LG PDRYCB300 User guide

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.01_071619

PORTUGUÊS

ENGLISH

MALTI

SLOVENČINA

ITALIANO ESPAÑOL FRANÇAIS

MAGYAR

БЪЛГАРСКИ

SLOVENŠČINA

LATVIEŠU VALODA

SRPSKI

LIETUVIŲ KALBA

HRVATSKI

DEUTSCH

ΕΛΛΗΝΙΚΆ

SVENSKA

GAEILGE

МАКЕДОНСКИ

ČEŠTINA

NORSK

NEDERLANDS

SUOMI

SHQIP

ÍSLENSKA

POLSKI

DANSK

LIMBA ROMÂNĂ

BOSANSKI

EESTI KEEL

Table of contents

TABLE OF CONTENTS

Important Safety Instructions

Important Safety Instructions

ENGLISH

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)

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.

2 Dry contact for thermostat Installation manual 3

Important Safety Instructions

Important Safety Instructions

• 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

4 Dry contact for thermostat

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.

Installation manual 5

ENGLISH

Important Safety Instructions

Important Safety Instructions

• 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.

ENGLISH

6 Dry contact for thermostat

Installation manual 7

Overview

Part Descripton

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.

h If 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.

h Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
h Qualified service technician is only possible to access to product.

Minimum cross-sectional area of conductors

Rated current of appliance

A

>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

8 Dry contact for thermostat

≤0.2

Nominal cross-sectional area

2

mm

Tinsel cord

a

0.5

0.75

1.0 (0.75)

1.5 (1.0)

2.5
4
6

10

a

b

b

Part Descripton

Front Case Rear Case

ISO View

Side

Cable(1 EA)

Installation Manual

7

2
1

11

5

* Others :

PCB

Side

Screw 4 EA(For installation)

ENGLISH

8
9

10

6

4
3

(For Connecting with indoor unit)

DRY CONTACT FOR THERMOSTAT

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

Installation manual 9

CN_INDOOR

Part Descripton

Setting and using method

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.

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.

Setting and using method

After change any Dry contact setting, then you must press RESET switch to reflect the setting.

Power supply and indoor unit connection

n

When using the Dry contact for communication independently

CN_INDOOR

CN_INDOOR

Indoor unit

PCB

ENGLISH

!

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 manual 1110 Dry contact for thermostat

Setting and using method

Setting and using method

Setting of Contact Signal Input

n For input contact closure only(No power input)

Themal

Operation

COMM

HEAT

COOL

FAN

COMM

Notes

Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage

n For input contact voltage : DC 12 V, AC 24 V

Themal

Operation

COMM

HEAT

COOL

FAN

COMM

Connect separate
External voltage of

DC 12 V, AC 24 V

LOW

LOW

MIDDLE

MIDDLE

HIGH

HIGH

Thermostat

LG does not
supply this section
(Field supply)

Thermostat

LG does not
supply this section
(Field supply)

Setting of ‘OPER_SW’

n Using ‘OPER_SW’ , select the Option of control Function as

described below

OPER_SW

<OPER_SW Function>

No.

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

WIND Signal

0 Disable Disable Disable Disable
1 Disable Disable Disable Enable
2 Disable Disable Enable
3 Disable Disable Enable Enable
4 Disable Enable
5 Disable Enable Disable Enable
6 Disable Enable Enable Disable
7 Disable Enable Enable Enable
8 Enable
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

en/disable

1)

Thermal

en/disable

2)

Oper Mode

en/disable

3)

Dry Contact Control

Priority

Disable

Disable Disable

Disable Disable Disable

4)

ENGLISH

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.

Installation manual 1312 Dry contact for thermostat

COMM

Themal

Operation

COMM

FAN

HEAT

COOL

LOW

MIDDLE

HIGH

OPER_SW

Setting and using method

n Flow Chart for ‘OPER_SW’

-. When not using WIND signal

Use WIND Signal?

NO

Set the switch ‘0 ~ 7’

Use Thermal function?

Set the switch ‘0 ~ 3’

Use Operation mode?

Set the switch ‘0 ~ 1’ Set the switch ‘2 ~ 3’

Use Dry Contact
Control Priority?

NO YESNO YESNO YESNO

Switch 0

-. When using WIND signal

Use WIND Signal?

Set the switch ‘8 ~ F’

Use Thermal function?

Set the switch ‘8 ~ B’

Use Operation mode?

Set the switch ‘8 ~ 9’ Set the switch ‘A ~ B’ Set the switch ‘C ~ D’ Set the switch ‘E ~ F’

Use Dry Contact
Control Priority?

NO YESNO YESNO YESNO

Switch 8

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.

YES

NO

YES

NO

Use Dry Contact

YES

Switch 1 Switch 2 Switch 3 Switch 4 Switch 5 Switch 6 Switch 7

YES

NO

NO

YES

Switch 9 Switch A Switch B Switch C Switch D Switch E Switch F

Control Priority?

YES

YES

Use Dry Contact
Control Priority?

Set the switch ‘4 ~ 7’

Use Operation mode?

Set the switch ‘4 ~ 5’ Set the switch ‘6 ~ 7’

Use Dry Contact
Control Priority?

Set the switch ‘C ~ F’

Use Operation mode?

Use Dry Contact
Control Priority?

YES

NO

YES

NO

Use Dry Contact
Control Priority?

Use Dry Contact
Control Priority?

Setting and using method

n Function table for the selection of ‘OPER_SW’ and the input

signal

OPER_SW

FAN HEAT COOL

2,3,6,7,A,B,E,F

Others - - - NA

OPER_SW

Low Middle High

8,9,A,B,C,D,E,F

Others - - - NA

OPER_SW

4,5,6,7,C,D,E,F

Others - - NA

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

CN_MODE input

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

Function

CN_WIND input Function

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

Thermal Operation

CN_OPER Function

0 0 Thermal Off + Stop
0 1 Thermal Off + Run
1 0 Thermal On + Stop
1 1 Thermal On + Run

Installation manual 1514 Dry contact for thermostat

ENGLISH

Setting and using method

Setting and using method

Setting of ‘TEMP_SW’

n When 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.

Not use Dry Contact

TEMP

module's Desired

(°C)

'TEMP SW'

'TEMP SW'

*. E, F : Reserved

temp function

setting

TEMP

23 24 25 26 27 28 29 30

(°C)

6789ABCD

setting

18 19 20 21 22

12345

0

Installation of thermostat

n When 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

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.

0

Conventional AC Unit Thermostat

1 Enable

2

3 Enable

4

5 Enable

Heat Pump Thermostat_O

Terminal

Heat Pump Thermostat_B

Terminal

Disable

Disable

Disable

ENGLISH

Installation manual 1716 Dry contact for thermostat

Thermostat

LG does not supply this section
(Field supply)

LOW

MIDDLE

HIGH

L

L
N

LL

Operation

FAN

HEAT

COOL

COMM

C

AC 24 V

RGWY

Setting and using method

n Details 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.

L

AC 24 V

N

C

R

Security

Emergency Stop

n For conventional thermostat signal input

Setting and using method

ENGLISH

Occupancy Sensor

Reference Cases

Thermostat Fan & System Switch Input

FAN

[Auto / On]

- - - 0 - - - Disable Operation

Auto

ON

MODE

[Cool / Heat / Off]

OFF - 1 0 0 0 Off

Cool

Heat

FAN - 1 1 0 0 Fan/ Off/ On

Cool

Heat

Operation

RT > SP 1 1 0 1 Cool / On / On
RT < SP 1 0 0 0 Enable
RT < SP 1 1 1 0 Heat/ On/On
RT > SP 1 0 0 0 Off

RT > SP 1 1 0 1 Cool/ On/ On
RT < SP 1 1 0 0 Fan/ Off/ On
RT < SP 1 1 1 0 Heat/ On/ On
RT > SP 1 1 0 0 Fan/ Off/ On

FAN

[G]

HEAT

[W]

COOL

[Y]

IDU Response

[Mode / Thermal / Fan]

※ RT : Room Temperature
※ SP : Set Point

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.

Installation manual 1918 Dry contact for thermostat

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

n For heat pump thermostat with O terminal signal input

Setting and using method

n For heat pump thermostat with B terminal signal input

Thermostat

AC 24 V

L

N

COMM

C

RYGB

Operation

Thermal

LG does not supply this section
(Field supply)

LLL

MIDDLE

HIGH

LOW

FAN

HEAT

ENGLISH

Thermostat Fan & System Switch Input

FAN

[Auto / On]

- - - 0 - - - Disable Operation

Auto

ON

MODE

[Cool / Heat / Off]

OFF-1000 Off

RT > SP1101 Cool / On / On

Cool

RT < SP1001 Off
RT < SP1100 Heat/ On/On

Heat

RT > SP1000 Off

FAN-1010 Fan/ Off/ On

RT > SP1111 Cool/ On/ On

Cool

RT < SP1011 Fan/ Off/ On
RT < SP1110 Heat/ On/ On

Heat

RT > SP1010 Fan/ Off/ On

Operation

Thermal

FAN

[Y]

COOL

[G]

[O]

IDU Response

[Mode / Thermal / Fan]

※ RT : Room Temperature
※ SP : Set Point

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.

Thermostat Fan & System Switch Input

FAN

[Auto / On]

- - - 0 - - - Disable Operation

Auto

ON

MODE

[Cool / Heat / Off]

OFF - 1 0 0 0 Off

RT > SP 1 1 0 0 Cool / On / On

Cool

RT < SP 1 0 0 0 Off
RT < SP 1 1 0 1 Heat/ On/On

Heat

RT > SP 1 0 0 1 Off

OFF - 1 0 1 0 Fan/ Off/ On

RT > SP 1 1 1 0 Cool/ On/ On

Cool

RT < SP 1 0 1 0 Fan/ Off/ On
RT < SP 1 1 1 1 Heat/ On/ On

Heat

RT > SP 1 0 1 1 Fan/ Off/ On

Operation

Thermal

[Y]

FAN

[G]

HEAT

[B]

IDU Response

[Mode / Thermal / Fan]

※ RT : Room Temperature
※ SP : Set Point

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.

Installation manual 2120 Dry contact for thermostat

Setting and using method

Setting and using method

Indoor unit monitoring

n Monitoring whether the indoor unit is operating: Refer to

below and connect to the control device that you want to
control.

Field Supply

Operation Display

(Depends on Operation display power type)

n Monitoring indoor unit error: Refer to below and connect to

the control device that you want to control.

Field Supply

Error Display

(Depends on Error display power type)

!

CAUTION

Field supply power should not use more than DC 12 V (0.5 A), AC 24 V (0.5 A).

Power

AC or DC

Power

AC or DC

Function table for the input signal (For AWHP Indoor unit)

ENGLISH

No power input DC 12 V, AC 24 V

Thermostat

Themal

Operation

COMM

HEAT

COOL

Themal

Operation

COMM

AUTO

DHW

NIGHT SILENT

COMM

CN_OPER CN_MODE

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

EMERGENCY MODE

Connect separate
External voltage of
DC 12 V, AC 24 V

Notes

Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage

COMM

AUTO

LG does not

HEAT

COOL

DHW

NIGHT SILENT

EMERGENCY MODE

supply this section
(Field supply)

Function

※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.

CN_WIND Function

DHW

NIGHT SILENT

EMERGENCY MODE

※If both Operation input and DHW input were 0(Stop, Off), Night silent input and Emergency mode input

don't work.

On
Off
On
Off
On
Off

Installation manual 2322 Dry contact for thermostat

LG Electronics Inc.
EU Representative : LG Electronics European Shared Service Center B.V.

Manufacturer: LG Electronics Inc. Changwon 2nd factory, 84, Wanam-ro,

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA