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LG MU5R40 User Manual

LG MU5R40
482 pages
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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.
[
Representative
]
LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[
Manufacturer
]
MULTI
Original instruction
Copyright © 2017 - 2022 LG Electronics Inc. All Rights Reserved.
MFL70363724
Rev.02_221224
No.09,Jinwei Road,Beichen District,Tianjin,China.
LG Electronics Tianjin Appliances co.,Ltd.
РУССКИЙ ЯЗЫК
УКРАÏНСЬКА
ҚАЗАҚ ТІЛІ
БЕЛАРУСКАЯ МОВА
OZBEK TILI
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

Table of Contents

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LG MU5R40 Specifications

General IconGeneral
RefrigerantR410A
Power Supply220-240V, 50Hz
Number of Connectable Indoor UnitsUp to 5
TypeMulti Split
Cooling Capacity40000 BTU
Outdoor Unit Noise Level54 dB(A)

Summary

Important Safety Instructions

Installation Safety Precautions

Essential safety guidelines for installation work and procedures.

Operation Safety Precautions

Critical safety advice for operating the air conditioner correctly and safely.

Installation

Installation Parts and Clearances

Details included installation parts and required clearance specifications for optimal performance.

Outdoor Unit Installation Location

Guidance on selecting the best site for the outdoor unit, considering airflow and environment.

Rooftop Installation Considerations

Specific advice for installing the outdoor unit on a rooftop structure, ensuring stability and leveling.

Piping Length and Elevation

Specifies maximum piping length and elevation differences allowed for the system.

Refrigerant Charge Calculation

Instructions on calculating additional refrigerant charge based on piping length.

Flaring Work and Pipe Preparation

Detailed steps for preparing and flaring copper pipes to ensure leak-free connections.

Outdoor Piping Connections

Instructions for connecting refrigerant pipes to the outdoor unit using correct torque specifications.

Indoor Unit Cable Connection

Procedures for connecting the power cable and wiring to the indoor unit's control board.

Outdoor Unit Cable Connection

Steps for connecting the power cable to the outdoor unit, including circuit breaker requirements.

Power Wiring Precautions

Guidelines for safe and correct power wiring, emphasizing terminal connections and avoiding heat.

Piping Formation and Routing

Methods for shaping, securing, and routing refrigerant piping and drain hoses for proper function.

Air Purging and Leakage Testing

Procedures for removing air and moisture from the system and performing essential leak tests.

Evacuation and System Finishing

Steps for achieving the required vacuum level and completing the refrigerant system setup.

PI485 PCB Installation Guide

Specific instructions for installing the PI485 PCB on different capacity models.

Test Running and Performance Evaluation

How to conduct a test run and check key performance indicators like refrigerant pressure and air temperature.

DIP Switch Settings and Functions

Configuration of various operational modes and features using DIP switches.

Forced Cooling and Wiring Error Check

Procedures for activating forced cooling and checking wiring correctness using LEDs.

Saving Power Consumption Setup

Instructions for enabling and configuring the saving power consumption feature for efficiency.

Mode Lock and Night Quiet Mode Settings

Configuration options for locking operation modes and activating night quiet mode.

Mode Lock Variations with Other Functions

Further configurations for mode lock, combined with night quiet or power saving modes.

Maximum Combination Capacity

Guidelines for determining the maximum number and capacity of indoor units connectable to an outdoor unit.

Seaside Installation Guidance

Recommendations for installing units in coastal areas to prevent corrosion from sea wind.

Winter Installation and Noise Emission

Advice for winter installation and information on airborne noise emission levels.

Model Designation Explanation

Explains the meaning of various codes in the product model numbers.

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