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LG LMU300HHV User Manual

LG LMU300HHV
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MULTI
F
MAX
MULTI
F
HEAT PUMP OUTDOOR UNIT
INSTALLATION MANUAL
Multi-Zone Heat Pump Systems
1.5 to 3.5 Tons
WITH
Dual-, Tri-, and Quad-Zone
Multi F
Up to Six Zones
Multi F MAX

Table of Contents

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LG LMU300HHV Specifications

General IconGeneral
RefrigerantR410A
Phase1
Voltage208-230V
Power Supply208-230V/60Hz/1Phase
Operating Temperature (Heating)75 °F

Summary

SAFETY INSTRUCTIONS

Table of Symbols

Defines warning symbols used in the manual for hazard identification.

General Safety Precautions

Critical warnings and cautions for safe installation, wiring, and operation.

UNIT NOMENCLATURE

GENERAL DATA

PLACEMENT CONSIDERATIONS

Outdoor Unit Location Selection Criteria

Criteria for choosing optimal locations for outdoor units, including clearances and environmental factors.

Selecting the Best Location for the Indoor Units

MOUNTING / ANCHORING THE OUTDOOR UNITS

Outdoor Unit Mounting and Anchoring Procedure

Step-by-step instructions for securely mounting and anchoring outdoor units.

MOUNTING / ANCHORING THE BRANCH DISTRIBUTION UNITS

Branch Distribution Unit Installation Options

Details various methods for installing branch distribution units.

REFRIGERANT SAFETY STANDARDS / DEVICE CONNECTION LIMITATIONS

Refrigerant Safety Standards and Concentration Limits

Addresses refrigerant safety and concentration limits per industry standards.

REFRIGERANT SYSTEM ENGINEERING

Pipe Sizing and Component Restrictions

Guidelines on pipe sizing and restrictions on inline components.

FLARING AND BRAZING PROCEDURES

Flaring Procedure

Step-by-step guide for creating proper flare connections for R410A.

Brazing Procedure

Instructions for performing field brazing of refrigerant pipes with safety precautions.

INSTALLING MULTI F WITH LGRED SYSTEMS

Branch Distribution to Indoor Unit Piping Connections

INSTALLING MULTI F MAX WITH LGRED SYSTEMS

Y-Branch Kit Installation

INSULATION

General Piping System Insulation

Comprehensive guide on insulating refrigerant piping systems for safety and performance.

ELECTRICAL

Power Wiring and Communications Cable Connections

Detailed instructions for electrical wiring, cable connections, and diagrams.

ERROR CODE TABLES

Troubleshooting Using Error Codes

Introduction to error codes for diagnosing unit failures.

Indoor Unit Error Codes

Lists and explains error codes specific to indoor units.

Outdoor Unit Error Codes

Lists and explains error codes specific to outdoor units.

LG MONITORING VIEW (LGMV) DIAGNOSTIC SOFTWARE

LG SMART INVERTER MONITORING SYSTEM (SIMS)

INSTALLATION CHECKLIST

Major Component Rough-In Checklist

Checklist for ensuring major components are installed correctly.

MULTI F WITH LGRED REFRIGERANT CHARGE WORKSHEET

Multi F Refrigerant Charge Calculations

Worksheet for calculating the required refrigerant charge for Multi F systems.

MULTI F MAX WITH LGRED REFRIGERANT CHARGE WORKSHEET

Multi F MAX Refrigerant Charge Calculations

Worksheet for calculating the required refrigerant charge for Multi F MAX systems.

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