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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
Model : LT-C462MLE1, LT-C512MLE1
P/NO : MFL42291425
www.lg.com
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Table of Contents
Related Manuals for LG LT-C462MLE1
Summary of Contents for LG LT-C462MLE1
- Page 1 • 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 Model : LT-C462MLE1, LT-C512MLE1 www.lg.com P/NO : MFL42291425...
- Page 2 TIPS FOR SAVING ENERGY TIPS FOR SAVING ENERGY Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below: •...
- Page 3 IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product WARNING It can result in serious injury or death when the directions are ignored CAUTION It can result in minor injury or product damage when the directions are ignored WARNING...
- Page 4 IMPORTANT SAFETY INSTRUCTIONS • Do not install the product on a defective installation stand. - It may cause injury, accident, or damage to the product. • Be sure the installation 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.
- Page 5 IMPORTANT SAFETY INSTRUCTIONS CAUTION Installation • Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant lev- els may cause failure of product. • Install the drain hose to ensure that water is drained away properly. A bad connection may cause water leakage.
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Page 6: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION Fea tures INSTALLATION Installation Tools Installation of Indoor, Outdoor Unit Remote Control Preparation Wiring Connection Connecting Pipes to the Indoor Unit Installation of Decorative Panel Indoor Unit Drain Piping Air Purging Test running Installation guide at the seaside... -
Page 7: Introduction
INTRODUCTION INTRODUCTION Features Filter Air Outlet Air Inlet Remote Controller... -
Page 8: 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 Manifold gauges Vacuum pump... -
Page 9: Installation Of Indoor, Outdoor Unit
INSTALLATION Installation of Indoor, Outdoor Outdoor unit - If an awning is built over the unit to prevent Unit direct sunlight or rain exposure, be careful that heat radiation from the condenser is not Selection of the best location restricted. Indoor unit - There should not be any animals or plants which could be affected by hot air dis-... - Page 10 Model refrigerant (g/m) Liquid Standard Max. Standard Max. LT-C462MLE1 19.05(3/4”) 9.52(3/8”) LT-C512MLE1 19.05(3/4”) 9.52(3/8”) Outdoor unit Indoor unit Outdoor unit Indoor unit CAUTION • Rated performance for refrigerant line length of:7.5m • Capacity is based on standard length and maximum allowance length is on the basis of relia- bility.
- Page 11 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. - Select and mark the position for fixing bolts and piping hole. - Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose.
- Page 12 INSTALLATION NOTE Thoroughly study the following installation locations: In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction, spraying, dispersing of water drops, drain pump malfunction, etc.
- 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...
- Page 14 INSTALLATION The Outdoor Unit Installation • Anchor the outdoor unit with a bolt and nut tightly and horizontally on a concrete or rigid mount. • When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake.
- Page 15 INSTALLATION 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.
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Page 16: Remote Control Preparation
INSTALLATION Remote Control Preparation HOW TO MOUNT ONTO A WALL HOW TO INSERT BATTERIES Remove the battery cover from the remote - Do not use rechargeable bat- controller. teries, such batteries differ - Slide the cover according to the arrow from standard dry cells in direction. -
Page 17: Wiring Connection
- Open the control box cover and connect the Remote controller cord and Indoor power wires. Remote Controller Cable Connecting 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) LT-C462MLE1 LT-C512MLE1 Cooling Model POWER INPUT... - Page 18 Attach insulation sleeve Round crimp-style terminal Electricwire Normal Model Cross-Sectional LT-C462MLE1 (3 wires) LT-C512MLE1 The connecting cable connected to the Connect wires of the same gauge to both sides indoor and outdoor unit should be com- plied with the following specifications (Rubber insulation, type H05RN-F approved by HAR or SAA).
- Page 19 Holder for power supply cord / LOCAL REGULATION. connecting cable Power supply cord Over 5mm Cover control Main power Model Circuit Breaker (A) source LT-C462MLE1 LT-C512MLE1 Circuit Breaker Use circuit breaker or time delay fuse. Switch box Refrigerant pipe...
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Page 20: Connecting Pipes To The Indoor Unit
INSTALLATION Connecting Pipes to the Indoor Unit Putting nut on - Remove flare nuts attached to indoor and - Preparation of Piping outdoor units, than put them on pipe/tube Main cause of gas leakage is defect in flaring having completed burr removal. work. - Page 21 INSTALLATION Check Liquid side *Compare the flared work with figure below. *If flare is noted to be defective, cut off the Indoor flared section and do flaring work again. unit - If the piping and the drain hose are in com- Outdoor mon direction bundle the piping and the drain Flare connection...
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Page 22: Installation Of Decorative Panel
INSTALLATION Installation of Decorative Panel Insert two screws on diagonal corners of panel. Do not tighten the bolts completely. (The fixing screws are included in the The decorative panel has its installation indoor unit box.) direction. Check the alignment of panel with the ceil- Before installing the decorative panel, ing. - Page 23 INSTALLATION Open two screws of control panel cover. Fit the link on the panel as shown in pic- ture. (The link is included in the front panel unit box.) Link Screw Connect one display connector and two vane control connectors of front panel to indoor unit PCB.
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Page 24: Indoor Unit Drain Piping
INSTALLATION Indoor Unit Drain Piping CAUTION - Drain piping must have down-slope (1/50 to Install certainly the decorative panel. 1/100): be sure not to provide up-and-down Cool air leakage causes sweating. ⇨ slope to prevent reversal flow. Water drops fall. - During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit. - Page 25 INSTALLATION Drain test HEAT INSULATION The air conditioner uses a drain pump to drain - Use the heat insulation material for the water. refrigerant piping which has an excellent heat-resistance (over 120°C). Use the following procedure to test the drain pump operation: - Precautions in high humidity circumstance: This air conditioner has been tested accord-...
- Page 26 INSTALLATION Form the pipings In case of the Outdoor Unit being Wrap the connecting portion of indoor unit installed above position of the Indoor with the Insulation material and secure it Unit. with two Plastic Bands. (for the right pip- ings) •...
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Page 27: Air Purging
INSTALLATION Air Purging CAUTION Air purging Be sure to use a manifold valve for air The air and moisture remaining in the refriger- purging. If it is not available, use a stop ant system have undesirable effects as indi- valve for this purpose. The "Hi" knob of cated below. - Page 28 INSTALLATION Soap water method Indoor unit - Remove the caps from the 3-way(#1) and 3- way(#2) valves. - Remove the service-port cap from the 3- way(#2) valve. - To open the 3-way(#1) valve turn the valve stem counterclockwise approximately 90°, wait for about 2~3 sec, and close it.
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Page 29: Test Running
INSTALLATION - Once the desired vacuum is created. CHECK THE FOLLOWING ITEMS WHEN Disconnect the vacuum pump and open the INSTALLATION IS COMPLETED liquid side valve stem by turning it to count- - After completing work, be sure to measure er-clockwise direction with service valve and record trial run properties, and store wrench. - Page 30 INSTALLATION Evaluation of the performance CAUTION - Measure the temperature of the intake and discharge air. • Confirm that the cable thickness is as specified in the power sources specifi- - Ensure the difference between the intake cation. temperature and the discharge one is more (Particularly note the relation between than 8°C (Cooling) or reversely (Heating).
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Page 31: Installation Guide At The Seaside
- If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorro- Sea wind sion.