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IMPORTANT!

CAUTION: 

Improper installation, adjustment, alteration, service or maintenance can void the warranty.
The weight of the condensing unit requires caution and proper handling procedures when lifting
or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

Safety Precautions

• Always wear safety eye wear and work gloves when installing equipment.
• Never assume electrical power is disconnected. Check with meter and equipment.
• Keep hands out of fan areas when power is connected to equipment.
• R-410A causes frostbite burns.
• R-410A is toxic when burned.

NOTE TO INSTALLING DEALER

: The Owners Instructions and Warranty are to be given to the owner

or prominently displayed near the indoor Furnace/Air Handler Unit.

When wiring:

Electrical shock can cause severe personal injury or death. Only a qualified,

experienced electrician should attempt to wire this system.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.
• 
• The choice of materials and installations must comply with the applicable    local/national or international standards.  

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When transporting:

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and
bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on
the air conditioner can cut your finger.

When installing...

... in a wall: 

Make sure the wall is strong enough to hold the unit's weight.

It may be necessary to construct a strong wood or metal frame to provide added support.

... in a room: 

Properly insulate any tubing run inside a room to prevent "sweating" that can cause

dripping and water damage to wall and floors.

... in moist or uneven locatinons:

Use a raised concrete pad or concrete blocks provide a solid,

level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

... in an area with high winds: 

Securely anchor the outdoor unit down with bolts and a metal

frame. Provide a suitable air baffle.

... in a snowy area(for Heat Pump Model):

Install the outdoor unit on a raised platform that is

higher than drifting snow. Provide snow vents.

When connecting refrigerant tubing

• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Check carefully for leaks before starting the test run.

When servicing

• Turn the power OFF at the main power box(mains) before opening the unit to check or repair

electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have

been left inside the unit being serviced.

Special warnings

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety

procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property

damage, personal injury and/or death.

Please read this instruction sheet completely before installing the product.

This air conditioning system meets strict safety and operating standards. As the installer or service person, 
it is an important part of your job to install or service the system so it operates safely and efficiently.

Installation of all field wiring and components MUST conform with local building codes or, in the absence of local 
codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian 
Electrical code and National Building Code of Canada.

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Indoor Unit

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Страница 1: ...ith the national wiring standards by authorized personnel only Please retain this installation manual for future reference after reading it thoroughly WALL MOUNTED INSTALLATION MANUAL AIR CONDITIONER P NO MFL42803117 http www lghvac com www lg com Copyright 2012 2018 LG Electronics Inc All Rights Reserved ENGLISH FRANÇAIS ESPAÑOL ...

Страница 2: ...room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to wall and floors in moist or uneven locatinons Use a raised concrete pad or concrete blocks provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration in an area with high winds Securely anchor the outdoor unit down with bolts and a metal f...

Страница 3: ...t o Specified torque wrenches different depending on model No o Spanner Half union o A glass of water o Screw driver o Hexagonal wrench o Gas leak detector o Vacuum pump o Gauge manifold o Owner s manual o Thermometer o Holder Remote Controller Installation Parts 4 Safety Precautions 5 Installation 8 Selection of the best location 8 Fixing Installation Plate 8 Piping Method 9 Plumbing materials an...

Страница 4: ...arts Type A screw 6 EA Type B screw 2 EA Conduit mounting plate 1EA Conduit mounting plate 1EA SE S5 Installation plate 1EA Installation plate 1EA Type A screw 6 EA Type B screw 2 EA Installation Parts 4 Indoor Unit ...

Страница 5: ...f injury or damage to properties only Be sure not to do Be sure to follow the instruction Installation Manual 5 ENGLISH 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 t...

Страница 6: ...vice Center There is risk of fire electric shock explosion or injury 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 Use a vacuum pump or Inert nitrogen...

Страница 7: ... noise or hot air from the outdoor unit could damage the neighborhoods 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 malfun...

Страница 8: ...ect should be strong and solid enough to prevent vibration 1 Mount the installation plate on the wall with type A screws If mounting the unit on a con crete wall use anchor bolts Mount the installation plate horizontally by aligning the centerline using a level 2 Measure the wall and mark the centerline It is also important to use caution concerning the loca tion of the installation plate routing ...

Страница 9: ...ting at the upper side can cause drain pan to overflow inside the unit If the drain hose is routed inside the room insulate the hose with an insulation material so that drip ping from sweating condensation will not damage furni ture or floors Foamed polyethylene or equivalent is recommended 4 Indoor unit installation n Hook the indoor unit onto the upper portion of the installation plate Engage th...

Страница 10: ...rap with vinyl tape Drain hose Pipe Vinyl tape wide Vinyl tape narrow Adhesive Drain pipe Indoor unit drain hose Plastic bands Insulation material 10 Indoor Unit If the split type Indoor unit is installed in a wall hav ing hole or opening near by or back side of the unit then the air from other side of the wall can come inside the condition space through that hole open ing That air can cause unwan...

Страница 11: ...f the pipings and sufficiently tighten the flare nut by hand n Tighten the flare nut with a wrench n When extending the drain hose at the indoor unit install the drain pipe 7 Wrap the insulation material around the connect ing portion n Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material Bind them together with vinyl tape so that there is no gap n Wrap the...

Страница 12: ...ate by moving it left and right Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots clicking sound Drain hose Vinyl tape narrow Pipe Wrap with vinyl tape wide Drain hose Connecting Piping for passage through piping hole Tubing holder Hook Push 2 1 12 Indoor Unit If the split type Indoor unit is installed in a wall hav ing hole or ...

Страница 13: ...instruction below Good case Press on the upper side of clamp and unfold the tubing to downward slowly Bad case Following bending type from right to left may cause damage to the tubing Make the space between the tubing and the rear panel Installation Manual 13 ENGLISH ...

Страница 14: ...tting pipe pipe entrance should be taken down Pipe entrance should be fitted cap when pass through the walls No dust in the pipe Until the connection is completed the plumbing pipe entrance should be strictly controlled Pipe entrance should be taken side or bottom When removal burr after cutting pipe pipe entrance should be taken down Pipe entrance should be fitted cap when pass through the walls ...

Страница 15: ...rganic acids generated by oxidation of the alcohol contained in the anti oxidants ants nest corrosion occurs causes of organic acid alcohol copper water temperature Drain Piping 1 To remove the front panel from the indoor unit remove the front panel from the indoor unit cabinet n Set the air direction louvers up and down to the position horizontally by hand n Remove the securing screws that retain...

Страница 16: ...2 L2 3 A 4 B Installation Wiring Connection 1 Connect the wires to the terminals on the control board individually according to the outdoor unit connection Ensure that the color of the wires of outdoor unit and the terminal No are the same as those of indoor unit respectively Connecting cable Remote control cord Remote control cord Remote control cord Connection method of the connecting cable Exam...

Страница 17: ...starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm that the cable thickness is as specified in the power source specification Particularly note the relation between cable length and thickness 7 In a wet or moist area always install an earth leakage circuit breaker 8 The following would be caused by voltage drop Vibration of a magnetic swi...

Страница 18: ...g you must use round pressure terminals 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 When connecting wiring which is the same thickness do as shown in the figure below For wiring use the designated power wire and connect firmly then secure to prevent outside pressur...

Страница 19: ...oor units after setting only the address of master indoor unit Slave indoor unit will be operated like master indoor unit Slave indoor unit can not be individually controlled by Central controller Some remote controller can t perform with Dry Contact and Central controller at the same time So contact us further information about it 5 In case of any error occurs at indoor unit display on the wired ...

Страница 20: ... units M N 17 Units Set only one indoor unit to Master set the others to Slave Set only one wired remote controller to Master set the others to Slave Other than those it is same with the Group Control 1 GND Signal 12V Slave Slave Slave Slave Master Display Error Message Donʼt connect serial 12V line Master LGAP Network System 2 Group Control 2 ...

Страница 21: ...it separate Fresh Air Intake Unit with standard units Because setting temperature are different Other than those it is same with Group Control 1 GND Signal 12V LGAP Network System Display Error Message FAU Master FAU Slave Master Master Master Slave FAU Standard Standard FAU FAU Standard Standard FAU FAU Fresh Air Intake Unit Standard Standard Indoor Unit 3 Group Control 3 ...

Страница 22: ...cable usage 1 It is possible to connect two wired remote controllers with one indoor unit 2 Every types of indoor unit is possible to connect two remote controller 3 It is possible to use wireless remote controller at the same time 4 It is possible to connect with Dry Contact and Central controller at the same time 5 In case of any error occurs at indoor unit display on the wired remote controller...

Страница 23: ...ase call the installing contractor of your product as warranty service will be provided by them CANADA Service call Number 888 LG Canada 888 542 2623 Numéro pour les appels de service LG Canada 1 888 542 2623 ...

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