LG PRDCA0 INSTALLATION INSTRUCTIONS

P/NO : MFL50024804

www.lg.com

INSTALLATION MANUAL

AHU COMMUNICATION KIT

• 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.

MODEL : PRDCA0

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• Do not cool excessively indoors. This may be harmful for your health and may consume more electricity.

• Block sunlight with blinds or curtains while you are operating the equipment.

• Keep doors or windows closed tightly while you are operating the equipment.

• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the air flow or weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes. Write the model number and the serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your equipment more efficiently by referring to the instructions below:

TIPS FOR SAVING ENERGY

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IMPORTANT SAFETY INSTRUCTIONS

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 MUST conform with local building codes or, in the absence of local codes.

• 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.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

Installation

• Always perform grounding.

- Otherwise, it may cause electrical shock.

• Don’t use a power cord, a plug or a loose socket that is damaged.

- Otherwise, it may cause fire or electrical shock.

• For installation of the product, always contact the service center or a professional installation agency.

- Otherwise, it may cause fire, electrical shock, explosion or injury.

• Securely attach the electrical part cover to AHU Comm. Kit.

- If the electric part cover of AHU Comm. Kit is not attached securely, it could result in a fire or

electric shock due to dust, water, etc.

• Always install an air leakage breaker and a dedicated switching board.

- No installation may cause a fire and electrical shock.

• Do not keep or use flammable gases or combustibles near the equipment.

- Otherwise, it may cause a fire or the failure of product.

• Do not install, remove or reinstall the unit by yourself.

- Otherwise, it may cause a fire, electrical shock, explosion or injury.

• Do not disassemble or repair the product randomly.

- It will cause a fire or electrical shock.

• Do not install the product in a place where there is the concern of falling down.

- Otherwise, it may result in personal injury.

• Use caution when unpacking and installing.

- Sharp edges may cause injury.

IMPORTANT SAFETY INSTRUCTIONS

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Operation

• Do not share the outlet with other appliances.

- It will cause an electric shock or a fire due to heat generation.

• Do not use the damaged power cord.

- Otherwise, it may cause a fire or electrical shock.

• Do not modify or extend the power cord randomly.

- Otherwise, it may cause a fire or electrical shock.

• Take care so that the power cord may not be pulled during operation.

- Otherwise, it may cause a fire or electrical shock.

• Unplug the unit if strange sounds, smell, or smoke comes from it.

- Otherwise, it may cause electrical shock or a fire.

• Keep flames away.

- Otherwise, may occur a fire.

• Take the power plug out if necessary, holding the head of the plug and do not touch it with wet hands.

- Otherwise, it may cause a fire or electrical shock.

• Do not use the power cord near the heating tools.

- Otherwise, it may cause a fire and electrical shock.

• Do not allow water to run into electrical parts.

- Otherwise, it may cause the failure of machine or electrical shock.

• Hold the plug by the head when taking it out.

- It may cause electric shock and damage.

• Be cautious that water could not enter the product.

- Otherwise, it may cause a fire electrical shock or product damage.

• Do not step on the indoor/outdoor unit and do not put anything on it.

- It may cause an injury through dropping of the unit or falling down.

• Do not place a heavy object on the power cord.

- Otherwise, it may cause a fire or electrical shock.

• When the product is submerged into water, always contact the service center.

- Otherwise, it may cause a fire or electrical shock.

IMPORTANT SAFETY INSTRUCTIONS

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2 TIPS FOR SAVING

ENERGY

3 IMPORTANT SAFETY

INSTRUCTIONS

6 INSTALLATION SCENE

7 SUPPLIES

8 OPTIONAL ACCES-

SORIES

9 PART DESCRIPTION

9 Communication Kit (PRDCA0)

10 BEFORE INSTALLATION

13 COMMUNICATION KIT

INSTALLATION

13 Mechanical installation

14 Electric Wiring Work

15 Electric Wiring Work

16 Electrical Work

17 Electric Wiring Work

18 Controller Setting Method

23 AHU KIT WIRING CON-

FIGURATION WITH DDC

23 Conﬁguration concept

24 DI Wring concept

25 DO Wring concept

26 AI Wring concept

28 FAN Signal Wiring Concept

29 THERMISTORS INSTAL-

LATION

29 Pipe thermistors Installation

32 TROUBLESHOOTING

TABLE OF CONTENTS

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INSTALLATION SCENE

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Parts and components

No. Name Remarks

1 Air Handling Unit Field supply 2 Outdoor Unit Multi V 3 AHU Communication Kit(PRDCA0) 4 AHU EEV Kit(PRLK048A0/PRLK096A0) 5 Field piping Field supply

Wiring connections

6 Communication Kit Wiring

Power supply and communication

between comm. kit and outdoor unit

Pipe thermistors

(EBG61287703/EBG61287704)

Evaporator (In/Out) control of Air Han-

dling Unit

8 Room thermistor (EBG61106821) Return air control

Remote controller(PQRCVSL0

/ PQRCVSL0QW)

Optional accessory

CAUTION

For Installation of Room thermistor (No. 8), always place it at the inlet of Heat Exchanger. Otherwise, it might not operate properly.

INSTALLATION SCENE

Signal Pipe Thermistor Air ﬂow

Refrigerant ﬂow (Cooling)

Refrigerant ﬂow (Heating)

SUPPLIES

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PRDCA0

Compo-

nents

AHU Comm.

Kit

Room

thermistor

Pipe

thermistors

Installation

Manual

Bracket Option PCB

P/NO

AJT73857401 EBG61106821

EBG61287703(In)

EBG61287704(Out)

MFL50024804 MAZ49398901

EBR52358907

~17

Shape

Quanti-

ty(EA)

1 1 2(Each 1) 1 4 11(Each 1)

Model

Name

Weight (kg) Dimension (mm)

POWER

NET Gross

W H D W H D

PRDCA0 6.0 8.0 330 180 430 420 232 540

220-240 V~ 50 Hz

220 V~ 60 Hz

208/230 V~ 60 Hz

SUPPLIES

OPTIONAL ACCESSORIES

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* For further details of the accessories, refer to the manual provided at the time of purchasing

the accessories.

Accessories

Components Remote controller

Model name PQRCVSL0 / PQRCVSL0QW

Shape

OPTIONAL ACCESSORIES

PART DESCRIPTION

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Communication Kit (PRDCA0)

No. m Part Name Quantity (EA)

1 Plastic (+) Bolt 6 2 Cover 1 3 Expansion I/O PCB 1 4 Supporter (Connect No. 3) 6 5 Main PCB case 1 6 Main PCB 1 7 Option PCB (192 kBtu/hr) 1 8 Bracket (For Adaptor) 1

9 AC/DC Convertor 1 10 Supporter (Fixing Wiring) 7 11 Terminal Block (Communication) 1 12 Terminal Block (POWER Supply) 1 13 Clamp Cord (For Power Wiring) 1 14 Clamp Cord 5 15 Panel 1 16 Control Box Case 1 17 Cable gland 6 18 Bracket (For Expansion I/O PCB) 1

PART DESCRIPTION

BEFORE INSTALLATION

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CAUTION

• Don't install or operate the unit in rooms mentioned below.

① Where mineral oil, like cutting oil is present. ② Where the air contains high levels of salt such as air near the ocean. ③ Where sulphurous gas is present such as that in areas of hot spring. ④ In vehicles or vessels.

⑤ Where voltage fluctuates a lot such as that in factories. ⑥ Where high concentration of vapor spray are present. ⑦ Where machines generating electromagnetic waves are present. ⑧ Where acidic or alkaline vapor is present. ⑨ The option boxes must be installed with entrances downward.

• Check the mentioned below, when you apply the AHU (Field supply). ① If the AHU (Field supply) provided in the field is exclusively for heating, you must not

change the operating mode to cooling on the remote controller. If not, it can cause electric shock, injury or death. If you want to operate in cooling mode, AHU (Field supply) must comply with the following details. (Following)

- The insulation level of AHU (Field supply) motor must be ‘F’ or above, and the protection level must satisfy ‘IP 54’.

- AHU (Field supply) must have the drain pan installed.

② Fan speed button on the wired remote controller (PQRCVSL0 /PQRCVSL0QW) is not

operated.

③ For refrigerant piping of outdoor unit, refer to the installation manual supplied with the

outdoor unit.

④ For installation of the wired remote controller (PQRCVSL0 /PQRCVSL0QW), refer to

the manual supplied with the wired remote controller.

⑤ For protecting the refrigerant cycle in heating, the inlet Air temperature to the Heat

Exchanger has to be over 5°C.

⑥ The EEV or TXV kit has to be installed on the AHU as close as possible to the Heat

Exchanger.

• AHU Communication Kit ① Thermistor cable and remote controller wire should be located at least 50mm away

from power supply wires and from wires to the controller. Not following this guideline may result in malfunction due to electrical noise.

② Use only specified wires, and tightly connect wires to the terminals. Keep wiring in

neat order so that it does not obstruct other equipment. Incomplete connections could result in overheating, and in worse case electric shock or fire.

BEFORE INSTALLATION

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CAUTION

Selection of Evaporator(Air Handling Unit) See table below for applicable units

Selecting the capacity setting 'Option PCB'(Accessory) according to the capacity mentioned below.

- The corresponding capacity setting 'Option PCB' needs to be selected depending on the need capacity.

- After checking the need capacity, remove the 192 k Option PCB equipped in the main PCB, and set up the Option PCB fitted the need capacity in the main PCB.

* Evaporator Saturated Temperature(SST) = 6 °C, SH (Superheat) 5K, Air Temperature =

27 °C DBT / 19 °C WBT

* Heat exchanger volume [m

] : Pipe cross-section × Tube length

-. Pipe cross-section [m

] = π × ID2/4

-. Tube length [m] = Tube length of 1 pipe × Tube step × Tube row

Option PCB

P/NO

Capacity

(Btu/h)

Standard heat

exchanger volume

(10-3× m3)

Maximum heat

exchanger capacity

(kW)

Air Flow rate

(CMM)

EBR52358907 28 k 2.7 8.6 22~26

EBR52358908 36 k 3.1 11 25~32

EBR52358909 42 k 3.4 13.8 31~35

EBR52358910 48 k 4.0 15.4 33~45

EBR52358911 76 k 5.4 22.2 50~64

EBR52358912 96 k 6.3 28.1 64~72

EBR52358914 115 k 7.3 33.7 72~88

EBR52358915 134 k 8.5 39.3 88~103

EBR52358916 153 k 9.5 45.4 103~116

EBR52358917 172 k 10.5 50.4 114~129

EBR52358913 192 k 11.2 56.2 121~137

Detail

Capacity setting 'Option PCB'

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