LG MULTI V WATER II ARWN Series Installation Manual Download

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Outside Unit

Refrigerant piping installation

1) Water pipe system diagram

• The water pressure resistance of the water pipe system of this product is 1.98MPa

• When the water pipe passes indoors, make sure to execute heat insulation on the pipe so that water drops do not form on

the outer side of the water pipe.

• The size of the drain pipe must be equal to or larger than the diameter of the connecting product.

- Always install a trap so that the drained water does not back flush.

• Always install a strainer (50Mesh or above) at the entrance of the water pipe. (When sand, trash, rusted pieces get mixed

into the water supply, it can cause problems to the product due to blocking)
- If On/Off valve is applied, by interlocking with outside unit, it can save the energy consumption of pump by blocking the

water supply to the outside unit not operating. Select appropriate valve and install on site if necessary.

• Install a pressure gauge and temperature gauge at the inlet and outlet of the water pipe.

• Flexible joints must be installed not to cause any leakage from the vibration of pipes.

• Install a service port to clean the heat exchanger at the each end of the water inlet and outlet.

• For the components of the water pipe system, always use components above the designed water pressure.

2) Water pipe connection

• The water pipe should be the same size of the connection on the product or more.

• If necessary install the insulation material in the water pipe inlet/outlet to prevent water drop, freeze and to save energy.

(Use the above 20mm thickness PE insulation material.)

• Tightly connect the socket to the water pipe refer to below table for recommended specification.

(Too much torque may cause the damage of the facility.)

Water pipe

outlet

Gate valve

Service port

Pressure gauge Temperature gauge

Service port

Strainer

Drain line

Condensed
water drain

Water pipe

Inlet

Do not directly connect the drain outlet to the water pipe outlet.
(It can cause problems to the product.)

Installation of water pipe

Summary of Contents for MULTI V WATER II ARWN Series

Page 1: ...rk 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 your set and retain it for future reference P NO MFL30215315 www lg com MODELS ARWN Series ENGLISH ITALIANO ESPAÑOL FRANCAIS DEUTSCH PORTUGUESE ...

Page 2: ... Location 11 Installation space 12 Water control 14 Lifting method 16 Installation 17 Refrigerant piping installation 21 Device protection unit 26 Refrigerant piping system 28 Y branch pipe and header branch pipe type 45 Leakage test and vacuum 47 Electrical Wiring 49 Test Run 67 Cooling tower applied method 76 Caution For Refrigerant Leak 77 Water Solenoid Valve Control 79 Variable Water Flow Con...

Page 3: ...mproperly electric shock or fire may result Ask the dealer or an authorized technician to install the air conditioner Improper installation by the user may result in water leak age electric shock or fire Always ground the product 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 For re installatio...

Page 4: ...plosion or injury 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 is mixed with the original refrigerant the refrigerant cycle may malfunction and the unit may be damaged Do not reconstruct to change the settings of the protection devices If the pressure switch...

Page 5: ...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 fre quency medical equipment or radio communication equip ment may cause the air conditioner to operate erroneously or fail to operate On the other hand the air conditioner may affect such equipment b...

Page 6: ...eans of transportation It is dangerous Do not touch the heat exchanger fins Doing so may cut your fingers When transporting the outside unit suspending it at the specified positions on the unit base Also support the outside unit at four points so that it cannot slip sideways Do not touch any of the refrigerant piping during and after operation It can cause a burn or frostbite Do not operate the ai...

Page 7: ...ntract 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 5 torr more than 1 hour Vacuum drying Recharge correctly as calculated in this manual and record the amount of added refrigerant Additional charge of refrigerant Make sure there are no gaps left between the facing materials used...

Page 8: ... Gas mm inch 22 2 7 8 22 2 7 8 28 58 1 1 8 28 58 1 1 8 28 58 1 1 8 Water Connecting Pipes Inlet PT32A internal thread PT32A internal thread PT40A internal thread PT40A internal thread PT40A internal thread Outlet PT32A internal thread PT32A internal thread PT40A internal thread PT40A internal thread PT40A internal thread Drain Outlet 20mm internal thread 20mm internal thread 20mm internal thread 2...

Page 9: ...r Units 64 64 64 Net Weight kg 223 223 154 223 223 154 223 223 154 Dimension Wx H x D mm 772 x 1 120 x 547 x 3 772 x 1 120 x 547 x 3 772 x 1 120 x 547 x 3 inch 30 4 x 44 1 x 21 5 x 3 30 4 x 44 1 x 21 5 x 3 30 4 x 44 1 x 21 5 x 3 Refrigerant Connecting Pipes Liquid mm inch 19 05 3 4 19 05 3 4 19 05 3 4 Gas mm inch 41 3 1 5 8 41 3 1 5 8 41 3 1 5 8 Water Connecting Pipes Inlet PT32A PT40A PT40A inter...

Page 10: ...gerant Connecting Pipes Liquid mm inch 19 05 3 4 19 05 3 4 Gas mm inch 41 3 1 5 8 41 3 1 5 8 Water Connecting Pipes Inlet PT40A PT40A PT40A internal thread PT40A PT40A PT40A internal thread Outlet PT40A PT40A PT40A internal thread PT40A PT40A PT40A internal thread Drain Outlet 20mm internal thread 20mm internal thread Range of Operation Water Temp Cooling C 10 45 10 45 Heating C 10 45 10 45 Unit 3...

Page 11: ...eat time of the indoor unit may be lengthened in case of installing the outside unit in winter at following location 1 Shade position with a narrow space 2 Location with much moisture in neighboring floor 3 Location with much humidity around 4 Location where water gathers since the floor is not even The refrigerant R410A has the property of higher operating pressure in comparison with R22 Therefor...

Page 12: ...and people Service area In case of the water pipe passing side product please make sufficient service place to avoid occurring between water pipe and product side Service area 20 100 350 772 Water pipe installation space H Beam Support unit mm 600 547 1120 100 100 20 Product Outside unit Top View Front View Service area Front Unit mm Top view Top view 100 350 772 600 547 20 Product Outside unit 20...

Page 13: ...13 ENGLISH Installation space Two Layer Installation Space required for two layer installation as shown below considering passage for air and people Service area H Beam Support 1120 100 100 100 Front View unit mm 1120 100 ...

Page 14: ...velocity will be unstable in the circulation pump efficiency will also decrease and may cause the piping vibration Therefore install the air purge where it may generate the air Choose the following anti freezing methods Otherwise it will be dangerous for the pipe to break in the winter Circulate the water with the pump before dropping the temperature Keep the normal temperature by boiler When the ...

Page 15: ...ing anti corrosion agent or removing the air can be very effective 3 In case of using the closed type cooling tower the cooling water and supplementing water must satisfy the water quali ty criteria of closed type system in the table 4 Supplementing water and supplied water must be supplied with tap water industrial water and underground water excluding filtered water neutral water soft water etc ...

Page 16: ...ck 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 When carrying in Outside Unit be sure to support it at four points Carryin...

Page 17: ...y cause unit to fall down resulting in a personal injury Have installation work in order to protect against a strong wind and earthquake Any installation deficiency may cause unit to fall down resulting in a personal injury Especially take care for support strength of the floor surface water drain processing processing of water flown out from the outside unit during operation and paths of the pipe...

Page 18: ...ing tool as shown below Firmly hold copper tube in a bar or die as indicated dimension in the table above 4 Check n Compare the flared work with figure below n 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 Gas Liquid Gas Liquid 5 6 19 100 1 2...

Page 19: ...form a gas leak check Tightening torque Union CAUTION Always use a charge hose for service port connection After tightening the cap check that no refrigerant leaks are present When loosening a flare nut always use two wrenches in combination When connecting the piping always use a spanner and torque wrench in combination to tighten the flare nut When connecting a flare nut coat the flare inner and...

Page 20: ...t However if it is operated for a long time in high humid atmosphere dew point tempera ture 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 EPDM Ethylene Propylene Diene Methylene over 120 C the heat resistance temperature Add the insulation over 10mm thickness at high humidity envi...

Page 21: ... tighten flare nut by using the wrench with both ends Coat the flare connection part with oil for the compressor Cap Remove caps and operate valve etc After opera tion always reattach caps tightening torque of valve cap 25Nm 250kg cm or more Don t remove the internal part of the port Service port Make the refrigerant pipe vacuum and charge it using the service port Always reattach caps after compl...

Page 22: ... 88 5 8 I D 28 58 1 1 8 I D 28 58 1 1 8 I D 28 58 1 1 8 I D 22 2 7 8 I D 22 2 7 8 110 4 11 32 120 4 23 32 120 4 23 32 I D 22 2 7 8 I D 12 7 1 2 I D 12 7 1 2 I D 12 7 1 2 I D 12 7 1 2 I D 9 52 3 8 I D 41 3 1 5 8 70 2 3 4 83 3 9 32 334 13 5 32 281 11 1 16 83 3 9 32 Outdoor units Model Gas pipe Liquid pipe I D 9 52 3 8 O D 19 05 3 4 I D 15 88 5 8 O D 12 7 1 2 I D 12 7 1 2 I D 6 35 1 4 X2 110 4 11 32 ...

Page 23: ...low pressure common pipe after removing burrs dusts and foreign material within the pipe Otherwise the product may not operate due to sludge within the pipe 3 For the working part leakage test apply the nitrogen gas pressure of 3 8MPa 38 7kgf cm2 4 The vacuum criteria is to maintain the vacuum level to less than 5 Torr 1 hour after reaching 5 Torr Execute the vacuum work again when it is below the...

Page 24: ...y Install a pressure gauge and temperature gauge at the inlet and outlet of the water pipe Flexible joints must be installed not to cause any leakage from the vibration of pipes Install a service port to clean the heat exchanger at the each end of the water inlet and outlet For the components of the water pipe system always use components above the designed water pressure 2 Water pipe connection T...

Page 25: ...N kgf N m kgf m N m kgf m 12 7 1 2 3 5 350 2 5 250 20 23 5 3 5 19 05 3 4 12 1200 2 5 250 20 2 115 11 5 25 4 1 11 2 1120 4 400 45 4 5 155 15 5 31 8 1 1 4 14 5 1450 6 5 650 87 5 8 75 265 26 5 38 1 1 1 2 16 5 1 7 9 5 0 95 155 16 350 35 5 50 8 2 21 5 2 2 13 5 1 4 255 26 600 61 Pipe thickness Shear stress Tensile stress Bending moment Torque ...

Page 26: ...at exchanger plays the role of the evaporator and at this time the temperature of the coolant side drops to drop the temperature of the heat water supply which can result in icing point in the water paths 4 And as the heating process progresses the water paths can be partially frozen to lead to damage in plate type heat exchanger 5 As a result of the damage of the heat exchanger from the freezing ...

Page 27: ...cting the wires The wiring method can differ by the manufacturer of the flow switch If necessary adjust the flow rate detection screw after consulting with an expert and adjust to the minimum flow rate range Picture 4 Minimum flow rate range of this product is 50 Adjust the flow switch to touch the contact point when the flow rate reaches 50 of the flow rate Reference flow rate 10HP 96LPM 20HP 192...

Page 28: ...r unit from the outside unit is 90m or above you must change the main pipe diameter according to the outside unit capacity in accordance with the following table This applies to both the liquid and gas pipes Total capacity of indoor units con nected to after branching kW 5 6 Ø6 35 Ø12 7 16 Ø9 52 Ø15 88 22 4 Ø9 52 Ø19 05 33 Ø9 52 Ø22 2 47 Ø12 7 Ø28 58 71 Ø15 88 Ø28 58 104 Ø19 05 Ø34 9 104 Ø19 05 Ø4...

Page 29: ...t branching that is the same as the main pipe diameter A Ex When connecting with 120 of the indoor unit to 10 HP 1 Outside unit main pipe diameter 22 2 Gas pipe 9 52 Liquid pipe 2 Pipe diameter after 1st branching by 120 indoor unit combination 28 58 Gas pipe 12 7 Liquid pipe Therefore set the pipe diameter B after 1st branching to 22 2 Gas pipe 9 52 Liquid pipe of main pipe diameter A When the pi...

Page 30: ... Ø9 52 12 7 Ø22 2 28 58 Ø19 05 v When the pipe diameter B connected after 1st branching is larger than the main pipe diameter A Install the pipe with the pipe diameter B after 1st branching that is the same as the main pipe diameter A Ex When connecting with 120 of the indoor unit to 10 HP 1 Outside unit main pipe diameter 22 2 Gas pipe 9 52 Liquid pipe 2 Pipe diameter after 1st branching by 120 i...

Page 31: ...l the unit so that the difference of the pipe dis tance connected to the indoor unit is minimized The large difference in pipe distance can cause performance difference between indoor units After the header branch you cannot use the Y branch and header branch When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above you must change the main pipe diamete...

Page 32: ... branch you cannot use the Y branch and header branch When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above you must change the main pipe diameter according to the outside unit capacity in accordance with the following table This applies to both the liquid and gas pipes Liquid pipe mm Gas pipe mm Low high pressure common pipe mm Ø9 52 12 7 Ø22 2 28 ...

Page 33: ...ch pipe between Outside units ARCNN20 10m or less H Below 50m Master Slave2 Slave1 L150m l 40m Below 2m Below 2m h1 h1 Below 2m h1 Ú Slave1 outside unit Connecting branch unit Ⓔ Pipe diameter between outside units E Ú Connecting branch pipe Ⓔ Header branch part Ⓑ Main pipe diameter A Liquid pipe mm Gas pipe mm Low high pressure common pipe mm Ø15 88 19 05 Ø34 9 41 3 Ø19 05 Ú Total refrigerant pipe...

Page 34: ...ed The large difference in pipe distance can cause performance difference between indoor units After the header branch you cannot use the Y branch and header branch When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above you must change the main pipe diameter according to the outside unit capacity in accordance with the following table This applies to...

Page 35: ...he pipe diameter B connected after 1st branching is larger than the main pipe diameter A Install the pipe with the pipe diameter B after 1st branching that is the same as the main pipe diameter A Ex When connecting with 120 of the indoor unit to 10 HP 1 Outside unit main pipe diameter 22 2 Gas pipe 9 52 Liquid pipe 2 Pipe diameter after 1st branching by 120 indoor unit combination 28 58 Gas pipe 1...

Page 36: ...its connected to after branching kW 5 6 Ø6 35 Ø12 7 16 Ø9 52 Ø15 88 22 4 Ø9 52 Ø19 05 33 Ø9 52 Ø22 2 47 Ø12 7 Ø28 58 71 Ø15 88 Ø28 58 104 Ø19 05 Ø34 9 104 Ø19 05 Ø41 3 Liquid pipe mm Gas pipe mm For the first branch pipe B use the branch pipe that fits the main pipe diameter A Longest pipe length Equivalent pipe length A B b A C e 150 m 175 m Longest pipe length after 1st branching B b C e 40 m Hi...

Page 37: ... After the header branch you cannot use the Y branch and header branch When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above you must change the main pipe diameter according to the outside unit capacity in accordance with the following table This applies to both the liquid and gas pipes Indoor unit connection Conditional Application Incase of D10 is...

Page 38: ...e the oil can be accumulated in the stopped outside unit If there is high low difference between the outside unit pipes oil can be accumulated to the outside unit on the lower location until the unit stops High Low difference between the outside units Location of main pipe 2m or less Location of main pipe 2m or less Oil trap Over 200mm Over 2m Location of main pipe 2m or less Oil trap Location of ...

Page 39: ... c d e x 0 022 CF 40 x 0 061 20 x 0 061 20 x 0 061 10 x 5 x 0 022 0 CF 5 98 kg a ø6 35 10m b ø6 35 10m c ø6 35 10m d ø6 35 10m e ø6 35 10m u Special condition In case of the No of CST TQ RAC SE ARTCOOL SF models are over than 50 of the connected indoor units when the total No of connected indoor units are over than 50 of the max connectable indoor units n Additional refrigerant charging amount kg ...

Page 40: ...ation position should be over 2m from the floor Wall mounted type Cassette type Adoption of ventilation system choose ordinary ventilation system or building ventilation system Limitation in piping work Prepare for earthquake and thermal stress Total amount of refrigerant in the system 0 44 kg m3 Volume of the room at which Indoor Unit of the least capacity is installed Note Fill in the f gas Labe...

Page 41: ...en use an adapter for connecting different diameters to connect the piping 7 Always observe the restrictions on the refrigerant piping such as rated length difference in height and piping diameter Failure to do so can result in equipment failure or a decline in heating cooling performance 8 A second branch cannot be made after a header These are shown by 9 The Multi V will stop due to an abnormali...

Page 42: ...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 to the u...

Page 43: ...ld be insulated with the insulator in 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 Pinched 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 ki...

Page 44: ...at insulation material with a finishing tape Power lines E D D B A C 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 a possibility...

Page 45: ...D 19 05 I D 15 88 O D 12 7 I D 9 52 I D 9 52 I D 15 88 I D 19 05 I D 12 7 I D 12 7 I D 19 05 I D 15 88 I D 12 7 I D 19 05 I D 28 58 I D 22 2 I D 19 05 I D 15 88 I D 12 7 I D 19 05 I D 22 2 O D 15 88 I D 9 52 I D 12 7 O D 12 7 I D 6 35 I D 9 52 I D 41 3 I D 38 1 I D 41 3 O D 34 9 I D 34 9 I D 34 9 I D 22 2 I D 15 88 I D 19 05 I D 22 2 I D 22 2 I D 19 05 I D 15 88 I D 12 7 I D 15 88 I D 19 05 I D 22...

Page 46: ... I D Ø9 52 I D Ø12 7 I D Ø6 35 O D Ø12 7 I D Ø9 52 I D Ø15 88 I D Ø12 7 I D Ø28 58 I D Ø19 05 I D Ø15 88 O D Ø28 58 I D Ø22 2 I D Ø25 4 I D Ø9 52 I D Ø6 35 I D Ø9 52 I D Ø12 7 I D Ø6 35 O D Ø12 7 I D Ø9 52 I D Ø15 88 I D Ø12 7 I D Ø28 58 I D Ø19 05 I D Ø15 88 O D Ø28 58 I D Ø22 2 I D Ø25 4 I D Ø9 52 I D Ø6 35 I D Ø9 52 I D Ø12 7 I D Ø6 35 O D Ø12 7 I D Ø9 52 I D Ø15 88 I D Ø15 88 I D Ø19 05 I D Ø3...

Page 47: ...and high low pressure common pipe The test result can be judged good if the pressure has not be reduced after leaving for about one day after comple tion 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 ...

Page 48: ...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 Scale Use a graviometer One that can measure down to 0 1kg If you are unable to prepare such a high precision gravimeter you may use a charge cylinder Vacuum should be done for...

Page 49: ... 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 Outside Unit 4 Give some allowance to wiring for electrical part box of Indoor and Outside Units because the box is some times removed at the time of service work 5 Never connect the main power source to terminal block of transmission line If connected electri...

Page 50: ...ound pressure terminal Power wire Use round pressure terminals for connections to the power terminal block Use the 2 core shield cables for transmission lines Never use them together with power cables The conductive shielding layer of cable should be grounded to the metal part of both units Never use multi core cable As this unit is equipped with an inverter to install a phase leading capacitor no...

Page 51: ...er system pass through the sub PCB for central control When connecting indoor unit with the shield cable ground at the grounding screw When connecting central controller with the shield cable ground at the grounding screw Refer to next page about the distance between main power cable and communication cable Front Panel Control Box and Wiring Location Installation Manual 51 ENGLISH ...

Page 52: ...e 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 must also ...

Page 53: ...et to disconnect each of indoor unit separately from the power supply u Wiring of Main Power Supply and Equipment Capacity Follow ordinance 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 connecti...

Page 54: ...nnection of Transmission Cable 1 Outside Unit 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 Install the main switch that c...

Page 55: ...s connected In series between the units Main Switch Main Switch IDU SODU DRY1 DRY2 GND INTERNET B A 12V Master Outside unit IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B B B B A A A A 12V Master Outside unit Pull Box Installer option Pull Box Installer option u Example Connection of Transmission Cable 2 Outside Units WARNING Indoor Unit ground Lines are required for pre...

Page 56: ...it Slave2 Outside unit IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B B B B B A A A A A 12V Master Outside unit Pull Box Installer option Pull Box Installer option u Example Connection of Transmission Cable 3 Outside Units WARNING Indoor Unit ground Lines are required for preventing electrica...

Page 57: ...e Connection of Transmission Cable 1 Outside Unit 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 Install the main switch th...

Page 58: ...series between the units Main Switch Main Switch IDU SODU DRY1 DRY2 GND INTERNET B A 12V Master Outside unit IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B B B B A A A A 12V Master Outside unit Pull Box Installer option Pull Box Installer option u Example Connection of Transmission Cable 2 Outside Units WARNING Indoor Unit ground Lines are required for preventing electri...

Page 59: ...e unit Slave2 Outside unit IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B A 12V IDU SODU DRY1 DRY2 GND INTERNET B B B B B A A A A A 12V Master Outside unit Pull Box Installer option Pull Box Installer option u Example Connection of Transmission Cable 3 Outside Units WARNING Indoor Unit ground Lines are required for preventing elect...

Page 60: ...tween indoor unit to outside unit STAR type Abnormal operation can be caused by communication defect when connection of communication cable is installed like below figure STAR type External wiring External wires should be connected as follows Main power cable Communication cable Solenoid valve control cable option flow switch communication cable option ڸ ڹ ں ...

Page 61: ...e dip switch is not set correctly the product may not operate properly SW01B SW02B 7 segment SW01B 1 2 3 4 5 6 7 ON SW02B 1 2 3 4 5 6 7 ON Order Number Item 1 Model code 2 Total capacity HP 3 2 Heat pump model 4 25 Normal mode display If the dip switch is set incorrectly it is not displayed 5 130 Model type Normal 380V Installation Manual 61 ENGLISH Model Code Capacity HP Refrigerant 133 8 R410A 1...

Page 62: ...Setting Remark Standard mode at shipping factory Standard Short Pipe Length Long Pipe Length 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON SW01B Setting SW02B Setting Remark Normal mode at shipping factory Slave1 outside setting at the 2units Slave2 outside setting at the 3units 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7...

Page 63: ... Mode 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON For water pipe Solenoid Valve 220V power Vacuum Mode Water Pipe Solenoid Valve 220V Functions 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON Dry contact Mode 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON n After operating the dip switch to set the additional function you must reset the power of the main PCB to refle...

Page 64: ...In replacement of the indoor unit PCB always perform auto address setting again If power supply is not applied to the indoor unit operation error occurs Auto addressing is only possible on the main PCB Auto addressing has to be performed after 3 minutes to improve communication u The Procedure of Automatic Addressing Auto addressing setting end Numbers of indoor unit connection set whose addressin...

Page 65: ...roup 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 Terminal block on the main PCB SODU IDU INTERNET DRY1 DRY2 B A B D A C GND 12V B A B A Group recognizing the simple central controller No 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 50 5F No 6 gro...

Page 66: ...ush button Setting Main PCB Dip SW of Master Outside Unit In case of no Cool Heat Selector connect signal terminal block as below figure And description Connect signal terminal block as below figure and description How to set mode without Cool Heat Selector Cooling Mode Setting GND Connection Off Open Heating Mode Setting GND Connection GND Connection Fan Mode Setting Off Open GND Connection Mode ...

Page 67: ... particles inside the pipes and execute an air purge to remove an air within the pipes to make the water supply smoother Clean all the strainers of water pipe including around outside units Execute the test of water supply system without operating the product Check whether outside unit inlet outlet flow rate complies to the product specification Standard Water volume is 96LPM based on 10HP and 196...

Page 68: ...ase heater of the compressor and let the refrigerant including the oil inside the compressor to evaporate Then the insulation resistance value will increase to more than 2 0 MΩ Check whether the liquid and gas pipes are open Precaution when blocking the water cooling type Multi V main power While using the product Air conditioning season Heating season always connect the main power of the outside ...

Page 69: ... be created 1 Before the season of use check below points Once a year 1 inspection on water quality to check if this is within the standard condition 2 Clean the strainer 3 Check if the flow is appropriate 4 Check if the operation environment is appropriate Pressure flow output temperature 2 Below procedure should be abided by in order to clean the panel heat exchanger Once every 5 years 1 Check i...

Page 70: ... density must be used Calcium chloride brine can cause corrosion on the plate type heat exchanger and must not be used If the anti freeze liquid is left as is it absorbs the moisture from the air to cause a drop in the density leading to freezing of plate type heat exchanger Therefore minimize the contact surface with the atmosphere and periodically measure the density of the brine to supplement t...

Page 71: ...s turned on Compressor maintenance by master outside unit high pressure switch Flow rate insufficiency or flow switch trouble of master outside unit Compressor maintenance by slave1 outside unit high pressure switch Flow rate insufficiency or flow switch trouble of slave1 outside unit Compressor maintenance by slave2 outside unit high pressure switch Flow rate insufficiency or flow switch trouble ...

Page 72: ... outside unit high pressure over rise Flow rate insufficiency or flow switch trouble of slave2 outside unit Compressor turned off due to master outside unit low pressure over drop Compressor turned off due to slave1 outside unit low pressure over drop Compressor turned off due to slave2 outside unit low pressure over drop Master outside unit inverter compressor current detection CT sensor disconne...

Page 73: ...sor dis connection or short circuit Slave2 outside unit Plate type heat exchanger temperature sensor dis connection or short circuit Master out side unit IGBT temperature sensor disconnection or short circuit Slave1 out side unit IGBT temperature sensor disconnection or short circuit Slave2 out side unit IGBT temperature sensor disconnection or short circuit Master outside unit power line phase mi...

Page 74: ... Sensor open or short Slave1 Outdoor Unit PFC CT Sensor open or short Slave2 Outdoor Unit PFC CT Sensor open or short Master outside unit inverter PCB input instant over current Peak exceeded Slave1 outside unit inverter PCB input instant over current Peak exceeded Slave2 outside unit inverter PCB input instant over current Peak exceeded 5 0 3 Slave2 outside unit 3 phase power missing 5 1 Over cap...

Page 75: ... compressor burn locking and over current Slave1 outside unit static speed compressor burn locking and over current Slave2 outside unit static speed compressor burn locking and over current Plate type heat exchanger freeze prevention error Water temperature sensor open short Communication error between main MICOM and sub MICOM 7 4 1 Master outside unit inverter PCB phase imbal ance 7 4 2 Slave1 ou...

Page 76: ...st side and 2nd side is main tained constantly Closed type cooling tower Heat source water of the cooling tower is supplied directly to the outside unit system Open type cooling tower Closed type cooling tower 1st side 2nd side Heat exchange When the open type cooling tower is used and the water supply is directly connected to the 2nd heat exchanger product damage by alien particle cannot be repai...

Page 77: ...ng procedure of 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 44kg m3 R410A Outside unit No 1 system F...

Page 78: ...mechanical ventilator Reducing the outside refrigerant qty Pay a special attention to the place such as a basement etc where refrigerant can stay since refrigerant is heavier than air Outside unit Indoor unit Smallest room R410A 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 ...

Page 79: ...tch Solenoid Valve Water Out Water In L1 L2 3 A 3 B 4 A 4 B CN_26 CN_24 CN_22 MAIN PCB C_Box Flow Switch Solenoid Valve Water Out Water In L1 L2 3 A 3 B 4 A 4 B Water Solenoid Valve Control Set the dip switch refer to Fig 1 and turn on the power when you individual control for water solenoid valve control Central Control Use DDC Port Individual Control Use 220V Out Port ...

Page 80: ...onnect a signal cable DC 0 10V of water flow control valve to CN_AO AO_02 B GND B of VWFC 11 Connect a power cable AC 24V of water flow control valve to the terminal block 2Pin Yellow terminal block Max current 0 42A 12 Connect the RS 485 communication cable to CN_COMM BUS_A BUS_B of VWFC 13 Set up the main function Dip S W of VWFC PCB 14 Set up the Dip SW of outdoor main PCB 15 Turn on the main p...

Page 81: ......

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LG MULTI V WATER II ARWN Series, Installation Manual

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