LG MULTI V WATER MINI Engineering Manual Download Page 48

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Due to our policy of continuous product innovation, some specifications may change without notification.

48 | WATER CIRCUIT

MUL

TI V W

ater Mini Unit Engineering Manual

WATER CIRCUIT INSTALLATION

Figure 22: Water Solenoid Valve Controlled by Building Management System (BMS).

Flow Switches and Solenoid Valves

CN_26

CN_24

CN_22

INTERNET

MAIN PCB

C_Box

DDC

BMS

Flow Switch

Solenoid

Valve

Water

Out

Water

CN_26

CN_24

CN_22

MAIN PCB

C_Box

Flow Switch

Solenoid

Valve

Water

Out

Water

L2 3(A) 3(B) 4(A) 4(B)

1 2 3 4 5 6 7

OFF

Figure 23: Water Solenoid Valve Controlled by Water Source Unit.

Figure 24: Set the DIP switches as below and turn on the power (For water solenoid valve controlled by water source unit).

See diagrams below for suggested flow switch wiring. Also shown is wiring for solenoid valves (optional) to turn water flow on / off to the unit.

Summary of Contents for MULTI V WATER MINI

Page 1: ...ENGINEERING MANUAL Variable Refrigerant Flow Water Source Units 4 4 Tons ...

Page 2: ...ta information and other materials are the property of LG Electronics U S A Inc and are disclosed by LG Electronics U S A Inc only in confidence This document is for design purposes only To access additional technical documentation such as submittals indoor unit engineering manuals installation service product data performance general best practice and building ventilation manuals as well as white...

Page 3: ...chnical Solution LATS 5 6 Rrefrigerant Charge Worksheet 7 Water Source Product Data 8 20 Mechanical Specifications 9 Product Features and Benefits 10 General Data 11 Electrical Data 11 Dimensions 12 Wiring Diagram 13 Refrigerant Flow Diagrams 14 16 Acoustic Data 17 Accessories 18 20 Performance Data 21 33 Cooling Capacity 22 27 Heating Capacity 28 33 Correction Factors 34 36 Electrical Connections...

Page 4: ...LG is a registered trademark of LG Corp 4 INTRODUCTION MULTI V Water Mini Unit Engineering Manual 058 G A Type N Heat Pump Electrical Ratings G 208 230V 60Hz 1Ø 053 52 900 Condenser W Water Source Family AR Multi V Refrigerant R410A 2 Basic Function A Generation 2 Second Water Source Units WSU AR W N UNIT NOMENCLATURE Water Mini Unit Nominal Cooling Capacity in Btu h ...

Page 5: ...ntilator ERV systems directly into CAD drawings LATS Revit integrates the LG LATS program with Revit software It permits engineers to layout and validate Multi V VRF systems directly into Revit drawings AutoCAD and Revit are both registered marks of Autodesk Inc Features All LG product design criteria have been loaded into the program making LATS simple to use double click or drag and drop the com...

Page 6: ...The contractor must mark any deviation from the design on the Shop Drawing including as built straight lines and elbows This Mark Up drawing must be returned to the design engineer or Rep who must input contractor changes into the LATS file Copy the original LATS soft ware file save and rename as a separate file and modify all piping lengths by double clicking on each length and editing informatio...

Page 7: ...Standard SV 30k to 36k 1 01 11 Art Cool Gallery SF 9k to 12k 0 22 12 1 Way Cassette TU 7k to 12k 0 44 13 1 Way Cassette TT 18k to 24k 0 64 14 2 Way Cassette TS 18k to 24k 0 75 15 4 Way 2 x 2 Cassette TR 5k to 7k 0 40 16 4 Way 2 x 2 Cassette TR 9k to 12k 0 55 17 4 Way 2 x 2 Cassette TQ 15k to 18k 0 71 18 4 Way 3 x 3 Cassette TN 7k to 24k 0 88 19 4 Way 3 x 3 Cassette TM 28k to 36k 1 08 20 4 Way 3 x ...

Page 8: ...fications on page 9 Product Features and Benefits on page 10 General Data on page 11 Electrical Data on page 11 Dimensions on page 12 Wiring Diagram on page 13 Refrigerant Flow Diagrams on page 14 Acoustic Data on page 17 Accessories on page 18 ...

Page 9: ...emperature or over under pressure conditions The com pressor is provided with a positive displacement oil pump providing sufficient oil film on all bearing surfaces across the entire inverter modulation range The compressor refrigerant oil is polyvinyl ether PVE having no hygroscopic properties The compressor is wrapped with a heat resistant sound attenuating blanket and mounted on rubber isolatio...

Page 10: ...a concern 1 The compressor discharge is specially designed to minimize the amount of oil leaving the compressor 2 Oil return algorithms flush the oil from the system back to the compressor Inverter Driven The rotary compressor is optimized around the R410A model to maximize compressor efficiency which reduces power consumption and lowers utility bills The latest inverter technology allows the LG M...

Page 11: ... certified under AHRI Standard 1230 Ratings are subject to change without notice Current certified ratings are available at www ahridirectory org 2 Power wiring is field provided solid or stranded and must comply with the applicable local and national codes 3 Sound pressure levels are tested in an anechoic chamber under ISO 3745 standard 4 LG requires that LATS software be used on all projects to ...

Page 12: ...tification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp ARWN053GA2 DIMENSIONS H Side View Front View Top View Isometric L7 L L6 L5 L4 L3 L1 L L2 Vapor Line Liquid Line Capped Line Water Outlet Water Inlet Z X Y M1 M2 W D W D H L1 L2 L3 L4 L5 L6 L7 L8 M1 M2 X Y Z Figure 4 ARWN053GA2 Dimensions ...

Page 13: ...continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp WIRING DIAGRAM 8 3 ARWN053GA2 Figure 5 ARWN053GA2 Wiring Diagram ...

Page 14: ...HEX Fan Indoor Unit Indoor Unit Fan Liquid Gas HEX Temp Liquid Temp Suction Temp Hot Gas Bypass Valve 4 Way Valve Main EEV Low Pressure Sensor Accumu lator Inv Comp High Pressure Switch Discharge Temp High Pressure Sensor Check Valve Solenoid Valve Strainer Thermistor Remark High Pressure Switch S High Water In Water Out Plate Heat Exchanger Pressure Sensor SVC Valve Fusible Plug EEV Fusible Plug ...

Page 15: ...ndoor HEX Indoor Unit Indoor HEX Indoor Unit Fan Fan Liquid Gas HEX Temp Liquid Temp Hot Gas Bypass Valve 4 Way Valve Main EEV Accumu lator Inv Comp High Pressure Switch Discharge Temp High Pressure Sensor High Water In Water Out Plate Heat Exchanger Suction Temp Low Pressure Sensor Fusible Plug Check Valve Solenoid Valve Strainer Thermistor Remark High Pressure Switch Pressure Sensor SVC Valve Fu...

Page 16: ...er Filter Indoor Unit Indoor Unit Fan Fan Indoor HEX Indoor HEX EEV EEV Liquid Gas HEX Temp Liquid Temp Suction Temp Hot Gas Bypass Valve 4 Way Valve Main EEV Low Pressure Sensor Accumu lator Inv Comp High Pressure Switch Discharge Temp High Pressure Sensor High Water In Water Out Plate Heat Exchanger Fusible Plug Check Valve Solenoid Valve Strainer Thermistor Remark High Pressure Switch Pressure ...

Page 17: ...er Mini Unit Sound Levels Sound Pressure Levels Cooling 000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Octave Band Center Frequency Hz Octave Band Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold ARWN053GA2 Octave Band Center Frequency Hz O...

Page 18: ...2 3 4 70 1 1 Liquid Pipe I D 1 2 12 7 2 3 4 70 I D 1 4 6 35 I D 1 4 6 35 I D 1 4 6 35 1 1 I D 3 8 9 52 I D 3 8 9 52 I D 9 52 3 8 O D 3 8 9 52 ARBLN03321 16 1 4 413 15 3 8 390 I D 3 4 19 05 I D 3 4 19 05 I D 3 4 19 05 I D 1 2 12 7 I D 1 2 12 7 2 3 4 70 I D 5 8 15 88 I D 5 8 15 88 I D 1 25 4 I D 1 25 4 O D 1 25 4 3 1 8 80 4 5 16 110 3 1 4 83 1 2 3 3 O D 3 4 19 05 O D 3 4 19 05 1 2 I D 7 8 22 2 I D 7...

Page 19: ... I D 1 2 I D 5 8 I D 5 8 I D 3 4 4 3 4 14 3 16 I D 3 8 I D 3 8 I D 1 4 I D 1 4 I D 3 8 I D 1 2 5 15 16 5 15 16 5 15 16 5 15 16 5 15 16 15 3 4 6 5 16 I D 5 8 I D 1 2 I D 3 4 I D 5 8 I D 7 8 I D 1 1 8 I D 1 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 I D 5 8 I D 1 2 I D 5 8 I D 1 2 I D 5 8 I D 3 4 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 2 6 5 16 22 7 8 I D 3 4 I D 5 8 ID15 88 5 8 ID12 7 1 2 I D 5 8 ...

Page 20: ...n or commissioning agent to connect a computer USB port to the outdoor unit main printed circuit board PCB using an accessory cable without the need for a separate interface device The main screen for LGMV shall allow user to view the following real time data on one screen Additional screens can be accessed by tabs on the main screen 1 Cycleview Graphic of internal components including 2 Graph Ful...

Page 21: ...Cooling Capacity Data on page 22 Heating Capacity Data on page 28 Correction Factors on page 34 PERFORMANCE DATA ...

Page 22: ... 8 4 49 47 1 4 58 15 9 33 4 2 57 36 1 3 05 39 3 3 56 42 8 4 01 44 1 4 11 45 8 4 21 47 1 4 29 19 9 33 4 2 50 36 1 2 99 39 3 3 48 42 8 3 92 44 1 4 03 45 8 4 13 47 1 4 20 120 23 4 3 46 5 1 02 50 4 1 19 54 9 1 38 59 6 1 56 61 5 1 60 63 9 1 64 65 6 1 67 32 4 8 46 5 1 02 50 4 1 19 54 9 1 38 59 6 1 56 61 5 1 60 63 9 1 64 65 6 1 67 41 5 5 46 5 1 02 50 4 1 19 54 9 1 38 59 6 1 56 61 5 1 60 63 9 1 64 65 6 1 ...

Page 23: ...4 72 15 9 34 5 2 66 37 4 3 16 40 7 3 67 44 3 4 14 45 6 4 24 47 3 4 35 48 6 4 43 19 9 34 5 2 58 37 4 3 09 40 7 3 60 44 3 4 05 45 6 4 16 47 3 4 27 48 6 4 31 100 23 4 3 41 3 0 91 44 7 1 06 48 7 1 24 52 9 1 39 54 5 1 42 56 6 1 46 58 2 1 48 32 4 8 41 3 0 91 44 7 1 06 48 7 1 24 52 9 1 39 54 5 1 42 56 6 1 46 58 2 1 48 41 5 5 41 3 0 91 44 7 1 06 48 7 1 24 52 9 1 39 54 5 1 42 56 6 1 46 58 2 1 48 50 8 0 41 ...

Page 24: ... 7 4 32 48 0 4 40 15 9 34 1 2 48 36 9 2 94 40 2 3 43 43 6 3 86 45 0 3 95 46 7 4 05 48 0 4 12 19 9 34 1 2 41 36 9 2 87 40 2 3 36 43 6 3 78 45 0 3 87 46 7 3 97 48 0 4 01 80 23 4 3 33 0 0 66 35 7 0 76 38 9 0 89 42 3 1 00 43 6 1 02 45 3 1 05 46 5 1 07 32 4 8 33 0 0 66 35 7 0 76 38 9 0 89 42 3 1 00 43 6 1 02 45 3 1 05 46 5 1 07 41 5 5 33 0 0 66 35 7 0 76 38 9 0 89 42 3 1 00 43 6 1 02 45 3 1 05 46 5 1 0...

Page 25: ...34 1 2 77 37 0 3 12 38 1 3 20 39 6 3 27 40 7 3 33 15 9 28 9 1 88 31 3 2 23 34 1 2 59 37 0 2 92 38 1 2 99 39 6 3 06 40 7 3 12 19 9 28 9 1 82 31 3 2 17 34 1 2 54 37 0 2 86 38 1 2 93 39 6 3 01 40 7 3 04 60 23 4 3 24 8 0 44 26 8 0 50 29 2 0 59 31 7 0 66 32 7 0 68 33 9 0 69 34 9 0 71 32 4 8 24 8 0 44 26 8 0 50 29 2 0 59 31 7 0 66 32 7 0 68 33 9 0 69 34 9 0 71 41 5 5 24 8 0 44 26 8 0 50 29 2 0 59 31 7 0...

Page 26: ... 3 1 95 29 1 1 99 15 9 20 7 1 11 22 3 1 32 24 3 1 54 26 5 1 73 27 3 1 78 28 3 1 83 29 1 1 85 19 9 20 7 1 08 22 3 1 29 24 3 1 51 26 5 1 70 27 3 1 75 28 3 1 79 29 1 1 81 40 23 2 8 16 5 0 25 17 9 0 30 19 5 0 35 21 1 0 39 21 8 0 39 22 6 0 40 23 3 0 41 32 3 2 16 5 0 25 17 9 0 30 19 5 0 35 21 1 0 39 21 8 0 39 22 6 0 40 23 3 0 41 41 3 6 16 5 0 25 17 9 0 30 19 5 0 35 21 1 0 39 21 8 0 39 22 6 0 40 23 3 0 4...

Page 27: ... 14 6 0 31 15 9 0 36 16 4 0 36 17 0 0 38 17 5 0 38 13 3 12 4 0 22 13 4 0 26 14 6 0 31 15 9 0 35 16 4 0 36 17 0 0 37 17 5 0 37 75 5 3 12 4 0 30 13 4 0 36 14 6 0 41 15 9 0 46 16 4 0 48 17 0 0 48 17 5 0 50 10 6 12 4 0 28 13 4 0 33 14 6 0 38 15 9 0 44 16 4 0 45 17 0 0 45 17 5 0 46 13 3 12 4 0 27 13 4 0 32 14 6 0 38 15 9 0 42 16 4 0 43 17 0 0 44 17 5 0 45 85 5 3 12 4 0 38 13 4 0 43 14 6 0 51 15 9 0 57 ...

Page 28: ...8 0 82 1 3 33 80 0 3 22 78 1 3 15 76 7 3 04 74 9 2 91 70 7 2 56 15 9 82 1 3 21 80 0 3 14 78 1 2 98 76 7 2 86 74 9 2 74 70 7 2 45 19 9 82 1 3 09 80 0 3 06 78 1 3 04 76 7 2 91 74 9 2 80 70 7 2 45 120 23 8 0 28 6 3 73 28 3 3 52 28 2 3 28 27 8 3 14 28 0 3 05 27 3 2 73 15 9 32 3 3 98 32 0 3 78 31 9 3 56 31 5 3 41 31 8 3 31 30 9 2 97 19 9 35 7 4 24 35 4 4 04 35 2 3 84 34 8 3 68 35 1 3 57 34 1 3 20 32 8 ...

Page 29: ...3 2 04 59 9 1 86 15 9 73 1 2 45 69 9 2 34 67 1 2 10 65 6 2 10 63 3 1 99 59 9 1 81 19 9 73 1 2 45 69 9 2 28 67 1 2 16 65 6 1 99 63 3 1 86 59 9 1 69 100 23 8 0 25 5 3 78 25 4 3 57 25 3 3 28 25 0 3 14 24 8 3 01 24 3 2 73 15 9 28 9 4 03 28 7 3 83 28 6 3 56 28 3 3 41 28 0 3 26 27 6 2 97 19 9 31 9 4 29 31 7 4 10 31 5 3 84 31 2 3 68 31 0 3 52 30 4 3 20 32 8 0 44 4 5 09 43 4 4 94 42 5 4 72 41 8 4 52 41 0 ...

Page 30: ...8 0 61 8 1 99 58 4 1 81 55 2 1 51 54 0 1 46 51 6 1 46 49 2 1 34 15 9 61 8 1 81 58 4 1 75 55 2 1 46 54 0 1 40 51 6 1 40 49 2 1 29 19 9 61 8 1 86 58 4 1 81 55 2 1 51 54 0 1 46 51 6 1 40 49 2 1 29 80 23 8 0 22 8 2 51 21 4 2 41 20 2 2 31 20 0 2 23 19 9 2 13 19 5 1 96 15 9 25 8 2 73 24 2 2 62 22 9 2 50 22 6 2 42 22 5 2 31 22 1 2 12 19 9 28 5 2 94 26 7 2 82 25 3 2 70 25 0 2 61 24 9 2 49 24 3 2 29 32 8 0...

Page 31: ...1 1 11 38 2 1 05 15 9 48 0 1 40 45 4 1 29 43 0 1 11 42 0 1 16 40 1 1 11 38 2 0 99 19 9 48 0 1 40 45 4 1 29 43 0 1 16 42 0 1 05 40 1 0 99 38 2 0 99 60 23 8 0 17 1 1 75 16 0 1 68 15 1 1 62 15 0 1 50 14 9 1 48 14 6 1 32 15 9 19 4 1 90 18 1 1 83 17 1 1 76 17 0 1 63 16 9 1 61 16 6 1 44 19 9 21 4 2 05 20 0 1 97 19 0 1 89 18 7 1 76 18 7 1 73 18 3 1 54 32 8 0 29 7 2 52 27 4 2 43 25 5 2 32 25 0 2 16 24 7 2...

Page 32: ...3 8 0 34 3 0 94 32 4 0 94 30 7 0 88 29 9 0 76 28 6 0 81 27 3 0 76 15 9 34 3 0 88 32 4 0 81 30 7 0 76 29 9 0 81 28 6 0 70 27 3 0 76 19 9 34 3 0 88 32 4 0 81 30 7 0 76 29 9 0 81 28 6 0 70 27 3 0 76 40 23 5 3 10 9 1 00 10 3 0 95 9 7 0 91 9 6 0 85 9 5 0 82 9 4 0 75 10 6 12 4 1 08 11 6 1 04 11 0 0 99 10 9 0 92 10 8 0 89 10 6 0 82 13 3 13 7 1 17 12 8 1 12 12 1 1 07 12 0 1 00 11 9 0 96 11 7 0 88 32 5 3 1...

Page 33: ...7 0 85 18 7 0 78 17 7 0 70 17 2 0 67 16 4 0 66 15 7 0 59 13 3 19 7 0 85 18 7 0 81 17 7 0 73 17 2 0 70 16 4 0 62 15 7 0 62 68 5 3 19 7 0 77 18 7 0 70 17 7 0 69 17 2 0 66 16 4 0 62 15 7 0 55 10 6 19 7 0 73 18 7 0 66 17 7 0 66 17 2 0 62 16 4 0 58 15 7 0 57 13 3 19 7 0 73 18 7 0 66 17 7 0 66 17 2 0 62 16 4 0 58 15 7 0 57 77 5 3 19 7 0 69 18 7 0 62 17 7 0 62 17 2 0 55 16 4 0 54 15 7 0 51 10 6 19 7 0 66...

Page 34: ...erating Temperature Ranges on page 35 Water Source Unit Indoor Unit Matching Limitations on page 35 Additional Charge for Pipe Length on page 35 Elevation Correction Factors on page 36 CORRECTION FACTORS ...

Page 35: ...d Piping Ø3 8 ft If the result is a negative number refrigerant does not need to be added x 0 041 lbs ft Length ft of Ø1 4 inch Liquid Pipe x 0 015 lbs ft Correction Factor of Water Source Unit Correction Factor of Indoor Unit s Product Charge lbs Additional Charge lbs Example Four Ton Water Source Unit Table 17 Refrigerant Charge Example Water Source Unit Indoor Unit Maximum Quantity Sum of Indoo...

Page 36: ...e program These factors are only to be used when performing manual calcula tions Table 20 ARWN053GA2 Cooling Correction Factors Elevation Differences feet Equivalent Pipe Length ELF 25 33 66 98 131 164 197 230 Indoor Units Above Water Source Unit feet 0 1 0 99 0 96 0 93 0 91 0 90 0 87 0 85 25 1 0 99 0 96 0 93 0 91 0 90 0 87 0 85 33 0 99 0 96 0 93 0 91 0 90 0 87 0 85 66 0 96 0 93 0 91 0 90 0 87 0 8...

Page 37: ...Power Wiring and Communication Cable on page 38 DIP Switch Settings For Use With Gen 4 Indoor Units on page 40 ELECTRICAL CONNECTIONS ...

Page 38: ...r death Install a main shutoff switch that interrupts all power sources simultaneously There is risk of fire electric shock explosion physical injury or death Communication cable between ODU to IDUs to be 18 AWG 2 conductor twisted stranded shielded Ensure the communication cable shield is properly grounded to the ODU chassis only Do not ground the ODU to IDUs communication cable at any other poin...

Page 39: ...fire electric shock explosion physical injury or death Install a main shutoff switch that interrupts all power sources simultaneously There is risk of fire electric shock explosion physical injury or death Communication cable between ODU to IDUs to be 18 AWG 2 conductor twisted stranded shielded Ensure the communication cable shield is properly grounded to the ODU chassis only Do not ground the OD...

Page 40: ... and water source units that have Gen 4 or higher software All air and water source units indoor units heat recovery units and controllers in a system must be Gen 4 compatible or the system will not operate with Gen 4 indoor unit features Figure 14 Location and Setting of Outdoor Unit DIP Switch 3 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF Air Water Source Unit DIP Switc...

Page 41: ...WATER LOOP CIRCUIT DESIGN Water Design Guide on page 42 Piping System Specifications on page 44 Flow Switches and Solenoid Valve Wiring on page 48 Variable Water Flow Control Kit on page 50 ...

Page 42: ...well while at the low end of the temperature range an auxiliary heat source like a boiler solar panel or geothermal well adds heat If entering water temperature falls below 42 F glycol must be added to the system Piping pumps and accessories must be sized to provide adequate water flow to the water cooled unit based on nominal flow rates listed per model number Design Schematic The Multi V Water M...

Page 43: ... PRVC1 required for all entering water temperatures one kit per frame When the Multi V Water Mini unit is in cooling mode heat is rejected to the geothermal system When the Multi V Water Mini unit is in heating mode heat is absorbed from the geothermal system Multi V Water Mini units have factory installed stainless steel plate heat exchangers To protect these heat exchangers it is recommended to ...

Page 44: ...blockage A water balancing valve circuit setter or flow control valve to regulate proper water flow to each water source unit Dielectric pipe unions to prevent the possibility of galvanic corrosion Pressure gauges at inlet and outlet Thermometers at inlet and outlet Flexible connectors at inlet and outlet Shutoff valves at the inlet and outlet to permit service of the water source unit Condensate ...

Page 45: ...er cooled unit capacity 3 Apply the corresponding pressure drop correction factor from table below and multiply by the water cooled unit pressure drop to find the net water cooled unit pressure drop Table 23 Antifreeze Correction Factors Piping System Specifications Antifreeze Type Item Antifreeze by Weight 10 20 30 40 50 Methanol Cooling 0 998 0 997 0 995 0 993 0 992 Heating 0 995 0 99 0 995 0 97...

Page 46: ...elow 30 Below 30 Chlorine ions mg Cl ℓ Below 50 Below 50 Sulfate ions mg SO4 2 ℓ Below 50 Below 50 Acid consumption pH4 8 mgCaCO3 ℓ Below 50 Below 50 Total Hardness mg CaCO3 ℓ Below 70 Below 70 CalciumHardness mgCaCO3 ℓ Below 50 Below 50 Ionic static silica mg SiO2 ℓ Below 30 Below 30 Reference Item Iron mg Fe ℓ Below 1 0 Below 0 3 Copper mg Cu ℓ Below 1 0 Below 0 1 Sulfate ion mg SO42 ℓ Must not ...

Page 47: ...the coolant supply and the heat source water supply will mix and the system will not function Flow Switch Differential Pressure Switch A flow switch is a required installation component on the water pipes connected to the water source unit Flow switch must be rated for 208 230V and must be a normally open closed on increase of flow type Flow switch will perform as the first protection device when ...

Page 48: ...noid Valves CN_26 CN_24 CN_22 INTERNET MAIN PCB C_Box DDC BMS Flow Switch Solenoid Valve Water Out Water In 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 L1 L2 3 A 3 B 4 A 4 B 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 ON OFF OFF Figure 23 Water Solenoid Valve Controlled by Water Source Unit Figure 24 Set the DIP switches as below and turn on the power Fo...

Page 49: ...hen setting the flow switch it is recommended to use the default set value of the water source unit to satisfy the minimum flow rate Minimum flow rate range is 50 Refer ence flow rate 4 4 ton 15 9 gpm When the Variable Water Flow Control kit is also installed set the flow switch minimum flow rate to 40 of the nominal flow rate instead of 50 If the product operates while the flow switch contact poi...

Page 50: ... variable pumping condenser water systems The control board transformer and wiring provide connections to a field supplied modulating water valve Variable Water Flow Control Kit Parts included Cable Assembly Terminal Block Assembly Variable Water Flow Control PCB Transformer Screws Variable Water Flow Control Kit PCB 1 CN_PWR Power input terminal DC 12V 2 CN_AO Signal output terminal to control a ...

Page 51: ...lock two pin yellow terminal block 8 Connect a power cable DC 12V to CN_PWR 12V GND of the PRVC1 9 Connect a signal cable DC 0 10V of the water flow control valve to CN_AO AO_01 A GND A of the PRVC1 10 Case of two water flow control valve Connect a signal cable DC 0 10V of water flow control valve to CN_AO AO_02 B GND B of PRVC1 11 Connect a power cable AC 24V of the water flow control valve to th...

Page 52: ...d Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 52 WATER CIRCUIT MULTI V Water Mini Unit Engineering Manual WATER CIRCUIT INSTALLATION Variable Water Flow Control Kit Required Accessory Variable Water Flow Control Kit Wiring Diagram Water Mini Unit Main PCB Figure 27 Variable Water Flow Control Kit Wiring Diagram ...

Page 53: ...er source Unit PCB DC12V or DC15V GND Power Source DC12V GND WATER CIRCUIT INSTALLATION Variable Water Flow Control Kit Required Accessory Variable Water Flow Control Kit Power Source Input When wiring the power source from the water source unit When wiring an external power source The Variable Water Flow Control Kit can accept only DC power input Do not use 220VAC power input as it will damage th...

Page 54: ...ater Mini Unit Engineering Manual WATER CIRCUIT INSTALLATION Variable Water Flow Control Kit Required Accessory Wiring for the Variable Water Flow Control Kit Power Source PCB and Transformer PCB and transformer can accept only DC 12V power input Do not use AC power input as it will damage the unit AWG 23 wiring is recommended for the power DC 12V line Figure 28 Variable Water Flow Control Kit Pow...

Page 55: ...le Water Flow Control Kit Required Accessory Wiring for the Variable Water Flow Control Kit Valve The Variable Water Flow Control Kit can control a maximum of two valves If only one valve is present then the sub signal connector must not be used AWG 23 wiring is recommended for the power AC 12V line and signal DC 0 10V line AC 24V Power Source for Variable Water Flow Valve DC 0 10V Control Signal ...

Page 56: ...and the PCB voltage signal Minimum flow rate range is 50 Reference flow rate 4 4 ton 15 9 gpm When the Variable Water Flow Control kit is also installed set the flow switch minimum flow rate to 40 of the nominal flow rate instead of 50 If the flow rate is lower it will damage the water source unit ON L1 2 3 4 OFF Default is L1 ON L2 OFF Table 24 Output Signal Setting DIP Switch Setting Function Co...

Page 57: ... 7 OFF OFF DIP Switch Setting Function Variable Water Flow Control Mode 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 OFF ON OFF Table 26 Water Source Unit DIP Switch Settings After the DIP switch is changed the reset switch must be pressed to reflect the setting Before operating the water source unit check the water flow rate and the PCB voltage signal Minimum flow rate range is 50 Reference flow rate 4 4 ton 1...

Page 58: ...Refrigerant Piping Design on page 59 Placement Considerations on page 63 PIPING LIMITATIONS AND PLACEMENT CONSIDERATIONS ...

Page 59: ... ELF Equivalent Length of pipe in Feet Longest total equivalent piping length 475 7 feet Longest distance from water source unit to indoor unit 230 feet Actual 295 2 feet Equivalent Distance between fittings and indoor units 20 inches Distance between fittings and Y branches 20 inches Distance between two Y branches 20 inches Distance between Header and indoor units 20 inches Minimum distance betw...

Page 60: ...t IDU Header IDU IDU IDU IDU IDU Brazed Cap D C C C C C C Example Six 6 indoor units connected Water Source Units WSU IDU Indoor Units Header A Main Pipe from Water Source Unit to Header C Header to Indoor Unit D To Farthest Indoor Unit Water Mini System Using a Header See pages 61 62 for refrigerant pipe diameter and pipe length tables Indoor units must be installed at a lower position than the H...

Page 61: ...inches Table 29 Pipe Capabilities Example Five 5 indoor units connected Water Source Units WSU IDU Indoor Units Y branches Header A Main Pipe from First Y branch B Pipe from Y branch to Y branch or Header C Pipe from Y branch or Header to Indoor Unit D Pipe to Farthest Indoor Unit Water Mini System Using Y branches and Header Length 230 feet ℓ 131 feet Elevation1 98 4 feet Elevation2 49 feet Water...

Page 62: ...ure 31 Selecting Refrigerant Piping Example Five 5 indoor units connected Water Source Units WSU IDU Indoor Units A Main Pipe from Water Source Unit to Y branches B Branch Piping C Branch Piping to Indoor Unit IDU Water Source Unit Capacity Btu h Liquid Pipe Inches O D Gas Pipe Inches O D 54 600 Ø3 8 Ø3 4 Table 32 Size of Branch Piping B to Branch Piping B Indoor Unit Capacity Btu h Liquid Pipe In...

Page 63: ...ing towers or other system components that contain water are exposed to areas where the temperature may fall below 32 F antifreeze solution must be used Freezing of the heat source water will damage the plate heat exchanger Antifreeze solution includes proper mixtures of ethylene glycol propylene glycol or methanol to the water to prevent freezing Addition of water heater boiler to maintain minimu...

Page 64: ...ver or mounting bolts Allow room for field installation Properly insulate the liquid and vapor lines separately up to the point of connection inside the confines of the unit frame See table below for water source unit connection types Refrigerant piping is connected through the access holes on the front panel of the Multi V Water Mini unit Figure 35 Refrigerant Pipe Connections Capped Pipe Vapor P...

Page 65: ...cal documentation such as submittals indoor unit engineering manuals installation service general best practice and building ventilation manuals as well as white papers catalogs LATS software programs and more see www lghvac com ...

Page 66: ...ng Technologies 4300 North Point Parkway Alpharetta Georgia 30022 www lghvac com EM_MultiVWaterMini_ARWN053GA2_8_20 Supersedes EM_MultiVWaterMini_5_16 VRF EM BM 001 US 014D23 VRF EM BM 001 US 013L26 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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