INTRODUCTION
“Architectural Appeal” on page 6
Page 1: ...SINGLE ZONE MEGA WALL MOUNTED ENGINEERING MANUAL 3 4 1 1 1 2 and 2 Tons Mega Inverter Models LS090HEV1 LS120HEV1 LS180HEV1 LS240HEV1 3 4 and 1 Tons Mega 115V Models LS090HXV LS120HXV ...
Page 2: ...l as all reports illustrations data 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 A summary list of safety precautions is on page 4 For more technical materials such as submittals catalogs installation owner s and service manuals visit www lghvac com ...
Page 3: ... both central HVAC and window mounted air conditioners These inverter heat pump systems are available in a variety of configurations to suit dif ferent cooling and heating situations Installation by a qualified HVAC contractor is safe and easy little to no duct work or sheet metal is required Inverter Systems LG Single Zone Mega Inverter and Mega 115V Wall Mounted air source systems offer the oppo...
Page 4: ...0HEV1 34 LSU240HEV1 35 LSN090 120HXV 36 Accessories 37 PERFORMANCE DATA 39 Cooling Capacity 40 Heating Capacity 43 Equipment Selection Procedure 49 LS090 240HEV1 50 LS090HXV LS120HXV 51 Building Ventilation Design Guide 52 53 Placement Considerations 54 56 REFRIGERANT PIPING DESIGN LAYOUT BEST PRACTICES 57 Refrigerant Piping Design 57 Design Guideline Summary 58 Selecting Field Supplied Copper Tub...
Page 5: ...INTRODUCTION Architectural Appeal on page 6 ...
Page 6: ...ols These single zone systems are available in a nominal capacity range of 3 4 to 2 tons These are best suited for applica tions with zones that require heating or cooling such as residential and small business office buildings Single Zone Mega Wall Mounted outdoor and indoor units are available in 208 230V 60Hz 1Ph HEV1 and 115V 60Hz 1Ph HXV Adaptable and Flexible Single zone wall mounted duct fr...
Page 7: ...l Data on page 13 Outdoor Unit Dimensions on page 15 Indoor Unit Dimensions on page 19 Acoustic Data on page 23 Refrigerant Flow Diagrams on page 25 Wiring Diagrams Indoor Units on page 29 Wiring Diagrams Outdoor Units on page 33 Accessories LG Monitoring View Diagnostic Software on page 37 PRODUCT DATA ...
Page 8: ... amount of cooling to the indoor unit Precise refrigerant volume delivery translates into long periods with coil surface temperatures below dew point and minimizes compressor and fan component run time which may lead to lower utility usage Simplified Installation Cooling and heating applications that use single zone systems simplify and reduce the mechanical and control system design time The desi...
Page 9: ...ts LS N 090 HEV 1 Type N Indoor Wall Mount Unit U Outdoor Heat Pump Unit Family LA Art Cool Premier Gallery Mirror LS High Efficiency Wall Mount Standard Mega Generation or Revision 1 First 2 Second 3 Third 4 Fourth Nominal Capacity Nominal cooling capacity in Btu h 090 091 9 000 120 121 12 000 180 181 18 000 240 24 000 300 307 30 000 360 36 000 Indoor Outdoor Product HEV Mega HXV Mega 115V HYV Ar...
Page 10: ...k of LG Corp GENERAL DATA Mega Pairing Table Outdoor Unit Model Indoor Unit Model Controller Mega Inverter LSU090HEV1 LSU120HEV1 LSN090HEV1 LSN120HEV1 AKB73835318 LSU180HEV1 LSN180HEV1 AKB73835318 LSU240HEV1 LSN240HEV1 AKB73835318 Mega 115V LSU090HXV LSU120HXV LSN090HXV LSN120HXV AKB73456121 Table 1 Single Zone Mega Inverter and Mega 115V Pairing Table The following table shows the available outdo...
Page 11: ...r Type Qty Single Rotary 1 Single Rotary 1 Twin Rotary 1 Twin Rotary 1 Fan IDU Type Qty Cross Flow 1 ODU Type Qty Propeller 1 Motor Drive Brushless Digital Controlled Direct Airflow Rate IDU Max H M L CFM 318 276 226 177 424 353 272 212 629 512 441 353 689 600 494 388 ODU Max CFM 953 953 1 342 1 766 Piping Liquid Line in OD 1 4 1 4 1 4 1 4 Vapor Line in OD 3 8 3 8 1 2 5 8 Condensation Line OD ID 2...
Page 12: ...er 1 Motor Drive Brushless Digitally Controlled Direct Airflow Rate IDU Max H M L CFM 335 272 212 124 335 272 212 124 ODU Max CFM 1 000 1 000 Piping Liquid Line in OD 1 4 1 4 Vapor Line in OD 3 8 3 8 Condensation Line OD ID 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 22 Pipe Length5 Minimum Maximum ft 6 6 49 2 6 6 49 2 Piping Length5 no add l refrigerant ft 24 6 24 6 Max Elevati...
Page 13: ...ega Inverter System Electrical Data Table Table 5 115V 60Hz 1 Phase Single Zone Single Zone Mega 115V System Electrical Data Table Model Number Nominal Tons Compressor Qty Compressor A Cool Heat Fan Qty ODU Fan A IDU Fan A MCA A MOP A LS090HXV 3 4 1 10 10 1 0 4 0 5 13 5 20 LS120HXV 1 1 10 10 1 0 4 0 5 13 5 20 Voltage tolerance is 10 Maximum allowable voltage unbalance is 2 MCA Minimum Circuit Ampa...
Page 14: ...ilter X X Plasma2 X X Allergy free filter X X 3M Micro Protection filter2 X X Functions Drain pump X X E S P control X X Electric heater X X High ceiling X X Defrost Low ambient Hot start Self diagnostics Soft dry dehumidification Auto changeover Auto clean coil dry Auto restart Child lock X X Forced operation Sleep mode Timer 24hr on off Weekly timer X X Two thermistor control X X Controllers Wir...
Page 15: ...iffs NJ All rights reserved LG is a registered trademark of LG Corp OUTDOOR UNIT DIMENSIONS LSU090HEV1 LSU120HEV1 5 4 2 3 18 1 4 28 1 4 28 1 4 Ø17 3 8 2 1 4 4 5 8 10 9 16 18 3 4 9 5 16 8 5 8 19 1 2 2 3 16 2 1 4 1 2 10 1 16 9 1 16 10 11 16 1 Center of gravity Unit Inch Discharge Air Grille Gas Pipe Connection Port Liquid Pipe Connection Port Control Box Ground Terminal ...
Page 16: ...nc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp LSU180HEV1 OUTDOOR UNIT DIMENSIONS 30 5 16 22 4 3 16 13 15 16 6 1 8 2 1 8 10 15 16 1 20 15 16 21 1 2 10 1 2 8 1 8 4 3 2 5 11 5 16 Item No Part Name 2 13 16 Ø18 5 16 Unit Inch Center of Gravity 9 3 8 20 5 3 4 Discharge Air Grille Gas Pipe Connection Port Liquid Pipe Connection Port Control Box Ground Terminal ...
Page 17: ...iffs NJ All rights reserved LG is a registered trademark of LG Corp OUTDOOR UNIT DIMENSIONS LSU240HEV1 1 34 1 4 21 1 2 6 5 16 14 3 16 2 3 16 11 15 16 Ø20 15 16 25 13 16 24 13 16 12 5 8 3 3 1 8 12 5 8 Item No Part Name Unit Inch Center of Gravity 10 7 16 21 1 8 5 13 16 Discharge Air Grille Gas Pipe Connection Port Liquid Pipe Connection Port Control Box Ground Terminal ...
Page 18: ...LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp OUTDOOR UNIT DIMENSIONS LSU090HXV LSU120HXV 5 4 2 3 28 1 4 Ø17 3 8 10 9 16 9 5 16 19 1 16 2 3 16 2 1 4 7 16 1 Unit Inch 18 1 4 28 1 4 2 1 4 10 1 16 9 1 16 10 11 16 Discharge Air Grille Gas Pipe Connection Port Liquid Pipe Connection Port Control Box Ground Terminal ...
Page 19: ...ved LG is a registered trademark of LG Corp INDOOR UNIT DIMENSIONS LSN090HEV1 Ø2 9 16 Ø2 9 16 Right rear piping Left rear piping Installation Plate Place a level on raised tab Unit Outline 7 9 16 14 7 8 29 3 4 7 1 4 10 7 16 5 3 4 1 2 Unit Inch 14 7 8 7 9 16 Item No Part Name 2 15 16 5 11 16 Return Air Grille Knockout Hole for Piping and Cables 1 3 4 2 3 16 2 2 3 8 5 5 8 2 2 1 8 2 3 8 2 1 3 4 ...
Page 20: ...Cliffs NJ All rights reserved LG is a registered trademark of LG Corp INDOOR UNIT DIMENSIONS LSN120HEV1 5 Ø2 9 16 Right Rear Piping Left Rear Piping Installation Plate Place a level on raised tab 4 13 16 9 5 8 7 5 1 4 16 1 4 18 7 8 34 13 16 8 1 4 11 1 4 Unit Outline Ø2 9 16 3 2 4 1 Unit Inch Item No Part Name Return Air Grille 1 3 4 2 3 16 2 2 3 8 1 3 4 2 Knockout Hole for Piping Cable 2 2 5 16 6 ...
Page 21: ...ghts reserved LG is a registered trademark of LG Corp INDOOR UNIT DIMENSIONS LSN180HEV1 LSN240HEV1 Unit Outline LeftRear Piping RightRear Piping Placealevelonraisedtab Ø2 9 16 Ø2 9 16 18 1 8 22 3 8 8 11 16 12 1 8 7 24in 184mm 7 1 4 6 14in 156mm 6 3 16 9 13 16 2 9 16 1 13 16 2 1 16 40 9 16 12 13 16 9 13 16 5 4 2 1 16 1 13 16 Unit Inch Return Air Grille Knockout Hole for Piping Cable ...
Page 22: ... A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp INDOOR UNIT DIMENSIONS LSN090HXV LSN120HXV 34 7 8 8 5 16 11 1 4 3 2 4 1 Ø2 13 16 5 1 4 3 3 4 Right rear piping Left rear piping Installation Plate Place a level on raised tab Unit Outline 8 9 16 6 15 16 17 7 16 17 7 16 5 Ø2 13 16 4 2 5 16 6 5 16 15 16 Unit Inch Return Air Grille for piping and cable ...
Page 23: ...0 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 LSU090HXV 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 Octave Band Sound Pressure Level 0dB 20μPa Octave Band Center Frequency Hz LSU120HXV...
Page 24: ...cular room in which the unit was installed INDOOR UNIT ACOUSTIC DATA Figure 5 Sound Pressure Levels for Mega Inverter Indoor Units Figure 6 Sound Pressure Levels for Mega 115V Indoor Units Octave Band Sound Pressure Level 0dB 20μPa Octave Band Center Frequency Hz 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 LSN090HXV LSN120HXV Octave Band Sound Pressure Level dB re 20µPa Octave Band ...
Page 25: ...ure thermistor CN TH1 Indoor TH2 Water level sensor optional CN TH2 Indoor TH3 Evaporator middle temperature thermistor CN TH3 Indoor TH4 Discharge pipe temperature thermistor CN TH2 Outdoor TH5 Outdoor air temperature thermistor CN TH1 Outdoor TH6 Condensing temperature thermistor FIELD PIPING Ø 1 4 Copper Tubing FIELD PIPING Ø 3 8 Copper Tubing M M He at Exchanger Evaporator Heat Exchanger Conde...
Page 26: ...level sensor optional CN TH2 Indoor TH3 Evaporator middle temperature thermistor CN TH3 Indoor TH4 Discharge pipe temperature thermistor CN TH2 Outdoor TH5 Outdoor air temperature thermistor CN TH1 Outdoor TH6 Condensing temperature thermistor REFRIGERANT FLOW DIAGRAMS Mega Inverter LSN LSU180HEV1 FIELD PIPING Ø1 4 Copper Tubing FIELD PIPING Ø1 2 Copper Tubing M M He at Exchanger Evaporator Heat E...
Page 27: ...onal CN TH2 Indoor TH3 Evaporator middle temperature thermistor CN TH3 Indoor TH4 Discharge pipe temperature thermistor CN TH2 Outdoor TH5 Outdoor air temperature thermistor CN TH1 Outdoor TH6 Condensing temperature thermistor REFRIGERANT FLOW DIAGRAMS Mega Inverter LSN LSU240HEV1 FIELD PIPING Ø 1 4 Copper Tubing FIELD PIPING Ø5 8 Copper Tubing M M Heat Exchanger Evaporator Heat Exchanger Condense...
Page 28: ...onnector TH1 Indoor air temperature thermistor CN TH1 Indoor TH2 Evaporator middle temperature thermistor CN TH2 Indoor TH3 Discharge pipe temperature thermistor CN TH2 Outdoor TH4 Condensing middle temperature thermistor CN TH1 Outdoor TH5 Outdoor air temperature thermistor t i n U r o o d t u O t i n U r o o d n I Heat Exchanger Evaporator Heat Exchanger Condenser Compressor Accumulator Gas Side...
Page 29: ...ontinuous 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 Inverter Singl Option CN L1 Mega Inverter LSN090HEV1 ...
Page 30: ...al Due to our policy of 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 Mega Inverter LSN120HEV1 Option CN L1 ...
Page 31: ...f 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 Mega Inverter LSN180HEV1 and LSN240HEV1 Option ...
Page 32: ...nual Due to our policy of 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 Mega 115V LSN090HXV and LSN120HXV ...
Page 33: ...f 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 Mega Inverter LSU090HEV1 and LSU120HEV1 Option ...
Page 34: ...ng Manual Due to our policy of 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 Mega Inverter LSU180HEV1 ...
Page 35: ...ur policy of 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 Mega Inverter LSU240HEV1 ...
Page 36: ...e to our policy of 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 Mega 115V LSU090HXV and LSU120HXV 250V 250V 250V ...
Page 37: ...ration mode occupied and unoccupied temperature setpoints fan speed and airflow direction for up to 16 indoor units Programmable schedule with 5 events per day with control of occupied unoccupied on off mode setpoints and fan speed Advanced functions include two setpoint auto changeover minimum difference between setpoints setback and timed override Table 10 Zone Controller Communication Cables Co...
Page 38: ...essory cable with out 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 Setting Converts metric values to imperial values 3 Making Data Recording of real time data to a separate file created to be st...
Page 39: ... Cooling Capacity Data on page 40 Heating Capacity Data on page 43 PERFORMANCE DATA ...
Page 40: ...7 35 5 50 0 48 7 90 5 91 0 50 8 45 6 33 0 51 9 00 6 74 0 53 9 25 6 93 0 55 10 10 7 56 0 57 10 65 7 97 0 59 23 7 89 5 91 0 48 8 48 6 35 0 50 9 07 6 79 0 51 9 66 7 23 0 53 9 93 7 44 0 54 10 84 8 12 0 57 11 43 8 56 0 58 25 8 00 5 99 0 49 8 59 6 43 0 51 9 18 6 88 0 52 9 77 7 32 0 54 10 04 7 52 0 55 10 95 8 20 0 58 11 54 8 65 0 59 30 8 31 6 22 0 53 8 92 6 68 0 54 9 52 7 13 0 56 10 10 7 56 0 58 10 38 7 ...
Page 41: ... PI TC SHC PI TC SHC PI TC SHC PI 14 13 47 9 92 8 68 14 48 10 67 8 95 15 49 11 41 9 22 16 49 12 15 9 51 16 96 12 49 9 80 18 51 13 64 10 19 19 52 14 38 10 50 23 14 46 10 65 8 64 15 54 11 45 8 91 16 62 12 25 9 19 17 71 13 05 9 47 18 20 13 41 9 76 19 87 14 64 10 15 20 96 15 44 10 46 25 14 66 10 80 8 83 15 75 11 60 9 10 16 83 12 40 9 37 17 91 13 20 9 66 18 41 13 56 9 95 20 08 14 79 10 34 21 16 15 59 1...
Page 42: ...C SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI 14 5 20 4 58 0 30 5 59 4 92 0 31 5 98 5 26 0 32 6 37 5 61 0 33 6 55 5 77 0 34 7 15 6 29 0 35 7 54 6 64 0 36 23 5 59 4 92 0 30 6 00 5 28 0 31 6 42 5 65 0 32 6 84 6 02 0 33 7 03 6 19 0 34 7 68 6 76 0 35 8 10 7 13 0 36 25 5 67 4 99 0 31 6 08 5 35 0 31 6 50 5 72 0 32 6 92 6 09 0 33 7 11 6 26 0 34 7 76 6 83 0 36 8 18 7 19 0 37 30 5 89 5 18 0 33 6 31 5 56...
Page 43: ...78 7 36 0 77 7 29 0 77 7 22 0 77 7 16 0 77 7 02 0 76 6 85 0 76 19 17 7 75 0 81 7 51 0 80 7 44 0 80 7 36 0 79 7 31 0 79 7 16 0 78 6 99 0 78 24 23 8 50 0 84 8 24 0 83 8 16 0 83 8 08 0 82 8 02 0 82 7 85 0 81 7 67 0 81 32 30 10 19 0 90 9 88 0 89 9 78 0 89 9 68 0 89 9 61 0 89 9 41 0 88 9 19 0 88 41 38 11 69 0 96 11 33 0 95 11 22 0 95 11 11 0 94 11 02 0 94 10 80 0 93 10 55 0 93 43 40 12 06 0 98 11 70 0 ...
Page 44: ... 10 12 77 1 09 12 46 1 09 59 53 14 13 1 13 13 70 1 12 13 56 1 12 13 43 1 11 13 33 1 11 13 06 1 10 12 75 1 10 64 57 14 43 1 15 13 99 1 14 13 85 1 14 13 72 1 13 13 61 1 13 13 34 1 12 13 02 1 12 70 61 14 71 1 17 14 26 1 16 14 11 1 16 13 98 1 15 13 87 1 15 13 59 1 14 13 27 1 14 75 65 14 91 1 19 14 46 1 18 14 31 1 18 14 17 1 16 14 06 1 16 13 78 1 15 13 45 1 15 LS240HEV1 LS090HXV LS120HXV Outdoor Air Te...
Page 45: ... 3 3 4 9 4 9 6 6 3 3 1 6 8 2 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft 78 8 78 8 82 4 86 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft Air velocity ft s Temperature F 1 6 3 3 6 6 4 9 1 6 3 3 8 2 4 9 9 8 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft 69 8 69 8 6 9 8 6 6 2 73 4 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft Air velocity ft s Temperature F 1 6 3 3 3 3 9 8 6 6 4 9 4 9 8 2 11 5 0 3 3 6 6 ft 0 3 3 6 6 9 8 13...
Page 46: ...elocity ft s Temperature F 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft 66 2 66 2 66 2 69 8 69 8 Air velocity ft s Temperature F 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft 8 2 4 9 4 9 1 6 3 3 6 6 3 3 0 3 3 6 6 ft 0 3 3 6 6 9 8 13 1 16 4 ft Cooling Discharge angle 45 Heating Discharge angle 50 84 2 91 4 87 8 87 8 95 4 9 1 6 3 3 3 3 6 6 8 2 9 8 1 6 4 9 Air velocity ft...
Page 47: ...elocity ft s Temperature F 3 3 98 6 91 4 87 8 84 2 80 6 11 5 13 1 9 8 8 2 4 9 6 6 6 6ft 3 3ft 0ft 26 2ft 13 1ft 9 8ft 6 6ft 3 3ft 0ft 16 4ft 19 7ft 23 0ft 6 6ft 3 3ft 0ft 26 2ft 13 1ft 9 8ft 6 6ft 3 3ft 0ft 16 4ft 19 7ft 23 0ft Air velocity ft s Temperature F 64 4 66 2 69 8 73 4 8 2 13 1 11 5 9 8 8 2 6 6 4 9 3 3 6 6ft 3 3ft 0ft 26 2ft 13 1ft 9 8ft 6 6ft 3 3ft 0ft 16 4ft 19 7ft 23 0ft 6 6ft 3 3ft 0...
Page 48: ...ll Mounted Engineering Manual Due to our policy of 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 ...
Page 49: ... Equipment Selection Procedure on page 50 Building Ventilation Design Guide on page 52 Placement Considerations on page 54 APPLICATION GUIDELINES ...
Page 50: ... outdoor unit to the indoor unit Also determine the elevation difference of the indoor unit above or below the outdoor unit Find corresponding cooling or heating capacity correction factors as shown in Figures 17 through 20 Multiply the correction factors by the cooling or heating capacity obtained from the capacity tables using design conditions The resultant is the NET cooling or heating capacit...
Page 51: ... U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Figure 19 LS090HXV LS120HXV Cooling Coefficient Factor Figure 20 LS090HXV LS120HXV Heating Coefficient Factor EQUIPMENT SELECTION PROCEDURE Cooling 9k 12k 49 2 98 4 Total Pipe Length ft Capacity 100 90 95 24 6 Heating Capacity 24 6 100 95 9k 12k 49 2 98 4 Total Pipe Length ft ...
Page 52: ...uilding Ventilation Design Guide ASHRAE 62 1 and local codes specify the minimum volume of outdoor air that must be provided to an occupied space Outdoor air is required to minimize adverse health effects and it provides acceptable indoor air quality for building occupants The three methods of ac complishing this with single zone systems are summarized here Method 1 Decoupled Dedicated Outdoor Air...
Page 53: ...air is drawn into occupied spaces through a wall louver or gravity roof intake hood Supply fans can also be used to push the outdoor air into the space and building positive pressure will vent the exhaust air through louvers or roof mounted exhaust hoods Outdoor air is neither cooled nor heated before entering the building Refer to Figure 23 Advantages Outdoor air may be manually controlled by the...
Page 54: ...that its airflow fans are not buried by direct heavy snowfall If snow piles up and blocks the airflow the system may malfunction 3 Remove any snow that has accumulated by 4 inches or more on the top of the outdoor unit 4 Place the outdoor unit on a raised platform at least 20 inches higher than the average annual snowfall for the area In environments where there is a possibility of heavy snow the ...
Page 55: ...nd at a minimum height that is equal to the average annual snowfall plus 20 inches Design the mounting base to prevent snow accumulation on the platform in front or back of the unit case If necessary provide a field fabricated hood to keep snow and ice and or drifting snow from accumulating on the coil surfaces Use inlet and discharge duct or hoods to prevent snow or rain from accumulating on the ...
Page 56: ...door unit under an overhang awning sunroof or other roof like structure observe the clearance requirements as shown in Figure 27 for height in relation to the unit This clearance ensures that heat radiation from the condenser is not restricted around the unit Adhere to all clearance requirements if installing the unit on a roof Be sure to level the unit and ensure that the unit is adequately ancho...
Page 57: ...Refrigerant Piping Design on page 58 Selecting Field Supplied Copper Tubing on page 59 Refrigerant Piping System Layout on page 60 Piping Connection on page 59 Electrical Connections on page 64 Mechanical Specifications on page 66 Acronyms on page 67 ...
Page 58: ...t Feet Outdoor unit Indoor unit A B Outdoor unit Indoor unit A B Device Connection Limitations Single zone systems consist of one outdoor unit and one indoor unit One of the most critical elements of a single zone system is the refrigerant piping Table 12 lists pipe length limits that must be followed in the design of a Single Zone Art Cool Premier refrigerant pipe system Refer to Figure 30 for ma...
Page 59: ...pe segment Definitions Layout Procedure Field Provided Isolation Ball Valves It is acceptable to install field supplied ball valves with Schrader ports at the indoor unit Full port isolation ball valves with Schrader ports positioned between valve and indoor unit rated for use with R410A refrigerant should be used on both the liquid and vapor lines If valves are not installed and the indoor unit n...
Page 60: ...ld verify the refrigerant piping system is free of traps sagging pipes sight glasses filter dryers etc Pipe Supports A properly installed pipe system should be adequately supported to avoid pipe sagging Sagging pipes become oil traps that lead to equipment malfunction Pipe supports should never touch the pipe wall supports shall be installed outside around the primary pipe insulation jacket see Fi...
Page 61: ...and pipes buried underground be properly insulated and routed through an ap propriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve Figure 36 Underground refrigerant pipe shall be routed inside a protective sleeve to prevent insulation deterioration Table 16 Utility Conduit Sizes Inches 1 OD pipe diameter in inc...
Page 62: ...ing connection as shown and tighten the flare nut initially by hand 3 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow the guidelines as outlined in Table 18 for the amount of torque to use When tightening the flare nut with torque wrench ensure the direc tion for tightening follows the ar row on the wrench Tubing cover Figure 40 LSU240HEV1 Outdoor Unit Connectio...
Page 63: ...the field Single Zone Mega refrigeration system com ponents contain very small capillary tubes small orifices electronic expansion valves oil separators and heat exchangers that can easily become blocked Proper system operation depends on the installer using best practices and utmost care while assembling the piping system see Figure 45 While brazing use a dry nitrogen purge operating at a minimum...
Page 64: ... L 2 N L N 3 90 120HXV Figure 49 Circuit Breaker Separately wire the high and low voltage lines There is a risk of electric shock physical injury or death Use heat proof electrical wire capable of withstanding temperatures up to 167 F to avoid wiring malfunction and electrical shock which may cause physical injury or death Ensure you connect the wire firmly Loose wiring may cause unit malfunction ...
Page 65: ...EFRIGERANT DESIGN 65 Electrical Connections Mechanical Specifications ELECTRICAL CONNECTIONS Figure 50 Terminal Block Wiring Diagram LS090HEV1 LS090HEV1 208 230 VA C Figure 51 Terminal Block Wiring Diagram LS120HEV1 LS120HEV1 208 230 VA C LS180HEV1 LS240HEV1 LSU090HXV LSU120HXV N 2 L2 N 1 L1 Figure 52 Terminal Block Wiring Diagram LS180HEV1 LS240HEV1 Figure 53 Terminal Block Wiring Diagram LS090HX...
Page 66: ...omponents including a refriger ant strainer check valves oil separator accumulator four way reversing valve EEV high and low side charging ports service valves and interconnecting piping Refrigeration Oil Control Heat Pump outdoor units have a centrifugal oil separator and controls to ensure suf ficient oil supply is maintained and that oil does not travel with the refrigerant Compressors The outd...
Page 67: ... Maximum Overcurrent Protection BUS Binary Unit System MSC Maximum Starting Current CFM Cubic Feet per Minute NC Noise Criterion regarding Sound Pressure Levels COP Coefficient Of Performance NEC National Electrical Code CR Combination Ratio ODU Outdoor Unit DB Dry Bulb PCB Printed Circuit Board dB A Decibels with A frequency weighting PCM Pre Coated Metal DDOAS Decoupled Dedicated Outdoor Air PDI...
Page 68: ...Alpharetta Georgia 30009 www lghvac com EM SZ_Mega_Mega115V 4 15 Supersedes EM SZ_Mega_Mega115V 10 14 DFS EM AL 001 US_014D09 20001747 ISO 9001 2008 LG ELECTRONICS INC LG Electronics Commercial Products Support 1 888 865 3026 USA Follow the prompts for commercial A C products ...
