P/NO : MFL69717902INSTALLATION MANUALAIRCONDITIONERwww.lg.comPlease read this installation manual completely before installing the product.Installatio
10ENGLISHOpening shutoff valve1 Remove the cap and turn the valve counter clockwise with thehexagon wrench.2 Turn it until the shaft stops.Do not appl
11ENGLISH1 Always use the nitrogen.(not use oxygen, carbon dioxide, anda Chevron gas): Please use the following nitrogen pressure0.02MPa(2.9psi) Oxyg
12ENGLISHType of HR UnitSelect an HR unit according to the number of the indoor units to be in-stalled. HR units are classified into 3 types by the nu
13ENGLISH- 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/cm2(0.284
Refrigerant piping systemRefrigerant Pipe ConnectionExample : 12 Indoor Units connectedⒶ : Outdoor UnitⒷ : Y branchⒹ : Indoor UnitⒼ : HeaderⒽ : HR Uni
15ENGLISHY branch, Header and HR unit connection patternPattern 1Pattern 2Pattern 3HR1HR114.5kW(48kBtu/h)14.5kW(48kBtu/h)14.5kW(48kBtu/h)14.5kW(48kBtu
16ENGLISH• Keep the 40m(131ft) distance from the first branch to the farthest in-door.1) under 40m(131ft)Keep the sum of indoor capacity under 58kW(19
17ENGLISH• When the number of indoor units to be connected to the branchpipes is less than the number of branch pipes available for connec-tion then c
18ENGLISH[Unit:mm(inch)]Leak testLeak test should be made by pressurizing nitrogen gas to 3.8MPa(551.1psi). If the pressure does not drop for 24 hours
19ENGLISHBe sure to give insulation work to refrigerant piping by covering liquidpipe and gas pipe separately with enough thickness heat-resistant pol
2ENGLISH• Do not cool excessively indoors. This may be harmful for your healthand may consume more electricity.• Block sunlight with blinds or curta
20ENGLISHABEBIABDC1m1mDFGBGDBHIJAⒶ SleeveⒷ Heat insulating materialⒸ LaggingⒹ Caulking materialⒺ BandⒻ Waterproofing layerⒼ Sleeve with edgeⒽ Lagging
21ENGLISHSide panelWARNINGThe temperature sensor for outdoor air should not be exposed todirect sunlight.- Provide an appropriate cover to intercept d
22ENGLISH- Use a separate power supply for the Outdoor Unit and Indoor Unit.- Bear in mind ambient conditions (ambient temperature,direct sun-light, r
23ENGLISHCAUTIONBe sure to turn off outdoor unit power before installation.!Checking the setting of outdoor unitsChecking according to dip switch sett
24ENGLISH3) Selection of the model of the HR unit(For 2 branches)PRHR022(A)(For 3 branches)PRHR032(A)(For 4 branches)PRHR042(A)Initial Setting1 branch
25ENGLISH3 SW01M/SW03M/SW04M (Dip S/W and tact S/W formanual valve addressing) 1) Normal setting (Non-Zoning setting)- Set the address of the valve o
26ENGLISHFlow chart of auto addressing for pipe detectionCompletion of auto pipe detectionAre the numberof indoor units connected to the outdoor unit
27ENGLISHIdentification of Manual Valve ID (Address)Method of checking the pipe detection resultat outdoor unit1) Wait for 5 minutes, after Pipe detect
28ENGLISHExample) Group number setting 1stnumber indicate the group number2nd number point out indoor unit numberODU.B ODU.A IDU.B IDU.A CEN.B CEN.A D
29ENGLISHService PCB DIP switch on : No.5Select the mode using ‘▶’, ‘◀’ Button :“Func” Push the ‘●’ buttonSelect the Function using ‘▶’, ‘◀’ Button :“
3CAUTIONInstallation• Always check for gas (refrigerant) leakage after installation or repair of product.- Low refrigerant levels may cause failure of
30ENGLISHService unit PCB DIP switch on : No.5Select the mode using ‘▶’, ‘◀’ Button :“Func” Push the ‘●’ buttonSelect the Function using ‘▶’, ‘◀’ Butt
31ENGLISHError No. of CompressorError No.Error No. of UnitRepeat* Refer to the Indoor manual for some Indoor Error code.Self-Diagnosis FunctionError I
32ENGLISHDisplay Title Cause of Error5 0 *Omitting connection of R, S, T power of Outdoor Unit Omitting connection of outdoor unit5 1 *Excessive capac
33ENGLISHCalculate minimum room capacityCalculate room capacity by regarding a portion as one room or thesmaller room.- With partition and with openin
34ENGLISHCAUTION• Air conditioners should not be installed in areas wherecorrosive gases, such as acid or alkaline gas, are produced.• Do not install
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4ENGLISHThe foundation must be level evenOutdoor unit foundation workAvoid short circuits and ensure sufficient space is allowed for serviceInstallatio
5ENGLISHAir inlet grille500mm(19-11/16inch)[Unit:mm(inch)]Turn the air outlet side toward thebuilding's wall, fence or windbreak screen.WARNINGFi
6ENGLISH• The following values are the least space for installation. If any servicearea is needed for service according to field circumstance, obtaine
7ENGLISH2. Collective installationUnit:mm(inch)Unit:mm(inch)LH1000 (39-1/4) or more300(11-13/16)or more100(3-15/16)or more500(19-5/8)or lessLH1250(49-
8ENGLISH• When carrying the suspended, unit pass the ropes between legs ofbase panel under the unit.• Always lift the unit with ropes attached at four
9ENGLISHUnit : mm(inch)200 (7-7/8)Nut75 (3)75 (3)200 (7-7/8)Spring washerFrameAnti-vibrationmaterialsFour bolt are required3 thread ridgesH-BeamConcre
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