LG THERMA V Air-to-Water Heat Pump User manual

P/NO : MFL63285302 www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE : Air-to-Water Heat Pump
ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
PORTUGUÊS
ENGLISH

Air-to-Water Heat Pump Installation Manual
TABLE OF CONTENTS
ITEMS INSIDE PRODUCT BOX ..........................................................................................5
INDOOR UNIT BOX ......................................................................................................................5
OUTDOOR UNIT BOX ..................................................................................................................5
PREFACE.............................................................................................................................6
1. SAFETY PRECAUTION...................................................................................................7
WARNING .....................................................................................................................................7
INSTALLATION WARNING .....................................................................................................7
OPERATION WARNING .........................................................................................................8
CAUTION ......................................................................................................................................9
INSTALLATION CAUTION ......................................................................................................9
OPERATION CAUTION ..........................................................................................................9
2. GENERAL INFORMATION ............................................................................................10
MODEL INFORMATION..............................................................................................................11
ACCESSORIES ..........................................................................................................................12
ACCESSORIES SUPPORTED BY LG Electronics ...............................................................12
ACCESSORIES SUPPORTED BY 3rd PARTY COMPANIES ..............................................12
TYPICAL INSTALLATION EXAMPLE..........................................................................................13
CASE 1..................................................................................................................................13
CASE 2..................................................................................................................................14
CASE 3 .................................................................................................................................15
CYCLE DIAGRAM ......................................................................................................................16
REFRIGERANT CYCLE........................................................................................................16
WATER CYCLE.....................................................................................................................18
PARTS AND DIMENSIONS ........................................................................................................19
INDOOR UNIT (EXTERNAL) ................................................................................................19
INDOOR UNIT (INTERNAL)..................................................................................................21
OUTDOOR UNIT (EXTERNAL) ............................................................................................21
CONTROL PARTS ......................................................................................................................24
CONTROL BOX : INDOOR UNIT..........................................................................................24
CONTROL PANEL ................................................................................................................25
WIRING DIAGRAM : INDOOR UNIT.....................................................................................25
CIRCUIT DIAGRAM : INDOOR UNIT ...................................................................................25
WIRING DIAGRAM : OUTDOOR UNIT.................................................................................25
WIRING DIAGRAM : INDOOR UNIT AND OUTDOOR UNIT (INCL. FIELD WIRING).........26
2Air-to-Water Heat Pump

3. INSTALLATION OF OUTDOOR UNIT ...........................................................................30
CONDITIONS WHERE OUTDOOR UNIT IS INSTALLED..........................................................30
DRILL A HOLE IN THE WALL.....................................................................................................30
INSTALLATION AT SEASIDE .....................................................................................................31
SEASONAL WIND AND CAUTIONS IN WINTER ......................................................................31
4. INSTALLATION OF INDOOR UNIT ...............................................................................32
CONDITIONS WHERE INDOOR UNIT IS INSTALLED..............................................................32
GENERAL CONSIDERATIONS ............................................................................................32
SERVICE SPACE..................................................................................................................32
MOUNTING TO WALL ..........................................................................................................33
WATER VOLUME AND WATER PUMP CAPACITY .............................................................34
WATER VOLUME AND EXPANSION VESSEL PRESSURE................................................35
WATER QUALITY .................................................................................................................36
CONDITIONS IF ACCESSORIES ARE INSTALLED..................................................................37
THERMOSTAT ......................................................................................................................37
REMOTE AIR TEMPERATURE SENSOR........................................................................... 37
SANITARY WATER TANK AND SANITARY WATER TANK KIT / SOLAR THERMAL KIT ...38
3WAY VALVE(2WAY VALVE) ................................................................................................40
5. PIPING AND WIRING FOR OUTDOOR UNIT ...............................................................41
REFRIGERANT PIPING .............................................................................................................41
CONSTRAINTS IN PIPE LENGTH AND ELEVATION ..........................................................41
PREPARATION FOR PIPING ...............................................................................................42
CONNECTING PIPE TO INDOOR UNIT ..............................................................................43
CONNECTING PIPE TO OUTDOOR UNIT ..........................................................................43
ELECTRICAL WIRING................................................................................................................46
WIRE SPECIFICATION.........................................................................................................46
CIRCUIT BREAKER SPECIFICATION .................................................................................47
WIRING PROCEDURE FOR POWER CABLE AND CONNECTING CABLE.......................47
FINALIZING ................................................................................................................................49
PIPE FORMING ....................................................................................................................49
LEAKAGE TEST AND EVACUATION.........................................................................................50
PREPARATION .....................................................................................................................50
LEAKAGE TEST ...................................................................................................................50
EVACUATION........................................................................................................................51
6. PIPING AND WIRING FOR INDOOR UNIT...................................................................52
WATER PIPING AND WATER CIRCUIT CONNECTION............................................................52
GENERAL CONSIDERATIONS ............................................................................................52
WATER PIPING AND WATER CIRCUIT CONNECTION......................................................52
WATER CHARGING .............................................................................................................54
PIPE INSULATION................................................................................................................54
ENGLISH
Installation Manual 3

ELECTRICAL WIRING................................................................................................................55
GENERAL CONSIDERATION...............................................................................................55
TERMINAL BLOCK INFORMATION .....................................................................................56
CONNECTING WITH OUTDOOR UNIT ...............................................................................58
ELECTRIC HEATER WIRING...............................................................................................58
7. ACCESSORIES INSTALLATION...................................................................................59
BEFORE INSTALLATION ...........................................................................................................59
THERMOSTAT ............................................................................................................................59
GENERAL INFORMATION ...................................................................................................59
HOW TO WIRE THERMOSTAT ............................................................................................60
FINAL CHECK.......................................................................................................................61
SANITARY WATER TANK AND SANITARY WATER TANK KIT/SOLAR THERMAL KIT ...........62
GENERAL INFORMATION ...................................................................................................62
HOW TO INSTALL SANITARY WATER TANK......................................................................63
HOW TO INSTALL SANITARY WATER TANK KIT ...............................................................64
HOW TO WIRE SANITARY WATER TANK HEATER............................................................66
HOW TO INSTALL SOLAR THERMAL KIT...........................................................................67
DRY CONTACT...........................................................................................................................67
REMOTE TEMPERATURE SENSOR.........................................................................................67
3WAY VALVE ..............................................................................................................................68
HOW TO WIRE 3WAY VALVE ..............................................................................................68
FINAL CHECK.......................................................................................................................68
2WAY VALVE ..............................................................................................................................69
GENERAL INFORMATION ...................................................................................................69
HOW TO WIRE 2WAY VALVE ..............................................................................................69
FINAL CHECK.......................................................................................................................69
8. SYSTEM SET-UP ...........................................................................................................70
DIP SWITCH SETTING...............................................................................................................70
GENERAL INFORMATION ...................................................................................................70
DIP SWITCH INFORMATION................................................................................................71
CONTROL PANEL SETTING......................................................................................................74
HOW TO ENTER INSTALLER SETTING MODE..................................................................74
SUMMARY ............................................................................................................................76
COMMON SETTING .............................................................................................................81
TEMPERATURE RANGE SETTING .....................................................................................82
TEMPERATURE CONTROL PARAMETER SETTING AND ETC.........................................83
9. CHECK POINTS, MAINTENANCE AND TROUBLESHOOTING..................................88
CHECK LIST BEFORE STARTING OPERATION.......................................................................88
MAINTENANCE ..........................................................................................................................89
TROUBLESHOOTING ................................................................................................................90
TROUBLESHOOTING FOR PROBLEM WHILE OPERATION.............................................90
4Air-to-Water Heat Pump

Items Inside Product Box
Thank you for choosing LG Electronics Air-to-Water Heat Pump
Before starting installation, please make it sure that all parts are found inside the product box.
INDOOR UNIT BOX
Indoor unit 1
1
1
Shut-off valve 2
1
1
Item Image Quantity Item Image Quantity
Installation
Manual
Installation
plate
Owner's
Manual Installation
Sheet
www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE :
www.lg.com
OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully beforeoperating
your set and retain it forfuture reference.
TYPE : WALL MOUNTED
Outdoor unit
UE1 Chassis
(Product heating capacity :
9kW)
OUTDOOR UNIT BOX
Item Image Quantity
1
1
1
Outdoor Unit
AHUW096A1(U4 Chassis)
(Product heating capacity :
9kW)
Outdoor unit
U3 Chassis
(Product heating capacity :
12kW,14kW,16kW)
Items inside product box
ENGLISH
Installation Manual 5

Preface
This installation manual is to present information and guide about understanding, installing,
and checking .
Your careful reading before installation is highly appreciated to make no mistake and to prevent potential risks.
The manual is divided into nine chapters. These chapters are classified according to installation procedure.
See the table below to get summarized information.
• Warning and Caution concerned with safety.
• This chapter is directly related with human safety. We STRONGLY
recommend reading this chapter carefully.
• Fundamental knowledge about
• Model identification, accessories information, refrigerant and water cycle
diagram, parts and dimensions, electrical wiring diagrams, etc.
• This chapter is important to understand
• Installation about the outdoor unit.
• Installation location, constraints on installation site, etc
• Installation about the indoor unit.
• Installation location, constraints on installation site, etc
• Constrains when accessories are installed
• How to perform piping (for refrigerant) and wiring at the outdoor unit.
• Refrigerant pipe connection between the indoor unit and the outdoor unit.
• Electrical wiring at the outdoor unit.
• How to perform piping (for water) and wiring at the indoor unit.
• Water pipe connection between the indoor unit and pre-built under floor
water loop pipe.
• Electrical wiring at the indoor unit.
• System set-up and configuration.
• As many control parameters of is adjustable by control panel,
deep understanding about this chapter is required to secure the operation
flexibility of
• For more detailed information, please read the separate OPERATION
MANUAL to use control panel and adjust control parameters.
• Information about supported accessories
• Specification, Constraints, and wiring are described.
• Before purchasing accessories, please find supported specification to buy
proper one.
• Test operation and check point while test running.
• Check points before starting operation are explained.
• Troubleshooting, maintenance, and error code list are presented to correct
problems.
Chapters Contents
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
REMARK : ALL CONTENTS OF THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE.
TO GET THE LATEST INFORMATION, PLEASE VISIT LG ELECTRONICS WEB SITE
www.lgservice.com
Preface
6Air-to-Water Heat Pump

Safety Precautions
ENGLISH
Installation Manual 7
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
Do not install, remove, or
reinstall the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury
Be cautious when
unpacking and installing the
product.
• Sharp edges could cause injury.
Especially careful on the product
edges and the fins on the heat
exchanger.
1. Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
nBe sure to read before installing the product.
nBe sure to observe the cautions specified here as they include important items related to safety.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified
by the following indications.
nMeanings 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.
nInstallation
Be sure not to do.
Be sure to follow the instruction.
Do not use a defective or
underrated circuit breaker.
Use this appliance on a
dedicated circuit.
• There is risk of fire or electric
shock.
For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• There is risk of fire or electric
shock.
Always ground the product.
• There is risk of fire or electric
shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric
shock.
Always install a dedicated
circuit and breaker.
• Improper wiring or installation
may cause fire or electric
shock
Use the correctly rated
breaker or fuse.
• There is risk of fire or electric

8Air-to-Water Heat Pump
nOperation
For installation, always
contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
Do not install the product on
a defective installation
stand.
• It may cause injury, accident,
or damage to the product.
Be sure the installation area
does not deteriorate with
age.
• If the base collapses, the product
could fall with it, causing property
damage, product failure, and
personal injury.
Do not let the product run for a
long time when the humidity is
very high and a door or a
window is left open.
• Moisture may be condensed
and wet or damage furniture.
Take care to ensure that
power cable could not be
pulled out or damaged
during operation.
• There is risk of fire or electric
shock.
Do not place anything on
the power cable.
• There is risk of fire or electric
shock.
Do not plug or unplug the power
supply plug during operation.
• There is risk of fire or electric
shock.
Do not touch (operate) the
product with wet hands.
• There is risk of fire or electric
shock.
Do not place a heater or other
appliances near the power cable.
• There is risk of fire or electric
shock.
Safety Precautions
Ventilate the product from
time to time when operating
it together with a stove, etc.
• There is risk of fire or electric
shock.
Turn the main power off
when cleaning or
maintaining the product.
• There is risk of electric shock.
Take care to ensure that
nobody could step on or fall
onto the outdoor unit.
• This could result in personal
injury and product damage.
Do not allow water to run
into electric parts.
• There is risk of fire, failure of
the product, or electric shock.
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure
of product.
Do not use the product in a
tightly closed space for a
long time.
• Oxygen deficiency could
occur.
When flammable gas leaks,
turn off the gas and open a
window for ventilation
before turn the product on.
• There is risk of explosion or
fire.
If strange sounds, or small or
smoke comes from product, turn
the breaker off or disconnect the
power supply cable.
• There is risk of electric shock
or fire.
Stop operation and close the window
in storm or hurricane. If possible,
remove the product from the window
before the hurricane arrives.
• There is risk of property
damage, failure of product, or
electric shock.
Do not open the front cover of
the indoor unit while operation.
(Do not touch the electrostatic
filter, if the unit is so equipped.)
• There is risk of physical injury,
electric shock, or product
failure.
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
• There is risk of fire or electric
shock.
Be cautious that water could
not be poured to the product
directly.
• There is risk of fire, electric
shock, or product damage.

ENGLISH
Installation Manual 9
Safety Precautions
nInstallation
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 it will be exposed to
sea wind (salt spray)
directly.
• It may cause corrosion on the
product. Corrosion, particularly on
the condenser and evaporator fins,
could cause product malfunction or
inefficient operation.
Keep level even when
installing the product.
• To avoid vibration or water
leakage.
Do not install the product where the noise
or hot air from the outdoor unit could
damage the neighborhoods.
• It may cause a problem for your neighbors.
Use two or more people to lift and transport
the product.
• Avoid personal injury.
Special warning about no operation for long-time
• If the product is not used for long time, we strongly recommend NOT TO
SWITCH OFF THE POWER SUPPLY to the product.
• If power is not supplied, some special product-protecting actions (such as
water pump anti-locking) will not performed.
nOperation
Do not lay on the cooled
floor for long time when the
product is in cooling
operation.
• This could harm to your health.
Do not use the product for
special purposes, such as
preserving foods, works of art,
etc. It is a consumer product, not
a precision refrigeration system.
• There is risk of damage or loss of
property.
Do not block the outlet of air
flow.
• It may cause product failure.
Use a soft cloth to clean. Do
not use harsh detergents,
solvents, etc.
• There is risk of fire, electric
shock, or damage to the plastic
parts of the product.
Do not step on or put
anything on the product.
(outdoor units)
• There is risk of personal injury
and failure of product.
Do not insert hands or other
objects into the product
while it is operating.
• There are sharp and moving
parts that could cause personal
injury.
Use a firm stool or ladder
when cleaning or
maintaining the product.
• Be careful and avoid personal
injury.
At low outdoor temperature,
the product will display
“CH44”
• It may cause a problem for
product.

2. General Information
Model Information
With advanced inverter technology, is suitable for applications like under floor heating,
under floor cooling, and hot water generation. By Interfacing to various accessories user can
customize the range of the application.
In this chapter, general information of is presented to identify the installation
procedure. Before beginning installation, read this chapter carefully and find helpful information on
installation.
Model number nomenclature
A H —W 0 9 6 A 0
Series Number(N : Nordic Model)
Chassis Name
Electrical ratings
6 : 1 phase 220-240V AC 50Hz 8 : 3 phase 380-415V AC 50Hz
Heating Capacity (kW)
09 : 9kW 12 : 12kW 14 : 14kW 16 : 16kW
Model Type
W : Inverter Heat Pump H : Heat Pump
Classification
N : Indoor Unit U : Outdoor Unit – : Set
Air-to-Water Heat Pump for R410A
AH N W 0 9 A 0 6 A 0
Series Number
Chassis Name
Heater Electrical ratings
6 : 1 phase 220-240V AC 50Hz
8 : 3 phase 380-415V AC 50Hz
A : 3 phase 220V AC 50Hz
Heating Capacity (kW)
09 : 9kW 12 : 12kW 14 : 14kW 16 : 16kW
Heater Capacity (kW)
04 : 4kW 06 : 6kW
Model Type
W : Inverter Heat Pump H : Heat Pump
Classification
N : Indoor Unit U : Outdoor Unit — : Set
Air-to-Water Heat Pump for R410A
10 Air-to-Water Heat Pump
General Information

General Information
ENGLISH
Installation Manual 11
*1 : tested under Eurovent Heating condition
(water temperature 30°C ’35°C at outdoor ambient temperature 7°C / 6°C)
*2 : tested under Eurovent Cooling condition
(water temperature 23°C ’18°C at outdoor ambient temperature 35°C / 24°C)
*
*3 : All appliances were tested at atmospheric pressure.
Model name and related information
Set Outdoor Unit Indoor Unit Heating(kW) *1 Cooling(kW) *1
AH-W096A0 AHUW096A0 AHNW096A0 4(2+2) 9 8.6
AH-W126A0 AHUW126A0 AHNW126A0 12 14
AH-W146A0 AHUW146A0 AHNW146A0 14 14
AH-W166A0 AHUW166A0
AHUW096A1
AHNW166A0
AHNW09604A1
16 14
-
-
AHNW09606A0 6(3+3)
- AHNW09A06A0
- AHNW09806A0
- AHNW16606A1 6(3+3)
- AHNW16A06A1
- AHNW16806A1
- AHNW16606A1 6(3+3)
- AHNW16A06A1
- AHNW16806A1
- AHNW16606A1 6(3+3)
- AHNW16A06A1
- AHNW16806A1
AHUW128A1
AHUW148A1
AHUW168A1
AHUW146A2
AHUW126A2
Model Name Built-In Electric
Heater(kW)
6(3+3)
4(2+2)
6(2+2+2)
AHUW096AN
6(2+2+2)
6(2+2+2)
6(2+2+2)
6(3+3)
6(2+2+2)
6(3+3)
6(2+2+2)
Capacity
98.6
99
12 17.8
14 16.1
Power Source
(Electric Heater)
Power Source
(Unit)
16 15.1
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
3N~ 220V 50Hz
3N~ 380V-415V 50Hz
1~ 220V-240V 50Hz
1~ 220V-240V 50Hz
3N~ 380V-415V 50Hz
3N~ 380V-415V 50Hz
3N~ 380V-415V 50Hz
-
6(3+3)
- AHNW16606A1
-
-
-
16
14
12
14
12
14
12
16.1
15.5ㅤ
14.5
1~ 220V-240V 50Hz 1~ 220V-240V 50Hz
1~ 220V-240V 50Hz
1~ 220V-240V 50Hz
AHNW16606A1
AHNW16A06A1
AHNW16806A1
AHNW16606A1
AHNW16A06A1
AHNW16806A1
AHUW166A1
AHUW146A1
AHUW126A1

Accessories
Accessories supported by LG Electronics
To extend the functionality of , there are various external auxiliary apparatus called as
ʻaccessories.ʼ
They are classified by ʻaccessoriesʼ and ʻ3rd party accessoriesʼ according to the manufacturer.
Accessories are presented LG Electronics, and 3rd party accessories are presented by related
manufacturers.
Accessories supported by 3rd party Companies
Item Purpose Specification
Solar Heating System
Thermostat
3way valve and actuator
2way valve and actuator
To generate auxiliary heating energy
for water tank
To control by air temperature
To control water flow for hot water
heating or floor heating
To control water flow for Fan Coil Unit
Heating-Only type (230V AC or 24V AC)
Cooling/Heating type (230V AC or 24V
AC with Mode selection switch)
3 wire, SPDT (Single Pole Double
Throw) type, 230V AC
2 wire,NO(Normal Open) or NC(Normal
Closed) type,230V AC
Item Purpose Model
Sanitary Water Tank Install Kit
Remote Air Sensor
Dry Contact
Solar Heating Kit
Sanitary Water Tank
To operate with sanitary water tank
To control by air temperature
To receive on & off external signal
To operate with solar heating system
To generate and store hot water
PHLTA
PQRSTA0
PQDSA
PHLLA (Limit Temperature : 96℃)
PHLLB (Limit Temperature : 120℃)
PHS02060310 : 200 liter, Single Heating Coil,
1Ø 230V 50Hz 3kW Electric Heater
PHS02060320 : 200 liter, Double Heating Coil,
1Ø 230V 50Hz 3kW Electric Heater
PHS03060310 : 300 liter, Single Heating Coil,
1Ø 230V 50Hz 3kW Electric Heater
PHS03060320 : 300 liter, Double Heating Coil,
1Ø 230V 50Hz 3kW Electric Heater
General Information
12 Air-to-Water Heat Pump

General Information
ENGLISH
Installation Manual 13
If is installed with pre-existing boiler, the boiler and THERMA V should not be
operated together. If entering water temperature of is above 55°C, the system will
stop operation to prevent mechanical damage of the product. For detailed electric wiring and water
piping, please contact authorized installer.
Some installation scenes are presented for example. As these scenes are conceptual figures,
installer should optimize the installation scene according to the installation conditions.
CASE 1: Connecting Heat Emitters for Heating and Cooling
(Under floor loop, Fan Coil Unit, and Radiator)
Outdoor Indoor
Outdoor Unit
Indoor Unit
Floor heating loopFan coil unit
Radiator
High Temperature Room Thermostat(Field supply)
2way valve
(Field supply) By-pass valve(Field supply)
Low Temperature
Shut-off valve
Typical Installation Example
Note:
• Room thermostat
- Type of thermostat and specification should be complied with chapter 4 and chapter 7 of
installation manual.
• 2way valve
- It is important to install 2way valve to prevent dew condensation on the floor and radiator while
cooling mode.
- Type of 2way control valve and specification should be complied with chapter 4 and chapter 7 of
installation manual.
- 2way valve should be installed at the supply side of the collector.
• By-pass valve
- To secure enough water flow rate, by-pass valve should be installed at the collector.
- By-pass valve should guarantee minimum water flow rate in any case. Minimum water flow rate is
described in water pump characteristics curve.

CASE 2: Connecting Sanitary Water Tank
Outdoor Indoor
Outdoor Unit
Indoor Unit
Floor heating loopFan coil unit
Sanitary
water
tank
Hot water
City water
Radiator
High Temperature Room Thermostat(Field supply)
2way valve
(Field supply) 3way valve
(Field supply)
By-pass valve(Field supply)
Low Temperature
Shut-off valve
Note:
• Sanitary water tank
- It should be equipped with internal electric heater to generate sufficient heat energy in very cold
season.
• 3way valve
- Type of 3way valve and specification should be complied with chapter 4 and chapter 7 of
installation manual.
General Information
14 Air-to-Water Heat Pump

General Information
CASE 3: Connecting Solar thermal system
Solar heat source
Outdoor Indoor
Outdoor Unit
Indoor Unit
Floor heating loopFan coil unit
Sanitary
water
tank
Hot water
City water
Radiator
High Temperature Room Thermostat(Field supply)
2way valve
(Field supply) 3way valve
(Field supply)
By-pass valve(Field supply)
Low Temperature
Shut-off valve Pump(Field supply)
Note:
• Sanitary water tank
- It should have additional indirect heat exchanger to utilize heat energy by solar thermal system.
• Pump
- Maximum power consumption of pump should be less than 0.25kW.
ENGLISH
Installation Manual 15

16 Air-to-Water Heat Pump
Cycle Diagram
Refrigerant Cycle(Non-Vapor Injection)
Description
INDOOR UNIT OUTDOOR UNIT
Indoor Unit
Plate Heat
Exchanger
Outdoor Unit
EEV
Heat Exchanger
COMPRESSOR
Accumulator
GAS SIDE
LIQUID SIDE
3-Way
Service Valve
3-Way
Service Valve
COOLING
HEATING
Reversing Valve
High Pressure
Switch
Low Pressure
Switch
Th3
Th2 Th6
Th7
Th8
Th5
Th4
- Optional accessory (being sold separately)
- Not shown in diagram
- Meaning is expressed based on Cooling
mode.
- Th4 and Th5 are connected at 4 pin type
connector CN_TH3.
- Description is expressed based on Cooling
mode.
- Th6 and Th7 are connected at 4 pin type
connector CN_TH2
- Th8 is connected at 4 pin type connector CN_TH3
CN_ROOM
CN_PIPE
CN_PIPE/O
CN_TH3
CN_TH3
CN_TH2
CN_TH2
CN_TH3
CN_LEV1
Remote air temperature sensor
Inlet evaporator temperature sensor
Outlet evaporator temperature sensor
Compressor-suction pipe temperature sensor
Compressor-discharge pipe temperature sensor
Condenser temperature sensor
Outdoor air temperature sensor
Condenser middle temperature sensor
Electronic Expansion Valve
Th1
Th2
Th3
Th4
Th5
Th6
Th7
EEV
Category Symbol Meaning PCB
Connector Remarks
Indoor Unit
Outdoor Unit
Th8*1
*1:Applied Model : AHUW128A1, AHUW148A1, AHUW168A1, AHUW096A1, AHUW126A1, AHUW146A1, AHUW166A1
General Information
Refrigerant Cycle(Vapor Injection)
INDOOR UNIT OUTDOOR UNIT
Indoor Unit
Plate Heat
Exchanger
Outdoor Unit
Phase,
Separator
EEV
Heat Exchanger
COMPRESSOR
Accumulator
GAS SIDE
LIQUID SIDE
3-Way
Service Valve
3-Way
Service Valve
COOLING
HEATING
Reversing Valve
High Pressure
Switch
Low Pressure
Switch
Th3
Th2 Th6
Th7
Th8
Th5
Th4
EEV
EEV
- Optional accessory (being sold separately)
- Not shown in diagram
- Meaning is expressed based on Cooling mode.
- Th4 and Th5 are connected at 4 pin type connector
CN_TH3.
- Description is expressed based on Cooling mode.
- Th6 and Th7 are connected at 4 pin type connector
CN_TH2
- Th8 is connected at 4 pin type
connector CN_TH3
- Adjusting mass flow rate of circulating
refrigerant or injecting refrigerant
CN_ROOM
CN_PIPE
CN_PIPE/O
CN_TH3
CN_TH3
CN_TH2
CN_TH2
CN_TH3
CN_LEV1
CN_LEV2
CN_LEV3
Remote air temperature sensor
Inlet evaporator temperature sensor
Outlet evaporator temperature sensor
Compressor-suction pipe temperature sensor
Compressor-discharge pipe temperature sensor
Condenser temperature sensor
Outdoor air temperature sensor
Condenser middle temperature sensor
Electronic Expansion Valve
Th1
Th2
Th3
Th4
Th5
Th6
Th7
EEV
Category Symbol Meaning PCB
Connector Remarks
Indoor Unit
Outdoor Unit
Th8
Description

General Information
Water cycle
Sanitar
y
water tan
k i
s
in
s
t
a
ll
ed
(Sanitar
y
water ta
n
k kit is necessar
y
)
Solar thermal s
y
s
t
e
m i
s
co
nn
ec
t
ed
(
Solar thermal kit
i
s necessar
y
)B
as
i
c
in
s
t
a
ll
a
tion
()
(
IDU + ODU
)
S
ola
r
Th
e
rm
al
Com
p
onet
s
F
an
C
oi
l
U
ni
t
U
nderfloo
r
Heatin
g
R
ad
i
a
to
r
ENGLISH
Installation Manual 17

General Information
Description
- Meaning is expressed based on Cooling
mode.
- TH3, TH4, and TH5 are connected at 6 pin
type connector CN_TH3.
- Heating capacity is divided into two level :
partial capacity by E/HEAT(A) and full
capacity by E/HEAT(A) + E/HEAT(B).
- Operating power(230V AC 50Hz) of internal
water pump is supplied by the connector.
- Absorb volume change of heated water,
- Optional accessory (sold separately)
- Model : PQRSTA0
- Pre built-in at indoor unit
- 3
rd
party accessory and Field installation
(sold separately)
- Generating and storing sanitary hot water by
AWHP or built-in electric heater-
- 3
rd
party accessory and Field installation
(usually built-in at W/TANK)
- Supplying additional water heating capacity.
- 3
rd
party accessory and Field installation
(sold separately)
- SPDT type 3way valve is supported.
- Field installation
- Field installation
- 3
rd
party accessory and Field installation
(sold separately)
- SPDT type 3way valve is supported.
- 3
rd
party accessory and Field installation
(sold separately)
-
If water pump of SOLAR THERMAL SYSTEM
is incapable of circulation,external water pump
can be used.
- 3
rd
party accessory and Field installation
(sold separately)
CN_PIPE/OUT
CN_PIPE
CN_TH3
CN_FLOW1
CN_E/HEAT(A)
CN_E/HEAT(B)
CN_W/PUMP(A)
(no connector)
CN_ROOM
CN_REMO
CN_2WAY(A)
(no connector)
CN_B/HEAT(A)
CN_3WAY(A)
(no connector)
(no connector)
CN_TH4
CN_3WAY(B)
CN_W/PUMP(B)
(no connector)
Refrigerant temperature sensor
(Gas side)
Refrigerant temperature sensor
(Liquid side)
Entering Water temperature sensor
Interim Water temperature sensor
Leaving Water temperature sensor
Flow Switch
Electric Heater
Internal Water Pump
Expansion Tank
Remote Air temperature sensor
Control Panel (or
To control water flow for Fan Coil Unit
‘Remote Controller’)
Sanitary Water Tank
Electric Heater
- Flow control for water which is leaving from
indoor unit.
- Flow direction switching between under-
floor and water tank
Water to be heated by Indoor unit and B/HT
of W/TANK
Water supplied to end-user
W/TANK water temperature sensor
Solar-heated water temperature sensor
- Flow control for water which is heated and
circulated by SOLAR THERMAL SYSTEM.
- Flow direction switching between SOLAR
THERMAL SYSTEM and W/TANK
External Water Pump
- This system can include following compo-
nents : Solar panel, Sensors, Thermostats,
Interim heat exchanger, Water pump, etc.
- To utilized hot water heated by SOLAR
THERMAL SYSTEM, end-user must by LG
AWHP Solar-Kit.
TH1
TH2
TH3
TH4
TH5
F/S
E/HT
W_PUMP1
EXP/TANK
TH8
CTR/PNL
2WAY V/V_1
W/TANK
B/HT
3WAY V/V_1
CITY WATER
SHOWER
TH6
TH7
3WAY V/V_2
W_PUMP/2
SOLAR THER-
MAL SYSTEM
Category Symbol Meaning PCB Connector Remarks
Indoor Unit
Water
Heating
Solar
Heating
- Operating power(230V AC 50Hz) of
E/HEAT(A) and E/HEAT(B) are supplied by
external power source via relay connector
and ELB.
- 3rd party accessory and Field installation
(sold separately)
- 2wire NO or NC type 2way valve is
supported.
- TH6 and TH7 are connected at 4 pin type
connector CN_TH4.
- TH6 is a part of sanitary water tank kit.
(Model:PHLTA)
- TH7 is a part of solar thermal kit
(Model:PHLLA)
18 Air-to-Water Heat Pump

General Information
Parts and Dimensions
Indoor unit(External)
315
490
850
315.3
474
Description
No Name Remarks
1 Door Control panel is shown after this door is opened.
2 Handle Used to cover or uncover the front case
(unit:mm)
ENGLISH
Installation Manual 19

General Information
Description
Indoor unit(Internal)
474
848
305
66
39
75.11008176
109
52
474
No Name Remarks
1 Refrigerant Pipe Ø15.88mm
2 Refrigerant Pipe Ø9.52mm
3 Entering Water Pipe Male PT 1 inch
4 Leaving Water Pipe Male PT 1 inch
5 Control Panel Built-in Remote Controller
6 Water Pump Max Head 7.5 / 6.5 m
7 Safety Valve Open at water pressure 3 bar
8
8'
T
Thermal switch
hermal switch
Cut-off power input to electric heater at 90 C (manual return at 55C)
(1Ø Electric Heater is applied)
Cut-off power input to electric heater at 90 C (manual return at 55 C)
(3Ø Electric Heater is applied)
9 Control Box PCB and terminal blocks
10 Flow Switch Minimum operation range at 12 LPM. (9kW)
Minimum operation range at 15 LPM. (12kW, 14kW, 16kW)
11 Plate Heat Exchanger Heat exchange between refrigerant and water
12 Pressure Gage Indicates circulating water pressure
13 Expansion Tank Absorbing Volume change of heated water
14 Air Vent Air purging when Charging water
15 Electric Heater Please refer Page 12
16
17
Strainer
Shut-off valve
18 Carrying handle
Filtering and stacking particles inside circulating water
To drain or to block water when pipe connecting
To carry the product
(unit:mm)
20 Air-to-Water Heat Pump