LG THERMA V HN0916T 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 © 2020 LG Electronics Inc. All Rights Reserved.
MFL68681818
Rev.00_070220
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
PORTUGUÊS
MAGYAR
БЪЛГАРСКИ
SRPSKI
HRVATSKI
SLOVENŠČINA

TABLE OF CONTENTS
2
ENGLISH
5PREFACE
[Chapter 1]
6SAFETY INSTRUCTIONS
[Chapter 2]
14 INSTALLATION PART
[Chapter 3]
15 GENERAL INFORMATION
15 Model Information
17 Model name and related information
18 Parts and Dimensions
21 Control Parts
22 Control Panel
23 Typical Installation Example
26 Cycle Diagram : Internal
27 Cycle Diagram : External
28 System planning and preparation
[Chapter 4]
29 INSTALLATION OF OUTDOOR UNIT
29 Conditions where Outdoor Unit is Installed
29 Drill a Hole in the Wall
30 Transporting the Unit
32 Installation at Seaside
32 Seasonal wind and cautions in winter
[Chapter 5]
33 INSTALLATION OF INDOOR UNIT
33 Conditions where Indoor Unit is Installed
34 Transporting the Unit
35 Connecting Condensate drainage
35 Front Panel Removal
36 Floor area requirement : indoor unit
37 Ventilation requirements
40 Electrical Wiring
[Chapter 6]
43 PIPING AND WIRING FOR OUTDOOR UNIT
43 Refrigerant Piping
44 Preparation for Piping
45 Connecting Pipe to Indoor Unit
45 Connecting Pipe to Outdoor Unit
48 Finalizing
49 Leakage test and Evacuation
51 Electrical Wiring
TABLE OF CONTENTS

3
TABLE OF CONTENTS
ENGLISH
[Chapter 7]
55 HYDRAULIC CONNECTION FOR INDOOR UNIT
55 General Considerations
57 Connection to the Domestic hot water system
60 Connection to the Heating system
62 Water Charging
63 Water pump Capacity
63 Pressure Drop
64 Performance curve
66 Water Quality
66 Frost protection
[Chapter 8]
67 ACCESSORIES INSTALLATION
68 Before Installation
68 Domestic hot water expansion vessel – integrated into the unit
69 Buffer tank – integrated into the unit
72 Thermostat
77 3rd Party Boiler
78 3rd Party Controller
79 Meter Interface
80 2 Zone Controller
81 Central Controller
83 Dry Contact
85 External Controller - Setting up programmable digital input operation
86 Remote Temperature Sensor
88 External pump
89 Wi-fi Modem
90 Smart Grid
91 2Way Valve
92 Final check
[Chapter 9]
93 CONFIGURATION
93 DIP Switch Setting
99 SERVICE SETTING
99 How to enter service setting
99 Service setting
100 Service contact
101 Model information
102 RMC version information
103 Open source license
104 INSTALLER SETTING
104 How to enter installer setting
105 Installer setting
108 Overview settings
111 Select Temperature Sensor
112 Use Heating Tank Heater
113 Mixing circuit
114 Use External Pump

4
TABLE OF CONTENTS
ENGLISH
115 RMC master/slave
116 LG Therma V Configuration
117 Forced operation
118 Pump Capacity
119 Pump Prerun/Overrun
120 Password Reset
121 Heating temp. setting
122 Air heating set temp.
123 Water heating set temp
124 TH on/off Variable, heating air
125 TH on/off Variable, heating water
126 Pump setting in heating
127 Heater on temperature
128 Screed drying
130 Cooling temp. setting
131 Air cooling set temp
132 Water cooling set temp
133 Water supply off temp. during cooling
135 TH on/off Variable, cooling air
136 TH on/off Variable, cooling water
137 Pump setting in cooling
138 Seasonal auto temp
140 DHW set temp
141 Tank disinfection setting 1, 2
142 Tank setting 1
143 Tank setting 2
145 DHW time setting
146 Pump test run
147 Frost Protection Temp.
148 Dry Contact Mode
149 Central Control Address
150 CN_CC
151 Smart Grid (SG)
152 Power Supply Blockage (Smart Grid)
153 Modbus Address
154 CN_EXT
155 3rd Party Boiler
156 Meter Interface
157 Zone
159 Pump operation time
160 IDU operation time
161 Current flow rate
162 Data logging
[Chapter 10]
163 COMMISSIONING
163 Check List before Starting Operation
164 Starting Operation
165 Starting Operation flow chart
165 Airborne Noise Emission
166 Vacuum & Charge of Refrigerant
169 Decommissioning and Recycling
171 Troubleshooting
176 Reset of the thermal protection of the electric heater

5
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.
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, cycle diagram, parts and dimensions, 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
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
• Information about installation setting.
• Dip switch, service, installer setting etc.
Chapter 10
• Check points before starting operation are explained.
• Troubleshooting, maintenance, and error code list are presented to correct problems.

SAFETY INSTRUCTIONS
6
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.

7
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.
• Do not touch leaked refrigerant directly.
- There is risk of frostbite.

8
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• Refrigerant tubing shall be protected or enclosed to avoid
damage.
• The installation of pipe-work shall be kept to a minimum.
• 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.
•
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.
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Dismantling the unit, treatment of the refrigerant oil and
eventual parts should be done in accordance with local and
national standards.
• 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.
• Pipe-work shall be protected from physical damage.
• Mechanical connections (mechanical connectors or flared
joints) shall be accessible for maintenance purposes.
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.

SAFETY INSTRUCTIONS
9
ENGLISH
• 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.
• 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.

10
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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.
• 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).