LG ARUB160LT2 INSTALLATION INSTRUCTIONS
P/NO : MFL46912302
www.lg.com
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.
TYPE :
ENGLISH
ITALIANO
ESPAÑOL FRANÇAIS
DEUTSCH
PORTUGUESE
2 Outdoor Unit
ARUB Series Outdoor Unit Installation Manual
TABLE OF CONTENTS
Safety Precautions....................................................................................................................3
Installation Process ..................................................................................................................7
Outdoor Unit Information .........................................................................................................9
Select the Best Location.........................................................................................................10
Installation Space....................................................................................................................12
Lifting method .........................................................................................................................16
Installation ...............................................................................................................................17
Refrigerant piping installation ...............................................................................................22
Electrical Wiring ......................................................................................................................43
HR unit PCB.............................................................................................................................52
Master Unit and Slaver Unit PCB...........................................................................................63
Test Run...................................................................................................................................70
Caution For Refrigerant Leak.................................................................................................91
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.
Don't use the existing manifold gage for R22 refrigerant.
•
Use the manifold gage for high pressure (R410A) as possible
as for stable refrigerant filling.
Don't mix and use the R22 pipe and the installation
appliances that were used until now
• Mixing the oil of R22 and R410A may cause
failure of the unit due to hydrolysis.
Do not open the inlet grill 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.
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.
■ 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.
Take care so that children should not randomly operate the wire remote control for play.
• Frequent conversion to cold or heat mode may cause failure of the unit.
When the product is soaked (flooded or
submerged), contact an Authorized Service Center.
• There is risk of fire or electric shock.
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.
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.
ENGLISH
Installation Manual 5
Safety Precautions
■ Installation
Always check for gas (refrigerant) leakage after instal-
lation 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.
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.
■ 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, and 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.
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.
Safety Precautions
6 Outdoor Unit
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.
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.(In case of outdoor
temperature below 10°C)
• 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.
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 outdoor units. Autoaddressing 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.
Avoid a place where rain may enter since the HR unit
is for indoor
• There is risk of property damage, failure of product or electric shock.
Install the HR unit at a place in which it is not affected
by operation mode changing noise.
• Installation within cell such as meeting room etc, may disturb business due to noise.
Installation Process
Installation Process
The foundation must be level
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed
for service
Installation of outdoor unit
In the final check for 24hours at 3.80 MPa(38.7 kgf/cm2) there must be no drop in pressure.
Airtight Test
Multiple core cable must not be used.
(suitable cable shouldbe 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 and HR 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
Refer to automatic addressing for Indoor units and pipe detection.
Preheat the crank case with the electrical heater for more than 6 hours.
(In case of the outdoor temperature below 10°C)
Automatic addressing for Indoor
units and pipe detection
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Test run adjustment
Transfer to customer with explanation
Explain the proper use of the system as clearly as possible to your customer and make
sure all relevant documentations are in order.
CAUTION:
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.
Make sure additional charge the refrigerant before automatic addressing of indoor and pipe searching.
ENGLISH
Installation Manual 7
8 Outdoor Unit
Installation Process
Sea wind Sea wind
Installation guide at the seaside
CAUTION
1.
Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
Windbreak
Sea wind
3) Select a well-drained place.
1.
If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
• It should be strong enough like concrete to prevent
the sea wind from the sea.
• The height and width should be more than 150% of
the outdoor unit.
• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
Outdoor Units Information
ENGLISH
Installation Manual 9
Outdoor Units Information
Power Supply: Outdoor Unit (3Ø, 380~415V, 50 Hz/ 3Ø, 380V, 60Hz)
■ Heat Recovery System
Unit
Hp(Equivalent Hp)
Model Name
Combination Unit
Refrigerant kg
CF(Correction Factor) kg
No. of Max. Connectable Indoor units
Net Weight kg
Dimensions (W*H*D) mm
inch
Connecting Pipes
Liquid [mm(inch)]
Suction Gas[mm(inch)]
Discharge Gas[mm(inch)]
1 Unit 2 Units
8101214161820
ARUB80LT2 ARUB100LT2 ARUB120LT2 ARUB140LT2 ARUB160LT2 ARUB180LT2 ARUB200LT2
ARUB80LT2 ARUB100LT2 ARUB120LT2 ARUB140LT2 ARUB160LT2 ARUB100LT2 ARUB120LT2
ARUB80LT2 ARUB80LT2
8 8 8 8 8 8+8 8+8
-1 0 1 2 3 -1 0
13(20) 16(25) 19(30) 23(35) 26(40) 29(36) 32(40)
240 285 285 285 285 240+285 240+285
1280x1607x730 1280x1607x730 1280x1607x730 1280x1607x730 1280x1607x730 (1280x1607x730)x2 (1280x1607x730)x2
50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 50.4x63.3x28.7 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2
9.52 (3/8) 9.52 (3/8) 12.7 (1/2) 12.7 (1/2) 12.7 (1/2) 15.88 (5/8) 15.88 (5/8)
19.05 (3/4) 22.2 (7/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
15.88 (5/8) 19.05 (3/4) 19.05(3/4) 22.2 (7/8) 22.2 (7/8) 22.2 (7/8) 22.2 (7/8)
Unit
Hp(Equivalent Hp)
Model Name
Combination Unit
Refrigerant kg
CF(Correction Factor) kg
No. of Max. Connectable Indoor units
Net Weight kg
Dimensions (W*H*D) mm
inch
Connecting Pipes
Liquid [mm(inch)]
Suction Gas[mm(inch)]
Discharge Gas[mm(inch)]
2 Units 3 Units
22 24 26 28 30 32 34
ARUB220LT2 ARUB240LT2 ARUB260LT2 ARUB280LT2 ARUB300LT2 ARUB320LT2 ARUB340LT2
ARUB140LT2 ARUB160LT2 ARUB140LT2 ARUB140LT2 ARUB160LT2 ARUB160LT2 ARUB140LT2
ARUB80LT2 ARUB80LT2 ARUB120LT2 ARUB140LT2 ARUB140LT2 ARUB160LT2 ARUB120LT2
ARUB80LT2
8+8 8+8 8+8 8+8 8+8 8+8 8+8+8
12345 62
35(44) 39(48) 42(52) 45(56) 49(60) 52(64) 55(64)
240+285 240+285 285x2 285x2 285x2 285x2 240+285x2
(1280x1607x730)x2
(1280x1607x730)x2
(1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730)x2 (1280x1607x730)x3
(50.4x63.3x28.7)x2
(50.4x63.3x28.7)x2
(50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x2 (50.4x63.3x28.7)x3
15.88 (5/8) 15.88 (5/8) 19.05 (3/4) 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) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8) 28.58 (1 1/8)
Unit
Hp(Equivalent Hp)
Model Name
Combination Unit
Refrigerant kg
CF(Correction Factor) kg
No. of Max. Connectable Indoor units
Net Weight kg
Dimensions (W*H*D) mm
inch
Connecting Pipes
Liquid [mm(inch)]
Suction Gas[mm(inch)]
Discharge Gas[mm(inch)]
3 Units
36 38 40 42 44 46 48
ARUB360LT2 ARUB380LT2 ARUB400LT2 ARUB420LT2 ARUB440LT2 ARUB460LT2 ARUB480LT2
ARUB140LT2 ARUB160LT2 ARUB160LT2 ARUB160LT2 ARUB160LT2 ARUB160LT2 ARUB160LT2
ARUB140LT2 ARUB140LT2 ARUB160LT2 ARUB160LT2 ARUB140LT2 ARUB160LT2 ARUB160LT2
ARUB80LT2 ARUB80LT2 ARUB80LT2 ARUB100LT2 ARUB140LT2 ARUB140LT2 ARUB160LT2
8+8+8 8+8+8 8+8+8 8+8+8 8+8+8 8+8+8 8+8+8
34567 89
58(64) 61(64) 64(64) 64(64) 64(64) 64(64) 64(64)
240+285x2 240+285x2 240+285x2 285x3 285x3 285x3 285x3
(1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3 (1280x1607x730)x3
(50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)x3 (50.4x63.3x28.7)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) 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) 41.3 (1 5/8) 41.3 (1 5/8) 41.3 (1 5/8)
28.58 (1 1/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8) 34.9 (1 3/8)
• 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 headquarter guidance.
3) Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input
4) The Number of ( ) means the number of max. connectable indoor units, when the connected capacity of indoor units is in the
table above.
Outdoor Number Connection Capacity
Single outdoor units 200%
Double outdoor units 160%
Triple outdoor units 130%
10 Outdoor Unit
Select the Best Location
Select the Best Location
■ Select installation location of the outdoor unit suitable for following conditions
Select space for installing outdoor unit, which will meet the following conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying the 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 the system 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.
• Don't operate heating mode when the outdoor air temperature is -20°C or lower.
• 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
product at a place with a high humidity in winter (near 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 ventilation is good.
It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.
(5) Location where water gathers since the floor is not even.
ENGLISH
Installation Manual 11
Installation Space
n Select installation location of the HR unit suitable for following conditions
• Avoid a place where rain may enter since the HR unit is for indoor.
• Sufficient service space must be obtained.
• Refrigerant pipe must not exceed limited length.
• Avoid a place subject to a strong radiation heat from other heat source.
• Avoid a place where oil spattering, vapor spray or high frequency electric noise is expected.
• Install the unit at a place in which it is not affected by operation noise. (Installation within cell such as meeting
room etc. may disturb business due to noise.)
• Place where refrigerant piping, drain piping and electrical wiring works are easy.
100 more
(Serviceing space)
100 more
(Serviceing space)
:
1. Be sure to install the inspection door at the control box side.
2. If reducers are used, servicing space must be increased equal to reducer's dimension.
NOTICE
(Unit: mm)
No. Part Name
Description
PRHR040 PRHR030 PRHR020
1 Low pressure Gas pipe connection port Ø28.58 Brazing connection Ø28.58 Brazing connection Ø22.2 Brazing connection
2 High pressure Gas pipe connection port Ø22.2 Brazing connection Ø22.2 Brazing connection Ø19.05 Brazing connection
3 Liquid pipe connection port
Ø12.7 Brazing connection
(Before 2011.4.1 Product)
Ø15.88 Brazing connection
(After 2011.4.1 Product)
Ø12.7 Brazing connection Ø9.52 Brazing connection
4 Indoor unit Gas pipe connection port Ø15.88 Brazing connection Ø15.88 Brazing connection Ø15.88 Brazing connection
5 Indoor unit Liquid pipe connection port Ø9.52 Brazing connection Ø9.52 Brazing connection Ø9.52 Brazing connection
6 Control box - - -
7 Hanger metal M10 or M8 M10 or M8 M10 or M8
(Unit: mm)
481
7
345
300more
1
(Servicing space)
(NOTICE 2)
100 more
100 more
(Serviceing space)
(Serviceing space)
300more
(Servicing space)
2
3
100 more
100 more
(Serviceing space)
(Serviceing space)
450
450
218
Inspection door(NOTICE 1)
(servicing space)
453(174)
(174)
300more
(Servicing space)
182
6
128
(NOTICE 2)
124
41961 (137)
450more
(Servicing space)
54
30 60
12 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.
■ When inlet air enters from right and left sides of unit
700 mm or more (Control box is of a 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
A
B
Control Box
Front Side
Rear Side
A
B
C
700 mm or more
(Control box is of a 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
A
B
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
(350mm 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 , .
ENGLISH
Installation Manual 13
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
< 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 there is an obstruction above the unit
■ 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
Front Side
Rear Side
A
B
B
B
14 Outdoor Unit
Installation Space
Collective / Continuous installation
Space required for collective installation and continuous installation:When installing several units, leave
the space between each block as shown below considering passage for air and people.
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
(Be opened)
900mm or more (control box is of a open/close type)
250 mm or more
A
B
C
150 mm or more
D
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
D D D
DDD
= 1250mm or more at the
coastal area
B
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
Front Side
Rear Side
ENGLISH
Installation Manual 15
Installation Space
Cautions in winter especially for seasonal wind
• Sufficient measures are required at 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 area.
• 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 to the seasonal wind.
16 Outdoor Unit
Lifting Method
Lifting method
• When carrying the unit suspended, 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 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 of it.
• 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 17
Installation
Installation
Location of anchor bolt
■ Individual installation
■ Example of 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 10
383 383
900±2 900±2 900±2
UW1 UW1 UW1
10 10
150
533
900mm
18 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 be done due to freezing of a tube or pipe.
Side view
Water
Drain
Path
Rear view
ENGLISH
Installation Manual 19
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.
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 =
Pipe (Inch) " A " (mm)
Gas Liquid Gas
Liquid
<5.6(19,100) 1/2" 1/4" 1.6~1.8 1.1~1.3
<16.0(54,600) 5/8" 3/8" 1.6~1.8 1.5~1.7
<22.4(76,400) 3/4" 3/8" 1.9~2.1 1.5~1.7
Indoor unit
[kW(Btu/h]
20 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.
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.
pipe size tightenig torque A flare shape
mm N.m(kgf.cm) mm
Ø9.52 32.7-39.9(327~399) 12.8-13.2
Ø12.7 49.5-60.3(495~603) 16.2-16.6
Ø15.88 61.8-75.4(618~754) 19.3-19.7
Tightening torque
Union
Outside diameter Torque
mm inch N.m(kgf•cm)
Ø6.35 1/4 18~25(180~250)
Ø9.52 3/8 34~42(340~420)
Ø12.7 1/2 55~66(550~660)
Ø15.88 5/8 63~82(630~820)
Ø19.05 3/4 99~121(990~1210)
Flare shape and flare nut tightening torque
Opening shutoff valve
Closing shutoff valve
±2
90°
45°
±2
A
R=0.4~0.8
ENGLISH
Installation Manual 21
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
"KS Standard 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... Adiabatic
glass wool with thickness 10 to 20mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick
piping) and drain piping, add further 10mm to 30mm thickness material.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
Heat insulation
22 Outdoor Unit
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 (R-410A) from the 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.
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: 14 N.m (140kgf.cm) or more).
Liquid pipe
Low Pressure Gas pipe
High Pressure Gas pipe
Elbow joint
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)
Refrigerant piping installation
Flare Valve
(High Pressure Gas pipe)
(Liquid pipe)
Ball Valve
1
Ball Valve
(Low Pressure Gas pipe)
ENGLISH
Installation Manual 23
Refrigerant piping installation
When connecting the pipes from the front of
the outdoor unit, remove part
and part .
When connecting the pipes from the side of the
outdoor unit, remove part (the whole "Knock
out" part).
Knock out
Communication Line Hole
Power Cable Hole
Pipe Hole
(Front) (Side)
3
WARNING
After installing the pipe, clog the pipe excavation inlet of the front panel and the side panel
(Wire may be damaged due to entering 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
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
24 Outdoor Unit
Refrigerant piping installation
2 outdoor units
3 outdoor units
Connection of Outdoor Units
Model
ARCNB20
Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe
Ø34.9
Ø31.8
Ø28.58
OD34.9
Ø38.1
Model
ARCNB20
ARCNB30
Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe
Ø34.9
Ø31.8
Ø28.58
Ø38.1
Ø41.3
Ø38.1
Ø34.9
Ø28.58
Ø19.05
OD28.58
Ø22.2
Ø28.58
Ø19.05OD34.9 Ø15.88
OD28.58
Ø22.2
Ø28.58
Ø19.05
OD28.58
Ø22.2
Ø28.58
Ø28.58
Ø22.2
Ø15.88
OD19.05
Ø22.2
OD19.05
Ø34.9
Ø28.58
Ø19.05
Ø19.05
Ø12.7
Ø12.7
Ø19.05
Ø19.05
Ø15.88
Ø19.05
Ø15.88
Ø22.2
Ø22.2
OD19.05
OD19.05
OD12.7
Ø9.52
Ø12.7
OD12.7Ø22.2
Ø12.7
Ø12.7
OD12.7
Ø9.52
Ø9.52
Ø12.7
Ø12.7
Ø19.05
Ø 9.52
Ø9.52
Ø15.88
Ø12.7
Ø22.2
Ø22.2
Ø34.9
Ø28.58
Ø28.58
Ø31.8
Ø28.58
OD22.2
OD22.2
OD22.2
Ø19.05
Ø19.05
Ø22.2
Ø15.88
Ø22.2
Ø15.88
Ø19.05
Ø15.88
Ø22.2
Ø19.05
Ø22.2
Ø19.05
Ø22.2
Ø28.58
Ø15.88
Ø15.88
Ø19.05
Ø22.2
ENGLISH
Installation Manual 25
Refrigerant piping installation
Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant Pipe
3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pressure gas pipe and
high pressure gas pipe depending on status of refrigerant passing through the pipe.
You must connect 3 pipes from outdoor unit to HR unit.
For connection between indoor unit and HR unit, you must connect both liquid pipe and gas pipe from the HR
unit to the indoor unit. In this case, connect them to the indoor unit starting from No.1 connection port of the HR
unit (the port number is displayed on ports of the HR unit). Use auxiliary flare as annexed parts in connection to
the indoor unit.
CAUTION:
Whenever connecting the indoor units with the HR unit, install the indoor units in numerical order from No.1.
Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X), No.1, 3, 4 (X), No.2, 3, 4 (X).
Installation procedure for HR unit
Hanger metal
Flat washer
Hanging bolt
1. Using an insert-hole-in- anchor, hang the hanging bolt.
2. Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown
in the figure in the bottom, and fit the main unit to hang on the hanger metal.
3. After checking with a level that the unit is level, tighten the hexagon nut.
* The tilt of the unit should be within ±5° in front/back and left/right.
4. This unit should be installed suspended from ceiling and side A should always be
facing up.
5. Insulate not used pipes completely as shown in the figure.
Six-sided Nut
(M10 or M8)
Hanger metal
Hanger metal
Flat washer
Flat washer
(M10)
Hanging bolt
Hanging bolt
(M10 or M8)
A
Insulation
Gas pipe
HR Unit
2
1
Liquid pipe
4
3
Gas pipe
Liquid pipe
Liquid pipe
Low pressure
Gas pipe
High pressure
Gas pipe
Refrigerant piping installation
26 Outdoor Unit
Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types
by the number of connectable indoor units.
Ex) Installation of 6 indoor units
Consists of HR unit for 4 rooms and HR unit for 2 rooms.
Type of HR Unit
WARNING
• 1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW
(48kBtu/hr) for max installation).
• The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW
(160kBtu/hr). In case of installation of four indoor units of 14.1kW (48kBtu/hr), use two PRHR020's
rather than one PRHR040.
Gas pipe Ø15.88
Liquid pipe Ø9.52
Brazing Type
1
2
3
4
Remove caps on
The brazing part.
Liquid pipe
Low pressure gas pipe
High pressure gas pipe
Joint Method of HR Unit (Big Duct : URNU76GB8-, URNU96GB8-)
Joint Method is required when B5/B8 chassis is installed. In Joint Method, two neighboring outlets of
one HR unit are linked by Y branch pipe and connected to one indoor unit.
1st HR Unit 2nd HR Unit
1 2 3 4
B5
(96k) (28k)
BG
1 2 3 4
B5
(76k)(21k)
BH
(Unit: mm)
HR unit PRHR020 PRHR030 PRHR040
Low pressure gas pipe Ø22.2 Ø28.58 Ø28.58
High pressure gas pipe Ø19.05 Ø22.2 Ø22.2
Liquid pipe Ø9.52 Ø12.7
Ø12.7(Before 2011.4.1 Product)
Ø15.88(After 2011.4.1 Product)
4
2
1
PRHR030(3 rooms)PRHR020(2 rooms) PRHR040(4 rooms)
3
2
1
3
2
1
Refrigerant piping installation
ENGLISH
Installation Manual 27
[ Reducers for indoor unit and HR unit ]
(Unit: mm)
Models
Indoor unit
reducer
Liquid pipe
Ø6.35OD9.52
High pressure
Gas pipe
Low pressure
OD15.88 Ø
12.7
HR unit
reducer
PRHR020
PRHR030/
PRHR040
(Before
2011.4.1
Product)
PRHR040
(After
2011.4.1
Product)
Ø6.35OD9.52
OD12.7 Ø9.52
OD15.88 Ø12.7 Ø9.52
OD19.05 Ø15.88 Ø12.7
OD12.7 Ø9.52
OD22.2 Ø19.05 Ø15.88
OD15.88 Ø12.7
OD22.2 Ø19.05 Ø15.88
OD15.88 Ø12.7
OD22.2 Ø19.05 Ø15.88
OD15.88 Ø12.7
OD28.58 Ø22.2 Ø19.05
OD19.05 Ø15.88
OD28.58 Ø22.2 Ø19.05
OD19.05 Ø15.88
28 Outdoor Unit
Refrigerant piping installation
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]
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. The system 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 pipe length and the
amount of additional refrigerant.
9. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
10. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling perfor-
mance, drip of condensate and other such problems.
11. 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.
12. 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 compressors and flux can harm the copper piping or refrigerant oil.
13. Diameter of the refrigerant pipe from the HR unit to the indoor unit is determined by capacity of the
indoor unit. The pipe port is installed to suit a large capacity of the indoor unit for the connection flare of
the HR unit. It is sufficient to cut, connect and install the subsidiary flare to suit the pipe of the indoor unit
connected.
14. Take care so that there is no thermal damage on the service valves of the outdoor unit.
(Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it.
Caution
ARBLB01621 ARBLB03321
ARBLB07121 ARBLB14521
Y branch
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