LG THERMA V User manual

ENGLISH
LG
Air-to-Water Heat Pump
LG
IMPORTANT
• Please read this owner's manual carefully and
thoroughly before installing and operating your
Air-to-Water Heat Pump.
• Please retain this owner's manual for future
reference after reading it thoroughly.
Owner's Manual
Dear Owner
Thank you for installing LG Air-to-Water Heat Pump.
Your best choice guarantees you a great
performance and service to make your life
comfortable & pleasant.

2Air-to-Water Heat Pump Owner’s Manual
Air-to-Water Heat Pump Owner’s Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each
unit.
Installer's Name
Purchased Date
■
Staple your receipt to this page in the event you
need it to prove date of purchase or for warranty
issues.
READ THIS MANUAL
Inside you will find many helpful hints on how to use and
maintain your AWHP properly. Just a little preventive
care on your part can save you a great deal of time and
money over the life of your product.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
PRECAUTION
•Contact the authorized service technician for repair or
maintenance of this unit.
• Contact the installer for installation of this unit.
• AWHP is not intended for use by young children or
invalids without supervision.
• Young children should be supervised to ensure that
they do not play with AWHP.
• When the power cable is to be replaced, replacement
work shall be performed by authorized personnel only
using only genuine replacement parts.
• Installation work must be performed in accordance
A. Safety Precautions.........................3
B. Product Introduction......................6
C. Installation instruction...................8
D. Owner's instruction......................36
E. Using Thermostat.........................63
F. Maintenance and Service.............67
G. Disposal Requirements ...............69

Safety Precaution
Owner’s Manual 3
ENGLISH
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by
the following indications.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
WARNING
Always ground the product.
• There is a risk of electric shock.
Do not use a defective or underrated
circuit breaker. Use the correctly rated
breaker and fuse.
• There is risk of fire or electric shock .
Do not use a multi outlet. Always use
this appliance on a dedicated circuit and
breaker.
• Otherwise it can cause electric shock or fire.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized
Service Center. Do not disassemble or repair
the product by yourself.
• There is risk of fire or electric shock.
Always ground the product as per the
wiring diagram. Do not connect the
ground wire to gas or water pipes
lightening rod or telephone ground wire.
• 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 due to
dust , water etc.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not modify or extend the power
cable. If the power cable or cord has
scratches or skin peeled off or
deteriorated then it must be replaced.
• There is risk of fire or electric shock.
For installation, removal or reinstall ,
always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock, explosion,
or injury.
Do not install the product on a defective
installation stand. Be sure that the
installation area does not deteriorate with
age.
• It may cause product to fall.
Never install the outdoor unit on a
moving base or a place from where it
can fall down.
• The falling outdoor unit can cause damage
or injury or even death of a person.
When the product is soaked (flooded or
submerged) in water , contact an
Authorized Service Center for repair
before using it again.
• There is risk of fire or electric shock.
Be sure to check the refrigerant to
be used. Please read the label on the
product.
• Incorrect refrigerant can prevent the normal
operation of the unit.
Don't use a power cord, a plug or a
loose socket which is damaged.
• Otherwise it may cause a fire or electrical
shock.
Do not touch , operate, or repair
the product with wet hands.
• There is risk of electric shock or fire.
Do not place a heater or other heating
appliances near the power cable.
• There is risk of fire and electric shock.
Do not allow water to run into electric
parts. Install the unit away from water
sources.
• There is risk of fire, failure of the product, or
electric shock.
Do not store or use or even allow
flammable gas or combustibles near the
product.
• There is risk of fire.

Safety Precaution
4Air-to-Water Heat Pump Owner’s Manual
Indoor/outdoor wiring connections must
be secured tightly and the cable should
be routed properly so that there is no
force pulling the cable from the
connection terminals.
• Improper or loose connections can cause
heat generation or fire.
Safely dispose off the packing materials.
Like screws, nails, batteries, broken
things etc after installation or service
and then tear away and throw away the
plastic packaging bags.
• Children may play with them and cause
injury.
Make sure to check that the power
device is not dirty, loose or broken and
then Turn on the power.
• Dirty, loose or broken power device can
cause electric shock or fire.
Do not use the product in a tightly
closed space for a long time. Perform
ventilation regularly.
• Oxygen deficiency could occur and hence
harm your health.
Do not open the front cover or grille of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric
shock, or product failure.
If strange sounds, smell or smoke comes
from product, immediately turn the breaker
off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Ventilate the product room from time to
time when operating it together with a
stove, or heating element etc.
• Oxygen deficiency can occur and hence
harm your health.
Turn the main power off when cleaning
or repairing the product.
• There is risk of electric shock.
Take care to ensure that nobody
especially kids could step on or fall onto
the outdoor unit.
• This could result in personal injury and
product damage.
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.
When flammable gas leaks, turn off the
gas and open a window for ventilation
before turn the product on.
• Do not use the telephone or turn switches on
or off. There is risk of explosion or fire.
In outdoor unit the step-up capacitor
supplies high voltage electricity to the
electrical components. Be sure to
discharge the capacitor completely
before conducting the repair work.
• An charged capacitor can cause electrical
shock.
When installing the unit, use the
installation kit provided with the product.
• Otherwise the unit may fall and cause severe
injury.
Be sure to use only those parts which
are listed in the service parts list. Never
attempt to modify the equipment.
• The use of inappropriate parts can cause an
electrical shock, excessive heat generation
or fire.

Safety Precaution
Owner’s Manual 5
ENGLISH
CAUTION
Two or more people must lift and
transport the product.
• Avoid personal injury.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product.
Keep level even when installing the
product.
• To avoid vibration or noise.
Do not install the product where the noise
or hot air from the outdoor unit could
damage or disturb the neighborhoods.
• It may cause a problem for your neighbors
and hence dispute.
Always check for gas (refrigerant)
leakage after installation or repair of
product.
• Low refrigerant levels may cause failure of
product.
Do not use the product for special
purposes, such as preserving foods,
works of art, etc. It is a consumer AWHP,
not a precision refrigeration system.
• There is risk of damage or loss of property.
Do not block the inlet or outlet of air
flow.
• It may cause product failure.
Use a soft cloth to clean. Do not use
harsh detergents, solvents or splashing
water etc .
• There is risk of fire, electric shock, or
damage to the plastic parts of the product.
Do not step on or put anyting on the
product. (outdoor units)
• There is risk of personal injury and failure of product.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operating.
• There are sharp and moving parts that could
cause personal injury.
Be cautious when unpacking and
installing the product.
• Sharp edges could cause injury.
If the refrigerant gas leaks during the
repair, do not touch the leakaing
refrigerant gas.
• The refrigernat gas can cause frostbite (cold
burn)
Do not tilt the unit when removing or
uninstalling it.
• The condensed water inside can spill .
Do not mix air or gas other than the
specified refrigerant used in the system .
• If air enters the refrigerant system, an
excessively high pressure results, causing
equipment damage or injury.
If the refrigerant gas leaks during the
installation, ventilate the area immediately.
• Otherwise it can be harmfull for your health.
Dismantling the unit, treatment of the
refrigerant oil and eventual parts should
be done in accordance with local and
national standards.
Do not expose your skin or kids or
plants to the cool or hot air draft.
• This could harm to your health.
Use a firm stool or ladder when cleaning,
maintaining or repairing the product at
an height.
• Be careful and avoid personal injury.

6Air-to-Water Heat Pump Owner’s Manual
Product Introduction
Product Introduction
1. Indoor unit
2. Outdoor unit
3. Refrigerant pipe and connecting cable
4. Water pipe
5. Ground wire to ground outdoor unit to prevent electrical shocks.
*
The shape of products can be chaged according to the model capacity and type.
1
2
5
4
3
Water
Inlet
Water
Outlet
Typical Installation Scene

Product Introduction
Owner’s Manual 7
ENGLISH
❊Some functions may not be operated and displayed depending on the model.
Control Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
1. Display panel
2. Change temperature button
3. Silent mode On/Off button
4. Operation mode selection button
5. Water heating Enable/Disable
button
6. ESC button
7. Direction button
(Up, Down, Left, Right)
8. Power button
9. Function setting button
10. Temperature setting button
11. Temperature view button
12. Programming button
13. Set/Clear button

8Air-to-Water Heat Pump Owner’s Manual
Installer setting mode is to set the detail function of the control panel.
If the installer setting mode is not set correctly, it could cause problems to the product, user
injury or property damage. This must be set by an certificated installer, and any installation or
change that is carried out by a non-certificated person should be responsible for the results. In
this case, free service cannot be provided.
CAUTION
Installation instruction
Installation instruction
Installer Setting -How to enter installer setting mode
Press Function Setting button for 3
seconds to enter
the installer setting mode.
(When you enter the installer setting
mode initially, Function code is displayed
on the bottom of the LCD screen.)
Repeat pressing button, and the function
code will be changed from 01 to 2A.
Please refer the code table on the next
page.
1
Function Code Value

Owner’s Manual 9
ENGLISH
Installation instruction
Installer Setting -Installation Function Code Table
Function Code
Example of Function Code Display
Value #1 Value #2
■Installation Function Code Table
Code Item Detail Remark
1 Function Test Run
Description Instant cooling operation for charging additional refrigerant
Value #1 Note -
Default -
Range -
Value #2 Note -
Default -
Range -
2 Function Disable 3 Min. Delay
Description Factory use only
Value #1 Note -
Default -
Range -
Value #2 Note -
Default -
Range -
3 Function Remote Air Sensor Connection
Description Connection information about remote air sensor
Value #1 Note 01:Remote air sensor is NOT connected and NOT used
02:Remote air sensor is connected and used
Default 1
Range 01~02
Value #2 Note -
Default -
Range -
4 Function Celsius/Fahrenheit Switching
Description Display temperature in Celsius or Fahrenheit
Value #1 Note 01:Celsius
02:Fahrenheit
Default 1
Range 01~02
Value #2 Note -
Default -
Range -

Installation instruction
10 Air-to-Water Heat Pump Owner’s Manual
Code Item Detail Remark
5 Function Setting Temperature Selection
Description Selection for setting temperature as air temperature or
leaving water temperature
Value #1 Note 01:Air temperature
02:Leaving water temperature
Air temperature as setting temperature is ONLY available
when remote air sensor
Connection is enabled and Function Code 03 is set as 02.
Default 2
Range 01~02
Value #2 Note -
Default -
Range -
6 Function Auto Dry Contact
Description Setting dry contact auto start option
Value #1 Note 01:Auto Start OFF
02:Auto Start ON
Default 2
Range 01~02
Value #2 Note -
Default -
Range -
7 Function Address Setting
Description Assigning address when central controller is installed
Value #1 Note -
Default -
Range -
Value #2 Note -
Default -
Range -
11 Function Setting Air Temperature in Cooling Mode
Description Adjusting range of 'Setting Air Temperature' in cooling mode
Value #1 Note Upper Limit of setting range
Default 30°C
Range 24~30°C
Value #2 Note Lower Limit of setting range
Default 18°C
Range 18~22°C
12 Function Setting Leaving Water Temperature in Cooling Mode
Description Adjusting range of 'Setting Leaving Water Temperature' in
cooling mode
Value #1 Note Upper Limit of setting range
Default 24°C
Range 20~25°C
Value #2 Note Lower Limit of setting range(FCU is equipped)
Default 06°C
Range 06~18°C
'Setting Air
Temperature' is
used when user
wants to set target
temperature by
room air
temperature.
'Setting Leaving
Water
Temperature' is
used when user
wants to set target
temperature by
leaving(from the
indoor unit) water
temperature.

Installation instruction
Owner’s Manual 11
ENGLISH
Code Item Detail Remark
12 Value #2 Note Lower Limit of setting range(FCU is NOT equipped)
Default 16°C
Range 16~18°C
13 Function Setting Air Temperature in Heating Mode
Description Adjusting range of 'Setting Air Temperature' in heating mode
Value #1 Note Upper Limit of setting range
Default 30°C
Range 24~30°C
Value #2 Note Lower Limit of setting range
Default 16°C
Range 16~22°C
14 Function Setting Leaving Water Temperature in Heating Mode
Description Adjustin range of 'Setting Leaving Water Temperature' in
heating mode
Value #1 Note Upper Limit of setting range
Default 55°C
Range 40~55°C
Value #2 Note Lower Limit of setting range
Default 15°C
Range 15~37°C
15 Function Setting Sanitary Tank Leaving Water Temperature for
Sanitary Water Heating
Description Adjusting range of 'Setting Sanitary Tank Leaving Water Temperature'
in sanitary water heating mode
Value #1 Note Upper Limit of setting range
Default 50°C
Range 50~80°C
Value #2 Note Lower Limit of setting range
Default 40°C
Range 30~40°C
21 Function Setting Electric Heater On/Off temperature
DIP switch No.6 = Off No.6 = Off
setting No.7 = On No.7 = Off
Description Setting for Using Half capacity Setting for Using Full capacity
of electric heater of electric heater
Value #1 Note
Base outdoor air temperature
Default 0°C
Range -15~18°C
Value #2 Note Not used
Default - 0°C
Range - 33°C
'Setting Air
Temperature' is
used when user
wants to set target
temperature by
room air
temperature.
'Setting Leaving
Water
Temperature' is
used when user
wants to set target
temperature by
leaving(from the
indoor unit) water
temperature.
'Setting Sanitary
Tank Leaving
Water
Temperature' is
used when user
wants to set water
temperature of
Sanitary Tank.
DIP Switch
setting is
described in
Chapter 8 of
Installation
Manual.
Outdoor air temperature where
half capacity of electric heater
starts operation.
Temperature gap (it means 'how
much colder than base outdoor
air temperature?')

Installation instruction
12 Air-to-Water Heat Pump Owner’s Manual
Code Item Detail Remark
22 Function Setting Cut-off Temperature in Cooling Mode
(FCU setting included)
Description Determine leaving water temperature when the product is turned off.
This function is used for preventing condensation
on the floor in cooling mode.
Value #1 Note Cut-off temperature. Value #1 is valid when Value #2 is
'01 (that means, FCU is installed)'."
Default 16°C
Range 16~25°C
Value #2 Note Determines if FCU is installed or not. '01' means 'FCU is
NOT installed', and '00' means 'FCU is installed.'
Default 00
Range 00(Equipped)~01(NOT Equipped)
23 Function Setting outdoor temperature range for Weather-dependent
operation
Description Setting outdoor Max/Min temperature for weather-dependent
operation
Value #1 Note Upper Limit of setting range
Default -10°C
Range -20~05°C
Value #2 Note Lower Limit of setting range
Default 15°C
Range 10~20°C
24 Function Setting indoor air temperature range for Weather-dependent
operation
Description Setting indoor Max/Min temperature for weather-dependent
operation
Value #1 Note Upper Limit of setting range
Default 30°C
Range 26~30°C
Value #2 Note Lower Limit of setting range
Default 25°C
Range 16~25°C
25 Function Setting leaving water temperature range for Weather-dependent operation
Description Setting leaving water Max/Min temperature for
weather-dependent operation
Value #1 Note Upper Limit of setting range
Default 40°C
Range 40~55°C
Value #2 Note Lower Limit of setting range
Default 25°C
Range 15~37°C
26 Function Setting Disinfection Operation
Description Setting start/maintain time for disinfection
Value #1 Note Enable/Disable of Disinfection Operation(00:Disable , 01:Enable)
Default 00
Range 00~01
Sanitary water
heating should be
enable
•If sanitary water
heating is disable,

Installation instruction
Owner’s Manual 13
ENGLISH
Code Item Detail Remark
Note Starting Date(Sunday:1,Monday:2, ···· ,Saturday:7)
Default 06
Range 01~07
Value #2 Note Starting Time in 24 hours(00~23)
Default 23
Range 00~23
27 Function Setting Disinfection Operation
Description Setting disinfection temperature
Value #1 Note Maximum heating temperature
Default 70°C
Range 40~70°C
Value #2 Note Maximum heating duration in minute
Default 10°C
Range 05~60°C
28 Function Setting control parameter for Sanitary water heating operation
Description See below notes for each values
Value #1 Note Temperature gap from Value #2 of Function Code 28
Default 05°C
Range 01~20°C
Value #2 Note Maximum temperature generated by AWHP compressor cycle
Default 48°C
Range 40~48°C
29 Function Setting control parameter for Sanitary water heating operation
Description See below notes for each values
Value #1 Note Temperature gap from target sanitary water temperature.
(This value is required to frequent On and Off of water tank heater)
Default 03°C
Range 02~04°C
Value #2 Note Determining heating demand priority between sanitary water tank
heating and under floor heating
Default 00
Range 00~01
2A Function Miscellaneous setting
Description Determine electric heater and water heater on and off
Value #1 Note 00 : Operate both Electric Heater and Sanitary Tank Heater
01 : Operate ONLY Sanitary Tank Heater
Default 00
Range 00~01
Value #2 Note Not used
Default -
Range -
Only available
when Sanitary
Water Tank is
installed.
the disinfection
mode will not be
operated although
Value #1 of Code
26 is set as '01'.
•To use
disinfection mode,
sanitary water
heating should be
enable.
❊Some contents may not be displayed depending on DIP switch setting in the indoor unit PCB

Installation instruction
14 Air-to-Water Heat Pump Owner’s Manual
Keep pressing Function Setting button
for 3 seconds to enter installer
setting mode until code is
displayed in timer segment.
1
Press set / clear button to start test run
mode.
2
Cooling mode will be operated during 18
minutes on this mode.
3
Installer Setting -Test Run
Test run should be performed when additional refrigerant charging is required. To charge the
refrigerant, the product must run in Cooling mode. Test run instantly makes the product working in
Cooling mode for 18 minutes.
❊Note
•If you press any kind of button during this mode, Test Run mode will be finished.
•After running 18 minutes under test run mode, system will automatically turn OFF.

Installation instruction
Owner’s Manual 15
ENGLISH
Keep pressing Function Setting button
for 3 seconds to enter
installer setting mode until
code displayed in timer
segment.
1
Repeat pressing button to select
Function code 03.
2
Set the value by pressing up, down button.
3
If you finish the setting, press set / clear
button to save the setting.
4
Press button to exit or system will
automatically exit after 25 seconds
without any input.
5
Installer Setting -Remote Air Sensor Connection
If user connects remote air sensor to control the product by room air temperature, the connection
information should be notified to the product.
Value Note Default
01
02
Remote air sensor is NOT connected and
NOT used
Remote air sensor is connected and used
01 : NOT connected
and NOT used
❊Note
If remote air sensor is connected but this function code is not set correctly, the product can not be
controlled by room air temperature.

Installation instruction
16 Air-to-Water Heat Pump Owner’s Manual
Keep pressing Function Setting button
for 3 seconds to enter
installer setting mode until
code displayed in timer
segment.
1
Repeat pressing button to select
Function code 04.
2
Set the value by pressing up, down button.
3
If you finish the setting, press set / clear
button to save the setting.
4
Press button to exit or system will
automatically exit after 25 seconds
without any input.
5
Installer Setting -Celsius (°C) / Fahrenheit (°F) Switching
Temperature is displayed in Celsius or Fahrenheit.
Value Note Default
01
02
Celcius
Fahrenheit
01 : Celcius

Installation instruction
Owner’s Manual 17
ENGLISH
Keep pressing Function Setting button
for 3 seconds to enter
installer setting mode until
code displayed in timer
segment.
1
Repeat pressing button to select
Function code 05.
2
Set the value by pressing up, down button.
3
If you finish the setting, press set / clear
button to save the setting.
4
Press button to exit or system will
automatically exit after 25 seconds
without any input.
5
Installer Setting -Setting Temperature Selection
The product can be operated according to air temperature or leaving water temperature. The
selection for setting temperature as air temperature or leaving water temperature is determined.
❊Note
Air temperature as setting temperature is ONLY available when Remote Air Sensor(PQRSTA0)
Connection is enabled and Function Code 03 is set as 02.
Value Note Default
01
02
Air temperature
Leaving Water temperature
02 : Leaving Water
temperature

Installation instruction
18 Air-to-Water Heat Pump Owner’s Manual
Keep pressing Function Setting button for 3
seconds to enter
installer setting mode until
code displayed in timer segment.
1
Repeat pressing button to select
Function code 06.
2
Set the value by pressing up, down button.
3
If you finish the setting, press set / clear
button to save the setting.
4
Press button to exit or system will
automatically exit after 25 seconds
without any input.
5
Installer Setting -Dry Contact Auto-Start Setting
This function allows the Dry contact-indoor unit operate under Auto Run mode or Manual mode with
remote control panel.
Value Note Default
01
02
Auto Start OFF
Auto Start ON
02 : Auto Start ON

Installation instruction
Owner’s Manual 19
ENGLISH
When Central Controller is installed, address assigning is set by this function.
Keep pressing Function Setting
button for 3 seconds to enter
installer setting mode until
code displayed in timer segment.
1
Repeat pressing button to select
Function code 07.
2
Set the Group No. by pressing up, down
button.
For example, In case of setting address as 'F5'.
First, Please change the Group number to 'F'
3
Move to Indoor No. part by pressing right
direction button.
4
Set the Indoor No. by pressing up, down
button.
5
If you finish the setting, press set / clear
button to save the setting.
6
Press button to exit or system will
automatically exit after 25 seconds
without any input.
7
Grop No.
Indoor No.
Installer Setting - Setting Address of Central Control

Installation instruction
20 Air-to-Water Heat Pump Owner’s Manual
Installer Setting -Setting Air Temperature in Cooling Mode
Determine cooling setting temperature range when air temperature is selected as setting temperature.
Following instruction shows how to change the range of setting temperature from 18 °C~30°C to 20 °C~25°C.
Keep pressing Function Setting button for
3 seconds to enter installer setting mode
until code displayed in timer segment.
1
Repeat pressing button to select
Function code 11.
Value #1 : Upper
Limit of setting range
Value #2 : Lower
Limit of setting range
2
Set the Value #1 by pressing up, down button.
Ex) setting Value as Value #1 = '25'
Value #2 = '20'
3
Move to Value #2 part by pressing right
direction button.
4
Set the Value #2 by pressing up, down
button.
5
If you finish the setting, press set / clear
button to save the setting.
6
Press button to exit or system will
automatically exit after 25 seconds
without any input.
77
Value Note Default Range
Value #1
Value #2
30
18
24~30
18~22
Upper Limit of setting range
Lower Limit of setting range
❊Note
•All values are in °C.
•Selection of °C or °F is based on the value
of Function Code 04.