LG ARWN200LA2 INSTALLATION INSTRUCTIONS
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.your set and retain it for future reference.
P/NO : MFL30215315
www.lg.com
MODELS : ARWN Series
ENGLISH ITALIANO ESPAÑOL FRANCAIS
DEUTSCH
PORTUGUESE
2 Outside Unit
ARWN Series Outside unit Installation Manual
TABLE OF CONTENTS
Safety Precautions .........................................................................................................3
Installation Process .......................................................................................................7
Outside units Information..............................................................................................8
Environment-friendly Alternative Refrigerant R410A ...............................................11
Select the Best Location..............................................................................................11
Installation space ........................................................................................................12
Water control ...............................................................................................................14
Lifting method ..............................................................................................................16
Installation ....................................................................................................................17
Refrigerant piping installation ....................................................................................21
Device protection unit..................................................................................................26
Refrigerant piping system ..........................................................................................28
Y branch pipe and header branch pipe type .............................................................45
Leakage test and vacuum ...........................................................................................47
Electrical Wiring ...........................................................................................................49
Test Run ........................................................................................................................67
Cooling tower applied method ...................................................................................76
Caution For Refrigerant Leak......................................................................................77
Water Solenoid Valve Control .....................................................................................79
Variable Water Flow Control KIT(Accessory) ...........................................................80
Installation Manual 3
ENGLISH
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
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 injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
n Installation
Have all electric work done by a licensed
electrician according to "Electric Facility
Engineering Standard" and "Interior Wire
Regulations" and the instructions given in
this manual and always use a special circuit.
• If the power source capacity is inadequate or electric work
is performed improperly, electric shock or fire may result.
Ask the dealer or an authorized technician to
install the air conditioner.
• Improper installation by the user may result in water leakage, electric shock, or fire.
Always ground the product.
• 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.
For re-installation of the installed product,
always contact a dealer or an Authorized
Service Center.
• There is risk of fire, electric shock, explosion, or injury.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not install the unit at the outdoor.
• Otherwise it may cause fire, electric shock and trouble.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the product.
4 Outside Unit
Safety Precautions
Ventilate before operating air conditioner
when gas leaked out.
• It may cause explosion, fire, and burn.
Securely install the cover of control box and
the panel.
• If the cover and panel are not installed securely, dust or
water may enter the outside unit and fire or electric shock
may result.
If the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration from exceeding the safety limit when the refrigerant leaks.
• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.
n Operation
Do not damage or use an unspecified power
cord.
• There is risk of fire, electric shock, explosion, or injury.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product damage.
Do not touch the power switch with wet
hands.
• There is risk of fire, electric shock, explosion, or injury.
When installing and moving the air conditioner to another site, do not charge it with a
different refrigerant from the refrigerant
specified on the unit.
• If a different refrigerant or air is mixed with the original
refrigerant, the refrigerant cycle may malfunction and the
unit may be damaged.
Do not reconstruct to change the settings of
the protection devices.
• If the pressure switch, thermal switch, or other protection
device is shorted and operated forcibly, or parts other than
those specified by LGE are used, fire or explosion may
result.
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Be cautious not to touch the sharp edges
when installing.
• It may cause injury.
Take care to ensure that nobody could step
on or fall onto the outside unit.
• This could result in personal injury and product damage.
Do not open the inlet grille of the product
during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock, or product
failure.
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.
Installation Manual 5
ENGLISH
Safety Precautions
n Installation
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Do not install the product where the noise or
hot air from the outside unit could damage
the neighborhoods.
• It may cause a problem for your neighbors.
Keep level even when installing the product.
• To avoid vibration or water leakage.
Do not install the unit where combustible gas
may leak.
• If the gas leaks and accumulates around the unit, an
explosion may result.
Use power cables of sufficient current
carrying capacity and rating.
• Cables that are too small may leak, generate heat, and
cause a fire.
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
• There is risk of damage or loss of property.
Keep the unit away from children. The heat
exchanger is very sharp.
• It can cause the injury, such as cutting the finger. Also the
damaged fin may result in degradation of capacity.
When installting the unit in a hospital, communication station, or similar place, provide
sufficient protection against noise.
•
The inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or
fail to operate. On the other hand, the air conditioner may
affect such equipment by creating noise that disturbs medical
treatment or image broadcasting.
n Operation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly reduce the
performance of the air conditioner or damage its parts.
Do not block the inlet or outlet.
• It may cause failure of appliance or accident.
Make the connections securely so that the
outside force of the cable may not be applied
to the terminals.
• Inadequate connection and fastening may generate heat
and cause a fire.
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, or personal
injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
• A bad connection may cause water leakage.
6 Outside Unit
Safety Precautions
Safely dispose of the packing materials.
•
Packing materials, such as nails and other metal or wooden
parts, may cause stabs or other injuries.
•
Tear apart and throw away plastic packaging bags so that
children may not play with them. If children play with a plastic
bag which was not torn apart, they face the risk of suffocation.
Turn on the power at least 6 hours before
starting operation.
• Starting operation immediately after turning on the main
power switch can result in severe
damage to internal parts. Keep the power switch turned on
during the operational season.
Be very careful about product transportation.
• Only one person should not carry the product if it weighs more than 20 kg.
• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fingers.
• When transporting the outside unit, suspending it at the specified positions on the unit base. Also support the outside unit
at four points so that it cannot slip sideways.
Do not touch any of the refrigerant piping
during and after operation.
• It can cause a burn or frostbite.
Do not operate the air conditioner with the
panels or guards removed.
• Rotating, hot, or high-voltage parts can cause injuries.
Do not directly turn off the main power
switch after stopping operation.
• Wait at least 5 minutes before turning off the main power
switch. Otherwise it may result in water leakage or other
problems.
Auto-addressing should be done in condition of
connecting the power of all indoor and outdoour
units. Auto-addressing should also be done in
case of changing the indoor unit PCB.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
• Be careful and avoid personal injury.
Select Installation Location
Installation Manual 7
ENGLISH
Installation Process
• The above list indicates the order in which the individual work operations are normally carried out but this order may be
varied where local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa.
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)
Determination of division work
Preparation of contract drawings
Sleeve and insert work
Installation of indoor unit
Refrigerant piping work
Drain pipe work
Duct work
Heat insulation work
Electrical work
(connection circuits and drive circuits)
Airtight test
Vacuum drying
Additional charge of refrigerant
Indicate clearly who is to be responsible for switch settings
Make relationship between outside, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Take account of gradient
of drain piping
Check model name to make
sure the fitting is made correctly
Special attention to dryness,
cleanness and tightness
Adjust to downward gradient
Make sure airflow is sufficient
Make sure no gaps are left where
the insulating materials are joined
Multiple core cable must not be used.
(suitable cable should be selected)
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Outside unit foundation work
Installation of outside unit
2
) there must be no drop in pressure.
The foundation must be level even
Avoid short circuits and ensure
sufficient space is allowed for service
Fit facing panels
Automatic addressing of indoor unit
Test run adjustment
Transfer to customer with explanation
Make sure there are no gaps left between the facing materials used on the ceiling
Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
Outside units Information
8 Outside Unit
Outside units Information
Power Supply: Outside Unit (3Ø, 380 ~ 415V, 50/60Hz)
n Heat pump
• Ratio of the running Indoor Units to the Outside: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each indoor unit capacity.
n Combination Ration(50~200%)
Notes:
* We can guarantee the operation only within 130% Combination. If you want to connect more than
130% combination, please contact us and discuss the requirement like below.
1) If the operation of indoor unit is more than 130%, low airflow operation is recommended in all
the indoor units.
2) If the operation of indoor unit is more than 130%, additional refrigerant is needed according to
the Äheadquarter guidance.
3)Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input.
Outside Number Connection Capacity
Single outside units 200%
Double outside units 160%
Triple outside units 130%
Unit
1 Unit
System(HP)
8 10 16 18 20
Model
ARWN80LA2 ARWN100LA2 ARWN160LA2 ARWN180LA2 ARWN200LA2
ARWN80LA2 ARWN100LA2 ARWN160LA2 ARWN180LA2 ARWN200LA2
Product Charge
kg
7.3 7.3 8.8 8.8 8.8
CF(Correction Factor)
kg
0 0 0 0 0
Max. Connectable No. of Indoor Units
13 16 26 29 32
Net Weight
kg
154 154 223 223 223
Dimension(Wx H x D)
mm
772 x 1,120 x 547 772 x 1,120 x 547 772 x 1,120 x 547 772 x 1,120 x 547 772 x 1,120 x 547
inch
30.4 x 44.1 x 21.5 30.4 x 44.1 x 21.5 30.4 x 44.1 x 21.5 30.4 x 44.1 x 21.5 30.4 x 44.1 x 21.5
Refrigerant
Connecting Pipes
Liquid(mm/inch)
9.52(3/8) 9.52(3/8) 12.7(1/2) 12.7(1/2) 12.7(1/2)
Gas(mm/inch)
22.2(7/8) 22.2(7/8) 28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)
Water Connecting Pipes
Inlet
PT32A (internal thread) PT32A (internal thread) PT40A (internal thread) PT40A (internal thread) PT40A (internal thread)
Outlet
PT32A (internal thread) PT32A (internal thread) PT40A (internal thread) PT40A (internal thread) PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread) 20mm (internal thread) 20mm (internal thread) 20mm (internal thread)
Range of Operation
Water Temp.
Cooling(°C)
10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45
Unit
2 Unit
System(HP)
24 26 28 30
Model
ARWN240LA2 ARWN260LA2 ARWN280LA2 ARWN300LA2
ARWN160LA2 ARWN160LA2 ARWN180LA2 ARWN200LA2
ARWN80LA2 ARWN100LA2 ARWN100LA2 ARWN100LA2
Product Charge
kg
7.3+8.8 7.3+8.8 7.3+8.8 7.3+8.8
CF(Correction Factor)
kg
0 0 0 0
Max. Connectable No. of Indoor Units
39 42 45 48
Net Weight
kg
154+223 154+223 154+223 154+223
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2
inch
(30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4) 19.05(3/4) 19.05(3/4)
Gas(mm/inch)
34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8)
Water Connecting Pipes
Inlet
PT32A + PT40A (internal thread) PT32A + PT40A (internal thread) PT32A + PT40A (internal thread) PT32A + PT40A (internal thread)
Outlet
PT32A + PT40A (internal thread) PT32A + PT40A (internal thread) PT32A + PT40A (internal thread) PT32A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread) 20mm (internal thread) 20mm (internal thread)
Range of Operation
Water Temp.
Cooling(°C)
10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45 10 ~ 45 10 ~ 45
Outside units Information
Installation Manual 9
ENGLISH
Unit
2 Unit
System(HP)
32 34 36
Model
ARWN320LA2 ARWN340LA2 ARWN360LA2
ARWN160LA2 ARWN180LA2 ARWN180LA2
ARWN160LA2 ARWN160LA2 ARWN180LA2
Product Charge
kg
8.8+8.8 8.8+8.8 8.8+8.8
CF(Correction Factor)
kg
0 0 0
Max. Connectable No. of Indoor Units
52 55 58
Net Weight
kg
223+223 223+223 223+223
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2
inch
(30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4) 19.05(3/4)
Gas(mm/inch)
41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT40A + PT40A (internal thread) PT40A + PT40A (internal thread) PT40A + PT40A (internal thread)
Outlet
PT40A + PT40A (internal thread) PT40A + PT40A (internal thread) PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread) 20mm (internal thread)
Range of Operation
Water Temp.
Cooling(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Unit
3 Unit
System(HP)
42 44 46
Model
ARWN420LA2 ARWN440LA2 ARWN460LA2
ARWN160LA2 ARWN180LA2 ARWN180LA2
ARWN160LA2 ARWN160LA2 ARWN180LA2
ARWN100LA2 ARWN100LA2 ARWN100LA2
Product Charge
kg
8.8+8.8+7.3 8.8+8.8+7.3 8.8+8.8+7.3
CF(Correction Factor)
kg
0 0 0
Max. Connectable No. of Indoor Units
64 64 64
Net Weight
kg
223+223+154 223+223+154 223+223+154
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3
inch
(30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4) 19.05(3/4)
Gas(mm/inch)
41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread)
Outlet
PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread) 20mm (internal thread)
Range of Operation
Water Temp.
Cooling(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Unit
2 Unit
System(HP)
38 40
Model
ARWN380LA2 ARWN400LA2
ARWN200LA2 ARWN200LA2
ARWN180LA2 ARWN200LA2
Product Charge
kg 8.8+8.8 8.8+8.8
CF(Correction Factor)
kg 0 0
Max. Connectable No. of Indoor Units
61 64
Net Weight
kg 223+223 223+223
Dimension(Wx H x D)
mm (772 x 1,120 x 547) x 2 (772 x 1,120 x 547) x 2
inch (30.4 x 44.1 x 21.5) x 2 (30.4 x 44.1 x 21.5) x 2
Refrigerant
Connecting Pipes
Liquid(mm/inch) 19.05(3/4) 19.05(3/4)
Gas(mm/inch) 41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT40A + PT40A (internal thread) PT40A + PT40A (internal thread)
Outlet
PT40A + PT40A (internal thread) PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread)
Range of Operation Water
Temp.
Cooling(°C) 10 ~ 45 10 ~ 45
Heating(°C) 10 ~ 45 10 ~ 45
Outside units Information
10 Outside Unit
Unit
3 Unit
System(HP)
48 50
Model
ARWN480LA2 ARWN500LA2
ARWN200LA2 ARWN200LA2
ARWN180LA2 ARWN200LA2
ARWN100LA2 ARWN100LA2
Product Charge
kg
8.8+8.8+7.3 8.8+8.8+7.3
CF(Correction Factor)
kg
0 0
Max. Connectable No. of Indoor Units
64 64
Net Weight
kg
223+223+154 223+223+154
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3
inch
(30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4)
Gas(mm/inch)
41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread)
Outlet
PT32A + PT40A + PT40A (internal thread) PT32A + PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread)
Range of Operation Water
Temp.
Cooling(°C)
10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45
Unit
3 Unit
System(HP)
52 54
Model
ARWN520LA2 ARWN540LA2
ARWN180LA2 ARWN200LA2
ARWN180LA2 ARWN180LA2
ARWN160LA2 ARWN160LA2
Product Charge
kg
8.8+8.8+8.8 8.8+8.8+8.8
CF(Correction Factor)
kg
0 0
Max. Connectable No. of Indoor Units
64 64
Net Weight
kg
223+223+223 223+223+223
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3
inch
(30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4)
Gas(mm/inch)
41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread)
Outlet
PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread)
Range of Operation Water
Temp.
Cooling(°C)
10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45
Unit
3 Unit
System(HP)
56 58 60
Model
ARWN560LA2 ARWN580LA2 ARWN600LA2
ARWN200LA2 ARWN200LA2 ARWN200LA2
ARWN180LA2 ARWN200LA2 ARWN200LA2
ARWN180LA2 ARWN180LA2 ARWN200LA2
Product Charge
kg
8.8+8.8+8.8 8.8+8.8+8.8 8.8+8.8+8.8
CF(Correction Factor)
kg
0 0 0
Max. Connectable No. of Indoor Units
64 64 64
Net Weight
kg
223+223+223 223+223+223 223+223+223
Dimension(Wx H x D)
mm
(772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3 (772 x 1,120 x 547) x 3
inch
(30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3 (30.4 x 44.1 x 21.5) x 3
Refrigerant
Connecting Pipes
Liquid(mm/inch)
19.05(3/4) 19.05(3/4) 19.05(3/4)
Gas(mm/inch)
41.3(1 5/8) 41.3(1 5/8) 41.3(1 5/8)
Water Connecting Pipes
Inlet
PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread)
Outlet
PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread) PT40A + PT40A + PT40A (internal thread)
Drain Outlet
20mm (internal thread) 20mm (internal thread) 20mm (internal thread)
Range of Operation
Water Temp.
Cooling(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Heating(°C)
10 ~ 45 10 ~ 45 10 ~ 45
Environment-friendly Alternative Refrigerant R410A
Installation Manual 11
ENGLISH
Select the Best Location
Select space for installing outside unit, which will meet the following conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
• Do not use unit under any special environment where oil, steam and sulfuric gas exist.
• It is recommended to fence round the outside unit in order to prevent any person or animal from accessing the
outside unit.
• This product is prohibited for outdoor installation.
• Select installation location considering following conditions to avoid bad condition when additionally performing
defrost operation.
1. Install the outside unit at a place well ventilated and having a lot of sunshine in case of installing the product
at a place with a high humidity in winter (neare beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
2. Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of
installing the outside unit in winter at following location:
(1) Shade position with a narrow space
(2) Location with much moisture in neighboring floor.
(3) Location with much humidity around.
(4) Location where water gathers since the floor is not even.
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is
0. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.
Environment-friendly Alternative Refrigerant R410A
CAUTION:
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed
pressure 3.8MPa
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be used.
• Do not heat pipes more than necessary to prevent them from softening.
• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.
12 Outside Unit
Installation space
Installation space
Individual Installation
Collective / Continuous Installation
Required the minimum space as shown below for installation and
check. If the space is not fit on this drawing, consult with LG.
Space required for collective installation and continuous installation as shown below considering passage for air
and people.
: Service area
* In case of the water pipe passing side product, please make sufficient service place to avoid occurring
between water pipe and product side.
: Service area
Water pipe
installation
space
20
Product
(Outside unit)
Service area
(Front)
350
772
20
600 547
100
H-Beam Support
<Top View> <Front View>
(Unit : mm)
(unit : mm)
1120 100100
Product
(Outside unit)
350
100
100 100
772
Product
(Outside unit)
350
<Top view>
100
600 547 20
Product
(Outside unit)
350
772772
(Unit : mm)
20
600 547
100
20
20
Product
(Outside unit)
350
772
Product
(Outside unit)
350
772
<Top view>
Installation Manual 13
ENGLISH
Installation space
Two Layer Installation
Space required for two layer installation as shown below considering passage for air and people.
: Service area
(unit : mm)
100
112 0
100
1120 100
H-Beam Support
<Front View>
100
14 Outside Unit
Water control
Water control
• Keep the water temperature between 10~45°C. Other it may cause the breakdown.
- Standard water supply temperature is 30°C for Cooling and 20°C for heating.
• Properly control the water velocity. Otherwise it may cause the noise, pipe vibration or pipe contraction, expansion
according to the temperature. Use the same water pipe size connected with the product or more.
• Refer to the water source pipe diameter and water velocity table below. As the water velocity is fast, air bubble will
increase.
• Be careful of the water purity control. Otherwise it may cause the breakdown due to water pipe corrosion.
(Refer to 'Standard Table for Water Purity Control')
• In case the water temperature is above 40°C, it is good to prevent the corrosion by adding the anticorrosive agent.
• Install the pipe, valve and gauge sensor in the space where it is easy to maintain. Install the water valve in the low
position for drain, if required.
• Be careful not to let air in. If so, the water velocity will be unstable in the circulation, pump efficiency will also
decrease and may cause the piping vibration. Therefore, install the air purge where it may generate the air.
• Choose the following anti freezing methods. Otherwise, it will be dangerous for the pipe to break in the winter.
- Circulate the water with the pump before dropping the temperature.
- Keep the normal temperature by boiler.
- When the cooling tower is not operated for a long time, drain the water in the cooling tower.
- Use an anti-freeze. (For using an anti freeze, change the DIP switch on main PCB in outside unit.)
- Refer to the additive amount about freezing temperature as in the table given below.
• In addition to anti freeze, it may cause the change of the pressure in the water system and the low performance of
the product.
• Make sure to use the closed cooling type tower.
When applying the open type cooling tower, use a 2
nd
heat exchanger to make the water supply system a closed
type system.
Diameter (mm) Velocity range (m/s)
< 50 0.6 ~ 1.2
50 ~ 100 1.2 ~ 2.1
100 < 2.1 ~ 2.7
Minimum temperature for anti freezing (°C)
0 -5 -10 -15 -20 -25
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
Methanol (%) 0 6 12 16 24 30
Anti freeze type
Water control
Installation Manual 15
ENGLISH
Water control
Standard table for water purity control
The water may contain many foreign substances and hence may influence the performance and lifetime of the product due to the corrosion of the condenser and water pipe. (Use water source that complies with the below standard
table for water purity control.)
If you use water supply other than the tap water to supply the water for the cooling tower, you must do a water quality
inspection.
• If you use the closed cooling tower, the water quality must be controlled in accordance with the following standard
table.
If you do not control the water quality in accordance with the following standard water quality table, it can cause performance deterioration to the air conditioner and severe problem to the product
[Reference]
(1) The "O" mark for corrosion and scale means that there is possibility of occurrence.
(2) When the water temperature is 40°C or above or when uncoated iron is exposed to the water, it can result in corro-
sion. Therefore adding anti-corrosion agent or removing the air can be very effective.
(3) In case of using the closed type cooling tower, the cooling water and supplementing water must satisfy the water quali-
ty criteria of closed type system in the table.
(4) Supplementing water and supplied water must be supplied with tap water, industrial water and underground water
excluding filtered water, neutral water, soft water etc.
(5) 15 items in the table are general causes of corrosion and scale.
Items
pH(25C)
Conductivity[25C](mS/m)
Chlorine ion(mg CI-/l)
Sulfuric acid ion(mg SO
2
/l)
Acid demand[pH 4.8] (mg SiO2/l)
Total hardness(mg SiO2/l)
Ca hardness(mg CaCO3/l)
Ion silica(mg SiO2/l)
Fe(mg Fe/l)
Copper(mg Cu/l)
Sulfuric acid ion(mg S2/l)
Ammonium ion(mg NH4/l)
Residual chlorine(mg Cl/l)
Free carbon dioxide(mg CO2/l)
Stability index
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
Below 1.0
Below 1.0
Must not be detected
Below 0.3
Below 0.25
Below 0.4
-
Below 0.3
Below 0.1
Must not be detected
Below 0.1
Below 0.3
Below 4.0
-
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
O
O
O
O
-
-
-
-
O
O
O
O
O
O
O
O
-
-
-
-
-
O
O
O
-
O
O
O
O
O
Closed type
Basic Item
Reference Item
Effect
Circulating water Supplemented water Corrosion Scale
4
+
16 Outside Unit
Lifting method
Lifting method
• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at
the front and rear.
• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
CAUTION
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than 20kg.
• PP bands are used to pack some products. Do not use them as a mean for transportation because they
are dangerous.
• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging
bag may suffocate children to death.
• When carrying in Outside Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outside Unit unstable, resulting in a fall.
• Use 2 belts of at least 8 m long.
• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent
damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
Sub line
A
40 or less
B
Rope supporter
Installation Manual 17
ENGLISH
Installation
Installation
Location of anchor bolt
The location of
anchor bolt
59
50
13
599
658
(Unit: mm)
WARNING
• Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a personal injury.
• Have installation work in order to protect against a strong wind and earthquake. Any installation
deficiency may cause unit to fall down, resulting in a personal injury.
• Especially take care for support strength of the floor surface, water drain processing (processing of
water flown out from the outside unit during operation) and paths of the pipe and wiring when making a base support.
18 Outside Unit
Installation
Preparation of Piping
1) Cut the pipes and the cable.
n Use the accessory piping kit or the pipes purchased
locally.
n Measure the distance between the indoor and the out-
side unit.
n Cut the pipes a little longer than measured distance.
n Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
n Completely remove all burrs from the cut cross section
of pipe/tube.
n Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Flaring work
n Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4) Check
n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Pipe " A "
Gas Liquid Gas
Liquid
<5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5
<16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8
<22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8
Indoor unit
[kW(Btu/h]
Copper
tube
90
Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Installation Manual 19
ENGLISH
Installation
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, use nitrogen to perform a gas leak check.
Tightening torque
Union
CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are
present.
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
Opening shutoff valve
Closing shutoff valve
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
pipe size tightening torque(Ncm) A(mm) flare shape
Ø9.5 3270-3990 12.8-13.2
Ø12.7 4950-6030 16.2-16.6
Ø15.9 6180-7540 19.3-19.7
Shut off Valve size Flare nut Cap (valve Lid) Valve Core Service port Heagonal wrench
Φ6.35(1/4”) (7/16-20UNF) 16.0±2.0 17.6±2.0 3.0 12.7±2.0 6.0±0.6
Φ9.52(3/8”) (5/86-18UNF) 38.0±4.0 17.6±2.0 3.0 12.7±2.0 6.0±0.6
Φ12.7(1/2”) (3/4-16UNF) 55.0±6.0 20.0±2.0 3.0 12.7±2.0 9.0±0.9
Φ15.88(5/8”) (7/8-14UNF) 75.0±7.0 25.0±2.5 3.0 12.7±2.0 15.0±1.5
Φ19.05(3/4”) (1/16-UNS) 110.0±10.0 25.0±2.5 3.0 12.7±2.0 30.0±3.0
Φ22.2(7/8”) - 25.0±2.5 3.0 12.7±2.0 30.0±3.0
Φ25.4(1”) - 25.0±2.5 3.0 12.7±2.0 30.0±3.0
±2
90°
45°
±2
A
R=0.4~0.8
20 Outside Unit
Installation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the
"ISO Conditions with Mist" and confirmed that there is
not any default. However, if it is operated for a long
time in high humid atmosphere (dew point temperature: more than 23°C), water drops are liable to fall. In
this case, add heat insulation material according to the
following procedure:
• Heat insulation material to be prepared... EPDM
(Ethylene Propylene Diene Methylene)-over 120°C
the heat-resistance temperature.
• Add the insulation over 10mm thickness at high humidity environment.
HEAT INSULATION
Indoor unit
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
Installation Manual 21
ENGLISH
Refrigerant piping installation
WARNING
After completing work, securely tighten both service ports and caps so that gas does not leak.
Refrigerant piping installation
WARNING
Always use extreme care to prevent the refrigerant gas (R410A) from leakage while using fire or
flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it
breaks down and generates a poisonous gas which can cause gas poisoning. Never perform brazing
in an unventilated room. Always conduct an inspection for gas leakage after installation of the refrigerant piping has been completed.
① Pipe joint (auxiliary parts): Securely perform brazing with
a nitrogen blow into the service valve port.(Releasing
pressure : 0.02 MPa or less)
② Flare nut: Loose or tighten flare nut by using the wrench
with both ends. Coat the flare connection part with oil for
the compressor.
③ Cap: Remove caps and operate valve, etc. After opera-
tion, always reattach caps (tightening torque of valve
cap: 25Nm (250kg-cm) or more). (Don't remove the
internal part of the port)
④ Service port: Make the refrigerant pipe vacuum and
charge it using the service port. Always reattach caps
after completing work (tightening torque of service cap:
14Nm (140kg-cm) or more).
⑤ Liquid pipe
⑥ Gas pipe
⑦ Elbow joint (field supply)
Cautions in pipe connection/valve operation
Liquid pipe
Gas pipe
High/Low pressure common pipe
h Remove the front panel before pipe connection
h Must check the pipe (liquid pipe, gas pipe, high/low pressure
common pipe) before pipe connection
Cut both the pipe and the valve with a
cutter to suit the length
(Don't cut the length of less than 70mm)
Open status when both the pipe and
the valve are in a straight line.
CLOSE OPEN
Ball Valve(Liquid Pipe)
Elbow
Ball Valve(Gas Pipe)
22 Outside Unit
Refrigerant piping installation
Connection of Outside units
Viewed from point A
in direction of arrow
Within +/- 10
Do not cut for
70mm or less
Execute the
welding while
pouring nitrogen
[mm(inch)]
2 Unit
3 Unit
ARCNN21
ARCNN31
A
130(5-1/8)
416(16-3/8)
331(13-1/32)
314(12-3/8)
408(16-1/16)
111(4-3/8)
I.D.38.1(1-1/2)
I.D.34.9(1-3/8)
I.D.34.9(1-3/8)
O.D.34.9(1-3/8)
O.D.19.05(3/4)
O.D.15.88(5/8)
O.D.19.05(3/4)
O.D.19.05(3/4)
O.D.34.9(1-3/8)
125(4-29/32)
406(15-31/32)
353(13-29/32)
111(4-3/8)
I.D.41.3(1-5/8)
I.D.41.3(1-5/8)
I.D.31.8(1-1/4)
I.D.28.58(1-1/8)
I.D.19.05(3/4)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.22.2(7/8)
I.D.22.2(7/8)
110(4-11/32)
120(4-23/32)
120(4-23/32)
I.D.22.2(7/8)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.9.52(3/8)
I.D.41.3(1-5/8)
70(2-3/4)
83(3-9/32)
334(13-5/32)
281(11-1/16)
83(3-9/32)
Outdoor units Model Gas pipe Liquid pipe
I.D.
9.52(3/8)
O.D. 19.05(3/4)
I.D. 15.88(5/8)
O.D. 12.7(1/2)
I.D. 12.7(1/2)
I.D. 6.35(1/4)
X2
110(4-11/32)
110(4-11/32)
I.D.9.52(3/8)
I.D.22.2(7/8)
I.D.19.05(3/4)
O.D.28.58(1-1/8)
I.D.22.2(7/8)
I.D.19.05(3/4)
O.D.28.58(1-1/8)
I.D34.9(1-3/8)
I.D38.1(1-1/2)
When installing the branch pipe vertically between the outside units, the refrigerant can be
uneven between the outside units, leading to compressor burn and reduced capacity
* Install the branch pipe between outside units so that the outlet pipe is parallel to the surface.
Installation Manual 23
ENGLISH
Refrigerant piping installation
Slave
Outside Unit
Master
Outside Unit
Slave1
Outside
Unit
Slave2
Outside
Unit
Main
Outside Unit
1) For the high/low pressure common pipe, connect both master outside unit and slave outside units to the pipe by using
elbows.
2) For cutting the pipe, connect the high/low pressure common pipe after removing burrs, dusts and foreign material within
the pipe. Otherwise, the product may not operate due to sludge within the pipe.
3) For the working part leakage test, apply the nitrogen gas pressure of 3.8MPa (38.7kgf/cm
2
).
4) The vacuum criteria is to maintain the vacuum level to less than 5 Torr 1 hour after reaching 5 Torr. (Execute the vacuum
work again when it is below the criteria.)
5) Open the valve with the hexagon wrench.
2 Outside Units 3 Outside Units
Connection of High/Low Pressure Common pipe
24 Outside Unit
Refrigerant piping installation
1) Water pipe system diagram
• The water pressure resistance of the water pipe system of this product is 1.98MPa
• When the water pipe passes indoors, make sure to execute heat insulation on the pipe so that water drops do not form on
the outer side of the water pipe.
• The size of the drain pipe must be equal to or larger than the diameter of the connecting product.
- Always install a trap so that the drained water does not back flush.
• Always install a strainer (50Mesh or above) at the entrance of the water pipe. (When sand, trash, rusted pieces get mixed
into the water supply, it can cause problems to the product due to blocking)
- If On/Off valve is applied, by interlocking with outside unit, it can save the energy consumption of pump by blocking the
water supply to the outside unit not operating. Select appropriate valve and install on site if necessary.
• Install a pressure gauge and temperature gauge at the inlet and outlet of the water pipe.
• Flexible joints must be installed not to cause any leakage from the vibration of pipes.
• Install a service port to clean the heat exchanger at the each end of the water inlet and outlet.
• For the components of the water pipe system, always use components above the designed water pressure.
2) Water pipe connection
• The water pipe should be the same size of the connection on the product or more.
• If necessary install the insulation material in the water pipe inlet/outlet to prevent water drop, freeze and to save energy.
(Use the above 20mm thickness PE insulation material.)
• Tightly connect the socket to the water pipe refer to below table for recommended specification.
(Too much torque may cause the damage of the facility.)
Do not directly connect the drain outlet to the water pipe outlet.
(It can cause problems to the product.)
Installation of water pipe
Water pipe
outlet
Water pipe
Inlet
Pressure gauge
Gate valve
Gate valve
Temperature gauge
Service port
Strainer
Service port
Drain line
Condensed
water drain
Installation Manual 25
ENGLISH
Refrigerant piping installation
Water pipe
connection
Water pipe inlet
Water pipe outlet
mm inch (kN) (kgf) (kN) (kgf) (N.m) (kgf.m)(N.m) (kgf.m)
12.7 1/2 3.5 350 2.5 250 20 23 5 3.5
19.05 3/4 12 1200 2.5 250 20 2 115 11.5
25.4 1 11.2 1120 4 400 45 4.5 155 15.5
31.8 1 1/4 14.5 1450 6.5 650 87.5 8.75 265 26.5
38.1 1 1/2 16.5 1.7 9.5 0.95 155 16 350 35.5
50.8 2 21.5 2.2 13.5 1.4 255 26 600 61
Pipe thickness Shear stress Tensile stress Bending moment Torque
Loading...