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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 : MFL42291405
www.lg.com
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Table of Contents
Related Manuals for LG LT-H242PLE0
Summary of Contents for LG LT-H242PLE0
- 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 : MFL42291405...
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Page 2: Table Of Contents
Ceiling Cassette Air Conditioner Installation Manual TABLE OF CONTENTS Installation Required Parts Required Tools Requirements o Connecting cable o Horizontal meter Safety Precautions......3 o Pipes: Gas side o Screw driver Liquid side o Electric drill Introduction........8 o Hanging Bolt o Hole core drill (ø70mm) Symbols used in this Manual..8 (W 3/8 or M10 length 650mm) o Flaring Tools set... -
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. n 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 Do not modify or extend the Do not install, remove, or re- Be cautious when unpacking power cable. install the unit by yourself and installing the product. (customer). • There is risk of fire or electric • There is risk of fire, electric •...
- Page 5 Safety Precautions Do not store or use flammable gas If strange sounds, or small or smoke When the product is soaked or combustibles near the product. comes from product. Turn the (flooded or submerged), breaker off or disconnect the power contact an Authorized Service supply cable.
- Page 6 Safety Precautions n 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 •...
- Page 7 Safety Precautions Do not block the inlet or outlet of Use a soft cloth to clean. Do not Do not touch the metal parts of the air flow. use harsh detergents, solvents, product when removing the air filter. etc. They are very sharp! •...
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Page 8: 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 9: 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 9... -
Page 10: 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 11 3) Piping length and the elevation Pipe Size *Additional Length A(m) Elevation B(m) mm(inch) refrigerant (g/m) Liquid Standard Max. Standard Max. LT-H242PLE0 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-C242PLE0 15.88(5/8") 6.35(1/4") LT-C302PLE0 15.88(5/8") 6.35(1/4")
- Page 12 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 13 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) (accessory) Ceiling board Ceiling board Spring washer (M10) Keep the length of 15~18mm between the air conditioner bottom surface and the ceiling surface...
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Page 14: Remote Control Preparation
Installation Remote Control Preparation HOW TO MOUNT ONTO A WALL HOW TO INSERT BATTERIES • Do not use rechargeable batteries, Remove the battery cover from the remote such batteries differ from standard controller. dry cells in shape, dimensions, and • Slide the cover according to the arrow direction. - Page 15 Installation Wiring Connection • Open the control box cover and connect the Remote controller cord and Indoor power wires. Remote Controller Cable Connecting Cable Terminal Block of Outdoor Unit Terminal Block of Indoor Unit 1 Phase 1(L) 2(N) 1(L) 2(N) 3 1(L) 2(N) 24k/30k...
- 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 90° 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 CN DISPLAY 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...
- 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 2. Precautions in high humidity circumstance: (accessory) 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 buy 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: Installation Guide At The Seaside
3) Select a well-drained place. 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water... - Page 28 Memo 28 Ceiling Cassette Air Conditioner...