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P/NO : MFL42291405

www.lg.com

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

ENGLISH

ESPAÑOL

PORTUGUESE

Summary of Contents for LT-C242PLE0

Page 1: ...anual 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 ENGLISH ESPAÑOL PORTUGUESE ...

Page 2: ... Air purging 23 Test running 25 Installation guide at the seaside 27 o Connecting cable o Pipes Gas side Liquid side o Hanging Bolt W 3 8 or M10 length 650mm o Insulated drain hose o Additional Drain hose Inner Dia 32mm o Horizontal meter o Screw driver o Electric drill o Hole core drill ø70mm o Flaring Tools set o Torque Wrenches o Hexagonal Wrench 4mm 5mm o Gas leak detector o Owner s Manual o I...

Page 3: ... instruction Safety Precautions n Installation Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit There is risk of fire or electric shock For electrical work contact the dealer seller a qualified electrician or an Authorized Service Center Do not disassemble or repair the product There is risk of fire or electric shock Always ground the product There is ...

Page 4: ...allation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furniture Operation Do not touch operate the product with wet hands There is ...

Page 5: ...trange sounds or small or smoke comes from product Turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire When the product is soaked flooded or submerged contact an Authorized Service Center There is risk of fire or electric shock When the product is not be used for a long time disconnect the power supply plug or turn off the breaker There is risk of prod...

Page 6: ...or damage property It may cause a problem for your neighbors Use two or more people to lift and transport the product Avoid personal injury Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation 90 Do not expose the ...

Page 7: ...oduct malfunction or damage Do not insert hands or other objects through the air inlet or outlet while the product is operated There are sharp and moving parts that could cause personal injury Do not drink the water drained from the product It is not sanitary and could cause serious health issues Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal inju...

Page 8: ...lerts 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 Introduction Symbols used in this Manual Features Remote Controller Anti bacteria Air Outlet Air Inlet ...

Page 9: ...H Installation Installation Tools Figure Figure Name Screw driver Electric drill Measuring tape Knife Hole core drill Spanner Torque wrench Ohmmeter Hexagonal wrench Ammeter Gas leak detector Thermometer Horizontal meter Flaring tool set Name ...

Page 10: ...rect sunlight or rain exposure be careful that heat radiation from the condenser is not restricted There should not be any animals or plants which could be affected by hot air discharged Ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles Unit mm Ceiling Ceiling Board Ceiling Board 300 or more Above 2500 400 or less 1000 or more 500 or more 500 or more 300 or less ...

Page 11: ...05 3 4 9 52 3 8 7 5 50 5 30 55 LT C602MLE0 19 05 3 4 9 52 3 8 7 5 50 5 30 55 Installation Installation Manual 11 ENGLISH 3 Piping length and the elevation Outdoor unit Indoor unit A B Outdoor unit Indoor unit A B A Oil trap If piping length is more than 10m Outdoor unit Indoor unit B CAUTION Rated performance for refrigerant line length of 7 5m Capacity is based on standard length and maximum allo...

Page 12: ... etc In these cases take the following actions Make sure that the ventilation fan for smoke collecting hood on a cooking table has sufficient capacity so that it draws oily steam which should not flow into the suction of the air conditioner Make enough distance from a cooking room to install the air conditioner in such a place where it may not suck in oily steam 2 Avoid installing air conditioner ...

Page 13: ...00 CAUTION Tighten the nut and bolt to prevent unit falling Remote Controller Installation Although the room temperature sensor is in the indoor unit the remote controller should be installed in such places away from direct sunlight and high humidity Installation of the remote controller Select places that are not splashed with water Select control position after receiving customer approval The ro...

Page 14: ...to the arrow direction Insert the two batteries Be sure that the and directions are correct Be sure that both batteries are new Re attach the cover Slide it back into position Do not use rechargeable batteries such batteries differ from standard dry cells in shape dimensions and performance Romove the batteries from the remote controller if the air conditioner is not going to be used for some long...

Page 15: ...mm2 1 0mm2 Wiring Connection Open the control box cover and connect the Remote controller cord and Indoor power wires Terminal Block of Outdoor Unit 1 L 2 N 1 L 2 N 3 4 1 L 2 N 3 Terminal Block of Indoor Unit POWER INPUT 1 Phase 24k 30k Heatpump Model 1 Phase 36k Heatpump Model 1 L 2 N 1 L 2 N 3 4 1 L 2 N 3 4 4 Terminal Block of Indoor Unit POWER INPUT Remote Controller Cable Connecting Cable 1 Ph...

Page 16: ...CAL REGULATION Main power source Switch box Refrigerant pipe Circuit Breaker Use circuit breaker or time delay fuse ELECTRICAL WIRING CONNECTING THE CABLE TO OUTDOOR UNIT 1 Remove the Cover control from the unit by loosening a screw Connect the wires to the terminals on the control board individually as following 2 Secure the cable onto the control board with the holder clamper 3 Refix the cover c...

Page 17: ...al Not possible to put them on after flaring work 4 Flaring work Carry out flaring work using flaring tool as shown below Firmly hold copper tube in a bar or die as indicated dimension in the table above 5 Check n Compare the flared work with figure below n If flare is noted to be defective cut off the flared section and do flaring work again If the piping and the drain hose are in common directio...

Page 18: ...n indoor and outdoor connection After completing the piping connection execute vacuum drying for the connecting piping and the indoor unit The vacuum drying must be carried out using the service ports of both the liquid and gas side valves CAUTION Use two wrenches and tighten with regular torque Outdoor unit Liquid side Flare connection Flare connection Gas side Indoor unit Spanner Torque wrench P...

Page 19: ... panel 2 Remove the Corner covers of the panel 3 Fit the panel on the unit by inserting hooks as shown in picture 4 Insert two screws on diagonal corners of panel Do not tighten the bolts completely The fixing screws are included in the indoor unit box Check the alignment of panel with the ceiling Height can be adjusted using hanging bolts as shown in picture Insert the other two screws and tighte...

Page 20: ...t PCB The position marking on PCB is as Display connector CN DISPLAY Vane control connector CN VANE 1 2 8 Close the cover for control box 9 Fit the link on the panel as shown in picture The link is included in the front panel unit box 10 Attach the other side of link on the filter guide of inlet grille Install the air inlet grille and filter on the panel Link Link Filter guide Screw CN VANE 1 2 CN...

Page 21: ...age of water The air conditioner uses a drain pump to drain water Use the following procedure to test the drain pump operation Connect the main drain pipe to the exterior and leave it provisionally until the test comes to an end Feed water to the flexible drain hose and check the piping for leakage Be sure to check the drain pump for normal operating and noise when electrical wiring is complete Wh...

Page 22: ...nt piping gas piping thick piping and drain piping add further 10mm to 30mm thickness material Indoor unit Thermal insulator accessory Fastening band accessory Refrigerant piping HEAT INSULATION 1 Wrap the connecting portion of indoor unit with the Insulation material and secure it with two Plastic Bands for the right pipings If you want to connect an additional drain hose the end of the drain out...

Page 23: ...ter evacuating the system take a leak test for the piping and tubing between the indoor and outdoor unit Air purging with vacuum pump 1 Check that both liquid and gas pipe between indoor and outdoor have been properly connected 2 Remove the service valve cap from both the gas and liquid side on the outdoor unit 3 Confirm that both the liquid and gas side valve are set to the closed position 4 Conn...

Page 24: ...y a soft brush to check for leakage of the connecting points of the piping 5 If bubbles come out the pipes have leakage Gas side Liquid side Cap Hexagonal wrench 2 way valve Open 3 way valve Close Evacuation 1 If the system is found free from all leakages relive the nitrogen pressure by loosening the charge hose connector at nitrogen cylinder Disconnect the hose from cylinder when pressure reaches...

Page 25: ...t temperature wind velocity wind volume voltage current presence of abnormal vibration and noise operating pressure piping temperature compressive pressure As to the structure and appearance check following items o Is the circulation of air adequate o Is the draining smooth o Is the heat insulation complete refrigerant and drain piping o Is there any leakage of refrigerant o Is the remote controll...

Page 26: ...asten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could give rise to burn out of the wires 4 Specification of power source 5 Confirm that electrical capacity is sufficient 6 Be sure that the starting voltage...

Page 27: ...n 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 Selecting the location Outdoor Unit 1 If the outdoor unit is to be installed close to the seaside direct exposure to the sea wind should be avoided Install the outdoor unit on the opposit...

Page 28: ...28 Ceiling Cassette Air Conditioner Memo ...

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