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LG ARWB80LA2 Installation Manual

Multi v water ii system, outside unit r410a, arwb series
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Outside Unit
INSTALLATION MANUAL
MODELS: ARWB Series
website http://www.lgservice.com
System
R410A
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.
LG

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Summary of Contents for LG ARWB80LA2

  • Page 1 website http://www.lgservice.com System Outside Unit R410A INSTALLATION MANUAL MODELS: ARWB Series 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. •...

  • Page 2: Table Of Contents

    ARWN Series Outside unit Installation Manual TABLE OF CONTENTS Safety Precautions ......................3 Installation Process ......................7 Outside units Information ....................8 Environment-friendly Alternative Refrigerant R410A ............9 Select the Best Location....................9 Installation space ......................11 Water control .........................13 Lifting method.........................15 Installation ........................16 Refrigerant piping installation ..................20 Device protection unit .....................30 Refrigerant piping system ....................32 Y branch pipe and header branch pipe type ..............41...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions When installing and moving the air condition- Do not reconstruct to change the settings of er to another site, do not charge it with a the protection devices. different refrigerant from the refrigerant specified on the unit. • If a different refrigerant or air is mixed with the original •...
  • Page 5 Safety Precautions Keep level even when installing the product. Do not install the unit where combustible gas may leak. • To avoid vibration or water leakage. • If the gas leaks and accumulates around the unit, an explosion may result. Use power cables of sufficient current Do not use the product for special purposes, carrying capacity and rating.
  • Page 6 Safety Precautions Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 20 kg. • Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous. •...

  • Page 7: Installation Process

    Select Installation Location Installation Process Indicate clearly who is to be responsible for switch settings Determination of division work Make relationship between outside, indoor, remote controller, and option connections clear. Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient The foundation must be level even Sleeve and insert work Outside unit foundation work...

  • Page 8: Outside Units Information

    3)Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input. Power Supply: Outside Unit (3Ø, 380 ~ 415V, 50Hz) I Heat pump Unit 1 Unit 2 Unit System(HP) Model ARWB80LA2 ARWB100LA2 ARWB200LA2 ARWB300LA2 ARWB80LA2 ARWB100LA2 ARWB200LA2 ARWB200LA2...

  • Page 9: Environment-Friendly Alternative Refrigerant R410A

    Environment-friendly Alternative Refrigerant R410A Environment-friendly Alternative Refrigerant R410A • The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this character- istic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.
  • Page 10 Environment-friendly Alternative Refrigerant R410A I Select installation location of the HR unit suitable for following conditions • Avoid a place where rain may enter since the HR unit is for indoor. • Sufficient service space must be obtained. • Refrigerant pipe must not exceed limited length. •...

  • Page 11: Installation Space

    Installation space Installation space Individual Installation Required the minimum space as shown below for installation and check. If the space is not fit on this drawing, consult with LG. (unit : mm) : Service area Product (Outdoor unit) Water pipe...
  • Page 12 Installation space Two Layer Installation Space required for two layer installation as shown below considering passage for air and people. : Service area (unit : mm) H-Beam Support <Front View> Outside Unit...

  • Page 13: Water Control

    Water control Water control Water control • Keep the water temperature between 10~45°C. Other it may cause the breakdown. - Standard water supply temperature is 30°C for Cooling and 20°C for heating. • Properly control the water velocity. Otherwise it may cause the noise, pipe vibration or pipe contraction, expansion according to the temperature.
  • Page 14 Water control Standard table for water purity control The water may contain many foreign substances and hence may influence the performance and lifetime of the prod- uct due to the corrosion of the condenser and water pipe. (Use water source that complies with the below standard table for water purity control.) If you use water supply other than the tap water to supply the water for the cooling tower, you must do a water quality inspection.

  • Page 15: Lifting Method

    Lifting method Lifting method • When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the front and rear. • Always lift the unit with ropes attached at four points so that impact is not applied to the unit. •...

  • Page 16: Installation

    Installation Installation Location of anchor bolt (Unit: mm) The location of anchor bolt 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. •...

  • Page 17: Preparation Of Piping

    Installation Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. I Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 18 Installation FLARE SHAPE and FLARE NUT TIGHTENING TORQUE Precautions when connecting pipes • See the following table for flare part machining dimensions. • When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first.
  • Page 19 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 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.

  • Page 20: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation WARNING Always use extreme care to prevent the refrigerant gas (R410A) from leakage while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning.
  • Page 21 Refrigerant piping installation Connection of High/Low Pressure Common pipe Slave2 Outside Unit Slave Outside Unit Slave1 Outside Unit Main Outside Unit Master Outside Unit 2 Outside Units 3 Outside Units 1) For the high/low pressure common pipe, connect both master outside unit and slave outside units to the pipe by using elbows.

  • Page 22: Branch Pipe

    Refrigerant piping installation 3 Outside Units (unit : mm) Connecting Combination specification Gas pipe Liquid pipe branch pipe Blow nitrogen while brazing Don't cut the pipe less Slave1 Outside unit Ø 34.9 than 70mm gas pipe Slave1 Outside unit pipe Ø...
  • Page 23 Installation procedure for HR unit 1. Using an insert-hole-in- anchor, hang the hanging bolt. 2. Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown in the figure in the bottom, and fit the main unit to hang on the hanger metal. Six-sided Nut (M10 or M8) 3.
  • Page 24 Type of HR Unit Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types by the number of connectable indoor units. Ex) Installation of 6 indoor units Consists of HR unit for 4 rooms and HR unit for 2 rooms. PRHR020(2 rooms) PRHR030(3 rooms) PRHR040(4 rooms)
  • Page 25 [ Reducers for indoor unit and HR unit ] (Unit: mm) Gas pipe Models Liquid pipe High pressure Low pressure Indoor unit reducer OD9.52 Ø6.35 OD15.88 Ø12.7 OD19.05 Ø15.88 Ø12.7 OD22.2 Ø19.05 Ø15.88 PRHR020 OD9.52 Ø6.35 OD12.7 Ø9.52 OD15.88 Ø12.7 HR unit reducer OD22.2 Ø19.05...
  • Page 26 Caution 1. Use the following materials for refrigerant piping. • Material: Seamless phosphorous deoxidized copper pipe • Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness. Outer diameter 6.35 9.52...
  • Page 27 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.
  • Page 28 Refrigerant piping installation Installation of water pipe 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.
  • Page 29 Refrigerant piping installation Pipe thickness Shear stress Tensile stress Bending moment Torque (N . m) (kgf . m) (N . m) (kgf . m) inch (kN) (kgf) (kN) (kgf) 12.7 19.05 1200 11.5 25.4 11.2 1120 15.5 31.8 1 1/4 14.5 1450 87.5...

  • Page 30: Device Protection Unit

    Product protection device Device protection unit Strainer on water pipe To protect the water cooling type product, you must install a strainer with 50 mesh or more on the heat water supply pipe. If not installed, it can result in damage of heat exchanger by the following situation. 1.
  • Page 31 Product protection device Installation of flow switch • The flow switch must be installed at the horizontal pipe of the heat water supply out- let of the product and check the direction of the heat water flow before the installa- tion.

  • Page 32: Refrigerant Piping System

    Refrigerant piping system Refrigerant piping system Refrigerant Piping System Example : 3 Outside units, 4 HR units and 10 indoor units Outside unit Y branch HR unit Indoor unit Connection branch pipe Slave 2 Slave 1 between Outdoor units Master "a"...
  • Page 33 ➲ Refrigerant pipe diameter between branches and HR units (B,C,D) Gas pipe [mm(inch)] Liquid pipe Downward indoor unit total capacity [mm(inch)] [kW(Btu/h)] Low pressure High pressure ≤ 5.6 (19,100) Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8) < 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2) ≤ 22.4 (76,400) Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
  • Page 34 N Outdoor Unit Connection ➲ Refrigerant pipe diameter before 1st branch (A,E,F) Gas pipe [mm(inch)] Liquid pipe Upward outdoor unit total capacity [mm(inch)] [HP] Low pressure High pressure 8,10 9.52 (3/8) 22.2 (7/8) 19.05 (3/4) 15.88 (5/8) 28.58 (1 1/8) 22.2 (7/8) 19.05 (3/4) 34.9 (1/ 3/8)
  • Page 35 Prohibited pattern Pattern • Capacity sum of indoor units is over 160kBtu/hr. Pattern Indoor unit Y Branch pipe Low pressure Gas pipe Gas pipe Outdoor Indoor High pressure Gas pipe Unit Unit Unit Liquid pipe Liquid pipe 1) Keep the 40m distance from the first branch to the farthest indoor. 2) Keep the horizontal level between HR units.( for example, the same flour.
  • Page 36 Oil trap application method between outside units • Because of the possibility of oil being accumulated in the outside unit that has stopped, when there is a height difference between outside unit pipes or if the pipe distance between the outside units is over 2m, you must always apply an oil trap. (But, the oil trap between outside units is limited to 1 time and is only applied to the gas pipe.) •...
  • Page 37 The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. Product charge(1unit)(kg) Ex) 10HP Outside unit Additional charge (kg) HR unit (1EA) Indoor unit Total liquid pipe (m): Ø22.2mm x 0.354(kg/m) x 0.266(kg/m) Total liquid pipe (m): Ø19.05mm A: Ø12.7, 50m B: Ø9.52, 10m...
  • Page 38 Note: Fill in the f-gas Label attached on outside about the quantity of the fluorinated greenhouse gases Manufacturing site (See Model Name label) Installation site (If possible being placed adjacent to the service points for the addition or removal of refrigerant) The total Charge ( + ) WARNING Regulation for refrigerant leakage...
  • Page 39 Refrigerant piping system Branch pipe Fitting Y branch To Outdoor Unit To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards upwards Within +/- 10° Viewed from point A in direction of arrow Within ±...

  • Page 40: Thermal Insulation Of Refrigerant Piping

    Refrigerant piping system Thermal insulation of refrigerant piping 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.

  • Page 41: Y Branch Pipe And Header Branch Pipe Type

    Y branch pipe and header branch pipe type Y branch pipe and header branch pipe type Y branch pipe [unit:mm] Models Gas pipe Liquid pipe I.D 6.35 I.D 12.7 I.D 12.7 I.D 9.52 I.D 15.88 I.D 9.52 ➀ ➀ ARBLN01621 I.D 6.35 I.D 15.88 ➀...

  • Page 42: Leakage Test And Vacuum

    Leakage test and vacuum Leakage test and vacuum Leak Test and Vacuum (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.80MPa(38.7 kgf/cm ). For the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize low pressure gas pipe and liquid pipe simultaneously) The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitro-...
  • Page 43 Leakage test and vacuum (3) Refrigerant Charged Method After vacuum completion, primarily charge the calculated amount of additional refrigerant through the high pressure gas pipe and the liquid pipe. If the refrigerant is not charged any more, secondarily charge the remaining refrigerant through the low pressure gas pipe and the liquid pipe.

  • Page 44: Electrical Wiring

    Electrical Wiring Electrical Wiring 1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual.
  • Page 45 Electrical Wiring Outdoor units Outdoor units Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor unit unit unit unit unit unit Remote Remote Remote Remote controller controller controller controller Outdoor units Outdoor units Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor...
  • Page 46 Electrical Wiring Control Box and Wiring Location - Unscrew all the screw, pull out the panel. - Connect the transmission wire between outside unit and indoor unit, the connection between outside unit and central controller system pass through the sub PCB for central control. - When connecting indoor unit with the shield cable, ground at the grounding screw.
  • Page 47 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire • Diameter : over 1.25mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 300m 2) Remote control cable • Types : 3-core cable 3) Simple central control cable •...

  • Page 48: Wiring Of Main Power Supply And Equipment Capacity

    Electrical Wiring N Wiring of Main Power Supply and Equipment Capacity 1. Use a separate power supply for the Outside 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.
  • Page 49 Electrical Wiring 1. 50Hz N Example Connection of Transmission Cable 1 Outside Unit 3 Phase 4 Wires Power line(R, S, T, N) Transmission line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse : ELCB) 3 Phase 4 Wires Power supply...
  • Page 50 Electrical Wiring N Example Connection of Transmission Cable 2 Outside Units Master I When the power source is connected 3 Phase 4 Wires Power line(R, S, T, N) In series between the units. Slave Transmission line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Transmission line (2 shield line):...
  • Page 51 Electrical Wiring N Example Connection of Transmission Cable 3 Outside Units Master I When the power source is connected In series between the units. 3 Phase 4 Wires Power line(R, S, T, N) Slave1 Transmission line (3 line): Wired remote control Slave2 Single Phase of power supply line(L,N) Transmission line (2 shield line):...
  • Page 52 Electrical Wiring 2. 60Hz N Example Connection of Transmission Cable 1 Outside Unit 3 Phase 4 Wires Power line(R, S, T, N) Transmission line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse : ELCB) 3 Phase 4 Wires Power supply...
  • Page 53 Electrical Wiring N Example Connection of Transmission Cable 2 Outside Units Master I When the power source is connected 3 Phase 4 Wires Power line(R, S, T, N) In series between the units. Slave Transmission line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Transmission line (2 shield line):...
  • Page 54 Electrical Wiring N Example Connection of Transmission Cable 3 Outside Units Master I When the power source is connected In series between the units. 3 Phase 4 Wires Power line(R, S, T, N) Slave1 Transmission line (3 line): Wired remote control Slave2 Single Phase of power supply line(L,N) Transmission line (2 shield line):...
  • Page 55 Electrical Wiring N Example Connection of Communication Cable [BUS type] • Connection of communication cable must be installed like below figure between 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).

  • Page 56: Hr Unit Pcb

    HR Unit PCB #4 valve housing #1 valve housing #1 cooling valve LED(green) #1 heating valve LED(red) 7-SEG SW05M (Switch for addressing HR unit) SW01M SW02M SW01M/SW03M/SW04M (Dip switch for setup of (Switch for manual valve SW03M SW04M the function of HR unit) addressing) Switch for setup of HR Unit 1.
  • Page 57 2) Selection of the model of the HR unit (For 2 rooms) (For 3 rooms) (For 4 rooms) PRHR020 PRHR040 PRHR040 Initial Setting 1 room Connected 2 rooms Connected 3 rooms Connected 4 rooms Connected ❈ Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory. WARNING •...
  • Page 58 3) Setting the Valve Group. DIP S/W setting Example Indoor Unit Indoor Unit Not control Indoor Unit Indoor Unit Indoor Unit No.1, 2 Valve Indoor Unit Large capacity indoor unit Control Indoor Unit No.2, 3 Valve Large capacity indoor unit Control Indoor Unit No.3, 4 Valve...
  • Page 59 2. SW05M (Rotary S/W for addressing HR unit) Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. Ex) Installation of 3 HR units 3.
  • Page 60 Flow chart for auto addressing for indoor units and HR units 1) Auto addressing for indoor unit 2) Auto pipe detection 3) Manual pipe detection(Execute in case of Auto pipe detection failure) • Turn off all the indoor units before auto addressing. If indoor unit is operated, auto addressing would not be completed.
  • Page 61 WARNING 1. Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB is replaced. • Operation error occurs unless power is applied to the indoor and HR units. 2. Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are different.
  • Page 62 Flow chart of auto-addressing for indoor units Turn HR unit , indoor unit and outdoor unit on in the order named. Wait for 3 minutes Press SW02V of the outdoor unit main PCB for 5 seconds '88' is displayed on outdoor unit main PCB and HRunit PCB The number of the indoor units connected is displayed at 7-SEG of the outdoor unit main PCB...
  • Page 63 Flow chart of auto addressing for pipe detection Confirmation of indoor unit address setting Outdoor unit is operated for 5~30 minues. Turn No.1 of SW02M of HR unit PCB off. Is the pipe setting condition Confirm that the setting of No.2, 3 of satisfied during the operation of SW02M corresponds with the number of indoor unit?
  • Page 64 Flow chart of manual addressing for pipe detection Execute in case of Auto pipe detection Wait for about 5 minutes. failure The number of the indoor units installed is Turn No.1 of SW02M of HR unit PCB on. displayed. Ex)HR ➠ The number of the indoor Reset the power of HR unit PCB.
  • Page 65 Example of manual valve addressing (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) • Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differ- ently at its wired remote control Display and setup Setup and Contents...
  • Page 66 Example of checking valve address (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) Display and Setup Setup and Contents • Operation: Turn dip S/W No.1 on. • Display: "11" is displayed in 7-SEG SW01M SW03M •...

  • Page 67: Dip Switch Setting

    Electrical Wiring Dip switch setting 1. Location of setting switch SW01B SW02B 7 segment SW01B SW02B 1 2 3 4 1 2 3 4 If the applicable dip switch is not set correctly, the product may not operate properly. 2. Dip switch setting 1) Set the dip switch and turn on the power of the outside unit to check whether the set value is correctly entered in the 7 segment.
  • Page 68 Electrical Wiring I Master Outside Setting SW01B Setting SW02B Setting Remark Normal mode at shipping factory 1 2 3 4 1 2 3 4 I Slave outside Setting (1 unit: master outside) SW01B Setting SW02B Setting Remark Normal mode at shipping factory 1 2 3 4 1 2 3 4...
  • Page 69 Electrical Wiring Function SW01B Setting SW02B Setting Remark Standard mode at shipping longest Pipe factory Length 1 2 3 4 1 2 3 4 After the system turn on, Water temp Dip Switch 7,12 are checking completed is indicated on 7-Segment 1 2 3 4 1 2 3 4...
  • Page 70 Electrical Wiring Indoor unit auto addressing • The address of indoor units would be set by auto addressing 1) Wait for 3 minutes after applying power supply (master and sub outside unit, indoor unit). 2) Press the switch of the outside unit (SW02V) for 5 seconds. 3) A "88"...
  • Page 71 Electrical Wiring Group Number setting Group Number setting for Indoor Units Confirm the power of whole system(Indoor Unit, Outside Unit) is OFF, otherwise turn off. The transmission lines connected to INTERNET terminal should be connected to central control of Outside unti with care for their polarity( A ¡...
  • Page 72 Electrical Wiring Outside unit Dry Contact installation and connection • Connect wires as below figure at the hole of backside of Outside Unit Dry Contact. • Insert the wire in the connection hole pushing the "Push" button. • Setting Main PCB Dip SW of Master Outside Unit. Mode Change Outdoor Unit Heating...

  • Page 73: Test Run

    Test Run Test Run Water supply system test run • Before executing the test run for the product, you must first test the heat source water system. The test run for the product must be executed after checking the flow rate and temperature of the heat source water supplied.
  • Page 74 Test Run Precaution before test run Check whether the air is completely removed and the water supply is flowing smoothly. Check whether there is any refrigerant leakage of any disconnected or loose communication or power wire, or use the electric wiring diagram to check the wiring connection condition. Check whether the power and communication wire are connected.

  • Page 75: Maintenance Of Plate Type Heat Exchanger

    Test Run How to Cope with Abnormal Test Run Item Phenomenon Cause Checkpoint and resolution Check whether the heat source water supply pump is operating. When connecting the flow switch, Check whether the heat source water supply pipe is clogged. heat-sourced water doesn’t flow or CH24 the amount of its flow lacks due to...
  • Page 76 Test Run Daily check/management 1. Water quality control The plate type heat exchanger is not structured to be disassembled, cleaned or replaced with parts. To prevent corrosion or scaling on the plate type heat exchanger, special care must be taken to control the water quality. Water quality must satisfy the minimum criteria of the reference water quality items.

  • Page 77: Error Display

    Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outside unit control board as shown in the table.
  • Page 78 Test Run Display Error item Root cause of error number Slave2 outside unit inverter compressor opera- Initial operation failure due to slave2 outside unit inverter compressor 2 6 3 tion failure error error Master outside unit inverter DC link over-volt- Compressor turned Off due to master outside unit inverter DC voltage 2 8 1 age error...
  • Page 79 Test Run Display Error item Root cause of error number Slave1 outside unit inverter compressor dis- Slave1 outside unit inverter compressor discharge temperature sensor 4 1 2 charge temperature sensor error disconnection or short circuit Slave2 outside unit inverter compressor dis- Slave2 outside unit inverter compressor discharge temperature sensor 4 1 3 charge temperature sensor error...
  • Page 80 Test Run Display Error item Root cause of error number Master outside unit 3 phase power reverse Master outside unit 3 phase power reverse phase connection 5 4 1 phase Slave1 outside unit 3 phase power reverse Slave1 outside unit 3 phase power reverse phase connection 5 4 2 phase Slave2 outside unit 3 phase power reverse...
  • Page 81 Test Run Display Error item Root cause of error number Master outside unit over-cooling outlet temper- Master outside unit over-cooling outlet temperature sensor disconnec- 1 1 5 1 ature sensor error tion or short circuit Slave1 outside unit over-cooling outlet temper- Slave1 outside unit over-cooling outlet temperature sensor disconnec- 1 1 5 2 ature sensor error...

  • Page 82: Cooling Tower Applied Method

    Water cooling type cooling tower applied method Cooling tower applied method Open type Closed type cooling tower cooling tower side side Heat exchange [Open type cooling tower + Second heat exchanger] [Closed type cooling tower] Heat exchanger is installed between the cooling tower Heat source water of the cooling tower is supplied and outside unit system piping, and the temperature directly to the outside unit system.

  • Page 83: Caution For Refrigerant Leak

    Caution For Refrigerant Leak Caution For Refrigerant Leak The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. Introduction Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 84 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room I Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) Refrigerant concentration the limiting concentration, perform the...

  • Page 85: Water Solenoid Valve Control

    Water Solenoid Valve Control Water Solenoid Valve Control Central Control (Use DDC Port) Water Water Relay CN_SV1(to DDC) Solenoid Relay Valve CN_SV2(220V Out) PI485 Individual Control (Use 220V Out Port) Water Water Relay CN_SV1(to DDC) Solenoid Relay Valve CN_SV2(220V Out) Set the dip switch refer to Fig.1 and turn on the power when you individual control for water solenoid valve control.
  • Page 86 P/No.: MFL30215324 Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.

This manual is also suitable for:

Arwb100la2Arwb500la2Arwb600la2Arwb400la2Arwb200la2Arwb300la2

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