LG ARWM121BAS5 - User Manual

5 ENGLISH Select installation location of the HR unit suitable for followingconditions - 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. - Avoid a place subject to a strong radiation h...

6 ENGLISH Individual Installation Collective / Continuous Installation During the installation of the unit, consider service, inlet, and outletacquire the minimum space as shown in the figures below. : Service area * In case of the water pipe passing side product, please make sufficient service plac...

7 ENGLISH Items pH(25°C) Conductivity[25°C](mS/m) Chlorine ion(mg CI-/ l ) Sulfuric acid ion(mg SO 2 -/ l ) Acid demand[pH 4.8] (mg SiO 2 / l ) Total hardness(mg SiO 2 / l ) Ca hardness(mg CaCO 3 / l ) Ion silica(mg SiO 2 / l ) Fe(mg Fe/ l) Copper(mg Cu/ l) Sulfuric acid ion(mg S 2 / l) Ammonium ion...

8 ENGLISH Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. • Use the H-beam support as a base support • Noise and vibration may occur from the floor or wall since vibration is transferred through the installation ...

9 ENGLISH 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. (Useester o...

10 ENGLISH Nitrogen substitution method Welding, as when heating without nitrogen substitution a largeamount of the oxide film is formed on the internal piping. The oxide film is a caused by clogging EEV, Capillary, oil hole ofaccumulator and suction hole of oil pump in compressor. It prevents norma...

11 ENGLISH Y Branch A B To Outdoor Unit To branch piping or indoor unit A B Facing upwards Facing downwards Viewed from point Ain direction of arrow Within +/- 10° Y-branches between the outdoor units must be installedhorizontally. CAUTION ! A ≥ B ≥ C ① IDU side connection pipe ② ODU to ODU connecti...

12 ENGLISH Whenever connecting the indoor units with the HR unit, install theindoor units in numerical order from No.1. Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X), No.1, 3, 4 (X), No.2, 3, 4 (X). CAUTION ! WARNING ! Before brazing work, remove gas in the HR Unit by c...

13 ENGLISH HR unit HR unit sealing Changeover under control Auto changeover Changeover under control Zoning control group 1 Zoning control group 2 (Max. 8 Indoor Units) (Max. 8 Indoor Units) Installation of Zoning Control Some indoor unit can be connected to one port of HR unit. WARNING ! • A branch...

14 ENGLISH WARNING ! When installing and moving the air conditioner to another site, besure 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 unitmay be damaged. • After sel...

16 ENGLISH CAUTION ! Do not directly connect the drain outlet to the water pipe outlet. (It can cause problems to the product.) 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 in...

17 ENGLISH 1 inch or 3/4 inch socket Cover Micro-switchAdjustment screwVibration plate Bellows Pad Installation of flow switch • The flow switch must be installed at the horizontal pipe of the heat water supply outlet of the product and check the direction of the heatwater flow before the installati...

19 ENGLISH Y branch, Header and HR unit connection pattern Pattern 1 HR1 48 k 48 k 1 2 HR2 48 k 48 k 3 4 B • Impossible installation : Head branch pipe HR unit Pattern 2 HR1 1 2 3 4 5 6 7 7 k 7 k 7 k 7 k 7 k 24 k 24 k • Impossible installation : HR unit Head branch pipe Y and Head branch pipe. B A P...

20 ENGLISH Pattern 8 A A • * : Maximum indoor units per a branch are 8 indoor units HR1 48 k 48 k 1 2 HR2 * B 12 k 12 k 12 k 12 k 3 4 5 6 24 k 7 24 k 8 • Pipe installation from outdoor units to HR units : 3 pipes(Low pressure Gas pipe, High pressure Gas pipe, Liquid pipe) • Pipe installation from HR...

21 ENGLISH h * : See Table 4 Classification Section Type Y branch Y/header branch Header branch Max pipe length Outdoor Unit ÷ Indoor Unit Maximum pipe length(L) A+B+C+D+e ≤ 150 m(492 ft) (Conditionally 200 m (656 ft))* A+B+b ≤ 150 m(492 ft) A+C+e ≤ 150 m(492 ft) (Conditionally 200 m (656 ft))* A+f ...

22 ENGLISH (Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D) (Table 4) Conditional Application • To satisfy below condition to make 40m(131ft) ~ 90m(295ft) of pipe length after first branch. Required Example 1 Select the diameter of thepipe between the 1stbranch and the la...

23 ENGLISH Pipe Connection Method/Precautions for Series connections between Outdoor units - Separate Y branch joints are needed for series connections between outdoor units. - Y-branches between the outdoor units must be installed horizontally. - Please refer to the below connection examples to ins...

Low Pressure Gas pipe High Pressure Gas pipe Liquid pipe Refrigerant charging WARNING ! • Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. If the above equation can not be satisfied, then follow thefollowing steps.• Select...

25 ENGLISH • When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available forconnection then cap pipes should be fitted to the surplus branches. • Fit branch pipe lie in a horizontal plane. Pinched pipe B Horizontal plane View from point B in ...

26 ENGLISH For Heat Recovery System Installation Y branch pipe [Unit : mm(inch)] Models Pipe ARBLB07121 Low-Pressure Vapor Pipe I.D 28.58(1-1/8) I.D 31.8(1-1/4) I.D 34.9(1-3/8) O.D 31.8(1-1/4) I.D 28.58(1-1/8) I.D 31.8(1-1/4) O.D 22.2(7/8) I.D 22.2(7/8) O.D 19.05(3/4) I.D 28.58(1-1/8) I.D 19.05(3/4)...

28 ENGLISH [Unit:mm(inch)] Header Models Pipe 4 branch ARBL054 Gas pipe 120(4-23/32) 150(5-29/32) 360(14-3/16) 120(4-23/32) ID 15.88(5/8) ID 12.7(1/2) ID 15.88(5/8) ID 19.05(3/4) ID 12.7(1/2) ID 15.88(5/8) Liquid pipe 120(4-23/32) 120(4-23/32) 150(5-29/32) 360(14-3/16) ID 9.52(3/8) ID 6.35(1/4) ID 9...

29 ENGLISH Slave Master Header Slave Master The others - Ensure that the branch pipes are attached vertically. Slave Master Slave Master Vertical Distribution Slave Master 1st 3rd 3rd main pipe distribution 2nd Vacuum mode off method CAUTION ! ODU operation stops during vacuum mode. Compressor can't...

30 ENGLISH NOTE ! If the ambient temperature differs between the time whenpressure is applied and when the pressure drop is checked, applythe following correction factor There is a pressure change of approximately 0.01 MPa (1.5 psi) foreach 1.8 °F (1 °C) of temperature difference. Correction= (Temp....

31 ENGLISH NOTE ! Always add an appropriate amount of refrigerant. (For therefrigerant additional charge)Too much or too little refrigerant will cause trouble.To use the Vacuum Mode (If the Vacuum mode is set, all valvesof Indoor units and Outdoor units will be opened.) WARNING ! When installing and...

32 ENGLISH CAUTION - Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations andguidance of each electric power company. - Install the Outdoor Unit communication cable away from the power source wiring so that it is not affected b...

33 ENGLISH CAUTION ! When the 400 volt power supply is applied to “N” phase by mistake,check damaged parts in control box and replace them. Precautions when laying power and ground wiring Use round pressure terminals for connections to the power terminal block.When laying ground wiring, you must use...

34 ENGLISH Wiring of main power supply and equipmentcapacity - Use a separate power supply for the Outdoor Unit and Indoor Unit. - Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring andconnections. - The cable size is the minimum va...

38 ENGLISH Example) Connection of Communication Cable [BUS type] [STAR type] - Connection of communication cable must be installed likebelow figure between indoorunit to outdoor unit. - Abnormal operation can be caused by communicationdefect, when connection ofcommunication cable is installedlike be...

39 ENGLISH • Initial display order Order No Mean ① 8~20 Master model capacity(HP) ② 10~20 Slave 1 model capacity(HP) ③ 10~20 Slave 2 model capacity(HP) ④ 8~54 Total capacity(HP) ⑤ 2 Heat Pump 3 Heat Recovery (Factory Setting) ⑥ 38 380 V model 46 460 V model 57 575 V model 22 220 V model ⑦ 1 Full fun...

42 ENGLISH 2 Zoning setting SW01E SW #1 On : Select Valve #5 Slave ON OFF SW02B SW01B SW01C After selecting No.1 zoning indoor unit, input the central control address of indoor unit. Slave After selecting No.2 zoning indoor unit, input the central control address of indoor unit. Setting SW01C to ‘0’...

43 ENGLISH The Procedure of Automatic Addressing • Automatic addressing process end Numbers of indoor unit connected are indicated for 30 seconds on 7-segment LED after completing process. Indoor address number is displayed on wired remote controller or indoor unit display window. It is not an error...

44 ENGLISH Reset the power of HR unit PCB Confirm that the setting of No.2, 3 of SW02M corresponds with the valve connection type 88' is displayed on 7-SEG of the outdoor unit main PCB Outdoor unit is operated for 5~60 minutes The number of indoor units detected is displayed for 30 seconds on the ou...

No. Display and setup Setup and Contents 1 - Operation: Turn DIP S/W No.1 on. - Display: "11" is displayed in 7-SEG 2 - Operation : Turn DIP S/W No.1 off. - 7-SEG disappeared 7-SEG SW01E 7-SEG SW01E No. Display and setup Setup and Contents 1 - Operation: more than 2 DIP switches turned on. -...

47 ENGLISH Group Number setting Group Number setting for Indoor Units - Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. - The communication cables connected to CEN.A and CEN.B terminal should be connected to central control of Outdoor Unit with care fortheir ...

48 ENGLISH Switch (Up) Switch (Down) Left side Right side CAUTION ! • Ask an authorized technician to setting a function. • If do not use a function, set an off-mode. • If use a function, first install a Cool & Heat selector. Setting the outdoor unit address (Fn 5) How to set the mode Turn on DI...

49 ENGLISH Function setting Setting Frequency (Hz) oFF - oP1 143 Hz oP2 135 Hz oP3 128 Hz oP4 120 Hz oP5 113 Hz oP6 105 Hz oP7 98 Hz oP8 90 Hz oP9 83 Hz CAUTION ! • Ask an authorized technician to setting a function. • If use a function, first install a Central controller. Master unit PCB DIP switch...

50 ENGLISH 1 Check whether the air is completely removed and the watersupply is flowing smoothly. 2 Check whether there is any refrigerant leakage of anydisconnected or loose communication or power wire, or use theelectric wiring diagram to check the wiring connection condition.Check whether the pow...

51 ENGLISH Water supply system test run Before executing the test run for the product, you must first test theheat source water system. The test run for the product must be executed after checking the flowrate and temperature of the heat source water supplied. Equipment design Execute the product te...

52 ENGLISH 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 onthe plate type heat exchanger, special care must be taken to controlthe water quality. Water quality must sat...

53 ENGLISH 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 outdoor unit control board as sho...

55 ENGLISH h : HR unit # : HR unit number Display Title Cause of Error HR Unit related error 2 0 0 1 Searching pipe Error Failure of automatic addressing of valves 2 0 1 #HR + h HR unit1 Liqiud sensor error Liquid pipe sensor of HR unit open or short 2 0 2 #HR + h HR unit1 Sub Cooling Pipe sensor er...

56 ENGLISH In case the concentration exceeds the limit When the concentration exceeds the limit, change original plan or takeone of the countermeasures shown below: • Countermeasure 1 Provide opening for ventilation.Provide 0.15 % or more opening to floor space both above andbelow door, or provide o...