P/NO : MFL69286801
INSTALLATION MANUAL
SINGLE DUCTED SPLIT
AIR
CONDITIONER
www.lg.com
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.
ENGLISH
TIPS FOR SAVING ENERGY
2
ENGLISH
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
• Do not cool excessively indoors. This may be harmful for your health and may consume
more electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air con-
ditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may
block the air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
3
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
WARNING
It can result in serious injury or death when the directions are ignored
CAUTION
It can result in minor injury or product damage when the directions are ignored
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
•
The product shall be installed according to the wiring regulations of the corresponding country.
• The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment mal-
function, property damage, personal injury and/or death.
Installation
• Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box
cover are removed or opened.
- it may cause fire, electric shock, explosion or death.
• 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.
• 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 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 con-
denser 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 win-
dow is left open.
- Moisture may condense and wet or damage furniture.
• 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.
Operation
• Do not store or use flammable gas or combustibles near the product.
- There is risk of fire or failure of product.
CAUTION
Installation
• 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.
• Use two or more people to lift and transport the product.
- 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.
!
IMPORTANT SAFETY INSTRUCTIONS
4
ENGLISH
5
2 TIPS FOR SAVING EN-
ERGY
3 IMPORTANT SAFETY IN-
STRUCTIONS
6 INSTALLATION OF UNIT
6 Indoor Units Installation
6 Outdoor Unit Installation
9 Connection Drainage
10 Refrigeration Piping Connections
12 Guideline for Long Piping System
13 Additional Refrigerant Charge
14 Long Line Sizing
16 Oil Addition
16 Oil separator addition
17 Unit Controller Operation
18 Maintenance
19 Trouble Shooting
20 Electrical Wiring
21 INSTALLATION GUIDE
AT THE SEASIDE
TABLE OF CONTENTS
TABLE OF CONTENTS
ENGLISH
6
INSTALLATION OF UNIT
ENGLISH
Indoor Units Installation
The distance between the side and the sidewall cannot be less than 1 meter. In horizontal instal-
lation, ceiling hooks should be prepared for lifting the unit; in vertical installation, fix the unit on
the floor with bolts. Apply rubber cushions between the frame and its support to reduce vibra-
tion. The unit should be installed level, and the drain pan should be kept lean, The indoor unit
causes noise while operation, so it should be installed in a place where noise does not bother
people very much, in a room close to stairway, elevator or toilet, for example. A good way to
abate noise is to build a wall to isolate the machine from air-conditioned rooms, and close all
doors and windows of the unit room.
Therefore, the unit room should apply a return air system. To fix the return air piping, angle pipes
should be prepared on site. Besides, you ought to prevent noise for entering air-conditioned
rooms through the return air entrance.
Outdoor Unit Installation
The units can be installed on a proper ground or roof. The unit should be installed level with
enough air volume. In order to let air ow enter the condensation coil freely and without hot return
air, you should have sufficient space reserved when install the outdoor unit, as below table and
gure shows. Otherwise, air ow to the coil will get restrained, or discharge air will return. Conse-
quently there will be a capacity loss, power consumption will increase, and malfunction may
occur. Tall buildings around the unit may create downdraft affecting air discharge. Outdoor fan is
na axial flow fan, which does not an air pipe. Avoid installing the outdoor unit right below window
or between constructions, otherwise, noise caused by unit operation will go indoors. If the unit
can be easily approached by persons without permission, measures should be taken to protect it,
for example, setting up a fence. This will prevent the unit from sabotage or accidental damage,
and protect the control box from being opened and electrical components being exposed. Always
leave enough space between several outdoor units to benet their normal operation and your
maintenance.
Adjust the fin heat exchanger of the outdoor unit away from direct sunshine. Do not install the
unit in places full of dead leaves, insects or contaminations in case the heat exchanger is clogged
up. Ensure that the unit is set up level; the fan and compressor can operate normally, never in-
stall the unit in places easy to catch fire and exploded; be sure that no poisonous and dangerous
substance, such as oil steam or sulfur, exists in surrounding atmosphere keep the unit away from
boiler flue or any environment that can cause gin coil and other copper components to corrode. If
install the unit in places easy to be contaminated, you have to do more maintenance work.
The unit can be fixed on any flat surface that can hold 400 kg / m
2
pressure, no special pedestal
needed. Whether on roof or ground, rubber cushions should be applied between the unit frame
and its support to reduce vibration.
INSTALLATION OF UNIT
INSTALLATION OF UNIT
7
ENGLISH
MAINTENANCE
• Air Filter
According to specific environment conditions, the air filter is often fixed at a return air entrance,
to effectivel y screen soot, dust, dirt, farina and other matters. The air filter is usually made of
nylon or leno fiber, and can be washed with water. When cleaning it, lay it on a solid place and
knock it lightly to remove dusts from its surface. If necessary, wash it with neutral detergent in
warm water, and dry it before fix it back.
The air filter can be fixed and removed conveniently , for it can be taken out from all sides of a
unit.
• Belt
The indoor unit is driven by belt(s). After the unit works for some time, adjust the belt tension.
• Heat exchanger
Use a vacuum cleaner and a nylon brush to clean up the heat exchanger. If there is a com-
pressed air source available, blow off the dust from the exchanger surface with compressed
air. You should note that with a proper air ltering net and suf cient maintenance, there is no
need to wash the indoor exchanger’s surface.
However, the outside heat exchanger should be washed and cleaned regularly.
• Drainage Pipe
Before start the units,check if the drainage pipes are clogged, and ensure that the condensate
water can smoothly
• Components Replacement
You can get parts and accessories from the nearest representative of The following items
should be noted when you want some new components.
1) Unit model;
2) Unit series number;
3) Accessory name and required amount.
MAX. ELEV ATION HEIGHT
30m
INDOOR
UNIT
MAXIMUM PIPING
50m
Maximum Allowable Piping Length & Elevation Difference
8
INSTALLATION OF UNIT
ENGLISH
• Fan Installation and Adjustment
The fan rotating rate is subject to the air volume required by the units, the unit components and
the resistance in return air pipe. Based on the demanded air volume and the total static pres-
sure, according to the performance curve, you can make out the fan-rotating rate. With the ro-
tating rates of fans and motors, you will know to use what kind of belt pulleys.The fan-rotating
rate can be adjusted by changing belts or pulleys. This will change the indoor unit’s air volume
and residual pressure. To replace belts and pulleys on site, please see the following picture and
nd their correct positions.
• Belt Adjustment
If the belt is not tight enough, the friction between belt and pulleys may become weak and can
hardly drive the fan to rotate. As a result, the air volume and residual pressure will become in-
sufficient, and unit performance will be affected seriously. However, if the belt is too tight, the
fan or the motor bearings will be worn out more quickly, and the fan or the motor will have
lower performance and shorter operating life. Too loose or too tight belts are harmful to the
units and will make the noise louder. Readjust the belt tension after a week of trial operation.
And then, check the belt every 1 or 2 months to ensure that the tension is suitable. Otherwise,
make some adjustment or replace the belt. When use a new belt, in the first 24 hours of opera-
tion, check its tension at least twice.
• Safety
The installation and maintenance of the air conditioning system should be performed by well-
trained professionals. Regular maintenance, such as coil and air filter cleaning, is necessary for
a normal operation of the units.
Four key ways
Use ruler on site
AB CD
INSTALLATION OF UNIT
9
ENGLISH
Connection Drainage
Condensate drainage is provided on the unit. The connection is located at the rear. Use a 19 mm
diameter plastic tube.
To ensure correct condensate drainage,the drain line must be installed with a gradient of at least
2 % (2cm per metre) and without any upward slopes.
An elbow trap at least 50mm in in height must also be provided.
If possible, install a U bend fitted with an inspection cap.
Where the condensate lines from several units are joined together, each individual outlet must be
fitted with an elbow trap.
After routing and connecting condensate lines, pour water into the collecting pan and check that
it drains correctly.
An auxiliary condensate pump could be installed in cases where drain lines cannot be routed at
the correct gradient.
Condensate drain connection
10
INSTALLATION OF UNIT
ENGLISH
Preparation of piping
Cut the piping and the cable
- Use the accessory piping kit or the pipes
purchased locally.
- Measure the distance between the Indoor
and the Outdoor Unit
- Cut the cable 1.5 m. Longer than the pipe
length
Remove burrs
- Remove burrs from cut edges of pipes.
- Turn the pipe and down to avoid the metal
powder entering the pipe.
Flaring the pipes
- Insert the flare nuts, mounted on the con-
nection ports of both Indoor and Outdoor
Unit, onto the copper pipes.
- Fit the copper pipe end into the bar of flare
tool about 0-0.5mm. Higher. (see illustra-
tion.)
- Flare the pipe ends.
Tape the flaring portion to protect it from the
dust or damages.
Pipe Cutter
Pipe
Reamer
Slanted Rough
90°
Point down
Bar
Bar
Copper pipe
Clamp handle
0-0.5 mm.
Handle
Yok e
Clone
Red arrow mark
Improper flaring
Inclined
When properly flared, the internal surface of the flare will
evenly shine and be of even thickness, Since the flare pit
comes into contact with the connectors, carefully check
the flare finish.
CrackedSurface
damage
Uneven
thickness
Refrigeration Piping Connections
Unit size
PIPE SIZE
GAS LIQUID
100k 1 1/8 5/8
150k 1 3/8 5/8
If burrs are not removed, they may cause
gas leakage.
CAUTION
!
INSTALLATION OF UNIT
11
ENGLISH
Refrigerant piping connections (FLARE connections)
To avoid alteration of unit capacities, check that piping lengths and changes in elevation are kept
to a strict minimum.
Before connecting the refrigerant lines, follow the procedures below (if precharged connection
lines are not supplied):
- Select copper pipe diameters according to the size of unit to be installed.
- Install the refrigeration lines, checking that no foreign bodies get inside the piping.
- Install the flare connectors and flare the ends of the pipes.
- Evacuate the piping. This operation, which should last at least 15 minutes or even longer if there
are large piping lengths and changes in elevation, should be followed by a leak test.
- To this effect, when the piping has been evacuated, close the pressure gauge tap, note the
value on the gauge, then wait for 15 minutes. If the needle moves, there is a leak in the system.
Make the neccessary adjustments or repairs and repeat this procedure until the needle no
longer moves.
- Open the service valves and top up the refrigerant charge if necessary.
INDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
OUTDOOR UNIT
CHARGE SET
CHARGE SET
VACUMM PUMP
CHARGE
CYLINDER
FLARE JOINT
FLARE JOINT
FLARE VALVE
FLARE VALVE
DISCHAGE
SUCTION
DISCHAGE
SUCTION
12
INSTALLATION OF UNIT
ENGLISH
Guideline for Long Piping System
All information in this document are from some OEMs. Please use this document for guideline
and confirm that the system temperature, pressure,oli and voltage are maintained at normal ap-
proved level.
Equivalent Length
Equivalent Length is the covert length and includes parts such as elbow, which has pressure
losses in the pipe.
Equivalent Length is = Real length of tubing
+ Number of elbow * Equivalent length of each elbow
+ Number of oil trap * Equivalent length of each oil trap
Unit : Feet
Nominal Dia.
Equivalent Length
for Oil Trap (ft.)
3/8 4.3
1/2 4.9
5/8 6.6
3/4 7.9
7/8 9.8
1 11.2
1-1/8 12.1
1-1/4 13.1
INSTALLATION OF UNIT
13
ENGLISH
* Charges are based upon 40 oF suction temperature and 105 oF liquid temperature oz in this
page is mass indicating (1 oz = 28.35g)
Additioanl charge = ( Total piping length - chargeless length ) x additional charge rate
Example : For a R22 system using 3/8 liquid line and a 3/4 suction line with total measured
length of feet and with chargeless length 15 feet,
- Liquid line (50-15 feet) x 0.62 oz/ft = 21.7 oz
- Suction line (50-15 feet) x 0.06 oz/ft = 2.1 oz
- Total additional charge for interconnecting pipe = 23.8 oz
Additional Refrigerant Charge
R410 Line charge
Suction (inch) oz/ft Liquid (inch) oz/ft
1/2 0.04 1/4 0.19
5/8 0.06 5/16 0.33
3/4 0.09 3/8 0.51
7/8 0.12 1/2 1.01
1-1/8 0.2 5/8 1.64
1-3/8 0.31 3/4 2.46
1-5/8 0.43 7/8 3.27
2-1/8 0.76 1-1/8 5.58
2-5/8 1.17
NOTE
!
Chargeless length is depending on each OEM.
14
INSTALLATION OF UNIT
ENGLISH
Long Line Sizing
The following considerations have already been accounted for when relating to the selection
charts.
- R-22 Maximum Pressure Drop is 35 psig
- R-410A Maximum Pressure Drop is 60 Psig
- Increased charge levels
- Maximum recommended velocity of 400 fpm
- Maximum velocity of 4100 fpm
Long line selection Chart:
The charts below the line sizes that can be selected for each tonnage of unit and the maximum
equivalent length and maximum rise of the line. The maximum actual line length is 200 feet.
Equivalent line length would include elbows and other components that would increase the
equivalent length.
R-22 Liquid line, maximum rise chart R-410A Liquid line, maximum rise chart
* Shaded area indicates system needs oil
added (See oil addition section)
Note: Exceeds recommended maximum ve-
locity of 400 fpm, consider noise
when selection this pipe size.
Unit : fr. Unit : fr.
INSTALLATION OF UNIT
15
ENGLISH
Suction Line sizing criteria
The following considerations have already been accounted for when relating to the selection
charts.
- Minimum velocity of 100 fpm for vertical lines and 800fpm for horizontal lines guarantee proper
oil return
- Minimal pressure drop to minimize capacity loss
Suction line Selection Chart:
The charts below show the line sizes that can be selected for each tonnage of nit ang the per-
cent of capacity reduction the system will have because of the long line set application.
The maximum actual line length is 200 feet, equivalent line lengths would include elbows and
other components that would increase the equivalent length.
R22 suction line, capacity reduction chart (%) R410 suction line, capacity reduction chart (%)
Note: (-) Indicates unacceptable pressure drop
in suction line
* Velocity is below 100 fpm, Should only be
used on horizontal line
16
INSTALLATION OF UNIT
ENGLISH
Oil Addition
If the line set you selected is the shaded area of R22 Line, Maximum Rise Chart oil needs to be
added to the compressors. The formula below determines the amount of oil to add to the com-
pressors.
A
OR = (TSC x 0.22 x 16) – (S OC x 0.1)
- TSC = Total System Charge (pounds*)
A rule of thumb is to multiply the amount of refrigerant in the system by 2.2% and multiply this
sor nameplate and add the remaining amount to the system.
This means that most system doesn’t need additional oil unless the refrigerant charge exceeds
35 pounds.
E
xample
Oil separator addition
Oil separator should be added in case of the long piping system as refer to below table.
Model
100K
150K
Long pipe length
Over than 30m
Over than 10m
Oil separator spec or egual
Heldon model 3210-9622
Emerson model A-WZ5589
INSTALLATION OF UNIT
17
ENGLISH
Unit Controller Operation
Wired Remote Controller
HR+ HR- SWEEP SLEEP
LED Display
12
1
10
4
9
7
11
6
3
2
8
5
18
INSTALLATION OF UNIT
ENGLISH
Maintenance
The unit are designed to operate for long periods of time with a minimum of maintenance.
However, the following operations must be performed regularly.
COMPONENTS MAINTENANCE OPERATIONS
RECOMMENDED
FREQUENDED
Air filter
- Clean with a vacuum cleaner or tap gen-
tly then wash in warm water (40 C)with
a mild detergent.
- Rinse and dry before replacing on unit.
- Never use petrol, alcohol or any other
chemical product.
Every month or more often
necessary.
Unit casing
- Remove dust from the front panel with a
soft duster or wipe a dump cloth with a
mild soap solution.
- Never use petrol, alcohol or any other
chemical product.
Every month or more
often necessary.
Drain pan and
evacuation piping
- Clean and check for obstructions. Each season before start up.
Indoor / Outdoor
coils
- Check condition and remove dust from
between coil fins.
Each season before start up.
INSTALLATION OF UNIT
19
ENGLISH
Trouble Shooting
Trouble-shooting Guide
Problem Probable cause and remedy
• The air conditioner does not
run.
- Check that the fuse has not blown or that main circuit
breaker has not tripped.
- Is the main switch in the OFF position ?
- Have you made a mistake when using the programming
functions ?
• The unit does not cool effi-
ciently.
- Is the filter dirty ? See Instructions on how to clean the fil-
ter.
- The room was probably very hot when you started the air
conditioning unit-wait a little while until it has had enough
time to cool the room.
- Have you programed the right temperature ?
• There is a bad smell in the
room.
- Check that the smell is not made by humidity coming from
the walls, carpets, furniture, or other fabrics in the room.
• The air conditioner is noisy.
- There is a noise like shower. This is a noise made by dehu-
midi-fication water being treated inside the unit.
• Condensation water seems
to be running out of the unit.
- Condensates are produced when the air conditioner cools
the air in the room.
• The air conditioner will not
run for 3 minutes after it has
been restarted.
- This is due to a system protection device. Wait 3 minutes
and operation of the unit will resume.
• The remote control handset
display is weak or shows
nothing at all.
- The batteries may need replacing.
- Be careful not to invert the polarities when replacing them.
• The air conditioner does not
respond to remote control
commands, or to direct
forced operation commands.
- The batteries may need replacing.
- Be careful not to invert the polarities when replacing them.
- Contact an approved service centre and have your installa-
tion power supply checked out.
INSTALLATION OF UNIT
21
ENGLISH
Electrical Wiring
Precautions when laying power wiring
Use round pressure terminals for connections
to the power terminal block.
When none are available, follow the instruc-
tions below.
nesses to the power terminal block. (Slack in
the power wiring may cause abnormal heat.)
- When connecting wiring which is the same
- For wiring, use the designated power wire
outside pressure being exerted on the termi-
nal block.
- Use an appropriate screwdriver for tighten-
ing the terinal screws. A screwdriver with a
small head will strip the head and make
proper tighterning impossible.
- Over-tightening the terminal screws may
break them.
Round pressure terminal
Power wire
• The power cable connected to the out-
door unit should be complied with the
tion, type H07RN-F approved by HAR or
SAA) (This equipment shall be provided
with a cable set complying with the na-
tional regulation.)
• T
he connecting cable connected to the
indoor and outdoor unit should be com-
(Rubber insulation, type H07RN-F ap-
proved by HAR or SAA) (This equip-
ment shall be provided with a cable set
complying with the national regulation.)
• If the supply cable is damaged, it must
be replaced by a special cable or as-
sembly availible from the manufacturer
of its service agent.
20 mm
GN /YL
NORMAL
CROSS-SECTIONAL
AREA 0.75 mm
2
20 mm
GN /YL
NORMAL
CROSS-SECTIONAL
AREA 0.82 mm
2
20
mm
GN /YL
NORMAL
CROSS-SECTIONAL
AREA 3.3 mm
2
CAUTION
!
MODEL Area(mm
2
)
ANUC1008A
ANUC1508A
6.0
10.0
MODEL - ANUC1008A / ANNC1008A
MODEL - ANUC1508A / ANNC1508A
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