FRANÇAIS
ESPAÑOL
ENGLISH
INSTALLATION MANUAL
AIR
CONDITIONER
P/NO : MFL63748902
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.
ARWB Series
www.lg.com
Copyright © 2010 - 2018 LG Electronics Inc. All Rights Reserved.
ARWB Series Outside unit Installation Manual
TABLE OF CONTENTS
Safety Precautions .........................................................................................................3
Installation Process .......................................................................................................7
Outside units Information..............................................................................................8
Environment-friendly Alternative Refrigerant R410A ..............................................10
Select the Best Location..............................................................................................10
Installation space ........................................................................................................12
Water control ...............................................................................................................14
Lifting method ..............................................................................................................16
Installation ....................................................................................................................17
Refrigerant piping installation ....................................................................................21
Device protection unit..................................................................................................31
Refrigerant piping system ..........................................................................................33
Y branch pipe and header branch pipe type .............................................................42
Leakage test and vacuum ...........................................................................................43
Electrical Wiring ...........................................................................................................45
HR Unit PCB..................................................................................................................58
Test Run ........................................................................................................................75
Cooling tower applied method ...................................................................................84
Caution For Refrigerant Leak......................................................................................85
Water Solenoid Valve Control .....................................................................................87
Variable Water Flow Control KIT(Accessory) ............................................................88
2 Outside Unit
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
n Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
ENGLISH
Installation Manual 3
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.
• Do not install the unit outdoor.
- Otherwise it may cause fire, electric shock and trouble.
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
• 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.
• Ventilate before operating air conditioner when gas leaked out.
- It may cause explosion, fire, and burn.
Safety Precautions
4 Outside Unit
• Securely install the cover of control box and the panel.
- If the cover and panel are not installed securely, dust or water may enter the outside unit and fire or electric shock
may result.
• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from
exceeding the safety limit when the refrigerant leaks.
- Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the
refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.
• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and
Do not use Flammable gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
Operation
• Do not 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 the product is soaked (flooded or submerged), contact an Authorized Service Center.
- There is risk of fire or electric shock.
• Be cautious not to touch the sharp edges when installing.
- It may cause injury.
• Take care to ensure that nobody could step on or fall onto the outside unit.
- This could result in personal injury and product damage.
• Do not open the inlet grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so
equipped.)
- There is risk of physical injury, electric shock, or product failure.
Installation
• Always check for gas (refrigerant) leakage after installation or repair of product.
- Low refrigerant levels may cause failure of product.
• Do not install the product where the noise or hot air from the outside unit could damage the neighborhoods.
- It may cause a problem for your neighbors.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
• Use power cables of sufficient current carrying capacity and rating.
- Cables that are too small may leak, generate heat, and cause a fire.
• Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air condition-
er, not a precision refrigeration system.
- There is risk of damage or loss of property.
Safety Precautions
ENGLISH
Installation Manual 5
• 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 equip-
ment 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.
• Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than 20 kg.
- Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so may cut your fingers.
- When transporting the outside unit, suspending it at the specified positions on the unit base. Also support the outside
unit at four points so that it cannot slip sideways.
• 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 plas-
tic 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.
• 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.
6 Outside Unit
Safety Precautions
When wiring:
Electrical shock can cause severe personal injury or death. Only a qualified,
experienced electrician should attempt to wire this system.
• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
•
•
Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
The choice of materials and installations must comply with the applicable local/national or international
standards.
When transporting:
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and
bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on
the air conditioner can cut your finger.
When installing...
... in a wall: Make sure the wall is strong enough to hold the unit's weight.
It may be necessary to construct a strong wood or metal frame to provide added support.
... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause
dripping and water damage to wall and floors.
... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,
level foundation for the outdoor unit. This prevents water damage and abnormal vibration.
... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is
higher than drifting snow. Provide snow vents.
When connecting refrigerant tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Check carefully for leaks before starting the test run.
When servicing
• Turn the power OFF at the main power box(mains) before opening the unit to check or repair
electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have
been left inside the unit being serviced.
WARNING
WARNING
•
• Refer to local code for all wiring size.
Installation or repairs made by unqualified persons can result in hazards to you and others.
Installation of all field wiring and components MUST conform with local building codes or, in the absence of local
codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or
Canadian Electrical code and National Building Code of Canada.
• The information contained in the manual is intended for use by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property
damage, personal injury and/or death.
Installation Process
ENGLISH
Installation Manual 7
Installation Process
The foundation must be level even
Outside unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outside 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 outside, 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 pres-
sure 3.8MPa.
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refriger-
ant is charged in its gaseous state, its composition changes and the system will not work properly.)
Outside units Information
Power Supply: Outside Unit (3Ø, 208/230V, 60Hz)
n Heat Recovery
• Ratio of the running Indoor Units to the Outside: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each indoor unit capacity.
n Combination Ration(Minimum : 50%)
Notes:
* We can guarantee the operation only within 130% Combination.
System Capacity HP(Ton)
Model Name
Product Refrigerant Charge lb(kg)
CF(Correction Factor) lb(kg)
Maximum Connectable No. of Indoor Units
Net Weight lb
kg
Dimension(W×H×D) inch
mm
Refrigerant Liquid inch(mm)
Connecting Low Pressure Gas inch(mm)
Pipes High Pressure Gas inch(mm)
Water Inlet mm
Connecting Outlet mm
Pipes Drain Outlet inch(mm)
8(6.5) 16(12.5) 24(19.0)
ARWB072BA2 ARWB144BA2 ARWB216BA2
16.1(7.3) 19.4(8.8) 19.4(8.8) + 16.1(7.3)
3.3(1.5) 6.6(3.0) 9.9(4.5)
16 32 49
(339.5)×1 (491.6)×1 (491.6)×1 + (339.5)×1
(154)×1 (223)×1 (223)×1+(154)×1
(30-13/32×44-3/32×21-1/2)×1 (30-13/32×44-3/32×21-1/2)×1 (30-13/32×44-3/32×21-1/2)×2
(772×1,120×547)×1 (772×1,120×547)×1 (772×1,120×547)×2
3/8(9.52) 1/2(12.7) 3/4(19.05)
7/8(22.2) 1-1/8(28.58) 1-3/8(34.9)
3/4(19.05) 7/8(22.2) 1-1/8(28.58)
PT32A (Female) PT40A (Female) PT40A + PT32A (Female)
PT32A (Female) PT40A (Female) PT40A + PT32A (Female)
3/4(22) (Female) 3/4(22) (Female) 3/4(22) (Female)
Outside units Information
8 Outside Unit
Number of outside units
Connection Capacity
3Ø, 208/230V, 60Hz 3Ø, 480V, 60Hz
Single outside unit 130% 130%
Double outside units 130% 130%
Triple outside units 130% 130%
Power Supply: Outside Unit (3Ø, 460V, 60Hz)
n Heat Recovery
System Capacity HP(Ton)
Model Name
Product Refrigerant Charge lb(kg)
CF(Correction Factor) lb(kg)
Maximum Connectable No. of Indoor Units
Net Weight lb
kg
Dimension(W×H×D) inch
mm
Refrigerant Liquid inch(mm)
Connecting Low Pressure Gas inch(mm)
Pipes High Pressure Gas inch(mm)
Water Inlet mm
Connecting Outlet mm
Pipes Drain Outlet inch(mm)
32(25.5) 40(32.0) 48(38.0)
ARWB288BA2 ARWB360BA2 ARWB432BA2
19.4(8.8) + 19.4(8.8)
19.4(8.8) + 19.4(8.8) + 16.1(7.3) 19.4(8.8) + 19.4(8 8) + 19.4(8.8)
13.2(6.0) 16.5(7.5) 19.8
64 64 64
(491.6)×2 (491.6)×2+(339.5)×1 (491.6)×3
(223)×2 (223)×2 + (154)×1 (223)×3
(30-13/32×44-3/32×21-1/2)×2 (30-13/32×44-3/32×21-1/2)×3 (30-13/32×44-3/32×21-1/2)×3
(772×1,120×547)×2 (772×1,120×547)×3 (772×1,120×547)×3
3/4(19.05) 3/4(19.05) 3/4(19.05)
1-5/8(41.3) 1-5/8(41.3) 1-5/8(41.3)
1-3/8(34.9) 1-3/8(34.9) 1-3/8(34.9)
PT40A + PT40A (Female)
PT40A + PT40A + PT32A (Female) PT40A + PT40A + PT40A (Female)
PT40A + PT40A (Female)
PT40A + PT40A + PT32A (Female) PT40A + PT40A + PT40A (Female)
3/4(22) (Female) 3/4(22) (Female) 3/4(22) (Female)
System Capacity HP(Ton)
Model Name
Product Refrigerant Charge lb(kg)
CF(Correction Factor) lb(kg)
Maximum Connectable No. of Indoor Units
Net Weight lb
kg
Dimension(W×H×D) inch
mm
Refrigerant Liquid inch(mm)
Connecting Low Pressure Gas inch(mm)
Pipes High Pressure Gas inch(mm)
Water Inlet mm
Connecting Outlet mm
Pipes Drain Outlet inch(mm)
10(8.0) 20(16.0) 30(24.0)
ARWB096DA2 ARWB192DA2 ARWB290DA2
16.1(7.3) 19.4(8.8) 19.4(8.8) + 16.1(7.3)
3.3(1.5) 6.6(3.0) 9.9(4.5)
16 32 49
(339.5)×1 (491.6)×1 (339.5)×1+(491.6)×1
(154)×1 (223)×1 (154)×1 + (223)×1
(30-13/32×44-3/32×21-1/2)×1 (30-13/32×44-3/32×21-1/2)×1 (30-13/32×44-3/32×21-1/2)×2
(772×1,120×547)×1 (772×1,120×547)×1 (772×1,120×547)×2
3/8(9.52) 1/2(12.7) 3/4(19.05)
7/8(22.2) 1-1/8(28.58) 1-3/8(34.9)
3/4(19.05) 7/8(22.2) 1-1/8(28.58)
PT32A (Female) PT40A (Female)
PT40A + PT32A (Female)
PT32A (Female) PT40A (Female)
PT40A + PT32A (Female)
3/4(22) (Female) 3/4(22) (Female) 3/4(22) (Female)
System Capacity HP(Ton)
Model Name
Product Refrigerant Charge lb(kg)
CF(Correction Factor) lb(kg)
Maximum Connectable No. of Indoor Units
Net Weight lb
kg
Dimension(W×H×D) inch
mm
Refrigerant Liquid inch(mm)
Connecting Low Pressure Gas inch(mm)
Pipes High Pressure Gas inch(mm)
Water Inlet mm
Connecting Outlet mm
Pipes Drain Outlet inch(mm)
40(32.0) 50(40.0) 60(48.0)
ARWB390DA2 ARWB480DA2 ARWB580DA2
19.4(8.8) + 19.4(8.8)
19.4(8.8) + 19.4(8.8) + 16.1(7.3) 19.4(8.8) + 19.4(8 8) + 19.4(8.8)
13.2(6.0) 16.5(7.5) 19.8(9.0)
64 64 64
(491.6)×2 (491.6)×2+(339.5)×1 (491.6)×3
(223)×2 (223)×2 + (154)×1 (223)×3
(30-13/32×44-3/32×21-1/2)×2 (30-13/32×44-3/32×21-1/2)×3 (30-13/32×44-3/32×21-1/2)×3
(772×1,120×547)×2 (772×1,120×547)×3 (772×1,120×547)×3
3/4(19.05) 3/4(19.05) 3/4(19.05)
1-5/8(41.3) 1-5/8(41.3) 1-5/8(41.3)
1-3/8(34.9) 1-3/8(34.9) 1-3/8(34.9)
PT40A + PT40A (Female)
PT40A + PT40A + PT32A (Female) PT40A + PT40A + PT40A (Female)
PT40A + PT40A (Female)
PT40A + PT40A + PT32A (Female) PT40A + PT40A + PT40A (Female)
3/4(22) (Female) 3/4(22) (Female) 3/4(22) (Female)
Outside units Information
ENGLISH
Installation Manual 9
Select the Best Location
Select space for installing outside unit, which will meet the following conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
• Do not use unit under any special environment where oil, steam and sulfuric gas exist.
• It is recommended to fence round the outside unit in order to prevent any person or animal from accessing the
outside unit.
• This product is prohibited for outdoor installation.
• Select installation location considering following conditions to avoid bad condition when additionally performing
defrost operation.
1. Install the outside unit at a place well ventilated and having a lot of sunshine in case of installing the product
at a place with a high humidity in winter (neare beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
2. Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of
installing the outside unit in winter at following location:
(1) Shade position with a narrow space
(2) Location with much moisture in neighboring floor.
(3) Location with much humidity around.
(4) Location where water gathers since the floor is not even.
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this character-
istic 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 encour-
aged 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.
Environment-friendly Alternative Refrigerant R410A
10 Outside Unit
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.
Inspection door(NOTICE 1)
(servicing space)
481(18-10/11)
345(13-1/2)
300mm(11-7/8 inch) more
(Servicing space)
300mm(11-7/8 inch) more
(Servicing space)
300mm(11-7/8 inch)more
(Servicing space)
450mm(17-3/4 inch) more
(Servicing space)
1
2
3
54
6
7
453(17-7/8)
174(6-7/8)
174(6-7/8)
182(7-1/8)
218(8-1/2)
419(16-1/2)
61(2-7/16)
137(5-3/8)
124(4-7/8)
128(5)
30(1-1/6)
60(2-3/8)
(NOTICE 2)
(NOTICE 2)
450(17-3/4)
450(17-3/4)
100mm(3-15/16 inch) more100mm(3-15/16 inch) more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more
(Serviceing space)
100 more
100 more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) more100mm(3-15/16 inch) more
(Serviceing space)(Serviceing space)
100mm(3-15/16 inch) 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.
(Unit: mm(inch))
Description
PRHR030A/040A PRHR020A
1 Low pressure Gas pipe connection port Ø28.58(1-1/8) Brazing connection Ø22.2(7/8) Brazing connection
2 High pressure Gas pipe connection port Ø22.2(7/8) Brazing connection Ø19.05(3/4) Brazing connection
3 Liquid pipe connection port Ø12.7(1/2) Brazing connection Ø9.52(3/8) Brazing connection
4 Indoor unit Gas pipe connection port Ø15.88(5/8) Brazing connection Ø15.88(5/8) Brazing connection
5 Indoor unit Liquid pipe connection port Ø9.52(3/8) Brazing connection Ø9.52(3/8) Brazing connection
6 Control box - -
7 Hanger metal M10 or M8 M10 or M8
Part NameNo.
Environment-friendly Alternative Refrigerant R410A
ENGLISH
Installation Manual 11
Installation space
Individual Installation
Collective / Continuous Installation
Required the minimum space as shown below for installation and
check. If the space is not fit on this drawing, consult with LG.
Space required for collective installation and continuous installation as shown below considering passage for air
and people.
: Service area
* In case of the water pipe passing side product, please make sufficient service place to avoid occurring
between water pipe and product side.
: Service area
20(3/4)
100(5-7/8)
350(13-25/32)
772(30-13/32)
H-Beam Support
[Unit: mm(inch)]
600(23-5/8)
547(21-17/32)
1,120(44-3/32)
100(5-7/8)
100(5-7/8)
20(3/4)
<Front View>
Water pipe
installation
space
<Top View>
Product
(Outside unit)
Service area
(Front)
[Unit: mm(inch)]
350(13-25/32)
20(3/4)
350(13-25/32)
772(30-13/32) 772(30-13/32)
100(5-7/8) 100(5-7/8)
600(23-5/8)
547(21-17/32)
20(3/4)
<Top view>
Product
(Outside unit)
Service area
(Front)
Product
(Outside unit)
Service area
(Front)
[Unit: mm(inch)]
350(13-25/32)350(13-25/32)
100(5-7/8) 100(5-7/8)
772(30-13/32)
20(3/4)
772(30-13/32)
100(5-7/8)
350(13-25/32)
772(30-13/32)
600(23-5/8) 547(21-17/32)
20(3/4)
<Top view>
Product
(Outside unit)
Service area
(Front)
Product
(Outside unit)
Service area
(Front)
Product
(Outside unit)
Service area
(Front)
Installation space
12 Outside Unit
Two Layer Installation
Space required for two layer installation as shown below considering passage for air and people.
: Service area
H-Beam Support
1,120(44-3/32)
100(5-7/8)
100
(5-7/8)
100(5-7/8)
<Front View>
[Unit: mm(inch)]
1,120(44-3/32)
100(5-7/8)
Installation space
ENGLISH
Installation Manual 13
Water control
Water control
Water control
14 Outside Unit
• Keep the water temperature between 10~45°C(50~113°F). Other it may cause the breakdown.
- Standard water supply temperature is 30°C(86°F) for Cooling and 20°C(68°F) for heating.
• Properly control the water velocity. Otherwise it may cause the noise, pipe vibration or pipe contraction, expansion
according to the temperature. Use the same water pipe size connected with the product or more.
• Refer to the water source pipe diameter and water velocity table below. As the water velocity is fast, air bubble will
increase.
• Be careful of the water purity control. Otherwise it may cause the breakdown due to water pipe corrosion.
(Refer to 'Standard Table for Water Purity Control')
• In case the water temperature is above 40°C(104°F), it is good to prevent the corrosion by adding the anticorrosive
agent.
• Install the pipe, valve and gauge sensor in the space where it is easy to maintain. Install the water valve in the low
position for drain, if required.
• Be careful not to let air in. If so, the water velocity will be unstable in the circulation, pump efficiency will also
decrease and may cause the piping vibration. Therefore, install the air purge where it may generate the air.
• Choose the following anti freezing methods. Otherwise, it will be dangerous for the pipe to break in the winter.
- Circulate the water with the pump before dropping the temperature.
- Keep the normal temperature by boiler.
- When the cooling tower is not operated for a long time, drain the water in the cooling tower.
- Use an anti-freeze. (For using an anti freeze, change the DIP switch on main PCB in outside unit.)
- Refer to the additive amount about freezing temperature as in the table given below.
• In addition to anti freeze, it may cause the change of the pressure in the water system and the low performance of
the product.
• Make sure to use the closed cooling type tower.
When applying the open type cooling tower, use a 2
nd
heat exchanger to make the water supply system a closed
type system.
Diameter [mm(inch)] Velocity range (m/s)
< 50(1-31/32) 0.6 ~ 1.2
50(1-31/32) ~ 100(5-7/8) 1.2 ~ 2.1
100100(5-7/8) < 2.1 ~ 2.7
Minimum temperature for anti freezing [°C(°F)]
0 -5(23) -10(14) -15(5) -20(-4) -25
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
Methanol (%) 0 6 12 16 24 30
Anti freeze type
Standard table for water purity control
The water may contain many foreign substances and hence may influence the performance and lifetime of the prod-
uct due to the corrosion of the condenser and water pipe. (Use water source that complies with the below standard
table for water purity control.)
If you use water supply other than the tap water to supply the water for the cooling tower, you must do a water quality
inspection.
• If you use the closed cooling tower, the water quality must be controlled in accordance with the following standard
table.
If you do not control the water quality in accordance with the following standard water quality table, it can cause per-
formance deterioration to the air conditioner and severe problem to the product
[Reference]
(1) The "O" mark for corrosion and scale means that there is possibility of occurrence.
(2) When the water temperature is 40°C or above or when uncoated iron is exposed to the water, it can result in corro-
sion. Therefore adding anti-corrosion agent or removing the air can be very effective.
(3) In case of using the closed type cooling tower, the cooling water and supplementing water must satisfy the water qual-
ity criteria of closed type system in the table.
(4) Supplementing water and supplied water must be supplied with tap water, industrial water and underground water
excluding filtered water, neutral water, soft water etc.
(5) 15 items in the table are general causes of corrosion and scale.
Items
pH(25°C)
Conductivity[25°C](mS/m)
Chlorine ion(mg CI
-
/l)
Sulfuric acid ion(mg SO
2
-
/l)
Acid demand[pH 4.8] (mg SiO2/l)
Total hardness(mg SiO2/l)
Ca hardness(mg CaCO3/l)
Ion silica(mg SiO2/l)
Fe(mg Fe/l)
Copper(mg Cu/l)
Sulfuric acid ion(mg S
2
/l)
Ammonium ion(mg NH4/l)
Residual chlorine(mg Cl/l)
Free carbon dioxide(mg CO2/l)
Stability index
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
Below 1.0
Below 1.0
Must not be detected
Below 0.3
Below 0.25
Below 0.4
-
Below 0.3
Below 0.1
Must not be detected
Below 0.1
Below 0.3
Below 4.0
-
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
O
O
O
O
-
-
-
-
O
O
O
O
O
O
O
O
-
-
-
-
-
O
O
O
-
O
O
O
O
O
Closed type
Basic Item
Reference Item
Effect
Circulating water Supplemented water Corrosion Scale
4
+
Water control
ENGLISH
Installation Manual 15
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.
40° or less
Rope supporter
A
B
Sub line
CAUTION
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than 20kg.
• PP bands are used to pack some products. Do not use them as a mean for transportation because they
are dangerous.
• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging
bag may suffocate children to death.
• When carrying in Outside Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outside Unit unstable, resulting in a fall.
• Use 2 belts of at least 8 m long.
• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent
damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
Lifting method
16 Outside Unit
Installation
Location of anchor bolt
The location of
anchor bolt
59(2-5/16)
50(2)
13(1/2)
599(23-19/32)
658(25-29/32)
[Unit: mm(inch)]
Installation
WARNING
• Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a personal injury.
• Have installation work in order to protect against a strong wind and earthquake. Any installation
deficiency may cause unit to fall down, resulting in a personal injury.
• Especially take care for support strength of the floor surface, water drain processing (processing of
water flown out from the outside unit during operation) and paths of the pipe and wiring when mak-
ing a base support.
ENGLISH
Installation Manual 17
Installation
Preparation of Piping
1) Cut the pipes and the cable.
n Use the accessory piping kit or the pipes purchased
locally.
n Measure the distance between the indoor and the out-
side unit.
n Cut the pipes a little longer than measured distance.
n Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
n Completely remove all burrs from the cut cross section
of pipe/tube.
n Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Flaring work
n Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4) Check
n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
"A"
<Wing nut type>
<Clutch type>
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
18 Outside Unit
Pipe diameter
Inch (mm)
A inch (mm)
Wing nut type Clutch type
Ø1/4 (Ø6.35)
0.04~0.07 (1.1~1.8) 0~0.02 (0~0.5)
Ø3/8 (Ø9.52)
Ø1/2 (Ø12.7)
Ø5/8 (Ø15.88)
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 19
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 tempera-
ture: 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
20 Outside 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 refrig-
erant piping has been completed.
① Pipe joint (auxiliary parts): Securely perform brazing with
a nitrogen blow into the service valve port.(Releasing
pressure : 0.02 MPa or less)
② Flare nut: Loose or tighten flare nut by using the wrench
with both ends. Coat the flare connection part with oil for
the compressor.
③ Cap: Remove caps and operate valve, etc. After opera-
tion, always reattach caps (tightening torque of valve
cap: 25Nm (250kg-cm) or more). (Don't remove the
internal part of the port)
④ Service port: Make the refrigerant pipe vacuum and
charge it using the service port. Always reattach caps
after completing work (tightening torque of service cap:
14Nm (140kg-cm) or more).
⑤ Liquid pipe
⑥ Gas pipe
⑦ Elbow joint (field supply)
Cautions in pipe connection/valve operation
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 21
Refrigerant piping installation
Slave
Outside Unit
Master
Outside Unit
Slave1
Outside
Unit
Slave2
Outside
Unit
Main
Outside Unit
1) For the high/low pressure common pipe, connect both master outside unit and slave outside units to the pipe by using
elbows.
2) For cutting the pipe, connect the high/low pressure common pipe after removing burrs, dusts and foreign material within
the pipe. Otherwise, the product may not operate due to sludge within the pipe.
3) For the working part leakage test, apply the nitrogen gas pressure of 3.8MPa (38.7kgf/cm
2
).
4) The vacuum criteria is to maintain the vacuum level to less than 5 Torr 1 hour after reaching 5 Torr. (Execute the vacuum
work again when it is below the criteria.)
5) Open the valve with the hexagon wrench.
Connecting
branch pipe
Combination specification
ARCNN20
[mm(inch)]
130(5-1/8)
416(16-3/8)
408(16-1/16)
111(4-3/8)
I.D.38.1(1-1/2)
I.D.34.9(1-3/8)
O.D.34.9(1-3/8)
I.D.41.3(1-5/8)
I.D.31.8(1-1/4)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.22.2(7/8)
I.D19.05
(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
331(13-1/32)
314(12-3/8)
O.D.19.05(3/4)
I.D.19.05(3/4)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.22.2(7/8)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.9.52(3/8)
70(2-3/4)
83(3-9/32)
O.D15.88(5/8) I.D9.52(3/8)
I.D12.7(1/2)
110(4-11/32)
O.D25.4(1)
I.D22.2(7/8)
I.D19.05(3/4)
120(4-23/32)
X2
O.D19.05(3/4)
I.D15.88(5/8)
I.D12.7(1/2)
110(4-11/32)
O.D25.4(1)
I.D22.2(7/8)
80(3-5/32)
O.D12.7(1/2)
I.D9.52(3/8)
70(2-3/4)
453(17-27/32)
491(19-9/32)
111
(4-3/8)
I.D28.58(1-1/8)
I.D34.9(1-3/8)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
I.D25.4(1)
I.D31.8(1-1/4)
I.D25.4(1)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
Low Pressure
Gas Pipe
High Pressure
Gas Pipe
Liquid Pipe
2 Outside Units 3 Outside Units
Connection of High/Low Pressure Common pipe
2 outside units
Connection of Outside units
22 Outside Unit
Refrigerant piping installation
3 Outside Units
Connecting
branch pipe
Combination specification
ARCNN20
ARCNN30
[mm(inch)]
130(5-1/8)
416(16-3/8)
408(16-1/16)
111(4-3/8)
I.D.38.1(1-1/2)
I.D.34.9(1-3/8)
O.D.34.9(1-3/8)
I.D.41.3(1-5/8)
I.D.31.8(1-1/4)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.22.2(7/8)
I.D19.05
(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
331(13-1/32)
314(12-3/8)
O.D.19.05(3/4)
I.D.19.05(3/4)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.22.2(7/8)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.9.52(3/8)
70(2-3/4)
83(3-9/32)
O.D15.88(5/8) I.D9.52(3/8)
I.D12.7(1/2)
110(4-11/32)
O.D25.4(1)
I.D22.2(7/8)
I.D19.05(3/4)
120(4-23/32)
X2
O.D19.05(3/4)
I.D15.88(5/8)
I.D12.7(1/2)
110(4-11/32)
O.D25.4(1)
I.D22.2(7/8)
80(3-5/32)
O.D12.7(1/2)
I.D9.52(3/8)
70(2-3/4)
453(17-27/32)
491(19-9/32)
111
(4-3/8)
I.D28.58(1-1/8)
I.D34.9(1-3/8)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
I.D25.4(1)
I.D31.8(1-1/4)
I.D25.4(1)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
O.D.34.9(1-3/8)
125(4-29/32)
I.D.41.3(1-5/8)
I.D19.05
(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
I.D.34.9(1-3/8)
111(4-3/8)
I.D34.9(1-1/8)
I.D.28.58(1-1/8)
I.D.41.3(1-5/8)
341(13-7/16)
298(11-47/64)
O.D.19.05(3/4)
O.D.19.05(3/4)
I.D.15.88(5/8)
I.D.22.2(7/8)
I.D.12.7(1/2)
334(13-5/32)
281(11-1/16)
83(3-9/32)
O.D12.7(1/2)
I.D6.35(1/4)
I.D9.52(3/8)
110(4-11/32)
O.D.19.05(3/4)
I.D.12.7(1/2)
I.D.15.88(5/8)
110(4-11/32)
458(18-1/32)
505(19-7/8)
125(4-29/32)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
I.D38.1(1-1/2)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D28.58(1-1/8)
130(5-1/8)
I.D12.7(1/2)
I.D19.05
(3/4)
I.D22.2(7/8)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
I.D41.3(1-5/8)
O.D34.9(1-3/8)
O.D38.1(1-1/2)
O.D28.58(1-1/8)
O.D15.88(5/8)
90(3-17/32)
70(2-3/4)
120(4-23/32)
120(4-23/32)
I.D19.05(3/4)
I.D15.88(5/8)
O.D22.2(7/8)
I.D28.58(1-1/8)
I.D22.2(7/8)
Low Pressure
Gas Pipe
High Pressure
Gas Pipe
Liquid Pipe
ENGLISH
Installation Manual 23
CAUTION:
• Ensure that the branch pipes are attached horizontally or vertically.(see the diagram below.)
Facing
upwards
Facing
downwards
Within 3°
Within 3°
Viewed from point A
in direction of arrow
Horizontal
plane
A
Within
±10
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.
Gas pipe
Gas pipe
Liquid pipe
Liquid pipe
HR Unit
1
2
3
4
High pressure
Gas pipe
Liquid pipe
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
Six-sided Nut
(M10 or M8)
Hanger metal
Hanger metal
Hanger metal
Flat washer
Flat washer
Flat washer
(M10)
Hanging bolt
Hanging bolt
Hanging bolt
(M10 or M8)
A
Insulation
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.
Refrigerant piping installation
24 Outside 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
PRHR030A(3 rooms)PRHR020A(2 rooms) PRHR040A(4 rooms)
1
2
3
1
2
1
3
2
4
WARNING
• 1 port of HR unit allows up to 14.1kW based on cooling capacity of the indoor unit (up to 14.1kW
(48MBh) for max installation).
• The maximum total capacity of the indoor units connected to one PRHR040 HR unit is 47kW
(160MBh). In case of installation of four indoor units of 14.1kW (48MBh), 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
HR unit PRHR020A PRHR030A PRHR040A
Low pressure gas pipe Ø22.2(7/8) Ø28.58(1-1/8) Ø28.58(1-1/8)
High pressure gas pipe Ø19.05(3/4) Ø22.2(7/8) Ø22.2(7/8)
Liquid pipe Ø9.52(3/8) Ø12.7(1/2) Ø12.7(1/2)
[Unit:mm(inch)]
Refrigerant piping installation
ENGLISH
Installation Manual 25
[ Reducers for indoor unit and HR unit ]
Models
High pressure
Gas pipe
Low pressure
Liquid pipe
Indoor unit
reducer
HR unit
reducer
PRHR020A
OD22.2(7/8) Ø19.05(3/4)
Ø15.88(5/8)
OD15.88(5/8)
Ø12.7(1/2)
Ø6.35(1/4)OD9.52(3/8)
Ø6.35(1/4)OD9.52(3/8)
OD19.05(3/4) Ø15.88(5/8) Ø12.7(1/2)
OD22.2(7/8) Ø19.05(3/4)
Ø15.88(5/8)
PRHR030A
PRHR040A
OD15.88(5/8)
Ø12.7(1/2)
OD28.58(1-1/8) Ø22.2(7/8) Ø19.25(3/4)
OD12.7(1/2) Ø9.52(3/8)
OD12.7(1/2) Ø9.52(3/8)
OD15.88(5/8) Ø12.7(1/2)
OD19.05(3/4) Ø15.88(5/8)
[Unit:mm(inch)]
Refrigerant piping installation
26 Outside Unit
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 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 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
6.35(1/4) 9.52(3/8) 12.7(1/2) 15.88(5/8) 19.05(3/4) 22.2(7/8) 25.4(1)
0.8(0.03) 0.8(0.03) 0.8(0.03) 0.99(0.03) 0.99(0.03) 0.99(0.03) 0.99(0.03)
Minimum thickness
[mm(inch)]
Outer diameter
[mm(inch)]
Refrigerant piping installation
ENGLISH
Installation Manual 27
Pipe Length between Outside Units
(Low pressure gas pipe, High pressure gas pipe, Liquid pipe)
Refrigerant piping installation
28 Outside Unit
772(30-13/12)
772(30-13/12)
[unit :mm(inch)]
Min. 100(5-7/8)
Min. 100(5-7/8)
Distance between outside units
Distance between outside units
= Product length 772(30-13/12) + Min. 100(5-7/8)
Refrigerant piping installation
1) Water pipe system diagram
• The water pressure resistance of the water pipe system of this product is 1.98MPa
• When the water pipe passes indoors, make sure to execute heat insulation on the pipe so that water drops do not form on
the outer side of the water pipe.
• The size of the drain pipe must be equal to or larger than the diameter of the connecting product.
- Always install a trap so that the drained water does not back flush.
• Always install a strainer (50Mesh or above) at the entrance of the water pipe. (When sand, trash, rusted pieces get mixed
into the water supply, it can cause problems to the product due to blocking)
- If On/Off valve is applied, by interlocking with outside unit, it can save the energy consumption of pump by blocking the
water supply to the outside unit not operating. Select appropriate valve and install on site if necessary.
• Install a pressure gauge and temperature gauge at the inlet and outlet of the water pipe.
• Flexible joints must be installed not to cause any leakage from the vibration of pipes.
• Install a service port to clean the heat exchanger at the each end of the water inlet and outlet.
• For the components of the water pipe system, always use components above the designed water pressure.
2) Water pipe connection
• The water pipe should be the same size of the connection on the product or more.
• If necessary install the insulation material in the water pipe inlet/outlet to prevent water drop, freeze and to save energy.
(Use the above 20mm thickness PE insulation material.)
• Tightly connect the socket to the water pipe refer to below table for recommended specification.
(Too much torque may cause the damage of the facility.)
Water pipe
outlet
Gate valve
Gate valve
Service port
Pressure gauge
Temperature gauge
Service port
Strainer
Drain line
Condensed
water drain
Water pipe
Inlet
Do not directly connect the drain outlet to the water pipe outlet.
(It can cause problems to the product.)
Installation of water pipe
ENGLISH
Installation Manual 29
Water pipe
connection
Water pipe inlet
Water pipe outlet
mm inch (kN) (kgf) (kN) (kgf) (N
.
m) (kgf
.
m)(N
.
m) (kgf
.
m)
12.7 1/2 3.5 350 2.5 250 20 2 35 3.5
19.05 3/4 12 1,200 2.5 250 20 2 115 11.5
25.4 1 1 1.2 1,120 4 400 45 4.5 155 15.5
31.8 1 1/4 14.5 1,450 6.5 650 87.5 8.75 265 26.5
38.1 1 1/2 16.5 1,700 9.5 950 155 16 350 35.5
50.8 2 21.5 2,200 13.5 1,400 255 26 600 61
Pipe thickness Shear stress Tensile stress Bending moment Torque
Refrigerant piping installation
30 Outside Unit
Device protection unit
Strainer on water pipe
To protect the water cooling type product, you must install a strainer with 50 mesh or more on the heat water supply pipe.
If not installed, it can result in damage of heat exchanger by the following situation.
1. Heat water supply within the plate type heat exchanger is composed of multiple small paths.
2. If you do not use a strainer with 50 mesh or more, alien particles can partially block the water paths.
3. When running the heater, the plate type heat exchanger plays the role of the evaporator, and at this time, the temperature of the
coolant side drops to drop the temperature of the heat water supply, which can result in icing point in the water paths.
4. And as the heating process progresses, the water paths can be partially frozen to lead to damage in plate type heat exchanger.
5. As a result of the damage of the heat exchanger from the freezing, the coolant side and the heat water source side will be mixed
to make the product unusable.
Heat Source
(Water)
Refrigerant
1. Pollution of
Heat source
2. Partially frozen 3. Damage
Device protection unit
ENGLISH
Installation Manual 31
Upper graph is a theoretical value for selection and it may be different according to specification of strainer.
: Suggestion range
: Allowed range
Head loss of strainer on water pipe
Base on ARWB096 Base on ARWB192
Device protection unit
32 Outside Unit
Installation of flow switch
• The flow switch must be installed at the horizontal pipe of the heat water supply outlet of the product and check the direc-
tion of the heat water flow before the installation. (Picture 1)
• When connecting the flow switch to the product, remove the jump wire to connect to the communication terminal (4(A) and
4(B)) of the outside unit control box. (Picture 2, 3) (Open the cover of the flow switch and check the wiring diagram before
connecting the wires. The wiring method can differ by the manufacturer of the flow switch.)
• If necessary, adjust the flow rate detection screw after consulting with an expert and adjust to the minimum flow rate
range. (Picture 4) (Minimum flow rate range of this product is 50%. Adjust the flow switch to touch the contact point when
the flow rate reaches 50% of the flow rate.)
- Reference flow rate : 8HP – 21 GPM, 16HP – 42 GPM
10HP – 25 GPM, 20HP – 50 GPM
Picture 1
Picture 4
Picture 3
3(B) 4(A) 4(B)
Picture 2
Flow switch work
• It is recommended to install the flow switch to the water collection pipe system
connecting to the outside unit.
(Flow switch acts as the 1st protection device when the heat water is not sup-
plied. If a certain level of water does not flow after installing the flow switch, an
error sign of CH24 error will be displayed on the product and the product will stop
operating.)
• When setting the flow switch, it is recommended to use the product with default
set value to satisfy the minimum flow rate of this product. (The minimum flow rate
range of this product is 50%. Reference flow rate : 8HP - 80LPM, 16HP -
155LPM)
• Select the flow switch with the permitted pressure specification considering the
pressure specification of the heat water supply system. (Control signal from out-
side unit is AC 220V.)
1 inch or
3/4 inch
socket
Cover
Micro-switch
Adjustment screw
Vibration plate
Bellows
Pad
• If the set value does not satisfy the minimum flow rate or if the set value is changed by the user arbitrarily, it can result
in product performance deterioration or serious product problem.
• If the product is operated with the heat water supply not flowing smoothly, it can damage the heat exchanger or cause
serious product problems.
• In case of CH24 or CH180 error, there is a possibility that the plate type heat exchanger is partially frozen inside. In this
case resolve the issue of partial freezing and then operate the product again. (Cause of partial freezing : Insufficient
heat water flow rate, water not supplied, insufficient coolant, alien particle penetrated inside plate type heat exchanger)
• When the product operates while the flow switch touches the contact point at the flow rate range out of the permitted
range, it can cause product performance deterioration or serious product problem.
• Must use the normal closed type flow switch - Circuit of outside unit is normal closed type
Refrigerant piping system
Refrigerant piping system
Refrigerant piping system
Example : 2 Outdoor units, 4 HR units and 10 indoor units
Ⓐ Outdoor unit
Ⓑ Y branch
Ⓒ HR unit
Ⓓ Indoor unit
WARNING
* : Serial connection of HR units : Capacity sum of indoor units ≤ 160kBtu/hr
• Refer to the HR unit PCB part for the valve group control setting.
• It is recommended that difference in pipe lengths between an HR unit and indoor units, for example
difference in length of a, b, c, and d, be minimized. The larger difference in pipe lengths, the more different
performance between indoor units.
• Piping length from outdoor branch to outdoor unit ≤ 10m(33ft), equivalent length : max 13m(43ft)
(For 18 HP or more)
h If the large capacity indoor units(5~10 HP, using over Ø15.88(5/8) / Ø9.52(3/8))are installed, it should use
Valve Group setting.
■ Case 1 ("a")
: Maximum height is 15m(236ft) if you install with Y branch.
■ Case 2 ("b")
: Height is zero(0) m in HR unit serial connector.
A1
C1
D1
D2
D3
D4
D6
D7
D8
D9
D10
E1
E2
A
F3
C1
B
C2
C3
*
B1
B2
A2
A3
a
b
c
d
e
g
j
k
f
i
H
h
"a"
"b"
F2
F1
D
E
C2
D5
C4
C3
Master
Slave 1
Slave 2
ENGLISH
Installation Manual 33
Refrigerant piping system
34 Outside Unit
Ú Refrigerant pipe diameter between branches and HR units (B,C,D)
Ú
Total pipe length (A+B+C1+C2+C3+D+a+b+c+d+e+f+g+i+j+k) ≤ 300m(984ft) (500m(1640ft)*)
Downward indoor unit total capacity
[kW(Btu/h)]
≤ 5.6 (19,100) Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8)
< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2)
< 22.4 (76,400) Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
< 33 (112,600) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
< 47 (160,400) Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)
< 71 (242,300) Ø15.88(5/8) Ø28.58(1-1/8) Ø28.58(1-1/8)
< 104 (354,900) Ø19.05(3/4) Ø34.9(1-3/8) Ø28.58(1-1/8)
104 (354,900) ≤ Ø19.05(3/4) Ø41.3(1-5/8) Ø28.58(1 -1/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
Outdoor unit ~ the farthest indoor unit Equivalent pipe length
A+B+C3+D+K ≤ 150m(492ft)(200m(656ft))(*) A+B+C3+D+K ≤ 175m(574ft)(225m(738ft))(*)
HR Unit ~ neighboring HR Unit
D≤ 10m(33ft)
First indoor branch ~ the farthest indoor unit
B+C3+D+k ≤ 90m(295ft)(*)
First outdoor branch ~ the farthest outdoor unit
E+F3 ≤ 10m(33ft)
Difference in height (outdoor unit ÷ indoor unit)
H ≤ 100m(328ft)
Difference in height (indoor ~ indoor unit)
H ≤ 15m(49ft)
Piping length from each indoor unit to the closest HR Unit
a,b,c,d,e,f,g, i, j, k ≤ 40m(131ft)
E1 ~
D10
C3 ~ C4
B1 ~
D10
E1 ~
A3
H
h
g, I, j, k
CAUTION
• Assume equivalent pipe
length of Y branch to be
0.5m(1.6ft), calculation
purpose.
CAUTION:
• Should not be exceed
10m(33ft) between
neighboring HR unit.
• Serial connection of
HR units : Capacity
sum of indoor units ≤
160kBtu/hr.
(*) Conditional Application (Incase of D10 is the farthest indoor)
Below condition must be satisfied for 40m ~ 90m(131ft ~ 295ft) piping length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step,
except if the pipe diameter B,C3,D is same as Diameter A (Main pipe diameter)
Ø6.35 ’ Ø9.52 ’ Ø12.7 ’ Ø15.88 ’ Ø19.05 ’ Ø22.2 ’ Ø25.4*,
Ø28.58 ’ Ø31.8*, Ø34.9 ’ Ø38.1*
* : It is not necessary to size up.
h
If available on site, it use this size. Otherwise it can't be increased.
2) While calculating total refrigerant piping length, pipe B,C3,D length should be calculated twice
A+Bx2+C3x2+Dx2+C1+C2+a+B+C+D+e+f+g+i+j+k ≤ 500m(1640ft)
2) Length of pipe from each indoor unit to the closest HR Unit (a,b,c,d,e,f,g,i,j,k) ≤ 40m(131ft)
3) [Length of pipe from outdoor unit to the farthest indoor unit D10 (A+B+C+D+k)]
• [Length of pipe outdoor unit to the closest indoor unit D1 (C1+a)] ≤ 40m(131ft)
Note:
Equivalent piping length for Y Branch and other pipes can be calculated with following table.
Pipe
Ø6.35 Ø9.52 Ø12.7 Ø15.88 Ø19.05 Ø22.2 Ø25.4 Ø28.58 Ø31.8 Ø34.9 Ø38.1 Ø41.3 Ø44.5 Ø53.98
(1/4") (3/8") (1/2") (5/8") (3/4") (7/8") (1") (1 1/8") (1 1/4") (1 3/8") (1 1/2") (1 5/8") (1 3/4") (2 1/8")
Elbow
0.16 m 0.18 m 0.2 m 0.25 m 0.35 m 0.4 m 0.45 m 0.5 m 0.55 m 0.6 m 0.65 m 0.7 m 0.75 m 0.85 m
(0.53 ft) (0.59 ft) (0.66 ft) (0.82 ft) (1.15 ft) (1.31 ft) (1.48 ft) (1.64 ft) (1.80 ft) (1.97 ft) (2.13 ft) (2.30 ft) (2.46 ft) (2.79 ft)
Y Branch 0.5 m (1.64 ft)
Header 1.0 m (3.28 ft)
HR Unit 2.5 m (8.20 ft)
Refrigerant piping system
ENGLISH
Installation Manual 35
u Outdoor Unit Connection
Ú Refrigerant pipe diameter before 1st branch (A,E,F)
WARNING
When the equivalent length between the outdoor unit and a indoor unit is 90 m or more, the size of main
pipes (only liquid pipe) must be increased one grade.
WARNING
Do not choose the main pipe diameter, namely A, by downward indoor unit total capacity but its outdoor unit model name.
Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model name.
EX) Where connecting the indoor units to the 22 HP (61.5 kW) outdoor unit to 130% of its system capacity (79.9 kW) and
branching one HR unit of four 7k indoor units (8.4kW) at the 1st branch.
Main pipe diameter(22 HP outdoor unit): Ø15.88(5/8)(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe),
Ø28.58(1-1/8)(High pressure gas pipe)
Pipe diameter between 1st and 2nd branch (71.5kW indoor units): Ø19.05(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe)
and Ø28.58(1-1/8)(High pressure gas pipe) in conformity with
downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is Ø15.88(5/8)(Liquid pipe), Ø34.9(1-3/8)(Low pressure gas pipe) ,
Ø28.58(1-1/8)(High pressure gas pipe), it should be used as the diameter of the main pipe and the connection pipe between 1st and
2nd indoor branches.
Liquid pipe
8, 10HP..........................................Ø9.52(3/8) ’ Ø12.7(1/2)
12, 14, 16HP..................................Ø12.7(1/2) ’ Ø15.88(5/8)
18, 20, 22, 24HP............................Ø15.88(5/8) ’ Ø19.05(3/4)
Upward outdoor unit total capacity
[HP]
8 Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
10 Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
12 Ø12.7(1/2) Ø28.58(1-1/8) Ø19.05(3/4)
14, 16 Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)
18, 20 Ø15.88(5/8) Ø28.58(1-1/8) Ø22.2(7/8)
22, 24 Ø15.88(5/8) Ø34.9(1-3/8) Ø28.58(1-1/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
u Indoor Unit Connection
Ú Indoor unit connecting pipe from branch (a~k)
Indoor unit capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
< 22.4(76,400)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
36 Outside Unit
Refrigerant piping system
HR1
48k 48k 48k 48k
1 2 3 4
HR1
36k 36k
A
A
1
1
2
A
HR2
36k 36k
3 4
HR1
12k 12k24k 24k
1 2 3 4
HR2
48k 48k 48k 12k
5 6 7 8
Prohibited pattern
Pattern
Indoor unit
• Capacity sum of indoor units is over 160kBtu/hr.
Y Branch pipe
Pattern
HR
Unit
Outdoor
Unit
Indoor
Unit
Low pressure Gas pipe
High pressure Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
1) under 40m
Keep the sum of indoor capacity is under 160kBtu/hr
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
2) Same horizontal level
1) under 40m
2) Same horizontal level
Y branch
Height
It's not allowed
Keep the sum of indoor capacity is under 160kBtu/hr
1) Keep the 40m distance from the first branch to the farthest indoor.
2) Keep the horizontal level between HR units.( for example, the same flour. )
ENGLISH
Installation Manual 37
Refrigerant piping system
Oil trap application method between outside units
• Because of the possibility of oil being accumulated in the outside unit that has stopped, when there is a height difference between
outside unit pipes or if the pipe distance between the outside units is over 2m(6.6ft), you must always apply an oil trap. (But, the oil
trap between outside units is limited to 1 time and is only applied to the gas pipe.)
• If the pipe distance between the outside units is 2m(6.6ft) or below, and if the location of the main pipe is lower than that of the out-
side unit and if the location of the main pipe is lower than that of the outside unit, the oil trap does not have to be applied.
• If the location of the main pipe is higher than the location of the outside unit, be careful since the oil can be accumulated in the
stopped outside unit.
• If there is high/low difference between the outside unit pipes, oil can be accumulated to the outside unit on the lower location until
the unit stops.
High/Low difference
between the outside units
High/Low difference
between outside units pipes
High/Low difference
between outside units pipes
Location of
main pipe
Location of
outside units
Location of main pipe
Location of
main pipe
Location of
main pipe
Location of main pipe
Location of
outside units
Oil trap
Oil trap
Oil trap
2m(6.6ft) or less
2m(6.6ft) or less
2m(6.6ft) or less
Over
0.2m(0.7ft)
Over 2m(6.6ft)
Oil is accumulated on the
outside unit because it can-
not be poured out from the
bottom of the pipe.
Because the oil flow to the right pipe, oil gets accumulated on
the outside unit on the lower side until the outside unit stops.
• When pipe distance between the outside
units is 2m(6.6ft) or less
• Example of incorrect installation
• When pipe distance between the outside
units exceed 2m(6.6ft)
• Example of correct installation
38 Outside Unit
Calculation of amount of refrigerant
Refrigerant piping system
The calculation of the additional charge should take into account the length of pipe.
If a negative result is obtained from
the calculation, no refrigerant needs
to be added.
CAUTION
Additional charge (kg)
Product charge(1unit)(kg)
=
+
+
+
+
+
+=
+
Total liquid pipe (m): Ø22.2mm
x 0.354(kg/m)
x 0.266(kg/m)
x 0.173(kg/m)
x 0.118(kg/m)
x 0.061(kg/m)
x 0.022(kg/m)
Total liquid pipe (m): Ø19.05mm
Total liquid pipe (m): Ø15.88mm
Total liquid pipe (m): Ø12.7mm
Total liquid pipe (m): Ø9.52mm
Total liquid pipe (m): Ø6.35mm
+
x 0.5 kg
Number of installed HR units
CF(kg) (Correction factor)
Total amount(kg)
A
A B
B
Outside unit
Header branch
Indoor unit
Ex) 10HP
Additional Charge = A x 0.041 + B x 0.041 + C x 0.041
+ D x 0.041 + E x 0.015 + HR + CF
= 164 x 0.041 + 33 x 0.041 + 33 x 0.041
+ 33 x 0.041 + 33 x 0.015 + 0(CF)
= 11.3lbs(5.1kg)
A : Ø9.52(3/8), 50m(164ft)
B : Ø9.52(3/8), 10m(33ft)
C : Ø9.52(3/8), 10m(33ft)
D : Ø9.52(3/8), 10m(33ft)
E : Ø 6.35(1/4), 10m(33ft)
u Special condition 1
In case of the No. of CST TQ/RAC SE/ARTCOOL SF models are over than 50% of the connected
indoor units when the total No. of connected indoor units are over than 50% of the max. connectable
indoor units.
n Additional refrigerant charging amount (kg(lbs)) : Ⓒ
= (A x
α+ B x ß) - (AVG x ß)
• A = Total No. of TQ, SE and SF Indoor units, α= 0.5
• B = Total No. of except TQ, SE and SF Indoor units, ß = 0.3
• AVG = 50% of Max. No. of connectable Indoor units.
Example)
1) Installation Information
- Outside unit : 10HP
- Total indoor units : 6 units (TQ 3 units, SE 2 units, BH 1 unit)
2) Information from PDB
- Max. No. of connectable indoor units : 16 units
- Calculated additional refrigerant amount = 2kg (4.41lbs) : Ⓑ
3) Indoor refrigerant charging amount
= (5 units x 0.5+1 unit x 0.3) - (8 units x 0.3) = 0.4 kg(0.88lbs) : Ⓒ
▶ Revised the total additional charging amount = Ⓑ + Ⓒ = 2kg (4.41lbs) + 0.4 kg(0.88lbs)
= 2.4 kg(5.29lbs)
+=
Total amount(kg)
AB
+
C
ENGLISH
Installation Manual 39
Refrigerant piping system
▶ Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
p If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outside Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 2m(6.6ft) from the floor (Wall mounted type ’ Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress
Total amount of refrigerant in the system
≤ 0.44 (kg / m
3
)(0. 028(lb/ft
3
))
Volume of the room at which Indoor Unit of the least capacity is installed
Note:
Fill in the f-gas Label attached on outside about the quantity of the fluorinated greenhouse gases
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for the addition or removal of
refrigerant)
③ The total Charge (①+②)
▶
Refer to model information since the CF Value of correction factor differs depending on model.
u Special condition 2
If you install the indoor units below more than 5EA, calculate the amount of refrigerant by multiplying
the PF value according to the total pipe length(refer to the table below).
ARNU093TN*2/ARNU123TN*2/ARNU153TN*2/ARNU183TM*2/ARNU243TM*2
Total Pipe length Pipe length factor(PF)
< 100 m (328.1 ft) 1.00
100 m (328.1 ft) ~200 m (656.2 ft) 0.91
200 m (656.2 ft) < 0.82
40 Outside Unit
Refrigerant piping system
Branch pipe Fitting
Y branch
A
B
To Outside Unit
To Branch Piping or Indoor Unit
A
B
Facing
upwards
Facing
downwards
Within ±3° Within ±3°
Viewed from point A
in direction of arrow
Horizontal
plane
Within +/- 10°
A
Insulator
(included with kit)
Liquid and gas
pipe joints
Insulator for
field piping
Tape
(field supply)
• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures described is different from the size
of the joint, the connecting section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
ENGLISH
Refrigerant piping system
Thermal insulation of refrigerant piping
Heat
insulation
material
Outer
covering
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed
Water-proof hemp cloth + Bronze asphalt
Outside
Water-proof hemp cloth + Zinc plate + Oily paint
Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
• Be sure to fully insulate connecting portion.
Liquid pipe
Gas pipe
Power lines
Finishing tape
Insulating material
Bad example
Good example
These parts are not insulated.
B A C
A
B
C
A
C
D
E
A
B
C
D
E
Transmission lines
F
Liquid pipe
Transmission lines
Transmission lines
Separation
Gas pipe
Power lines
Insulating material
A
B
C
D
E
A
A
B
F
Heat insulation material
Pipe
Outer covering
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
Power lines
E
D
D
B
A
C
Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with
enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit
and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a
possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.
1m1m
A
B
D
F
G
B
G
D
B
H
I
J
A
E
B
I
A
B
D
C
Inner wall (concealed)
Floor (fireproofing)
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
Outer wall Outer wall (exposed)
Penetrations
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
When filling a gap with mortar, cover the
penetration part with steel plate so that
the insulation material will not be caved in.
For this part, use incombustible materials
for both insulation and covering.(Vinyl
covering should not be used.)
Installation Manual 41
42 Outside Unit
Y branch pipe and header branch pipe type
Y branch pipe
Y branch pipe and header branch pipe type
[unit:mm]
Models
Low Pressure Gas Pipe High Pressure Gas Pipe
Liquid pipe
ARBLB01621
ARBLB03321
ARBLB07121
ARBLB14521
I.D 6.35
I.D 9.52
I.D 6.35
I.D 6.35
I.D 9.52
O.D 12.7
I.D 6.35
O.D 19.05
I.D 12.7
O.D 9.52
O.D 12.7
I.D 9.52
I.D 9.52
I.D 15.88 I.D 19.05
I.D 12.7
I.D 12.7
I.D 19.05
I.D 15.88
I.D 12.7
I.D 19.05
O.D 15.88
I.D 9.52
I.D 12.7
O.D 12.7
I.D 6.35
I.D 9.52
I.D 15.88
I.D 19.05
I.D 22.2
I.D 22.2
I.D 19.05
I.D 15.88
I.D 12.7
I.D 15.88
I.D 19.05
I.D 22.2
I.D 12.7
I.D 12.7
I.D 9.52
I.D 9.52
I.D 6.35
I.D 9.52
I.D 12.7
I.D 6.35
I.D 9.52
I.D 15.88
O.D 19.05
O.D 22.2
O.D 15.88
O.D 28.58
I.D 19.05
O.D 15.88
I.D 34.9
O.D 31.8
I.D 28.58
I.D 31.8
I.D 31.8(1-1/4)
I.D 28.58
I.D 22.2
I.D 19.05
I.D 15.88
I.D 12.7
I.D 19.05 I.D 15.88
I.D 28.58
I.D 22.2
I.D 12.7
I.D 19.05
I.D 22.2
I.D 34.9
I.D 34.9
I.D 22.2
I.D 28.58
I.D 28.58
I.D 38.1
I.D 41.3
I.D 34.9
I.D 38.1
I.D 12.7
I.D 15.88
I.D 12.7
I.D 15.88
I.D 15.88
I.D 12.7
I.D 25.4
O.D 19.05
O.D 19.05
I.D 22.2
I.D 28.58
O.D 25.4
I.D 22.2
I.D 15.88
I.D 19.05
I.D 12.7
I.D 12.7
I.D 19.05
I.D 15.88
I.D 19.05
I.D 22.2
I.D 25.4
¡
O.D 22.2
O.D 38.1
I.D 19.05
I.D 15.88
I.D 41.3
I.D 38.1
I.D 41.3
O.D 34.9
O.D12.7
O.D19.05
I.D9.52
I.D25.4
I.D25.4
I.D22.2
I.D22.2
I.D19.05
I.D19.05
I.D28.58
I.D25.4
O.D25.4
I.D19.05
I.D22.2
I.D28.58
I.D31.8
I.D34.9
I.D31.8
I.D28.58
I.D25.4
I.D25.4
I.D28.58
I.D31.8
O.D19.05
I.D12.7
I.D15.88
I.D9.52
O.D15.88
O.D15.88
I.D12.7
I.D12.7
O.D12.7
I.D9.52
O.D19.05
I.D15.88
O.D25.4
I.D22.2
I.D15.88
I.D12.7
I.D19.05
I.D22.2
I.D22.2
I.D19.05
I.D22.2
I.D19.05
I.D15.88
I.D15.88
I.D25.4
I.D9.52
I.D12.7
I.D12.7
I.D12.7
I.D15.88
I.D15.88
I.D15.88
I.D9.52
I.D9.52
ENGLISH
Installation Manual 43
Leakage test and vacuum
Leakage test and vacuum
Leak test
Close
Indoor unit
Nitrogen gas
Outside unit
Close Close
Close
Liquide pipe
Liquide pipe
Liquide pipe
Gas pipe
Gas pipe
Gas pipe
Liquid side
Gas side
Indoor unit
Nitrogen gas
Nitrogen gas
Liquid side
Gas side
1unit
2Units, 3Units
High/low pressure
common pipe
High/low pressure
common pipe
High/low pressure
common pipe
Close
Close
Slave Unit
Close
Close
Close
Master Unit
Leak test should be m
ade by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm
2
). If the pressure does not drop for 24
hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to
the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas pipe and
high/low pressure common pipe). The test result can be judged good if the pressure has not be reduced after leaving
for about one day after completion of nitrogen gas pressurization.
Note:
If the ambient temperature differs between the time when pressure is applied and when the pressure drop is
checked, apply the following correction factor
There is a pressure change of approximately 0.1 kg/cm
2
(0.01 MPa) for each 1°C of temperature difference.
Correction= (Temp. at the time of pressurization – Temp. at the time of check) X 0.1
For example: Temperature at the time of pressurization (3.8 MPa) is 27 °C
24 hour later: 3.73 MPa, 20°C
In this case the pressure drop of 0.07 is because of temperature drop
And hence there is no leakage in pipe occurred.
To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the
cylinder must be at higher position than the bottom when you pressurize the system.
Usually the cylinder is used in a vertical standing position.
44 Outside Unit
Vacuum
Vacuum drying should be made from the service port provided on the outside unit’s service valve to the vacuum
pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid
pipe, gas pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.
• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa (5 Torr, -755mmHg).
1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system
to -100.7kPa.
After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system may
contain moisture or leak.
2. Following should be executed if there is a possibility of moisture remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa(vacuum break) with nitrogen
gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the system
cannot be evacuated to -100.7kPa within 2 hrs, repeat the steps of vacuum break and its drying.
Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.
Vacuum pump
Indoor unit
Outside unit
Close
Close
Close
High/low pressure
common pipe
Liquide pipe
Gas pipe
Liquid side
Gas side
Scale
Use a graviometer. (One that can measure
down to 0.1kg). If you are unable to prepare
such a high-precision gravimeter you may
use a charge cylinder.
• Vacuum should be done for 3 hours or more
after the pressure is under 0.5 torr.
Vacuum pump
Vacuum pump
Indoor unit
Liquid side
Gas side
1Unit
2Units, 3Units
Slave Unit
Close
Close
Close
High/low pressure
common pipe
Liquide pipe
Gas pipe
Master Unit
Close
Close
Close
High/low pressure
common pipe
Liquide pipe
Gas pipe
Note : Always add an appropriate amount of refrigerant. (For the refrigerant additional charge)
Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outside units will be opened.)
When installing and moving the air conditioner to another site, recharge 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.
Leakage test and vacuum
ENGLISH
Installation Manual 45
Electrical Wiring
Electrical Wiring
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
HR
unit
HR
unit
HR
unit
HR
unit
2-core shield cable Multi-core cable
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment,
wiring regulations and guidance of each electric power company.
2. Install the Outside Unit transmission line away from the power source wiring so that it is not affected by elec-
tric noise from the power source. (Do not run it through the same conduit.)
3. Be sure to provide designated grounding work to Outside Unit.
4. Give some allowance to wiring for electrical part box of Indoor and Outside Units, because the box is some-
times removed at the time of service work.
5. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will
be burnt out.
6. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different sys-
tems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erro-
neous operations. ( mark in the figure below)
7. Only the transmission line specified should be connected to the terminal block for Outside Unit transmission.
Be sure to have authorized electrical engineers do the electric work using special circuits in
accordance with regulations and this installation manual. If power supply circuit has a lack of
capacity or electric work deficiency, it may cause an electric shock or fire.
Be sure to correct the outside unit to earth. Do not connect earth line to any gas pipe, water pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
46 Outside Unit
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Master Slave1 Slave2
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Outdoor units
Outdoor units
Outdoor units
Outdoor units
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
HR
unit
HR
unit
HR
unit
2-core shield cable Multi-core cable
HR
unit
Remote
controller
Remote
controller
Indoor
unit
Indoor
unit
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring
may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure
being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will
strip the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
u Precautions when laying power and ground wiring
Round pressure terminal
Power wire (Ground wire)
Use round pressure terminals for connections to the power terminal block.
When laying ground wiring, you must use round pressure terminals.
• Use the 2-core shield cables for transmission lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate
power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will
be reduced.
Electrical Wiring
ENGLISH
Installation Manual 47
Electrical Wiring
- Unscrew all the screw, pull out the panel.
- Connect the transmission wire between outside unit and indoor unit,
the connection between outside unit and central controller system
pass through the sub PCB for central control.
- When connecting indoor unit with the shield cable, ground at the
grounding screw.
When connecting central controller with the shield cable, ground at
the grounding screw.
- Refer to next page about the distance between main power cable
and communication cable.
Front Panel
Control Box and Wiring Location
48 Outside Unit
Electrical Wiring
Transmission and Power Lines
1) Transmission cable
• Types : shielding wire
• Diameter : over 1.25mm
2
• Maximum allowable temperature: 60°C(140°F)
• Maximum allowable line length: under 300 m(984ft)
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Use wires of size : 1.0 ~ 1.5 mm
2
• Insulation material : PVC
4) Separation of transmission and power lines
• If transmission and power lines are run alongside each other then there is a strong likelihood of operational
faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic cou-
pling.
The tables below indicates our recommendation as to appropriate spacing of transmission and power lines
where these are to be run side by side
Note:
1. The figures are based on assumed length of parallel cabling up to 100m. For length in excess of 100m
the figures will have to be recalculated in direct proportion to the additional length of line involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the
table should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when grouping
various lines together for introduction into the conduits
• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same
• In the same way, when grouping the lines power and signal lines should not be bunched together.
Current capacity of power line Spacing
10A 300mm(11-13/16 inch)
50A 500mm(19-11/16 inch)
100A 1,000mm(39-3/8 inch)
Exceed 100A 1,500mm(59-1/16 inch)
100V or more
If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing of the
apparatus must be carried out by a qualified person.
ENGLISH
Installation Manual 49
Electrical Wiring
1. Use a separate power supply for the Outside Unit and Indoor Unit.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceed-
ing with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank
thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop
more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outside use should not be lighter than polychloroprene
sheathed flexible cord.
6. Do not install an individual switch or electrical outlet to disconnect each of indoor unit separately from
the power supply.
u Wiring of Main Power Supply and Equipment Capacity
• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring reg-
ulations and guidance of each electric power company.
• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If con-
nections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include
some amount of direct current.
• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may
cause an electric shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large
capacity may cause a malfunction of unit or fire.
50 Outside Unit
Electrical Wiring
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 208/230V
3 Phase 3 Wires
Power supply
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch fuse)
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
(Main Switch)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B) 3(A) 4(B)
HR unit
Pull box(installer option)
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-
uct is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
ENGLISH
Installation Manual 51
Electrical Wiring
u Example Connection of Communication Cable
2 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equip-
ment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch)
Power supply switch
(Switch)
Slave
Master
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
HR unit
HR unit
Pull box(installer option)
HR unit
HR unit
Pull box(installer option)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
52 Outside Unit
Electrical Wiring
u Example Connection of Communication Cable
3 Outdoor Units
HR unit
HR unit
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch)
Master
Slave1
Slave2
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
Power supply switch
(Switch)
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 208/230V
(Main Switch)
Pull box(installer option)
Pull box(installer option)
HR unit
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equip-
ment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
ENGLISH
Installation Manual 53
Electrical Wiring
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 460V
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch fuse)
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
(Main Switch)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B) 3(A) 4(B)
Pull box(installer option)
HR unit
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-
uct is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
54 Outside Unit
Electrical Wiring
u Example Connection of Communication Cable
2 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equip-
ment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Power supply switch
(Switch fuse)
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is supplied to
Each outdoor unit individually.
Power supply switch
(Switch fuse)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
Master
Slave
Power supply switch
(Switch fuse : ELCB)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
HR unit
HR unit
Pull box(installer option)
HR unit
HR unit
Pull box(installer option)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
ENGLISH
Installation Manual 55
Electrical Wiring
u Example Connection of Communication Cable
3 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equip-
ment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
HR unit
HR unit
Power supply switch
(Switch fuse)
Power supply switch
(Switch fuse)
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
Master
Slave1
Slave2
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
Pull box(installer option)
Pull box(installer option)
HR unit
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
56 Outside Unit
Electrical Wiring
u Example Connection of Communication Cable
[BUS type]
• Connection of communication cable must be installed like below figure between indoor unit to outside unit.
[STAR type]
• Abnormal operation can be caused by communication defect, when connection of communication cable is installed like
below figure(STAR type).
External wiring
External wires should be connected as follows.
① Main power cable
② Communication cable
③ Solenoid valve control cable (option)
flow switch communication cable (option)
ڸ
ڹ
ں
Electrical Wiring
ENGLISH
Installation Manual 57
Connection method of the connecting cable (Example)
1. Make a hole appropriate for the passage of connection cable through on cap by tool.
2. After knocking out the holes, we recommend you paint the edges and areas around the edges using
the repair paint to prevent rusting
3. Pass the connecting cable through the hole.
4. Properly connect the cable on the terminal block.
5. Fix the connection cable with the cord clamp providing on the unit not to have strain at the terminal.
6. Finally, Fix the cap to the conduit panel.
WARNING
• Loose wiring may cause the terminal to overheat or result in unit malfunction.
• A fire hazard may also exist.
• Therefore, be sure all wiring is tightly connected.
Conduit
Model name
ARWB072BA2 ARWB144BA2 ARWB216BA2 ARWB288BA2 ARWB360BA2 ARWB432BA2
AWG
1064222
Conduit (inch)
2-Jan 1 1/4/01 1/4/01 1/4/01 1/4/01
Knockout Diameter (inch)
8-Jul 1-23/64 1-23/32 1-23/32 1-23/32 1-23/32
Model name
ARWB096DA2 ARWB192DA2 ARWB290DA2 ARWB390DA2 ARWB480DA2 ARWB580DA2
AWG
14126644
Conduit (inch)
2-Jan 2-Jan 1 1 1/4/01 1/4/01
Knockout Diameter (inch)
8-Jul 8-Jul 1-23/64 1-23/64 1-23/32 1-23/32
58 Outside Unit
HR Unit PCB
HR Unit PCB
Switch for setup of HR Unit
1. Main function of SW02M
ON S/W Selection
No.1
Method for addressing valves of an HR unit (Auto/Manual)
No.2 Model of HR unit
No.3 Model of HR unit
No.4 Valve group setting
No.5 Valve group setting
No.6 Valve group setting
No.7 Use only in factory production (preset to “OFF”)
No.8 Use only in factory production (preset to “OFF”)
SW02M
1) Selection of the method for addressing valves of an HR unit (Auto/Manual)
Auto
Manual
SW02M
(Dip switch for setup of
the function of HR unit)
SW03M SW04M
SW01M/SW03M/SW04M
(Switch for manual valve
addressing)
SW01M
SW05M
(Switch for
addressing
HR unit)
7-SEG
#1 valve housing
#1 cooling valve LED(green)
#1 heating valve LED(red)
#4 valve housing
Switch No.1 OnSwitch No.1 Off
ENGLISH
Installation Manual 59
HR Unit PCB
2) Selection of the model of the HR unit
h Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory.
1
2
3
1
2
1
3
2
4
(For 2 rooms)
PRHR020A
(For 3 rooms)
PRHR030A
(For 4 rooms)
PRHR040A
1 room
Connected
2 rooms
Connected
3 rooms
Connected
4 rooms
Connected
Initial
Setting
WARNING
• If you want to use a PRHR030A for 2 rooms HR unit after closing the 3rd pipes, set the dip switch for 2 rooms HR unit.
• If you want to use a PRHR030A for 3 rooms HR unit after closing the 4th pipes, set the dip switch for 3 rooms HR unit.
• If you want to use a PRHR040A for 2 rooms HR unit after closing the 3rd and 4th pipes, set the dip switch for 2 rooms HR unit.
• The unused port must be closed with a copper cap, not with a plastic cap.
60 Outside Unit
HR Unit PCB
3) Setting the Valve Group.
No.1, 2 Valve
/
No.3, 4 Valve
Control
No.3, 4 Valve
Control
DIP S/W setting
No.2, 3 Valve
Control
No.1, 2 Valve
Control
Not control
Example
Indoor Unit
Indoor Unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Large capacity indoor unit
Large capacity indoor unit
Large capacity indoor unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Models Gas Pipe Liquid pipe
ARBLN03321
[Unit:mm(inch)]
I.D19.05(3/4)
I.D19.05(3/4)
I.D19.05(3/4)
O.D19.05(3/4)
O.D19.05(3/4)
I.D12.7(1/2)
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D22.2(7/8)
I.D25.4(1)
I.D25.4(1)
I.D12.7(1/2)
I.D12.7(1/2)
I.D12.7(1/2)
I.D6.35(1/4)
I.D9.52(3/8)
I.D9.52(3/8)
I.D9.52(3/8)
I.D6.35(1/4)
I.D28.58(1-1/8)
O.D25.4(1)
Note:
If the large capacity indoor units are installed, below Y branch pipe should be used
] Y branch pipe
ENGLISH
Installation Manual 61
HR Unit PCB
2. SW05M (Rotary S/W for addressing HR unit)
Must be set to '0' when installing only one HR unit.
When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'.
Ex) Installation of 3 HR units
3. SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)
- Used in manual addressing of the valve in the HR unit
- Set the address of the valve of the HR unit to the central control address of the connected indoor unit.
- SW01M: selection of the valve to address
SW03M: increase in the digit of 10 of valve address
SW04M: increase in the last digit of valve address
- Prerequisite for manual valve addressing : central control address of each indoor unit must be preset differ-
ently at its wired remote control.
1
2
3
4
1
2
3
4
1
2
3
4
34 34 3 4
S/W No. Setup
No.1 Manual addressing of valve #1
No.2 Manual addressing of valve #2
No.3 Manual addressing of valve #3
No.4 Manual addressing of valve #4
SW03M Increase in the digit of 10 of valve address
SW04M Increase in the last digit of valve address
SW01M
SW03M
SW04M
62 Outside Unit
HR Unit PCB
1) Auto addressing for indoor unit
• The address of indoor units would be set by
auto addressing
1) Wait for 3 minutes after applying power supply
(Master and Slave Outdoor unit, Indoor unit).
2) Press the switch of the outdoor unit (SW02V)
for 5 seconds.
3) A "88" is indicated on 7-segment LED of the
outdoor unit PCB.
4) For completing addressing, 2~7 minutes are
required depending on numbers of indoor unit
connection set.
5) Numbers of inddor unit connection set whose
addressing is completed are indicated for
30seconds on 7-segment LED of the oudoor
unit PCB.
6) After completing addressing, address of each
indoor unit is indicated on the wired remote
control display window. (CH01, CH02, CH03,
........ CH06: Indicated as numbers of indoor
unit connection set).
1) Auto addressing for indoor unit
2) Auto pipe detection
3) Manual pipe detection(Execute in case of Auto pipe detection failure)
• Turn off all the indoor units before auto addressing.
If indoor unit is operated, auto addressing would not be completed.
Flow chart for auto addressing for indoor units and HR units
SW01B
(DIP S/W)
SW02B
(DIP S/W)
7 - Segment
SW02V
Auto addressing
2) Auto pipe detection
• Turn No.1 of SW02M of HR unit PCB off.
• Confirm that the setting of No.2, 3 of SW02M corresponds with the number of indoor units.
• Reset the power of HR unit PCB
• Turn off the No.5 DIP S/W of main unit PCB when outdoor temperature is below 15°C
• Turn on the No.5 DIP S/W of main unit PCB when outdoor temperature is over 15°C
• Reset the power of outdoor unit.
• Wait for 3minutes.
• Press SW01V of the outdoor unit main PCB for 5 Seconds.
• The number of connected HR unit is displayed.
Ex) In case of installing four HR units : 04
• Operated after 88 is displayed on 7-SEG of the outdoor unit main PCB.
• Pipe detection proceed.
• 5~30 minutes are required depending on the number of the indoor units and outdoor temperature.
• The number of the indoor units installed is displayed on 7-SEG of the outdoor unit main PCB for about 1
minute
(For a HR unit, the number of the indoor units connected to each HR unit is displayed.
• '200' is displayed in case of auto pipe detection error, and auto detection is completed after '88' is disap-
peared.
h Auto pipe detection function : the function that sets connection relationship automatically between the indoor
unit and HR unit.
ENGLISH
Installation Manual 63
HR Unit PCB
3) Manual pipe detection
• Enter the central control address into each indoor unit using its wired remote control.
• Turn No.1 of SW02M of HR unit PCB on.
• Reset the power of HR unit PCB.
• On the HR unit PCB, manually set address of each valve of the HR unit to the central control address of the
indoor unit connected to the valve.
• Turn No.6 of SW03M of outdoor unit PCB on.
• Reset the power of outdoor unit PCB.
• The number of the indoor unit installed is displayed after about 5 minutes.
Ex) HR ‡ The number of the indoor
• Turn No.6 of SW03M of outdoor unit PCB off.
• Reset the power of outdoor unit PCB, HR unit.
• Manual pipe detection is completed
WARNING
• In case that central controller is not installed, remain the address data after installer sets central
control address as he wants
• In case that central controller is installed, there would be central control address in wired remote
control of indoor unit.
• In this case, set the HR unit manual pipe address according to central control address of indoor unit.
• Pipe which is not connected with indoor unit should be set different address with pipe Connected
with indoor unit.
(If addresses are piled up, corresponding valve is not working.
• If you want to change the setting of manual pipe, you should do it on HR unit PCB.
• If an error occurred, it means that manual pipe setting is not completed.
WARNING
1. Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB
is replaced.
• Operation error occurs unless power is applied to the indoor and HR units.
2. Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are
different.
3. When auto pipe detection fails, complete it with manual pipe detection (see Manual pipe detection).
4. When auto pipe detection addressing is completed normally, manual pipe detection is not
required.
5. If you want to do auto pipe detection again after auto pipe detection fails, do after reset of outdoor
unit by all means.
64 Outside Unit
HR Unit PCB
'88' is displayed on outdoor unit main PCB and
HRunit PCB
Completion of auto addressing
The number of the indoor units connected is
displayed at 7-SEG of the outdoor unit main PCB
after 2~7 minutes
The number of HR units connected is displayed
at 7-SEG of the outdoor unit main PCB
Are the number
of indoor units connected to the outdoor unit
wiring and displayed one equal?
Turn HR unit , indoor unit and outdoor unit on in
the order named.
Wait for 3 minutes
Check power and communication wiring between
outdoor, HR and indoor units
Retry indoor unit auto-addressing after checking
trouble
Incompletion of auto addressing
Press SW02V of the outdoor unit main PCB for 5
seconds
Yes
No
Flow chart of auto-addressing for indoor units
ENGLISH
Installation Manual 65
HR Unit PCB
Completion of auto pipe detection
❈ It is possible to be generated mode changing noise of
heating and cooling which is normal.
There is no mode changing noise at normal operation.
Are the number
of indoor units connected to the
outdoor unit wiring and displayed
one equal?
Reset the power of HR unit PCB
Confirm that the setting of No.2, 3 of
SW02M corresponds with the number of
indoor units.
Confirm the No.5 DIP S/W of SW03M of
outdoor PCB
Outdoor temperature is over 15C(86F) : ON
Outdoor temperature is below 15C(86F) : OFF
In case of changing SW03M S/W of
outdoor unit, reset the power of outdoor
unit main PCB
Press SW01V of the outdoor unit main PCB
for 5 seconds
88' is displayed on 7-SEG of the outdoor
unit main PCB
Outdoor unit is operated for 5~30 minues.
The number of indoor units detected is
displayed for 30 seconds on the outdoor
unit PCB after outdoor unit stopped
Display error on outdoor unit PCB
Display error on HR unit PCB
Outdoor unit PCB : HR → HR unit
number → Valve number
HR unit : '200'
Check the HR unit and indoor unit
Pipe detection error occur after 30
seconds.
Check the installation of pipe of
outdoor, indoor, HR unit
Incompletion of auto pipe detection
Retry auto pipe detection after
checking trouble
Is the pipe
setting condition
satisfied during the operation of
indoor unit?
Confirmation of indoor unit address setting
Turn No.1 of SW02M of HR unit PCB off.
Wait for 3 minutes
NO
NO
YES
YES
Flow chart of auto addressing for pipe detection
66 Outside Unit
HR Unit PCB
Completion of manual pipe detection
Turn No.6 of SW03M of outdoor unit PCB
off.
Reset the power of HR unit PCB.
Enter the central control address into
each indoor unit using its wired remote
control.
On the HR unit PCB, manually set address
of each valve of the HR unit to the central
control address of the indoor unit
connected to the valve.
Reset the power of outdoor unit PCB.
Wait for about 5 minutes.
The number of the indoor units installed is
displayed.
Ex)HR
→
The number of the indoor
Check the central control address of
indoor and HR unit.
Make sure that reset the outdoor unit
power when changing the central
control unit
Are the number
of indoor units connected to the
outdoor unit and displayed one
equal?
Execute in case of Auto pipe detection
failure
Turn No.1 of SW02M of HR unit PCB on.
Turn No.6 of SW03M of outdoor unit PCB
on.
NO
YES
Flow chart of manual addressing for pipe detection
ENGLISH
Installation Manual 67
HR Unit PCB
Example of manual valve addressing
(In case that an indoor unit of central control address "11" is connected to a valve #1 of an
HR unit)
• Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differ-
ently at its wired remote control
- Above setup must be done for all HR unit valves.
- The valve that is not connected with any indoor unit should be addressed with any other number than used
address numbers of the valves connected with indoor units.
(The valves does not work if the address numbers are same.)
• Operation: None
• Display: None
No.
1
2
3
4
5
Display and setup Setup and Contents
• Operation: Turn dip S/W No.1 on to address valve #1
• Display: Existing value saved in EEPROM is displayed in
7-SEG.
• Operation: Set the digit of 10 to the number in Group High data
of the wired remote control connected to the corresponding
indoor unit to the valve #1 by pressing left tack S/W.
• Display: Digit increasing with the times of pressing tack S/W is
displayed in left 7-SEG
• Operation: Set the digit of 1 to the number in Group Low data
of the wired remote control connected to the corresponding
indoor unit to the valve #1 by pressing right tack S/W.
• Display: Digit increasing with the times of pressing tack S/W is
displayed in right 7-SEG
• Operation: Turn dip S/W No.1 off to save the address of
valve #1
• Display: "11" displayed in 7-SEG disappears
SW01M SW03M SW04M
SW01M SW03M SW04M
SW01M SW03M
SW04M
SW01M SW03M
SW04M
SW01M SW03M SW04M
68 Outside Unit
HR Unit PCB
Example of checking valve address
(In case that an indoor unit of central control address "11" is connected to a valve #1 of an
HR unit)
• Operation: Turn dip S/W No.1 on.
• Display: "11" is displayed in 7-SEG
No.
1
2
Display and Setup Setup and Contents
• Operation: Turn dip S/W No.1 on.
• 7-SEG disappeared
SW01M SW03M
SW01M SW03M
Identification of Manual Valve ID (Address)
• Operation: more than 2 dip switches turned on.
• Display: "Er" is displayed in 7-SEG
No.
1
Display and Setup Setup and Contents
SW01M SW03M
ENGLISH
Installation Manual 69
HR Unit PCB
Dip switch setting
1. Location of setting switch
2. Dip switch setting
1) Set the dip switch and turn on the power of the outside unit to check whether the set value is correctly
entered in the 7 segment.
2) This function is shown for only 2 seconds after the power is connected.
n Check outside unit setting
• The number on the 7 segment is displayed in order after the power is connected.
• This number represents the setting condition.
n Mode code
If the applicable dip switch is not set correctly,
the product may not operate properly.
SW01B
SW02B
7 segment
SW01B
1234567
ON
SW02B
1234567
ON
Order Number Item
1 - Model code
2 - Total capacity(HP)
3 2 Heat pump model
4 25 Normal mode display (If the dip switch is set incorrectly, it is not displayed.)
5 132 Model type (Heat recovery)
220V 460V
Refrigerant
Model Code Capacity (HP) Model Code Capacity (HP)
146 8 148 10
R410A
147 16 149 20
147, 146 24 149, 148 30
147, 147 32 149, 149 40
147, 147, 146 40 149, 149, 148 50
147, 147, 147 48 149, 149, 149 60
70 Outside Unit
HR Unit PCB
n Master Outside Setting
SW01B Setting SW02B Setting Remark
Normal mode at shipping
factory
1234567
ON
1234567
ON
n Slave outside Setting (1 unit: master outside)
Function SW01B Setting SW02B Setting Remark
Standard mode at shipping
factory
Standard
Short Pipe Length
Long Pipe Length
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
SW01B Setting SW02B Setting Remark
Normal mode at shipping
factory
Slave1 outside setting
(at the 2units)
Slave2 outside setting
(at the 3units)
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
ENGLISH
Installation Manual 71
HR Unit PCB
n After operating the dip switch to set the additional function, you must reset the power of the main PCB to
reflect the changed function. (After recovering the dip switch to cancel the additional function, you must
reset the power of the main PCB to reflect the change.)
n If the dip switch is not set accurately, it can have excessive load on the product operation.
Set the dip switch properly.
Function SW01B Setting SW02B Setting Remark
Standard mode at shipping
factory
longest Pipe
Length
Forced Oil Return
1234567
ON
1234567
ON
1234567
ON
1234567
ON
For water pipe Solenoid
Valve 208/230V power
Use this mode when tem-
perature of circulation inlet
water is under 10°C (50°F)
(You should use an anti
freeze)
You should install the vari-
able water flow valve con-
trol kit before using this
mode.
Vacuum Mode
Water Pipe
Solenoid Valve
208/230V
Functions
Ground source
mode
Variable water
Flow Control
Mode
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
1234567
ON
Dry contact
Mode
1234567
ON
1234567
ON
72 Outside Unit
HR Unit PCB
• The address of indoor units would be set by auto addressing
1) Wait for 3 minutes after applying power supply (master and
sub outside unit, indoor unit).
2) Press the switch of the outside unit (SW02V) for 5 seconds.
3) A "88" is indicated on 7-segment LED of the outside unit
PCB.
4) For completing addressing, 2~7 minutes are required
depending on numbers of indoor unit connection set.
5) Numbers of indoor unit connection set whose addressing is
completed are indicated for 30seconds on 7-segment LED
of the outside unit PCB.
6) After completing addressing, address of each indoor unit is
indicated on the wired remote control display window.
(CH01, CH02, CH03, ............. CH06: Indicated as numbers
of indoor unit connection set.)
Indoor unit auto addressing
CAUTION
- In replacement of the indoor unit PCB, always perform auto address setting again.
If power supply is not applied to the indoor unit, operation error occurs.
Auto addressing is only possible on the main PCB
Auto addressing has to be performed after 3 minutes to improve communication.
u The Procedure of Automatic Addressing
• Auto addressing setting end"
Numbers of indoor unit connection set whose
addressing is completed are indicated for 30seconds
on 7-segment LED after completing setting
Indoor address number is displayed on wired remote control or
indoor unit display window. It is not an error message, will
disappeared when on/off button is pressed on remote control "
ex) Display of 01, 02, ..., 15 means connection of 15 indoor
units and auto addressing is completed normally.
Auto addressing start
Waiting 3 minutes
Power On
Press SW02V for 5 sec.
7-segment LED = 88
Don't Press SW02V
Waiting about 2~7 minutes
7-segment LED
OK
YES
NO Check the connections"
of transmission line
= 88
ENGLISH
Installation Manual 73
HR Unit PCB
Group Number setting
Group Number setting for Indoor Units
① Confirm the power of whole system(Indoor Unit, Outside Unit) is OFF, otherwise turn off.
② The transmission lines connected to INTERNET terminal should be connected to central control of Outside
unti with care for their polarity( A ’ A, B ’ B )
③ Turn the whole system on.
④ Set the group and Indoor Unit number with a wired remote control.
⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.
Terminal block on the main PCB
SODU IDU INTERNET DRY1 DRY2
B
A
B(D) A(C)
GND 12V
B
A
BA
Group recognizing the simple central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
Outside Units
74 Outside Unit
HR Unit PCB
Cool and Heat Selector Installation and Connection
• Connect wires as below figure at the hole of backside of Outside Unit Dry Contact.
• Insert the wire in the connection hole pushing the "Push" button.
• Setting Main PCB Dip SW of Master Outside Unit.
Without Cool/Heat Selector Installation and Connection
In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor
Cool/Heat Selector in field.
Connect signal terminal block as below figure and description.
- How to set mode without Cool/Heat Selector
• Cooling Mode Setting
¿ ‘ GND Connection
¡ ‘ Off (Open)
• Heating Mode Setting
¿ ‘ GND Connection
¡ ‘ GND Connection
• Fan/ All OFF Mode Setting
¿ ‘ Off (Open)
¡ ‘ GND Connection
Mode Change
Push Button
Heating
Outside Unit
Cooling
: Developing
1. Fan / OFF
2.
OFF
GND
GND
GND
ENGLISH
Installation Manual 75
Test Run
Test Run
Water supply system test run
• Before executing the test run for the product, you must first test the heat source water system.
The test run for the product must be executed after checking the flow rate and temperature of the heat source
water supplied.
Design the system including cooling tower, boiler, pump etc.
- Check the equipment capacity (Water volume, temperature control range).
Install the water pipe
Connect the water pipe to the inlet/outlet of the product so that the water
can be supplied to the product.
Execute water supply system test run
- The product does not operate but the pump and water supply equipment
will operate to flow the Heat source water to the heat exchanger on the
product side.
- Flow the water to all water piping system to clean any alien particles inside
the pipes and execute an air purge to remove an air within the pipes to
make the water supply smoother.
- Clean all the strainers of water pipe including around outside units.
Execute the test of water supply system without operating the product.
- Check whether outside unit inlet/outlet flow rate complies to the product
specification.
Standard Water volume is 80LPM based on 8HP and 150LPM based on
16HP.
- Check the water supply temperature. whether is OK
After checking the normal condition of the water supply, execute the test run
of the product.
To prevent the freezing of the heat exchanger when the refrigerant is dis-
charged with the water supply blocked, discharge the refrigerant after
draining out around the outside unit.
Equipment design
Water pipe system installation
Water supply system test run
Execute the product test run
Judging whether there is any
problem with the water supply
Water supply pipe and product
connection
76 Outside Unit
Test Run
How to Cope with Abnormal Test Run
Item
Phenomenon
Cause Checkpoint and resolution
Check whether the heat source water supply pump is operating.
Check whether the heat source water supply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Check whether the flow switch is normal condition.
(Flow switch problem, arbitrary control, disconnection etc.)
Check whether heat source water supply pump is operating.
Check whether the heat source water supply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Whether
heat water
is supplied
Heat water not supplied or flow
rate is insufficient (During air con-
ditioning)
CH32
When connecting the flow switch,
heat-sourced water doesn’t flow or
the amount of its flow lacks due to
the checked error related to heat-
sourced water.
CH24
Precaution before test run
1
2
3
4
5
Check whether the air is completely removed and the water supply is flowing smoothly.
Check whether there is any refrigerant leakage of any disconnected or loose communication or power wire, or use
the electric wiring diagram to check the wiring connection condition.
Check whether the power and communication wire are connected.
Check whether the power cable L1, L2, L3 are correctly connected.
Check the insulation resistance with the DB mega tester device (DC 500V) between the power terminal block and
grounding, and check whether it is 2.0MΩ or above when measured.
If the resistance is 2.0MΩ or less, do not operate the product.
Precaution)
- Never check the insulation resistance for the terminal control board.
(The control board can be damaged.)
- If you leave the system turned off right after the installation or for a long period of time, the refrigerant gets accu-
mulated within the compressor and the insulation resistance reduces to less than 2 MΩ. When the insulation
resistance is 2 MΩ or less, turn on the power and let the electricity be supplied to the crank case heater of the
compressor and let the refrigerant including the oil inside the compressor to evaporate.
Then the insulation resistance value will increase to more than 2.0 MΩ.
Check whether the liquid and gas pipes are open.
Precaution when blocking the water cooling type Multi V main power
- While using the product (Air conditioning season/Heating season), always connect the main power of the outside
unit.
- During the test run operation after installing the product or during the operation after blocking the outside unit
main power (Power outage etc.), you must always connect the power 6 hours prior to heating the crank case
heater. If the crank case is not preheated for more than 6 hours with the electric heater, it can cause a burn on
the compressor.
(Heating the bottom part of the compressor with the crank case heater is to evaporate the refrigerant included in
the oil inside the compressor.)
• Always check whether the water supply is flowing smoothly before the test run. (If sufficient amount
of water is not flowing, it can burn the product.)
• During the initial test run after installing the product, leaving the product for more than 3 days or
after replacing the compressor, power must be connected 6 hours prior to the operation to heat the
compressor heater. (If the product is not heated sufficiently, it can burn the product.)
ENGLISH
Installation Manual 77
Test Run
Maintenance of plate type heat exchanger
h When CH24 or CH180 error occurs during the test operation of the heater, the inside of the panel heat exchanger may be
partially frozen and therefore, be sure to get rid of its cause and then, re-operate the device.
(The root cause of partial freezing: The lack of flow of heat-sourced water, suspension of water, lack of cooling medium,
infiltration of foreign substance inside of panel heat exchanger )
As the scales are created in the panel heat exchanger, its efficiency may decrease or damage may occur due to winter-sowing due
to the decrease in its flow.
Due to this reason, regular maintenance is necessary so that the scales shouldn't be created.
1. Before the season of use, check below points.(Once a year)
1) inspection on water quality to check if this is within the standard condition.
2) Clean the strainer.
3) Check if the flow is appropriate.
4) Check if the operation environment is appropriate.(Pressure, flow, output temperature)
2. Below procedure should be abided by in order to clean the panel heat exchanger. (Once every 5 years)
1) Check if the service port is equipped with the water pipe in order to clean the chemical solution.
5% diluted formic acid, citric acid, oxalic acid, acetate acid, phosphoric acid and etc. are appropriate for the chemical solution
for wiping out the scales.(Hydrochloric acid, sulphuric acid, nitric acid and etc. shouldn't be used due to its corrosion.)
2) Be sure to check if the gate valve of inflow/outflow pipe and the valve for outflow pipe are properly closed when cleaning.
3) Connect the water pipe for cleaning with the chemical solvent through the service plug of the pipe and fill up the panel heat
exchanger with 50°C~60°C(122°F~140°F) of cleaning solvent and circulate it with the pump for 2~5 hours. The circulation
time may depend on the temperature of the cleaning solvent or the creation of the scales. Therefore, observe change in the
color of the chemical solvent to set the circulation time for removing the scales.
4) After the circulation of the solvent, extract the solvent inside of the panel heat exchanger and fill up 1~2% of NaOH or NaHCO
3
and then, circulate it for 15~20 minutes to neutralize the heat exchanger.
5) Once the neutralization is completed, clean the inside of the panel heat exchanger with clean water.
Measure the water Ph to check if the chemical solvent is properly removed or not.
6) When using a different kind of chemical solvent in the market, be sure to check if there is any corrosive action to stainless or
copper in advance or not.
7) For details on the cleaning chemical solvent, be sure to consult the specialists of the related corporation.
3. After cleaning, operate the device to see if it works properly once again.
Gate valve(locked)
Service plug
Strainer
Outflow water"
valve(locked)
Gate valve(locked)
Water-cooling"
type multi V
Hose
Pump
[Cleaning the panel heat exchanger]
Screening net
Item
Phenomenon
Cause Checkpoint and resolution
Check whether heat source water supply pump is operating.
Check whether the heat source water supply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Check whether heat source waterr supply pump is operating.
Check whether the heat source watersupply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Whether
heat water
is supplied
Heat water not supplied or flow
rate is insufficient
Heat water not supplied or flow
rate is insufficient (During heat-
ing)
CH34
CH180
78 Outside Unit
Test Run
Daily check/management
Maintenance/Repair checklist
1. Water quality control
The plate type heat exchanger is not structured to be disassembled, cleaned or replaced with parts.
To prevent corrosion or scaling on the plate type heat exchanger, special care must be taken to control the water quality.
Water quality must satisfy the minimum criteria of the reference water quality items.
When anti-corrosion agent or corrosion inhibitor is added, the substance must not have any corrosive effect on stainless
steel and copper.
Even if the circulating water is not contaminated by the external air, it is recommended to empty the water flowing in the
pipe and to resupply the water.
2. Flow rate control
If the flow rate is insufficient, it can cause freezing on the plate type heat exchanger.
Check whether the strainer is clogged or whether the pipe is filled with air and then check the temperature and pressure
difference of the inlet and outlet pipe to check whether the flow rate is insufficient.
If the temperature and pressure difference is above the appropriate level, it means that the flow rate is reduced. In this
case, the operation must immediately be stopped and re-operated when the root cause is resolved. (*If air is trapped in
the pipe, the air must be purged. Air inside the water pipe interferes with the circulation of the heat water supply and can
cause insufficient flow rate or freezing.)
3. Brine density management
When using the brine (Anti-freeze) in the heat water supply, designated type and density must be used. Calcium chloride
brine can cause corrosion on the plate type heat exchanger and must not be used.
If the anti-freeze liquid is left as is, it absorbs the moisture from the air to cause a drop in the density, leading to freezing
of plate type heat exchanger. Therefore minimize the contact surface with the atmosphere and periodically measure the
density of the brine to supplement the brine as needed to maintain the density.
• The above checklist is set based on the minimum period and more frequent checking can be required depending on the operating condition/water quality condition.
• When cleaning the heat exchanger, make sure to take parts out or lock the value so that chemical detergent does not penetrate into the pressure gauge etc.
• When cleaning the heat exchanger, check the connecting part of the water pipes prior to cleaning so that the chemical detergent does not leak.
• After sufficiently mixing the chemical detergent with water, start cleaning.
• Cleaning the heat exchanger is easier at the initial stage and becomes difficult after the scaling has accumulated.
• In areas where the water quality is poor, cleaning is required periodically.
Because chemical detergent has strong acidity, it must be washed off thoroughly with water.
• To check whether it is cleaned well inside, remove the hose and check the inside.
• Purge the air to remove any air inside the water pipe.
• After checking, always check whether the heat water supply is flowing normally flowing before operating the product.
(
●
: Check mark)
Product operating condition
Heat exchanger cleaning (Wash)
Strainer cleaning
Water quality check
Refrigerant leakage check
Indoor unit filter cleaning
Period (Year)
Checkpoint
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
●●●●●●●●●●●●●●●
●● ●
●●●●●●●●●●●●●●●
●●●●●●●●●●●●●●●
● ●
●●●●●●●●●●●●●●●
ENGLISH
Installation Manual 79
Test Run
Self-Diagnosis Function
Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LEDof
outside unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
011 ’ 051 : No.105 error of master unit
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor unit PCB
Malfunction of drain pump
Failing to receive outside unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
In case when the serial number marked on EEPROM of Indoor unit is
0 or FFFFFF
Disconnecting the fan motor connector/Failure of indoor fan motor lock
Master outside unit Variable speed compressor drive IPM error
Slave1 outside unit Variable speed compressor drive IPM error
Slave2 outside unit Variable speed compressor drive IPM error
Master Outdoor Unit Inverter Board Input Current excess (RMS)
Slave2 Outdoor Unit Inverter Board Input Current excess (RMS)
Slave2 outside unit Variable speed compressor drive IPM error
DC voltage is not charged after master outside unit operating relay is
turned on
DC voltage is not charged after slave1 outside unit operating relay is
turned on
DC voltage is not charged after slave2 outside unit operating relay is
turned on
Compressor maintenance by master outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of master outside unit
Compressor maintenance by slave1 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave1 outside unit
Compressor maintenance by slave2 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave2 outside unit
Master outside unit input voltage of 290V or above or 173V or less
Slave1 outside unit input voltage of 290V or above or 173V or less
Slave2 outside unit input voltage of 290V or above or 173V or less
0 1 - Air temperature sensor of indoor unit
0 2 - Inlet pipe temperature sensor of indoor unit
03-
Transmission error : wired remote controller ÷
indoor unit
0 4 - Drain pump
0 5 - Transmission error : outside unit ÷ indoor unit
0 6 - Outlet pipe temperature sensor of indoor unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
211
Master outside unit Variable speed compressor
IPM fault
212
Slave1 outside unit Variable speed compressor
IPM fault
2 1 3 Slave2 outside unit Variable speed compressor
IPM fault
221
Master Inverter Board Input Over
Current(RMS) of Master Outdoor Unit
222
Slave1 Inverter Board Input Over
Current(RMS) of Master Outdoor Unit
223
Slave2 Inverter Board Input Over
Current(RMS) of Master Outdoor Unit
231
Master outside unit Variable speed compressor
DC link under-voltage
232
Slave1 outside unit Variable speed compressor
DC link under-voltage
233
Slave2 outside unit Variable speed compressor
DC link under-voltage
2 4 1 Master outside unit high pressure switch
2 4 2 Slave1 outside unit high pressure switch
2 4 3 Slave2 outside unit high pressure switch
251
Master outside unit input voltage over-volt-
age/under-voltage
252
Slave1 outside unit input voltage over-volt-
age/under-voltage
253
Slave2 outside unit input voltage over-volt-
age/under-voltage
Display
Error item Root cause of error
number
Indoor unitOutside unit
Initial operation failure due to master outside unit Variable speed com-
pressor error
Initial operation failure due to slave1 outside unit Variable speed com-
pressor error
Initial operation failure due to slave2 outside unit Variable speed com-
pressor error
Master PSC/PFC Communication error
Slave1 PSC/PFC Communication error
Slave2 PSC/PFC Communication error
Compressor turned Off due to master outside unit inverter DC voltage
over-charge
Compressor turned Off due to slave1 outside unit inverter DC voltage
over-charge
Compressor turned Off due to slave2 outside unit inverter DC voltage
over-charge
Master outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Slave1 outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Slave2 outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Compressor turned off due to master outside unit inverter CT under-
current
Compressor turned off due to slave outside unit inverter CT under-cur-
rent
Compressor turned off due to slave1 outside unit inverter CT under-
current
Compressor turned off due to master outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of master outside unit
Compressor turned off due to slave1 outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of slave1 outside unit
Compressor turned off due to slave2 outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of slave2 outside unit
Compressor turned off due to master outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to slave1 outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to slave2 outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to master outside unit high pressure over-rise
Compressor turned off due to slave1 outside unit high pressure over-rise
Compressor turned off due to slave2 outside unit high pressure over-rise
Compressor turned off due to master outside unit low pressure over-
drop.
Compressor turned off due to slave1 outside unit low pressure over-drop.
Compressor turned off due to slave2 outside unit low pressure over-drop.
Master outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
Slave1 outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
Slave2 outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
Master outside unit Variable speed compressor current detection (CT)
sensor disconnection or short circuit
261
Master outside unit Variable speed compressor
operation failure error
262
Slave1 outside unit Variable speed compressor
operation failure error
263
Slave2 outside unit Variable speed compressor
operation failure error
2 7 1 Master PSC/PFC Fault error
2 7 2 Slave1 PSC/PFC Fault error
2 7 3 Slave2 PSC/PFC Fault error
281
Master outside unit inverter DC link over-volt-
age error
282
Slave1 outside unit inverter DC link over-volt-
age error
283
Slave2 outside unit inverter DC link over-volt-
age error
291
Master outside unit Variable speed compressor
over-current
292
Slave1 outside unit Variable speed compressor
over-current
293
Slave2 outside unit Variable speed compressor
over-current
311
Master outside unit inverter CT under-current
error
312
Slave outside unit inverter CT under-current
error
313
Slave1 outside unit inverter CT under-current
error
321
Master outside unit Variable speed compressor
discharge temperature over-rise
322
Slave1 outside unit Variable speed compressor
discharge temperature over-rise
323
Slave2 outside unit Variable speed compressor
discharge temperature over-rise
331
Master outside unit Fixed speed compressor
discharge temperature over-rise
332
Slave1 outside unit Fixed speed compressor
discharge temperature over-rise
333
Slave2 outside unit Fixed speed compressor
discharge temperature over-rise
3 4 1 Master outside unit high pressure over-rise
3 4 2 Slave1 outside unit high pressure over-rise
3 4 3 Slave2 outside unit high pressure over-rise
351
Master outside unit low pressure over-drop.
3 5 2 Slave1 outside unit low pressure over-drop.
3 5 3 Slave2 outside unit low pressure over-drop.
391
Master Communication error between Master
outside unit PFC and inverter board
392
Slave1 Communication error between Master
outside unit PFC and inverter board
393
Slave2 Communication error between Master
outside unit PFC and inverter board
401
Master outside unit Variable speed compressor
CT sensor error
80 Outside Unit
Test Run
Display
Error item Root cause of error
number
Outside unit
ENGLISH
Installation Manual 81
Test Run
Display
Error item Root cause of error
number
Slave1 outside unit Variable speed compressor current detection (CT)
sensor disconnection or short circuit
Slave2 outside unit Variable speed compressor current detection (CT)
sensor disconnection or short circuit
Master outside unit Variable speed compressor discharge temperature
sensor disconnection or short circuit
Slave1 outside unit Variable speed compressor discharge temperature
sensor disconnection or short circuit
Slave2 outside unit Variable speed compressor discharge temperature
sensor disconnection or short circuit
Master outside unit under-voltage sensor disconnection or short circuit
Slave1 outside unit under-voltage sensor disconnection or short circuit
Slave2 outside unit under-voltage sensor disconnection or short circuit
Master outside unit over-voltage sensor disconnection or short circuit
Slave1 outside unit over-voltage sensor disconnection or short circuit
Slave2 outside unit over-voltage sensor disconnection or short circuit
Master outside unit air temperature sensor disconnection or short cir-
cuit
Slave1 outside unit air temperature sensor disconnection or short cir-
cuit
Slave2 outside unit air temperature sensor disconnection or short cir-
cuit
Master outside unit heat exchange temperature sensor (A) disconnec-
tion or short circuit
Slave1 outside unit heat exchange temperature sensor (A) disconnec-
tion or short circuit
Slave2 outside unit heat exchange temperature sensor (A) disconnec-
tion or short circuit
Master outside unit suction temperature sensor disconnection or short
circuit
Slave1 outside unit suction temperature sensor disconnection or short
circuit
Slave2 outside unit suction temperature sensor disconnection or short
circuit
Master outside unit Fixed speed compressor discharge temperature
sensor disconnection or short circuit
Slave1 outside unit Fixed speed compressor discharge temperature
sensor disconnection or short circuit
Slave2 outside unit Fixed speed compressor discharge temperature
sensor disconnection or short circuit
Master outside unit Plate type heat exchanger temperature sensor dis-
connection or short circuit
Slave1 outside unit Plate type heat exchanger temperature sensor dis-
connection or short circuit
Slave2 outside unit Plate type heat exchanger temperature sensor dis-
connection or short circuit
Master out side unit IGBT temperature sensor disconnection or short
circuit
Slave1 out side unit IGBT temperature sensor disconnection or short
circuit
Slave2 out side unit IGBT temperature sensor disconnection or short
circuit
Master outside unit power line phase missing
Slave1 outside unit power line phase missing
Slave2 outside unit power line phase missing
402
Slave1 outside unit Variable speed compressor
CT sensor error
403
Slave2 outside unit Variable speed compressor
CT sensor error
411
Master outside unit Variable speed compressor
discharge temperature sensor error
412
Slave1 outside unit Variable speed compressor
discharge temperature sensor error
413
Slave2 outside unit Variable speed compressor
discharge temperature sensor error
4 2 1 Master outside unit under-voltage sensor error
4 2 2 Slave1 outside unit under-voltage sensor error
4 2 3 Slave2 outside unit under-voltage sensor error
4 3 1 Master outside unit over-voltage sensor error
4 3 2 Slave1 outside unit over-voltage sensor error
4 3 3 Slave2 outside unit over-voltage sensor error
441
Master outside unit air temperature sensor
error
442
Slave1 outside unit air temperature sensor
error
443
Slave2 outside unit air temperature sensor
error
451
Master outside unit heat exchange temperature
sensor (A) error
452
Slave1 outside unit heat exchange temperature
sensor (A) error
453
Slave2 outside unit heat exchange temperature
sensor (A) error
461
Master outside unit suction temperature sensor
error
462
Slave1 outside unit suction temperature sensor
error
463
Slave2 outside unit suction temperature sensor
error
471
Master outside unit Fixed speed compressor
discharge temperature sensor error
472
Slave1 outside unit Fixed speed compressor
discharge temperature sensor error
473
Slave2 outside unit Fixed speed compressor
discharge temperature sensor error
481
Master outside unit Plate type heat exchanger
temperature sensor error
482
Slave1 outside unit Plate type heat exchanger
temperature sensor error
483
Slave2 outside unit Plate type heat exchanger
temperature sensor error
491
Master outside unit IGBT temperature sensor
error
492
Slave1 outside unit IGBT temperature sensor
error
493
Slave2 outside unit IGBT temperature sensor
error
5 0 1 Master outside unit 3 phase power missing
5 0 2 Slave1 outside unit 3 phase power missing
5 0 3 Slave2 outside unit 3 phase power missing
Outside unit
82 Outside Unit
Test Run
Display
Error item Root cause of error
number
Excessive connection of indoor unit connection display value (Different
from outside unit)
When the inverter controller signal is not received from the master out-
side unit inverter controller
When the inverter controller signal is not received from the slave1 out-
side unit inverter controller
When the inverter controller signal is not received from the slave2 out-
side unit inverter controller
When the indoor unit control signal is not received from the master out-
side unit controller
Master outside unit 3 phase power reverse phase connection
Slave1 outside unit 3 phase power reverse phase connection
Slave2 outside unit 3 phase power reverse phase connection
Master Failing to receive inverter contoroller signal at Master Outdoor
Unit controller
Slave1 Failing to receive inverter contoroller signal at Master Outdoor
Unit controller
Slave2 Failing to receive inverter contoroller signal at Master Outdoor
Unit controller
Mixing Installation of Old Sub Outdoor Unit and New Slave Outdoor
Unit
When the dip switch(No.8) setting is different between master and
slave outside unit
Master outside unit inverter PCB EEPROM ACCESS error
Slave1 outside unit inverter PCB EEPROM ACCESS error
Slave2 outside unit inverter PCB EEPROM ACCESS error
Master outside unit inverter IGBT when the temperature rises above
110 ℃
Slave1 outside unit inverter IGBT when the temperature rises above
110 ℃
Slave2 outside unit inverter IGBT when the temperature rises above
110 ℃
Master outside unit inverter IGBT temperature sensor disconnection or
short circuit
Slave1 outside unit inverter IGBT temperature sensor disconnection or
short circuit
Slave2 outside unit inverter IGBT temperature sensor disconnection or
short circuit
Master outside unit static speed CT sensor disconnection or short cir-
cuit
Slave1 outside unit static speed CT sensor disconnection or short cir-
cuit
Slave2 outside unit static speed CT sensor disconnection or short cir-
cuit
Master Outdoor Unit PFC CT Sensor open or short
Slave1 Outdoor Unit PFC CT Sensor open or short
Slave2 Outdoor Unit PFC CT Sensor open or short
Master outside unit inverter PCB input instant over-current (Peak)
exceeded
511
Over-capacity (Indoor unit capacity sum is
excessive) connection
521
Communication error with master outside unit
inverter controller
522
Communication error with slave1 outside unit
inverter controller
523
Communication error with slave2 outside unit
inverter controller
53-
Communication error with master outside unit
controller and indoor unit
541
Master outside unit 3 phase power reverse
phase
542
Slave1 outside unit 3 phase power reverse
phase
543
Slave2 outside unit 3 phase power reverse
phase
571
Master Communication error between Master
outside unit inverter controller
572
Slave1 Communication error between Master
outside unit inverter controller
573
Slave2 Communication error between Master
outside unit inverter controller
591
Mixing Installation of Sub Outdoor Unit
59-
Wrong setting between master and slave out-
side unit
601
Master outside unit inverter PCB EEPROM
error
602
Slave1 outside unit inverter PCB EEPROM
error
603
Slave2 outside unit inverter PCB EEPROM
error
621
Master outside unit inverter IGBT over-rise
error
622
Slave1 outside unit inverter IGBT over-rise
error
623
Slave2 outside unit inverter IGBT over-rise
error
651
Master outside unit inverter IGBT temperature
sensor error
652
Slave1 outside unit inverter IGBT temperature
sensor error
653
Slave2 outside unit inverter IGBT temperature
sensor error
701
Master outside unit static speed CT sensor
error
702
Slave1 outside unit static speed CT sensor
error
703
Slave2 outside unit static speed CT sensor
error
711
Master PFC CT Sensor Error of Master
Outdoor Unit
712
Slave1 PFC CT Sensor Error of Master
Outdoor Unit
713
Slave2 PFC CT Sensor Error of Master
Outdoor Unit
731
Master outside unit inverter PCB input instant
over-current (Peak)
Outside unit
ENGLISH
Installation Manual 83
Test Run
Display
Error item Root cause of error
number
Slave1 outside unit inverter PCB input instant over-current (Peak)
exceeded
Slave2 outside unit inverter PCB input instant over-current (Peak)
exceeded
When the master outside unit inverter PCB input current is different
When the slave1 outside unit inverter PCB input current is different
When the slave2 outside unit inverter PCB input current is different
Communication error between master outside unit master MICOM and
EEPROM or EEPROM missing
Communication error between slave1 outside unit master MICOM and
EEPROM or EEPROM missing
Communication error between slave2 outside unit master MICOM and
EEPROM or EEPROM missing
Master Communication error between master outside unit master PFC
and EEPROM or EEPROM missing
Slave1 Communication error between master outside unit master PFC
and EEPROM or EEPROM missing
Slave2 Communication error between master outside unit master PFC
and EEPROM or EEPROM missing
When signal from slave outside unit is not received from master out-
side unit master MICOM
When signal from slave outside unit is not received from slave1 out-
side unit master MICOM
When signal from slave outside unit is not received from slave2 out-
side unit master MICOM
Master outside unit liquid pipe temperature sensor disconnection or
short circuit
Slave1 outside unit liquid pipe temperature sensor disconnection or
short circuit
Slave2 outside unit liquid pipe temperature sensor disconnection or
short circuit
Master outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Slave1 outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Slave2 outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Master outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Slave1 outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Slave2 outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Outside unit 4 way valve switch error
Master outside unit Fixed speed compressor burn, locking and over-
current
Slave1 outside unit Fixed speed compressor burn, locking and over-
current
Slave2 outside unit Fixed speed compressor burn, locking and over-
current
Plate type heat exchanger freeze prevention error
Water temperature sensor open/short
Communication error between main MICOM and sub MICOM
732
Slave1 outside unit inverter PCB input instant
over-current (Peak)
733
Slave2 outside unit inverter PCB input instant
over-current (Peak)
741
Master outside unit inverter PCB phase imbal-
ance
742
Slave1 outside unit inverter PCB phase imbal-
ance
743
Slave2 outside unit inverter PCB phase imbal-
ance
861
Master outside unit master PCB EEPROM
error
862
Slave1 outside unit master PCB EEPROM
error
863
Slave2 outside unit master PCB EEPROM
error
881
Master PFC PCB EEPROM error
882
Slave1 PFC PCB EEPROM error
883
Slave2 PFC PCB EEPROM error
1041
Communication error between master outside
unit and outside unit
1042
Communication error between slave1 outside
unit and outside unit
1043
Communication error between slave2 outside
unit and outside unit
1131
Master outside unit liquid pipe temperature
sensor error
1132
Slave1 outside unit liquid pipe temperature
sensor error
1133
Slave2 outside unit liquid pipe temperature
sensor error
1141
Master outside unit over-cooling inlet tempera-
ture sensor error
1142
Slave1 outside unit over-cooling inlet tempera-
ture sensor error
1143
Slave2 outside unit over-cooling inlet tempera-
ture sensor error
1151
Master outside unit over-cooling outlet temper-
ature sensor error
1152
Slave1 outside unit over-cooling outlet temper-
ature sensor error
1153
Slave2 outside unit over-cooling outlet temper-
ature sensor error
1 5 1 - Outside unit 4 way valve switch failure
1731
Master outside unit Fixed speed compressor
error
1732
Slave1 outside unit Fixed speed compressor
error
1733
Slave2 outside unit Fixed speed compressor
error
1 8 0 - Plate type heat exchanger freeze prevention
1 8 1 - Water temperature sensor error
1 8 2 - Communication error between MICOMs
Outside unit
n Refer to the troubleshooting guide of service technical manual for each error.
84 Outside Unit
Cooling tower applied method
Cooling tower applied method
[Open type cooling tower + Second heat exchanger]
Heat exchanger is installed between the cooling tower
and outside unit system piping, and the temperature
difference between 1st side and 2nd side is main-
tained constantly
[Closed type cooling tower]
Heat source water of the cooling tower is supplied
directly to the outside unit system.
Open type
cooling tower
Closed type
cooling tower
1
st
side
2
nd
side
Heat exchange
When the open type cooling tower is used and the water supply is directly connected to the 2nd heat exchanger, product
damage by alien particle cannot be repaired for free.
- Always use the 2nd heat exchanger.
ENGLISH
Installation Manual 85
The installer and system specialist shall secure safety against leakage according to local regulations or standards.
The following standards may be applicable if local regulations are not available.
Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to
such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
n Limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
n Calculate amount of all the replenished refrigerant (kg) per each refrigerant
system.
n Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the smaller room.
(1) Without partition
(2) With partition and with opening which serve as
passage of air to adjoining room
Caution For Refrigerant Leak
Introduction
Checking procedure of limiting concentration
Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken with-
out hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the
unit of kg/m
3
(Freon gas weight per unit air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m
3
(R410A)
Outside unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Amount of additional
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
facility (kg)
+
=
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
Outside unit
Indoor unit
Outside unit
Indoor unit
Opening
Partition
In the case of opening
without door , or 0.15
% or more openings
(to floor space) both
above and below door)
Amount of replenished
refrigerant per one outside
unit system
Amount of replenished
refrigerant at factory shipment
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
Caution For Refrigerant Leak
86 Outside Unit
Caution For Refrigerant Leak
(3) With partition and without opening which serve as passage of air to adjoining room
n Calculate refrigerant concentration
n In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermeasures
shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening without
door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outside refrigerant qty.
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is
heavier than air.
Outside unit
Indoor unit
Smallest
room
(R410A)
=
Refrigerant concentration
(kg/m
3
)
Total amount of replenished
refrigerant in refrigerant facility (kg)
Capacity of smallest room where
indoor unit is installed (m
3
)
In case the result of calculation exceeds
the limiting concentration, perform the
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
limiting concentration.
Countermeasure 2
Gas leak alarm
Mechanical ventilator
Countermeasure 1
Opening effective to ventilation
Indoor unit
ENGLISH
Installation Manual 87
CN_26
CN_24
CN_22
INTERNET
MAIN PCBC_Box
DDC BMS
Flow Switch
Solenoid
Valve
Water
Out
Water
In
CN_26
CN_24
CN_22
MAIN PCBC_Box
Flow Switch
Solenoid
Valve
Water
Out
Water
In
L1
L2 3(A) 3(B)
4(A) 4(B)
L1
L2 3(A) 3(B)
4(A) 4(B)
Water Solenoid Valve Control
Set the dip switch refer to Fig.1 and turn on the power when you individual control for water solenoid valve
control.
Figure 1
1234567
ON
1234567
ON
Central Control (Use DDC Port)
Individual Control (Use 208/230V Out Port)
Water Solenoid Valve Control
88 Outside Unit
Variable Water Flow Control KIT(Accessory)
Variable Water Flow Control KIT(Accessory)
1. Shut off the main power line of outdoor unit.
2. Install the VWFC(Variable Water Flow Control) PCB in the C/BOX by using screws.
3. Install the transformer in the C/BOX by using screws.
4. Install the terminal block in the C/BOX by using screws.
5. Connect the Main PCB(CN41) to VWFC(CN_OUT) by using the cable assy.
6. Connect the blue wire of transformer to the Main PCB (JIG1(L), JIG2(N)).
7. Connect the red wire of transformer to the terminal block (2Pin Yellow terminal block).
8. Connect a power cable (DC 12V) to CN_PWR(12V, GND) of VWFC.
9. Connect a signal cable (DC 0~10V) of water flow control valve to CN_AO(AO_01(A+), GND(A-)) of VWFC.
10. Case of two water flow control valve, Connect a signal cable (DC 0~10V) of water flow control valve to
CN_AO(AO_02(B+), GND(B-)) of VWFC.
11. Connect a power cable (AC 24V) of water flow control valve to the terminal block (2Pin Yellow terminal block, Max cur-
rent 0.42A).
12. Connect the RS-485 communication cable to CN_COMM(BUS_A, BUS_B) of VWFC
13. Set up the main function Dip S/W of VWFC PCB.
14. Set up the Dip SW of outdoor main PCB.
15. Turn on the main power line of outdoor unit.
16. Check the signal of water flow control valve to CN_AO(AO_01, GND) of VWFC and the water flow rate.
1 2 3
1: Terminal block
2 : Transformer
3 : VWFC PCB
1. Install the product on flat surface and screw at least 2 places. Otherwise the VWFC PCB may not be anchored properly.
2. Do not deform the case at random. It may cause malfunction of the Variable Water Flow Control PCB
3. This is a class A product. In a non-industrial environment, this product may cause radio interference, in which case the user
may be required to take adequate measures.
USA, press #2 for PTAC, TTW
USA, press #3 for DFS, Multi V
CANADA
888-865-3026
888-865-3026
1-888-LG-Canada
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LGEUS
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1000 Sylvan Ave., Englewood Cliffs, NJ 07632
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LG ELECTRONICS CANADA INC.
20 NORELCO DRIVE.
NORTH YORK, ONTARIO M9L 2X6.
US
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CANADA
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