LG PRVC2 INSTALLATION INSTRUCTIONS

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INSTALLATION MANUAL

LOW AMBIENT CONTROL KIT

(For Multi V 5)

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.

PRVC2

Original instruction

www.lg.com

MFL42540252

Rev.01_010919

Copyright © 2017 - 2020 LG Electronics Inc. All Rights Reserved.

Table of contents

TABLE OF CONTENTS

3 SAFETY PRECAUTIONS

5 ACCESSORY PARTS

6NAME OF EACH PART

7INSTALLATION METHOD

7IO Module Installation Method

10 Transformer, Terminal Block Installation Method

13 SETTING AND USING METHOD

13 Power source input

15IO Module - Low Ambient Kit Function

16IO Module - Other Function

19 Wiring for Damper Actuator

22Setting of Outdoor Unit DIP Switch

23INSTALLATION METHOD OF SNOW HOOD

AND AIR DAMPER

23One Unit with Snow Hood and Air Damper

24Two and Three Units with Snow Hood and Air Damper

25Unit Placement and Clearances

2 Low Ambient Control Kit

Safety Precautions

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

νIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

!	WARNING	This symbol indicates the possibility of death or serious injury.
!	CAUTION	This symbol indicates the possibility of injury or damage.

ν Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

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! WARNING

Installation

•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.

•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.

Installation manual 3

Safety Precautions

•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.

Operation

•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.

•Do notspill 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.

4 Low Ambient Control Kit

Accessory Parts

Accessory Parts

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Terminal Block (2 EA)

IO Module

Bracket 2

Bracket 1

Bracket 3

Bracket 4

Manual

Screw (11 EA)

Cable (3 EA)						Tie (2 EA)

Clamp

Transformer

Installation manual 5

Name of each Part

Name of each Part

Main connector : Power input and communication connector with Outdoor unit

SW102 : Switch for setting internal function

SW104 : Rotary Switch for setting Demand control step

Digital Output : Operating & Error status Relay output (250 V, 1 A) Reserved Relay output (250 V, 1 A)

Digital Input : Dry contact input

Analog Input : DC 0 ~ 10 V Analog signal input

Analog Output : DC 0 ~ 10 V Analog signal output

SW103 : Reset Switch

SW101 : DIP Switch for setting operating function

6 Low Ambient Control Kit

Installation Method

Installation Method

IO Module Installation Method

Separate front panel from outdoor unit.Separate front cover of control box.Assemble IO Module and Bracket3.

Connect the connection wires according to the instructions. (Please refer to Setting and Using Method)

UXB

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+

Main board connector

! CAUTION

Be sure to turn off outdoor unit power before installation.

Installation manual 7

Installation Method

UXA

Main board connector

! CAUTION

Be sure to turn off outdoor unit power before installation.

8 Low Ambient Control Kit

Installation Method

Fix and fasten components and cables.

Perform the switch setting according to the instructions.

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Installation manual 9

Installation Method

Transformer, Terminal Block Installation Method

UXB

Shut off the main power of outdoor unit.

Install the IO Module in the C/Box by using screws.Install the Bracket2 in the C/Box by using screws.

Install the transformer on the Bracket2 by using screws.Install the terminal block on the Bracket2 by using screws.

Connect the Main PCB(CN10) to IO Module(CN101) by using the cable assembly.

Connect the blue cable of transformer to the Main PCB(JIG_N), brown cable of transformer to the Main PCB(JIG_L).

Connect the red cable of transformer to the terminal block (2Pin Yellow terminal block).Connect a power cable(DC 12 V) to CN101(12 V,GND) of IO Module.

Connect the black cable of Damper Actuator to the terminal block and connect the cable of IO Module(CN1_A0(GND(A-)) to the black cable of Damper Actuator.

Connect the red cable of Damper Actuator to CN1_A0(A0_1(A+)) of IO Module.

Set up the main function DIP S/W of IO Module. (SW101 : L1,L2=On and L3,L4=Off / SW102 : L1,L2=Off)

Set up the DIP S/W of Main Outdoor unit PCB. (Refer to page 21 for details)Turn on the main power of outdoor unit.

Check the signal to CN1_A0(AO_01,GND) of IO Module and Air Damper.

10 Low Ambient Control Kit

Installation Method

UXA

Shut off the main power of outdoor unit.

Install the IO Module in the C/Box by using screws.Install the Bracket2 in the C/Box by using screws.

Install the transformer on the Bracket2 by using screws.Install the terminal block on the Bracket2 by using screws.

Connect the Main PCB(CN10) to IO Module(CN101) by using the cable assembly.

Connect the blue cable of transformer to the Main PCB(JIG_N), brown cable of transformer to the Main PCB(JIG_L).

Connect the red cable of transformer to the terminal block (2Pin Yellow terminal block).Connect a power cable(DC 12 V) to CN101(12 V,GND) of IO Module.

Connect the black cable of Damper Actuator to the terminal block and connect the cable of IO Module(CN1_A0(GND(A-)) to the black cable of Damper Actuator.

Connect the red cable of Damper Actuator to CN1_A0(A0_1(A+)) of IO Module.

Set up the main function DIP S/W of IO Module. (SW101 : L1,L2=On and L3,L4=Off / SW102 : L1,L2=Off)

Set up the DIP S/W of Main Outdoor unit PCB. (Refer to page 21 for details)Turn on the main power of outdoor unit.

Check the signal to CN1_A0(AO_01,GND) of IO Module and Air Damper.

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Installation manual 11

Installation Method

Using the Clamp and Tie, fasten the Damper Actuator output cable and Trans output cable as below.

Actuator Wire

12 Low Ambient Control Kit

Setting and Using Method

Power source input

Setting and Using Method

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LG does not supply this section (Field supply)

Power	Error Status
AC or DC
Power	Operating Status
AC or DC

Status output Relay can endure 250 VAC, 1 A.

AO_4 GND AO_3 GND

AO_4

AO_3

AO_2 GND AO_1 GND

AO_2

AO_1

Power	Reserved
AC or DC
Power	Reserved
AC or DC

Reserved

AI_1

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AI : Analog Input (DC 0~10 V)

AO : Analog Output ( DC 0~10 V, Max 20 mA)

Input_LNO : Low Noise Operation

Dry contact input part

Connect Non Voltage contact signal for demand control (3 step) * Priority setting

Using ‘Priority setting’ contact signal, set the priority of command. (External command from DDC Vs Command from LG central controller.)

-Close : Central controller has priority to external signal.

-Open : External signal has priority to central controller.

Analog input part

Connect Analog input signal for demand control (10 step)

Analog output part

Connect Analog output signal for controlling third party devices.

Ex) Valve actuator for variable water flow. Damper actuator for Low Ambient Kit

Digital output part

Connect status display devices.

!CAUTION

Power must be turned on after the product is wired completely.

Installation manual 13

Setting and Using Method

ν Communication and Power Line

-If communication and power lines are run alongside each other then there is a strong likelihood of operational faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling. The tables below indicates our recommendation as to appropriate spacing of communication and power lines where these are to be run side by side.

	Current capacity of power line		Spacing
		10 A	11-13/16 in (300 mm)
	100 V or more	50 A	19-11/16 in (500 mm)
		100 A	39-3/8 in (1 000 mm)
		Exceed 100 A	59-3/64 in (1 500 mm)

Notes

If the power supply waveform continues to exhibit some distortion the recommended spacing in the table should be increased.

•If the lines are laid inside conduits then the following point must also be taken into account when grouping various lines together for introduction into the conduits.

•Power lines (including power supply to air conditioner) and signal lines must not be laid inside the same.

•In the same way, when grouping the lines power and signal lines should not be bunched together.

14 Low Ambient Control Kit

Setting and Using Method

IO Module - Low Ambient Kit Function

Setting of DIP Switch

Using ‘SW101’, ‘SW102’, You can use Low Ambient Kit Mode

SW102

ON	ON	4
		3
	2	2
L1		L1

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Notes

Default status is all off.

Set Low Ambient Kit Operation

Position	Setting of DIP Switch

	ON				SW101 - L1=ON
					L2=ON
	L1	2	3	4	L3=OFF
					L4=OFF

	ON			SW102 - L1=OFF
				L2=OFF
	L1		2

!CAUTION

•If the DIP SW is set , IO module System is operating preferentially than outdoor unit setting.

•After change DIP SW setting, press reset switch to reflect the setting.

Installation manual 15

Setting and Using Method

IO Module - Other Function

Setting of DIP Switch

Using ‘SW101’, select the option of control function as described below.

ON	4
	3
	2
	L1

Notes

Default status is all off.

•L3 : Set Low Noise Operation

This is a function driving outdoor unit fan RPM to operate low speed for reducing fan noise according to the input signal. To use this function, you should set Outdoor unit mode, Please refer to PDB more detail.

Position	Function

ON				ON : Enable Low Noise Operation
L1	2	3	4	OFF : Disable Low Noise Operation

! CAUTION

If the DIP SW is set , IO module System is operating preferentially than outdoor unit setting.

• L4 : Set Operating status output

Position	Function

ON				ON : Activate Digital Output according to Indoor Unit status
L1	2	3	4	OFF : Activate Digital Output according to Outdoor Unit status

! CAUTION

After change DIP SW setting, press reset switch to reflect the setting.

16 Low Ambient Control Kit

Using ‘SW102’, set the internal function as described below.

ON

2 L1

Setting and Using Method

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Notes

Default status is all off.

• L1 : Set Analog output default value when Communication Error will be occur (Module – ODU)

Position					Function
ON					ON : Analog output 0 V
					OFF : Analog output 10 V
L1			2

•L2 : Set Analog output Range

Basically this module keeps a minimum Analog output voltage refer to L1,L2 setting of SW101 to prevent unexpected accident. When you need to use 0~10V full range, L2 should be set as ON.

Position					Function
ON					ON : Ignore minimum Analog output value setting
					(L1,L2 setting value of 4pin DIP SW)
					OFF : Follow minimum Analog output value setting
L1			2
					(L1,L2 setting value of 4pin DIP SW)

! CAUTION

After change DIP SW setting, press reset switch to reflect the setting.

Installation manual 17

Setting and Using Method

Setting of Rotary Switch

Use the Rotary Switch to set a control step for contact signal input : The type of input signal and control step can be set using ‘SW104’

This function is for demand control to reduce power consumption. Set the control mode what you want according to the table as below.

- Type of input signal

SW_STEP	Input signal
0, 1, 2, 3, 4, 5, 6, 7	Contact signal input
C, D, E	Analog input signal

! CAUTION

Do not change a command too quickly.

Keep the command 30 seconds at least, otherwise it will cause a damage to outdoor unit.

•Operation rate condition :

-Cooling : Outdoor 35 °C, Indoor 27 °C

-Heating : Outdoor 7 °C, Indoor 20 °C

•The tolerance of the operation rate can be cause by combination of outdoor unit, operating condition, installation circumstance.

•When operation rate is 100 %, Target Evaporating Temp. and Target Condensing Temp. can be changed by installation option. (Refer to product data book)

•Input_1 : 0 Έ OFF, Input_1 : 1 Έ ON

18 Low Ambient Control Kit