LG LWB5EW1DF1, LWA5EW1DF1, LWA5ER2DF1, LWA5HW2DF1, LWA6ER1D Owner’s Manual

Please read this manual carefully before operating the unit.

Room Air Conditioner Owner’s Manual

TABLE OF CONTENTS

Safety precautions

Safety Precautions ..................................................3

Operating instructions

Caution while operating Air Conditioner ..................4

About the Controls on the Air Conditioner ...............8

Care and Maintenance ..........................................13

Installation Instructions

Installation Instructions............................................14

Troubleshooting tips

Before You Call for Service.....................................16

10 Easy steps to find AC Tonnage ........................17

FOR YOUR RECORDS

Write the model and serial numbers here:

Model #

Serial #

You can find them on a label on the side of each unit.

Dealer's Name

Date Purchased

n Staple your receipt to this page in the event you need

it to prove date of purchase or for warranty issues.

READ THIS MANUAL

Inside you will find many helpful hints on how to use
and maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call
for service at all.

PRECAUTION

• Contact the authorized service technician for repair or
maintenance of this unit.

• Please install your air-conditioner by company
authorised service franchisee / authorised service
and sales dealer.

• The air conditioner is not intended for use by young

children or invalids without supervision.

• Young children should be supervised to ensure that

they do not play with the air conditioner.

• When the power cord is to be replaced, replacement

work shall be performed by authorized personnel only,
using only genuine replacement parts.

-2-

We recommend usage of voltage stabilizer with
high / low voltage cut off in areas having voltage
fluctuations.

AC TONNAGE STABILIZER KVA

(3-STEP STABILIZER)

1.0

1.5

2.0

3
4
5

Safety Precautions

To prevent injury to the user or other people and proper ty damage, the following instructions
must be followed.
n Incorrect operation due to ignoring instruction will cause har m or damage. The seriousness

is classified by the following indications.

WARNING

CAUTION

n 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 injur y or damage to properties only.

Be sure not to do.

Be sure to follow the instruction.

WARNING

n Installation

Don’t use a power cord, a
plug or a loose socket which
is damaged.

Otherwise, it may cause a fire

•
or electrical shock.

Always plug into a grounded
outlet.

• Otherwise, it may cause a fire
or electrical shock.

Do not modify or extend the
power cord length.

• It will cause electric shock or fire
due to heat generation.

Do not disassemble or
modify products.

• It may cause failure and

electric shock.

Be caution when unpacking
and installing.

• Sharp edges may cause
injury.

-3-

Do not use the power cord near
flammable gas or combustibles
such as gasoline, benzene,
thinner, etc.

• It may cause explosion or fire.

CAUTION WHILE OPERATING AC

n Operation

Do not place heavy object
on the power cord and take
care so that the cord should
not be pressed.

• There is danger of fire or electr ic
shock.

Do not share the outlet with
other appliances.

• It will cause electric shock or fire
due to heat generation.

Take the power plug out if
necessary, holding the head
of the plug and do not touc h
it with wet hands.

• Otherwise, it may cause a fire
or electrical shock.

Do not place the power cord
near a heater.

• It may cause fire and electr ic
shock.

Unplug the unit if strange
sounds, odors, or smoke
come from it.

• Otherwise it may cause fire and
electric shock accident.

Ventilate the room well when
using this appliance
together with a stove, etc.

• An oxygen shortage may occur.

Do not allow water to run
into electric parts.

• It will cause failure of machine or
electric shock.

Do not open the suction
inlet grill of the product
during operation.

• Otherwise, it may electrical
shock and failure.

Turn off the power and
breaker firstly when
cleansing the unit.

• Since the fan rotates at high
speed during operation, it may
cause injury.

Use a soft cloth to clean. Do
not use wax, thinner, or a
strong detergent.

• The appearance of the air
conditioner may deteriorate,
change color, or develop surface
flaws.

If water enters the product, turn
off the the power switch of the
main body of appliance. Contact
service center after taking the
power-plug out from the socket.

Turn off the main power
switch when not using it for
a long time.

• Prevent accidental startup and
the possibility of injury.

-4-

Do not operate or stop the
unit by inserting or pulling
out the power plug.

Do not damage or use an
unspecified power cord.

Do not operate with wet
hands or in damp
environment.

• It will cause electric shock or fire
due to heat generation.

Hold the plug by the head
when taking it out.

• It may cause electric shock and
damage.

• It will cause electric shock or fire.

When gas leaks, open the
window for ventilation
before operating the unit.

• Otherwise, it may cause
explosion, and a fire.

CAUTION

• It will cause electric shock.

Never touch the metal parts
of the unit when removing
the filter.

• They are sharp and may cause
injury.

n Installation

Install the product so that the noise or hot
wind from the outdoor unit may not cause
any damage to the neighbors.

• Otherwise, it may cause dispute with the

neighbors.

Keep level parallel in installing the product.

• Otherwise, it may cause vibration or water
leakage.

-5-

n Operation

Do not put a pet or house
plant where it will be
exposed to direct air flow.

• It may cause injury.

Do not step on the
indoor/outdoor unit and do
not put anything on it.

• It may cause an injury through
dropping of the unit or falling
down.

Do not block the inlet or
outlet of air flow.

• It may cause product failure.

Always insert the filter
securely.
Clean it every two weeks.

• Operation without filters will
cause failure.

Use a soft cloth to clean. Do
not use wax, thinner, or a
strong detergent.

• The appearance of the air
conditioner may deteriorate,
change color, or develop surface
flaws.

Do not drink water drained
from air conditioner.

• It contains containments and will
make you sick.

Be cautious not to touch the
sharp edges when
installing.

• It may cause injury.

Avoid excessive cooling and
perform ventilation
sometimes.

• Otherwise, it may do harm to
your health.

-6-

Do not insert the hands or
bars through the air inlet or
outlet during operation.

• Otherwise, it may cause
personal injury.

Before Operation

Preparing for Operation

1. Contact an installation specialist f or installation.

2. Plug in the power plug properly.

3. Use a dedicated circuit.

4. Do not use an e xtension cord.

5. Do not star t/stop operation by plugging/unplugging the power cord.

6. If the cord/plug is damaged, replace it with only an author ized replacement
part.

Usage

1. Being exposed to direct airflow for an extended period of time could be
hazardous to your health. Do not expose occupants, pets, or plants to direct
airflow for extended periods of time.

2. Due to the possibility of o xygen deficiency, ventilate the room when used
together with stoves or other heating devices.

3. Do not use this air conditioner f or non-specified special purposes (e.g.
preserving precision devices, food, pets, plants, and ar t objects). Such usage
could damage the items.

Cleaning and Maintenance

1. Do not touch the metal par ts of the unit when removing the filter. Injuries can
occur when handling sharp metal edges.

2. Do not use water to clean inside the air conditioner . Exposure to water can
destroy the insulation, leading to possible electric shock.

3. When cleaning the unit, first mak e sure that the power and breaker are turned
off. The fan rotates at a very high speed dur ing operation. There is a
possibility of injury if the unitÕs power is accidentally triggered on while
cleaning inner parts of the unit.

Service

For repair and maintenance, contact your authorized service dealer.

-7-

About the Controls on the air conditioner

TEMPERATURE OPERATION

Cool Coolest

AUTO SWING

Off On

Wait for 3 minutes before restart

Med
Fan

Low
Fan

Low
Cool

Off

High
Cool

Med
Cool

Cooling Model (Fig.1)

OFF: Stop all operation.
FAN: Circ ula tes filte red air.
LOW COOL: Switc hes on the compressor and air

cooling opera tion at low fan speed.
MEDIUM COOL: Switches on the Compressor and
air coolin g operation at medium fa n speed.

If you move the switch from a cool setting to

NOTE:

minutes before switching back to a cool

COOLING DESCRIPTIONS

For Nor mal Cooling- Sel ect High Coo l

or Med Coo l with the OPERATI ON knob
at the mi dpoint of THERMOST AT/
TEMPER ATURE knob (as mentioned in
fig.1 & fig.2)
For Maxi mum Cool ing- Sel ect High
Cool wi th the OPERATION kn ob at

Th er mo stat

5

4

3

2

1

Co ol Co ole st

Auto Swing

6

Off

7

8

9

Wait for 3 minutes before restart

Operation

Off

Med

On

Fan

Low
Fan

Low
Cool

Cooling Model (Fig.2)

HIGH COOL: Switc hes on the compressor

and air cooling operatio n at high fa n speed.
LOW FAN: Circulates filte red at low
speed.
MED FAN: Circulates filte red air at
medium speed.

off or to a fan setting, wait at least 3

setting.

the highest number available on
Thermostat/temperarure
knob(position 6~9 in fig.2)
For Quieter & Nighttime Cooling
Select Low Cool with the
OPERATION knob at the midpoint of
Thermostat / Temperature

(position 1~4 in fig.2)

knob

High
Cool

Med
Cool

your

THERMOSTAT (TEMPERATURE)

The THERMOSTAT/TEMPERATURE is used to maintain the room temperature. The
compressor will cycle on and off to keep the room at the same level of comfort.
When you turn the knob to a higher number (the right side) and the indoor air will
become cooler. The temperature is selected by turning the
Thermostat/temperature knob to the desired position.
The 5 or 6 position (the middle position of arc) is a normal setting for average
conditions.

-8-

Your Panel m ay l ook like a ny
of below mentioned panels.

2 3

Mode Timer

Fan

Type 1

Cool On

Dry Energy Saver

FAN

SPEED

Fan Speed Temp

4

Fan

Cool

Type 2

V

22

V

V

AUTO

SWING

5

Timer

6

22

V

Temp Power

5

ON/OFF

REMOTE CONTROLLER

7

1

5

3

7

( )

2 b

POWER

DOWN UP

FAN SPEED

TIMER COOLING/FAN

ENERGY SAVER AUTO SWING

REMOTE CONTROLLER

1

5

4

2

6

3

( )

2 b

POWER

DOWN UP

FAN SPEED

TIMER COOLING/FAN

ENERGY SAVER AUTO SWING

1

4

2

6

1

Type 3

Type 4

COOL

DRY

FAN

ENERGY SAVER ON

Mode Timer

(e)

EN ER GY SAV ER

COOL

FAN

FAN

SPEED

7

88

AUTO

SWING

4273 6 1

88

TEMP

ON/OFF

TEMP

ON/OFF

5

Temp

9

5

Temp

P

o

w

e

r

1
5

V

V

F

a

n

S

pe

e

d

4

S

l

e

e

p

T

i

m r

e

2

M

o

d

e

63

A

u

t

o

S in

w

g

A

i

r

P

u

r

i e

f

i

r

P e

o

w

8

9

r

1

5

5

V

V

F p

a

n

S

e

e

d

4

S

l p

e

e

T

i

m

e

r

2

M

o

d

e

63

A

u

t

o

S

w

i

n

g

AUTO SWING

1

Controls

Precaution:

POWER BUTTON

1

Operation starts, when this button is pressed and stops when you press the button again.

OPERATION MODE SELECTION BUTTON

2

Select (a)Cool (b)Energy Saver (c)Fan & (d)Dehumidification (dry) with this button.
Energy saver mode-fan stops when compressor stops cooling. Approximately after 3
minutes fan will turn on to determine it cooling is needed. In dry mode, unit will run at
low fan speed only with compressor ‘ON’.

The Remote Control unit will not function properly if strong light strikes the sensor
window of the air conditioner or if there are obstacles between the Remote Control
unit and the air conditioner.

TEMP

FAN SPEED

MODE

POWER

1

4

2

6

-9-

ON/OFF TIMER

3

Set the time of on/off operation. The timer can be set by the one hour for a maximum of 12 hours.
In the first 30 minutes set tempe rature inc reases by 1°C and in the next 30 minutes temperature
increases by another 1°C, this temperature then remains till the timer function is deactivated .

FAN SPEED SELECTOR

4

Select the fan speed in Three steps Low (F1) / Med. (F2) / High (F3)

ROOM TEMPERATURE SETTING BUTTON

5

Control the room temperature within a range of 16°C to 30°C.

AUTO SWING

6

The ver tical louver swings horizontally by the automatic system and stops when you press the
button again.

7

SIGNAL RECEIVER

AIR PURIFIER (For Plasma Model)

8

Used to start or stop plasma purification system. Clean filter indication will be 'ON' on panel,
when filter cleaning is required.

SLEEP BUTTON

9

Sleep function can be set by one hour for a maximum of 7 hours. In the first 30 minutes set
temperature increases by 1°C and in the next 30 minutes temperature increases by another
1°C, this temperature then remains till the timer function is deactivated. This is how the
sleep function behaves. The fan speed will change to low speed(F1).

Operation modes may vary in select models.

Fan speed in two steps Low (F1) / High (F2) in select models.

AUTO RESTART

In failure of electric power the unit runs as pre vious setting operat ion when power ret ur ns.

NOTE: ‘SLEEP’ and ‘TIMER’ function cannot operate at same time.

How to Insert the Batteries

Remove the cover from the back of the remote

1

controller.

Slide the cover according to the arrow direction.

Insert the two batteries.

2

Be sure that the (+) and (-) directions are correct.
Be sure that both batteries are new.

Re-attach the cover.

3

Slide it back into the position.

Do not use rechargeable
batteries, such batteries differ
from standard dry cells in shape,
dimensions, and performance.

Remove the batteries from the
remote controller if the air
conditioner is not going to be
used for an extended length of
time.

-10-

REMOTE CONTROLLER

Mode

Type 2

27°C

24°C

21°C

18°C

Temp

2

3

Auto

Swing

ON/OFF

1

3

4

POWER

TEMP

FAN SPEED

MODE

AUTO SWING

Turbo

Silent

High
Fan

Low
Fan

Mode

Type 1

(e)

Saver

Comfort

Cool

Super
Cool

Temp

2

3

Auto

Swing

1

HIGH COOL

LOW COOL

HIGH FAN

4

LOW FAN

Controls

Precaution:

POWER BUTTON

1

Operation starts, when this button is pressed and stops when you press the button again.

MODE

2

Select (a) Turbo (b) Silent (c) High Fan & (d) Low Fan with this button.

(a) Turbo / High Cool : Switches on compressor and air cooling operation at high fan speed.
(b) Silent / Low Cool : Switches on compressor and air cooling operation at low fan speed.
(c) High Fan : Circulates filtered air at high speed.
(d) Low Fan : Circulates filtered air at low speed.

It is recommended to select 'Silent / Low Cool' for Normal Cooling Operation and select
'Turbo / High Cool' for maximum cooling requirement.

TEMP

3

Controls Room temp. from 18°C to 27°C with step of 3°C.

a) Super Cool / 18°C : 18°C Temperature Setting.
b) Cool / 21°C : 21°C Temperature Setting.
c) Comfort / 24°C : 24°C Temperature Setting.
d) (e) Saver / 27°C : 27°C Temperature Setting.

The Remote Control unit will not function proper ly if st rong light strikes the sensor
window of the air conditioner or if there are obstacles between the Remote Control
unit and the air condition er.

1

5

2

4

AUTO SWING

4

The ver tical louver swings horizontally by the automatic system and stops when

you press the button again.

FAN SPEED

5

Select fan speed in two steps - High/Low.

-11-

Additional controls and important information.

Vent Control

The vent control is located above the
control knobs.

When set at CLOSE, only the air inside
the room will be circulated and
conditioned. When set at OPEN, some
inside air is exhausted outside.

To open the vent, pull the lever toward you.

To close it, push it in.

Air Direction

The direction of air can be controlled
horizontally or vertically by using the
horizontal louver or vertical louver.

CLOSE VENT OPEN

Horizontal Air-Direction

The horizontal air direction is adjusted
by setting the AUTO SWING switch to

Vertical Air-Direction

Fingertip pressure on the bank of horizontal
louvers adjusts the air direction up or down

the ON position.

Parts Information

Learning parts name prior to installation will help you understanding the installation procedure.

CABINET

1.
FRONT GRILLE

2.
AIR FILTER

3.
AIR INTAKE(INLET GRILLE)

4.
AIR DISCHARGE

5.

2 31 4 5

VERTICAL AIR DEFLECTOR

6.
(HORIZONTAL LOUVER)

EVAPORATOR

7.
HORIZONTAL AIR

8.
DEFLECTOR
(VERTICAL LOUVER)

6

-12-

15

789

CONTROL BOARD

9.
POWER CORD

10.
COMPRESSOR

11.
BASE PAN

12.
BRACE

13.
CONDENSER

14.
PLASMA FILTER ASSY.

15.

10

11 121314

Care and Maintenance

Grille and Case

Turn the air conditioner off and remove the plug
from the wall outlet before cleaning.

Air Filter

Ensure the power is off before open the front Grill.
The air filter behind the front grille should be checked and cleaned
at least once every 2 weeks or more often if necessary.
The grille is designed to clean the filter downward.

To remove:

Open the inlet grille upward by pulling out the bottom of the

1

inlet grille. (Refer Fig. 1)

Using the tab, pull up slightly on the filter to release it and pull

2

it down (Fig. 1). Slide out five filter from grill (fig. 2).

Clean the filter with warm, soapy water below 40°C (104°/F).

3

Rinse and gently shake the water from the filter and let it dry

4

before replacing it.

CAUTION:

Drainage

DO NOT operate the air conditioner without a filter
because dirt and lint will clog it and reduce
performance.

To clean, use water and a mild detergent. Do not
use bleach or abrasives.

(Fig. 1)

(Fig. 2)

In humid weather, excess water may cause the BASE PAN to overflow.

1

To drain the water, remove the DRAIN CAP

To remove the condensed water, you can install the drain pan as below.

2

1.

2.

3.

Important

Take the drain pan which is located in the air discharge.
Install the drain pan to the right corner of the cabinet with 4 screws.
Connect the drain hose to the outlet located at the bottom of the drain

pan. You can purchase the drain hose or tubing locally to satisfy your
particular needs. (Drain hose is not supplied).

BASE
PAN

DRAIN CAP

CABINET

DRAIN

PAN

SCREW

DRAIN HOSE

(Optional)

DRAIN
CAP

BASE
PAN

Long-off period maintenance

1)If the air conditioner is not going to be used for a long period, run the Air-conditioner with the
setting in FAN Mode only and the fan speed on "HIGH" for about half an hour, to dry the whole
Air-conditioner.

2)After a long off period when you are going to use the air conditioner again, repeat above point
no. 1.

Caution

There will possibly be foul smell wh en the machine is started after a long time (1 wee k). This is due
to var ious odours em itted by smoke, foodstuff, cosmetics and others, which syicks to the Air Filter
and Evaporator coil. Hence, clean the Air Filter and the Evap orator before you start the machine
after long time to avoid foul smell.

-13-

Installation Instructions

Select the Best Location

To prevent vibration and noise, make sure the unit is installed securely and firmly.

A

Install the unit where the sunlight does not shine directly on the unit.

B

There should be no obstacle, such as a fence or wall, within 50cm from the back of the cabinet because it will prevent

C

heat radiation of the condenser.
Restriction of outside air will greatly reduce the cooling efficiency of the air conditioner.

Install the unit a little obliquely outward not to leak the condensed water into the room (about 10 ~ 15mm or 1/4

D

bubble with level).

CAUTION:

All side louvers of the cabinet must remain exposed to the outside of the structure.

Room AC

Outdoor

Wall

About 45mm

Top View

200 mm

Wall

Room AC

8~10mm

About 400~500mm
Wall

Front View

Unit Width 'A'

Side View

Ceiling

Over 100 mm

Indoor

10mm

Over 1200 mm

Floor

Height

Horizontal
Line

-5 ~ +5mm

Over 110 mm

Position A

Side View

Wooden frame 45~50mm

15mm

Unit

'B'

25mm

Remove the Air Conditioner From the Case

Remove the 2 shipping screws from the

A

back of the case.
Remove the 2 screws on each side of the

B

case. Keep these for later use.

Shipping screws

Wall

Over 1000 mm

Over

Slide the air conditioner from the case by

C

gripping the base pan handle and pulling
forward while bracing the case.

Over

200 mm

AC Top

Indoor

Window Width "A"

CATEGORY
12000 Btu/h
18000 Btu/h
22000 Btu/h

Wall

A
600
660
660

Window

Height

"B"

B
380
428
428

-14-

Installation Instructions

Install the Air Conditioner in the Case

Slide the air conditioner into the case.

A

Reinstall the screws removed earlier on
each side of the case.

Power Cord

Screw

CAUTION:

The power cord must be connected to
an independent circuit.
The green wire must be grounded.

Stuff the foam between the unit and the

B

wall to prevent air and insects from getting
into the room.

Fix Holder lock with base pan & cabinet

C

with screw to prevent machine from
sliding out of cabinet from back grill side
(Anti theft locking)

Screw

The Foam

At tac h th e front gr ille to the ca s e by

E

inserting the tabs on the grille into the slots
on the front of the case. Push the grille in
until it snaps into place.

Deo-filter*

When you detach the
front grille from the
case, push the grille
to your rightside and
pull it toward you.

Lift the Inlet grill and secure the front grill

F

with a screw Lower the inlet grill into place.
The maximum lift angle should not be more
than 75°

Before installing the front grille, pull out the

D

vent control lever located above the unit
control knobs, as shown.

-15-

Max opening angle 75 degree**

* Deo-filter available in select Models.

Remove Deodorizing filter carefully from the grill, shake
clean it by hand & keep it in sunlight for one hour to
activate it again; once it is choked.

** Grill lifting features available in
selected models

To fix the grill with cabinet, screw it

G

from both sides

Before you call for service...

Normal Operation

You may hear the thermostat click when the compressor cycles on and off.
Water will collect in the base pan during high numidity or on rainy days. The water may overflow

and drip from the outdoor side of the unit.
The fan may run even when the compressor does not.
Hissing Noise- Sound of liquid refrigerant passing througe the system.

Abnormal Operation

Problem

Air conditioner
does not start

Air conditioner
does not cool as it
should

Air conditioner
freezing up

AC Operation
is Noisy

Unit does not
Cool upon
restart

Possible Causes

The air conditioner is
unplugged.

The fuse is blown/circuit
breaker is tripped.

Power failure.

Airflow is restricted.

THERMOSTAT control set
too warm.

The air filter is dirty.

The room may have been
hot.

Cold air is escaping.

Cooling coils have iced up.

Ice blocks the air flow and
stops the air conditioner
from cooling the room.

Glass pane vibrating.

May be sound of
condensate water.

Installation levelling not
not proper.

Compressor not starting
due to 3 minute delay
internally.

What To Do

Make sure the air conditioner plug is pushed
completely into the outlet.

Check the house fuse/circuit breaker box and
replace the fuse or reset the breaker.

If power failure occurs, turn the OPERATION control
to OFF( O ) . When power is restored, wait 3 minutes
to restart the air conditioner to prevent tripping of the
compressor overload.

Make sure there are no curtains, blinds, or furniture
blocking the front of the air conditioner.

Turn the THERMOSTAT knob clockwise to a cooler
setting.

Clean the filter at least every 2 weeks.
See the operating instructions section.

When the air conditioner is first turned on you need
to allow time for the room to cool down.

Check for open furnace floor registers and cold air
returns.
Set the air conditioner's vent to the closed position.

See Air Conditioner Freezing Up below.

Set the OPERATION control at fan or HIGH cool with the
THERMOSTAT at the warmer position or the temperature
at more than 23°C.

Glass are to be penned
It is normal (Generally highing only)

(To avoid the noise, remove draing side knob & insert drain pipe
for proper drainge)

Get it levelled properly.

This is normal.
If you restart the air conditioner within 3 minutes after turning it
off a protective device will work to shut it off for 3 minutes.

-16-

10 Easy Steps to find out your AC tonnage

Dear Customer,
Please follow Below mentioned 10 easy steps to find out the AC tonnage required for your room.

Step

1

2

3

4

5

Parameter

Room Volume (Cubic feet)

upto 1000
1001 ~ 2000
2001 ~ 3000
3001 ~ 4000

Window Area exposed to sun
(in sq. ft.) - (West facing)

upto 10
11 ~ 20
21 ~ 30

Window Area exposed to sun
(in sq. ft.) - (other directions)

upto 10
11 ~ 20
21 ~ 35
36 ~ 50
Wall Area exposed to sun
(in sq. ft.) - (West facing)
100
150
200
300
Wall Area exposed to sun
(in sq. ft.) - (other directions)
100
150
300
500

Score

2
3
4
5

1
2
3

0
1
2
3

1
2
3
4

0
1
2
3

Walls area - not exposed to
sun (in sq. ft.)

100

6

300
600
1000

No. of persons occupying
room
2

7

4
6
8

Ceiling area exposed to sun
(in sq. ft.)

8

200
300
400
Ceiling area if not exposed to
sun (in sq. ft.)

9

200
300
400

Total Appliance Load (tube
light-40w / Computer­75w, CTV - 75 etc.)

10

100W
250W
500W

Parameter

ScoreStep

0
1
2
3

1
2
3
4

1
2
3

0
1
2

2
3
4

Score

6~10
11~17
18~25

AC recommended

1.0Tr

1.5Tr

2.0Tr

Score Table

Example : For Room size 15 feet(L) x 12 feet(B) x 10 feet(H) with one window 4 feet x 3 feet exposed to
sun (west) & one wall exposed to sun (east).The room is on First floor with ceiling not exposed to sun.
The no. of persons occupying the room is 4 nos. The appliance load is – 2 tube lights, 1 Computer & 1 TV.
Calculate the AC tonnage required.
As per steps given above : room volume : 15*12*10 = 1800 cu. Ft. , window area = 4*3=12 sq.ft.,
Wall area (east) = 15*10=150

Step1 = 3 Step6 = 2
Step2 = 2 Step7 = 2
Step3 = 0 Step8 = 0
Step4 = 0 Step9 = 1
Step5 = 1 Step10= 3

Total score = 14

-17-

1.5T Window AC

(From Score table)

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LG Electronics

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modify or alter design without any prior notice.

Global No.1 source : Japan Air Conditioning, Heating and Refrigeration News (JARN), December 2005.