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LG MULTI F LMU18CHV User Manual

LG MULTI F LMU18CHV
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MULTI
F
MAX
MULTI
F
OUTDOOR UNIT
INSTALLATION MANUAL
Multi-Zone Heat Pump Systems
1.5 to 4.5 Tons
Dual and Tri-Zone
Multi F
Quad-Zone
Multi F
Eight-Zone
Multi F MAX
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LG MULTI F LMU18CHV Specifications

General IconGeneral
Cooling Capacity18, 000 BTU/h
Heating Capacity20, 000 BTU/h
RefrigerantR410A
Outdoor Unit Noise Level52 dB(A)
TypeMulti Split
Power Supply208/230V, 1 phase, 60Hz

Summary

SAFETY INSTRUCTIONS

TABLE OF SYMBOLS

Defines symbols used throughout the manual for hazard identification.

Installation Safety

Covers critical safety precautions for installing the unit, including warnings and cautions.

Wiring Safety

Details essential safety guidelines for electrical wiring and connections to prevent hazards.

Operation Safety

Provides safety instructions for operating the unit, covering electrical shock, burns, and general precautions.

SPECIFICATIONS

Multi F Outdoor Unit Specifications

Presents detailed technical specifications for Multi F outdoor units, including capacities and dimensions.

Multi F MAX Outdoor Unit Specifications

Details technical specifications for Multi F MAX outdoor units, covering capacities, dimensions, and electrical data.

Multi F MAX Branch Distribution Unit Specifications

Provides specifications for Multi F MAX branch distribution units, including connectivity and dimensions.

ELECTRICAL DATA

Multi F Outdoor Unit Electrical Data

Lists electrical data for Multi F outdoor units, including voltage, current, and power ratings.

Multi F MAX Electrical Data

Details electrical specifications for Multi F MAX outdoor units, covering power, current, and voltage requirements.

R410A REFRIGERANT

R410A Refrigerant Properties

Explains the properties and safety considerations for using R410A refrigerant.

GENERAL INSTALLATION GUIDELINES

Outdoor Unit Location Selection

Guides on selecting the optimal location for the outdoor unit, considering safety and operational factors.

Rooftop and Site Planning

Covers considerations for rooftop installations, snow/ice planning, and lightning protection.

Outdoor Unit Clearance Requirements

Specifies minimum clearances around the outdoor unit for proper airflow, service access, and obstacle avoidance.

Rigging and Platform Instructions

Provides detailed instructions and safety warnings for rigging, lifting, and platform setup for the outdoor unit.

Outdoor Unit Platform Requirements

Outlines the necessary specifications and dimensions for outdoor unit foundation platforms.

Branch Distribution Unit Location

Guides on selecting the best indoor location for Multi F MAX branch distribution units, considering accessibility and environment.

Branch Distribution Unit Installation

Provides instructions for installing Branch Distribution units, including ceiling and wall mount options.

REFRIGERANT PIPING PREPARATION

Piping Preparation and Flaring

Details procedures for preparing refrigerant piping, including cutting, flaring, and brazing practices.

Piping Materials and Handling

Covers guidelines for selecting, handling, and maintaining piping materials to ensure system integrity.

REFRIGERANT PIPING CONNECTIONS

Device Connection Limitations

Outlines limitations on connecting indoor units to outdoor units and branch distribution units.

Piping Length and Elevation Limitations

Specifies maximum allowable lengths and elevation differences for refrigerant piping.

Multi F MAX Piping Length Limitations

Details piping length and elevation limits specific to Multi F MAX outdoor unit systems.

Multi F Outdoor Unit Piping Connections

Provides guidance on connecting Multi F outdoor units to indoor units, including pipe sizing and connection methods.

Multi F MAX Outdoor Unit Piping Connections

Explains how to connect Multi F MAX outdoor units to branch distribution units and indoor units.

REFRIGERANT PIPING PREPARATION

Flushing the Refrigerant Piping

Describes the process of flushing refrigerant piping with nitrogen gas to ensure cleanliness.

Leak Test and Vacuum Procedures

Details the steps for performing leak tests and vacuum procedures on the refrigerant system.

Vacuum Procedure

Provides step-by-step instructions for evacuating the refrigerant system to remove moisture and air.

Refrigerant Charge

Explains how to calculate and add the correct refrigerant charge based on piping length and system configuration.

Refrigerant Piping System Insulation

Details requirements and methods for insulating refrigerant piping to prevent heat loss/gain and ensure system efficiency.

WIRING

General Wiring Information

Covers general safety warnings and electrical requirements for wiring installations.

Power Wiring and Communications Cable Connections

Guides on connecting power and communication cables to the outdoor unit, terminals, and other components.

Branch Distributor Unit Wiring

Provides instructions for connecting power and communication cables to the BD unit for Multi F MAX systems.

TEST RUN

Test Run Procedure

Outlines the procedure for performing a test run to verify system operation and performance after installation.

DIP SWITCH SETTINGS

Outdoor Unit DIP Switch Settings

Explains how to configure outdoor unit DIP switches for various operational modes and settings.

TROUBLESHOOTING

Self Diagnosis Functions

Covers using LGMV software and SIMs app for system monitoring, diagnostics, and troubleshooting.

Error Codes

Lists and explains error codes displayed by indoor and outdoor units for troubleshooting.

CAUTIONS FOR REFRIGERANT LEAKS

Refrigerant Leak Safety Concerns

Addresses safety concerns related to refrigerant leaks and maximum allowable concentrations in occupied spaces.

INSTALLATION CHECKLIST

Major Component Rough-In Checklist

Confirms proper installation of major components before final assembly and connection.

Condensate Pump / Drain Installation Checklist

Ensures correct setup of condensate drainage systems for units.

Power Wire and Communications Cables Checklist

Verifies correct installation and termination of electrical and communication wiring.

Piping and Insulation Checklist

Checks proper installation and insulation of refrigerant piping.

Brazing Practices Checklist

Confirms adherence to recommended brazing procedures and safety.

Refrigerant Piping Installation Checklist

Verifies correct installation of refrigerant piping, including lengths and connections.

Branch Distribution Unit Installation Checklist

Ensures correct installation of branch distribution units for Multi F MAX systems.

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