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56   |   LOOP CIRCUIT DESIGN 

LOOP CIRCUIT DESIGN   |   57

W

ater Loop Circuit Design

Multi V W

ater 5 575V Source Unit Engineering Manual

© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. “LG” is a registered trademark of LG Corp.

© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. “LG” is a registered trademark of LG Corp.

Water Piping System Installation

If water temperature is maintained at 68°F in winter and 86°F in summer, insulation is not required. Water pipe insulation is suggested if the 

following conditions exist:
• Water pipe is subject to freezing.

• Water pipe is located where water can condense on the surface of the pipe from ambient room temperatures higher than the temperature of 

the water in the pipe.

• Boiler piping (to save energy losses from the boiler).

• Where required by local codes.

Open Tower Design Schematic

When using an open cooling tower or open geothermal wells, an intermediate heat exchanger is recommended to be installed to protect the 

water source unit from contamination.

Figure 24:  Open Tower Design Schematic – Requires Intermediate Heat Exchanger

E x pansion Tank

Open Cooling Tower

V1

Control Panel

Boiler

V2

T2

Pump

H eat E x changer 

( Plate Ty pe)

M ulti V

Water IV

Unit

T1

Intermediate Water

H eat E x changer

Refrigerant

Piping System Specifications

WATER CIRCUIT INSTALLATION

Figure 23:  Variable Water Flow Valve Control Kits for Triple Frame

S hutoff

Valv e

50 M esh

S trainer

Flex

Connector

Flow

S witch

PWFCK N000

1

PWFCK N000

1

PWFCK N000

1

S erv ice

Valv e

S erv ice

Valv e

1

Variable Water Flow Valv e Control K it PWFCK N000 controls operation of the

 field-supplied M odulating Control Valv e. The v alv e must be 24 v olt,  normally -closed.

M odulating

Control

Valv e

1

M odulating

Control

Valv e

1

M odulating

Control

Valv e

1

Valv e Power ( 24V)

and Control

Pressure

G auge

Pressure

G auge

Thermometer

Thermometer

S hutoff Valv e

S hutoff Valv e

S hutoff

Valv e

50 M esh

S trainer

Flex

Connector

Flow

S witch

S erv ice

Valv e

S erv ice

Valv e

Valv e Power ( 24V)

and Control

Pressure

G auge

Pressure

G auge

Thermometer

Thermometer

S hutoff Valv e

S hutoff Valv e

S erv ice

Valv e

S erv ice

Valv e

Valv e Power ( 24V)

and Control

Pressure

G auge

Pressure

G auge

Thermometer

Thermometer

S hutoff Valv e

S hutoff Valv e

S hutoff

Valv e

50 M esh

S trainer

Flex

Connector

Flow

S witch

Condenser Water S upply

Condenser Water Return

Piping System Specifications

WATER CIRCUIT INSTALLATION

 Variable Water Flow Valve Control Kit for Triple Frame

Содержание Multi V Water V ARWM072CAS5

Страница 1: ...ENGINEERING MANUAL Variable Refrigerant Flow Water Source Outdoor Units 6 0 to 48 0 Tons ...

Страница 2: ...serious injury CAUTION This symbol indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury This symbol indicates situations that may result in equipment or property damage accidents only This symbol indicates an action that must not be performed Unit Nomenclature 4 LG Air Conditioner Technical Solution LATS 5 6 Refrigerant Charge Worksheet 7 Water So...

Страница 3: ...out and validate LG Multi V Variable Refrigerant Flow VRF Multi F Multi F MAX Single Zone and Energy Recovery Ventilator 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 d...

Страница 4: ... check to see if Y Branches will also need to be changed Changes to outdoor unit and indoor unit capacities Capacities changes may impact line length changes Additional refrigerant charge quantity Trim Charge Trim charge will change if piping lengths and diameters change The As Built version must reflect installed piping lengths to ensure correct trim charge All documents submitted by the contract...

Страница 5: ...ting Laboratories ETL and bear the ETL label Wiring in these units are in accordance with the National Electrical Code NEC Temperature Ranges Heat Pump Configuration In Heat Pump configuration the system can operate in heating only mode with an entering water temperature EWT of 14 F to 113 F Heat pump units can operate in cooling only mode with an EWT of 23 F to 113 F Heat Recovery Configuration I...

Страница 6: ... versions of LG s indoor units and water source units are designated Generation 4 Gen 4 For Gen 4 units to operate with Gen 4 features the air conditioning system must meet the following requirements All indoor units heat recovery units and water source units must be Gen 4 All water source units must have Gen 5 software installed Water source units DIP switch 3 must be set to ON factory default se...

Страница 7: ... FVC68D Unit Data Refrigerant Type R410A R410ARefrigerant Factory Charge lbs 9 9 9 9 9 9 9 9 9 9 Refrigerant Control Location EEV Indoor Unit Max Number Indoor Units System2 13 16 20 23 32 Sound Press dB A 3 Cooling Heating 46 48 54 54 58 Net Unit Weight lbs 348 348 348 348 348 Shipping Weight lbs 370 370 370 370 370 Communication Cables5 6 2 x 18 AWG Heat Exchanger Stainless Steel Plate Maximum P...

Страница 8: ... all projects to ensure correct line sizing Designer must verify the shop drawing design against the as built design using LATS Contractor must also use LG manufactured Y Branch and Header Kits only Table 3 Multi V Water V 575V Units Combination Unit Model Number 36 0 Ton ARWM432CAS5 40 0 Ton ARWM480CAS5 48 0 ARWM576CAS5 Individual Component Model Numbers ARWM144CAS5 x 3 ARWM144CAS5 x 2 ARWM192CAS...

Страница 9: ...1 6 14 5 25 16 0 ARWM192CAS5 1 14 2 17 8 30 20 0 ARWM240CAS5 2 7 6 11 6 14 5 9 5 25 15 24 0 ARWM289CAS5 2 11 6 11 6 14 5 14 5 25 25 28 0 ARWM337CAS5 2 14 2 11 6 17 8 14 5 30 25 36 0 ARWM432CAS5 3 11 6 11 6 11 6 14 5 14 5 14 5 25 25 25 40 0 ARWM480CAS5 3 14 2 11 6 11 6 17 8 14 5 14 5 30 25 25 48 0 ARWM576CAS5 3 14 2 14 2 14 2 17 8 17 8 17 8 30 30 30 Multi V Water V 575V Unit Specifications ELECTRIC...

Страница 10: ...G is a registered trademark of LG Corp Single Frame Heat Pump and Heat Recovery DIMENSIONS Dual Frame Heat Pump and Heat Recovery DIMENSIONS Job Name Location ARWM072CAS5 Multi VTM Water 5 Heat Pump Heat Recovery 6 Ton Water Source Unit Tag No Date PO No Job Name Location Tag No Date PO No Page 2 of 2 For continual product development LG reserves the right to change specifications without notice A...

Страница 11: ...a Inc North York ON Canada All rights reserved LG is a registered trademark of LG Corp Triple Frame Heat Pump and Heat Recovery DIMENSIONS WIRING DIAGRAMS 6 8 10 12 16 Tons Multi V Water V 575V Job Name Location Tag No Date PO No Page 2 of 2 For continual product development LG reserves the right to change specifications without notice ARWM576CAS5 Multi VTM Water 5 Heat Pump Heat Recovery 48 Ton W...

Страница 12: ... Pressure Sensor Strainer Check Valve Service Valve 4 Way Valve Solenoid Valve Temperature Sensor High Pressure Liquid High Pressure Vapor Low Pressure Vapor M M S S Sub Cooling HEX EEV EEV Water Outlet pipe Water Inlet pipe Plate HEX Water Outlet Temp Outside Air Temp REFRIGERANT FLOW DIAGRAMS Multi V Water V Heat Pump Config Heating Operation 575V 6 8 10 12 16 Ton M M S EEV EEV Sub Cooling HEX I...

Страница 13: ...ve High Pressure Sensor Water Out Water In Water Outlet Temperature Sensor Sub Cooling HEX REFRIGERANT FLOW DIAGRAMS 575V 6 8 10 12 16 Ton Multi V Water V Heat Recovery Config Heating Operation s s s s s s s s s s s s HR unit HighTemperature High Pressure Liquid HighTemperature High Pressure Vapor LowTemperature Low Pressure Vapor IDU HEX IDU Flare Joint Flare Joint M EEV IDU HEX IDU Flare Joint F...

Страница 14: ...nt Flare Joint M EEV IDU HEX IDU Flare Joint Flare Joint M EEV IDU HEX IDU Flare Joint Flare Joint M EEV s Remarks Check Valve EEV Solenoid Valve Pressure Sensor Strainer Temperature Sensor SVC Valve Pressure Switch S C h a r g i n g P o r t REFRIGERANT FLOW DIAGRAMS 575V 6 8 10 12 16 Ton Multi V Water V Heat Recovery Config Heating Based Simultaneous Operation Heating ON Heating ON Heating ON Coo...

Страница 15: ... a l v e H i g h P r e s s u r e Se n s o r W a t e r O u t W a t e r I n W a t e r O u t l e t T e m p e r a t u r e Se n s o r H i g h P r e s s u r e V a p o r P i p e L o w P r e s s u r e V a p o r P i p e L i q u i d P i p e C h a r g i n g P o r t REFRIGERANT FLOW DIAGRAMS 575V 6 8 10 12 16 Ton Multi V Water V Heat Recovery Config Oil Return Heating ON Heating ON Heating ON Cooling ON HR un...

Страница 16: ...0 ton 59 ARWM432CAS5 36 0 ton 59 ARWM480CAS5 40 0 ton 61 ARWM576CAS5 48 0 ton 63 Measurement taken 3 3 above finished floor and at a distance of 3 3 from face of unit Measurements taken with no attenuation and units operating at full load normal operating condition Sound level will vary depending on a range of factors such as construction acoustic absorption coefficient of particular area in which...

Страница 17: ...s Canada Inc North York ON Canada All rights reserved LG is a registered trademark of LG Corp Multi V Water V 575V continued ARWM288CAS5 ARWM336CAS5 ACOUSTIC DATA Sound Pressure Levels ARWM432CAS5 ARWM480CAS5 HEAD LOSS BY WATER FLOW Multi V Water V 575V Systems ARWM576CAS5 Multi V Water V 575V Models ARWM072CAS5 ARWM096CAS5 ARWM 121CAS5 ARWM144CAS5 ARWM192CAS5 0 2 4 6 8 10 12 14 0 10 20 30 40 50 6...

Страница 18: ...2 12 7 I D 3 8 9 52 X2 4 5 16 110 I D 1 25 4 I D 3 4 19 05 I D 3 4 19 05 I D 7 8 22 2 I D 1 25 4 I D 1 25 4 I D 7 8 22 2 13 5 8 346 14 15 16 379 3 3 4 96 3 2 3 3 2 I D 7 8 22 2 I D 1 2 12 7 I D 1 4 6 35 4 5 16 110 O D 1 1 8 28 58 I D 7 8 22 2 4 1 2 115 X2 3 15 16 100 O D 5 8 15 88 I D 1 2 12 7 2 3 4 70 O D 7 8 22 2 I D 5 8 15 88 I D 3 4 19 05 4 3 4 120 O D 1 1 2 38 1 I D 1 3 8 34 9 I D 1 1 8 28 58...

Страница 19: ...or Dual Frame Systems ACCESSORIES Outdoor Unit Y Branches Outdoor Unit Y branches for Heat Recovery Configuration For Dual Frame Systems For Triple Frame Systems ACCESSORIES Outdoor Unit Y Branches Combination specification Combination specification Low pressure Vapor Pipe Liquid Pipe High pressure Vapor Pipe Multi frame Connector ARCNB21 ARCNB21 ARCNB31 Liquid Pipe Unit inch Unit inch Low pressur...

Страница 20: ...15 16 5 15 16 4 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 Headers for Heat Pump and Heat Recovery Configuration Headers ACCESSORIES LG headers serve as central connections for multiple runout pipe segments terminating at indoor units Headers must be used with LG systems and be properly installed following the instructions in the applicable LG manual Field supplied headers a...

Страница 21: ...ard PCB using an accessory cable without the need for a separate interface device The main screen for LGMV allows the 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 Full screen graph of actual high and low pressures and high and low pressure limits A sliding bar enabl...

Страница 22: ...ELECTRICAL CONNECTIONS System for Heat Pump Configuration on page 42 System for Heat Recovery Configuration on page 43 DIP Switch Settings For Use With Gen 4 Indoor Units on page 44 ...

Страница 23: ...r Outdoor Unit Communication Terminal Block Master Outdoor Unit Communication Terminal Block Slave 1 Outdoor Unit Communication Terminal Block Slave 2 Outdoor Unit Communication Terminal Block IndoorUnit IndoorUnit ODU IDU CENTRAL ODU IDU CENTRAL For Heat Recovery Unit information refer to the applicable Engineering Manual on www lghvac com Figure 9 Example of a Typical Heat Pump Configuration Pow...

Страница 24: ...NLY ust be ON System will operate WITH Gen 4 indoor unit features Gen 4 or Higher Gen 4 ONLY odel 2A ONLY OFF System will operate but WITHOUT Gen 4 indoor unit features Gen 4 or Higher Gen 4 ONLY Any combination of odels 1A 2A ust be O factory default Does NOT include Gen 4 features System will not operate if DIP Switch No 3 is ON and an error code will be generated Gen 4 or Higher Any combination...

Страница 25: ...WATER LOOP CIRCUIT DESIGN Water Design Guide on page 46 Water Circuit Installation on page 50 ...

Страница 26: ...o u r ce U n i t s I n t e r l o ck O p e r a t i o n R o o m 1 R o o m 2 R o o m 3 5 9 F 6 8 F 5 9 F 68 F M e ch a n i ca l R o o m WATER DESIGN GUIDE Water Heating Cycle Diagram WATER DESIGN GUIDE Design Steps A Multi V Water 5 575V system requires a water cooling heating source This year round heating and cooling system must have a two pipe closed loop water circuit that circulates water contin...

Страница 27: ...rs in the water loop especially if the water temperature is operated above 104 F Ensure all air is purged from the system Maintain the following levels Item Closed Type System Effect Circulating Water Supplemented Water Corrosion Scale Basic Items pH 77 F 7 0 8 0 7 0 8 0 O O Conductivity 77 F mS m Below 30 Below 30 O O Chlorine ions mg Cl L Below 50 Below 50 O Sulfate ions mg SO4 2 2 L Below 50 Be...

Страница 28: ...rly or parts other than those specified by LG are used there is risk of fire electric shock explosion and physical injury or death WARNING WATER CIRCUIT INSTALLATION Pipe Insulation Water pipe insulation is suggested in the following conditions Where water pipe is subject to freezing Water pipe where water can condense on surface of pipe from ambient room temperatures higher than temperature of wa...

Страница 29: ...ot share the electrical circuit with other devices There is risk of fire electric shock and physi cal injury or death due to heat generation Do not use damaged or loose power wiring Do not modify or extend the outdoor unit s power wiring randomly Ensure that the power wiring will not be pulled nor weight be placed on the power wiring during operation There is risk of fire electric shock and physi ...

Страница 30: ...onnector Flow S witch S erv ice Valv e S erv ice Valv e Valv e Power 24V and Control Pressure G auge Pressure G auge Thermometer Thermometer S hutoff Valv e S hutoff Valv e Condenser Water S upply Condenser Water Return Variable Water Flow Valve Control Kit for Dual Frame Piping System Specifications WATER CIRCUIT INSTALLATION Configuring Variable Water Flow Valve Control Kit for each WSU LG recom...

Страница 31: ...Panel Boiler V2 T2 Pump H eat E x changer Plate Ty pe M ulti V Water IV Unit T1 Intermediate Water H eat E x changer Refrigerant Piping System Specifications WATER CIRCUIT INSTALLATION Figure 23 Variable Water Flow Valve Control Kits for Triple Frame S hutoff Valv e 50 M esh S trainer Flex Connector Flow S witch PWFCK N0001 PWFCK N0001 PWFCK N0001 S erv ice Valv e S erv ice Valv e 1 Variable Water...

Страница 32: ...PING LIMITATIONS For Systems Designed for Heat Pump Configuration Following pages present Multi V Water V piping limitations and are for illustrative purposes only Designers MUST use LATS when designing LG VRF systems Length Total pipe length Longest actual pipe length Equivalent pipe length1 A ΣB ΣC 1 640 feet 656 feet 738 feet ℓ Longest pipe length after first branch 131 feet 295 feet conditiona...

Страница 33: ...ed main pipe A diameters as indicated by outdoor unit capacity Example When an indoor unit combination ratio of 120 is connected to a 20 ton outdoor unit 24 tons and indoor unit with a 7 000 Btu h capacity is located at the first branch 1 ain pipe A diameters on a 20 ton outdoor unit 1 1 8Ø inches vapor and 5 8Ø inches liquid 2 Pipe diameters between first and second branches however are 1 3 8Ø va...

Страница 34: ... of the tube Drawn temper rigid ACR copper tubing is available in sizes 3 8 through 2 1 8 inches ASTM B 280 clean dry and capped Annealed temper soft ACR copper tubing is available in sizes 1 4 through 2 1 8 inches ASTM B 280 clean dry and capped Handling the Piping To avoid operation failure a VRF system CANNOT have contaminants or moisture in the piping network Piping must be kept clean dry and ...

Страница 35: ...plicable Engineering Manual on www lghvac com WSU Water Source Unit HRU Heat Recovery Unit IDU Indoor Unit A Main Pipe from Water Source Unit to First Y branch B HRU to HRU Y branch to HRU HRU to Header or Y branch to Y branch C Heat Recovery Unit Header to Indoor Unit Example of Pipe Sizing When Installing a Heat Recovery System Example Triple frame system four 4 heat recovery units one 1 header ...

Страница 36: ...performances to fluctuate Y branches and other header branches cannot be installed downstream of the initial header branch PIPING LIMITATIONS For Systems Designed for Heat Recovery Configuration Following pages present Multi V Water V piping limitations and are for illustrative purposes only Designers MUST use LATS when designing LG VRF systems Slave 2 Slave 1 Master To Heat Recovery Units A1 A2 A...

Страница 37: ...ixed points provisions must be provided to allow pipe expansion to naturally occur generally by expansion Loops or U bends Flaring the Piping When flaring the piping use a dedicated R 410A flaring tool use only synthetic oil between the nut and the flare not inside the piping to achieve correct torque and prevent leaks Flares must be deeper to handle the higher pressures of R 410A When brazing the...

Страница 38: ...o not install the unit in a location where acidic solution and spray sulfur are often used as it can cause bodily injury or death Do not use the unit in environments where oil steam or sulfuric gas are present as it can cause bodily injury or death Water source units are not weatherproof Always install water source units indoors Failure to follow this installation guideline can create an electrica...

Страница 39: ...isk of the product falling and causing physical injury WARNING Place a protective cloth or other soft material at the locations where the casing comes in contact with the lifting straps to prevent damage to painted surfaces Figure 38 Moving requirements for water source units Water Source Unit s Single Frame Installation Install single frame water source units as shown Anchor bolt locations for in...

Страница 40: ...ics Canada Inc if the available space is less than the space shown in these figures If water piping passes along the side of a frame ensure the indicated space is available after considering the space taken by the piping Ensure that the floor chosen location has enough strength to support the weight of the unit s If it does not have sufficient strength the unit s may fall and cause physical injury...

Страница 41: ...20001747 ISO 9001 2008 LG ELECTRONICS INC EM_MultiV_WaterV_575V_10_1 LG Electronics Canada Inc Air Conditioning Technologies 20 Norelco Drive North York Ontario M9L2X6 http www lgvrf ca ...

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