LG ARNU073L1G4 User Manual

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.
Ceilling Concealed Duct
INSTALLATION MANUAL
AIR
CONDITIONER
P/NO : MFL65003103
Rev.00_020718
http://www.lghvac.com
www.lg.com
Copyright © 2015 - 2018 LG Electronics Inc. All Rights Reserved.
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LG ARNU073L1G4 Specifications

General

Brand	LG
Model	ARNU073L1G4
Category	Air Conditioner
Language	English

Summary

Important Safety Information

General Safety Warnings and Cautions

Covers warnings, cautions, and general safety advice for users and installers.

Installation and Servicing Safety

Details safety protocols for installation, wiring, transport, tubing, and servicing.

Safety Precautions Overview

Warning Symbols and Meanings

Explains the meaning of warning symbols used throughout the manual.

Installation Hazard Avoidance

Lists critical safety measures to prevent hazards during installation.

Operational Safety Guidelines

Safe Operation Practices

Outlines best practices for operating the air conditioner safely.

Hazard Response During Operation

Provides guidance on how to react to specific hazards during operation.

Specific Installation Cautions

Refrigerant and Drain Piping Safety

Specific Operation Cautions

User Interaction and Maintenance Safety

Site Selection for Indoor Unit

Ideal Location Criteria

Installation Cases and Location Restrictions

Prohibited Installation Environments

Lists specific environments where installation is not recommended.

Indoor Unit Mounting and Wiring

Securing the Indoor Unit

Electrical Connections and Cable Management

Guides on wiring connections and proper cable clamping.

Electrical Connections and Drainage Verification

Connecting Cable Assembly Examples

Checking the Drainage System

Wiring Precautions and Specifications

Cable Requirements and Maintenance

Power and Ground Wiring Best Practices

Outlines best practices for safe and effective power and ground wiring.

Refrigerant Piping Procedures

Key Piping Principles (Drying, Cleanliness, Airtightness)

Explains the three core principles for refrigerant piping.

Welding and Nitrogen Purging

Nitrogen Substitution Method for Welding

Welding Safety and Precautions

Lists essential safety precautions for welding operations.

Insulation and Final Checks

Thermal Insulation for Piping and Joints

Post-Installation Operational Checks

Lists checks to perform after installation to ensure proper operation.

Drain Piping Installation

Unit Declination and Drain Hose Laying

Explains unit declination and proper laying of drain hoses.

Drain Gradient and U-Trap Requirements

Dip Switch Settings

Indoor Unit DIP Switch Configuration