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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.
TYPE : Ceiling Cassette
P/NO : MFL42291413
www.lg.com
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Table of Contents
Related Manuals for LG LT-H182QLE0
Summary of Contents for LG LT-H182QLE0
- Page 1 • 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. TYPE : Ceiling Cassette www.lg.com P/NO : MFL42291413...
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Page 2: Table Of Contents
Ceiling Cassette Air Conditioner Installation Manual TABLE OF CONTENTS Installation Required Parts Required Tools Requirements ❏ Connecting cable ❏ Horizontal meter Safety Precautions ......3 ❏ Pipes: Gas side ❏ Screw driver Liquid side ❏ Electric drill Introduction..........6 ❏ Hanging Bolt Symbols used in this Manual ....6 ❏... -
Page 3: Safety Precautions
Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury. - Page 4 Safety Precautions For installation, always contact the dealer or an Do not install the product on a defective installation Authorized Service Center. stand. • There is risk of fire, electric shock, explosion, or • It may cause injury, accident, or damage to the injury.
- Page 5 Safety Precautions ■ Installation Always check for gas (refrigerant) Install the drain hose to ensure Keep level even when installing leakage after installation or repair that water is drained away the product. of product. properly. • Low refrigerant levels may •...
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Page 6: Introduction
Introduction Introduction Symbols used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that may cause harm to the air conditioner. This symbol indicates special notes. NOTICE Features Anti-bacteria Air Outlet Air Inlet Remote Controller... -
Page 7: Installation
Installation Installation Installation Tools Figure Name Figure Name Screw driver Ohmmeter Electric drill Hexagonal wrench Measuring tape, Knife Ammeter Hole core drill Gas-leak detector Thermometer, Spanner Horizontal meter Torque wrench Flaring tool set Installation Manual 7... -
Page 8: Installation Of Indoor, Outdoor Unit
Installation Installation of Indoor, Outdoor Unit Selection of the best location 1) Indoor unit • There should not be any heat source or steam near the unit. Ceiling Ceiling Board • There should not be any obstacles to prevent Ceiling Board the air circulation. - Page 9 3) Piping length and the elevation Pipe Size *Additional Length A(m) Elevation B(m) mm(inch) Model refrigerant (g/m) Liquid Standard Max. Standard Max. LT-H182QLE0 12.70(1/2”) 6.35(1/4”) LT-H242QLE0 15.88(5/8”) 6.35(1/4”) LT-H302PLE0 15.88(5/8") 6.35(1/4") LT-H362NLE0 15.88(5/8") 6.35(1/4") LT-H482MLE0 19.05(3/4") 9.52(3/8") LT-H602MLE0 19.05(3/4") 9.52(3/8") LT-C182QLE0 12.70(1/2”) 6.35(1/4”) LT-C242QLE0 15.88(5/8”) 6.35(1/4”)
- Page 10 Installation Ceiling opening dimensions and hanging bolt location • The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions. • Please use included paper or cardboard on the bottom of packaging as installation paper •...
- Page 11 Installation The Indoor Unit Installation Ceiling Keep the length of the bolt Hanging bolt from the bracket to 40mm (W3/8 or M10) Flat washer for M10 Air Conditioner body (W3/8 or M10) (Attached Insulator, Ceiling board Ceiling board Spring washer accessory) (M10) Keep the length of 31~34mm...
- Page 12 Installation WIRED REMOTE CONTROL INSTALLATION 1. Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup. - Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box.
- Page 13 Installation 3. Please fix remote controller upper part <Connecting order> into the setup board attached to the surface of the wall, as the picture below, and then, connect with setup board by pressing lower part. Wall Wall Side Side - Please connect not to make a gap at the remote controller and setup board’s upper and lower, right and left part.
- Page 14 Installation Wiring Connection • Open the control box cover and connect the Remote controller cord and Indoor power wires. Connecting Cable Remote Controller Cable 1 Phase Terminal Block of Outdoor Unit Terminal Block of Indoor Unit 1(L) 2(N) 1(L) 2(N) 3 1(L) 2(N) 18k/24k/30k...
- Page 15 Installation ◆ Precautions when laying power wiring Use round pressure terminals for connections to the power terminal block. Power wire Round pressure terminal When none are available, follow the instructions below. • Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.) •...
- Page 16 Installation ELECTRICAL WIRING 1. All wiring must comply with LOCAL REGULATIONS. 2. Select a power source that is capable of supplying the current required by the air conditioner. 3. Feed the power source to the unit via a distribution switch board designed for this purpose. 4.
- Page 17 Installation Connecting Pipes to the Indoor Unit • Preparation of Piping Copper Main cause of gas leakage is defect in flaring Slanted Uneven Rough tube work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. •...
- Page 18 Installation Piping Connection 1. Form the piping according to its routing. Avoid bending and Liquid side bending back the same piping point more than three times. (This will result in hardening the pipe.) Indoor 2. After deforming the piping, align centers of the union fitting of unit the indoor unit and the piping, and tighten them firmly with Outdoor...
- Page 19 Installation Installation of Decorative Panel The decorative panel has its installation direction. Before installing the decorative panel, always remove the paper template. 1. Remove the packing and take out air inlet grille from front panel. Front grille 2. Remove the Corner covers of the panel. Coner cover 3.
- Page 20 Installation 5. Fit the corner covers. 6. Open two screws of control panel cover. Screw 7. Connect one display connector and two vane control connectors of front panel to indoor unit PCB. The position marking on PCB is as: Display connector : CN-DISPLAY Vane control connector: CN-VANE 1,2 CN-VANE 1,2 CN-DISPLAY 8.
- Page 21 Installation CAUTION: Install certainly the decorative panel. Cool air leakage causes sweating. ⇨ Water drops fall. Good example Bad example Air conditioner unit Air conditioner Cool air leakage unit (no good) Ceiling Ceiling board board Decorative Decorative panel panel Fit the insulator (this part) and be careful for cool air leakage Indoor Unit Drain Piping Upward...
- Page 22 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "KS Standard Conditions with Mist"...
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Page 23: Air Purging
Installation In case of the Outdoor Unit being installed above position of the Indoor Seal a small opening Unit. around the pipings with gum type sealer. 4. Tape the Pipings and Connecting cable from bottom to top. Trap 5. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room. - Page 24 Installation CAUTION: To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position. 7. Check for leakage with Liquid soap solution. Do the leakage test at all joints of tubing (indoor and outdoor) and on the service valve (both gas and liquid side).
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Page 25: Test Running
Installation 3. Once the desired vacuum is created. Disconnect the vacuum pump and open the liquid side valve stem by turning it to counter-clockwise direction with service valve wrench. 4. Open completely the gas side valve by turning to counter-clockwise with service valve wrench. 5. - Page 26 Installation 3) Evaluation of the performance 1. Measure the temperature of the intake and discharge air. 2. Ensure the difference between the intake temperature and the discharge one is more than 8°C (Cooling) or reversely (Heating). Thermometer CAUTION After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power specialized for the air conditioner.
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Page 27: Installer Setting -Pqrcusa0
Installation Installer Setting -How to enter installer setting mode Installer setting mode is to set the detail function of the remote controller. If the installer setting mode is not set correctly, it can cause problems to the product, user injury or property damage. - Page 28 Installation <Installer Setting Code Table> 1) General air-conditioner product Function Code Value Test Run 01:Set Address Setting 00~FF : Address <ESP Step><ESP Value> <Example> 01:VeryLow 0 ~ 255 02:Low E.S.P. Value 03:Med 04:High Function Code ESP step ESP value 05:Very High 01:Remo Thermistor 02:Indoor...
- Page 29 Installation 2) General Ventilation product Function Code Value Test Run 01 : Test Run Setup 00~FF : Address of Central Control Address Setting SA(Supply Air) ESP <ESP level> <ESP value> <Example> 01 : Low 0~255 02 : High EA(Exhaust Air) ESP Function Code ESP step ESP value...
- Page 30 Installation Installer Setting -Test Run Mode After installing the product, you must run a Test Run mode. For details related to this operation, refer to the product manual. If pressing button long for 3 seconds, it enters into remote controller setter setup mode.
- Page 31 Installation Installer Setting - Setting Address of Central Control It's the function to use for connecting central control. Please refer to central controller manual for the details If pressing button long for 3 seconds, it enters into remote controller setter setup mode. - If pressing once shortly, it enters into user setup mode.
- Page 32 Installation Installer Setting -Thermistor This is the function to select the temperature sensor to judge the room temperature. If pressing button long for 3 seconds, it enters into remote controller setter setup mode. - If pressing once shortly, it enters into user setup mode.
- Page 33 Installation Installer Setting -Ceiling Height Selection This function is to adjust FAN Airflow rate according to ceiling height (For ceiling type product) If pressing button long for 3 seconds, it enters into remote controller setter setup mode. - If pressing once shortly, it enters into user setup mode.
- Page 34 Installation Installer Setting-Remote Controller Master/Slave Setup It is a function for settings in group control, or 2-remote controller control. If pressing button long for 3 seconds, it enters into remote controller setter setup mode. - If pressing once shortly, it enters into user setup mode.
- Page 35 Installation Installer Setting - Option Function Setting Dry contact function is the function that is possible to use only when dry contact equipment is separately purchased/setup. If pressing button long for 3 seconds, it enters into remote controller setter setup mode. - If pressing once shortly, it enters into user setup mode.
- Page 36 Installation Installer Setting - Option Function Setting Setting feature for indoor unit when Air cleaning / Heater / Dehumidifier / Up/down grill / Ventilation KIT is newly installed, or installed unit is removed. If pressing button long for 3 seconds, it enters into remote controller setter setup mode.
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Page 37: Installation Guide At The Seaside
Installation Installation guide at the seaside CAUTION: 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product.