LG THERMA V HN0913T User manual

INSTALLATION MANUAL
AIR-TO-WATER
HEAT PUMP
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
Copyright © 2022 - 2023 LG Electronics Inc. All Rights Reserved.
MFL68681836
Rev.02_101123
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
PORTUGUÊS
MAGYAR
БЪЛГАРСКИ
SRPSKI
HRVATSKI
SLOVENŠČINA
DANSK

2
TABLE OF CONTENTS
ENGLISH
6PREFACE
[Chapter 1]
7SAFETY INSTRUCTIONS
[Chapter 2]
15 INSTALLATION PART
[Chapter 3]
17 GENERAL INFORMATION
17 Model Information
19 Related Information
20 Parts and Dimensions
25 Control Parts
26 Control Panel
27 Typical Installation Example
30 Cycle Diagram
31 Water cycle
[Chapter 4]
32 INSTALLATION OF OUTDOOR UNIT
32 Conditions where Outdoor Unit is Installed
32 Drill a Hole in the Wall
33 Transporting the Unit
35 Installation at Seaside
36 Seasonal wind and cautions in winter
[Chapter 5]
37 INSTALLATION OF INDOOR UNIT
37 Conditions where Indoor Unit is Installed
39 Transporting the Unit
40 Connecting Condensate drainage
40 Front Panel Removal
41 Floor area requirement : Indoor unit
TABLE OF CONTENTS

3
TABLE OF CONTENTS
ENGLISH
42 Ventilation requirements
45 Electrical Wiring
[Chapter 6]
48 PIPING AND WIRING FOR OUTDOOR UNIT
48 Refrigerant Piping
49 Preparation for Piping
50 Connecting Pipe to Indoor Unit
50 Connecting Pipe to Outdoor Unit
53 Finalizing
54 Leakage test and Evacuation
56 Electrical Wiring
[Chapter 7]
60 PIPING AND WIRING FOR INDOOR UNIT
60 Water Piping and Water Circuit Connection
62 Connection to the Domestic hot water system
65 Connection to the Heating system
67 Water Volume and Expansion Vessel Pressure
68 Water Charging
70 Water pump Capacity
70 Pressure Drop
71 Performance curve
72 Water Quality
72 Frost protection by antifreeze
[Chapter 8]
73 ACCESSORIES INSTALLATION
74 Before Installation
75 Thermostat
78 2nd Circuit
81 3rd Party Boiler
82 3rd Party Controller
83 Meter Interface
84 Central Controller
86 Dry Contact
89 External Controller - Setting up programmable digital input operation
90 Remote Temperature Sensor
92 External pump

4
TABLE OF CONTENTS
ENGLISH
93 Wi-fi Modem
94 Energy State
95 Digital Input for energy saving (ESS, Smart Grid)
96 2Way Valve
97 Domestic hot water expansion vessel – integrated into the unit
98 Final check
[Chapter 9]
99 CONFIGURATION
99 DIP Switch Setting
105 SERVICE SETTING
105 How to enter service setting
105 Service setting
106 Service contact
107 Model information
108 RMC version information
109 Open source license
110 INSTALLER SETTING
110 How to enter installer setting
111 Installer setting
115 Select Temperature Sensor
116 Use Heating Tank Heater
117 Mixing Circuit
120 Use External Pump
121 RMC master/slave
122 LG Therma V Configuration
123 Forced operation
124 Pump Prerun/Overrun
125 Water Flow Control
126 Energy Monitoring
127 Anti-Freezing Option 1
128 Password Reset
129 Heating temp. setting
130 Air heating set temp.
131 Water heating set temp.
132 Hysteresis Heating Water
133 Hysteresis Room Air(Heating)
134 Pump setting in heating
135 Heater on temperature
136 Screed drying

5
TABLE OF CONTENTS
ENGLISH
138 Cooling temp. setting
139 Air cooling set temp.
140 Water cooling set temp.
141 Water supply off temp. during cooling
143 Hysteresis Cooling Water
144 Hysteresis Room Air(Cooling)
145 Pump setting in cooling
146 Seasonal auto temp.
148 DHW set temp.
149 Tank disinfection setting 1, 2
150 Tank setting 1
151 Tank setting 2
153 DHW time setting
155 Recirculation time
156 Pump test run
157 Frost Protection Temp.
158 Dry Contact Mode
159 Central Control Address
160 CN_CC
161 Modbus Address
162 Modbus gateway memory map
165 CN_EXT
166 3rd Party Boiler
167 Meter Interface
168 Energy state
169 Thermostat control type
170 Pump operation time
171 IDU operation time
172 Current flow rate
173 Data logging
[Chapter 10]
174 COMMISSIONING
174 Check List before Starting Operation
175 Starting Operation
176 Starting Operation flow chart
176 Airborne Noise Emission
177 Vacuum & Charge of Refrigerant
179 Decommissioning and Recycling
181 Reset of the thermal protection of the electrical heater
182 Troubleshooting
187 Open Source Software Notice Information

6
PREFACE
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 ten chapters. These chapters are classified according to
installation procedure. See the table below to get summarized information.
REMARK : ALL CONTENTS OF THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE.
TO GET THE LATEST INFORMATION, PLEASE VISIT LG ELECTRONICS WEB SITE.
* The feature may be vary according to the type of model.
Chapters Contents
Chapter 1
• Warning and Caution concerned with safety.
• This chapter is directly related with human safety. We strongly recommend reading this
chapter carefully.
Chapter 2
• Items Inside product Box
• Before starting installation, please make it sure that all parts are found inside the product
box.
Chapter 3
• 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
Chapter 4
• Installation about the outdoor unit.
• Installation location, constraints on installation site, etc
Chapter 5
• Installation about the indoor unit.
• Installation location, constraints on installation site, etc
• Constrains when accessories are installed
Chapter 6
• 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.
Chapter 7
• 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.
Chapter 8
• Information about supported accessories
• Specification, Constraints, and wiring are described.
• Before purchasing accessories, please find supported specification to buy proper one.
Chapter 9 • Test operation and check point while test running.
Chapter 10
• Check points before starting operation are explained.
• Troubleshooting, maintenance, and error code list are presented to correct problems.

7
SAFETY INSTRUCTIONS
ENGLISH
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.
!
Read the precautions in this
manual carefully before
operating the unit.
This appliance is filled with
flammable refrigerant (R32)
This symbol indicates that
the Operation Manual should
be read carefully.
This symbol indicates that a
service personnel should be
handling this equipment with
reference to the Installation
Manual.
SAFETY INSTRUCTIONS
WARNING
This indicates that the failure to follow the instructions can
cause serious injury or death.
CAUTION
This indicates that the failure to follow the instructions can
cause the minor injury or damage to the product.
This symbol is displayed to indicate matters and
operations that can cause risk. Read the part with this
symbol carefully and follow the instructions in order to
avoid risk.
!
!
!
The following safety guidelines are intended to prevent
unforeseen risks or damage from unsafe or incorrect operation
of the appliance. The guidelines are separated into ‘WARNING’
and ‘CAUTION’ as described below.

8
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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 cause product damage.

9
SAFETY INSTRUCTIONS
ENGLISH
• Do not touch leaked refrigerant directly.
- There is risk of frostbite.
• Copper in contact with refrigerants shall be oxygen-free or
deoxidized, for example Cu-DHP as specified in EN 12735-1
and EN 12735-2.
• Compliance with national gas regulations shall be observed.
(for R32)
• Refrigerant tubing shall be protected or enclosed to avoid
damage. (for R32)
• The installation of pipe-work shall be kept to a minimum. (for
R32)
• A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to flow
between the refrigerating system parts. A vacuum valve shall
be provided to evacuate the interconnecting pipe and/or any
uncharged refrigerating system part. (for R32)
• Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry-accredited assessment authority, which authorises
their competence to handle refrigerants safely in accordance
with an industry recognised assessment specification. (for
R32)
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
(for R32)
• Do not pierce or burn. (for R32)
• Be aware that refrigerants may not contain an odour. (for R32)
• Dismantling the unit, treatment of the refrigerant oil and
eventual parts should be done in accordance with local and
national standards. (for R32)
• Flexible refrigerant connectors (such as connecting lines
between the indoor and outdoor unit) that may be displaced
during normal operations shall be protected against mechanical
damage. (for R32)

10
SAFETY INSTRUCTIONS
ENGLISH
• Pipe-work shall be protected from physical damage. (for R32)
• Mechanical connections (mechanical connectors or flared
joints) shall be accessible for maintenance purposes. (for R32)
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 smell or smoke comes from unit, turn the
breaker off or disconnect the power supply cable.
- There is risk of electric shock or fire.

11
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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.

12
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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.
• The appliance shall be stored in a well-ventilated area where
the room size corresponds to the room area as specified for
operation. (for R32)
• The appliance shall be stored in a room without continuously
operating open flames (for example an operating gas
appliance) and ignition sources (for example an operating
electric heater). (for R32)
• The appliance shall be stored so as to prevent mechanical
damage from occurring. (for R32)
• Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring the
assistance of other skilled personnel shall be carried out under
the supervision of the person competent in the use of
flammable refrigerants. (for R32)
• When mechanical connectors are reused indoors, sealing parts
shall be renewed. When flared joints are reused indoors, the
flare part shall be re-fabricated. (for R32)
• Periodic(more than once/year) cleaning of the dust or salt
particles stuck on the heat exchangers by using water. (for
R32)
• Keep any required ventilation openings clear of obstruction.
(for R32)

13
SAFETY INSTRUCTIONS
ENGLISH
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.
• 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.
• Do not install the unit in potentially explosive atmospheres.
• The water may drip from the discharge pipe of the pressure-
relief device and that this pipe must be left open to the
atmosphere.
• The pressure-relief device is to be operated regularly to
remove lime deposits and to verify that it is not blocked.
• A discharge pipe connected to the pressure-relief device is to
be installed in a continuously downward direction and in a
frost-free environment.
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.
!

14
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• The appliance shall be disconnected from its power source
during service and when replacing parts.
• Means for disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules.
• The Installation kit supplied with the appliance are to be used
and that old Installation kit should not be reused.
• If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in
order to avoid a hazard. Installation work must be performed in
accordance with the national wiring standards by authorized
personnel only.
• This equipment shall be provided with a supply conductor
complying with the national regulation.
• The instructions for service to be done by specialized
personnel, mandated by the manufacturer or the authorized
representative may be supplied in only one Community
language which the specialized personnel understand.
• This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the
appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the
appliance.

15
INSTALLATION PART
ENGLISH
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
* There are 3 gaskets between pipes and caps, which is in Heating circuit outlet pipe, Domestic
cold water inlet pipe and DHW Re-Circulation pipe. 2 gaskets are enclosed inside the product
box.
INSTALLATION PART
OUTDOOR UNIT BOX
Item Image Quantity
Outdoor Unit
U36A Chassis 1
Drain Cap 4
Drain Nipple 1
Damper 4
Item Image Quantity
Connection Hose 1
Gasket (G1”) 2
Adapter Cable 1
Item Image Quantity
Indoor unit 1
Card,
Installation 1
Owner's /
Installation manual 1

16
INSTALLATION PART
ENGLISH
INSTALLATION TOOLS
Figure Name Figure Name
Screw driver Ohmmeter
Electric drill Hexagonal wrench
Measuring tape, Knife Ammeter
Hole core drill Leak detector
Spanner Thermometer,
Horizontal meter
Torque wrench Flaring tool set
Manifold Gauge Vacuum Pump
Pliers - -

17
GENERAL INFORMATION
ENGLISH
Model Information
Factory Model Name
Outdoor unit Indoor unit
Model No.
1234567
Split ZH U W 09 6 A 0
Signification
1 ZH : Air-to-Water-Heat Pump for R32
2Classification
- U : Outdoor unit of Split
3Model Type
- W : Inverter Heat Pump
4Heating Capacity
- e.g. 09 : 9 kW
5Electrical ratings
- 6 : 1Ø, 220-240V, 50 Hz
6Function
- A : General function of Split
7 Series number (Factory)
Model No.
12345678
Split ZH N W 20 6 03 I 1
Signification
1 ZH : Air-to-Water-Heat Pump for R32
2Classification
- N : Indoor unit
3Model Type
- W : Inverter Heat Pump
4Water Tank Capacity
- 20 : 200L
5Electrical ratings
- 6 : 1Ø, 220-240V, 50 Hz
6Heater Capacity
- 3: 3 kW Heater
7Function
- I : Split IWT
8 Series number (Factory)
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 and find helpful information
on installation.
Energy Labels and Product Fiches for all possible combinations can be found at
https://www.lg.com/global/support/cedoc/cedoc. Search for outdoor unit name in cedoc page.

18
GENERAL INFORMATION
ENGLISH
Buyer Model Name
Outdoor unit Indoor unit
Signification
1 Air-to-Water Heat Pump
2Classification
- U : Outdoor unit
3Heating Capacity
- e.g. 9 : 9 kW
4Electrical ratings
- 1 : 1Ø, 220-240V, 50 Hz
5Leaving water combination
- M : Medium Temperature
6Refrigerant
- R : R32
8Chassis
- U4 : U36A Chassis
9 Series number (Buyer)
Signification
1 Air-to-Water Heat Pump
2Classification
- N : Indoor unit
3Heating Capacity
- e.g. 09 : 9 kW
4Electrical ratings
- 1 : 1Ø, 220-240V, 50 Hz
5Heater capacity (kW)
- 3: 3kW Heater
6Function
- T: Split IWT
8Classification
- N : Indoor unit
9Chassis (Platform)
- K : K5 Chassis
10 Series number (Buyer)
Type Refrigerant No.
1 2 3 4 5 6 8 9
Split R32 H U 09 1 M R U4 4
Type Refrigerant No.
1 2 3 4 5 6 8 9 10
Split R32 H N 09 1 3 T N K 0
Check the model information based on the buyer model series number.
(e.g., geometry, cycle, etc.)

19
GENERAL INFORMATION
ENGLISH
Related Information
*1 : Tested under EN14511
(water temperature 30 °C ’35 °C at outdoor ambient temperature 7 °C / 6 °C)
*2 : Tested under EN14511
(water temperature 23 °C ’18 °C at outdoor ambient temperature 35 °C / 24 °C)
hAll appliances were tested at atmospheric pressure.
Unit
Heat Pump Backup Heater
Type Refrigerant
Outdoor Unit Indoor Unit
Power Supply
Capacity
Capacity
[kW] Power Supply
Phase
Capacity
[kW]
Phase
Heating
[kW]*1
Cooling
[kW]*2
Split R32 1Ø
5
1Ø
220-240 V~
50 Hz
5.5 5.5
3
220-240 V~
50 Hz
7 7.0 7.0
9 9.0 9.0
* DHW: Domestic hot water
* IWT : Integrated water tank indoor unit
- Energy Labels and Product Fiches for all possible combinations can be found at
https://www.lg.com/global/support/cedoc/cedoc. Search for outdoor unit name in cedoc page.
- Additional Information : Serial number is refer to the barcode on the product.
Refrigerant R32
Max allowable
pressure
High side [MPa] 4.32
Low side [MPa] 2.4
Operating
temperature of
leaving water
(Min. ~ Max.)
Heating [°C] For Fan coil unit / Radiator 15 ~ 65
For under floor 15 ~ 65
Cooling [°C] For Fan coil unit 5 ~ 27
For under floor 16 ~ 27
DHW 15 ~ 80
Inlet water pressure [MPa] (Min. ~ Max.) 0.03 ~ 0.3
Maximum DHW tank pressure [MPa] 1.0

20
GENERAL INFORMATION
ENGLISH
Parts and Dimensions
Indoor unit : External
* The feature may be vary according to the type of model.
(unit : mm)