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LG MULTI F LMU303HV User Manual

LG MULTI F LMU303HV
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MULTI
F
MAX
MULTI
F
OUTDOOR UNIT
INSTALLATION MANUAL
Multi-Zone Heat Pump Systems
1.5 to 5 Tons
Dual and Tri-Zone
Multi F
Quad-Zone
Multi F
Eight-Zone
Multi F MAX

Table of Contents

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LG MULTI F LMU303HV Specifications

General IconGeneral
Cooling Capacity30, 000 BTU/h
RefrigerantR410A
TypeMulti Split
Compressor TypeInverter
Indoor Unit Noise LevelVaries depending on the indoor unit model
Indoor Unit Dimensions (WxHxD)Varies depending on the indoor unit model
Indoor Unit WeightVaries depending on the indoor unit model
Indoor Unit TypeMultiple (compatible with various LG indoor units)

Summary

SAFETY INSTRUCTIONS

Installation Safety Precautions

Provides critical safety guidelines for installing the unit, including electrical and physical safety.

Operation Safety Precautions

Outlines safety precautions for operating the air conditioner, including handling and maintenance.

Installation

PLACEMENT CONSIDERATIONS

Guidelines for selecting optimal installation locations for outdoor and indoor units, considering environmental and operational factors.

General Refrigerant Piping System Information

Refrigerant Safety Standards

Details safety standards for refrigerant concentration in occupied spaces according to ASHRAE.

Device Connection Limitations

Outlines limitations on connecting indoor units and piping lengths for Multi F and Multi F MAX systems.

REFRIGERANT SYSTEM ENGINEERING

FLARING AND BRAZING PROCEDURES

Flaring Procedure

Step-by-step instructions for performing correct flaring on copper pipes to prevent refrigerant leaks.

Brazing Procedure

Details the correct procedure for brazing refrigerant pipes, emphasizing safety and proper techniques.

INSTALLING MULTI F SYSTEMS

Multi F Outdoor Unit to Indoor Unit Piping Connections

Instructions on connecting refrigerant piping between the Multi F outdoor and indoor units, including port identification.

Installing Field Piping to the Outdoor Unit

Steps for connecting field piping to the outdoor unit, including managing connections and using connection sockets.

INSTALLING MULTI F MAX SYSTEMS

Multi F MAX Outdoor Unit System Piping Connections

Guidelines for connecting refrigerant piping to Multi F MAX outdoor units, covering various installation directions.

Branch Distribution to Indoor Unit Piping Connections

Procedures for connecting refrigerant piping from Branch Distribution Units to indoor units, including port identification.

ELECTRICAL

FINAL INSTALLATION PROCEDURES

Triple Leak / Pressure Test

Procedures for performing a triple leak and pressure test on the refrigerant system to ensure it is leak-free.

Deep Evacuation Procedure

Steps for performing deep evacuation to remove moisture and non-condensable gases from the refrigerant system.

Triple Evacuation Procedure

Detailed procedure for triple evacuation, essential for Multi F MAX systems to ensure thorough evacuation.

Refrigerant Charge

Instructions for calculating and adding the correct refrigerant charge, including trim charge calculations for piping length.

Cautions for Refrigerant Leaks

Information on refrigerant safety standards and calculating refrigerant concentration limits to prevent hazards.

Test Run

Procedures for performing a test run to evaluate system performance, including checking refrigerant charge and temperatures.

ERROR CODE TABLES

MAINTENANCE RECOMMENDATIONS

INSTALLATION CHECKLIST PAGE 1

MULTI F REFRIGERANT CHARGE WORKSHEET

MULTI F MAX REFRIGERANT CHARGE WORKSHEET

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