LG L5UC728FA0 Installation Manual Download Page 59

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Summary of Contents for L5UC728FA0

Page 1: ... 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 TYPE Multi P NO 3828A20403Q ...

Page 2: ... Air Purging and Evacuation 46 Test running 48 Optional Operation Duct Type 49 Optional Operation CST Type 54 Combination indoor units 57 Installation guide at the seaside 58 o Level gauge o Screw driver o Electric drill o Hole core drill ø50mm o Horizontal meter o Flaring tool set o Specified torque wrenches 1 8kg m 4 2kg m 5 5kg m 6 6kg m different depending on model No o Spanner Half union o A ...

Page 3: ...r Unit Outdoor Unit more than 25cm more than 25cm more than 90cm more than 90cm Air Outlet Control cover Air filters Air outlet vents Air intake vents Remote Controller Remote Controller Air outlet vents Air intake vents Remote Controller Air filters Air intake vents Air Outlet vents ...

Page 4: ... the instruction Safety Precautions WARNING n Installation Install the panel and the cover of control box securely There is risk of fire or electric shock Always install a dedicated circuit and breaker Improper wiring or installation may cause fire or electric shock Use the correctly rated breaker or fuse There is risk of fire or electric shock Do not use a defective or underrated circuit breaker ...

Page 5: ... damage to the product Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furniture n Operation Do not store or ...

Page 6: ...To avoid vibration or water leakage Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors Don t let people to lift and transport the product Use fork lift Avoid personal injury Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corros...

Page 7: ...es the indoor unitʼs weight The place shall be able to inspect the unit as the figure The place where the unit shall beleveled The place shall allow easy water drainage Suitable dimension H is necessary to get a slope to drain as figure The place shall easily connect with the outdoor unit The place where the unit is not affected by an electrical noise The place where air circulation in the room wi...

Page 8: ...nit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method are adequate for the unit location Consult local codes regarding rooftop mounting There should not be any heat source or steam near the unit There should not be any obstacles to prevent the air circulation A place where air circulation in the room will be good A place where drainage can be...

Page 9: ... h3 h1 h2 A B Branch Pipe Main Pipe Distributor CAUTION Capacity is based on standard length and maximum allowance length is on the basis of reliability When outdoor unit is at higher elevation than the indoor units after 24m of vertical height 1 oil trap is Model With Distributor With Distributor With Distributor L5UC7 28FA0 L5UC7 28FA1 L8UC1 008FA1 L8UC1 508FA1 L6UH7 28FA0 None Distributor A Cir...

Page 10: ...inished check all joints n Add refrigerant if piping over 7 5m as shown below non distributor type n Add refrigerant if piping over 5m main pipe 7 5m branch pipe as shown below distributor type 24 kBtu h 15 88 6 35 30g m 48 60 kBtu h 19 05 9 52 50g m 90 kBtu h 25 4 12 7 120g m 12 18 kBtu h 12 7 6 35 20g m 24 30 36 kBtu h 15 88 6 35 30g m 48 kBtu h 19 05 9 52 50g m Main Pipe Branch Pipe Additional ...

Page 11: ...the upper side can cause drain pan to overflow inside the unit Drain hose Connecting cable Loop Gas side piping Liquid side piping Drain hose CAUTION If the drain hose is routed inside the room insulate the hose with an insulation material so that dripping from sweating condensation will not damage furniture or floors Foamed polyethylene or equivalent is recommended Installation of Indoor Outdoor ...

Page 12: ...tall the drain pipe Wrap the insulation material around the connecting portion 1 Overlap the connection pipe insulation material and the indoor unit pipe insulation material Bind them together with vinyl tape so that there is no gap 2 Wrap the area which accommodates the rear piping housing section with vinyl tape Recommended Insulation material Meterial FOAM PE Thickness 10mm Density less than 0 ...

Page 13: ...ng section Good case Press on the upper side of clamp and unfold the tubing to downward slowly Bad case Following bending type from left to right could cause problem of pipe damage Wrap with vinyl tape Drain hose Pipe Vinyl tape wide CAUTION Installation Information For right piping For right piping follow the instruction below Installation of Indoor Outdoor Unit ...

Page 14: ...lets is through the walls typically Drilling the hole through the wall for piping connections must be done safely n How to fix installation plate Installation Plate Type A screw Installation plate Ø70mm Left rear piping Right rear piping C D B A Ø70mm Left rear piping Right rear piping B A D C Installation plate SR ST SU S3 Drill the piping hole with a ø70mm hole core drill Drill the piping hole a...

Page 15: ...eveled and that can support the weight of the unit A place where the unit can withstand its vibration A place where service can be easily performed CASE 1 POSITION OF SUSPENSION BOLT CASE 2 POSITION OF CONSOLE BOLT Unit mm Drainage hole A B C 1 3 mm D G H I E F M10 SP washer M10 washer M10 Nut X 8 X 4 Local supply X 4 M10 Nut M10 SP washer M10 washer X 4 X 4 Local supply X 8 18 kBtu h 932 880 355 ...

Page 16: ...pring washers 1 Set anchor Old building New building 2 Plate washer 3 Spring washer 4 Nut 5 Suspension bolts Local supply Set anchor Plate washer M10 Spring washer M10 Nut W3 8 or M10 Suspension bolt W3 8 or M10 CAUTION Tighten the nut and bolt to prevent unit falling CAUTION 1 Install declination of the indoor unit is very important for the drain of the duct type air conditioner 2 Minimum thickne...

Page 17: ...pward flow or reverse flow in any part 5mm or thicker formed thermal insulator shall always be provided for the drain pipe Lay the drain hose with a downward inclination so water will drain out Install the P Trap or U Trap to prevent a water leakage caused by the blocking of intake air filter Applied U Trap Dimension CORRECT INCORRECT Upward routing not allowed Caution for gradient of unit and dra...

Page 18: ...ct Wiring Is the wiring connection correct Lock bolt Is the lock bolt of compressor loosened THERMAL INSULATION TEST AND CHECK Make sure that there is no clearance here Overlap with thermal insulator for piping Thermal insulator for refrigerant pipe Local supply Thermal insulator for piping Local supply Hose clip for thermal insulator Local supply Union for liquid pipe Refrigerant pipe and thermal...

Page 19: ...te controller side Main board CN REMO The maximum length of the cord is 100m If the length of the cord exceeds 50m use a wire size greater than 0 5mm2 Remote controller CN REMO Remote control box body Lever carefully the box open using a screw driver etc Front case The lower part Face of wall Upper notch Upper flange Under plate Remote control cord Remote control unit Tapping screw Local supply Lo...

Page 20: ...idify JET AUTO AUTO SWING OPERATION FAN SPEED Program set SUB FUNCTION SET TEMP Room Temp HI MED LO Heater Defrost Filter Preheat Out door Time Timer On Set no Time Off 01 03 05 07 09 11 13 15 17 19 21 23 Operat ion unit ZONE 1 2 3 4 Humidi fy JET AUTO AUTO SWIN G OPER ATION FAN SPEE D Program set SUB FUNCT ION SET TEMP Room Temp HI MED LO Heater Defrost Filter Prehea t Out door Time Time r On Set...

Page 21: ...ng the installation care should be taken not to damage electric wires The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions Ceiling board Level gauge Ceiling Unit mm 744 Unit size 744 Unit size 658 Hanging bolt 66 66 790 Ceiling opening 790 Ceiling opening 572 Hanging bolt 109 109 Unit mm 570 Unit size 570 Unit size 450 Hanging bolt 75 75 600 Ceil...

Page 22: ...places where sulfurous acid gas or corrosive gas is generated 5 Avoid places near high frequency generators Thoroughly study the following installation locations 1 In such places as restaurants and kitchens considerable amount of oil steam and flour adhere to the turbo fan the fin of the heat exchanger and the drain pump resulting in heat exchange reduction spraying dispersing of water drops drain...

Page 23: ... Select places that are not splashed with water Select control position after receiving customer approval The room temperature sensor is built in the indoor unit This remote controller equipped with liquid crystal display If this position is higher or lower display is difficult to see The standard height is 1 2 1 5m high Routing of the remote controller cord Keep the remote controller cord away fr...

Page 24: ... under plate on the wall Separate the under plate from Remote control box Fix the cord clamps on the wall by ø 3 tapping screws accessory Fix the remote control cord DISASSEMBLING ELECTRICAL WIRING n Remote Control Preparation OPTIONAL n WIRED REMOTE CONTROL INSTALLATION Wire and make sure that teminal numbers are matched on unit side and remote controller side The maximum length of the cord is 10...

Page 25: ...Outdoor Unit Installation Manual 25 n Wiring Connection Open the control box cover and connect the Remote controller cord and Indoor power Air inlet side view Control box cover Indoor power cord Remote controller cord Screws ...

Page 26: ...louver motor connector and display connector 6 After tightening these screws install the air inlet grille including the air filter Decorative panel fixing screws hexagon M5 screws Temporally fitting at 2 places Tightening about 10mm Install the panel after making sure that the piping side of the unit body matches the piping indication of the decorative panel Control box cover Piping side Inlet Gri...

Page 27: ...to the flexible drain hose and check the piping for leakage Be sure to check the drain pump for normal operating and noise when electrical wiring is complete When the test is complete connect the flexible drain hose to the drain port on the indoor unit Air conditioner unit Ceiling board Decorative panel Decorative panel Fit the insulator this part and be careful for cool air leakage Good example A...

Page 28: ...ith Mist and confirmed that there is not any default However if it is operated for a long time in high humid atmosphere dew point temperature more than 23 C water drops are liable to fall In this case add heat insulation material according to the following procedure Heat insulation material to be prepared Adiabatic glass wool with thickness 10 to 20mm Stick glass wool on all air conditioners that ...

Page 29: ...ion of pipe tube Put the end of the copper tube pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing 3 Putting nut on Remove flare nuts attached to indoor and outdoor units than put them on pipe tube having completed burr removal Not possible to put them on after flaring work 4 Flaring work Carry out flaring work using dedicated flaring tool for R 22 as ...

Page 30: ...3 Connect pipe to the service valve ball valve or short tube only 48k which is located 4 After completing the piping connection be sure to check if there is gas leakage in indoor and outdoor connection Vacuum drying After completing the piping connection execute vacuum drying for the connecting piping and the indoor unit The vacuum drying must be carried out using the service ports of both the liq...

Page 31: ... clicks n When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench CAUTION Use two wrenches and tighten with regular torque Torque wrench Liquid side piping Liquid side piping Gas side piping B UNIT A UNIT Outdoor unit mm inch kgf cm Ø6 35 1 4 180 250 Ø9 52 3 8 340 420 Ø12 7 1 2 550 560 Ø15 88 5 8 630 820 Ø19 05 3 4 990 1 210 Outside diam...

Page 32: ...246BHA0 LMNC H 246LTL A 0 LMNC H 246TFC A 0 LMNC H 246BYG0 Use shortube when install 48kBtu h ID Unit 100K OD UNIT OR L6UH728FA0 Use this Y branch when ID Unit is joined with BD Unit liquid side Use this connector when ID Unit is joined with BD Unit gas side 5162A20011E 5001A21007A 5001A21007B 5211A21343B Use this socket when ID Unit is joined with BD Unit gas side Use this connector at vacancy ga...

Page 33: ...8FA0 073 L5UC728FA0 079 079 L6UH728FA0 L8UC H 1008FA0 085 096 Outdoor unit 36K Indoor 48K Indoor 48K Indoor a b c a b c a b c L5UC728FA1 L8UC1008FA1 079 079 Outdoor unit 48K Indoor a b c Outdoor unit side Indoor unit side Outdoor unit side Indoor unit side a b c a b c ...

Page 34: ...it Gas side Liquid side Wiring A 30K Use socket Y connector A B No use C 12K normal normal C Room Indoor Unit Gas side Liquid side Wiring A 30K Use socket Y connector A B No use C 18K normal normal C Case 2 Case 5 Room Indoor Unit Gas side Liquid side Wiring A 36K Use socket Y connector A B No use C 18K normal normal C Case 3 Room Indoor Unit Gas side Liquid side Wiring A 30K Use socket Y connecto...

Page 35: ... piping see figure below 2 Use this accessory only for LMNC486BRA0 and LMNC486TDA C 0 model 3 Socket can be used for gas piping connection For example If Y connector is fitted in A B liquid piping then use socket for A keeping B closed or vice versa 4 Use only A or C terminal for wiring when Y connector is used see figure below Distributor Distributor 9 52 6 35 6 35 12 7 19 05 WIRING PIPING LIQUID...

Page 36: ...UH1008FA0 L8UC1008FA0 L8UC1008FA1 CASE 2 3ROOM CYCLE 12k 12k 12k 12k 12k 12k 12k 18k PMBD5440L PMBD5440L 1 Circuit 2 Circuit 12k 12k 24k PMBD5430L PMBD5430L 12k 18k 1 Circuit 2 Circuit 18k Ø12 7 6 35 Ø12 7 6 35 Ø12 7 6 35 Ø12 7 6 35 Ø15 88 6 35 Ø19 05 9 52 Ø19 05 9 52 Ø19 05 9 52 Ø19 05 9 52 Detail Work Models L5UC728FA0 1 L6UH728FA0 L8UC H 1008FA0 1 ...

Page 37: ...MBD5430L 18k 36k 1 Circuit 2 Circuit 48k 48k Short tube in 48k indoor unit 1 Circuit 2 Circuit Detail Work Ø15 88 6 35 Ø19 05 9 52 Ø19 05 9 52 Ø19 05 9 52 Ø19 05 9 52 Ø15 88 6 35 Ø12 7 6 35 48k 48k Short tube in L8UC1008FA1 Outdoor unit 1Circuit Ø19 05 9 52 Ø19 05 9 52 2 Circuit Outdoor L8UH1008FA0 L8UC1008FA0 L8UC1008FA1 Outdoor L8UH1008FA0 L8UC1008FA0 ...

Page 38: ...e in L5UC728FA0 Outdoor unit 1Circuit Ø19 05 9 52 Ø15 88 6 35 2 Circuit 48k 24k Short tube in 48k Indoor unit 1Circuit Ø19 05 9 52 Ø15 88 6 35 2 Circuit CASE 5 1ROOM CYCLE Only L5UC728FA1 48k 24k Short tube in L5UC728FA1 Outdoor unit 1Circuit Ø19 05 9 52 Ø15 88 6 35 2 Circuit PMBD5420L CASE 6 1ROOM CYCLE L6UH728FA0 ...

Page 39: ...Manual 39 CASE 1 CASE 2 24k 48k PMBD5430L PMBD5430L 18k 48k 1 Circuit Ø25 4 Ø12 7 Ø19 05 9 52 2 Circuit Detail Work Y branch 18k 30k 48k PMBD5440L PMBD5430L 18k 24k 24k 1 Circuit Ø25 4 Ø12 7 Ø19 05 Ø9 52 2 Circuit Detail Work Y branch Models L8UC1508FA1 ...

Page 40: ...it Ø19 05 60k cycle 90k cycle Ø19 05 Ø9 52 Ø9 52 Ø19 05 Ø25 4 Ø12 7 Ø9 52 5162A20011C Ø12 7 Ø9 52 Contained in the box of outdoor unit 5211A22157A Ø25 4 Ø19 05 Contained in the box of outdoor unit Brazing point Connection between BD and OD unit in case of L8UC1508FA1 In order to connect BD units to L8UC1508FA1 OD unit the following installation guide should be observed ...

Page 41: ...DA0 SHORT TUBE EXISTING IN THE INDOOR U NIT SHOULD NOT BE USED INDOOR UNITS LMNC486BEA0 LMNC486TDA0 DONOT REQUIRE BRANCH DISTRIBUTOR P NO 5211A21343E 2 INSTALLATION METHOD NAME SHORT TUBE P NO 5410A30055A NAME INSULATION TUBE P NO 5410A20111R NAME INSULATION BUTYL 3 AFTER ENVELOPING THE SHORT TUBE BY USING INSULATION TUBE 5410A30055A SHORT TUBE SHOUD BE SURROUNDED BY INSULATION BUTYL 5410A20111R I...

Page 42: ...s firmly so that not to be pulled out easily Connect the wires according to color codes by referring the wiring diagram CAUTION Provide a circuit breaker between power source and the unit as shown below CAUTION The power cord connected to the outdoor unit Main Power Cable should be complied with the following specifications Cable type approved by HAR or SAA The power connecting cable connected to ...

Page 43: ...ghtly to confirm that they do not move If they are loose the unit the unit will not operate normally or it can cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm that the cable thickness is as specified in the pow...

Page 44: ... glass of water on the evaporator 2 Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit Drain piping 1 The drain hose should point downward for easy drain flow 2 Do not make drain piping Downward slope Do not raise Accumulated drain water Tip of drain hose dipped in water Air Waving Water leakage Water leakage Ditch Less than 50mm gap Wa...

Page 45: ... drain hose and connecting cable from down to up 2 Secure the tapped piping along the exterior wall using saddle or equivalent In cases where the Outdoor unit is installed above the Indoor unit perform the following 1 Tape the piping and connecting cable 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 b...

Page 46: ...s stage Leakage test Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this service port with charge hoses CAUTION Be sure to use a manifold valve for leakage test If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept close Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cy...

Page 47: ...n 0 5torr of the gage pressure 2 When the desired vacuum is reached close the Lo knob of the manifold valve and stop the vacuum pump Finishing the job 1 With a service valve wrench turn the valve stem of liquid side valve counter clockwise to fully open the valve 2 Turn the valve stem of gas side valve counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas side ser...

Page 48: ...15 20 minutes then check the system refrigerant charge 1 Measure the pressure of the gas side service valve 2 Measure the temperature of the intake and discharge of air 3 The intake temperature the discharge temperature 8 C 4 For reference the gas side pressure of optimum condition is as below Cooling If the actual pressure are higher than shown the system is most likely over charged and charge sh...

Page 49: ...SIGNAL BR GND Connecting Cable Local Supply Connector Connector YL SIGNAL BR GND YL SIGNAL BR GND YL SIGNAL BR GND Remote Controller PCB Single Group Slide Switch2 Using the supplied Wired Remote Controller wire them like above Move slide switch 2 to Group position Ensure that the color of wire Open the rear cover of Remote Controller to set up the mode Selectable options are three as follows Remo...

Page 50: ...ed doesn t vary according to the opening Closing of dampers 3 Position V L Minimum E S P setting Fan speed is varied according to the state of dampers by micom Maximum 18k 24k 8mmAq 30k 36k 10mmAq 48k 15mmAq Minimum All 0mmAq Move the slide switch to set position Close the rear cover and check if it works normally CAUTION Select the position after checking duct work and E S P of the unit Maunfactu...

Page 51: ... no Time Off 01 03 05 07 09 11 13 15 17 19 21 23 1 2 3 4 FAN SPEED HI 2 Time SUB FUNCTION SET TEMP OPERATION AUTO SWING Preheat ZONE Operation unit Program set Room Temp MED LO AUTO JET Heater Defrost Filter Humidify Out door Timer On Set no Time Off 01 03 05 07 09 11 13 15 17 19 21 23 3 4 FAN SPEED HI 1 Timer 1 2 3 5 4 Timer Push the On Off button The unit will start Push the Timer and Wind butto...

Page 52: ... BK BL RD OR For Standard E S P 10mmAq High Static Motor Connection For 48K BE Chassis Model Static Pressure mmAq Setting Value 0 2 4 6 8 10 12 14 15 Capacity Step Hi Med Lo 16 5 CMM 235 230 225 215 180 18 kBtu h 14 5 CMM 245 238 235 230 215 BH 13 CMM 254 252 248 245 240 18 CMM 220 205 190 170 1 24 kBtu h 16 5 CMM 235 230 220 200 100 14 CMM 250 240 235 230 210 26 5 CMM 153 150 150 148 130 1 30 kBt...

Page 53: ... dbtain similar CFM at 15mmAq stastic pressure 4 If duct work is designed under External Static Pressure adjust the External Static Pressure applying air damper R S T N R S T N Outdoor Unit Power Supply Cable building Terminal block change Occurrence of strange noise from compressor No variation of pressure gages Troubles and Solutions Troubles Solutions Outdoor unit circuit Change the R S wires t...

Page 54: ... of main body and of remote controller sensor 3 Move the slide switch to set position 4 Close the rear cover and check if it works normally CAUTION Select the position after counselling with a customer In case of cooling mode room temperature is controlled by the main body sensor To control the room temperature by a wired remote controller install controller room temp sensor to sense the temperatu...

Page 55: ...e rear cover of the wired remote controller 3 Move the slide switch to the set position 4 Close the rear cover and check if it works normally Ceiling height Mode of slide switch Change of air volume Remark more than 3 3m High Ceiling Increasing 2 7 3 3m Standard Manufactured in less than 2 7m Low Ceiling Decreasing standard mode TH R14H SW TH REMO MAIN 2TH OP7 R18H R17H OP6 LO STAND SW HIGH HI R03...

Page 56: ...aximum length of connecting wire should be below 200m 25Ω on connecting each units Use a wire more than 0 5mm2 Operation unit ZONE 1 2 3 4 Humidify JET AUTO AUTO SWING OPERATION FAN SPEED Program set SUB FUNCTION SET TEMP Room Temp HI MED LO Heater Defrost Filter Preheat Out door Time Timer On Set no Time Off 01 03 05 07 09 11 13 15 17 19 21 23 Wired Remote Controller Slide Switch OP7 Remote Contr...

Page 57: ...0 5 3 O O O O O 24 24 000 7 0 O O O O 9 9 000 2 6 O Artcool Mirror 12 12 000 3 5 O O 18 18 000 5 3 O O 24 24 000 7 0 O O 24 24 000 7 0 O General 28 28 000 8 2 O 36 36 000 10 6 O 12 12 000 3 5 O 18 18 000 5 3 O 4Way 24 24 000 7 0 O 30 30 000 8 8 O 36 36 000 10 6 O 48 48 000 14 1 O 18 18 000 5 3 O O O O 24 24 000 7 0 O O O O 30 30 000 8 8 O O O 36 36 000 10 6 O O O O 48 48 000 14 1 O O BE chassis O ...

Page 58: ...ide 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 t...

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