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LG LV420HV - User Manual

LG LV420HV
74 pages
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SINGLE ZONE
VERTICAL AIR HANDLING UNIT
INSTALLATION MANUAL
Single-Zone Vertical Air
Handling Unit System
18,000 - 48,000 Btu/h
LV420HV (42,000 Btu/h)
LV480HV (48,000 Btu/h)
LV181HV4 (18,000 Btu/h)
LV241HV4 (24,000 Btu/h)
LV361HV4 (36,000 Btu/h)

Table of Contents

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Summary

Safety Instructions

Installation Safety

Provides critical safety precautions and warnings for the installation process.

General Data

Specifications

Details technical specifications for various LG Vertical Air Handling Units.

General Installation Guidelines

Location Selection

Guidelines for choosing an optimal and safe installation location for units.

Required Outdoor Unit Clearances

Specifies minimum clearance requirements for safe operation and airflow around outdoor units.

Rigging and Lifting Instructions

Safety guidelines and procedures for safely rigging and lifting equipment.

Indoor Unit Clearances

Guidelines for selecting proper installation locations and clearances for indoor units.

Installing Ductwork

Guidelines and best practices for installing ductwork for the VAHU.

Refrigerant Safety Standards; Device Connection Limitations

Connection Limitations

Details on refrigerant piping length and elevation limitations for single zone systems.

Copper Expansion and Contraction

Copper Expansion and Contraction

Explains pipe expansion/contraction and calculation methods for system design.

Flaring and Brazing Procedures

Flaring and Brazing Procedures

Detailed instructions for performing flared and brazed refrigerant connections.

Insulation

Electrical System Installation

General Information and Safety Guidelines

Provides essential safety information and guidelines for electrical system installation.

Power Wiring Specifications and Best Practices

Best practices for power wiring and terminal connections.

Indoor Unit Electrical Connections

Step-by-step guide for connecting electrical wiring to the indoor unit.

Outdoor Unit Electrical Connections

Procedure for connecting electrical wiring to the outdoor unit.

Final Installation Procedures

Triple Leak; Pressure Check

Procedure for performing a triple leak and pressure test on the refrigerant piping.

Triple Leak; Pressure and Evacuation Procedures

Steps for leak testing and performing triple evacuation of the system.

Refrigerant Trim Charge

Instructions for adding additional refrigerant charge based on piping length.

Test Run

Guidelines for performing a test run of the installed system.

Pump Down, Cooling Only Mode

Procedure for pump down and setting the unit to cooling-only mode.

Troubleshooting

LG SIMS - Self Diagnosis Functions

Overview of LG SIMS for monitoring and troubleshooting via smartphone app.

Error Codes

Explanation of error codes and how they are displayed on indoor unit LEDs.

Single Zone Outdoor Unit Error Codes

List of error codes specific to LG Single Zone outdoor units.

Cautions for Refrigerant Leaks

LG LV420HV Specifications

General IconGeneral
BrandLG
ModelLV420HV
CategoryAir Handlers
LanguageEnglish

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