LG THERMA V Split User guide

Comprehensive
application and
installation manual
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Installation check listConguration
System Design ApplicationsIntroduction

Comprehensive application
and installation manual
Contents
Split
Ⅰ. Introduction
1. Overview 008
2. Cycle Diag ram 009
3. Product Diagram 010
Ⅱ. System Design Application
1. System 1 014
2. System 2 015
3. System 3 017
4. System 4 019
5. System 5 024
6. System 6 027
7. System 7 030
8. System 8 033
9. System 9 035
10. System 10 037
11. System 11 039
12. System 12 044
Ⅲ. Con󽗉guration
1. Controller conguration 048
2. Dip S/W Setting 052
Ⅳ. Installation check list
1. Checklist 056
2. Test run 077
Please read this guide completely before installing
the product. Installation work must be performed in
accordance with the national wiring standards by
authorized personnel only.
Please retain this guide for future reference after
reading it thoroughly.
Installation check listConguration
System Design ApplicationsIntroduction

I. Introduction
1. Overview
2. Cycle Diagram
3. Product Diagram
Installation check listConguration
System Design ApplicationsIntroduction
Split

Installation check listConguration
System Design ApplicationsIntroduction
System capable of space cooling, heating and providing DHW AWHP stands for "Air to Water Heat
Pump" and generally refers to Therma V system.
• Split model
Ref. Pipes
[Outdoor unit]
Water Pipes
[Floor heating] [FCU] [Radiator] [Hotwater]
Water Pipes
[Indoor unit]
• Monobloc model
Ref. Pipes
[Outdoor unit]
Water Pipes
[Floor heating] [FCU] [Radiator] [Hotwater]
Water Pipes
[Indoor unit]
• Application
Ref. Pipes
[Outdoor unit]
Water Pipes
[Floor heating] [FCU] [Radiator] [Hotwater]
Water Pipes
[Indoor unit]
GAS SIDE
Service
Valve
(3 way)
EEV
Service
Valve
(3 way)
Indoor Unit
Plate Heat
Exchanger
Th2
Th3
Water. Out
Water. In
TH1
(Accessories)
TH6
TH4
Pressure
Sensor
Accumulator
Compressor
4 way
Valve
TH5
TH7
TH8
Outdoor Unit
Heat Exchanger
LIQUID SIDE
[Product : Split 3 ]
rd
Table of sensors
Category Symbol Meaning PCB Connector Remarks
Indoor
Unit
Th1 Remote air temperature
sensor
CN_ROOM
- Optional accessory (being sold
separately)
- Not shown in diagram
Th2 Inlet evaporator temperature
sensor
CN_PIPE_IN
- Meaning is expressed based on
Cooling mode.
Th3 Outlet evaporator temperature
sensor
CN_PIPE_OUT
Outdoor
Unit
Th4
Compressor-suction pipe
temperature sensor
CN_SUCTION
Th5 Compressor-discharge pipe
temperature sensor
CN_DISCHA
Th6 Condenser temperature
sensor
CN_C_PIPE
- Description is expressed based on
Cooling mode.
Th7 Outdoor air temperature
sensor
CN_AIR
Th8
Condenser middle temperature
sensor
CN_MID
EEV Electronic Expansion Valve CN_LEV1
Main components:
Heat exchanger (Refrigerant-Water)
Water pump
Electric heater / Strainer
Safety valve / Flow switch
Expansion tank / Remote controller
Main components:
Heat exchanger (Refrigerant-Water)
Water pump
Electric heater(Option)
Strainer/ Safety valve
Flow switch/ Expansion tank
Remote controller
008 009
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
1. Overview 2. Cycle Diagram

Water components
484
13 9
10
12
6
8
14 15
4
3
2
16
16
1
5
484
12311684.5
63.4
36.9 46.4
76 41
847.8
7
11
289.6
No Name Remark
1 Leaving Water Pipe Male PT 1 inch
2 Entering Water Pipe Male PT 1 inch
3 Refrigerant Pipe Ø9.52mm
4 Refrigerant Pipe Ø15.88mm
5 Water Pump Max Head 9.5 / 7 / 6 m
6 Safety Valve Open at water pressure 3 bar
7 Control Box PCB and terminal blocks
8 Thermal switch Cut-off power input to electric heater at 90 °C (manual return at 55 °C)
9 Flow Switch Minimum operation range at 15 LPM.
10 Plate Heat Exchanger Heat exchange between refrigerant and water
11 Pressure Gage Indicates circulating water pressure
12 Expansion Tank Absorbing Volume change of heated water
13 Air Vent Air purging when Charging water
14 Electric Heater Please refer to the below Page ‘Model name and related information’
15 Strainer Filtering and stacking particles inside circulating water
16 Shut-off valve To drain or to block water when pipe connecting
II. System Design
Applications
1. System 1
2. System 2
3. System 3
4. System 4
5. System 5
6. System 6
7. System 7
8. System 8
9. System 9
10. System 10
11. System 11
12. System 12
Installation check listConguration
System Design ApplicationsIntroduction
Split
010 _
COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
3. Product Diagram

Installation check listConguration
System Design ApplicationsIntroduction
System diagram
Space
heating /
cooling
DHW* Booster
heater** Remark
System 1
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X
System 2
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor
Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X
Remote
room
sensor
System 3
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
XOX
System 4
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
X O O Booster
heater
System 5
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O O X 3Way
valve
System 6
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X 2Way
valve
System diagram
Space
heating /
cooling
DHW* Booster
heater**
Remark
System 7
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X
Dry contact
System 8
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor
Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X Thermostat
System 9
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X
Thermostatic
valve
System 10
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O X X
• Buffer tank
• External
pump
System 11
3way V/V
2Way valve
Smart ThinQ
DHW tank
DHW
Temp. sensor
IDU
IDU
Remote room sensor Thermostat
IDU
DHW tank
DHW tank
DHW
Temp. sensor
IDU
IDU
DHW tank
DHW
Temp. sensor
IDU
IDU
IDU
Controller (3rd party)
Dry contact
IDU
IDU
FCUUFH
DHW
Temp. sensor
DHW
Temp. sensor
Buffer tank
IDU
External pump
IDU
O O X
Wi-Fi module
To be
installed
separately
System 12
DHW tank
DHW
Temp. sensor
IDU
DHW tank
DHW
Temp. sensor
IDU
XOX Solar
*DHW : Domestic hot water
**Booster Heater : Heater installed in tank
*DHW : Domestic hot water
**Booster Heater : Heater installed in tank
012 013
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System Design Applications

Installation check listConguration
System Design ApplicationsIntroduction
• System diagram
IDU
Purpose: Ams to provide generic oor heating/cooling operations.
Capable of setting up coil-based radiant heating and cooling system thanks to its simplied
installation structure - also enables heating and cooling by installing radiator/fan coil.
• Necessary conguration and feature
Dip s/w N/A Keep default See if 2 and 3 are off
Remote controller Use the default one attached to indoor
unit
No installation required
Additional provision not available
Leaving water temperature Set up by the remote controller Single temperature
control Control of leaving water temperature
• Dip s/w Setting
OFF
ON
1 23 45678
• System diagram
IDU
Remote room sensor
Purpose: Conguration for generic oor heating and cooling by utilizing indoor air temperature sensor.
Can be set up generally with radiator and oor heating coils, and product is operated based on
indoor air temperature setup.
• Necessary conguration and feature
Dip s/w N/A Keep default Check if 2 and 3 are off
Remote controller Use the default one attached to indoor
unit No installation required
Leaving water temperature Set up by remote controller Single temperature
control Control of indoor air temperature
Air temperature sensor
Installation
Air temperature sensor is an option and needs
to be purchased and installed separately.
P/n : PQRSTA0
Installer setting
Remote controller needs to be set up separately.
• Dip s/w Setting
OFF
ON
1 23 45678
014 015
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
1. System 1 2. System 2

Installation check listConguration
System Design ApplicationsIntroduction
• Installing remote temperature sensor
Remote temperature sensor can be installed any place a user wants to detect the temperature
Distance between the indoor unit and the remote air temperature sensor should be less than 15 m
due to length of the connection cable of remote air temperature sensor.
Connect the wire between CN_Room in PCB and remote room sensor
CN_ROOM
[Remote room sensor]
Press ‘up’ for 3 sec
• Installer setting
CN_ROOM
[Remote room sensor]
Press ‘up’ for 3 sec
Enter installer setup mode, then Set
Remote sensor active “Use” Set Temp.
sensor selection “Air” .
• System diagram
DHW tank
DHW
Temp. sensor
IDU
Purpose: Conguration for DHW exclusive operation. System is set up by connecting piping to heat
exchanger installed in DHW tank.
• Necessary conguration and feature
Dip s/w Separate setup is required Dip s/w No. 3: On
Remote controller
Use the default one attached to indoor unit No installation required
Leaving water temperature DHW temperature is set by remote
controller Single temperature
control Control of DHW temperature sensor DHW temperature can be set after
initiating heating operation
DHW temperature sensor
Installation
Temperature sensor that came with DHW
tank needs to be installed.
Booster heater If not applied, and tank kit is not used
• Dip s/w Setting
OFF
ON
1 23 45678
016 017
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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3. System 3

Installation check listConguration
System Design ApplicationsIntroduction
• Installing DHW temperature sensor
Length of DHW temperature sensor: 10 m (Provided as default)
Connect DHW temperature sensor to PCB CN-TH4 and insert sensor in the temperature sensor pocket
in tank.
Press ‘up’ for 3 sec
• Installer setting
For DHW operation
Select on installer setup whether to use booster heater alone or both backup heater and booster
heater.
Press ‘up’ for 3 sec
• System diagram
DHW tank
DHW
Temp. sensor
IDU
Purpose: Conguration for DHW exclusive operation. Control separately the heater installed the tank
where DHW operation load is great or uctuation of conditions is drastic.
Booster heater must be installed if DHW operation requires sterilization.
• Necessary conguration and feature
Dip s/w Separate setup is required Dip s/w No. 3: On
Remote controller Use the default one attached to indoor
unit No installation required
Leaving water temperature Set up by remote controller Single temperature
control Control of DHW temperature sensor DHW temperature can be set after
initiating heating operation
DHW temperature sensor
Installation
Temperature sensor that came with DHW
tank needs to be installed.
Booster heater If applied, and tank kit is not used Separate option
• Dip s/w Setting
OFF
ON
1 23 45678
Enter installer setup mode, then
Complete Heater priority conguration.
018 019
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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4. System 4

Installation check listConguration
System Design ApplicationsIntroduction
• Installing DHW temperature sensor
Length of DHW temperature sensor: 10 m (Provided as default)
Connect DHW temperature sensor to PCB CN-TH4 and insert sensor in the temperature sensor pocket
in tank.
DHW Tank Kit must be used for communication between DHW tank and indoor unit.
It’s for communication with the DHW tank which has electric heater.
• Installing tank KIT
Follow bellow procedures Step 1 ~ Step 6
Step 1. Find magnetic switch and ELB(MCCB) in the kit. Fit them into the indoor unit control box with a
braclet and screws.(symbol Ⓐat picture)
Step 2. ‘CN_B/HEAT(A)’(white connector)of the indoor unit PCB with magnetic switch contact using en-
closed cable(symbol Ⓑat the picture). Connect magnetic switch contactor port no. A1 and A2.
Step 3. Connect magnetic switch contactor port no.L1 and L3 with ELB(MCCB) port no. 2 and
4(symbol Ⓒat the picture).
Step 4. Connect magnetic switch contactor port no. T1 and T3 with terminal block 1 port 6 and 7(sym-
bol Ⓓat the picture).
Step 5. Connect ELB(MCCB) to Terminal Block.
1Ø Electric Heater Model →Connect ELB(MCCB) port no.1 and 3 with terminal block 3 port 3 and
4(symbol Ⓔat the picture).
3Ø Electric Heater Model →Connect ELB(MCCB) port no.1 and 3 with terminal block 3 port 1 and
2(symbol Ⓔat the picture).
Relay contactor
port no. assignment
ELB(MCCB) port no.
assignment
1 3
2 4
020 021
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics

Installation check listConguration
System Design ApplicationsIntroduction
1Ø Electric Heater model 3Ø Electric Heater model
(L)(N)
A
WATER
TANK
HEATER
BR BL
6
L7 N
(L)(N)
A
WATER
TANK
HEATER
BR BL
6
L7 N
(L)(N)
A
WATER
TANK
HEATER
BR BL
6
L7 N
(L)(N)
A
WATER
TANK
HEATER
BR BL
6
L7 N
• Installer setting
For DHW operation
Select on installer setup whether to use booster heater alone or both backup heater and booster
heater.
Sterilization is required in order to suppress germs in water stored in tank when installing DHW tank.
Set up whether to enable sterilization operation, sterilization temperature and duration.
022 023
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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Installation check listConguration
System Design ApplicationsIntroduction
• System diagram
3way V/V
IDU
DHW tank
DHW
Temp.
sensor
DHW
Temp.
sensor
DHW
Temp.
sensor
Purpose: To serve the need to use a single system for Space heating/cooling and Domestic hot water.
3Way valve must be installed to enable system.
• Necessary conguration and feature
Dip s/w Separate setup is required 2 off + 3 on :
Remote controller Use the default one attached to indoor
unit No installation required
Leaving water tempera-
ture Set up by remote controller Single temperature
control Select priority
1) DHW rst, 2) Floor heating Default: DHW
DHW temperature sensor
Installation
Temperature sensor that came with
DHW tank needs to be installed.
Installing 3Way v/v To be purchased and installed sepa-
rately
Booster heater If applied, and tank kit is not used Separate option
Installer setting Installer of remote controller needs to
be set up separately.
• Dip s/w Setting
OFF
ON
1 23 45678
• Installing temperature sensor and 3Way v/v
Connect solar thermal sensor to ‘CN_TH4’(Red connector) of the indoor unit PCB.
If the DHW tank sensor is connected, disconnect the sensor from PCB rst. Separate connector and
set p is required when installing both DHW temperature sensor and solar temperature sensor simulta-
neously (2pin for hot water, 2pin for solar)
Terminal Block 1
energizing water
pump for solar
thermal system
water flow switching between
under floor heating and
DHW tank heating
water flow switching between using
solar thermal heating and skipping
solar thermal heating
turn on or off DHW
tank heater
3WAY VALVE
(B)
WATER
PUMP
(B)
WATER
TANK
HEATER
3WAY VALVE
(A)
LL1N LN LLL1NN
123456 89710
3WAY VALVE: 3WAY VALVE (A)
- 230 V AC SPDT 3-wire type
- SPACE HEATING: TB1'S 9 and 10 are activated
- WATER TANK HEATING: TB1's 8 and 10 are activated
024 025
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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5. System 5

Installation check listConguration
System Design ApplicationsIntroduction
• Example of 3Way valve(Field Scope)
Voltage 230 V (±10 %) - 50–60 Hz
Protection class IP42
Operating time (angle of rotation 90°): 40 s
temperature -40~70 °C
[Type : 3 wires)
• Installer setting
For DHW operation
Select on installer setup whether to use booster heater alone or both backup heater and booster
heater.
Press ‘up’ for 3 sec
• System diagram
IDU
FCUUFH
2Way valve
Purpose: Conguration of focusing on FCU and oor heating in winter while focusing on FCU in summer
Install 2Way valve and set temperature to prevent dewing on oor.
• Necessary conguration and feature
Dip s/w N/A Keep default Check if 2 and 3 are off
Remote controller Use the default one attached to indoor unit No installation required
Leaving water temperature Set up by remote controller Single temperature
control Control of leaving water temperature
Installing 2Way v/v
To be purchased and installed separately Spec : 240 V
Installer setting Installer setting of remote controller
needs to be set up separately.
• Dip s/w Setting
OFF
ON
1 23 45678
026 027
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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6. System 6

Installation check listConguration
System Design ApplicationsIntroduction
• Installing 2way v/v
2way valve is required to control water ow during cooling operation. Role of 2way valve is to cut off
water ow into under oor loop in cooling mode when fan coil unit is equipped for cooling operation.
2way valve is a eld provided and installed component and needs to be installed in strict compliance
with the installation manual.
Especially check if the valve is NO(Normal Open) or NC(Normal close) type before installing it and
also check for any leak after installing the valve.
Terminal block 2
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2 N
14 15 16
Normal Open type should be connected to wire (NO) and wire (N) for
valve closing in cooling mode.
(NO) : Live signal (for Normal Open type) from PCB to 2way valve
(NC) : Live signal (for Normal Closed type) from PCB to 2way valve
(N) : Neutral signal from PCB to 2way valve
*Power : 230V AC
• Example of 2Way valve(Field Scope)
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2 N
14 15 16
Voltage 220-240 V, 50 Hz
Protection class IP20
Starting position normally closed
temperature -40~65 °C
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2 N
14 15 16
Wire Function
a = brown Line(Power supply)
b = blue neutral
c = green / yellow earth (ground)
• Installer setting
Press ‘up’ for 3 sec
Enter installer setup mode, then go to,
water supply off temp.during cooling
menu to set whether to use FCU and
temperature to prevent dewing.
028 029
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics

Installation check listConguration
System Design ApplicationsIntroduction
• System diagram
Controller (3rd party)
Dry contact
IDU
Purpose: System installation for generic oor heating/cooling based on indoor air temperature sensor
Radiator/fan coil based heating and cooling
• Necessary conguration and feature
Dip s/w N/A Keep default 2/3 OFF
Remote controller
Use the default one attached to indoor unit No installation required
Leaving water temperature Set up by remote controller Single temperature
Control Control of leaving water temperature
DRY CONTACT
Installation
Dry contact is an option and needs to
be purchased and installed separately.
Mode: General mode ON/OFF
P/n : PDRYCB000
Installing 3
rd
Controller To be purchased from 3rd party(Required)
Installer setting Remote controller needs to be set
up separately.
• Dip s/w Setting
OFF
ON
1 23 45678
• Instaling dry contact
LG Dry Contact is a solution for automatic control of air conditioning system at the owner's behest.
In simple words, it's a switch which can be used to turn the unit On/Off after getting the signal from
external sources like key-in lock, door or window switch etc specially used in Hotel rooms.
Press ‘up’ for 3 sec
[DRY CONTACT]
Cable (1ea)
1. CN-POWER: Connector
2. CN-CC: Indoor PCB Connector
3. CN_DRY (L): DRY CONTROLLER Connector
4. CN_DRY (SIG): DRY CONTROLLER Connector
5. CN_DRY (ERROR CHECK): ERROR Check Display Connector
6. CN_DRY (OPER STATE): Operation Display Connector
1
2
6
5
4
3
After changing any Dry contact setting, then you must press RESET switch to reect the setting.
030 031
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
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7. System 7

Installation check listConguration
System Design ApplicationsIntroduction
• Installer setting
Press ‘up’ for 3 sec
[DRY CONTACT]
Cable (1ea)
1. CN-POWER: Connector
2. CN-CC: Indoor PCB Connector
3. CN_DRY (L): DRY CONTROLLER Connector
4. CN_DRY (SIG): DRY CONTROLLER Connector
5. CN_DRY (ERROR CHECK): ERROR Check Display Connector
6. CN_DRY (OPER STATE): Operation Display Connector
1
2
6
5
4
3
• System diagram
Thermostat
IDU
Purpose: System installation for generic oor heating/cooling based on indoor air temperature sensor
Radiator/fan coil based heating and cooling
• Necessary conguration and feature
Dip s/w N/A 8 on
2/3 off
Remote controller
Use the default one attached to indoor
unit No installation required
Leaving water tempera-
ture Set up by remote controller Single temperature
control Control of leaving water temperature
Thermostat Installation Thermostat is an option and needs to
be purchased and installed separately. Spec : 230V
Installer setting Remote controller does not need to be
set up separately.
• Dip s/w Setting
OFF
ON
1 23 45678
Manual : 'off ' signal from drycontact Prod-
uct shall be 'off ' and locked.
'On' signal from dycontact, Prod-
uct shall be free from lock
Auto : 'off ' signal from drycontact Product
shall be 'off '.
'On' signal from dycontact, Product
shall run
032 033
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
8. System 8

Installation check listConguration
System Design ApplicationsIntroduction
• Instaling dry contact
To control by air temperature - Heating-Only type (230V AC)
Cooling/Heating type (230V AC with Mode selection switch)
Thermostat generates "Heating ON or Heating OFF" signal according to user"s heating target tempera-
ture. Thermostat generates both "Heating ON or Heating OFF" and "Cooling ON or Cooling OFF"
signal according to user"s heating and cooling target temperature.
Power supply for Indoor
unit and communication Connection for thermostat (230V AC)
Supporting type : Heating only or Heating/Cooling
opening or closingwater flow for FCU cooling
OUTDOOR UNIT 2WAY VALVE
(A)
THERMOSTAT
(Default : 230V AC)
1(L) 2(N) 3L1L2N LNL1 L2
11 12 13 14 15 16 17 18 19 20
Thermostat
(L)(N) (C)(H)
THERMOSTAT
(Default : 230 V AC)
17
L
BR
18
N
BL
19
L1
WH
20
L2
BK
Power supply for Indoor
unit and communication Connection for thermostat (230V AC)
Supporting type : Heating only or Heating/Cooling
opening or closingwater flow for FCU cooling
OUTDOOR UNIT 2WAY VALVE
(A)
THERMOSTAT
(Default : 230V AC)
1(L) 2(N) 3L1L2N LNL1 L2
11 12 13 14 15 16 17 18 19 20
Thermostat
(L)(N) (C)(H)
THERMOSTAT
(Default : 230 V AC)
17
L
BR
18
N
BL
19
L1
WH
20
L2
BK
(L) : Live signal from PCB to thermostat
(N) : Neutral signal from PCB to thermostat
(C) : Cooling signal from thermostat to PCB
(H) : Heating signal from thermostat to PCB
• Installer setting: N/A.
• System diagram
IDU
Purpose: Conguration for supplying hot water in two different temperatures to the room for heating.
Install a separate Thermostatic valveto set up and control 2 temperatures. Generally Thermo-
static valve is to be installed where temperature is lower than main operation temperature.
• Necessary conguration and feature
Dip s/w N/A Keep default Check if 2 and 3 are off
Remote controller Use the default one attached to indoor
unit No installation required
Leaving water tempera-
ture Set up by remote controller 1zone : Single temperature 2zone : Adjustable(by valve)
control Control of indoor air temperature
Thermostatic valve A valve needs to be purchased and
installed separately. 3rd party scope
Installer setting Remote controller does not need to
be set up separately.
034 035
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
9. System 9

Installation check listConguration
System Design ApplicationsIntroduction
• Dip s/w Setting
OFF
ON
1 23 45678
• Installing thermostatic valve
Thermostatic valve needs to be purchased and installed separately by installer.
Valves include remote sensor type, contact probe and thermostatic type, and select one depending on
site conditions.
Control is made separately and not in conjunction with LG product. Install as per requirements of
manufacturer.
[Valve shape] [Remote sensor][Contact probe] [Thermostatic ]
[Installation example][Valve open]
[Valve closed]
• Installer setting: N/A.
• System diagram
Buffer tank
IDU
External pump
Purpose: Conguration of installing buffer tank and external pump when the room to provide oor heating
for is too large and requires pump of a bigger capacity. Buffer tank enables a highly efcient
operation while external tank provides stable ow.
• Necessary conguration and feature
Dip s/w Separate setup is required Dip s/w No. 5: On
2/3 off
Remote controller Use the default one attached to indoor
unit
Leaving water tempera-
ture Set up by remote controller 1zone : Single temperature
Control Control of leaving water temperature
Buffer tank Requires installing buffer tank or mixing
tank
Field scope
Secondary pump Secondary pump needs to be installed
separately Field scope
Separate controller To be purchased and installed sepa-
rately DDC, Thermostat
Installer setting Remote controller needs to be set up
separately.
036 037
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
10. System 10

Installation check listConguration
System Design ApplicationsIntroduction
• Dip s/w Setting
OFF
ON
1 23 45678
• Installing external pump
External pumpis to be installed for cases where hot water needs to be circulated in large rooms.
For rooms with long loops, install an external pump along with a buffer tank in order to secure needed
ow and to ensure that ow to be provided to the product is larger than rated ow.
Power and control of External pump shall be congured separately from own product.
Set up link to 3rd Party controller or thermostat to operate external pump as needed.
OFF
ON
1 23 45678
Indoor unit
External pump
Buffer tank
External pump
Buffer tank
Thermost
at
DDC Controller
Field installation (3rd Party)
- External pump
- DDC controller (option)
- Thermostat (option)
- Electric Power
Additional power
• Installer setting: N/A.
• System diagram
Smart ThinQ
IDU
Purpose: Enabling remote system operation from smartphone. Available functions include selection of
operation mode, DHW, temperature setup and scheduling.
• Necessary conguration and feature
Dip s/w Separate setup is required Default
Remote controller Use the default one attached to indoor
unit
Leaving water tempera-
ture
Set up by remote controller and Wi-Fi
conguration 1zone : Single temperature
Control Control of leaving water temperature
Wi-Fi controller To be purchased and installed sepa-
rately
Wi-Fi Modem (WLANDongle)
P/N : PWYREW000 (Cable)
Installer setting Remote controller needs to be set
up separately.
A network-enabled smartphone, a router, the LG SmartThinQ app and a Wi-Fi modem are needed in
order to use the app and its functions.
038 039
_ COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
11. System 11