LG AHBW Series User manual

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)
MODEL : AHBW***A0
AHBW***H0
P/NO : MFL62567801
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH ΕΛΛΗΝΙΚΆ
PORTUGUESE

2Air-to-Water Heat Pump
Air-to-Water Heat Pump Installation Manual
TABLE OF CONTENTS
1. SAFETY PRECAUTION ...................................................................................................5
WARNING .....................................................................................................................................5
INSTALLATION .......................................................................................................................5
OPERATION............................................................................................................................6
CAUTION ......................................................................................................................................7
INSTALLATION .......................................................................................................................7
OPERATION............................................................................................................................7
2. GENERAL INFORMATION ..............................................................................................8
MODEL INFORMATION................................................................................................................8
MODEL NAME AND RELATED INFORMATION.....................................................................8
ACCESSORIES ............................................................................................................................9
ACCESSORIES SUPPORTED BY LG ELECTRONICS ........................................................9
ACCESSORIES SUPPORTED BY 3rd PARTY COMPANIES ................................................9
TYPICAL INSTALLATION EXAMPLE ........................................................................................10
CASE 1..................................................................................................................................10
CASE 2 ..................................................................................................................................11
CASE 3..................................................................................................................................12
CYCLE DIAGRAM ......................................................................................................................13
REFRIGERANT CYCLE........................................................................................................13
WATER CYCLE ....................................................................................................................14
PARTS AND DIMENSIONS .......................................................................................................18
CONTROL PARTS .....................................................................................................................21
CONTROL BOX ....................................................................................................................21
REMOTE CONTROLLER .....................................................................................................24
WIRING DIAGRAM (INCL. FIELD WIRING) ........................................................................27
3. INSTALLATION OF UNIT ...........................................................................................................28
CONDITIONS WHERE UNIT IS INSTALLED ............................................................................28
GENERAL CONSIDERATIONS ...........................................................................................28
TRANSPORT ........................................................................................................................29
WATER VOLUME AND PUMP CAPACITY ..........................................................................29
WATER QUALITY .................................................................................................................30
FROST PROTECTION .........................................................................................................30
REMOTE CONTROLLER ....................................................................................................31
WIRED REMOTE CONTROLLER INSTALLATION ....................................................................33
INSTALLATION AT SEASIDE .....................................................................................................34
SEASONAL WIND AND CAUTIONS IN WINTER ......................................................................34

Installation Manual 3
ENGLISH
4. WIRING AND WATER PIPING FOR UNIT .................................................................................35
ELECTRICAL WIRING................................................................................................................35
WIRE SPECIFICATION.........................................................................................................35
GENERAL CONSIDERATION ..............................................................................................36
WIRING PROCEDURE FOR POWER CABLE .....................................................................36
TERMINAL BLOCK INFORMATION .....................................................................................37
CIRCUIT BREAKER SPECIFICATION ................................................................................39
WATER PIPING AND WATER CIRCUIT CONNECTION............................................................40
GENERAL CONSIDERATIONS ...........................................................................................40
WATER PIPING AND WATER CIRCUIT CONNECTION .....................................................40
5. ACCESSORIES INSTALLATION ................................................................................................42
THERMOSTAT ...........................................................................................................................43
INSTALLATION CONDITION ................................................................................................43
GENERAL INFORMATION ...................................................................................................44
HOW TO WIRE THERMOSTAT ............................................................................................45
FINAL CHECK ......................................................................................................................46
SANITARY WATER TANK AND SANITARY WATER TANK KIT .................................................48
INSTALLATION CONDITION ................................................................................................48
HOW TO INSTALL SANITARY WATER TANK ......................................................................50
HOW TO INSTALL SANITARY WATER TANK KIT................................................................51
HOW TO WIRE SANITARY WATER TANK HEATER............................................................51
DRY CONTACT...........................................................................................................................52
REMOTE TEMPERATURE SENSOR.........................................................................................53
3WAY VALVE ..............................................................................................................................54
GENERAL INFORMATION ...................................................................................................54
HOW TO WIRE 3WAY VALVE...............................................................................................54
FINAL CHECK.......................................................................................................................55
AIR-VENT ...................................................................................................................................55
WATER VOLUME AND EXPANSION VESSEL PRESSURE......................................................56
6. SYSTEM SET-UP ........................................................................................................................57
DIP SWITCH SETTING ..............................................................................................................57
GENERAL INFORMATION ...................................................................................................57
DIP SWITCH INFORMATION ...............................................................................................58
INSTALLER SETTING ................................................................................................................61
HOW TO ENTER INSTALLER SETTING MODE .................................................................61
SUMMARY ............................................................................................................................62
COMMON SETTING .............................................................................................................68
TEMPERATURE RANGE SETTING .....................................................................................69
TEMPERATURE CONTROL PARAMETER SETTING AND ETC.........................................70

4Air-to-Water Heat Pump
7. CHECK POINTS, MAINTENANCE AND TROUBLESHOOTING...............................................75
CHECK LIST BEFORE STARTING OPERATION.......................................................................75
MAINTENANCE ..........................................................................................................................76
TROUBLESHOOTING ................................................................................................................77
TROUBLESHOOTING FOR PROBLEM WHILE OPERATION ............................................77
TROUBLESHOOTING FOR ERROR CODE ........................................................................78
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

Installation Manual 5
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
unit.
•
Sharp edges could cause injury.
Especially careful on the unit edges
and the fins on the heat exchanger.
Safety Precautions
1. Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
n
Be sure to read before installing the unit.
n
Be sure to observe the cautions specified here as they include important items related to safety.
n
Incorrect 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 unit.
• 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.
ENGLISH
For antifreeze, always contact the dealer or
an authorized service center.
•
Almost the antifreeze is a toxic product.
The refrigerant of this product is R410A.
•
The installation tool such as manifold gauge should be
complied with R410A.

6Air-to-Water Heat Pump
Safety Precautions
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 unit on a
defective installation stand.
• It may cause injury, accident,
or damage to the unit.
Be sure the installation area
does not deteriorate with
age.
• If the base collapses, the unit
could fall with it, causing
property damage, unit failure,
and personal injury.
Do not let the unit 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
unit 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.
Ventilate the unit 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 unit.
• There is risk of electric shock.
Take care to ensure that
nobody could step on or fall
onto the unit.
• This could result in personal
injury and unit damage.
Do not allow water to run
into electric parts.
• There is risk of fire, failure of
the unit, or electric shock.
Do not store or use flammable
gas or combustibles near the
unit.
• There is risk of fire or failure
of unit.
Do not use the unit 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 unit on.
• There is risk of explosion or
fire.
If strange sounds, or smell or
smoke comes from unit, 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 unit from the window
before the hurricane arrives.
• There is risk of property
damage, failure of unit, or
electric shock.
Do not open the front cover of
the unit while operation. (Do
not touch the electrostatic filter,
if the unit is so equipped.)
• There is risk of physical injury,
electric shock, or unit failure.
When the unit 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 unit
directly.
• There is risk of fire, electric
shock, or unit damage.

For installation, always
contact the dealer or an
authorized service center.
•
There is risk of fire, electric shock,
explosion, or injury.
If the unit is not used for long
time, we strongly recommend
not to switch off the power
supply to the unit.
•
There is risk of water freezing.
Installation Manual 7
ENGLISH
nInstallation
Always check for gas
(refrigerant) leakage after
installation or repair of unit.
• Low refrigerant levels may cause
failure of unit.
Do not install the unit where
it will be exposed to sea
wind (salt spray) directly.
•
It may cause corrosion on the
unit. corrosion, particularly on
the condenser and evaporator
fins, could cause unit
malfunction or inefficient
operation.
Keep level even when
installing the unit.
• To avoid vibration or water
leakage.
Do not install the unit where the noise or hot
air from the unit could damage the
neighborhoods.
• It may cause a problem for your neighbors.
Use two or more people to lift and transport
the unit.
• Avoid personal injury.
Safety Precautions
nOperation
Do not lay on the cooled
floor for long time when the
unit is in cooling operation.
• This could harm to your health.
Do not use the unit for special
purposes, such as preserving
foods, works of art, etc. It is a
consumer unit, 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 unit 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 unit.
Do not step on or put
anything on the unit.
• There is risk of personal injury
and failure of unit.
Do not insert hands or other
objects into the unit 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 unit.
• Be careful and avoid personal
injury.

General Information
8Air-to-Water Heat Pump
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 name and related information
* : tested under Eurovent Heating condition (water temperature 30 °C ’35 °C at outdoor ambient
temperature 7 °C / 6 °C)
** : tested under Eurovent Cooling condition (water temperature 23 °C ’18 °C at outdoor ambient
temperature 35 °C / 24 °C)
Unit Capacity Power Source (Unit)
Heating (kW)* Cooling (kW)**
AHBW036H0 3 - 1 Ø 220~240 V 50 Hz
AHBW056A0 4.99 4.99 1 Ø 220~240 V 50 Hz
AHBW076A0 7 7 1 Ø 220~240 V 50 Hz
AHBW096A0 9 9 1 Ø 220~240 V 50 Hz
AHBW126A0 14.5 12 1 Ø 220~240 V 50 Hz
AHBW146A0 15.5 14 1 Ø 220~240 V 50 Hz
AHBW166A0 16.1 16 1 Ø 220~240 V 50 Hz
AHBW128A0 14.5 12 3 Ø 380~415 V 50 Hz
AHBW148A0 15.5 14 3 Ø 380~415 V 50 Hz
AHBW168A0 16.1 16 3 Ø 380~415 V 50 Hz

General Information
Installation Manual 9
ENGLISH
Accessories
Accessories supported by LG Electronics
To extend the functionality of , there are various external auxiliary apparatus called as
“accessories”.
They are classified by "accessories" and "3rd party accessories" 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
Thermostat
3way valve and actuator
To control by air temperature
To control water flow for hot water
heating or floor heating
Heating-Only type (1 Ø 230 V or 1 Ø 24V)
Cooling / Heating type
(1 Ø 230 V or 1 Ø 24 VAC with mode
selection switch)
3 wire, SPDT (Single Pole Double
Throw) type, 1 Ø ~ 230 V
Item Purpose Model
Sanitary water tank install kit
Remote air sensor
Dry contact
Sanitary water tank
To operate with sanitary water tank
To control by air temperature
To receive on & off external signal
To generate and store hot water
PHLTB
PQRSTA0
PQDSA (Installed)
PHS02060310 : 200 liter, Single heating coil,
1 Ø ~ 230 V 50 Hz 3 kW Electric heater
PHS02060320 : 200 liter, Double heating coil,
1 Ø ~ 230 V 50 Hz 3 kW Electric heater
PHS03060310 : 300 liter, Single heating coil,
1 Ø ~ 230 V 50 Hz 3 kW Electric heater
PHS03060320 : 300 liter, Double heating coil,
1 Ø ~ 230 V 50 Hz 3 kW Electric heater

General Information
10 Air-to-Water Heat Pump
If is installed with pre-existing boiler, the boiler and 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 unit. 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)
R
A
T
Outdoor Indoor
Floor heating loopFan coil unit
Radiator
High temperature Room thermostat(field supply)
2way valve
(field supply)
By-pass valve(field supply)
Low temperature
Expansion tank Strainer (Mesh: 1 mm × 1 mm)
Remote controller
E/T
Electric heater
E/H
S
R
Air vent
A
Typical Installation Example
Note:
• Room thermostat
- Type of thermostat and specification should be complied with chapter 6 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 valve and specification should be complied with chapter 6 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.

General Information
Installation Manual 11
ENGLISH
CASE 2:
Connecting sanitary water tank
R
T
Outdoor Indoor
Floor heating loopFan coil unit
Sanitary
water
tank
Hot water
City water
Radiator
A
High temperature Room thermostat(Field supply)
2way valve
(Field supply)
3way valve
(Field supply)
By-pass valve(Field supply)
Low temperature
Expansion tank
Air vent
Strainer
(mesh: 1 mm × 1 mm)
Remote controller
E/T
Electric heater
E/H
A
S
R
Note:
• Electric heater
- Type of electric heater and specification
should be complied with chapter 6 of installation manual.
• 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 6 of
installation manual.

General Information
12 Air-to-Water Heat Pump
CASE 3 : Connecting heat emitters for heating
(Under floor loop, Fan coil unit, and Radiator)
R
T
Outdoor Indoor
Floor heating loop
Sanitary
water
tank
Hot water
City water
Radiator
A
S
E/T
High temperature Room thermostat(Field supply)
2way valve
(Field supply)
3way valve
(Field supply)
By-pass valve(Field supply)
Low temperature
Expansion tank
(Field supply)
Air vent
Strainer
(mesh: 1 mm × 1 mm)
(Field supply)
Remote controller
E/T
Electric heater
E/H
A
S
R
Note:
• 3way valve
- Type of 3way valve and specification should be complied with chapter 6 of
installation manual.
• Sanitary water tank
- It should be equipped with internal electric heater to generate sufficient heat energy in very cold
season.
※
Strainer, Expansion tank are not provided.

General Information
Installation Manual 13
ENGLISH
Cycle Diagram
As is Air-to-Water heat pump, there are two different fluids cycling inside the system :
one is refrigerant, and the other is water. The refrigerant cycle and the water cycle are shown below.
AHBW036H0
Th7
: Heating
[Accumulator]
[Inv. Comp]
High
Pressure
Sensor
EEV
Th5
Th4
Th6
Water Pump
Th8
Th9
Th2
Th3
<Water Side><Refrigerant Side>
<Inside of Monobloc Product>
[PHE]
EXP/Tank, E/Heater, Strainer, F/Switch are
not provided in product
❈
EXP / TANK
Under-floor
Heating
Radiator
City Water
Shower
W / TANK
3WAY V / V_1
Unit
(Monobloc )
B / HT
<Field Installation>
Th11
Remote Room
Temperature Sensor
(accessory)
<LG Supply>
<Accessory>
Sanitary water tank
is installed.
(Sanitary water tank kit
is necessary)
<Basic Installation>
Field installation parts are not provided in product
Th12
Solar therm
al component
W/PUMP_2
3WAY V / V_2
Solar thermal system
Solar panel
Th13
Solar thermal system is connected.
(Solar thermal kit is necessary)
Strainer

General Information
14 Air-to-Water Heat Pump
AHBW***A0
F/SStrainer Th8
Expansion Tank
Relief
valve
Pressure
Gage
Air Purge
Electric
Heater &
Tank
W/Pump
Th10
Th9
Th7
: Heating
[Accumulator]
[Inv. Comp]
High
Pressure
Sensor
EEV
Th5
Th4
Th6
Th2
Th3
<Water Side><Refrigerant Side>
<Inside of Monobloc Product>
[PHE]
Fan
Coil
Unit
Under-floor
Heating
Radiator
3WAY V / V_1
2WAY V / V
Unit
(Monobloc)
<Field Installation>
Th11
Remote Room
Temperature Sensor
(accessory)
<LG Supply>
<Accessory> Solar thermal system is connected.
(Solar thermal kit is necessary)
Sanitary water tank
is installed.
(Sanitary water tank
kit is necessary)
<Basic Installation> Field installation parts are not provided in product❈
City Water
Shower
W/Tank
Th12
B / HT
Solar therm
al component
W/PUMP_2
3WAY V / V_2
Solar thermal system
Solar panel
Th13

General Information
Installation Manual 15
ENGLISH
Description (AHBW***A0)
Category Symbol Meaning PCB
Connector Remarks
Unit
Th2 Inlet evaporator temperature
sensor CN_PIPE/IN - Discription is expressed based on
cooling mode
Th3 Outlet evaporator temperature
sensor CN_PIPE/OUT
Th4 Compressor suction pipe
temperature sensor CN_TH2 - Th4 and Th5 are connected at 4
pin type connector CN_TH2
Th5 Compressor discharge pipe
temperature sensor
Th6 Condenser temperature
sensor CN_TH1
- Description is expressed based
on cooling mode
- Th6 and Th7 are connected at 4
pin type connector CN_TH1
TH7 Check Points, Maintenance
and Troubleshooting
Th8 Entering water temperature
sensor
CN_TH3 - Th8 and Th9 are connected at 6
pin type connector CN_TH3
Th9 Interim water temperature
sensor
Th10 Leaving water temperature
sensor
Th11 Remote air temperature
sensor CN_ROOM
- Optional accessory
(sold separately)
- Model: PQRSTA0
EXP/TANK Expansion tank (no connector) - Absorb volume change of heated
water,
E/HT Electric Heater CN_E/HEAT(A)
CN_E/HEAT(B)
- 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 E/HEAT(A) and E/HEAT(B) are
supplied by external power source
via magnetic switch connector
and ELB.
EEV Electronic Expansion Valve CN_LEV1
W/Pump_1 Internal water pump
CN_W/PUMP(A)
- Operating power (1 Ø 230 V 50
Hz) of internal water pump is
supplied by the connector
F/S Flow switch (no connector)
Strainer Strainer (no connector) - Filtering and stacking particles
inside circulating water

General Information
16 Air-to-Water Heat Pump
Category Symbol Meaning PCB
Connector Remarks
Field
Installation
2WAY V/V To control water flow for Fan
Coil Unit CN_2WAY(A)
- 3rd party accessory and field
installation (sold separately)
- 2wire NO or NC type 2way valve
is supported.
Th12 W/TANK water temperature
sensor CN_TH4
- Th12 and Th13 are connected at
4pin type connector CN_TH4
- Th12 is a part of sanitary water
tank kit. (model: PHLTA)
- Th13 is a part of solar thermal kit.
(model: PHLTA)
Th13 Solar-heated water
temperature sensor CN_TH4
W/TANK Sanitary water tank (no connector)
- 3rd party accessory and field
installation (sold separately)
- Generating and storing sanitary
hot water by AWHP or built-in
electric heater
B/HT Electric heater CN_B/HEAT(A)
- 3rd party accessory and field
installation
(usually built-in at W / TANK)
- Supplying additional water
heating capacity
3 WAY
V/V_1
- Flow control for water which
is leaving from unit
- Flow direction switching
between under-floor and
water tank
CN_3WAY(A)
- 3rd party accessory and field
installation (sold separately)
- SPDT type 3way valve is
supported
3WAY
V/V_2
- Flow control for water which
is heated and circulated by
SOLAR THERMAL
SYSTEM.
- Flow direction switching
between SOLAR THERMAL
SYSTEM and W/TANK
CN_3WAY(B)
- 3rd party accessory and Field
installation (sold separately)
- SPDT type 3way valve is
supported.
W_PUMP_2 External Water Pump CN_W/PUMP
(B)
- 3rd party accessory and Field
installation (sold separately)
- If water pump of SOLAR
THERMAL SYSTEM is incapable
of circulation,external water pump
can be used.
SOLAR
THE
RMAL
SYSTEM
This system can include
following components
: 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.
(no connector) - 3rd party accessory and Field
installation (sold separately)
City Water Water to be heated by unit
and B/HT of W/TANK (no connector) - Field installation
Shower Water supplied to end-user (no connector) - Field installation

General Information
Installation Manual 17
ENGLISH
Description (AHBW036H0)
Category Symbol Meaning PCB
Connector Remarks
Unit
Th2 Inlet evaporator temperature
sensor CN_PIPE/IN
- Discription is expressed based on
cooling mode
Th3 Outlet evaporator temperature
sensor CN_PIPE/OUT
Th4 Compressor suction pipe
temperature sensor
CN_TH2 - Th4 and Th5 are connected at 4
pin type connector CN_TH2
Th5 Compressor discharge pipe
temperature sensor
Th6 Condenser temperature
sensor
CN_TH1
- Description is expressed based
on cooling mode
- Th6 and Th7 are connected at 4
pin type connector CN_TH1
TH7 Air temperature sensor
(Outdoor)
Th8 Entering water temperature
sensor
CN_TH3 - Th8 and Th9 are connected at 6
pin type connector CN_TH3
Th9 Leaving water temperature
sensor
Th11 Remote air temperature
sensor CN_ROOM
- Optional accessory
(sold separately)
- Model: PQRSTA0
EEV Electronic Expansion Valve CN_LEV1
W/Pump_1 Internal water pump
CN_W/PUMP(A)
- Operating power (1 Ø 230 V 50
Hz) of internal water pump is
supplied by the connector

General Information
18 Air-to-Water Heat Pump
Category Symbol Meaning PCB
Connector Remarks
Field
Installation
Th12 W/TANK water temperature
sensor
CN_TH4
- Th12 and Th13 are connected at
4pin type connector CN_TH4
- Th12 is a part of sanitary water
tank kit. (model: PHLTA)
- Th13 is a part of solar thermal kit.
(model: PHLTA)
Th13 Solar-heated water
temperature sensor
CN_TH4
F/S Flow switch (no connector)
Strainer Strainer (no connector) - Filtering and stacking particles
inside circulating water
W/TANK Sanitary water tank (no connector)
- 3rd party accessory and field
installation (sold separately)
- Generating and storing sanitary
hot water by AWHP or built-in
electric heater
3WAY
V/V_1
- Flow control for water which
is leaving from unit
- Flow direction switching
between under-floor and
water tank
CN_3WAY(A
- 3rd party accessory and field
installation (sold separately)
- SPDT type 3way valve is
supported
3WAY
V/V_2
- Flow control for water which
is heated and circulated by
SOLAR THERMAL
SYSTEM.
- Flow direction switching
between SOLAR THERMAL
SYSTEM and W/TANK
CN_3WAY(B)
- 3rd party accessory and Field
installation! (sold separately)!
- SPDT type 3way valve is
supported
W_PUMP/2 External Water Pump CN_W/PUMP
(B)
- 3rd party accessory and Field
installation (sold separately)
- If water pump of SOLAR
THERMAL SYSTEM is incapable
of circulation,external water pump
can be used.
City Water Water to be heated by unit
and B/HT of W/TANK (no connector) - Field installation
Shower Water supplied to end-user (no connector) - Field installation
SOLAR
THERMAL
SYSTEM
This system can include
following components
: 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.
(no connector) - 3rd party accessory and Field
installation (sold separately)

General Information
Installation Manual 19
ENGLISH
Parts and Dimensions
UN3 chassis
Description
No Name Remarks
1 Entering water pipe PT 25.4mm(Female type)
2 Leaving water pipe PT 25.4mm(Female type)
3 Strainer Filtering and stacking particles inside circulating water
4 Top cover -
5 Control box PCB and terminal blocks
6 Plate heat exchanger Heat exchange between refrigerant and water
7 Water pump -
8 Pressure gage Indicates circulating water pressure
9 Safety valve Open at water pressure 3 bar
10 Compressor -

General Information
20 Air-to-Water Heat Pump
UN4 chassis
Description
No Name Remarks
1 Entering water pipe PT 25.4mm(Female type)
2 Leaving water pipe PT 25.4mm(Female type)
3 Strainer Filtering and stacking particles inside circulating water
4 Top cover -
5 Control box PCB and terminal blocks
6 Plate heat exchanger Heat exchange between refrigerant and water
7 Water pump -
8 Pressure gage Indicates circulating water pressure
9 Safety valve Open at water pressure 3 bar
10 Compressor -
This manual suits for next models
2
Table of contents
Other LG Air Conditioner manuals

LG
LG A122CL NB0 User manual

LG
LG LS090HEV Installation and user guide

LG
LG DELUXE HIGH WALL MINI SPLIT User manual

LG
LG ATNH24GPLE2 User manual

LG
LG ARNU153TQC2 User manual

LG
LG MULTI V MINI ARUN047GS2 User manual

LG
LG UU70W User manual

LG
LG S3228P NV2 User manual

LG
LG LWG07 Series User manual

LG
LG AT-C186PLE1 User manual