P/NO : MFL67221416INSTALLATION MANUALAIRCONDITIONERwww.lg.comPlease read this installation manual completely before installing the product.Installatio
10ENGLISHBurrs removal- Completely remove all burrs from the cut cross section of pipe/tube.- Put the end of the copper tube/pipe to downward directio
11ENGLISHRefrigerant piping on three principlesDrying Cleanliness AirtightShould be no moistureinsideNo dust inside.There is no refrigerantleakageItem
12ENGLISHType of HR Unit Select an HR unit according to the number of the indoor units to be in-stalled. HR units are classified into 3 types by the n
13ENGLISHGas pipe Ø15.88 (5/8)Liquid pipe Ø9.52 (3/8)Brazing Type 1234Remove caps onThe brazing part.Liquid pipeLow pressure gas pipeHigh pressure gas
- Pipe connections can be done on the front side or on the side accord-ing to the installation environments.- Be sure to let 0.2kgf/cm2Nitrogen flow i
15ENGLISHMethod of drawing out pipes on the bottom side- Drawing out common pipe through side panelLiquid pipeLow Pressure Gas pipeHigh PressureGas pi
16ENGLISHRefrigerant pipe diameter from outdoor unit to firstbranch. (A)Y branch, Header and HR unit connection patternUpwardoutdoorunit totalcapacity
17ENGLISHOutdoor unit ConnectionIndoor Unit ConnectionIndoor Unit connecting pipe from branch (a,b,c,d,e,f)Indoor Unit capacity[kW(Btu/h)]Liquid pipe[
18ENGLISHPipe Connection Method/Precautions for Series connections between Outdoor units- Separate Y branch joints are needed for series connections b
19ENGLISHhh 0.2mToward indoor unitToward indoor unitOil Trap(Example 3)The amount of RefrigerantThe calculation of the additional charge should take i
2ENGLISHTIPS FOR SAVING ENERGYHere are some tips that will help you minimize the power consumptionwhen you use the air conditioner. You can use your a
20ENGLISH• Header should be insulated with the insulator in each kit.• Joints between branch and pipe should be sealed with the tape in-cluded in each
21ENGLISH[unit:mm]Leak testLeak test should be made by pressurizing nitrogen gas to 3.8MPa(38.7kgf/cm2). If the pressure does not drop for 24 hours, t
22ENGLISHBe sure to give insulation work to refrigerant piping by covering liquidpipe and gas pipe separately with enough thickness heat-resistant pol
23ENGLISHABEBIABDC1m1mDFGBGDBHIJAPenetrationsⒶ SleeveⒷ Heat insulating materialⒸ LaggingⒹ Caulking materialⒺ BandⒻ Waterproofing layerⒼ Sleeve with ed
24ENGLISHUX3UX2Main PCBNoise FilterExternal PCBTake care of the phase sequence of 3-phase 4-wirepower systemWARNINGThe temperature sensor for outdoor
25ENGLISHNOTE!• The figures are based on assumed length of parallel cabling upto 100m. For length in excess of 100m the figures will have tobe recalcu
26ENGLISHField WiringSingle outdoor unitR S T N Switch Fuse L N Communication Line (2 Wires Cable) Power Line (4 Wires Cable) Communication Line (3 Wi
27ENGLISHCAUTIONIt should be wiring power cables or communication cables toavoid interference with the oil level sensor. Otherwise, That oillevel sens
28ENGLISHSwitch for setup of HR UnitMain function of SW02M1 Selection of the method for addressing valves of an HR unit(Auto/Manual)4 Setting the Valv
29ENGLISHModels Gas Pipe Liquid pipeARBLB03321I.D9.52I.D12.753.6D.I25.9D.II.D9.52I.D12.7I.D6.35I.D12.733232174I.D25.441339083I.D15.88I.D19.05I.D12.7I.
3- Improper installation may cause the unit totopple and result in injury.• Do not install the product on a defective in-stallation stand.- It may cau
30ENGLISHManual pipe detection1 Enter the central control address into each indoor unit using itswired remote control.2 Turn No.1 of SW02M of HR unit
31ENGLISH- Above setup must be done for all HR unit valves.- The valve that is not connected with any indoor unit should be ad-dressed with any other
32ENGLISHMode Function Option Value ActionRemarks Content Display1 Content Display2 Content Display3 Content Display4 Implement Display5 InstallationS
33ENGLISHGroup recognizing the central controllerNo.0 group (00~0F)No.1 group (10~1F)No.2 group (20~2F)No.3 group (30~3F)No.4 group (40~4F)No.5 group
34ENGLISHCAUTION• Ask an authorized technician to setting a function.• If use a function, first install a Central controller.!CAUTION• Ask an authoriz
35ENGLISHSelf-Diagnosis FunctionError Indicator- This function indicates types of failure in self-diagnosis and occurrence of failure for air conditio
36ENGLISHDisplay Title Cause of ErrorOutdoor unit related error3 5 * Low Pressure of Master Outdoor Unit Low Pressure of Master Outdoor Unit3 6 *Maste
37ENGLISHHR Unit related error2 0 01 Searching pipe Error Failure of automatic addressing of valves2 0 1C + #HRHR unit1 Liqiud sensor error Liquid pip
38ENGLISH- With partition and without opening which serve as passage of air toadjoining roomCalculate refrigerant concentration Total amount of replen
39ENGLISH• Product Name : Air conditioner• Model Name :• Additional information : Serial number is refer to the bar code on the product.Product Sales
4ENGLISH• Use power cables of sufficient current carry-ing capacity and rating. - Cables that are too small may leak, gener-ate heat, and cause a fi
40ENGLISH
5ENGLISHTABLE OF CONTENTS2 TIPS FOR SAVING ENERGY2 IMPORTANT SAFETY INSTRUCTIONS6 INSTALLATION PROCESS6 OUTDOOR UNITS INFORMATION6 ALTERNATIVE REFRIGE
6ENGLISHINSTALLATION PROCESSOUTDOOR UNITS INFORMATIONALTERNATIVE REFRIGERANT R410AThe refrigerant R410A has the property of higher operating pressure
7ENGLISHSelect installation location of the HR unit suitable for following condi-tions - Avoid a place where rain may enter since the HR unit is for i
8ENGLISHDuring the installation of the unit, consider service, inlet, and outletacquire the minimum space as shown in the figures below.CategoryInstal
9ENGLISH• Install at places where it can endure the weight and vibration/noiseof the outdoor unit.• The outdoor unit supports at the bottom shall have
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