LG THERMA V Series 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 © 2019 LG Electronics Inc. All Rights Reserved.
MFL67212828
Rev.00_051519
ENGLISH FRANÇAIS
ΕΛΛΗΝΙΚΆ

TABLE OF CONTENTS
2
ENGLISH
5 PREFACE
6 IMPORTANT SAFETY INSTRUCTIONS
12 INSTALLATION PART
13 GENERAL INFORMATION
13 Model Information
15 Model name and related information
16 Parts and Dimensions
19 Control Parts
20 Control Panel
23 Typical Installation Example
24 Cycle Diagram
25 INSTALLATION
25 Transporting the Unit
26 Selection of the best location
28 Installation Space
32 Collective / Continuous Installation for roof top use
33 Installation at Seaside
33 Seasonal wind and cautions in winter
35 INSTALLATION OF INDOOR UNIT
35 Electrical Wiring
38 Drill a Hole in the Wall
38 PIPING AND WIRING FOR OUTDOOR UNIT
38 Refrigerant Piping
39 Preparation for Piping
40 Connecting Pipe to Indoor Unit
40 Connecting Pipe to Outdoor Unit
43 Finalizing
44 Leakage test and Evacuation
46 Electrical Wiring
49 PIPING AND WIRING FOR INDOOR UNIT
49 Water Piping and Water Circuit Connection
53 Water pump Capacity
53 Water Quality
54 Frost protection
TABLE OF CONTENTS

3
TABLE OF CONTENTS
ENGLISH
55 ACCESSORIES INSTALLATION
57 Before Installation
57 Thermostat
60 3rd Party Controller
61 Central Controller
62 DHW Tank
63 Dry Contact
65 External Controller - Setting up programmable digital input operation
66 Remote Temperature Sensor
68 External pump
69 Wi-fi Modem
70 Smart Grid
71 3Way Valve(A)
72 CONFIGURATION
72 DIP Switch Setting
78 SERVICE SETTING
78 How to enter service setting
78 Service setting
79 Service contact
80 Model information
81 RMC version lnformation
82 Open source license
83 INSTALLER SETTING
83 How to enter installer setting
84 Installer setting
86 3 Minutes Delay
87 Select Temperature Sensor
88 Dry Contact Mode
89 Central Control Address
90 Pump test run
91 Air heating set temp.
92 Water heating set temp
93 DHW set temp
94 Tank disinfection setting 1, 2
95 Tank setting 1
96 Tank setting 2
98 DHW time setting
99 TH on/off Variable, heating air
100 TH on/off Variable, heating water
101 Heating temp. setting

4
TABLE OF CONTENTS
ENGLISH
102 Pump setting in heating
103 Forced operation
104 CN_CC
105 Smart Grid(SG)
106 IDU Address Verification
107 CN_EXT
108 Use External Pump
109 Pump Prerun/Overrun
110 Data logging
111 Password Initialization
112 Power Supply Blockage (SG Ready)
113 Overview settings
115 COMMISSIONING
115 Check List before Starting Operation
116 Starting Operation
117 Starting Operation flow chart
117 Airborne Noise Emission
117 Limiting concentration(R410A)
118 Troubleshooting

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, 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.

IMPORTANT SAFETY INSTRUCTIONS
6
ENGLISH
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid
dangerous situations and ensure peak performance of your
product.
WARNING
It can result in serious injury or death when the directions are
ignored.
CAUTION
It can result in minor injury or product damage when the
directions are ignored.
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.
!
!
!
Read the precautions in this manual carefully before operating the
unit.
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.

7
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
• Always install a dedicated circuit 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.
• 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.

8
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
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 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.

IMPORTANT SAFETY INSTRUCTIONS
9
ENGLISH
- 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.
• 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.

10
IMPORTANT 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.
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 circuit 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
!