Lg Arun160lt2 Installation Guide
System
Outdoor Unit
INSTALLATION MANUAL
LG
MODELS: ARUV Series
ARUN Series
website http://www.lgservice.com
IMPORTANT
• 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.
R410A
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
PORTUGUESE
2 Outdoor Unit
ARUV(N) Series Outdoor unit Installation Manual
TABLE OF CONTENTS
Safety Precautions .................................................................................................3
Installation Process................................................................................................7
Outdoor units Information.....................................................................................8
Environment-friendly Alternative Refrigerant R410A ......................................13
Select the Best Location......................................................................................13
Installation Space.................................................................................................14
Lifting method ......................................................................................................18
Installation ............................................................................................................19
Refrigerant piping installation ............................................................................24
Electrical Wiring ...................................................................................................52
Test Run ................................................................................................................71
Caution For Refrigerant Leak..............................................................................93
Installation guide at the seaside....................................................................................95
ENGLISH
Installation Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■ 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.
■ 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 intstall 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.
Prepare for strong wind or earthquake and
install the unit at the specified place.
• Improper installation may cause the unit to topple and result in injury.
Do not install the product on a defective
installation stand.
• It may cause injury, accident, or damage to the
product.
4 Outdoor 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 outdoor 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.
■ 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 outdoor 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.
■ 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 outdoor unit could damage
the neighborhoods.
• It may cause a problem for your neighbors.
Installation Manual 5
ENGLISH
Safety Precautions
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.
Do not install the product where it is 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.
■ 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 Outdoor 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 outdoor unit, suspending it at the specified positions on the unit base. Also
support the outdoor 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.
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
• There are sharp and moving parts that could
cause personal injury.
Installation Process
Installation Process
The foundation must be level even
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outdoor unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to make
sure the fitting is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make relationship between outdoor, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Preparation of contract drawings
Indicate clearly who is to be responsible for switch settings
Determination of division work
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than 6 hours.
• 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.)
ENGLISH
Installation Manual 7
8 Outdoor Unit
Outdoor units Information
Outdoor units Information
Power Supply: Outdoor Unit (3Ø, 380 ~ 415V, 50Hz)
■ Heat pump
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Outdoor Unit
56810
ARUN50LT2 ARUN60LT2 ARUN80LT2 ARUN100LT2
ARUN50LT2 ARUN60LT2 ARUN80LT2 ARUN100LT2
4.5 4.5 8 8
00-10
8(12) 10(12) 13(20) 16(25)
175 175 240 285
806x1607x730 806x1607x730 1280x1607x730 1280x1607x730
31.7x63.3x28.7 31.7x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7
9.52 (3/8) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8)
15.88 (5/8) 19.05 (3/4) 19.05 (3/4) 22.2 (7/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Unit 2 Units
12 14 16 18
ARUN120LT2 ARUN140LT2 ARUN160LT2 ARUN180LT2
ARUN120LT2 ARUN140LT2 ARUN160LT2 ARUN120LT2
ARUN60LT2
8 8 8 4.5+8
1231
20(30) 23(35) 26(40) 29(36)
285 285 285 175+285
1280x1607x730 1280x1607x730 1280x1607x730 (1280x1607x730)
+(806X1607X730)
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 (50.4x63.3x28.7)
+(31.7x63.3x28.7)
12.7 (1/2) 12.7 (1/2) 12.7 (1/2) 15.88 (5/8)
28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
• Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each indoor unit capacity.
■ 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.
Outdoor Number Connection Capacity
Single outdoor units 200%
Double outdoor units 160%
Triple outdoor units 130%
ENGLISH
Installation Manual 9
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units 3 Units
28 30 32 34
ARUN280LT2 ARUN300LT2 ARUN320LT2 ARUN340LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN140LT2 ARUN140LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2
8x2 8x2 8x2 4.5+8x2
4564
45(56) 49(60) 52(64) 55(64)
285x2 285x2 285x2 175+285x2
(1280x1607x730)x 2 (1280x1607x730)x 2 (1280x1607x730)x2 (1280x1607x730)x2
+(806X1607X730)
(50.4x63.3x28.7)x 2 (50.4x63.3x28.7)x 2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
+(31.7x63.3x28.7)
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units
20 22 24 26
ARUN200LT2 ARUN220LT2 ARUN240LT2 ARUN260LT2
ARUN140LT2 ARUN60LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2 ARUN160LT2 ARUN80LT2 ARUN120LT2
4.5+8 4.5+8 8x2 8x2
2323
32(40) 35(44) 39(48) 42(52)
175+285 175+285 240+285 285x2
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 2 x 2
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 2 x 2
15.88 (5/8) 15.88 (5/8) 15.88 (5/8) 19.05 (3/4)
28.58 (1 1/8) 28.58 (1 1/8) 34.9 (1 3/8) 34.9 (1 3/8)
10 Outdoor Unit
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
36 38 40 42
ARUN360LT2 ARUN380LT2 ARUN400LT2 ARUN420LT2
ARUN160LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2 ARUN140LT2
ARUN60LT2 ARUN60LT2 ARUN80LT2 ARUN140LT2
4.5+8x2 4.5+8x2 8x3 8x3
5656
58(64) 61(64) 64(64) 64(64)
175+285x2 175+285x2 240+285x2 285x3
(1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 3 x 3
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 3 x 3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
44 46 48
ARUN440LT2 ARUN460LT2 ARUN480LT2
ARUN160LT2 ARUN160LT2 ARUN160LT2
ARUN140LT2 ARUN160LT2 ARUN160LT2
ARUN140LT2 ARUN140LT2 ARUN160LT2
8x3 8x3 8x3
789
64(64) 64(64) 64(64)
285x3 285x3 285x3
(1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
ENGLISH
Installation Manual 11
Outdoor Units Information
■ Cooling Only
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Outdoor Unit
56810
ARUV50LT2 ARUV60LT2 ARUV80LT2 ARUV100LT2
ARUV50LT2 ARUV60LT2 ARUV80LT2 ARUV100LT2
4.5 4.5 4.5 8
0010
8(12) 10(12) 13(20) 16(25)
175 175 175 240
806x1607x730 806x1607x730 806x1607x730 1280x1607x730
31.7x63.3x28.7 31.7x63.3x28.7 31.7x63.3x28.7 50.4x63.3x28.7
9.52 (3/8) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8)
15.88 (5/8) 19.05 (3/4) 19.05 (3/4) 22.2 (7/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
1 Unit 2 Units
12 14 16 18
ARUV120LT2 ARUV140LT2 ARUV160LT2 ARUV180LT2
ARUV120LT2 ARUV140LT2 ARUV160LT2 ARUV120LT2
ARUV60LT2
8 8 8 4.5+8
1231
20(30) 23(35) 26(40) 29(36)
285 285 285 175+285
1280x1607x730 1280x1607x730 1280x1607x730 (1280x1607x730)
+(806X1607X730)
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 (50.4x63.3x28.7)
+(31.7x63.3x28.7)
12.7 (1/2) 12.7 (1/2) 12.7 (1/2) 15.88 (5/8)
28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units
20 22 24 26
ARUV200LT2 ARUV220LT2 ARUY240LT2 ARUY260LT2
ARUV140LT2 ARUV160LT2 ARUV140LT2 ARUV160LT2
ARUV60LT2 ARUV60LT2 ARUV100LT2 ARUV100LT2
4.5+8 4.5+8 8x2 8x2
2323
32(40) 35(44) 39(48) 42(52)
175+285 175+285 240+285 240+285
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)
+(806X1607X730) +(806X1607X730) x 2 x 2
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 2 x 2
15.88 (5/8) 15.88 (5/8) 15.88 (5/8) 19.05 (3/4)
28.58 (1 1/8) 28.58 (1 1/8) 34.9 (1 3/8) 34.9 (1 3/8)
12 Outdoor Unit
Outdoor Units Information
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
2 Units 3 Units
28 30 32 34
ARUV280LT2 ARUV300LT2 ARUV320LT2 ARUV340LT2
ARUV140LT2 ARUV160LT2 ARUV160LT2 ARUV140LT2
ARUV140LT2 ARUV140LT2 ARUV160LT2 ARUV140LT2
ARUV60LT2
8x2 8x2 8x2 4.5+8x2
4564
45(56) 49(60) 52(64) 55(64)
285x2 285x2 285x2 175+285x2
(1280x1607x730) (1280x1607x730) (1280x1607x730) (1280x1607x730)x2
x2 x2 x2 +(806X1607X730)
(50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7) (50.4x63.3x28.7)x2
x2 x2 x2 +(31.7x63.3x28.7)
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
mm
Dimensions
(WxHxD)
inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
36 38 40 42
ARUV360LT2 ARUV380LT2 ARUV400LT2 ARUV420LT2
ARUV160LT2 ARUV160LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV160LT2 ARUV140LT2 ARUV160LT2
ARUV60LT2 ARUV60LT2 ARUV100LT2 ARUV100LT2
4.5+8x2 4.5+8x2 8x3 8x3
5656
58(64) 61(64) 64(64) 64(64)
175+285x2 175+285x2 240+285x2 240+285x2
(1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730) (1280x1607x730)
+(806x1607x730) +(806x1607x730) x 3 x 3
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7) (50.4x63.3x28.7)
+(31.7x63.3x28.7) +(31.7x63.3x28.7) x 3 x 3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
Unit
System(HP)
Model Combination unit
Independent unit
Product Charge kg
CF(Correction Factor) kg
Max. Connectable No. of Indoor Units
Net Weight kg
Dimensions mm
(WxHxD) inch
Connecting Pipes Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
3 Units
44 46 48
ARUV440LT2 ARUV460LT2 ARUV480LT2
ARUV160LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV160LT2 ARUV160LT2
ARUV140LT2 ARUV140LT2 ARUV160LT2
8x3 8x3 8x3
789
64(64) 64(64) 64(64)
285x3 285x3 285x3
(1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3
19.05 (3/4) 19.05 (3/4) 19.05 (3/4)
41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
ENGLISH
Installation Manual 13
Environment-friendly Alternative Refrigerant R410A
Select the Best Location
Select space for installing outdoor 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 outdoor unit in order to prevent any person or animal from accessing the
outdoor unit.
• If installation site is area of heavy snowfall, then the following directions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid bad condition when additionally performing
defrost operation.
1. Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the prod-
uct 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 outdoor 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.
14 Outdoor Unit
Installation Space
Installation Space
Individual Installation
■ Basic space required
A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into
account, a space of about 700 mm should be provided, the same as at the front.
700 mm or more (Control box is open/close type)
250 mm or more
Top discharge (open in principle)
Front inlet (open in principle)
Rear inlet (open in principle)
A
B
C
D
E
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
A
B
C
700 mm or more
(Control box is open/close type)
250 mm or more
150 mm from the wall
C
A
B
C
A
B
h
H
Front Side
Rear Side
C
A
B
C
Front Side
Rear Side
C
A
B
C
Front Side
Rear Side
C
A
B
C
B
A
Control Box
Front Side
Rear Side
B
A
Control Box
Front Side
Rear Side
Front Side
Rear Side
< Side view > < Top view >
< Side view > < Top view >
C
ED
A
B
250 mm or more
(350 mm or more at the coastal area.)
150 mm from the wall
B
A
B
A
h
H
Front Side
Rear Side
B
A
B
Front Side
Rear Side
B
A
B
Front Side
Rear Side
B
A
B
Front Side
Rear Side
< Side view > < Top view >
CAUTION
Wall height(H) must not exceed height of
the product. If the wall height is higher
than the whole height of product by (h),
Add (h) to
, .
CAUTION
Wall height(H) must not exceed height of
the product. If the wall height is higher
than the whole height of product by (h),
Add (h) to
, .
■ When inlet air enters from right and left sides of unit
ENGLISH
Installation Manual 15
Installation Space
A
B
C
A
B
C
A
B
C
45° or more
200 mm or more
250 mm or more
A
B
C
A
B
C
< Front view >
< Front view >
C
< Air guide >
587.6
372.5
390
125
723.5
700 mm or more
250 mm or more
Air guide
Air outlet guide
(procured at the side)
A
B
D
E
E
D
A
Front Side
B
Rear
Side
Door
■ When unit is surrounded by walls
700 mm or more (Control box is of a open/close type)
250 mm or more
A
B
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
A
B
B
B
Front Side
Rear Side
Front Side
Rear Side
A
B
B
B
■ When there is an obstruction above the unit
16 Outdoor Unit
Installation Space
Collective / Continuous installation
Space required for collective installation and continuous installation:When installing several units, leave
space between each block as shown below considering passage for air and people.
(Be opened)
900mm or more (control box is of a open/close type)
250 mm or more
A
B
= 1250mm or more
at the coastal area
or strong wind area
B
C
150 mm or more
D
Front Side
Rear Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
❈
D D D
DDD
ENGLISH
Installation Manual 17
Installation Space
Seasonal wind and cautions in winter
• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated
well.
• Get ready for seasonal wind or snow in winter even in other areas.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction
hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.
• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average
snowfall) if it is installed at the area with much snowfall.
• Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm, always remove snow for
operation.
1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the
product. (If width of the frame is wider than that of the product, snow may accumulate)
2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.
18 Outdoor Unit
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.
Lifting method
CAUTION
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than 20 kg.
• 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 Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outdoor 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.
A
40° or less
WARNING
ENGLISH
Installation Manual 19
Installation
Location of anchor bolt(To be applied to 1, 2 Units installation)
Installation
■ Individual installation
■ Collective installation
■ Installation foot(Location of anchor bolt)
10
383
10
383
700±2
900±2 900±2 900±2
UW1 UW1 UW1
383 383
700±2
900±2 900±2 900±2
UW1 UW1 UW1
10
383500±2
700±2
900±2900±210383
UY2 UW1 UW1
10
383500±2
700±2
900±2900±2
10 10
383 383
900±2 900±2 900±2
UW1 UW1 UW1
10 10
10 10 10
150
150
383
UY2 UW1 UW1
383533
533
500±2 900±2900±2
383
UY2 UW1 UW1
(UY2) (UW1)
20 Outdoor Unit
Installation
Foundation for Installation
• Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.
• Use the H-beam support as a base support
• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation
part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad
shall be more than 200mm).
Foundation bolt executing method
200
Nut
75
75
200
Spring washer
Frame
Anti-vibration
materials
Four bolt are
required
3 thread ridges
H-Beam
Concrete
base
100
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 outdoor unit during operation) and paths of the pipe and wiring when making a base support.
• Don't use a tube or pipe for water drain in the base pan and perform water drain processing by
using the drain path. Water drain may not be done due to freezing of a tube or pipe.
Side view
Water
Drain
Path
Rear view
ENGLISH
Installation Manual 21
Installation
Preparation of Piping
1) Cut the pipes 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 pipes a little longer than measured distance.
■ Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
■ Completely remove all burrs from the cut cross section
of pipe/tube.
■ Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Flaring work
■ 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
■ Compare the flared work with figure below.
■ 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 =
22 Outdoor Unit
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
Shutoff
valve size
Ø6.4
Ø9.5
Ø12.7
Ø15.9
Ø22.2
Ø25.4
13.5-16.5
18-22
14-17
33-39
50-60
62-75
23-27
13.5-16.5
5.4-6.6
Hexagonal
wrench 4mm
Hexagonal
wrench 6mm
Hexagonal
wrench 10mm
8.1-9.9
27-33 36-44
-
11.5-13.9
22-28-
Tightening torque N-m(Turn clockwise to close)
Shaft(valve body)
Gas line piping attached to unit
Cap(Valve lid) Service port Flare nut
90°
±2
45°
±2
A
R=0.4~0.8
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
ENGLISH
Installation Manual 23
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.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
HEAT INSULATION
24 Outdoor Unit
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.
Pipe joint (auxiliary parts): Securely perform brazing with
a nitrogen blow into the service valve port.(Releasing
pressure : 0.02 MPa or less)
Flare nut: Loose or tighten flare nut by using the wrench
with both ends. Coat the flare connection part with oil for
the compressor.
Cap: Remove caps and operate valve, etc. After operation, always reattach caps (tightening torque of valve
cap: 25Nm (250kg-cm) or more). (Don't remove the
internal part of the port)
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).
Liquid pipe
Gas pipe
Elbow joint (field supply)
Cautions in pipe connection/valve operation
Open status when both the pipe and
the valve are in a straight line.
Cut both the pipe and the valve with a
cutter to suit the length
(Don't cut the length of less than 70mm)
CLOSE OPEN
Elbow
Ball Valve(Gas Pipe)
Ball Valve(Liquid Pipe)
ENGLISH
Installation Manual 25
Refrigerant piping installation
Connection of High/Low Pressure Common pipe
1. For the High/Low Pressure Common pipe, connect both Master Outdoor Unit and Slave (1, 2) Outdoor Unit to the pipe
(field supply) by using elbows (field supply)
2. For cutting the pipe, connect the High/Low Pressure Common pipe after removing burrs, dusts and foreign materials
within the pipe. Otherwise, the product may not operate due to sludge within the pipe.
When connecting the pipes from the front of
the outdoor unit, remove part
.
When connecting the pipes from the side of the
outdoor unit, remove part (the whole "Knock
out" part).
Slave
Outdoor Unit
Master
Outdoor Unit
2 outdoor units 3 outdoor units
WARNING
After installing the pipe, clog the pipe excavation inlet of the front panel and the side panel
(Wire may be damaged due to entry of rats, animals, etc).
CAUTION
When you use the Hi/Low pressure common pipe to
connect 2~3 ODU, please remove the factory supplied
rubber cap as shown in the figure.
When installing just one ODU, please make
sure to remove the factory supplied rubber
cap and replace it by brazing the copper
cap supplied with manual in ODU.
If you do not replace the factory supplied
rubber cap, there might be refrigerant leakage.
Gas valve
Slave2
Outdoor
Unit
Slave1
Outdoor
Unit
Master
Outdoor Unit
(Front)
(Side)
Knock out
Communication Line Hole
Power Cable Hole
Pipe Hole
Outdoor unit
joint pipe (used
for more than 2
units installation)
Service
port cap
Cap
Liquid
valve
Cut the pipe with a
cutter to suit the length.
(Don't cut less than 70mm)
Gas valve
Gas valve
70mm
26 Outdoor Unit
Refrigerant piping installation
2 outdoor units
Connection of Outdoor units
3 Outdoor Units
Model
Connection of gas pipe Connection of liquid pipe
Blow nitrogen
Don't cut the pipe less
than 70mm
Ø 19.05
ARCNN20
Ø 22.2
Ø15.88
OD19.05
Model
Connection of gas pipe
Don't cut the pipe less
than 70mm
Ø 19.05
Ø15.88
OD19.05
ARCNN20
Connection of liquid pipe
Ø 9.52
Ø 12.7
Ø 28.58
Ø 22.2
Ø9.52
OD12.7
Ø 28.58
Ø19.05
OD28.58
Ø22.2
Ø 28.58
Ø 28.58
Ø19.05
Ø22.2
Sub1 outdoor unit
Ø 12.7
while brazing
Main outdoor
gas pipe
OD28.58
OD34.9
Blow nitrogen
while brazing
Sub1 outdoor
gas pipe
Ø 19.05
Ø 15.88
OD19.05
Ø22.2
Ø 31.8
Ø 28.58
Main pipe
Ø38.1
OD34.9
Ø38.1
Ø 12.7
Ø 34.9
Ø 31.8
Ø 28.58
Ø 34.9
Model
ARCNN30
Main outdoor
liquid pipe
Ø 12.7
Ø 9.52
Ø 12.7
OD12.7
Ø9.52
Ø22.2
OD19.05
Connection of gas pipe
Don't cut the pipe less
than 70mm
Ø 34.9
Ø 28.58
Ø19.05
Connection of liquid pipe
Main outdoor unit
Ø 12.7
Ø 12.7
Ø 19.05
Ø 15.88
Ø 19.05 Ø 12.7
Ø 15.88
Main pipe
Ø 28.58
OD28.58
Ø22.2
Ø9.52
OD12.7
Blow nitrogen
while brazing
Main outdoor
gas pipe
Main pipe
Ø 22.2 Ø 19.05
Main pipe
Ø 38.1
Ø 34.9
Ø 41.3
Y branch
A
To outdoor unit
A
To branch piping or indoor unit
B
B
Viewed from point A
in direction of arrow
Within +/- 10°
Facing
downwards
Facing
upwards
Within ± 3° Within ± 3°
ENGLISH
Installation Manual 27
Refrigerant piping installation
To Outdoor Unit
Sealed Piping
A
A
B
A
B
1. Use the following materials for refrigerant piping.
• Material: Seamless phosphorous deoxidized copper pipe
• Wall thickness : Comply with the relevant local and national regulations for the designed pressure
3.8MPa. We recommend the following table as the minimum wall thickness.
2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. Always use the branch piping set shown below, which are sold separately.
6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut
the connecting section and then use an adapter for connecting different diameters to connect the piping.
7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and
piping diameter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
8. A second branch cannot be made after a header. (These are shown by .)
9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always
properly charge the unit. When servicing, always check the notes concerning both the piping length and
the amount of additional refrigerant.
10. Never perform a pump down. This will not only damage the compressor but also deteriorate the
performance.
11. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
Caution
ARBLN01621 ARBLN03321 ARBL054 ARBL057 ARBL1010
ARBLN07121 ARBLN14521 ARBL104 ARBL107 ARBL2010
Y branch
Header
4 branch 7 branch 10 branch
0.99
22.2
1.1
31.8
1.21
34.9
1.35
38.1
1.43
41.3
0.99
28.58
0.99
25.4
0.99
19.05
0.99
15.88
0.8
12.7
0.8
9.52
0.8
6.35
Minimum
thickness [mm]
Outer diameter
[mm]
28 Outdoor Unit
Refrigerant piping installation
WARNING
When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the
installation pipe drawing.
= Product length + ∑ Max.10 (distance between Outdoor Units)
Pipe length between Outdoor Units
(Gas pipe, Liquid pipe, High/Low Pressure Common pipe)
12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.
13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.
14. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film
can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant
oil.
Unit: mm
Product length
Distance between Outdoor Units
Product length
Distance between Outdoor Units
Max. 10
Max. 10
ENGLISH
Installation Manual 29
Refrigerant piping installation
◆ Y branch method
Refrigerant piping system
1 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
l
40m (90 m : Conditional application)
H 100m
L150m (200 m : Conditional application)
Master
Master
Slave
Slave
10m or
less
l 40m (90 m : Conditional application)
H 100m
L150m (200 m : Conditional application)
Piping length from outdoor branch to outdoor unit ≤10m, equivalent length:max 13m
(for 18HP or more)
Additional Application
To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø6.35 → Ø 9.52 → Ø 12.7 → Ø 15.88 → Ø 19.05 → Ø 22.2 → Ø 25.4*, Ø 28.58 → Ø 31.8*, Ø 34.9 → Ø
38.1*
* : It is not necessary to size up.
2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m
2 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch (Y branch)
: Indoor Units
: Downward Indoor Unit
: Connection branch pipe
between Outdoor units:
ARCNN20
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