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LG CEILING CASSETTE TYPE AIR CONDITIONERS Installation Instructions Manual
LG CEILING CASSETTE TYPE AIR CONDITIONERS Installation Instructions Manual

LG CEILING CASSETTE TYPE AIR CONDITIONERS Installation Instructions Manual

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CEILING CASSETTE TYPE AIR CONDITIONERS

INSTALLATION INSTRUCTIONS

• This unit is charged with new refrigerant, R-407C.
• Be sure to use proper tools for R-407C, when installing the unit.
• Please read this instruction sheet completely before installing the product.
• When the power cord is damaged, replacement work shall be performed by authorized
personnel only.
• Installation work must be performed in accordance with the national wiring standards by
authorized personnel only.
Indoor Unit
Air Outlet
Outdoor Unit
Air Intake
(side, rear)
Air outlet
(Refrigerant : R-407C)
Air
Intake
Air Intake
(side, rear)
Air Outlet
Vents
Control
cover
Connecting
wire
Connection Tube
Drain hose
Anti-bacteria filter
Connecting Wire
Power Wire
Connection Tube
Drain Hose
Cooling & Heating Model has
included Drain Elbow
P/No.: 3828A20102U

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Table of Contents
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Summary of Contents for LG CEILING CASSETTE TYPE AIR CONDITIONERS

  • Page 1: Installation Instructions

    CEILING CASSETTE TYPE AIR CONDITIONERS INSTALLATION INSTRUCTIONS (Refrigerant : R-407C) • This unit is charged with new refrigerant, R-407C. • Be sure to use proper tools for R-407C, when installing the unit. • Please read this instruction sheet completely before installing the product.
  • Page 2: Table Of Contents

    OUT-LINE OF INSTALLATION 1.The following should be always observed for safety ....... 3 2.Installation of Indoor, Outdoor Unit ............4 Installation Works Installation Parts Required Tools • Connecting cable • Level 1) Selection of the best location ......4 • Pipes: Gas side •...
  • Page 3: The Following Should Be Always Observed For Safety

    1. The following should be always observed for safety • Please report to or take consent by the supply authority before connecting to the system. • Be sure to read "THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY" before installing the air conditioner. •...
  • Page 4: Installation Of Indoor, Outdoor Unit

    2. Installation of Indoor, Outdoor Unit 1. 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 Ceiling Board prevent the air circulation.
  • Page 5: Bolt Location(Unit: Mm)

    2. 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. 600 (Ceiling opening) 875 (Ceiling opening) 521(Hanging bolt) 785 (Hanging bolt) 39.5 39.5 570 Unit size 840 Unit size Unit:mm...
  • Page 6: The Indoor Unit Installation

    3. 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) Flat washer for M10 (accessory) Set screw of...
  • Page 7: Wired Remote Control Installation

    WIRED REMOTE CONTROL INSTALLATION DISASSEMBLING Front case • Separate the under plate from Remote control box. Lever carefully Remote control • Fix the cord clamps on the wall by the box open box body using a screw ø 3 tapping screws (accessory). driver, etc.
  • Page 8: Wiring Connection

    5. Wiring Connection • Open the control box cover and connect the Remote controller cord and Indoor power wires. Indoor power cord Control box cover Remote [Air inlet side view] controller cord Control box cover 18K/24K/28K Btu • Heat Pump Model Terminal Block of Indoor Unit Terminal Block of Outdoor Unit 3(L) 4(N)
  • Page 9: Electrical Wiring

    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 10: Connecting Pipes To The Indoor Unit

    6. Connecting Pipes to the Indoor Unit • Preparation of Piping Main cause of gas leakage is defect in flaring Copper Slanted Uneven Rough tube 90° work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. Use the accessory piping kit or the pipes purchased locally.
  • Page 11: Piping Connection

    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 12: Installation Of Decorative Panel

    7. Installation of Decorative Panel The decorative panel has its installation Before installing the decorative panel, direction. always remove the paper template. 1. Temporarily fix two decorative panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by amount 10mm in length.) The fixing screws (hexagon M5 screw) are included the decorative panel box.
  • Page 13: Indoor Unit Drain Piping

    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 8.
  • Page 14: Heat Insulation

    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"...
  • Page 15: Test Running

    In case of the Outdoor Unit being installed Seal a small opening above position of the Indoor Unit. around the pipings with gum type sealer. 2. Tape the Pipings and Connecting cable from bottom to top. Trap 3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room.
  • Page 16: Connection Of Power Supply

    2) Connection of power supply 1. Connect the power supply cord to the independent power supply. • Circuit breaker is required. 2. Operate the unit for fifteen minutes or more. 3) Evaluation of the performance 1. Measure the temperature of the intake and discharge air.
  • Page 17: Auxiliary Operation

    4. Optional Operation 1) Two Thermistor System (1) Open the rear cover of the wired remote-controller to set the mode. (2) Select one of three selectable modes as follows. • Position 1: The room temperature is controlled by the thermistor of the main body. •...
  • Page 18: Ajusting To The Height Of Ceiling

    2) Adjusting air volume to the height of ceiling You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the comfortable atmosphere to consumers. Procedure 1. Choose the selectable position in the table after measuring the height of ceiling. Ceiling height Mode of slide switch Change of air volume...
  • Page 19: Group Control (Optional Wiring)

    3) Group Control(Optional Wiring) • You can use a group control operation after connecting the brown and yellow wire of each air-conditioner. • Remove the resistor "OP 7" in remote controller. • It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent overcurrent.
  • Page 20: Central Control (Optional)

    MEMO...

Table of Contents