LG Dry Contact User manual

www.lg.com
INSTALLATION MANUAL
AIR
CONDITIONER
Dry Contact for thermostat
Original instruction
LG Electronics Inc.
EU Representative : LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
Manufacturer: LG Electronics Inc. Changwon 2nd factory, 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA
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.
Copyright © 2019 LG Electronics Inc. All Rights Reserved.
MFL69265526
Rev.00_012219
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
PORTUGUÊS
MAGYAR
БЪЛГАРСКИ
SRPSKI HRVATSKI SVENSKA NORSK SUOMI DANSK
EESTI KEEL
MALTI
SLOVENČINA
SLOVENŠČINA
LATVIEŠU VALODA
LIETUVIŲ KALBA
GAEILGE
МАКЕДОНСКИ
SHQIP
ÍSLENSKA BOSANSKI

Important Safety Instructions
2Dry contact for thermostat Installation manual 3
ENGLISH
Important Safety Instructions
3 IMPORTANT SAFETY INSTRUCTIONS
8 OVERVIEW
9 PART DESCRIPTON
10 Installation
11 SETTING AND USING METHOD
11 Power supply and indoor unit connection
12 Setting of Contact Signal Input
13 Setting of ‘OPER_SW’
16 Setting of ‘TEMP_SW’
17 Installation of thermostat
22 Indoor unit monitoring
23 Function table for the input signal (For AWHP Indoor unit)
TABLE OF CONTENTS
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 or repairs made by unqualified
persons can result in hazards to you and
others.
• Installation work must be performed in
accordance with the National Electric Code
by qualified and authorized personnel only.
• The information contained in the manual is
intended for use by a qualified service
technician familiar with safety procedures
and equipped with the proper tools and test
instruments.
!
!
!
Table of contents

Important Safety Instructions
Installation manual 5
Important Safety Instructions
4Dry contact for thermostat
ENGLISH
• Failure to carefully read and follow all
instructions in this manual can result in
equipment malfunction, property damage,
personal injury and/or death.
Installation
• Be sure to request to the service center or
installation specialty store when installing
products. It will cause fire or electric shock
or explosion or injury.
• Request to the service center or installation
specialty store when reinstalling the installed
product. It will cause fire or electric shock or
explosion or injury.
• Do not disassemble, fix, and modify
products randomly. It will cause fire or
electric shock.
• Be sure to turn off power before installation.
It will cause electric shock.
• Installation work must be performed in
accordance with the national wiring
standards by authorized personnel only.
• Always perform grounding. Otherwise, it
may cause electrical shock.
• You need to use a safely insulated power
supply which follows IEC61558-2-6 anc
NEC Class2. If you do not follow, It may
cause fire, electric shock, explosion or
injury.
• Securely attach the electrical part cover to
Module. If the electric part cover of Module
is not attached securely, it could result in a
fire or electric shock due to dust, water, etc.
• Make the connections securely so that the
outside force of the cable may not be
applied to the terminals. Inadequate
connection and fastening may generate
heat and cause a fire.
In-use
• Do not place flammable stuffs close to the
product. It will cause fire.
• Do not allow water to run into the product. It
will cause electric shock or breakdown.
• Do not give the shock to the product. It will
cause breakdown when giving the shock to
the product.
• Request to the service center or installation
specialty store when the product becomes
wet. It will cause fire or electric shock.
• Do not give the shock using sharp and
pointed objects. It will cause breakdown by
damaging parts.

Important Safety Instructions
Installation manual 7
ENGLISH
Important Safety Instructions
6Dry contact for thermostat
• Do not touch the board when the power is
connected. It can cause a fire, electric
shock, explosion, injury and problem to the
product.
• Unplug the unit if strange sounds, smell, or
smoke comes from it. Otherwise, it may
cause electrical shock or a fire.
• The appliance must only be supplied at
safety extra low voltage corresponding to
the marking on the appliance.
• This appliance is not intended to be
accessible to the general public.
CAUTION
In-use
• Do not clean using the powerful detergent
like solvent but use soft cloths. It will cause
fire or product deformation.
• Do not press the screen using powerful
pressure or select two buttons. It will cause
product breakdown or malfunction.
• Do not touch or pull the lead wire with wet
hands. It will cause product breakdown or
electric shock.
• This appliance is not intended for use by
persons (including children) with reduced
!
physical, sensory or mental capabilities, or
lack of experience and knowledge, unless
they have been given supervision or
instruction concerning use of the appliance
by a person responsible for their safety.
Children should be supervised to ensure
that they do not play with the appliance.
• This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or mental
capabilities or lack of experience and
knowledge if they have been given
supervision or instruction concerning use of
the appliance in a safe way and understand
the hazards involved. Children shall not play
with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.

Part Descripton
Installation manual 9
Overview
8Dry contact for thermostat
ENGLISH
Overview
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.
It’s a small PCB that either can be fit inside the control box of Indoor unit or can be outside the unit in a plastic case
if there is no sufficient space inside the Indoor unit.
Apart from simple installation, it can also be linked to Central Controller via Indoor unit PI485 pcb. For this, all
connecting wires & an additional small pcb for looping is also provided along with Dry Contact.
Dry Contact can be used in two ways.
1. It can be used to actually turn On/Off the system on receiving the signal from the source.
In this case, user doesn't need to use remote controller anymore to turn On/Off the system.
However all the further settings like temperature, fan speed, mode etc can be done through remote controller
only.
2. Other way is almost similar as above but in this case, after getting the On signal from the external source, user
has to turn On the system from remote controller only. Dry contact just activates the system.
However system can be turned Off directly from the external source. So only On mode is different here.
So in both of above conditions, system can’t be operated without signal from external source which prevents
unnecessary use of system & facilitates its operation only when its required.
These settings can be selected from the remote controller whose details have been explained in the later part of
this manual
So depending upon the requirement, Dry Contact offers a variety of applications to suit the customer’s requirement
in the best possible way.
Minimum cross-sectional area of conductors
Rated current of appliance
A
Nominal cross-sectional area
mm2
≤0.2
>0.2 and ≤3
>3 and ≤6
>6 and ≤10
>10 and ≤16
>16 and ≤25
>25 and ≤32
>32 and ≤40
>40 and ≤63
Tinsel cord a
0.5 a
0.75
1.0 (0.75)b
1.5 (1.0)b
2.5
4
6
10
hIf the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
hMeans for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
hQualified service technician is only possible to access to product.
Part Descripton
1. CN_INDOOR : Connector for indoor unit
2. VS_SW : Switch to select External Voltage or Non Voltage for input contact signal
3. CN_OUT(O1,O2) : Output terminal to show whether the indoor unit is operating (Relay contact)
4. CN_OUT(E3,E4) : Output terminal to show whether there is an error with the indoor unit (Relay contact)
5. TEMP_SW : Switch to set the desired temperature of the indoor unit
6. OPER_SW : Switch to select whether to use set function of Dry contact
7. CN_OPER : Input terminal for thermo & operation signal
8. CN_MODE : Input terminal for Mode signal
9. CN_WIND : Input terminal for Wind signal
10. LD01 : LED to display the status of Dry contact Module
11. RST_SW : Reset switch
DRY CONTACT FOR THERMOSTAT
PCB
Front Case Rear Case
ISO View
Side
Cable(1 EA)
(For Connecting with indoor unit)
Installation Manual
Side
3
6
10
1
5
8
9
7
2
11
4
* Others :
Screw 4 EA(For installation)

1) Loosen and remove two screws that secure the product.
2) Position the rear case to the direction towards to the connector for convenient cable
arrangement.
3) Secure the rear case on the installation place using the
supplied fixing screws.
4) Remove knock out shapes on the rear case (4-sided)
according to the connector’s size and direction.
Installation manual 1110 Dry contact for thermostat
ENGLISH
Setting and using method
Power supply and indoor unit connection
After change any Dry contact setting, then you must press RESET switch to reflect the setting.
n
When using the Dry contact for communication independently
Indoor unit
PCB
CN_INDOOR
CN_INDOOR
CN_INDOOR
Part Descripton
5) Connect the connection wires properly according to the connection method.
(Refer to the instruction and set-up description)
6) Set the switch according to the setting method. (Refer to the instruction and set-up description)
7) Tighten the fixing screws on the top and bottom of the case.
CAUTION
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the central controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the central controller.
!
Installation Setting and using method

Installation manual 1312 Dry contact for thermostat
ENGLISH
Setting and using method
Setting of ‘OPER_SW’
nUsing ‘OPER_SW’ , select the Option of control Function as
described below
Notes
• Information of ‘OPER_SW’ is sensed only initial step by Dry contact module therefore , once the
configuration changed , Reset of Dry contact module is required.
• After power input or unit’s reset , wait 25~30 seconds(Display LED 10 times blinking) for unit
stabilization then Dry contact module will operate normally.
OPER_SW
1) Enable CN_WIND signal – Amount of wind flow (Low, Middle, High) signal enable
2) Enable Thermo ON/OFF input signal
- Desired Temperature 18 ℃ in cooling mode
- Desired Temperature 30 ℃ in heating mode
- No function in FAN mode
3) Enable CN_MODE signal – Operation mode (Cool, Heat, Fan) signal enable
4) Enable Thermostat priority control mode – Indoor’s remote-controller signal will be disregarded
No. WIND Signal
en/disable
Thermal
en/disable
Oper Mode
en/disable
Dry Contact Control
Priority
0 Disable Disable Disable Disable
1 Disable Disable Disable Enable4)
2 Disable Disable Enable3) Disable
3 Disable Disable Enable Enable
4 Disable Enable2) Disable Disable
5 Disable Enable Disable Enable
6 Disable Enable Enable Disable
7 Disable Enable Enable Enable
8 Enable 1) Disable Disable Disable
9 Enable Disable Disable Enable
A Enable Disable Enable Disable
B Enable Disable Enable Enable
C Enable Enable Disable Disable
D Enable Enable Disable Enable
E Enable Enable Enable Disable
F Enable Enable Enable Enable
<OPER_SW Function>
Setting and using method
Setting of Contact Signal Input
nFor input contact closure only(No power input)
nFor input contact voltage : DC 12 V, AC 24 V
COMM
Themal Operation COMM
FAN
HEAT COOL
LOW
MIDDLE HIGH
Notes
Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage
Connect separate
External voltage of
DC 12 V, AC 24 V
Thermostat
LG does not
supply this section
(Field supply)
Thermostat
LG does not
supply this section
(Field supply)
COMM
Themal Operation COMM
FAN
HEAT COOL
LOW
MIDDLE HIGH

Installation manual 1514 Dry contact for thermostat
ENGLISH
Setting and using method
nFunction table for the selection of ‘OPER_SW’ and the input
signal
Notes
1) Thermal On : This input will change automatically desired temperature
Desired Temperature 18 °C In cooling mode
Desired Temperature 30 °C In heating mode
No function In FAN mode
COMM
Themal Operation COMM
FAN
HEAT COOL
LOW
MIDDLE HIGH
OPER_SW
OPER_SW CN_MODE input Function
FAN HEAT COOL
2,3,6,7,A,B,E,F
0 0 0 NA
0 0 1 COOL
0 1 0 HEAT
0 1 1 NA
1 0 0 FAN
1 0 1 NA
1 1 0 NA
1 1 1 NA
Others - - - NA
OPER_SW CN_WIND input Function
Low Middle High
8,9,A,B,C,D,E,F
0 0 0 NA
0 0 1 High
0 1 0 Middle
0 1 1 NA
1 0 0 Low
1 0 1 NA
1 1 0 NA
1 1 1 NA
Others - - - NA
OPER_SW CN_OPER Function
Thermal Operation
4,5,6,7,C,D,E,F
0 0 Thermal Off + Stop
0 1 Thermal Off + Run
1 0 Thermal On + Stop
1 1 Thermal On + Run
Others - - NA
Setting and using method
Use WIND Signal?
Set the switch ‘0 ~ 7’
Use Thermal function?
Use Operation mode?
Switch 0
Set the switch ‘0 ~ 3’
Set the switch ‘0 ~ 1’ Set the switch ‘2 ~ 3’
Switch 1 Switch 2 Switch 3 Switch 4 Switch 5 Switch 6 Switch 7
Set the switch ‘4 ~ 7’
Use Operation mode?
YES
NO
NO
YES
NO
NO YESNO YESNO YESNO
NO
YES YES
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use WIND Signal?
Set the switch ‘8 ~ F’
Use Thermal function?
Use Operation mode?
Switch 8
Set the switch ‘8 ~ B’
Set the switch ‘8 ~ 9’ Set the switch ‘A ~ B’ Set the switch ‘C ~ D’ Set the switch ‘E ~ F’
Switch 9 Switch A Switch B Switch C Switch D Switch E Switch F
Set the switch ‘C ~ F’
Use Operation mode?
YES
YES
NO
YES
NO
NO YESNO YESNO YESNO
NO
YES YES
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Set the switch ‘4 ~ 5’ Set the switch ‘6 ~ 7’
-. When not using WIND signal
-. When using WIND signal
nFlow Chart for ‘OPER_SW’
Notes
• When you change a function with remote control without setting Dry_contact control priority the display
condition between remote control and controller can be different.

Installation manual 1716 Dry contact for thermostat
ENGLISH
Setting and using method
Installation of thermostat
nWhen interlocking with thermostat, select the option of
control function as described below.
OPER_SW
TEMP_SW
<Switch Function>
TEMP_SW OPER_SW Thermostat mode WIND Signal en/disable
F
8, 9, E, F Conventional AC Unit Thermostat Disable
0, 1, 6, 7 Enable
A, B Heat Pump Thermostat_O
Terminal
Disable
2, 3 Enable
C, D Heat Pump Thermostat_B
Terminal
Disable
4, 5 Enable
1) When interlocking with thermostat, set TEMP_SW to F.
2) Enable CN_WIND signal – Amount of wind flow(Low, Middle, High) signal enable
Notes
• Information of ‘OPER_SW’ is sensed only initial step by Dry contact module therefore , once the
configuration changed , Reset of Dry contact module is required.
• After power input or unit’s reset , wait 25~30 seconds(Display LED 10 times blinking) for unit
stabilization then Dry contact module will operate normally.
• Do not use desired temperature setting function when interlocking with thermostat.
Setting and using method
Setting of ‘TEMP_SW’
nWhen setting the desired temperature of the Dry contact
Module
: When operating the indoor unit using Dry contact module’s desired temperature, set the desired
temperature according to the ‘TEMP_SW’ setting.
If Thermostat priority control mode is disabled, the desired temperature can be reset by other controller
- Use the ‘TEMP_SW’ to set the temperature as shown below.
TEMP
(°C)
'TEMP SW'
setting
Not use Dry Contact
module's Desired
temp function
0
18 19 20 21 22
12345
TEMP
(°C)
'TEMP SW'
setting
23 24 25 26 27 28 29 30
6789ABCD
*. E, F : Reserved

Installation manual 1918 Dry contact for thermostat
ENGLISH
Setting and using method
Notes
• IDU Fan logic, depending on model selected, may delay IDU fan operation momentarily during a cold
start heat call. This function allows IDU coil to warm up prior to operating fan in some IDU models.
• Thermostats that use resistive anticipation are not supported at this time.
• Verify documentation of desired thermostat so that the logic is same as shown in the table above.
Thermostat
LG does not supply this section
(Field supply)
LOW
MIDDLE HIGH
L
L
NLL
Operation FAN HEAT COOL
COMM
C
AC 24 V
RGWY
nFor conventional thermostat signal input
Thermostat Fan & System Switch Input IDU Response
[Mode / Thermal / Fan]
FAN
[Auto / On]
MODE
[Cool / Heat / Off] Operation FAN [G]
HEAT
[W]
COOL
[Y]
- - - 0 - - - Disable Operation
Auto
OFF - 1 0 0 0 Off
Cool RT > SP 1 1 0 1 Cool / On / On
RT < SP 1 0 0 0 Enable
Heat RT < SP 1 1 1 0 Heat/ On/On
RT > SP 1 0 0 0 Off
ON
FAN - 1 1 0 0 Fan/ Off/ On
Cool RT > SP 1 1 0 1 Cool/ On/ On
RT < SP 1 1 0 0 Fan/ Off/ On
Heat RT < SP 1 1 1 0 Heat/ On/ On
RT > SP 1 1 0 0 Fan/ Off/ On
Setting and using method
nDetails of Installation for thermostat
1) In case of Occupancy sensor,
- When motion is detected by the sensor, Indoor unit is enabled.
- Otherwise, Indoor unit is disabled.
2) In case of Emergency Stop or Security option.
- When emergency condition occurs, Indoor unit is disabled.
- Otherwise, Indoor unit is enabled.
Reference Cases
C
AC 24 V L
N
R
Security
Emergency Stop
Occupancy Sensor
※RT : Room Temperature
※SP : Set Point

Installation manual 2120 Dry contact for thermostat
ENGLISH
Setting and using method
Thermostat
LG does not supply this section
(Field supply)
LOW
MIDDLE HIGH
LLL
Operation Thermal
FAN
HEAT
COMM
L
N
C
AC 24 V
RYGB
nFor heat pump thermostat with B terminal signal input
Thermostat Fan & System Switch Input IDU Response
[Mode / Thermal / Fan]
FAN
[Auto / On]
MODE
[Cool / Heat / Off] Operation Thermal [Y]
FAN
[G]
HEAT
[B]
- - - 0 - - - Disable Operation
Auto
OFF - 1 0 0 0 Off
Cool RT > SP 1 1 0 0 Cool / On / On
RT < SP 1 0 0 0 Off
Heat RT < SP 1 1 0 1 Heat/ On/On
RT > SP 1 0 0 1 Off
ON
OFF - 1 0 1 0 Fan/ Off/ On
Cool RT > SP 1 1 1 0 Cool/ On/ On
RT < SP 1 0 1 0 Fan/ Off/ On
Heat RT < SP 1 1 1 1 Heat/ On/ On
RT > SP 1 0 1 1 Fan/ Off/ On
Notes
• Thermostats that close contacts "O" or "B" during Cool or Heat call only have not been verified. "O"
and/or "B" contact closure must be maintained during respective cycle / mode selection.
• IDU Fan logic, depending on model selected, may delay IDU fan operation momentarily during a cold
start heat call. This function allows IDU coil to warm up prior to operating fan in some IDU models.
• Thermostats that use resistive anticipation are not supported at this time.
• Verify documentation of desired thermostat so that the logic is same as shown in the table above.
Setting and using method
Thermostat
LG does not supply this section
(Field supply)
LOW
MIDDLE HIGH
L
L
N
LL
Operation Thermal
FAN
COOL
COMM
C
AC 24 V
RYGO
nFor heat pump thermostat with O terminal signal input
Thermostat Fan & System Switch Input IDU Response
[Mode / Thermal / Fan]
FAN
[Auto / On]
MODE
[Cool / Heat / Off] Operation Thermal [Y]
FAN
[G]
COOL
[O]
- - - 0 - - - Disable Operation
Auto
OFF - 1 0 0 0 Off
Cool RT > SP 1 1 0 1 Cool / On / On
RT < SP 1 0 0 1 Off
Heat RT < SP 1 1 0 0 Heat/ On/On
RT > SP 1 0 0 0 Off
ON
FAN - 1 0 1 0 Fan/ Off/ On
Cool RT > SP 1 1 1 1 Cool/ On/ On
RT < SP 1 0 1 1 Fan/ Off/ On
Heat RT < SP 1 1 1 0 Heat/ On/ On
RT > SP 1 0 1 0 Fan/ Off/ On
Notes
• Thermostats that close contacts "O" or "B" during Cool or Heat call only have not been verified. "O"
and/or "B" contact closure must be maintained during respective cycle / mode selection.
• IDU Fan logic, depending on model selected, may delay IDU fan operation momentarily during a cold
start heat call. This function allows IDU coil to warm up prior to operating fan in some IDU models.
• Thermostats that use resistive anticipation are not supported at this time.
• Verify documentation of desired thermostat so that the logic is same as shown in the table above.
※RT : Room Temperature
※SP : Set Point ※RT : Room Temperature
※SP : Set Point

Setting and using method
Installation manual 2322 Dry contact for thermostat
ENGLISH
Setting and using method
Indoor unit monitoring Function table for the input signal (For AWHP Indoor unit)
nMonitoring whether the indoor unit is operating: Refer to
below and connect to the control device that you want to
control.
Error Display
Field Supply
(Depends on Operation display power type)
Power
AC or DC
Field Supply
(Depends on Error display power type)
Power
AC or DC
Operation Display
CAUTION
Field supply power should not use more than DC 12 V (0.5 A), AC 24 V (0.5 A).
!
nMonitoring indoor unit error: Refer to below and connect to
the control device that you want to control.
Notes
Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage
Connect separate
External voltage of
DC 12 V, AC 24 V
Thermostat
LG does not
supply this section
(Field supply)
No power input DC 12 V, AC 24 V
COMM
Themal Operation COMM
AUTO
HEAT COOL
DHW NIGHT SILENT EMERGENCY MODE DHW NIGHT SILENT EMERGENCY MODE
COMM
Themal Operation COMM
AUTO
HEAT COOL
※If Operation input was 0(Operation stop), Thermal input and CN_MODE input don't work.
※If Thermal input was 0(Thermal Off), CN_MODE input doesn't work.
※If both Operation input and DHW input were 0(Stop, Off), Night silent input and Emergency mode input
don't work.
CN_OPER CN_MODE Function
Operation Thermal AUTO HEAT COOL
1 1 0 0 0 NA
1 1 0 0 1 COOL
1 1 0 1 0 HEAT
1 1 0 1 1 NA
1 1 1 0 0 AUTO
1 1 1 0 1 NA
1 1 1 1 0 NA
1 1 1 1 1 NA
CN_WIND Function
DHW On
Off
NIGHT SILENT On
Off
EMERGENCY MODE On
Off

LG Electronics Inc.
EU Representative : LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
Manufacturer : LG Electronics Inc. Changwon 2nd factory, 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA

www.lg.com
INSTALLATION MANUAL
AIR
CONDITIONER
Dry Contact For Thermostat
PDRYCB300
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.
Copyright © 2015 - 2018 LG Electronics Inc. All Rights Reserved.
MFL69265503
Rev.01_041918
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
PORTUGUÊS
MAGYAR
БЪЛГАРСKN
SRPSKI HRVATSKI SVENSKA NORSK SUOMI DANSK
EESTI KEEL
MALTI
SLOVENČINA
SLOVENŠČINA
LATVIEŠU VALODA
LIETUVIŲ KALBA
GAEILGE
МАКЕДОНСКИ
SHQIP
ÍSLENSKA BOSANSKI

Safety Precautions
2Dry contact for thermostat Installation manual 3
ENGLISH
Dry contact for thermostat Owner’s & installation manual
TABLE OF CONTENTS
nSafety Precautions .............................................................3~5
nName of each part ..................................................................6
nInstallation Method .............................................................7~8
Installation.................................................................................................8
nSetting and using method ................................................9~20
1. Power supply and indoor unit connection ...........................................9
2. Setting of Contact Signal Input ..........................................................10
3. Setting of ‘SETTING_SW’..................................................................11
4. Setting of ‘TEMP_SW’ .......................................................................14
5. Installation of thermostat....................................................................15
6. Indoor unit monitoring ........................................................................20
7. Function table for the input signal (For AWHP Indoor unit)...............21
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nMeanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
WARNING
nInstallation
Service
Center
Service
Center
Don’t touch with the hands
while the power is on.
• Cause fire, electric shock,
explosion or injury.
Product installation must
be referred to a service
center or installation shop.
• Cause fire, electric shock,
explosion or injury.
Request installation from
installation shop or service
center when reinstalling
the product.
• Cause fire, electric shock,
explosion or injury.

Safety Precautions
Installation manual 5
Safety Precautions
4Dry contact for thermostat
ENGLISH
Standardized
product
Do not install the product
in the place where rain can
get to the product.
• Cause product failure
Do not install the unit in
humid locations.
• Cause product failure
Do not put the product
closer to fire.
• Cause fire
Do not install in a place
that cannot withstand the
weight of the product.
• The product may get
damaged or may break.
Do not install the product
to a place that generates
oil, steam, salt, sulfuric
gas, etc.
• Cause the product’s
deformation or failure.
Use standardized Product.
• Cause product failure
Do not change or extend
power lines arbitrarily.
• Cause fire or electric shock.
Do not give a shock to the
product.
• If you give a shock to the
product, it may cause the
product’s failure.
Do not use a heater near
the power line.
• Cause fire or electric shock.
nOperation
Service
Center
STOP
Do not spill water inside of
the product.
• Cause electric shock or
breakdown.
If the product has been
inundated, you must refer to
a service center or
installation shop.
• It can cause a fire.
Children and elderly use the
product under the
guardian’s supervision.
• Cause accidents and product
failures.
Do not use for special
purpose / place such as
conserving flora and fauna,
precision instruments, art.
• Otherwise, it can cause property
damage.
Remove the power plug
when cleaning.
• Cause fire or electric shock.
Do not place heavy objects
on the power line.
• Cause fire or electric shock.
Do not disassemble, repair,
or modify the product.
• Cause fire or electric shock.
Do not touch with wet
hands.
• Cause fire or electric shock.

Installation Method
Installation manual 7
Name of each part
6Dry contact for thermostat
ENGLISH
Name of each part
1. CN_INDOOR : Connector for indoor unit
2. CHANGE_OVER_SW : Switch to select External Voltage or Non Voltage for input contact signal
3. CN_OUT(O1,O2) : Output terminal to show whether the indoor unit is operating (Relay contact)
4. CN_OUT(E3,E4) : Output terminal to show whether there is an error with the indoor unit (Relay contact)
5. TEMP_SW : Switch to set the desired temperature of the indoor unit
6. SETTING_SW : Switch to select whether to use set function of Dry contact
7. CN_Ther/oper : Input terminal for thermo & operation signal
8. CN_MODE : Input terminal for Mode signal
9. CN_WIND : Input terminal for Wind signal
10. DISPLAY_LED : LED to display the status of Dry contact Module
11. RESET_SW : Reset switch
DRY CONTACT FOR THERMOSTAT
8
9
10
6
5
3
4
1
7
2
11
PCB
Front Case Rear Case
ISO View
Side
Cable(1 EA)
(For Connecting with indoor unit)
Installation Manual
Side
* Others :
Screw 4 EA(For installation)
Installation Method
Minimum cross-sectional area of conductors
Rated current of appliance
A
Nominal cross-sectional area
mm2
≤0,2
>0,2 and ≤3
>3 and ≤6
>6 and ≤10
>10 and ≤16
>16 and ≤25
>25 and ≤32
>32 and ≤40
>40 and ≤63
Tinsel cord a
0,5 a
0,75
1,0 (0,75)b
1,5 (1,0)b
2,5
4
6
10
* aThese cords may only be used if their length does not exceed 2 m between the point where the
cord or cord guard enters the appliance and the entry to the plug.
bCords having the cross-sectional areas indicated in the parentheses may be used for portable
appliances if their length does not exceed 2 m.
NOTE: For supply cords supplied with multi-phase appliances, the nominal cross-sectional area of
the conductors is based on the maximum cross-sectional area of the conductors per phase at
the supply cord connection to the appliance terminals.
hIf the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
hMeans for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
hQualified service technician is only possible to access to product.

1) Loosen and remove two screws that secure the product.
2) Position the rear case to the direction towards to the connector for convenient cable
arrangement.
3) Secure the rear case on the installation place using the
supplied fixing screws.
4) Remove knock out shapes on the rear case (4-sided)
according to the connector’s size and direction.
Installation manual 98 Dry contact for thermostat
ENGLISH
Setting and using method
Setting and using method
1. Power supply and indoor unit connection
After change any Dry contact setting, then you must press RESET switch to reflect the setting.
n
When using the Dry contact for communication independently
Indoor unit
PCB
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper CN_MODE
CN_WIND
CN_INDOOR
DISPLAY_LED
TEMP_SW
SETTING_SW
CN_OUT
CN_PI485
Installation Method
5) Connect the connection wires properly according to the connection method.
(Refer to the instruction and set-up description)
6) Set the switch according to the setting method. (Refer to the instruction and set-up description)
7) Tighten the fixing screws on the top and bottom of the case.
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the central controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the central controller.
CAUTION
Installation

Installation manual 1110 Dry contact for thermostat
ENGLISH
Setting and using method
3. Setting of ‘SETTING_SW’
nUsing ‘SETTING_SW’ , select the Option of control Function
as described below
Notes
• Information of ‘SETTING_SW’ is sensed only initial step by Dry contact module therefore , once the
configuration changed , Reset of Dry contact module is required.
• After power input or unit’s reset , wait 25~30 sec(Display LED 10 times blinking) for unit stabilization
then Dry contact module will operate normally.
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper CN_MODE
CN_WIND
CN_INDOOR
DISPLAY_LED
TEMP_SW
SETTING_SW
CN_OUT
CN_PI485
SETTING_SW
1) Enable CN_WIND signal – Amount of wind flow (Low, Middle, High) signal enable
2) Enable Thermo ON/OFF input signal
- Desired Temperature 18 ℃ in cooling mode
- Desired Temperature 30 ℃ in heating mode
- No function in FAN mode
3) Enable CN_MODE signal – Operation mode (Cool, Heat, Fan) signal enable
4) Enable Thermostat priority control mode – Indoor’s remote-controller signal will be disregarded
No. WIND Signal
en/disable
Thermal
en/disable
Oper Mode
en/disable
Dry Contact Control
Priority
0 Disable Disable Disable Disable
1 Disable Disable Disable Enable4)
2 Disable Disable Enable3) Disable
3 Disable Disable Enable Enable
4 Disable Enable2) Disable Disable
5 Disable Enable Disable Enable
6 Disable Enable Enable Disable
7 Disable Enable Enable Enable
8 Enable 1) Disable Disable Disable
9 Enable Disable Disable Enable
A Enable Disable Enable Disable
B Enable Disable Enable Enable
C Enable Enable Disable Disable
D Enable Enable Disable Enable
E Enable Enable Enable Disable
F Enable Enable Enable Enable
<SETTING_SW Function>
Setting and using method
2. Setting of Contact Signal Input
nFor input contact closure only(No power input)
nFor input contact voltage : DC 12 V, 24 V~
Notes
Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage
NOT USE
CHANGE
OVER_SW
VOLT NON
VOLT NOT
USE
CHANGE
OVER_SW
VOLT NON
VOLT
Connect separate
External voltage of
DC 12 V, 24 V~
jvtt
{ v jvtt
mhu
olh{ jvvs
sv~
tpkksl opno
COMM
Themal Operation COMM
FAN
HEAT COOL
LOW
MIDDLE HIGH
Thermostat
LG does not
supply this section
(Field supply)
Thermostat
LG does not
supply this section
(Field supply)
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper CN_MODE
CN_WIND
CN_INDOOR
DISPLAY_LED
TEMP_SW
SETTING_SW
CN_OUT
CN_PI485
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper CN_MODE
CN_WIND
CN_INDOOR
DISPLAY_LED
TEMP_SW
SETTING_SW
CN_OUT
CN_PI485

Installation manual 1312 Dry contact for thermostat
ENGLISH
Setting and using method
nFunction table for the selection of ‘SETTING_SW’ and the
input signal
Notes
1) Thermal On : This input will change automatically desired temperature
Desired Temperature 18 °C In cooling mode
Desired Temperature 30 °C In heating mode
No function In FAN mode
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper CN_MODE
CN_WIND
SETTING_SW
85
SETTING_SW
COMM
Themal Operation COMM
FAN
HEAT COOL
LOW
MIDDLE HIGH
SETTING
_SW
CN_MODE input Function
FAN HEAT COOL
2,3,6,7,A,B,E,F
0 0 0 NA
0 0 1 COOL
0 1 0 HEAT
0 1 1 NA
1 0 0 FAN
1 0 1 NA
1 1 0 NA
1 1 1 NA
Others - - - NA
SETTING
_SW
CN_WIND input Function
Low Middle High
8,9,A,B,C,D,E,F
0 0 0 NA
0 0 1 High
0 1 0 Middle
0 1 1 NA
1 0 0 Low
1 0 1 NA
1 1 0 NA
1 1 1 NA
Others - - - NA
SETTING
_SW
CN_Ther/Oper input Function
Thermal Operation
4,5,6,7,C,D,E,F
0 0 Thermal Off + Stop
0 1 Thermal Off + Run
1 0 Thermal On + Stop
1 1 Thermal On + Run
Others - - NA
Setting and using method
Use WIND Signal?
Set the switch ‘0 ~ 7’
Use Thermal function?
Use Operation mode?
Switch 0
Set the switch ‘0 ~ 3’
Set the switch ‘0 ~ 1’ Set the switch ‘2 ~ 3’
Switch 1 Switch 2 Switch 3 Switch 4 Switch 5 Switch 6 Switch 7
Set the switch ‘4 ~ 7’
Use Operation mode?
YES
NO
NO
YES
NO
NO YESNO YESNO YESNO
NO
YES YES
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use WIND Signal?
Set the switch ‘8 ~ F’
Use Thermal function?
Use Operation mode?
Switch 8
Set the switch ‘8 ~ B’
Set the switch ‘8 ~ 9’ Set the switch ‘A ~ B’ Set the switch ‘C ~ D’ Set the switch ‘E ~ F’
Switch 9 Switch A Switch B Switch C Switch D Switch E Switch F
Set the switch ‘C ~ F’
Use Operation mode?
YES
YES
NO
YES
NO
NO YESNO YESNO YESNO
NO
YES YES
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Use Dry Contact
Control Priority?
Set the switch ‘4 ~ 5’ Set the switch ‘6 ~ 7’
-. When not using WIND signal
-. When using WIND signal
nFlow Chart for ‘SETTING_SW’
Notes
• When you change a function with remote control without setting Dry_contact control priority the display
condition between remote control and controller can be different.