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LG Ceiling Duct-TypeFan Coil UnitINSTALLATION MANUAL

LG

IMPORTANT• Please read this installation manual carefully and

thoroughly before installing and operating the unit.• Please retain this installation manual for future reference

after reading it thoroughly.• Installation work must be performed in accordance with

the national wiring standards by authorized personnel only.

LOW STATIC PRESSURE FCU MODELS

2 Fan Coil Unit

Fan Coil Unit Installation Manual

TABLE OF CONTENTSFOR YOUR RECORDSWrite the model and serial numbers here:

Model #

Serial #

You can find them on a label on the side of each unit.

Dealer's Name

Date Purchased

� Staple your receipt to this page in the event you need it

to prove date of purchase or for warranty issues.

READ THIS MANUALInside you will find many helpful hints on how to use andmaintain your air conditioner properly. Just a littlepreventive care on your part can save you a great dealof time and money over the life of your air conditioner.

You'll find many answers to common problems in thechart of troubleshooting tips. If you review our chart of

Troubleshooting Tips first, you may not need to call forservice at all.

PRECAUTION• Contact the installer for installation of this unit.• The unit is not intended for use by young children or

invalids without supervision.• Young children should be supervised to ensure that

they do not play with the unit.• When the power cord is to be replaced, replacement

work shall be performed by authorized personnel onlyusing only genuine replacement parts.

• Installation work must be performed in accordancewith the National Electric Code by qualified andauthorized personnel only.

Safety Precautions .................3

Care and maintenance ...........8

Before you call for service ..10

Installation ............................11

Installation Manual 3

Safety Precautions

Safety PrecautionsTo prevent injury to the user or other people and property damage, the following instructionsmust be followed.� Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

� Meanings of symbols used in this manual are as shown below.

WARNING

CAUTION

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage.

Be sure not to do.

Be sure to follow the instruction.

WARNING� Installation

Do not use a defective orunderrated circuit breaker.Use this appliance on adedicated circuit.

• There is risk of fire or electricshock.

For electrical work, contactthe dealer, seller, a qualifiedelectrician, or an AuthorizedService Center.

• Do not disassemble or repair theproduct. There is risk of fire orelectric shock.

Always ground the product.


Always install a dedicatedcircuit and breaker.

• Improper wiring or installationmay cause fire or electric shock

Use the correctly ratedbreaker or fuse.


Do not modify or extend thepower cable.


4 Fan Coil Unit

Do not store or use flammablegas or combustibles near theproduct.

• There is risk of fire or failure ofproduct.

Do not use the product in atightly closed space for along time.

• Oxygen deficiency could occur.

When flammable gas leaks, turn offthe gas and open a window forventilation before turn the product on.

• Do not use the telephone or turnswitches on or off.There is risk of explosion or fire

Gasolin

Safety Precautions

� Operation

Do not install, remove, orre-install the unit by yourself(customer).

• There is risk of fire, electricshock, explosion, or injury.

Be cautious when unpackingand installing the product.

• Sharp edges could cause injury.Be especially careful of the caseedges and the fins on theevaporator.

For installation, alwayscontact the dealer or anAuthorized Service Center.

• There is risk of fire, electricshock, explosion, or injury.

Do not plug or unplug thepower supply plug duringoperation.


Do not touch(operate) theproduct with wet hands.

• There is risk of fire or electricalshock.

Do not place a heater orother appliances near thepower cable.

• There is risk of fire and electricshock.

Do not let the unit run for a longtime when the humidity is very highand a door or a window is left open.

• Moisture may condense and wetor damage furniture.

Take care to ensure that powercable could not be pulled out ordamaged during operation.


Do not place anything on thepower cable.



Safety Precautions

If strange sounds, or smallor smoke comes fromproduct. Turn the breaker offor disconnect the powersupply cable.

• There is risk of electric shock orfire.

Stop operation and close thewindow in storm or cyclone.If possible, remove theproduct from the windowbefore the cyclone arrives.

• There is risk of property damage,failure of product, or electric shock.

When the product is soaked(flooded or submerged),contact an AuthorizedService Center.


Be cautious that water couldnot enter the product.

• There is risk of fire, electric shock,or product damage.

Ventilate the product fromtime to time when operatingit together with a stove, etc.


Turn the main power offwhen cleaning ormaintaining the product.

• There is risk of electric shock.

When the product is not be used for a longtime, disconnect the power supply plug orturn off the breaker.

• There is risk of product damage or failure, orunintended operation.

After installing, the waterleakage test should beperfrmed.

• A bad connection may causewater leakage.

Install the drain hose toensure that water is drainedaway properly.

• A bad connection may causewater leakage.

Keep level even wheninstalling the product.

• To avoid vibration or waterleakage.

90°

Safety Precautions

6 Fan Coil Unit

InstallationCAUTION

Operation

Use two or more people to lift and transportthe product.

• Avoid personal injury.

Do not install the product where it will beexposed 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 inefficientoperation.

Do not expose the skindirectly to cool air for longperiods of time.(Don't sit in the draft.)

• This could harm to your health.

Do not use the product forspecial purposes, such aspreserving foods, works ofart, etc. It is a consumer airconditioner, not a precisionrefrigeration system.

• There is risk of damage orloss of property.

Do not block the inlet oroutlet of air flow.

• It may cause product failure.

Safety Precautions


Use a soft cloth to clean. Donot use harsh detergents,solvents, etc.

• There is risk of fire, electric shock,or damage to the plastic parts ofthe product.

Do not touch the metal partsof the product whenremoving the air filter. Theyare very sharp!

• There is risk of personal injury.

Always insert the filtersecurely. Clean the filterevery two weeks or moreoften if necessary.

• A dirty filter reduces the efficiencyof the air conditioner and couldcause product malfunction ordamage.

Wax Thinner

Do not insert hands or otherobjects through the air inletor outlet while the product isoperated.

• There are sharp and moving partsthat could cause personal injury.

Do not drink the waterdrained from the product.

• It is not sanitary and could causeserious health issues.

Use a firm stool or ladderwhen cleaning ormaintaining the product.

• Be careful and avoid personalinjury.

Care and maintenance

8 Fan Coil Unit

B enzene

SCOURINGCLBARGER

S INNER

Air filtersAir outlet vent

Indoor Unit

Caution: Before performing any maintenance, turn off the main power to the system.

Turn the system off before cleaning. To clean,wipe with a soft, dry cloth. Do not use bleach orabrasives.

Note:Supply power must be disconnected before

cleaning the indoor unit.

Never use any of the followings:• Water hotter than 40°C

Could cause deformation and/ordiscoloration.

• Volatile substancesCould damage the surfacesof the air conditioner.

Clean the filter with a vacuum or warm, soapywater.• If very dirty, wash with a solution of

detergent in lukewarm water.

After washing with water, dry well in the shade.

Re-install the air filter.Air FilterThe air filters behind Indoor unit(the suction side) should be checked and cleanedonce every 2 weeks or more often if necessary.

1

2

3


Air filtersAir outlet vent



1

2

When the unit is not going to be used for a long time.

Operation Tips

Helpful informationThe air filters and your electiric bill.If the air filters become clogged with dust, thecooling capacity will drop, and 6% of theelectricity used to operate the air conditioner willbe wasted.

When it is not going to be used fora long time.

When the unit is to be used again.

Operate the unit on Air circulation mode for2 to 3 hours.

• This will dry out the internal parts.

CAUTION:Turn off the circuitbreaker when the air conditioner is notgoing to be used for a long time.

Dirt may collect and may cause a fire.

� Check that the air inlet and outlet of theunit are not blocked.

Do not overcool the room.

This is not good for the healthand wastes electricity.

Keep blinds or curtainsclosed.

Do not let direct sunshineenter the room when the unitis in operation.

Make sure that the doorsand windows are shut tight.

Avoid opening doors andwindows as much as possibleto keep the cool air in theroom.

Clean the air filter regularly.

Blockages in the air filterreduce the airflow and lowercooling and dehumidifyingeffects. Clean at least onceevery two weeks.

Ventilate the roomoccasionally.

Since windows are keptclosed, it is a good idea toopen them and ventilate theroom now and then.

Turn off the circuit breaker.

Before you call for service...

10 Fan Coil Unit

Check the following points before requesting repairs or service.... If the malfunction persist, please contact yourdealer.

Troubleshooting Tips! Save time and money!

The unit does not operate.

The room has a peculiar odor.

Does not cool or heat effectively.

4

4, 5, 7

• Has the fuse blown or has the circuit breakerbeen tripped?

• Check that this is not a damp smell exuded bythe walls, carpet, furniture or cloth items in theroom.

• Is the air filter dirty? See air filter cleaninginstructions.

• The room may have been very hot when theunit was first turned on. Allow time for it to cooldown.

• Are the indoor unit's air inlet or outlet ventsobstructed?

Case Explanation See page

Before you call for service...

Installation


InstallationSelection of the best location

Install the fan coil unit in the location that satisfies thefollowing conditions.

• The place shall easily bear a load exceeding fourtimes the unit’s weight.

• The place shall be able to inspect the unit as thefigure.

• The place where the unit shall be leveled.

• The place shall allow easy water drainage.(Suitabledimension “H” is necessary to get a slope to drain asfigure.)

• The place where the unit is not affected by anelectrical noise.

• There should not be any heat source or steam nearthe unit

H

600600

Top view(unit: mm)

Front view

Front

Rear

0001

300

Confirm the positional relationship between the unitand suspension bolts.

• Installation the ceiling opening to clean the filter orservice under the product.

A(Min)B(Min)

Ceiling

Service Space

A

B

200

ModelDIMENSION

A B03 53004 53006 53008 53010 53012 53014 530

945109512951545174518951995

Unit:mm

14 Fan Coil Unit

Installation

CAUTION:

Ceiling

Drainage hole Make sure to be closed.

Unit

Drainage pipe(Local supply)

Thermal insulator(Local supply)

CAUTION FOR GRADIENT OFUNIT AND DRAIN PIPING

Lay the drain hose with a downwardinclination so water will drain out.

CORRECT INCORRECT

Front of view

mm

3-

1

1. Install declination of the unit is very important for the drain of the duct type unit.2. Minimum thickness of the insulation for the connecting pipe shall be 20mm.

• The unit must be horizontal or declined to the drain hose connected when finished installation.

• Always lay the drain with downward inclination(1/50 to 1/100).Prevent any upward flow or reverse flow in anypart.

• 5mm or thicker formed thermal insulator shallalways be provided for the drain pipe.

mm

3-

1

• Upward routing not allowed

INCORRECTCORRECT


Installation

Insulation, others

Insulate the joint and tubes completely.

THERMAL INSULATION All thermal insulation must comply with local requirementthe thickness min 20mm.

Make sure that there is no clearance here.

Overlap with thermalinsulator for piping.

Thermal insulator for water pipe(Local supply) Thermal insulator for

piping(Local supply)

Hose clip for thermal insulator(Local supply)

Union for water pipe

Water pipe and thermalinsulator(Local supply)

Thermal insulator for water pipe(Local supply)

Hose clip for thermal insulator(Local supply)

Air exit

Connecting Cable to the Fan Coil Unit

Connect the wires to the terminals on the control board individually according to the thermostat.• Ensure that the color of the wires of unit and the terminal No. are the same as those of unit respectively.

Wiring Diagram

38296001

YL

MED

WH WH

Capacitor

43

21

56

YL

YL

MED

WH WHCapacitor

WH WHCapacitor

43

21

56

YL

MED

YLWH WH

Capacitor

WH WHCapacitor

43

21

56

YLWH WH

Capacitor

3

50/60

50/60

50/60

16 Fan Coil Unit

Installation

The power cord connected to the unit should be complied with the following specifications (Rubber insulation, type H05RN-F approved by HAR or SAA).

If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.

CAUTION

mm02

LY/NG

NORMAL CROSS-SECTIONAL AREA 1.25mm2

Install Power Cord

L 1 m

T/B Cover

CAUTION: Make sure that the screws of the terminal fixed tightly.

CAUTION: Prepare the wiring as follows:

1) Never fail to have an individual power specialized for the unit. As for the method of wiring, be guided by thecircuit diagram pasted on the side panel.

2) Provide a circuit breaker switch between power source and the unit.

3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations towhich the unit is subjected during the course of transportation. Check them and make sure that they are alltightly 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 is maintained at more than 90 percent of the rated voltage marked on the nameplate.

7) Confirm that the cable thickness is as specified in the power sources specification.(Particularly note the relation between cable length and thickness.)

8) Never fail to equip a leakage breaker where it is wet or moist.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normalfunction of a overload protection device.


Installation

Checking the Drainage

Water Quality

Checking the Drainage- Spray one or two glasses of water upon theevaporator.

- Ensure that water flows drain hose of unit withoutany leakage.

The standards for cooling water quality

The standards for adding water quality

Index

PH[25°C] 6.5~8.0 O OElectric cOnductivity[25°C](µs/cm) Below 800 O OChlOride iOn(mgCl-/L) Below 200 OSulfate iOn (mgSO4

2-/L) Below 200 OAcid cOnsumptiOn[PH4.8](mgCaCO3/L) Below 100 OCalcium hardness(mgCaCO3/L) Below 150 OTurbidity Below 20 O OFe(mgFe/L) Below 1.0 O OAmmOnium iOn(mgNH4+/L) Below 1.0 OIOnic phases silica(mgSiO2/L) Below 50 OSaturatiOn index 0.0~1.0 O O

Item StandardsThe influence of water quality

Corrosion The formation of scale

StandardItem

ReferenceItem

Index

PH[25°C] 6.5~8.0Electric conductivity[25°C](µs/cm) Below 200Chloride ion(mgCl-/L) Below 50Sulfate ion (mgSO4

2-/L) Below 50Acid consumption[PH4.8](mgCaCO3/L) Below 50Calcium hardness(mgCaCO3/L) Below 50Turbidity Below 50Fe(mgFe/L) Below 50Ammonium ion(mgNH4

+/L) Below 50Ionic phases silica(mgSiO2/L) Below 50

Item Standards

Standard Item

Reference Item


Circuit Breaker

Installation

AirConditioner

Main power source

Circuit BreakerUse a circuit breakeor time delay fuse.

Use a recognized circuit breaker between the power source and the unit.A disconnecting device to adequately disconnect all supply lines must be fitted.

Capacity of the Circuit Breaker must lie between MCA and MOP

- MCA = 1.25 x Current of Motor

- MOP = 2.25 x Current of Motor

P/No.: MFL39192001 MSZAF0200

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