LG L5UC728FA2 Installation Manual Download

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Installation Manual

Flaring Work and Connection of Piping

2. Align the center of the pipings and sufficiently

tighten the flare nut by hand

3. Finally, tighten the flare nut with torque

wrench until the wrench clicks.

■

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

Gas side piping

B-UNIT

A-UNIT

Outdoor unit

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 diameter

Torque

Summary of Contents for L5UC728FA2

Page 1: ...ation 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 P NO 3828A20567K ...

Page 2: ...g pipe Setting 46 Air Purging and Evacuation 48 Test running 50 Optional Operation Ceiling Concealed Duct Type 51 Optional Operation Ceiling Cassette Type 55 Combination indoor units 58 Installation guide at the seaside 59 Level gauge Screw driver Electric drill Hole core drill ø70mm Horizontal meter Flaring tool set Specified torque wrenches 1 8kg m 4 2kg m 5 5kg m 6 6kg m different depending on ...

Page 3: ...ype more than 25cm more than 25cm more than 75cm more than 25cm Air Outlet Control cover Installation plate Type B screws Type A screw 6 EA Type A screw 8 EA Holder Remote Control more than 25cm more than 25cm more than 75cm more than 25cm Air Outlet Connection pipe Drain hose Connecting wire Control cover ...

Page 4: ...the instruction Safety Precautions WARNING 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 Use...

Page 5: ...age 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 Do not store or use flammable ga...

Page 6: ...ct 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 Cor...

Page 7: ...e indoor unit s 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 will be...

Page 8: ...ructure 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 easily obtained A place wher...

Page 9: ... 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 required Model With Distributor With Distributor L5UC7 28FA2 L5UC7 28FA3 L6UH7 28FA2 L8UC1 508FA1 L8UC10 08FA2 L8UH10 08FA2 L8UC10 08FA3 None Distr...

Page 10: ... finished check all joints Add refrigerant if piping over 7 5m as shown below non distributor type 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 Re...

Page 11: ...he drain hose in the direction of rear left or right Connecting pipe Connecting cable Tape Drain hose Connecting pipe Connecting cable Tape 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...

Page 12: ...r unit install 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 le...

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: ... the hole through the wall for piping connections must be done safely How to fix installation plate Drill the piping hole with a ø70mm hole core drill Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side Drill a hole in the wall 5 7mm 3 16 5 16 Indoor WALL Outdoor Standard Chassis Hook Installation Plate Type A Installation plate Left rear piping...

Page 15: ...ill be leveled 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 ...

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: ...t 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: ...e 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 Low...

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: ...a level gauge During 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 b...

Page 22: ...in is stored or vented 4 Avoid places where sulfurous acid gas or corrosive gas is generated 5 Avoid places near high frequency generators TQ TR 31 34mm TP TN TM 15mm 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 ...

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 fro...

Page 24: ...ogged part of the case in the direction to install before the installation 4 After locating the wired remote controller installation board at the desired location screw the unit firmly When there is a buried box install the wired remote controller board to fit the buried box Use the screw provided 5 After fixing the top part of the remote controller to the installation board as shown in beside pic...

Page 25: ...e long time 6 Use the connecting cable to connect the indoor unit and the remote controller 7 When the distance between the wired remote controller and the indoor unit is 10m and above use the extension cable When installing the wired remote controller do not bury it in the wall It can cause damage in the temperature sensor Do not install the cable to be 50m or above It can cause communication err...

Page 26: ...ti Type Air Conditioner Installation of Indoor Outdoor Unit Wiring Connection Open the control box cover and connect the Remote controller cord and Indoor power wires Remote Controller Cable Connecting Cable ...

Page 27: ...om front panel 2 Remove the Corner covers of the panel 3 Fit the panel on the unit by inserting hooks as shown in picture 4 Insert two screws on diagonal corners of panel Do not tighten the bolts completely The fixing screws are included in the indoor unit box Check the alignment of panel with the ceiling Height can be adjusted using hanging bolts as shown in picture Insert the other two screws an...

Page 28: ... indoor unit PCB The position marking on PCB is as Display connector CN DISP Vane control connector CN VANE 1 2 8 Close the cover for control box 9 Fit the link on the panel as shown in picture The link is included in the front panel unit box 10 Attach the other side of link on the filter guide of inlet grille Install the air inlet grille and filter on the panel Link Link Filter guide Screw CN VAN...

Page 29: ... 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 ...

Page 30: ...ll In this case add heat insulation material according to the following procedure Heat insulation material to be prepared Adiabatic EPDM or NBR with thickness 10 to 20mm Stick EPDM or NBR on all air conditioners that are located in ceiling atmosphere In addition to the normal heat insulation thickness more than 8mm for refrigerant piping gas piping thick piping and drain piping add further 10mm to...

Page 31: ...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 32: ...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 33: ...h clicks 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 diame...

Page 34: ...u h indoor unit to the outdoor unit of L8UC H 1008FA2 or L6UH728FA2 Use the Y Branch in case of connecting 30 kBtu h 36 kBtu h indoor units to the Liquid port of BD Unit Use the socket in case of connecting 30 kBtu h 36 kBtu h indoor units to the Gas port of BD Unit 5162A20011E Contained in the indoor unit package 5001A21007A Contained in the indoor unit package 5211A21343B Contained in the indoor...

Page 35: ...9 079 079 079 079 079 L8UC H 1008FA2 085 096 085 096 L6UH728FA2 079 079 Outdoor unit 48k Indoor Cassette 48k Indoor Duct a b c a b c L5UC728FA3 L8UC1008FA3 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 36: ...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 37: ... piping see figure below 2 Use this accessory only for LMNC486BRA0 and LMNC48GTMA 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 38: ...UH1008FA2 L8UC1008FA2 L8UC1008FA3 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 L5UC728FA2 3 L6UH728FA2 L8UC H 1008FA2 3 ...

Page 39: ...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 L8UC1008FA3 Outdoor unit 1Circuit Ø19 05 9 52 Ø19 05 9 52 2 Circuit Outdoor L8UH1008FA2 L8UC1008FA2 L8UC1008FA3 Outdoor L8UH1008FA2 L8UC1008FA2 ...

Page 40: ...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 L5UC728FA3 48k 24k Short tube in L5UC728FA1 Outdoor unit 1Circuit Ø19 05 9 52 Ø15 88 6 35 2 Circuit PMBD5420L CASE 6 1ROOM CYCLE L6UH728FA2 ...

Page 41: ...of Piping 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 42: ...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 43: ...NC48GTMA0 SHORT TUBE EXISTING IN THE INDOOR U NIT SHOULD NOT BE USED INDOOR UNITS LMNC486BRA0 LMNC48GTMA0 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 5410A20...

Page 44: ...ram Connect the wires 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 cord conne...

Page 45: ... 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 power so...

Page 46: ... 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 47: ... 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 48: ...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 49: ...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 50: ... 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 should be removed If the actua...

Page 51: ...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 52: ... 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 Maunfacture...

Page 53: ... 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 54: ... 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 kBtu h 23 CMM 173 173 175 175 170 155 BG 20 CMM 195 195 193 193 190 190 32 CMM 230 230 225 220 150 1 36 kBtu h 29 CMM 240 238 237 235 230 220 26 5 CMM 245 245 243 243 240 240 40 CMM 230 225 220 215 205 200 190 180 160 BR 48 kBtu h 35 CMM 250 245 240 235 230 220 215 210 200 30 CMM 255 ...

Page 55: ... 01 Remote Controller 02 Indoor 03 2TH 4 Press button to save or release 5 Press button to exit or system will automatically exit after 25 seconds without any input Therefore system will use value that sensed from indoor unit or remote controller Temperature sensor location Function 01 Remote controller Operation in remote controller Temperature sensor 02 Indoor unit Operation in indoor unit tempe...

Page 56: ...sing button to select Function code 05 3 Select ceiling height value by pressing button 01 Low 02 Standard 03 High 04 Super high Low Decrease the indoor airflow rate 1 step from standard level Standard Set the indoor airflow rate as standard level High Increase indoor airflow rate 1 step from standard level Super high Increase indoor airflow rate 2 steps from standard level 4 Press button to save ...

Page 57: ... set this function in case of non group control 1 Press the button for 4 seconds to enter the installer setting mode until timer segment display 01 01 2 Repeat pressing button to select Function code 07 3 Select Master Slave by pressing button 00 Slave 01 Master 4 Press button to save or release 5 Press button to exit or system will automatically exit after 25 seconds without any input ...

Page 58: ... O O 24 24 000 7 0 O O O 12 12 000 3 5 O O Artcool Mirror 18 18 000 5 3 O O O 24 24 000 7 0 O O O 12 12 000 3 5 O O O 18 18 000 5 3 O O O 24 24 000 7 0 O O O Ceiling Cassette 4Way 30 30 000 8 8 O O O 36 36 000 10 6 O O O 48 48 000 14 1 O O O 18 18 000 5 3 O O O 24 24 000 7 0 O O O High Static 30 36 30 000 8 8 O O O CeilingConcealed 36 000 10 6 O O O O O O Duct 48 48 000 14 1 12 12 000 3 5 O Low St...

Page 59: ...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...

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