LG LB-H2460 Series, LB-E6080 Series, LB-E4880 Series, LB-G3680 Series, LB-G3660 Series Installation Instructions Manual

ENGLISH

CEILING DUCT TYPE AIR CONDITIONERS

INSTALLATION INSTRUCTIONS

(Refrigerant : R-407C)

P/No.: 3828A20342B

(Side)

(Rear)

Air intake

vents

Air outlet

vents

Control Cover
Connecting Wire

Connection Pipe
Drain Hose

Air filters

Remote Controller

Air intake vents

Air outlet vents

(Side)

(Rear)

Air intake vents

Air outlet vents

Piping
Drain hose

Connecting wire

Control cover

Indoor Unit

Outdoor Unit

ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

• This unit is charged with new refrigerant, R-407C.

• Be sure to use proper tools for R-407C, when installing the unit.

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

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

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

1. The following should be always observed for safety ..............................3

2. Installation of Indoor, Outdoor unit

3. Connecting Pipes to the Indoor Unit

4. Connecting Pipes to the Outdoor Unit

5. Checking the Drainage..............................................................................14

6. Connecting Cables between Indoor Unit and Outdoor Unit

7. Air Purging of the Connecting Pipes and the Indoor Unit ....................18

8. Group Control ............................................................................................19

9. Two Thermistor System ............................................................................19

10. Hight-Static Motor Connection(For 48K/60K Model)............................20

11. E.S.P (External Static Pressure) Setting................................................21

12. How to set E.S.P?. ...................................................................................22

OUT-LINE OF INSTALLATION

Installation works Installation Parts Required tools

1)

Selection of the best
location

............................4

2) Indoor unit installation....5

•

Four Type “A” screws

•

Connecting cable

•

Level

•

Screw driver

•

Electric drill

•

Hole core drill (ø70mm)

1) Preparation of Piping...12

•

Pipes: Gas side .....

1

/2", 5/8", 3/4"

Liquid side .............

1

/4", 3/8", 1/2"

•

Insulated drain hose

•

Insulation materials

•

Flaring Tools set

1) Connecting the pipes to

the Outdoor Unit..........14

•

Additional Drain hose

(Inner Dia...............25mm)

1) Connecting cables to the

Indoor Unit...................15

2) Clamping of cables......15

3) Connecting cables to the

Outdoor Unit ................16

4) Form the pipings..........17

•

Screw driver

•

Hexagonal Wrench (4mm/5mm)

•

Gas-leak Detector

2

ENGLISH

3

1. The following should be always observed for safety

• Please report to or take consent by the supply authority before connecting to the system.

• 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 owner's manual in an accessible
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 accor ding 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 could fall
causing injured.

• 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 f alling, 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.

• If the electrical part cover if the indoor unit and/or the service
panel if the outdoor unit are not attached securely, it could result
in a fire or electric shock due to dust, water , etc.

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

WARNING

WARNING

CAUTION

CAUTION

Do not install the electric heater

• Electric heater may cause deformation or fire of blower
and housing which were made of plastic.

1. Selection of the best location

1) Indoor unit

Select location

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 be leveled.

• 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

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.

3) Piping length and the elevation

4

Indoor unit

Outdoor unit

B

A

More than
30cm

More than
30cm

More than
70cm

Sunroof

Fence or

obstacles

More than
30cm

More than
30cm

More than
70cm

Sunroof

Fence or

obstacles

H

600600

Top view

(unit: mm)

Front view

Front

Inspection hole

(600X600)

Control box

1000

2. Installation of Indoor, Outdoor Unit

• If 18K Model is installed at a distance of 15m, 225g of
refrigerant should be added (15-7.5) x 30g = 225g

• Capacity is based on standard length and maximun allowance
length is on the basis of reliability.

• Improper refrigerant charge may result in abnormal cycle.

18K BTU/h
24K BTU/h
36K BTU/h
48K BTU/h
60K BTU/h

30
30
40
40
40

5/8"
5/8"
5/8"
3/4"
3/4"

7.5

7.5

7.5

7.5

7.5

50
50
50
50
50

5
5
5
5
5

30
30
30
30
30

1/4"
1/4"
1/4"
3/8"
1/2"

Capacity

Gas Liquid

Elevation B(m)

Length A(m)

*Additional

refrigerant

(g/m)

Pipe Size

(Diameter: Ø)

Standard StandardMax. Max.

ENGLISH

2. Indoor unit installation

■ Installation of Unit

Install the unit above the ceiling correctly.

• Apply a joint-canvas betw een 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.

5

CASE 1

POSITION OF SUSPENSION BOLT

CASE 2

POSITION OF CONSOLE BOLT

(Unit:mm)

Drainage hole

M10 Nut
M10 SP. washer
M10 washer

X 4
X 4

(Local
supply)

X 4

M10 Nut

M10 SP. washer

M10 washer

X 4
X 4

(Local
supply)

X 4

A
B

C

1-3 mm

D

(G)

H

I

EF

A B C D E F (G) H I

18K BTU/h

932 880 355 45.5 450 30 87 750 163

24K BTU/h

932 880 355 45.5 450 30 87 750 163

36K BTU/h

1232 1182 355 45.5 450 30 87 830 186

48K BTU/h

1292 1230 570.5 54 680 30 120 1006 294

60K BTU/h

1292 1230 570.5 54 680 30 120 1006 294

Dimension

Capacity

6

• 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

Tighten the nut and bolt to prevent
unit falling

CAUTION

• Local supply
Set anchor
Plate washer - M10
Spring washer - M10
Nut - W3/8 or M10
Suspension bolt - W3/8 or M10

ENGLISH

Ceiling

CAUTION

1~3mm

Drainage hole

Drainage hole

U-Trap

B

C

A ≥ 70mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure

(mmAq)

Ex) External Pressure

= 10mmAq
A ≥ 70mm
B ≥ 40mm
C ≥ 20mm

A

Make sure to be closed.

Unit

Drainage pipe
(Local supply)

Thermal insulator

(Local supply)

Drainage hole

CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING

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

7

Front of view

• 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.

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

Applied U-Trap Dimension

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 5mm.

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

installation.

CORRECT

CORRECT

INCORRECT

INCORRECT

• Upward routing not
allowed

8

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

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

INSULATION, OTHERS

Insulate the joint and tubes completely.

All thermal insulation must comply with local requirement.

INDOOR UNIT

REFRIGERANT PIPE

• Insulate and tape both the gas piping and
liquid piping.

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

• Air distribution Is the air circulation good?

• Drain Is the drainage smoothly and no sweating?

• Gas leakage Is the piping connection correctly?

• Wiring Is the wiring connection correctly?

• Lock-bolt Is the lock-bolt of compressor loosened?

THERMAL INSULATION

TEST AND CHECK

5~7mm

Indoor Outdoor

WALL

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

Liquid pipe

Thermal insulator

Gas pipe

Tape