoor units securely and attach the wires firmly to the terminal board connecting sections so the stress of the wires is not applied to the sections.

• Incomplete installation could cause injury due to fire, electric shock,

the unit falling or a leakage of water. Consult the dealer from whom you purchased the unit or special installer.

• Incomplete installation could cause a personal injury due to fire, electric shock, the unit falling or a leakage of water.

• When installed in an insufficient strong place, the unit may fall and result in serious problem.

• Incomplete connecting and fixing could cause fire.

• If the capacity of the power circuit is insufficient or there is

incomplete electrical work, it could result in a fire or an electric shock.

• The use of defective parts could cause an injur y or leakage of water due to a fire, electric shock, the unit falling, etc.

• If there is a defect in the drainage/piping work, water could drop from the unit and household goods could be wet and damaged.

Do not install the unit in a place where an inflammable gas leaks.

• If gas leaks and accumulates in the area surrounding the unit, it could cause an explosion.

• Not being attached securely, it may cause electric problem or electric shock due to dust or water etc.

Could lead to serious injury in particular environments when operated incorrectly.

WARNING

CAUTION

Perform grounding

• Do not connect the ground wire to a gas pipe, water pipe arrester or telephone ground wire. Defective grounding could cause an electric shock.

1. Selection of the best location

1) Indoor unit

• 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.

2) Outdoor unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.

• There should not be any animals or plants which could be affected by hot air discharged.

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

Unit:cm

Ceiling

Ceiling Board

30 or more

Above 250

400 or less

100

or more

50 or more

30 or less

Floor

More than 30cm

Indoor unit

Outdoor unit

2. Installation of Indoor, Outdoor Unit

• Rated performance for refrigerant line length of: 7.5m

• If 18K Model is installed at a distance of 15m, 187.5g of refrigerant

should be added ..................................................................(15-7.5)x25g

3) Piping length and the elevation

18K Btu/h

5/8" 1/4"7.5 50 5 30 25

K Btu/h

5/8" 1/4"7.5 50 5 30 30

36K Btu/h 1 phase

5/8" 1/4" 7.5 50 5 30 45

36K Btu/h 3 phase

5/8" 3/8" 7.5 50 5 30 60 48K Btu/h 3/4" 3/8" 7.5 50 5 30 60 54K Btu/h 3/4" 1/2" 7.5 50 5 30 70

CAP A CITY

GAS LIQUID

Rated Max. Rated Max.

Elevation

(m)

Length (m)

* Additional

refrigerant

(g/m)

Pipe Size

More than 30cm

Fence or

obstacles

Sunroof

More than

30cm

More than 50cm

More than 70cm

ENGLISH

• The dimensions of the paper model for installing

are the same as those of the ceiling opening dimensions.

•

Select and mark the position for fixing bolts and piping hole.

•

Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose

• Drill the hole for anchor bolt on the wall.

Unit:mm(18K/24K)

570 Unit size

450 (Hanging bolt)

7575

600 (Ceiling opening)

521(Hanging bolt)

39.5

Ceiling board

Level gauge

Ceiling

Use the ventilation fan for smoke-collecting hood with sufficient capacity.

Cooking table

Air conditioner

Take enough distance

• This air-conditioner uses a drain pump.

• Horizontly install the unit using a level gauge.

• During the installation, care should be taken not to

damage electric wires.

2. Ceiling opening dimensions and hanging bolt location

NOTE:

• Avoidthe following installatation location.

1. Such places as restaurants and kitchen where considerable amount of oil steam and flour is generated. These may cause heat exchange efficiency reduction, or water drops, drain pump mal-function. In these cases, take the following actions;

• Make sure that ventilation fan is enough to cover all noxious gases from this place.

• Ensure the enough distance from cooking room to install the air conditioner in such a place where it

may not suck oily steam.

2. Avoid installng air conditioner in such circumstances where cooking oil or iron powder is generated.

3. Avoid places where inflammable gas is generated.

4. Avoid place where noxious gas is generated.

5. Avoid places near high frequency generators.

CAUTION

3. The Indoor Unit Installation

• The following parts is option. Hanging Bolt - W 3/8 or M10 Nut - W 3/8 or M10 Spring Washer - M10 Plate Washer - M10

• Drill the piping hole on the wall slightly tilted to the outdoor side using a Ø 70 hole-core drill.

Wall

5~7mm

Indoor Outdoor

Set screw of paper model (4 pieces)

Paper model for installation

Ceiling board

150mm

Adjust the same height

Ceiling board

Ceiling

Flat washer for M10

(accessory)

Keep the length of the bolt

from the bracket to 40mm

Open the ceiling board along the outer edge of the paper model

Flat washer for M10

(accessory)

Hanging bolt

(W3/8 or M10)

Nut (W3/8 or M10)

Nut

(W3/8 or M10) Spring washer

(M10)

Air Conditioner body

• Tighten the nut and bolt to prevent unit falling.

4. Remote Controller Installation

• Although the room temperature sensor is in the indoor unit, the remote controller should be installed in such places away from direct sunlight and high humidity.

Installation of the remote controller

• Select places that are not splashed with water.

• Select control position after receiving customer approval.

• The room temperature sensor is built in the indoor unit.

• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult to

see.(The standard height is 1.2 ~ 1.5m high)

Routing of the remote controller cord

• Keep the remote controller cord away from the refrigerant piping and the drain piping.

• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power

cables (audio equipment, television set, etc.)

• If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water droplets

from running.

CAUTION

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