LG THERMA V User manual

www.lg.com
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.
Original instruction
[ Representative ] LG Electronics Inc. EU Representative : LG Electronics European Shared
Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,
Changwon-si, Gyeongsangnam-do, KOREA
For more information, Refer to the CD or LG Web site (www.lg.com).
INSTALLATION MANUAL
AIR-TO-WATER
HEAT PUMP
P/NO : MFL68681810
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 1

Air-to-Water Heat Pump Installation Manual
TABLE OF CONTENTS
PREFACE.............................................................................................................................5
1. SAFETY PRECAUTION ...................................................................................................6
WARNING .....................................................................................................................................6
INSTALLATION WARNING .....................................................................................................6
OPERATION WARNING .........................................................................................................7
CAUTION ......................................................................................................................................9
INSTALLATION CAUTION ......................................................................................................9
OPERATION CAUTION ..........................................................................................................9
2. INSTALLATION PART ...................................................................................................10
INDOOR UNIT BOX ....................................................................................................................10
OUTDOOR UNIT BOX ................................................................................................................10
3. GENERAL INFORMATION ............................................................................................11
MODEL INFORMATION ..............................................................................................................11
TYPICAL INSTALLATION EXAMPLE .........................................................................................13
CASE 1..................................................................................................................................13
CASE 2..................................................................................................................................14
CASE 3 .................................................................................................................................15
CYCLE DIAGRAM ......................................................................................................................16
WATER CYCLE .....................................................................................................................17
PARTS AND DIMENSIONS ........................................................................................................19
INDOOR UNIT (EXTERNAL) ................................................................................................19
INDOOR UNIT (INTERNAL)..................................................................................................20
OUTDOOR UNIT (EXTERNAL) ............................................................................................22
CONTROL PARTS ......................................................................................................................24
CONTROL BOX : INDOOR UNIT..........................................................................................24
CONTROL PANEL ................................................................................................................25
WIRING DIAGRAM : INDOOR AND OUTDOOR (INCL. FIELD WIRING) ............................26
4. INSTALLATION OF OUTDOOR UNIT ...........................................................................28
CONDITIONS WHERE OUTDOOR UNIT IS INSTALLED..........................................................28
DRILL A HOLE IN THE WALL .....................................................................................................28
INSTALLATION AT SEASIDE......................................................................................................29
SEASONAL WIND AND CAUTIONS IN WINTER.......................................................................29
5. INSTALLATION OF INDOOR UNIT ...............................................................................30
CONDITIONS WHERE INDOOR UNIT IS INSTALLED..............................................................30
GENERAL CONSIDERATIONS ............................................................................................30
SERVICE SPACE..................................................................................................................30
2Air-to-Water Heat Pump
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MOUNTING TO WALL ..........................................................................................................31
WATER VOLUME AND WATER PUMP CAPACITY..............................................................32
PRESSURE DROP ...............................................................................................................34
WATER VOLUME AND EXPANSION VESSEL PRESSURE................................................35
WATER QUALITY .................................................................................................................36
FROST PROTECTION..........................................................................................................36
6. PIPING AND WIRING FOR OUTDOOR UNIT ...............................................................37
REFRIGERANT PIPING .............................................................................................................37
CONSTRAINTS IN PIPE LENGTH AND ELEVATION ..........................................................37
PREPARATION FOR PIPING ...............................................................................................38
CONNECTING PIPE TO INDOOR UNIT ..............................................................................39
CONNECTING PIPE TO OUTDOOR UNIT ..........................................................................39
CIRCUIT BREAKER SPECIFICATION .................................................................................42
WIRING PROCEDURE FOR POWER CABLE AND CONNECTING CABLE.......................43
FINALIZING ................................................................................................................................44
PIPE FORMING ....................................................................................................................44
LEAKAGE TEST AND EVACUATION .........................................................................................45
PREPARATION .....................................................................................................................45
LEAKAGE TEST....................................................................................................................45
EVACUATION........................................................................................................................46
7. PIPING AND WIRING FOR INDOOR UNIT ...................................................................47
WATER PIPING AND WATER CIRCUIT CONNECTION............................................................47
GENERAL CONSIDERATIONS ............................................................................................47
WATER PIPING AND WATER CIRCUIT CONNECTION......................................................47
WATER CHARGING .............................................................................................................49
PIPE INSULATION ................................................................................................................49
ELECTRICAL WIRING................................................................................................................50
GENERAL CONSIDERATION...............................................................................................50
TERMINAL BLOCK INFORMATION .....................................................................................51
CONNECTING WITH OUTDOOR UNIT ...............................................................................52
ELECTRIC HEATER WIRING ...............................................................................................52
8. ACCESSORIES INSTALLATION...................................................................................53
ACCESSORIES SUPPORTED BY LG Electronics ...............................................................53
ACCESSORIES SUPPORTED BY 3rd PARTY COMPANIES ..............................................53
BEFORE INSTALLATION ...........................................................................................................54
THERMOSTAT ............................................................................................................................54
GENERAL INFORMATION ...................................................................................................54
HOW TO WIRE THERMOSTAT ............................................................................................55
FINAL CHECK.......................................................................................................................56
DHW TANK AND DHW TANK KIT/SOLAR THERMAL KIT.........................................................57
GENERAL INFORMATION ...................................................................................................57
Installation Manual 3
ENGLISH
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HOW TO INSTALL DHW TANK.............................................................................................58
HOW TO INSTALL DHW TANK KIT ......................................................................................59
HOW TO WIRE DHW TANK HEATER ..................................................................................61
HOW TO INSTALL SOLAR THERMAL KIT...........................................................................62
DRY CONTACT...........................................................................................................................62
REMOTE TEMPERATURE SENSOR.........................................................................................62
3WAY VALVE ..............................................................................................................................63
HOW TO WIRE 3WAY VALVE...............................................................................................63
FINAL CHECK.......................................................................................................................63
2WAY VALVE ..............................................................................................................................64
GENERAL INFORMATION ...................................................................................................64
HOW TO WIRE 2WAY VALVE...............................................................................................64
FINAL CHECK.......................................................................................................................64
CONDITIONS IF ACCESSORIES ARE INSTALLED ..................................................................65
THERMOSTAT ......................................................................................................................65
REMOTE AIR TEMPERATURE SENSOR ............................................................................65
DHW TANK AND DHW TANK KIT / SOLAR THERMAL KIT .................................................66
9. SYSTEM SET-UP ...........................................................................................................68
DIP SWITCH SETTING...............................................................................................................68
GENERAL INFORMATION ...................................................................................................68
DIP SWITCH INFORMATION ...............................................................................................69
INSTALLER SETTING ................................................................................................................72
HOW TO ENTER INSTALLER SETTING MODE ..................................................................72
SUMMARY ............................................................................................................................73
COMMON SETTING .............................................................................................................74
TEMPERATURE RANGE SETTING .....................................................................................75
TEMPERATURE CONTROL PARAMETER SETTING .........................................................76
10. CHECK POINTS, MAINTENANCE AND TROUBLESHOOTING................................81
CHECK LIST BEFORE STARTING OPERATION .....................................................................81
MAINTENANCE.........................................................................................................................82
TEST RUN.................................................................................................................................82
CHECK BEFORE TEST RUN ..............................................................................................82
TROUBLESHOOTING...............................................................................................................83
TROUBLESHOOTING FOR PROBLEM WHILE OPERATION.............................................83
TROUBLESHOOTING FOR ERROR CODE ........................................................................84
AIRBORNE NOISE EMISSION .................................................................................................85
LIMITING CONCENTRATION ...................................................................................................85
4Air-to-Water Heat Pump
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Preface
Installation Manual 5
ENGLISH
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.
• Items Inside product Box
• Before starting installation, please make it sure that all parts are found
inside the product box.
• 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 4
Chapter 3
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
REMARK : ALL CONTENTS OF THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE.
TO GET THE LATEST INFORMATION, PLEASE VISIT LG ELECTRONICS WEB SITE.
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 5

Safety Precautions
6Air-to-Water Heat Pump
1. Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
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.
WARNING
CAUTION
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.
WARNING
Installation
• 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
• 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
• For antifreeze, always contact the dealer or an authorized service center.
- Almost the antifreeze is a toxic product.
• For installation, always contact the dealer or an authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 6

Safety Precautions
Installation Manual 7
ENGLISH
• 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 install the water pipe system as Open loop type.
- It may cause failure of unit.
• Use a vacuum pump or inert (nitrogen) gas when doing leakage test or purging air. Do not
compress air or oxygen and do not use flammable gases.
- There is the risk of death, injury, fire or explosion.
• Make sure the connected condition of connector in product after maintenance.
- Otherwise, it may causeproduct damage
• Do not touch leaked refrigerant directly.
- There is risk of frostbite.
Operation
• 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.
• 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.
- It may cause damage to the unit. When flammable gas
• leaks, turn off the gas and open a window for ventilation before turning the unit on.
- There is risk of explosion or fire.
• If strange sounds, or small 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.
• Do not touch any electric part with wet hands. you should be power off before touching electric part.
- There is risk of electric shock or fire.
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8Air-to-Water Heat Pump
Safety Precautions
• Do not touch refrigerant pipe and water pipe or any internal parts while the unit is operating or
immediately after operation.
- There is risk of burns or frostbite, personal injury.
• If you touch the pipe or internal parts, you should be wear protection or wait time to return to normal
temperature.
- Otherwise , it may cause burns or frostbite, personal injury.
• Turn the main power on 6 hours ago before the product starting operation.
- Otherwise, it may cause compressor damage.
• Do not touch electric parts for 10 minutes after main power off.
- There is risk of physical injury, electric shock.
• The inside heater of product may operate during stop mode. It is intended to protect the product.
• Be careful that some part of the control box are hot.
- There is risk of physical injury or burns.
• 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.
• 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.
• 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.
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Installation Manual 9
ENGLISH
Safety Precautions
CAUTION
Installation
• Always check for gas (refrigerant) leakage after installation or repair of unit.
- Low refrigerant levels may cause failure of unit.
• Keep level even when installing the unit.
- To avoid vibration or water leakage.
• Use two or more people to lift and transport the unit.
- Avoid personal injury.
Operation
• Do not use the unit for special purposes, such as preserving foods, works of art, etc.
- There is risk of damage or loss of property.
• 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.
• Use a firm stool or ladder when cleaning or maintaining the unit.
- Be careful and avoid personal injury.
• Do not turn on the breaker or power under condition that front panel cabinet, top cover, control box
cover are removed or opened.
- Otherwise it may cause fire, electric shock, explosion or death.
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10 Air-to-Water Heat Pump
2. Installation Part
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
2
1
Shut-off valve 2
1
1
Item Image Quantity Item Image Quantity
Installation
Manual Installation
Sheet
Owner's
Manual
Remote
controller
remover
Outdoor Unit
U4 Chassis
(Product heating capacity :
5kW, 7kW, 9kW)
Item Image Quantity
OUTDOOR UNIT BOX
1
1
Outdoor Unit
U3 Chassis
(Product heating capacity :
12kW, 14kW, 16kW)
www.lg.com
Pleaseread this installation manual completely before installing the product.
Installationwork must be performed in accordance with the national wiring
standardsby authorized personnel only.
Pleaseretain this installation manual for future reference after reading it
thoroughly.
INSTALLATIONMANUAL
AIR-TO-WATER
HEAT PUMP
www.lg.com
Pleaseread this manual carefully before operating
yourset and retain it for future reference.
OWNER’S MANUAL
AIR-TO-WATER
HEAT PUMP
Installation Part
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Installation Manual 11
ENGLISH
General Information
3. 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
AHUW 0 9 6 A 3
Series Number
Function
A : General heating heat pump
Function
A : General heating heat pump
Electrical ratings
6 : 1 phase 220-240V AC 50Hz 8 : 3 phase 380-415V AC 50Hz
Heating Capacity (kW)
05 : 5kW 07 : 7kW 09 : 9kW 12 : 12kW
14 : 14kW 16 : 16kW
Model Type
W : Inverter Heat Pump
Classification
U : Outdoor Unit
Air-to-Water Heat Pump for R410A
AH N W 1 6 6 0 6 A 3
Heater Electrical ratings
6 : 1 phase 220-240V AC 50Hz
8 : 3 phase 380-415V AC 50Hz
Heating Capacity (kW)
09 : 9kW 16 : 16kW
Heater Capacity (kW)
06 : 6kW 09 : 9kW
Model Type
W : Inverter Heat Pump
Classification
N : Indoor Unit
Air-to-Water Heat Pump for R410A
3. Series
Series Number
3. Series
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12 Air-to-Water Heat Pump
General Information
*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
Model Name Built-In Electric
Heater(kW)
Power Source
(Electric Heater)
Capacity Power Source
(Unit)
Outdoor Unit Indoor Unit Heating(kW)*1 Cooling(kW)*2
AHUW056A3 5.0 5.0
AHUW076A3 7.0 7.0
AHUW096A3 AHNW16606A3 6(3+3) 220-240 V ~ 50 Hz 9.0 9.0 220-240 V ~ 50 Hz
AHUW126A3 12.0 10.4
AHUW146A3 14.0 12.0
AHUW166A3 16.0 13.0
AHUW128A3 12.0 10.4
AHUW148A3 AHNW16809A3 9(3+3+3) 380-415 V ~ 50 Hz 14.0 12.0 380-415 V ~ 50 Hz
AHUW168A3 16.0 13.0
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General Information
Installation Manual 13
ENGLISH
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 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.
CAUTION
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.
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CASE 2: Connecting DHW Tank
Outdoor Indoor
Outdoor Unit
Indoor Unit
Floor heating loopFan coil unit
DHW
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:
• DHW tank
- It should be equipped with internal electric heater to generate sufficient heat energy in very cold
season.
- DHW : Domestic Hot Water
• 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
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General Information
CASE 3: Connecting Solar thermal system
Solar heat source
Outdoor Indoor
Outdoor Unit
Indoor Unit
Floor heating loopFan coil unit
DHW
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:
• DHW tank
- It should be equipped with internal electric heater to generate sufficient heat energy in very cold
season.
- DHW : Domestic Hot Water
• Pump
- Maximum power consumption of pump should be less than 0.25kW.
Installation Manual 15
ENGLISH
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16 Air-to-Water Heat Pump
Cycle Diagram
Description
GAS SIDE
Service
Valve
(3 way)
EEV
Service
Valve
(3 way)
Indoor Unit
Plate Heat
Exchanger Th2
Th3
Water. Out
Water. In
TH1
(Accessories)
TH6
TH4
Pressure
Sensor
Accumulator
Compressor
4 way
Valve
TH5
TH7
TH8
Outdoor Unit
Heat Exchanger
LIQUID SIDE
General Information
Category Symbol Meaning PCB
Connector Remarks
Indoor
Unit
Th1 Remote air temperature sensor CN_ROOM - Optional accessory (being sold separately)
- Not shown in diagram
Th2 Inlet evaporator temperature sensor CN_PIPE_IN - Meaning is expressed based on Cooling
mode.
Th3 Outlet evaporator temperature sensor CN_PIPE_OUT
Outdoor
Unit
Th4 Compressor-suction pipe temperature sensor CN_SUCTION
Th5 Compressor-discharge pipe temperature sensor CN_DISCHA
Th6 Condenser temperature sensor CN_C_PIPE - Description is expressed based on Cooling
mode.
Th7 Outdoor air temperature sensor CN_AIR
Th8 Condenser middle temperature sensor CN_MID
EEV Electronic Expansion Valve CN_LEV1
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 16

General Information
Water cycle
Basic installation
(IDU + ODU)
Solar
Thermal
Componets
DHW Tank
Fan
Coil
Unit
Underfloor
Heating
Radiator
DHW Tank is
Installed
(DHW tank is
Necessary)
Solar thermal system is
connected
(Solar thermal kit is
necessary)
Installation Manual 17
ENGLISH
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 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).
- Water Pump is connected at CN_MOTOR1
- 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 DHW 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_IN
CN_TH3
CN_FLOW1
CN_E/HEAT(A)
CN_E/HEAT(B)
CN_MOTOR1
(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’)
DHW 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.
- 3
rd
party accessory and Field installation
(sold separately)
- 2 wire 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 DHW tank kit.
(Model:PHLTA)
- TH7 is a part of solar thermal kit
(Model:PHLLA)
18 Air-to-Water Heat Pump
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 18

General Information
Parts and Dimensions
Indoor unit(External)
850315
490
490
315
Description
Installation Manual 19
ENGLISH
No Name Remark
1 Control Panel Built-in Remote Controller
(unit: mm)
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 19

General Information
Indoor unit(Internal)
484
289.6
484
12311684.5
63.4
36.9 46.4
76 41
847.8
20 Air-to-Water Heat Pump
(unit:mm)
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 20