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INSTALLATION MANUAL
AIR
CONDITIONER
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.
Original instruction
MFL67798024
Rev.04_091224
Copyright © 2015 - 2024 LG Electronics Inc. All Rights Reserved.
www.lghvac.com
www.lg.com
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Table of Contents
Related Manuals for LG MULTI V S ARUN024GSS4
Summarization of Contents
INSTALLATION PROCESS
Determination of division work
Specifies how to determine and assign installation tasks.
Preparation of contract drawings
Details the process of creating and preparing necessary contract drawings.
Sleeve and insert work
Describes the steps for performing sleeve and insert work during installation.
Installation of indoor unit
Covers the procedures for installing the indoor unit correctly.
Refrigerant piping work
Instructions for carrying out the refrigerant piping installation.
Drain pipe work
Procedures for installing and connecting the drain pipe.
Duct work
Guidelines for installing ductwork for air circulation.
Heat insulation work
Details the process of applying heat insulation to the piping.
Electrical work (connection circuits and drive circuits)
Instructions for electrical connections, including circuits and drive systems.
Airtight test
Describes the procedure for conducting an airtight test to check for leaks.
Vacuum drying
Steps for vacuum drying the system to remove moisture and air.
Additional charge of refrigerant
Guidance on calculating and adding the correct amount of refrigerant.
Fit facing panels
Instructions for fitting facing panels onto the unit.
Automatic addressing of indoor unit
Process for setting up automatic addressing for indoor units.
Test run adjustment
Procedures for performing test runs and making necessary adjustments.
Transfer to customer with explanation
Final steps for handing over the installed unit with customer explanations.
OUTDOOR UNITS INFORMATION
CAUTION
Important notes regarding connectable indoor units ratio and operation.
SELECT THE BEST LOCATION
INSTALLATION SPACE
Specifies minimum required clearances for installation and service.
LIFTING METHOD
CAUTION
Safety precautions when handling and carrying the product.
INSTALLATION
The location of the Anchor bolts
Details the placement and requirements for anchor bolts.
Foundation for Installation
Outlines the procedure and materials for creating a stable installation foundation.
Preparation of Piping
Burrs removal
Instructions for removing burrs from pipes to ensure proper connection.
Flaring work
Steps for performing flaring work on pipes using a flaring tool.
Flare shape and flare nut tightening torque
Visual guide to correct flare shape and specifications for tightening flare nuts.
Precautions when connecting pipes
Key safety and procedural notes for connecting refrigerant pipes.
Plumbing materials and storage methods
Refrigerant piping on three principles
Explains core principles for refrigerant piping regarding moisture, cleanliness, and airtightness.
REFRIGERANT PIPING INSTALLATION
Precautions on Pipe connection / Valve operation
Important considerations for connecting pipes and operating valves during installation.
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
Preparation Work
Steps to prepare the outdoor unit cover for pipe routing.
Remove leakage prevention cap
Pipe Drawing Out during Single connection
Methods for drawing out pipes on the front and right sides.
Method of drawing out pipes on the rear side
Procedure for drawing out pipes from the rear side of the unit.
Selection of Refrigerant Piping
2 Ton
Piping selection details specific to 2 Ton models.
Piping parts
Identifies and describes the different parts of the refrigerant piping system.
Size of main pipe
Tables detailing main pipe sizes based on outdoor unit capacity.
Pipe size of between branching sections
Information on pipe sizes for sections between branches.
Connecting pipe size of indoor unit
Details pipe sizes for connections to indoor units.
Refrigerant pipe locking torque
Torque specifications for locking refrigerant pipe flare nuts.
Refrigerant piping system
Y branch method
System layout and pipe length calculations for Y branch configurations.
Header Method
System layout and pipe length calculations for Header configurations.
WARNING
Advises on pipe length differences and their impact on performance.
Refrigerant pipe diameter from outdoor unit to first branch. (A)
Specifies pipe diameters for the initial branch from the outdoor unit.
Refrigerant pipe diameter from branch to branch (B,C,D)
Details pipe diameters for connections between branches.
Combination of Y branch/header Method
Illustrates system configurations combining Y branch and header methods.
The amount of Refrigerant
Additional charge(kg)
Formula for calculating additional refrigerant charge based on pipe length and correction factors.
Amount refrigerant of Indoor units
Example calculation for total refrigerant amount needed for indoor units.
Refrigerant charging
WARNING
Warnings about vacuuming pipes and refrigerant accuracy.
Distribution Method
Horizontal Distribution
Diagrams showing how to distribute refrigerant horizontally.
Vertical Distribution
Diagrams showing how to distribute refrigerant vertically.
The others
Additional distribution methods or diagrams.
Header
Diagrams related to header configurations for refrigerant distribution.
Branch pipe Fitting
Y branch
Instructions and diagrams for fitting Y branch pipes.
Header
Instructions and diagrams for fitting header components.
Pipe cutter
Guidelines for using a pipe cutter for precise pipe adjustments.
Vacuum
Vacuum Mode
Explains the function for creating vacuum after component replacement.
Vacuum mode setting method
Step-by-step guide to setting up the vacuum mode.
Vacuum mode off method
Instructions for turning off the vacuum mode.
WARNING
Safety warnings for leakage tests and air purging.
NOTE
Advice on adding refrigerant and using vacuum mode.
WARNING
Warning about recharging after evacuation when moving the unit.
CAUTION
Caution regarding compressor operation during vacuum mode.
Thermal insulation of refrigerant piping
NOTE
Note on using polyethylene cover instead of asphalt roofing.
Control box and connecting position of wiring
WARNING
Warning about protecting the outdoor air temperature sensor from sunlight.
Precautions when laying power and ground wiring
CAUTION
Cautions regarding cable usage and connections for communication and power.
Communication and Power Cables
Communication cable
Specifications for communication cables, including types and cross-sections.
Remote control cable
Information on remote control cable types.
Central control cable
Details on central control cable types.
CAUTION
Caution regarding grounding of shielded wires.
Separation of communication and power cables
Recommendations for spacing communication and power cables.
Field Wiring
Single outdoor unit
Wiring diagrams for single outdoor units (1 phase).
3 Phase, 208/203 V, 60 Hz
Wiring diagrams for 3-phase outdoor units.
Example) Connection of transmission wire
Examples of transmission wire connections (BUS and STAR types).
Example) Connection of power and communication cable
Example connections for power and communication cables for a 2 Ton unit.
WARNING
Importance of proper grounding and wiring practices.
Checking the setting of outdoor units
Checking according to DIP switch setting
How to check unit settings via DIP switches and 7-segment LED.
Checking the initial display
Explanation of the initial display sequence representing setting conditions.
CAUTION
Caution regarding interference with oil level sensors.
Automatic Addressing
Automatic Addressing
Process for automatically setting addresses for indoor units.
CAUTION
Cautions for PCB replacement and communication setup.
The Procedure of Automatic Addressing
Step-by-step guide for performing automatic addressing.
Setting the function
Group Number setting
How to set group numbers for indoor units.
Group Number setting for Indoor Units
Detailed steps for configuring group numbers for multiple indoor units.
Outdoor Units (External PCB)
Diagram showing external PCB connections for outdoor units.
Example) Group number setting
Example illustrating group number assignment.
Group recognizing the central controller
How the central controller recognizes groups of indoor units.
Cool & Heat selector (Fn 1)
Method for setting the cooling and heating mode using Fn1.
Function setting
Night Low Noise Function (Fn 3)
Enables low fan RPM at night to reduce noise.
Night low noise function setting method
Steps to configure the night low noise function.
High Static Pressure Compensation mode (Fn 2)
Adjusts airflow for static pressure applied by ducts.
Static pressure compensation mode setting method
Steps to configure the static pressure compensation mode.
FAN Maximum RPM of each step
Table showing maximum fan RPM for different models and steps.
Setting the ODU address (Fn 5)
Method for setting the outdoor unit's address.
Mode setting method
Steps to set the ODU address.
Snow removal & rapid defrost (Fn 6)
Mode setting method
Steps to configure snow removal and defrost functions.
Base Pan Heater setting
Mode setting method
Steps to configure the base pan heater operation mode.
Target pressure adjusting (Fn 8)
Mode setting method
Steps to adjust target pressure settings.
Self-Diagnosis Function
Error Indicator
Explains how error codes are displayed and what they mean.
Error Display
Table showing error codes, titles, and causes for indoor unit related errors.
Outdoor unit related error
Table showing error codes, titles, and causes for outdoor unit related errors.
Outdoor unit related error
Title
Lists titles of various outdoor unit errors.
Cause of Error
Explains the causes for specific outdoor unit error codes.
CAUTION FOR REFRIGERANT LEAK
Introduction
Information on refrigerant safety and concentration limits.
Concentration limit
Defines concentration limit and its units for refrigerant leakage.
Checking procedure of Concentration limit
Steps to check concentration limit and take appropriate measures.
Calculate minimum room capacity
Method to calculate minimum room capacity for safety calculations.
In case the concentration exceeds the limit
Countermeasures to take when refrigerant concentration limits are exceeded.
INSTALLATION GUIDE AT THE SEASIDE
CAUTION
Precautions for installing units in corrosive seaside environments.
Selecting the location (Outdoor Unit)
Guidance on selecting an outdoor unit location to avoid sea wind.
Airborne Noise Emission
Information on sound pressure levels and exposure factors.
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