LG THERMA V HM093MR User manual

INSTALLATION MANUAL
AIR-TO-WATER
HEAT PUMP
www.lg.com
Copyright © 2018 - 2023 LG Electronics Inc. All Rights Reserved.
MFL68026607
Rev.17_013023
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.
PORTUGUÊS
MAGYAR
БЪЛГАРСКИ
SRPSKI
HRVATSKI
SLOVENŠČINA
DANSK
ENGLISH ITALIANO ESPAÑOL
FRANÇAIS
DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

TABLE OF CONTENTS
2
ENGLISH
8PREFACE
[Chapter 1]
9SAFETY INSTRUCTIONS
[Chapter 2]
22 INSTALLATION PART
[Chapter 3]
23 GENERAL INFORMATION
23 Model Information
25 Model name and related information
26 Parts and Dimensions
32 Control Parts
34 Remote Controller
35 Typical Installation Example
41 Cycle Diagram
44 Water cycle
[Chapter 4]
47 INSTALLATION
47 Transporting the Unit
48 Installation places
49 Multiple installation
51 Installation at Seaside
51 Seasonal Wind and Cautions in Winter
52 Foundation for Installation
53 Electrical Wiring
TABLE OF CONTENTS

3
TABLE OF CONTENTS
ENGLISH
63 Wiring of main power supply and equipment capacity
64 Water Piping and Water Circuit Connection
65 Pipe Insulation
66 Water Charging
67 Water pump Capacity
67 Pressure Drop
68 Performance curve
69 Water Quality
69 Frost protection by antifreeze
70 Frost protection by antifreeze valve
72 Water Volume and Expansion Vessel Pressure
[Chapter 5]
73 ACCESSORIES INSTALLATION
73 Accessories supported by LG Electronics
75 Accessories supported by 3rd party Companies
76 Before Installation
76 Thermostat
80 2nd Circuit
85 3rd Party Boiler
86 3rd Party Controller
87 Meter Interface
88 Central Controller
89 Remote Controller
93 DHW Tank
98 DHW Tank Kit
100 Solar Thermal Kit (For 3 Series)
102 Solar Thermal Kit (For 4 Series)
103 Dry Contact
105 External Controller - Setting up programmable digital input operation
106 Remote Temperature Sensor
109 Solar pump
110 External pump
111 Wi-fi Modem

4
TABLE OF CONTENTS
ENGLISH
112 Energy State
113 Digital Input for energy saving (ESS, Smart Grid)
114 2Way Valve
116 3Way Valve(A)
117 3Way Valve(B)
118 Electric Heater
124 Typical Installation Example
126 Final check
[Chapter 6]
127 CONFIGURATION
127 DIP Switch Setting
[Chapter 7]
137 SERVICE SETTING
137 How to enter service setting
137 Service setting
138 Service Contact
139 Model Information
140 RMC Version lnformation
141 Open Source License
[Chapter 8]
142 INSTALLER SETTING (For 3 Series)
142 How to enter installer setting
143 Installer setting (For 3 Series)
145 3 Minutes Delay
146 Select Temperature Sensor
147 Dry Contact Mode
148 Central Control Address
149 Pump test run
150 Air cooling set temp

5
TABLE OF CONTENTS
ENGLISH
151 Water cooling set temp
152 Air heating set temp
153 Water heating set temp
154 DHW set temp
155 Screed drying
157 Heater on temperature
159 Water supply off temp. during cooling
161 Tank disinfection setting 1, 2
162 Tank setting1
163 Tank setting2
165 Heater priority
166 DHW time setting
168 TH on/off Variable, heating air
169 TH on/off Variable, heating water
170 TH on/off Variable, cooling air
171 TH on/off Variable, cooling water
172 Heating temp. setting
173 Cooling temp. setting
174 Pump setting in heating
175 Pump setting. in cooling
176 Forced operation
177 CN_CC
178 Pump Capacity
179 Seasonal auto temp
181 Modbus Address
182 CN_EXT
183 Anti-freezing Temperature
184 Add Zone
185 Use External Pump
186 3rd Party Boiler
187 Meter Interface
188 Pump Prerun/Overrun
189 Solar Thermal System
191 Energy state
194 Data logging
195 Password Initialization

6
TABLE OF CONTENTS
ENGLISH
196 INSTALLER SETTING (For 4 Series)
199 Select Temperature Sensor
200 Use Heating Tank Heater
201 Mixing Circuit
203 Use External Pump
204 RMC master/slave
205 LG Therma V Configuration
206 Forced operation
207 Pump Prerun/Overrun
208 Water Flow Control
209 Energy Monitoring
210 Anti-Freezing Option 1
211 Password Reset
212 Screed drying
214 Heater on temperature
215 Air heating set temp.
216 Water heating set temp.
217 Hysteresis Room Air(Heating)
218 Hysteresis Heating Water
219 Heating temp. setting
220 Pump setting in heating
221 Air cooling set temp.
222 Water cooling set temp.
223 Water supply off temp. during cooling
225 Hysteresis Room Air(Cooling)
226 Hysteresis Cooling Water
227 Cooling temp. setting
228 Pump setting in cooling
229 Seasonal auto temp.
232 Heater priority
233 DHW set temp.
234 Tank disinfection setting 1, 2
235 Tank setting1
236 Tank setting2
238 DHW time setting

7
TABLE OF CONTENTS
ENGLISH
240 Recirculation time
241 Solar Thermal System
243 Pump test run
244 Frost Protection Temp.
245 Dry Contact Mode
246 Central Control Address
247 CN_CC
248 LG Therma V Configuration
249 Energy state
252 Thermostat control type
253 Pump operation time
254 IDU operation time
255 Modbus Address
256 Modbus gateway memory map
259 CN_EXT
260 3rd Party Boiler
261 Meter Interface
262 Current flow rate
263 Data logging
[Chapter 9]
264 COMMISSIONING
264 Check List before Starting Operation
265 Starting Operation
266 Starting Operation flow chart
266 Airborne Noise Emission
267 Vacuum & Charge of Refrigerant
269 How to drain remaining water in the product
270 Troubleshooting

8
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 nine chapters. These chapters are classified according
to installation procedure. See the table below to get summarized information.
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 unit.
• Installation location, constraints on installation site, etc
• Electrical wiring at the unit.
• System set-up and configuration.
• Information about water pump
Chapter 5
• Information about supported accessories
• Specification, Constraints, and wiring are described.
• Before purchasing accessories, please find supported specification to buy proper
one.
Chapter 6 • Information about DIP switch setting
Chapter 7
• check and input service contact
• information about model and open source license
Chapter 8
• Information on the installer setup mode that sets the detailed functions of the
remote control
• Incorrectly setting the installer setup mode may result in product failure, personal
injury, or property loss, so this chapter requires a deeper understanding
Chapter 9
• Check points before starting operation are explained.
• Troubleshooting, maintenance, and error code list are presented to correct
problems

9
PREFACE
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.
!
Read the precautions in
this manual carefully
before operating the
unit.
This appliance is filled
with flammable
refrigerant (for 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.
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.
SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS
10
ENGLISH
• 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.
• 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.

11
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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)

12
SAFETY INSTRUCTIONS
ENGLISH
• 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)
• 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)
• Ventilated area
Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting any
hot work. A degree of ventilation shall continue during the
period that the work is carried out. The ventilation should
safely disperse any released refrigerant and preferably expel it
externally into the atmosphere.
• Cabling
Cabling will not be subject to wear, corrosion, excessive
pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account
the effects of aging or continual vibration from sources such as
compressors or fans.
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
13
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.

14
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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.

15
SAFETY INSTRUCTIONS
ENGLISH
• 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)
Repair
• Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be
used in the searching for or detection of refrigerant leaks.
A halide torch (or any other detector using a naked flame) shall
not be used.

16
SAFETY INSTRUCTIONS
ENGLISH
• Leak detection methods
The following leak detection methods are deemed acceptable
for systems containing flammable refrigerants. Electronic leak
detectors shall be used to detect flammable refrigerants, but
the sensitivity may not be adequate, or may need re-
calibration. (Detection equipment shall be calibrated in a
refrigerant-free area.) Ensure that the detector is not a
potential source of ignition and is suitable for the refrigerant
used. Leak detection equipment shall be set at a percentage of
the LFL of the refrigerant and shall be calibrated to the
refrigerant employed and the appropriate percentage of gas
(25 % maximum) is confirmed.
Leak detection fluids are also suitable for use with most
refrigerants but the use of detergents containing chlorine shall
be avoided as the chlorine may react with the refrigerant and
corrode the copper pipe-work.
NOTE
Examples of leak detection fluids are
- Bubble method
- Fluorescent method agents
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of
the refrigerant shall be recovered from the system, or isolated
(by means of shut off valves) in a part of the system remote
from the leak. Removal of refrigerant shall be according to
removal and evacuation procedure.
• Charging procedures
In addition to conventional charging procedures, the following
requirements shall be followed.
- Ensure that contamination of different refrigerants does not
occur when using charging equipment. Hoses or lines shall
be as short as possible to minimise the amount of refrigerant
contained in them.

17
SAFETY INSTRUCTIONS
ENGLISH
- Cylinders shall be kept in an appropriate position according to
the instruction.
- Ensure that the refrigeration system is earthed prior to
charging the system with refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigerating
system. Prior to recharging the system, it shall be pressure
tested with the appropriate purging gas.
The system shall be leak-tested on completion of charging
but prior to commissioning. A follow up leak test shall be
carried out prior to leaving the site.
• Recovery
When removing refrigerant from a system, either for servicing
or decommissioning, it is recommended good practice that all
refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only
appropriate refrigerant recovery cylinders are employed.
Ensure that the correct number of cylinders for holding the
total system charge are available.
All cylinders to be used are designated for the recovered
refrigerant and labelled for that refrigerant (i.e. special cylinders
for the recovery of refrigerant).
Cylinders shall be complete with pressure relief valve and
associated shut-off valves in good working order.
Empty recovery cylinders are evacuated and, if possible,
cooled before recovery occurs.
The recovery equipment shall be in good working order with a
set of instructions concerning the equipment that is at hand
and shall be suitable for the recovery of flammable
refrigerants. In addition, a set of calibrated weighing scales
shall be available and in good working order.

18
SAFETY INSTRUCTIONS
ENGLISH
Hoses shall be complete with leak-free disconnect couplings
and in good condition. Before using the recovery machine,
check that it is in satisfactory working order, has been properly
maintained and that any associated electrical components are
sealed to prevent ignition in the event of a refrigerant release.
Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant
supplier in the correct recovery cylinder, and the relevant
Waste Transfer Note arranged.
Do not mix refrigerants in recovery units and especially not in
cylinders. If compressors or compressor oils are to be
removed, ensure that they have been evacuated to an
acceptable level to make certain that flammable refrigerant
does not remain within the lubricant.
The evacuation process shall be carried out prior to returning
the compressor to the suppliers.
Only electric heating to the compressor body shall be
employed to accelerate this process. When oil is drained from
a system, it shall be carried out safely.
• Removal and evacuation
When breaking into the refrigerant circuit to make repairs – or
for any other purpose – conventional procedures shall be used.
However, for flammable refrigerants it is important that best
practice is followed since flammability is a consideration.
The following procedure shall be adhered to:
- Remove refrigerant;
- Purge the circuit with inert gas (optional for A2L);
- Evacuate (optional for A2L);
- Purge with inert gas (optional for A2L);
- Open the circuit by cutting or brazing

19
SAFETY INSTRUCTIONS
ENGLISH
The refrigerant charge shall be recovered into the correct
recovery cylinders. For appliances containing flammable
refrigerants other than A2L refrigerants, the system shall be
purged with oxygen-free nitrogen to render the appliance safe
for flammable refrigerants. This process may need to be
repeated several times.
Compressed air or oxygen shall not be used for purging
refrigerant systems.
For appliances containing flammable refrigerants, other than
A2L refrigerants, refrigerants purging shall be achieved by
breaking the vacuum in the system with oxygen-free nitrogen
and continuing to fill until the working pressure is achieved,
then venting to atmosphere, and finally pulling down to a
vacuum. This process shall be repeated until no refrigerant is
within the system. When the final oxygen-free nitrogen charge
is used, the system shall be vented down to atmospheric
pressure to enable work to take place. This operation is
absolutely vital if brazing operations on the pipe-work are to
take place. Ensure that the outlet for the vacuum pump is not
close to any potential ignition sources and that ventilation is
available.
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.
!

20
SAFETY INSTRUCTIONS
ENGLISH
• 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.
• 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.