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Installation Manual 

3

ENGLISH

IMPORTANT!
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.

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.
• 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.

WARNING

WARNING

• 

• Refer to local code for all wiring size.

Installation or repairs made by unqualified persons can result in hazards to you and others.
Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical
Code NFPA 70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.

• 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.

Wall Mounted Mini-Split System

Single Zone

INSTALLATION INSTRUCTIONS

Summary of Contents for LS186HECE

Page 1: ...mpletely 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 WALL MOUNTED www lg com ENGLISH FRANÇAIS ESPAÑOL ...

Page 2: ...ge 25 Forming The Piping 26 Air Purging 27 Air Purging With Vacuum Pump 27 Charging 29 Test Running 30 Installation guide at the seaside 31 Installation plate Four type A screws Connecting cable Pipes Suction line Evaporator line Refer to page 13 Insulation materials Additional drain pipe Outer Diameter 15 5mm 0 61in Two type B screws Installation Requirements Required Parts Required Tools Level g...

Page 3: ...hin 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 locatino...

Page 4: ...f the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Install the indoor unit on the wall where the height from the floors more then 2 4m 8ft There are sharp moving parts that could cause personal injury Do not handle the pipe by yourself customer High Pressure refrigent may cause personal injury Use a dedicated outlet for this appl...

Page 5: ...y for the fresh air When flammable gas leaks turn off the gas and open a window for ventilation before turning the product on Do not use the telephone or turn switches on or off There is risk of explosion or fire Unplug the unit if strange sounds odors or smoke comes from it There is risk of fireproduct failure and or electric shock Stop operation and close any window in storm or hurricane before ...

Page 6: ...he outdoor unit There could result in personal injury and product damage Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in There are sharp and moving parts that could cause personal injury Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electrical shock Unplug the appliance befor...

Page 7: ... Do not direct airflow at room occupants This could damage your health Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigeration system There is risk of damage or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh detergents s...

Page 8: ...n a fire They may burn or explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote if the batteries have leaked The chemicals in batteries could cause burns or other health hazards If you eat the liquid from the batteries brush your teeth and see doctor Do not use the remote if the batteries have leaked The chemicals in batteries c...

Page 9: ...e harm to the air conditioner This symbol indicates special notes NOTICE Introduction Symbols Used In This Manual Features Air Inlet Vents Air Outlet Vents Connecting Wires Piping Drain Hose Base Plate Air Outlet Vents Air Inlet Vents Piping Connecting Wires Drain Hose Signal Receptor Base Plate Front Panel Air Inlet Air Filter ENGLISH ...

Page 10: ...1 Type 2 Installation plate Installation plate 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 Installation Parts Installation Tools Installation Read carefully and then follow step by step ...

Page 11: ...st To carry out the drainage test remove the air filters and pour water into the heat exchanger Saddle Gas side piping Liquid side piping Additional drain pipe Drain Hose Base Plate Air Inlet Vents Connecting cable Installation Plate Sleeve Bushing Sleeve Putty Gum Type Sealant Bend the pipe as closely on the wall as possible but be careful that it doesn t break NOTICE NOTE refrigerant line wall t...

Page 12: ...omposition R 410A R32 R125 50 50wt NOTE Never mix with other refrigerants 4 High pressure 1 6 times higher than R 22 High Pressure refrigerant may cause personal injury Do not handle the pipe by yourself customer High pressure refrigerant may cause personal injury manifold gauge charging and any piping tools must be dedicated to R 410A systems NOTICE Confirm The Refrigerant 12 Room Air Conditioner...

Page 13: ...lled on roof structures or walls this may result in excessive noise and vibration and may be also classed as non serviceable installation Indoor unit 1 Do not have any heat or steam near the unit 2 Select a place where there are no obstacles in front of the unit 3 Make sure that condensation drainage can be conveniently routed away 4 Do not install near a doorway 5 Ensure that the space around the...

Page 14: ... trap should be installed every 5 7meters 16 4 23 0ft In case more than 5m 16 4ft Outdoor unit Indoor unit A B Outdoor unit Indoor unit A B A Oil trap Outdoor unit Indoor unit B 5 27 18k Ø12 7 1 2 Ø6 35 1 4 7 5 25 15 49 20 65 20 0 22 Pipe Size Capacity kW Btu h Suction Evap Standard Length m ft Max Elevation Ⓑ m ft Max length Ⓐ m ft Additional Refrigerant g m oz ft ...

Page 15: ...ne using a level 2 Measure the wall and mark the centerline It is also important to use caution concerning the location of the installation plate routing of the wiring to power outlets is through the walls typically Drilling the hole through the wall for piping connections must be done safely Chassis Hook Installation Plate Type A Installation plate Left rear piping Right rear piping Ø65mm Ø2 55in...

Page 16: ...burrs into the tubing Putting nut on Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work Flaring work Carry out flaring work using flaring tool as shown below Main cause for gas leakage is due to defect in flaring work Carry out correct flaring work in the following procedure mm inch mm Ø6 35 ...

Page 17: ...cting cable Be sure that the drain hose is located at the lowest side of the bundle Locating at the upper side can cause drain pan to overflow inside the unit NOTE If the drain hose is routed inside the room insulate the hose with an insulation material so that dripping from sweating condensation will not damage furniture or floors Foamed polyethylene or equivalent is recommended Indoor unit insta...

Page 18: ... accommodates the rear piping housing section with vinyl tape For right rear piping Connecting the pipings to the indoor unit and drain hose to drain pipe Put a couple drops of refrigerant oil on the face of the flare before assembling taking care not to add any contaminants Align the center of the pipings and sufficiently tighten the flare nut by hand Indoor unit tubing Flare nut Pipings Drain ho...

Page 19: ...oor unit installation Hook the indoor unit onto the upper portion of the installation plate Engage the three hooks of the rear top and rear lower of the indoor unit with the upper edge and lower edge of the installation plate Ensure that the hooks are properly seated on the installation plate by moving it left and right Wrap the insulation material around the connecting portion Overlap the connect...

Page 20: ...h vinyl tape wide Bundle the piping and drain hose together by wrapping them with cloth tape over the range within which they fit into the rear piping housing section Piping for passage through piping hole Drain hose Connecting Wrap the area which accommodates the rear piping housing section with vinyl tape Vinyl tape narrow Connection pipe Connecting cable Indoor unit piping Pipe Vinyl tape wide ...

Page 21: ...ation Information For left piping Follow the instruction below Correct case Press on the upper side of clamp and unfold the tubing to downward slowly Incorrect case Following bending type from right to left may cause damage to the tubing ENGLISH ...

Page 22: ...he drain hose Securely insert both the rubber plug and drain hose into the drain outlets Be sure the rubber the cap is securely fastened so that there is no leakage Finally tighten the flare nut with torque wrench until the wrench clicks When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench Outdoor unit Suction Line piping Bigger diame...

Page 23: ... sure to size each wire allowing several inches longer than the required length for wiring 7 Use lock nuts to secure the conduit tubes 1 shows field wiring 2 Separately wire the high and low voltage line 3 Use heat proof electrical wiring capable of withstanding temperatures up to 167 F 4 Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor...

Page 24: ...wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 Confirm that the 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 Always install an GFCI circuit breaker i...

Page 25: ... any leakage and goes out the drain exit Drain piping The drain hose should point downward for easy drain flow Avoid these situations Drain pan Drain hose Leakage checking Connecting area drain hose Leakage checking Downward slope Do not raise Accumulated drain water Tip of drain hose dipped in water Air Waving Water leakage Water leakage Ditch Less than 50mm gap Water leakage ...

Page 26: ... hose and connecting cable from down to up Secure the tapped piping along the exterior wall using saddle or equivalent Taping Drain hose Pipings Connecting cable Trap is required to prevent water from entering into electrical parts Seal small openings around pipings with a gum type Sealant In cases where the Outdoor unit is installed above the Indoor unit perform the following Tape the piping and ...

Page 27: ...as side service valves on the outdoor unit are kept closed at this stage Leak test Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P S I G Next test for leaks with liquid soap Do a leak test of a...

Page 28: ...curely with an adjustable wrench This process is very important to prevent leakage from the system Replace the valve caps at both gas and liquid side service valves and fasten them tight This completes air purging with a vacuum pump The air conditioner is now ready to test run 1 Remove the caps from the gas side and liquid side valves 2 Remove the service port cap from the gas side valve 3 To open...

Page 29: ...ither added or removed based on 20g 0 22oz of R 410A per meter foot Example A 30ft line set is used 5 additional ft X 0 22 ounce per foot add 1 1 ounces of R 410A Important If you are ever uncertain of the unit charge reclaim evacuate and weigh in the correct charge using the unit nameplate charge adjusting for line sets longer or shorter than 7 5m 25ft Confirm the refrigerant R 410A Use manifold ...

Page 30: ...e intake and discharge of air NOTE If the actual pressure are higher than shown the system is most likely over charged and charge should be removed If the actual pressure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use Bolt Tubing connection This is performed when the unit is to be relocated or the refrigerant circuit ...

Page 31: ...e 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 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 ...

Page 32: ...32 Room Air Conditioner Memo ...

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