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LG ARND DCR4 Series - User Manual

LG ARND DCR4 Series
88 pages
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Variable Refrigerant Flow Split Compact DOAS
ARND***DCR4 Series
(900, 1,500 and 2,000 CFM)
LG SPLIT COMPACT DEDICATED
OUTDOOR AIR SYSTEM (DOAS)
INSTALLATION MANUAL

Table of Contents

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Summary

Safety Precautions

INSTALLATION Safety

Safety guidelines and warnings for unit installation procedures.

WIRING Safety

Electrical safety precautions and warnings related to wiring the system.

OPERATION Safety

Safety guidelines and warnings for operating the unit correctly.

Unit Nomenclature

Product Overview

Interior Components

Description of the unit's internal parts and their functions.

Electrical Components

Identification and description of the unit's electrical components.

General Data

Specifications

Technical specifications for the Split Compact DOAS unit.

Electrical Data

Electrical data and ratings for the DOAS unit models.

External Dimensions

Physical dimensions for the ARND093DCR4 model.

Wiring Diagrams

Wiring diagrams for various DOAS unit models.

Refrigerant Flow

Diagrams and details of refrigerant flow for cooling, dehumidification, and heating.

Sound Power Levels

Sound power level data for different operating conditions and models.

INSTALLATION

Receiving and Inspection

Procedure for receiving and inspecting the unit upon delivery.

Handling and Storage

Guidelines for handling, storing, and removing the unit.

Assemblies and Airflow

Description of unit assemblies and airflow arrangement modes.

Location Selection and Roughing In

Guidelines for selecting an installation location and initial rough-in.

Mounting Dimensions and Ductwork

Dimensions for mounting and configuration of ductwork.

Service Clearances and Piping

Required clearances for service and details for piping connections.

Field-Installed Outdoor Air Filter

Guidance on installing a field-supplied outdoor air filter.

UNIT PIPING

Refrigerant Safety and Handling

Safety guidelines for refrigerant and best practices for handling piping.

Brazing, Support, and Insulation

Procedures for brazing, supporting, and insulating refrigerant pipes.

Condensate Drain and Pump

Connections and information for condensate drains and pumps.

Gravity Drain and Pipe Installation

Connecting gravity drains and installing condensate drain pipes.

Refrigerant Piping and System Engineering

Guidelines for R410A piping installation and system design rules.

Piping Layout and Conditional Applications

Sample piping layouts and conditions for pipe upsizing.

ELECTRICAL INFORMATION

General and Separation Guidelines

General electrical safety and rules for separating wiring types.

Wiring Connections and Terminals

Best practices for power/communication wiring and terminal connections.

Power Supply and Wiring Specifications

Specifications for power supply and wiring requirements.

Communication Cable Specifications

Specifications for communication cables between units.

Connection Procedure

Step-by-step guide for connecting electrical wiring.

Field Wiring Diagrams

Diagrams and instructions for field wiring.

Field-Mounted Sensors

Overview and installation of field-mounted sensors.

LEAK; PRESSURE CHECK AND EVACUATION

Leak; Pressure Check

Procedure for leak and pressure testing the refrigerant system.

Ambient Conditions and Testing

How ambient conditions affect leak/pressure test results.

Evacuation Procedure

Procedure for evacuating the refrigerant system to remove moisture and air.

CHARGING REFRIGERANT

Refrigerant Charge Worksheet

Worksheet for calculating and recording refrigerant charge.

STARTUP CONFIGURATION

Checks Before Initial Startup

Pre-startup checklist to ensure proper installation and configuration.

ELECTRIC PREHEATER ACCESSORY

Safety Precautions

General safety precautions for the electric preheater accessory.

Installation Procedures

Safety guidelines specific to the accessory's installation.

Wiring Precautions

Electrical safety precautions for wiring the accessory.

Operation Precautions

Safety guidelines for operating the electric preheater accessory.

Overview, Structure, and Control Box

General overview, structural components, and control box details.

General Data and Specifications

General data, models, specifications, and temperature limits.

Dimensions

Physical dimensions for the electric preheater models.

Wiring Diagrams

Wiring diagrams illustrating interlock and internal wiring.

Installation Steps

Step-by-step instructions for installing the electric preheater.

Sequence Setting

Configuration settings for preheater operation and control.

CONTROLLER

Overview and Specifications

Description of the DOAS controller and its electrical specifications.

Connecting to the Web UI

Instructions for accessing the controller via a web browser.

Service Password and Startup Settings

Setting service passwords and initial startup configurations.

IP Address and Unit Addressing

Information on controller IP address and DOAS unit address settings.

Central Controller Setting

Settings for connecting to central control systems (AC Smart/ACP).

AC Smart; ACP Controller Setup

Steps for setting up AC Smart and ACP controllers for communication.

BMS Configuration

Guidelines for configuring BMS connectivity (BACnet IP and MODBUS).

Control Board Terminal Connections

Details on terminal connections for main and CAREL control boards.

LG Control Board Layout

Layout and component details of the LG main control board.

UI Module

Description and terminal connections of the UI module.

NTC Module

Description and terminal connections of the NTC module.

EEV Module

Description and terminal connections of the EEV module.

Navigation and Status Screens

Guide to navigating controller menus and understanding status screens.

Software Update

Procedure for updating the controller software via USB.

BACnet; Modbus Object List

Comprehensive list of BACnet and Modbus objects for DOAS units.

INSTALLATION CHECKLIST

Rough-In, Ductwork, Piping, and Condensate

Checklist items for rough-in, ductwork, refrigerant piping, and condensate systems.

Insulation, Electrical, Control Panel, and Damper

Checklist items for insulation, electrical, control panel, and dampers.

LG ARND DCR4 Series Specifications

General IconGeneral
BrandLG
ModelARND DCR4 Series
CategoryChiller
LanguageEnglish

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