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P/NO : MFL68907802

INSTALLATION MANUAL

AIR

CONDITIONER

www.lg.com

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.

Ɠ

 This product contains Fluorinated Greenhouse Gases. (R410A)

[Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V. 

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si, 

Gyeongsangnam-do, KOREA

Single Inverter Outdoor Unit

Original instruction

ENGLISH

IT

ALIANO

ESP

AÑOL

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERL

ANDS

POL

SKI

LIMBA ROMÂNĂ

1,MFL68907802(영)  17. 7. 21.  영영 7:18  Page 1

Summary of Contents for UU18W

Page 1: ...uture reference after reading it thoroughly ƓThis product contains Fluorinated Greenhouse Gases R410A Representative LG Electronics Inc EU Representative LG Electronics European Shared Service Center B V Krijgsman 1 1186 DM Amstelveen The Netherlands Manufacturer LG Electronics Inc Changwon 2nd factory 84 Wanam ro Seongsan gu Changwon si Gyeongsangnam do KOREA Single Inverter Outdoor Unit Original...

Page 2: ...eriorate if the air condition er is used for many hours Clean the air filter once every 2 weeks Dust and impurities collected in the air filter may block the air flow or weaken the cooling dehumidifying functions For your records Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes Write the model number and the serial number here Model number...

Page 3: ...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 Installation Do not use a defective or underrated circuit breaker Use the cor rectly rated breaker and fuse There is risk of fire or electric shock For...

Page 4: ...re injury Indoor outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire Safely dispose off the packing materials Like screws nails bat teries broken things etc after installation or svc and then tear away and throw away the pl...

Page 5: ...uch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure If strange sound smell or smoke comes from product Immediately turn the breaker off or disconnect the power supply cable There is risk of electric shock or fire Ventilate the product room from time to time when operating it together with a stove or heating element etc Oxygen d...

Page 6: ...e install safely at a place that can sufficiently endure the weight of the product If the strength is not sufficient the product may fall and cause injury Operation 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...

Page 7: ...tteries in the remote control with new ones of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or product failure Do not recharge or disassemble the batteries Do not dispose off batteries in 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 b...

Page 8: ...l Wiring 14 Connecting Cables between Indoor Unit and Outdoor Unit 16 Connecting the cable to Outdoor Unit 17 LEAKAGE TEST AND EVACUATION 17 Preparation 17 Leakage test 18 Evacuation 19 TEST RUNNING 21 INSTALLATION PI485 22 FUNCTION 22 Dip S W Setting 23 Forced Cooling Operation 24 Night Quiet Mode 24 Saving Power Consumption 25 Mode Lock 26 INSTALLATION GUIDE AT THE SEASIDE 26 SEASONAL WIND AND C...

Page 9: ... than 30cm Figure Figure Name Screw driver Electric drill Measuring tape Knife Hole core drill Spanner Torque wrench Multi meter Hexagonal wrench Ammeter Gas leak detector Thermometer Level Flaring tool set Name Installation Tools INSTALLATION ...

Page 10: ...act of snow or rain Select a place with no danger of snowfall or icicle drop Select a place without weak floor or base such as decrepit part of the building or with a lot of snow accumulation Install at a place with fluent water draining to prevent damage from localized heavy rain and avoid frequent flooded area Single Operation If installed tube is shorter than 7 5 m additional charging is not ne...

Page 11: ...d to indoor and outdoor units than 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 dedicated flaring tool for R 410A as shown below Firmly hold copper tube in a bar or clamp as indicated dimension in the table above Check Compare the flared work with figure below If flare is noted to be defective cut off t...

Page 12: ...ng Figure3 Plug the pipe through holes with putty or insulation material procured locally to stop up all gaps as shown in the figure 3 Continuous Torque Torque wrench wrench 250mm 250mm Torque wrench 250mm Torque wrench 250mm Torque wrench Outdoor unit Gas side piping Bigger Dia Liquid side piping Smaller Dia Tubing Cover Knock out Base pan Figure 2 Gas side piping Liquid side piping Drain hose Co...

Page 13: ...from down to up 2 Secure the taped piping along the exterior wall Form a trap to prevent water entering the room 3 Fix the piping onto the wall by saddle or equivalent Trap Trap Trap Trap Seal a small opening Seal a small opening around the pipings around the pipings with gum type sealer with gum type sealer Seal a small opening around the pipings with gum type sealant OUTDOOR UNIT OUTDOOR OUTDOOR...

Page 14: ...U30W 1 25A 1 L 2 N 1 L 2 N 3 1 L 2 N 1 L 2 N 3 POWER SUPPLY TO INDOOR UNIT POWER SUPPLY TO INDOOR UNIT UU18W UU18WE UU24WE UU24W UU30W Electrical Wiring Perform the electrical wiring work according to the electrical wiring connection All wiring must comply with local require ments Select a power source that is capable of sup plying the current required by the air condi tioner Use a recognized ELCB...

Page 15: ...CTIONAL AREA 0 75mm2 When the connection line between the indoor unit and outdooor unit is over 40m connect the telecommunication line and power line separately If the supply cord is damaged it must be replaced by a special cord or assembly available from the manufacturer of its service agent Precautions when laying power wiring Use round pressure terminals for connections to the power terminal bl...

Page 16: ...ten with earth screw CAUTION The circuit diagram is not subject to change without notice Be sure to connect wires according to the wiring diagram Connect the wires firmly so that They won t be pulled out easily Connect the wires according to color codes by referring the wiring diagram The Power cord connected to the unit should be selected according to the specifications on 13 page Make sure the r...

Page 17: ...ervice valve caps from both the gas and the liquid side on the outdoor unit Check that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage Leakage 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 3 8 MPa with dry nitrogen gas and close the cyl...

Page 18: ...are nut securely 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 Do a leakage test of all joints of the tubing both Indoor unit and outdoor unit and both gas and liquid side s...

Page 19: ...rry out the cooling operation firstly even during heating season If heating oper ation is carried out firstly it leads to the trouble of compressor Then attention must be paid Carry out the test run more than 5 minutes without fail Test run will be cancelled 18 minutes later automatically Is the circulation of air adequate Is the draining smooth Is the heat insulation complete refrigerant and drai...

Page 20: ... 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 name plate 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 b...

Page 21: ...INSTALLATION PI485 21 ENGLISH Fix the PI485 PCB as shown in below images For detailed installation method refer to PI485 Installation Manual UU18W UU24W UU30W INSTALLATION PI485 ...

Page 22: ...tep 2 Mode Lock Cooling Night Quiet Mode Step 1 Mode Lock Cooling Night Quiet Mode Step 2 Mode Lock Cooling Saving Power Consumption Step 1 Mode Lock Cooling Saving Power Consumption Step 2 Mode Lock Heating Saving Power Consumption Step 1 Mode Lock Heating Saving Power Consumption Step 2 When you set the dip switch you should turn off the circuit breaker or shut the power source of the product do...

Page 23: ...urned off 7 minutes from the start of the machine Then close the gas valve after Green LED on When the green LED of PCB is on compressor is going to be off because of low pressure You should return the Dip Switch to operate normally after finishing the operation Improper Pump down will lead to product turn off along with LED green red off with in 20 minutes from the initial start WARNING Pump Down...

Page 24: ...uiet Mode operation lowers the noise level of the outdoor unit by changing the Compressor s frequency and fan speed This function is operated all night long Setting Procedure 1 Set the Dip Switch as follow after shutting the power source down 2 Reset the power Saving Power Consumption with Mode Lock Saving Power Consumption step 1 Mode Lock Cooling Saving Power Consumption step 2 Mode Lock Cooling...

Page 25: ...he fan speed Power Night Quiet Mode will be stopped until fan speed Power is changed Mode Lock Setting Procedure 1 Set the Dip Switch as follow after shutting the power source down 2 Reset the power Mode Lock with Night Quiet Mode Saving Power Consumption with Mode Lock Mode Lock Cooling Night Quiet Mode step 1 Mode Lock Cooling Night Quiet Mode step 2 Mode Lock Cooling Saving Power Consumption st...

Page 26: ...it not to come in contact with snow directly If snow piles up and freezes on the air suction hole the system may malfunction If it is installed at snowy area attach the hood to the system Install the outdoor unit at the higher installa tion console by 50cm than the average snow fall annual average snowfall if it is installed at the area with much snowfall Where snow accumulated on the upper part o...

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