LG MULTI V PLUS LRUC1008T1 Installation Manual Download Page 30

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Outdoor Unit

Refrigerant piping installation

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and

the unit may be damaged.

- After selecting diameter of the refrigerant pipe to suit total capacity of the Indoor Unit connected after

branching, use an appropriate branch pipe set according to the pipe diameter of the Indoor Unit and the
installation pipe drawing.

Product length

Distance between Outdoor Units

Product length

Distance between Outdoor Units

Unit: mm

= Product length (1,280) +

(distance between Outdoor Units)

Pipe length between Outdoor Units

(Gas pipe, Liquid pipe, High/Low Pressure Common pipe)

Summary of Contents for MULTI V PLUS LRUC1008T1

Page 1: ...vice com IMPORTANT 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 ...

Page 2: ...OF CONTENTS Safety Precautions 3 Installation Process 10 Outdoor Units Information 11 Select the Best Location 16 Installation Space 17 Lifting method 21 Installation 22 Refrigerant piping installation 26 Electrical Wiring 52 Test Run 71 Caution For Refrigerant Leak 79 ...

Page 3: ...o do Be sure to follow the instruction Installation Have all electric work done by a licensed electrician according to Electric Facility Engineering Standard and Interior Wire Regulations and the instructions given in this manual and always use a special circuit If the power source capacity is inadequate or electric work is performed improperly electric shock or fire may result Ask the dealer or a...

Page 4: ... at the specified place Improper installation may cause the unit to top ple and result in injury Do not install the product on a defective installation stand It may cause injury accident or damage to the product When installing and moving the air condition er to another site do not charge it with a different refrigerant from the refrigerant specified on the unit If a different refrigerant or air i...

Page 5: ... limit when the refrigerant leaks Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceed ed Should the refrigerant leak and cause the safety limit to be exceeded harzards due to lack of oxy gen in the room could result Operation Do not damage or use an unspecified power cord There is risk of fire electric shock explosion or injury Use a dedicated outlet...

Page 6: ...touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure Installation Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem...

Page 7: ...y result in degradation of capacity When installting the unit in a hospital com munication station or similar place provide sufficient protection against noise The inverter equipment private power generator high frequency medical equipment or radio com munication equipment may cause the air condition er to operate erroneously or fail to operate On the other hand the air conditioner may affect such...

Page 8: ... base collapses the air conditioner could fall with it causing property damage product failure or personal injury Install and insulate the drain hose to ensure that water is drained away properly based on the installation manual A bad connection may cause water leakage Be very careful about product transportation Only one person should not carry the product if it weighs more than 20 kg Some produc...

Page 9: ...uring and after operation It can cause a burn or frostbite Do not operate the air conditioner with the panels or guards removed Rotating hot or high voltage parts can cause injuries Do not directly turn off the main power switch after stopping operation Wait at least 5 minutes before turning off the main power switch Otherwise it may result in water leakage or other problems Auto addressing should...

Page 10: ...Installation of indoor unit Take account of gradient of drain piping Sleeve and insert work Make relationship between outdoor indoor remote controller And option connections clear Prepare control circuit diagram Preparation of contract drawings Indicate clearly who is to be responsible for switch settings Determination of division work The vacuum pump used must have a capacity of reaching at least...

Page 11: ...T1 LRUC808T1 LRUC1008T1 LRUC1008T1 LRUC1208T1 LRUC808T1 LRUC808T1 10 x 2 10 x 2 10 x 2 10 x 2 10 x 2 10 x 3 2 2 2 2 2 0 20 20 20 22 24 32 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 3 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x3 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4...

Page 12: ...1 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 3 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x3 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x3 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø22 2 7 8 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø38...

Page 13: ...4 26 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø3...

Page 14: ...61 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 300 661 4 x 2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 1280x1607x730 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 50 4x63 3x28 7 x2 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø38 1 11 2 Ø38 ...

Page 15: ... 50 4x63 3x28 7 x2 Ø12 7 1 2 Ø12 7 1 2 Ø12 7 1 2 Ø19 05 3 4 Ø19 05 3 4 Ø19 05 3 4 Ø28 58 1 1 8 Ø28 58 1 1 8 Ø28 58 1 1 8 Ø38 1 1 1 2 Ø38 1 1 1 2 Ø38 1 1 1 2 Unit System HP Model Product Charge kg CF Correction Factor kg Max Connectable No of Indoor Units Net Weight kg lbs Dimensions W x H x D mm inch Pipe Connections Liquid Pipes mm inch Gas Pipes mm inch 1 Outdoor Unit 2 Outdoor Unit 8 10 12 16 1...

Page 16: ...al from accessing the Outdoor Unit If installation site is area of heavy snowfall then the following directions should be observed Make the foundation as high as possible Fit a snow protection hood Select installation location considering following conditions to avoid bad condition when additionally performing defrost operation 1 Install the outdoor unit at a place well ventilated and having a lot...

Page 17: ...ox Front Side Rear Side A B C 900 mm or more Control box is of a open close type 250 mm or more 150 mm from the wall C A B C A B h H Front Side Rear Side C A B C Front Side Rear Side C A B C Front Side Rear Side C A B C A B Control Box Front Side Rear Side Front Side Rear Side Side view Top view Side view Top view C E D A B 250 mm or more 350mm or more at the coastal area 150 mm from the wall B A ...

Page 18: ...e 250 mm or more D E F Front view Side view E D F A B C A B C A B C A B C When unit is surrounded by walls 900 mm or more Control box is of a open close type 250 mm or more A B A B B B Front Side Rear Side A B B B Front Side Rear Side A B B B Front Side Rear Side Front Side Rear Side A B B B When there is an obstruction above the unit ...

Page 19: ...Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side Front Side Rear Side F...

Page 20: ...nowfall Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm always remove snow for operation 1 The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the product If width of the frame is wider than that of the product snow may accumulate 2 Don t install the suction hole and discharge hole of the Outdoor Unit facing to the...

Page 21: ... one person carry product if it is more than 20 kg PP bands are used to pack some products Do not use them as a mean for transportation because they are dangerous Do not touch heat exchanger fins with your bare hands Otherwise you may get a cut in your hands Tear plastic packaging bag and scrap it so that children cannot play with it Otherwise plastic packaging bag may suffocate children to death ...

Page 22: ...olt Installation Individual installation Example of collective installation Installation foot Location of anchor bolt 700 10 900 383 900 700 900 700 900 700 900 10 383 900 10 383 900 900 10 383 900 383 900 10 383 900 10 383 900 10 383 900 10 Half size ...

Page 23: ...re that anti vibration may be done in a wide area Pipe and wiring space in case of piping and wiring on the floor surface H Beam support Concrete base support G WARNING Be sure to install unit in a place strong enough to withstand its weight Any lack of strength may cause unit to fall down resulting in a personal injury Have installation work in order to protect against a strong wind and earthquak...

Page 24: ...ol 4 0kW 13 600 Btu h Gas pipe 5 8 Liquid pipe 3 8 Firmly hold copper tube in a bar or die as indicated dimension in the table above 4 Check Compare the flared work with figure below If flare is noted to be defective cut off the flared section and do flaring work again Main cause of gas leakage is defect in flaring work Carry out correct flaring work in the following procedure Pipe A mm Gas Liquid...

Page 25: ...ing Connection CAUTION Use two wrenches and tighten with regular torque 1 Use the heat insulation material for the refrigerant piping which has an excellent heat resistance over 120 C 2 Precautions in high humidity circumstance This air conditioner has been tested according to the ISO Conditions with Mist and confirmed that there is not any default However if it is operated for a long time in high...

Page 26: ...ation of the refrigerant piping has been completed Pipe joint auxiliary parts Securely perform welding by passing nitrogen through the service valve port Flare nut Loose or tighten flare nut by using the wrench with both ends Coat the flare connection part with oil for a refrigerator Cap Remove caps and operate valve etc After opera tion always reattach caps tightening torque of valve cap 25Nm 250...

Page 27: ...k part pressurize nitrogen gas by 2 94MPa 30kgf cm2 4 Continue vacuum work after the vacuum degree reaches to 5Torr 5 Open side bar with the hex wrench When connecting the pipes from the front of the outdoor unit remove part When connecting the pipes from the side of the outdoor unit remove part the whole Knock out part Sub Outdoor Unit Main Outdoor Unit Sub1 Outdoor Unit Sub2 Outdoor Unit Main Ou...

Page 28: ...Outdoor Unit Gas Pipe Main Outdoor Unit Gas Pipe Weld elbow while flowing nitrogen Ø 44 5 Ø 19 05 Ø 22 2 Ø 19 05 Ø 28 58 Ø 38 1 Ø 28 58 Y branch A B To outdoor unit To branch piping or indoor unit A B Facing upwards Facing downwards Within 3 Within 3 Viewed from point A in direction of arrow Within 10 Refrigerant piping installation 2 Outdoor Units 3 Outdoor Units CAUTION Both the High Low Pressur...

Page 29: ...y 9 The Multi V will stop due to an abnormality like excessive or insufficient refrigerant At such a time always properly charge the unit When servicing always check the notes concerning pipe length and amount of addi tional refrigerant at both locations 10 Never perform a pump down This will not only damage the compressor but also deteriorate the per formance 11 Never use refrigerant to perform a...

Page 30: ... the unit may be damaged After selecting diameter of the refrigerant pipe to suit total capacity of the Indoor Unit connected after branching use an appropriate branch pipe set according to the pipe diameter of the Indoor Unit and the installation pipe drawing Product length Distance between Outdoor Units Product length Distance between Outdoor Units Unit mm Product length 1 280 distance between O...

Page 31: ...58 5 199 600 Ø15 88 5 8 inch Ø31 8 11 4 inch 75 4 257 300 Ø19 05 3 4 inch Ø38 1 11 2 inch 75 5 257 600 Ø22 2 7 8 inch Ø44 5 13 4 inch Liquid pipe mm Gas pipe mm WARNING Install the same main pipe diameter as those connected after the initial branch where the pipe diameter connected after the initial branch Ex Where connecting the Indoor Unit to 24HP 67 2kW to the 120 Main pipe diameter of Outdoor ...

Page 32: ...nection branch pipe Pipe diameter E High Low Pressure Common pipe mm Ø19 05 3 4 inch Ø12 7 1 2 inch Ø28 58 11 8 inch Liquid pipe mm Gas pipe mm Connection branch pipe Main pipe diameter A Ø19 05 3 4 inch Ø38 1 11 2 inch Liquid pipe mm Gas pipe mm WARNING Main pipe must be always come out to direction of the Main Outdoor Unit in installation For installing the refrigerant pipe system between Outdoo...

Page 33: ...on pipe mm Ø19 05 3 4 inch Ø12 7 1 2 inch Ø28 58 11 8 inch Liquid pipe mm Gas pipe mm High Low Pressure Common pipe mm Ø19 05 3 4 inch Ø19 05 3 4 inch Ø38 1 11 2 inch Liquid pipe mm Gas pipe mm Connection branch pipe Connection branch pipe Pipe diameter E Connection branch pipe Main pipe diameter A Ø22 2 7 8 inch Ø44 5 13 4 inch Liquid pipe mm Gas pipe mm WARNING Main pipe must be always come out ...

Page 34: ...inch Ø31 8 11 4 inch 75 4 257 300 Ø19 05 3 4 inch Ø38 1 11 2 inch 75 5 257 600 Ø22 2 7 8 inch Ø44 5 13 4 inch Liquid pipe mm Gas pipe mm WARNING Install the same main pipe diameter as those connected after the initial branch where the pipe diameter connected after the initial branch Ex Where connecting the Indoor Unit to 24HP 67 2kW to the 120 Main pipe diameter of Outdoor Unit Ø 38 1 Gas pipe Ø 1...

Page 35: ...it 1st branch Indoor Units Sealing Main pipe diameter A Total piping length A a b c d e f 220m H 50m L 120m 15m Branch pipe can not be used after header Must be satisfied both conditions Caution Indoor Unit should be installed at lower position than the header Assume equivalent pipe length of Y branch to be 0 5m that of head er to be 1m calculation purpose Liguid pipe Ø9 52 3 8 inch Gas pipe Ø19 0...

Page 36: ...cted to the Indoor Unit is minimized Performance difference between Indoor Units may occur 10m or less Branch pipe can not be used after header 2 Outdoor Units Example 6 Indoor Units connected Outdoor Unit Header branch Indoor Units Sealing Connection branch pipe between Outdoor units ARBL202C Sub Outdoor Unit Connection branch pipe Pipe diameter E High Low Pressure Common pipe mm Ø19 05 3 4 inch ...

Page 37: ...Sub2 Outdoor unit Connection branch pipe Pipe diameter F High Low Pressure Common pipe mm Ø19 05 3 4 inch Ø12 7 1 2 inch Ø28 58 11 8 inch Liquid pipe mm Gas pipe mm High Low Pressure Common pipe mm Ø19 05 3 4 inch Ø19 05 3 4 inch Ø38 1 11 2 inch Liquid pipe mm Gas pipe mm Connection branch pipe Connection branch pipe Pipe diameter E Connection branch pipe Main pipe diameter A Total piping length A...

Page 38: ... after header WARNING Piping length after header branching a f It is recommended that difference of the piping length connected to the Indoor Unit is mini mized Performance difference between Indoor Units may occur Downward Indoor Unit total capacity kW Btu h 8 3 28 300 Ø9 52 3 8 inch Ø15 88 5 8 inch 17 8 60 700 Ø12 7 1 2 inch 9 52 3 8 inch Ø19 05 3 4 inch 27 9 95 200 Ø12 7 1 2 inch Ø25 4 1 inch 4...

Page 39: ...ch Liquid pipe mm Gas pipe mm Connection branch pipe Main pipe diameter A Ø19 05 3 4 inch Ø38 1 11 2 inch Liquid pipe mm Gas pipe mm 10m or less Refrigerant pipe diameter from branch to branch B C Downward Indoor Unit total capacity kW Btu h 8 3 28 300 Ø9 52 3 8 inch Ø15 88 5 8 inch 17 8 60 700 Ø12 7 1 2 inch Ø19 05 3 4 inch 27 9 95 200 Ø12 7 1 2 inch Ø25 4 1 inch 42 4 144 700 Ø12 7 1 2 inch Ø28 5...

Page 40: ...re Common pipe mm Ø19 05 3 4 inch Ø19 05 3 4 inch Ø38 1 11 2 inch Liquid pipe mm Gas pipe mm Connection branch pipe Connection branch pipe Pipe diameter E Connection branch pipe Main pipe diameter A Ø22 2 7 8 inch Ø44 5 13 4 inch Liquid pipe mm Gas pipe mm 10m or less Refrigerant pipe diameter from branch to branch B C Downward Indoor Unit total capacity kW Btu h 8 3 28 300 Ø9 52 3 8 inch Ø15 88 5...

Page 41: ... Unit Indoor Unit h 15m L l H h Must be satisfied both conditions Caution Indoor Unit should be installed at lower position than the header WARNING Piping length after header branching a f It is recommended that difference of the piping length connected to the Indoor Unit is minimized Performance difference between Indoor Units may occur Assume equivalent pipe length of Y branch to be 0 5m that of...

Page 42: ...utdoor Units 3 Outdoor Units Total piping length 220m Total piping length 220m Indoor Unit capacity kW Btu h 4 0 13 600 9 0 30 700 15 0 51 200 Ø6 35 1 4 inch Ø9 52 3 8 inch Ø9 52 3 8 inch Ø12 7 1 2 inch Ø15 88 5 8 inch Ø19 05 3 4 inch Liquid pipe mm inch Gas pipe mm inch 10m or less 10m or less H 50m L 120m h 15m L 120m Exception Wide Art Cool 4 0kW 13 600 Btu h Liquid pipe Ø9 52 3 8 inch Gas pipe...

Page 43: ...nary ventilation system or building ventilation system Limitation in piping work design for earthquake proof and prevention against thermal stress Total amount of refrigerant in the system 0 3 kg m3 Volume of the room at which Indoor Unit of the least capacity is installed Additional charge kg Product Charge kg Total liquid pipe m Ø22 2mm x 0 4 kg m x 0 3 kg m x 0 2 kg m x 0 12 kg m x 0 06 kg m x ...

Page 44: ...h and do not make the main pipe distribution at or after the fourth branch 2 Vertical Distribution Ensure that the branch pipes are attached vertically 3 The others Header Sub Main Sub Main 1st 1st 1st Main pipe Distribution 2nd 2nd 3rd Sub Main Sub Main Sub Main Sub Main 2nd Main pipe Distribution Sub Main 1st 3rd 3rd main pipe distribution 2nd Refrigerant piping installation ...

Page 45: ...ow There is no limitation on the joint mounting configuration If the diameter of the refrigerant piping selected by the procedures described is different from the size of the joint the connecting section should be cut with a pipe cutter Branch pipe should be insulated with the insulator in each kit When the number of pipes to be connected is smaller than the number of header branches install a cap...

Page 46: ...n each kit Joints between branch and pipe should be sealed with the tape included in each kit Any cap pipe should be insulated using the insulator provided with each kit and then taped as described above B Piched pipe Horizontal plane View from point B in the direction of the arrow Insulate the header using the insulation material attached to the branch pipe kit as shown in the figure Insulator In...

Page 47: ...ø9 52 ø9 52 ø9 52 ø6 35 ARBL052S ø15 88 ø15 88 ø15 88 ø12 7 ø12 7 ø9 52 ø9 52 ø9 52 ø6 35 ø6 35 ø19 05 ARBL102S ø15 88 ø15 88 ø15 88 ø12 7 ø12 7 ø12 7 ø12 7 ø9 52 ø9 52 ø6 35 ø19 05 ø19 05 ø28 58 ø25 4 ø28 58 ø25 4 ø15 88 ø15 88 ø12 7 ø15 88 ø12 7 ø9 52 ø9 52 ø6 35 ø12 7 ø12 7 ø19 05 ø19 05 unit mm ø44 5 ø38 1 ø31 8 ø44 5 ø38 1 ø44 5 ø38 1 ø22 2 ø19 05 ø22 2 ø19 05 ø15 88 ø15 88 ø6 35 ø9 52 ø12 7 ...

Page 48: ...Ø6 35 Ø15 88 Ø12 7 Ø28 58 Ø19 05 Ø15 88 Ø9 52 Ø6 35 Ø9 52 Ø12 7 Ø6 35 Ø15 88 Ø15 88 Ø19 05 Ø6 35 Ø9 52 Ø9 52 Ø6 35 Ø15 88 Ø19 05 Ø31 8 Ø38 1 Ø12 7 Models Gas pipe Liquid pipe OD19 05 15 88 12 7 OD12 7 9 52 OD19 05 15 88 12 7 OD12 7 9 52 OD38 1 34 9 28 58 OD19 05 15 88 OD28 58 22 2 OD12 7 9 52 OD28 58 22 2 OD12 7 9 52 OD28 58 22 2 OD12 7 9 52 4 branch ARBL054 7 branch ARBL057 4 branch ARBL104 7 bra...

Page 49: ...f the pressure has not be reduced after leaving for about one day after com pletion of nitrogen gas pressurization Note If the ambient temperature differs between the time when pressure is applied and when the pressure drop is checked apply the following correction factor There is a pressure change of approximately 0 1 kg cm2 0 01 MPa for each 1 C of temperature difference Correction Temp at the t...

Page 50: ...uum pump for 1hr to 100 7kPa vacuum drying If the system cannot be evacuated to 100 7kPa within 2 hrs repeat the steps of vacuum break and its drying Finally check if the vacuum gauge does not rise or not after maintaining the system in vacuum for 1 hr WARNING When installing and moving the air conditioner to another site recharge after perfect evacuation If a different refrigerant or air is mixed...

Page 51: ...ing part of heat insulation material with a finishing tape E D D B A C Power lines Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat resistant polyethylene so that no gap is observed in the joint between Indoor Unit and insulating material and insulating materials themselves When insulation work is insufficient there is...

Page 52: ...andard related to electrical equipment wiring regulations and guidance of each electric power company 2 Install the Outdoor Unit transmission line away from the power source wiring so that it is not affected by elec tric noise from the power source Do not run it through the same conduit 3 Be sure to provide designated grounding work to Outdoor Unit 4 Give some allowance to wiring for electrical pa...

Page 53: ...Outdoor Unit Outdoor Unit Indoor Unit Remote control Remote control Indoor Unit Indoor Unit Remote control Remote control Indoor Unit Indoor Unit Indoor Unit Indoor Unit 2 Core Shield Cable Multi Core Cable 2 Core Shield Cable Multi Core Cable 2 Core Shield Cable Multi Core Cable CAUTION Use the 2 core shield cables for transmission lines Never use them together with power cables Never use multi c...

Page 54: ...ed wiring use the terminal block for central control WARNING The temperature sensor for outdoor air should not be exposed to direct sunlight Provide an appropriate cover to intercept direct sunlight Noise Filter Magnetic contactor Main PCB Magnetic contactor Sub PCB Fuse Reactor Inverter Comp Interter Board Capacitor Cover Heatsink InverterComp Driver Control board for inverter fan Transformer Tra...

Page 55: ... Note 1 The figures are based on assumed length of parallel cabling up to 100m For length in excess of 100m the figures will have to be recalculated in direct proportion to the additional length of line involved 2 If the power supply waveform continues to exhibit some distortion the recommended spacing in the table should be increased If the lines are laid inside conduits then the following point ...

Page 56: ... of your governmental organization for technical standard related to electrical equipment wiring reg ulations and guidance of each electric power company Make sure to use specified wires for connections so that no external force is imparted to terminal connections If con nections are not fixed firmly it may cause heating or fire Make sure to use the appropriate type of overcurrent protection switc...

Page 57: ...Vcc GND Outdoor Unit Central Controller WARNING Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage Transmission disorder by noise effect and motor current leakage without connection to pipe Don t install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply Power supply Model Name Outdoor Indo...

Page 58: ...al Controller WARNING Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage Transmission disorder by noise effect and motor current leakage without connection to pipe Don t install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply Electrical Wiring Power supply Model Name Outdoor Indoor LRU 8...

Page 59: ... Unit Outdoor Unit Central Controller Main Outdoor Unit Main Outdoor Unit Sub Outdoor Unit The GND terminal is a terminal for the central controller not Ground Line WARNING Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage Transmission disorder by noise effect and motor current leakage without connection to pipe Don t install an individual switch...

Page 60: ...utdoor Unit Central Controller Main Outdoor Unit Main Outdoor Unit Sub 1 Outdoor Unit Outdoor Unit Sub 2 Outdoor Unit The GND terminal is a terminal for the central controller not Ground Line WARNING Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage Transmission disorder by noise effect and motor current leakage without connection to pipe Don t i...

Page 61: ...r and fuse with correct capacity Using fuse and wire or copper wire with too large capacity may cause a malfunction of unit or fire 1 Use a separate power supply for the Outdoor Unit and Indoor Unit 2 Bear in mind ambient conditions ambient temperature direct sunlight rain water etc when proceed ing with the wiring and connections 3 The wire size is the minimum value for metal conduit wiring The p...

Page 62: ...62 Outdoor Unit Electrical Wiring Location of setting Switch Sub1 2 PCB SW03M DIP switch LED Shows setting status Main PCB 7 Segments Shows setting status SW03M DIP switch ...

Page 63: ...nts R22 30HP Main model code Sub1 model code Sub2 model code total capacity 2 25 22 1 255 Main model code 1 255 Sub1 model code 1 255 Sub2 model code 5 40 HP number sum of main capacity and sub capacity 2 heat pump No display cooling only 25 normal 41 R410A model 22 R22 model Checking the setting of the sub unit It is displayed by 8 LED of the sub unit A set of two LED s represents 0 1 2 and 3 in ...

Page 64: ... length is extremely long use capacity up mode 7 8 6 5 4 2 1 3 ON OFF 2 Loss compensation Save mode Setting before applying the power When the installation condition is normal almost all cases use standard mode 7 8 6 5 4 2 1 3 ON OFF 1 Loss compensation Standard mode default data address 7 8 6 5 4 2 1 3 ON OFF 4 Instant indoor unit checking Cooling mode With dip switch setting as left side push ad...

Page 65: ...applying the power Set at the disabled unit All compressors are broken In case of all compressors of 1 unit failure backup operation is possible when 110k Series or more indoor units capacity is ON 1unit 70k or more 7 8 6 5 4 2 1 3 ON OFF 11 Backup operation Inverter comprssor backup Setting before applying the power Set at the unit of the inverter failure In case of inverter failure backup operat...

Page 66: ...set dip switch as the left side Setting before applying the power 7 8 6 5 4 2 1 3 ON OFF 3 The sequence of sub unit 3rd sub unit 7 8 6 5 4 2 1 3 ON OFF 4 Backup operation constant speed comp 1 backup Setting before applying the power Set at the unit of the constant speed comp 1 failure 7 8 6 5 4 2 1 3 ON OFF 5 Backup operation constant speed comp 2 backup Setting before applying the power Set at t...

Page 67: ...ike St in the 7segment When you turn both No 7 and 8 off at this time the test operation will start 3 Turn on to operation mode with all indoor devices selected Strong wind mode set temperature to 30 C for heating and 18 C for air con ditioning 4 When the compressor is normally operated with the operating logic the target frequency will be 30Hz and when operated for more than 7 minutes after step ...

Page 68: ...e will be disappeared when on off button is pressed on remote control ex Display of 01 02 15 means connection of 15 indoor units and auto addressing is completed normally Auto addressing start Waiting 3 minutes Power On LED 01K blinking Press SW02M for 5 sec 7 segment LED 88 Check the connections of transmission line Waiting about 15 minues 7 segment LED OFF OK NO NO YES YES Check outdoor PCB CAUT...

Page 69: ... and GND Turn the whole system on Set the group and Indoor Unit number with a wired remote control To control several sets of Indoor Units into a group set the group ID from 0 to F for this purpose B E F C D Vcc GND A Vcc GND C D Indoor unit Outdoor unit Central controller Simple central Control Terminal block of outdoor unit Outdoor Units Group recognizing the simple central controller No 0 group...

Page 70: ...f 01 03 05 07 09 11 13 15 17 19 21 23 PLASMA 2ndF 2ndF Using the wired remote controller 1 Press Program button and Set Clr button at the same time for 3 seconds 2 The current group and the indoor unit numbers are indicated on the 88 of the wired remote control 3 Set numbers by using the temperature adjust key 4 Press Program button and Set Clr button at the same time for 3 seconds 5 If transmit r...

Page 71: ...re no error messages in the display of Indoor Units or remote controls and LED in Outdoor Units Checks Before Test Run CAUTION when cutting main power of the Multi V Always apply main power of the outdoor unit during use of product cooling season heating season Always apply power 6 hours in advance to heat the crank case heater where performing test run after installation of product It may result ...

Page 72: ... ventilation around outdoor heat exchanger Bad connector contact Coil failure LEV clogged LEV clogged Check resistance between terminals and chassis Check resistance between terminals and chassis Check wiring R S T sequence or lnter change last two phase connection Check the outdoor fan operation after being turned the Outdoor Unit off for some time Remove obstacles around the Outdoor Unit Check c...

Page 73: ...scharge temperature of main outdoor unit constant speed com pressor High pressure of main outdoor unit Low pressure of main outdoor unit Air temperature sensor of indoor unit is open or short Inlet pipe temperature sensor of indoor unit is open or short Failing to receive wired remote controller signal at indoor unit PCB Malfunction of drain pump Failing to receive outdoor unit signal at indoor un...

Page 74: ...or Unit rear side Current detect a CT sensor of Main Outdoor Unit Inverter compressor Discharge temperature sensor of Main Outdoor Unit Inverter compressor Outdoor Low Pressure sensor of Main Outdoor Unit Outdoor High Pressure sensor of Main Outdoor Unit Outdoor air sensor of Main Outdoor Unit Heat exchanger sensor of Main Outdoor Unit front side Suction temperature sensor of Main Outdoor Unit Dis...

Page 75: ...t of Sub1 Outdoor Unit air temperature sensor Open or short of Sub1 Outdoor Unit suction temperature sensor Open or short of Sub1 Outdoor Unit constant speed com pressor1 discharge temperature sensor Discharge temperature of Main Outdoor constant speed compressor 1 of Sub1 Outdoor Unit Discharge temperature of Main Outdoor constant speed compressor 2 of Sub1 Outdoor Unit Discharge temperature of M...

Page 76: ...on of R S T Power line of Sub2 Outdoor Unit If failing to receive signal of the central control part from the main control part Compressor Off by excessive increase of Sub1 Outdoor Unit High Pressure Sub1 Outdoor Unit constant speed compressor2 discharge temperature sensor Sub1 Outdoor Unit heat exchanger sensor front side Sub1 Outdoor Unit heat exchanger sensor rear side Sub1 Outdoor Unit liquid ...

Page 77: ...eakdown Failure of Sub1 constant speed compressor2 operation Comp locking Check Valve leakage comp dielectric breakdown Comp locking Check Valve leakage comp dielectric breakdown Comp locking Check Valve leakage comp dielectric breakdown Comp locking Check Valve leakage comp dielectric breakdown Comp locking Check Valve leakage comp dielectric breakdown Failure of Sub2 constant speed compressor1 o...

Page 78: ...78 Outdoor Unit Test Run Position of the LED01Y in inverter board ...

Page 79: ... limiting concentration Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken with out hurting human body when refrigerant leaks in the air The limiting concentration shall be described in the unit of kg m3 Freon gas weight per unit air volume for facilitating calculation Limiting concentration 0 30kg m3 R22 ISO5149 EN378 1 Outdoor unit No 1 system Fl...

Page 80: ...m Mechanical ventilator Countermeasure 1 Opening effective to ventilation Indoor unit Outdoor unit Indoor unit Smallest room R22 Refrigerant concentration kg m3 Total amount of replenished refrigerant in refrigerant facility kg Capacity of smallest room where indoor unit is installed m3 In case the result of calculation exceeds the limiting concentration perform the same calculations by shifting t...

Page 81: ...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 on the o...

Page 82: ...P No 3828A24002E Printed in Korea After reading this manual keep it in a place easily accessible to the user for future reference ...

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