LG THERMA V Series User manual

Air-to-Water Heat Pump
Original instruction
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.
INSTALLATION MANUAL
AIR-TO-WATER
HEAT PUMP
MFL69676201
Rev.01_050219
www.lg.com
Copyright © 2016 - 2019 LG Electronics Inc. All Rights Reserved.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

2Air-to-Water Heat Pump
Table of contents
3 IMPORTANT INFORMATION
3 Symbols
4 General
4 Safety warnings and instructions
8 Obligations of the manufacturer
8 Obligations of the installer during installation
8 Obligations of the user
9 INSTALLATION PART
10 GENERAL INFORMATION
10 Model Information
12 Parts and Dimensions
15 INSTALLATION OF OUTDOOR UNIT
15 Conditions where Outdoor Unit is Installed
16 Set up and connection of the external sensor
16 Drill a Hole in the Wall
17 Installation at Seaside
17 Seasonal wind and cautions in winter
18 INSTALLATION OF INDOOR UNIT
18 General
19 Location of the device
21 Connection with the outdoor unit
25 Hydraulic connection
34 Electrical connection
47 Refrigerant Piping
47 PIPING AND WIRING FOR OUTDOOR UNIT
56 Finalizing
57 Leakage test and Evacuation
59 SYSTEM SET-UP
59 DIP Switch Setting
60 CHECK POINTS, MAINTENANCE AND
TROUBLESHOOTING
60 Check List before Starting Operation
61 Care and Maintenance
63 Test Run
63 Limiting concentration
64 SEARCH THE MANUAL USING YOUR MOBILE
64 Airborne Noise Emission
TABLE OF CONTENTS

Installation Manual 3
ENGLISH
The manual describes the process of installation and maintenance of the device. The installation
and maintenance can only be performed by qualified personnel. Read the manual carefully before
the installation, this way you will be informed about the intended use, functionality and process of
handling the device.
• The manual has to be handed over to the end user after installation.
• If this product is being handed over to a third person, ensure that you provide them with this
manual too.
Definitions
• An informed person is a person who reads this manual.
• A qualified person has a certificate of expert qualifications.
• The authorized technician is trained and authorized by the manufacturer to perform maintenance
and servicing of the device.
• The user uses the device according to its use.
• The installer is a person professionally trained for performing hardware and/or electric installation
work and mounting of the device.
Incorrect use of the device can lead to damage to the device, property or injury to the user. To
reduce risk, the manual points out important information with the use of symbols.
These symbols indicate various risks for the user or the device.
A notice holding important information regarding requirements of the manufacturer
and the device.
Important information
Symbols
Important information
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.

Important information
4Air-to-Water Heat Pump
• Read Owner’s manual and Installation manual before installation.
• Any altering or replacement of original components of the device voids the
manufacturer’s guarantee for safe and functional operation. The
manufacturer is not responsible for the consequences and will not
acknowledge claims for damages in these cases of undesignated and
incorrect use of the device. The user is solely responsible for injuries and
damages on the device itself or on other objects resulting from undesignated
and incorrect use of the device.
• The installation of the device has to be performed in accordance with the
manual; otherwise the manufacturer does not acknowledge the warranty.
• High pressure can cause to safety valve to leak water. Make sure the
drainage pipe is open to atmospheric pressure.
• Failure to comply with the manual and good practice while connecting the
device to the power supply can lead to serious injury or death.
• Connecting the device to the power source can only be performed by a
qualified personnel.
• It is prohibited to move, shift, clean or service the device while in operation.
• It is prohibited to play with the device. Children are not allowed to clean the
device without supervision.
• The device can be operated independently only by informed persons who
are familiar with the safe operation of the device and understand possible
hazards of its operation. Children older than 8 and people with reduced
physical and mental capacities and with lack of experience and knowledge
can only operate the device under the supervision of an informed person.
• Before installation and any further adjustments to the device it is necessary
to consider the manual for safe use and maintenance.
• The installation has to be performed in accordance with national regulations
on electrical installations and with the instructions of the manufacturer. It has
to be performed by a professionally trained person.
• It has to be made sure that the device does not endanger anybody. Access
Safety warnings and instructions
General

Important information
Installation Manual 5
ENGLISH
to the device has to be denied to children and persons who are not informed
about the operation of the device.
• The device must never be cleaned with cleaning agents containing sand,
soda, acid or chlorides because these might damage the surface of the
device.
• The device contains fluorinated greenhouse gas. Hence, installation,
servicing and working with the coolant/device can only be performed by the
authorised personnel. While performing works on the device it is necessary
to prevent the leaking of the refrigerant into the atmosphere.
• It is necessary to consider all technical data and instructions in this manual
including all warnings and notes during planning, design, installation and use
of the device.
• Electrical installations have to be inspected in accordance with regulations
on requirements for low voltage in buildings by a qualified personnel.
• Connecting the devices power cable must be performed by a qualified
electrician. The device must be disabled during the procedure.
• In case the power cable of the device is damaged, it has to be replaced. The
replacement can only be performed by the manufacturer and authorized
maintenance worker.
• Before opening the device disconnect all electrical circuits and make sure
the device is not under voltage.
• Do not use a defective or underrated circuit breaker. Use this appliance on a
dedicated circuit.
• For electrical work, contact the dealer, seller, a qualified electrician, or an
Authorized Service Center.
• Always ground the unit.
• Install the panel and the cover of control box securely.
• Always install a dedicated circuit and breaker.
• Use the correctly rated breaker or fuse.
• Do not modify or extend the power cable.
• Do not install, remove, or reinstall the unit by yourself (customer).
• For antifreeze, always contact the dealer or an authorized service center.
• For installation, always contact the dealer or an Authorized Service Center.
• Do not install the unit on a defective installation stand.
• Be sure the installation area does not deteriorate with age.
• Do not install the water pipe system as Open loop type.
• 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.
• Make sure the connected condition of connector in product after
maintenance.

6Air-to-Water Heat Pump
• Do not touch leaked refrigerant directly.
• Take care to ensure that power cable could not be pulled out or damaged
during operation.
• Do not place anything on the power cable.
• Do not plug or unplug the power supply plug during operation.
• Do not touch (operate) the unit with wet hands.
• Do not place a heater or other appliances near the power cable.
• Do not allow water to run into electric parts.
• Do not store or use flammable gas or combustibles near the unit.
• Do not use the unit in a tightly closed space for a long time.
• When flammable gas leaks, turn off the gas and open a window for
ventilation before turning the unit on.
• If strange sounds, or small or smoke comes from unit, turn the breaker off or
disconnect the power supply cable.
• Stop operation and close the window in storm or hurricane. If possible,
remove the unit from the window before the hurricane arrives.
• Do not open the front cover of the unit while operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• Do not touch any electric part with wet hands. you should be power off
before touching electric part.
• Do not touch refrigerant pipe and water pipe or any internal parts while the
unit is operating or immediately after operation.
• If you touch the pipe or internal parts, you should be wear protection or wait
time to return to normal temperature.
• Turn the main power on 6 hours ago before the product starting operation.
• Do not touch electric parts for 10 minutes after main power off.
• 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.
• When the unit is soaked (flooded or submerged), contact an Authorized
Service Center.
• Be cautious that water could not be poured to the unit directly.
• Ventilate the unit from time to time when operating it together with a stove,
etc.
• Turn the main power off when cleaning or maintaining the unit.
• Take care to ensure that nobody could step on or fall onto the unit.
• For installation, always contact the dealer or an Authorized Service Center.
• If the unit is not used for long time, we strongly recommend not to switch off
the power supply to the unit.
Important information

Installation Manual 7
ENGLISH
Important information
• Putting any kinds of items on or next to the device is prohibited.
• The device must not be placed in a room where it cannot be removed. Later
walling or setting up of other obstacles next to the device is forbidden.
• For the correct operation of the device, the electrical distributor has to
provide electricity of adequate quality (SIST EN 50160). In normal conditions
this is within ± 10 % of the rated voltage. The data about the state of the
electrical grid have to be acquired from the electrical distributor.
• Connecting the device to the electric grid has to be performed in accordance
with the standards. The device has to be connected to the electric grid via
the power supply cut-off which is installed into the electrical installation
under the regulations in force. The power supply cut-off has to separate all
contacts under the regulations of the overvoltage category III.
• Always check for gas (refrigerant) leakage after installation or repair of unit.
• Keep level even when installing the unit.
• Use two or more people to lift and transport the unit.
• Do not use the unit for special purposes, such as preserving foods, works of
art, etc.
• Use a soft cloth to clean.
Do not use harsh detergents, solvents, etc.
• Do not step on or put anything on the unit.
• Use a firm stool or ladder when cleaning or maintaining the unit.
• Do not turn on the breaker or power under condition that front panel cabinet,
top cover, control box cover are removed or opened.
• The drainage hole of the safety valve must be directed downwards. Make
sure it does not freeze A yearly inspection of the safety valve is necessary to
ensure its proper operation; when performing it, remove lime deposits and
make sure the safety valve is not blocked.
• In order to avoid a hazard due to inadvertent resetting of the thermal cut-out,
this appliance must not be supplied through an external switching device,
such as a timer, or connected to a circuit that is regularly switched on and off
by the utility.

8Air-to-Water Heat Pump
Important information
The manufacturer guarantees that the device is in accordance with current European directives and
standards. The device is marked with the mark CE and it has all the necessary documentation.
We reserve the right to make changes to the manual without prior notice.
As manufacturer we do not take responsibility for the consequences arising from:
• Non-compliance with the manual for the device.
• Incorrect and/or inadequate maintenance of the device.
• Non-compliance with the manual for the installation of the device.
The installer is responsible for installing the device in accordance with the following requirements:
• To thoroughly study the instructions for use and installation accompanying the device before
installation.
• To install the device in accordance with the instructions and national legislation, policies and
standards in force.
For ensuring unobstructed and effective operation of the device the user has to follow the following
instructions:
• To thoroughly study the instructions for use and installation accompanying the device before use.
• To have a qualified and authorized installer perform the installation of the device.
• Ensure regular yearly inspections and maintenance of the device by the authorized maintenance
worker.
• Store this manual in an appropriate dry place close to the device.
Obligations of the user
Obligations of the installer during installation
Obligations of the manufacturer

Installation Manual 9
ENGLISH
Installation Part
Installation Part
Thank you for choosing LG Electronics Air-to-Water Heat Pump
Before starting installation, please ensure that all parts are found inside the product box.
INDOOR UNIT BOX
Item Image Quantity
Indoor unit
1
Installation Manual
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
CONDITIONER
1
Owner's Manual
www.lg.com
Pleaseread this manual carefully before operating
yourset and retain it for future reference.
OWNER’S MANUAL
AIR
CONDITIONER
1
OUTDOOR UNIT BOX
Item Image Quantity
Outdoor Unit
(Product heating capacity : 9 kW)
1
Outdoor Unit
(Product heating capacity :
12 kW, 14 kW, 16 kW)
1
Accessory Box
Item Image Quantity
Modbus Converter
(PP485B00K)
ON
12345678
1

10 Air-to-Water Heat Pump
General 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 for useful hints on installation techniques.
Model number nomenclature
Factory Model Name
AH N W 1660 6 B 0
Series Number
Function
B: DHW tank inegrated with Buffer tank
D: DHW tank integrated
Heater Capacity (kW)
06 : 6 kW
Heater Electrical ratings
6 : 1 phase 220-240 V AC 50 Hz
Heating Capacity (kW)
16 : 16 kW
Model Type
W : Inverter Heat Pump H : Heat Pump
Classification
N : Indoor Unit
Air-to-Water Heat Pump for R410A
AHUW 0 9 6 A 3
Series Number
Function
A : General heating heat pump
Electrical ratings
6 : 1 phase 220-240 V AC 50 Hz 8 : 3 phase 380-415 V AC 50 Hz
Heating Capacity (kW)
09 : 9 kW 12 : 12 kW
14 : 14 kW 16 : 16 kW
Model Type
W : Inverter Heat Pump
Classification
U : Outdoor Unit
Air-to-Water Heat Pump for R410A
3. Series
Model Information
General Information

Installation Manual 11
ENGLISH
General Information
Model name and related 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.
Buyer Model Name
HU09 1U4 3
Serial Number
Platform (Chassis code)
3 : U3 Chassis
4 : U4 Chassis
Classification
U : Outdoor unit of Split type
Electrical ratings
1 : 1Ø, 220-240 V AC 50 Hz
3 : 3Ø, 380-415 V AC 50 Hz
Heating capacity (kW)
Ex ) 9 kW : ‘09’
U : Outdoor unit
Classification
H : Air to water Heat Pump
HN161 6 T N B 0
Serial Number
Platform (Chassis code)
B : DHW tank integrated
Classification
N : Indoor unit of Split type
T : DHW tank integrated
Heater capacity (kW)
Heater electrical ratings
1 : 1Ø, 220-240 V, 50 Hz
6 : 6 kW Heater
Heating capacity (kW)
Ex ) 16 kW : ‘16’
N : Indoor unit
Classification
H : Air to water Heat Pump
Model Name Built-In Electric
Heater(kW)
Capacity Power Source
Outdoor Unit Indoor Unit Heating(kW)*1 Cooling(kW)*2
AHUW146A2
AHNW16606B0 1Φ 4(2+2)
3Φ 6(2+2+2)
14.0 11.0
220-240 V ~ 50 Hz
AHUW096A3 9.0 9.0
AHUW126A3 12.0 10.4
AHUW146A3 14.0 11.0
AHUW166A3 16.0 12.0
AHUW128A3 12.0 10.4
380-415 V ~ 50 HzAHUW148A3 14.0 11.0
AHUW168A3 16.0 12.0

12 Air-to-Water Heat Pump
General Information
Indoor unit
Parts and Dimensions
1Heating/Cooling Inlet ABuffer tank
2Heating/Cooling Outlet BCirculating pump
3Warm sanitary water CElectric flow heater
4DHW - circulation DTT3000 Controller
5Cold sanitary water - supply E Condenser
6Gas pipe 5/8‘‘– refrigerant F3 Way Valve
7Liquid pipe 3/8‘‘– refrigerant GDHW tank
8Mg. Anode
2 045 1 978
(unit:mm)

Installation Manual 13
ENGLISH
General Information
Outdoor unit(External)
Supporter
490
Description
No Name
1
2
3
Liquid-side Service Valve
Gas-side Service Valve
Air discharge Grill
Product Heating
Capacity :
12 kW,14 kW,16 kW
(unit:mm)

14 Air-to-Water Heat Pump
General Information
Supporter
Description
No Name
1
2
3
Liquid-side Service Valve
Gas-side Service Valve
Air discharge Grill
Product Heating
Capacity : 9 kW
(unit:mm)

Installation Manual 15
ENGLISH
Installation of Outdoor Unit
The outdoor unit of is installed outside to exchange heat with ambient air. Therefore, it
is important to properly secure the outdoor unit against harsh environmental conditions and
mechanical injuries. This chapter provides instructions to install the outdoor unit, make a route to
connect with the indoor, and precautionary measures to follow if installed around seaside.
• If a sunroof is built over the unit to prevent direct sunlight or rain exposure, make sure that heat
radiation from the heat exchanger is not restricted.
• Ensure that the spaces indicated by arrows around front, back and side of the unit.
• Do not place animals and plants in the path of the warm air.
• Consider weight of the outdoor unit into account and select a place where noise and vibration are
minimum.
• Select a place such that the warm air and noise from the outdoor unit do not disturb neighbors.
Conditions where Outdoor Unit is Installed
300
Fence or
obstacles
700
300
600
Sunroof
Minimum service space (unit:mm)
Installation of Outdoor Unit

16 Air-to-Water Heat Pump
Installation of Outdoor Unit
• For drilling a hole into the wall to connect a pipe
to connect pipe between the indoor unit and the
outdoor unit, please follow the below
instructions.
- Drill the piping hole with a Ø 70 mm hole core
drill.
- Piping hole should be slightly tilted to the
outdoor side to prevent raindrops from
entering indoors.
Wall
5~7 mm
Indoor Outdoor
Drill a Hole in the Wall
For controlling heating according to the external temperature, it is necessary to install the external
temperature sensor.
The sensor must be set up in a shady spot.
The sensor must not be set up above a window or door. It must be located away from heat
sources.
For measuring external temperature, the sensor type PT 1000 is used.
TTemperature sensor for external temperature.
The external sensor must be connected and should be watertight to prevent water penetration.
Set up and connection of the external sensor
Temperature sensor for external temperature.
The direction of connecting cables.

Installation Manual 17
ENGLISH
Installation of Outdoor Unit
Seasonal wind and cautions in winter
• Sufficient measures are required in a frozen area or chilly climates to facilitate efficient operation of the product.
• Take preemptive measures in case there is a seasonal wind or snow in winter.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit such that it does not come in contact with snow directly. If snow piles up and freezes on the
air suction hole, the system may malfunction. If it is installed in a snowy area, attach the hood to the system.
• Install the outdoor unit at the installation console higher by 500 mm than the average snowfall (annual average
snowfall) if it is installed at the area with heavy snowfall.
• Where snow is accumulated on the upper part of the Outdoor Unit by more than 100 mm, always remove the snow
for efficient operation.
1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the
product. (If width of the frame is wider than that of the product, snow may accumulate)
2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.
Periodic ( more than once/a year ) clean the impurities settled on the heat exchanger by using water.
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are
produced.
2. Do not install the product where it could be exposed to sea breezes directly. It can result in corrosion on
the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction
or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea breezes.
Otherwise it needs additional anticorrosion treatment on the heat exchanger.
Sea wind Sea wind
Sea wind
Windbreak
Installation at Seaside
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea breezes should be
avoided. Install the outdoor unit on the opposite side of the direction of the sea breeze.
2) In case, to install the outdoor unit on the seaside, put up a windbreak not to be exposed to the sea wind.
3) Select a well-drained place.
• It should be strong enough like concrete to prevent
the sea wind from the sea.
• The height and width should be more than 150 % of
the outdoor unit.
• It should be kept more than 700 mm of space
between outdoor unit and the windbreak for easy.
air flow.

18 Air-to-Water Heat Pump
Installation of Indoor Unit
The device is installed according to capacity
General
1Heating/Cooling Inlet 3DHW – outlet
2Heating/Cooling Outlet 4DHW – circulation
CElectrical and communication connection 5DHW – inlet
EConnection to outdoor unit 6Gas pipe 5/8‘‘– refrigerant
DConnection to outdoor unit 7Liquid pipe 3/8‘‘– refrigerant
P6 Power supply cable P7 Communication cable - connection between
outdoor and indoor unit
Installation of Indoor Unit

Installation of Indoor Unit
Installation Manual 19
ENGLISH
• It is obligatory to consider the minimal clearance from obstacles for ensuring unobstructed access
for maintenance and service.
• The location of the device has to be accessible by manual transport devices to ensure
undisturbed delivery of replacement parts and equipment for maintenance and servicing.
The operator is charged costs connected with hiring special equipment for installing the device,
servicing and maintenance separately, these costs are not subjected to warranty.
• When you install a device into the building, ensure that you build in a water drain in case of
spillage.
Minimal clearance from the device
The device must not be installed under pipelines because there is a possibility of condensate
forming. Ingress of water condensate can cause disturbances in the operation.
The installation location of the indoor unit must be dry and in the temperature range between +10
C and 40 °C.
Location of the device

20 Air-to-Water Heat Pump
Installation of Indoor Unit
Minimal clearances of the external device from walls facilitates seamless operation, maintenance
and servicing.
The unit should be installed upwards in a straight manner.
(unit:mm)