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LG LC188HHV4 Engineering Manual

Four-way ceiling-cassette system
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Single-Zone Four-Way
Ceiling-Cassette
Heat Pump Systems
1.5 to 4 Tons
LC188HHV4 (18,000 Btu/h)
CEILING-CASSETTE SYSTEM
ENGINEERING MANUAL
LC249HHV (24,000 Btu/h)
SINGLE-ZONE
FOUR-WAY
LC369HHV (36,000 Btu/h)
LC429HHV (42,000 Btu/h)
LC489HHV (48,000 Btu/h)

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  Summary of Contents for LG LC188HHV4

  • Page 1 SINGLE-ZONE FOUR-WAY CEILING-CASSETTE SYSTEM ENGINEERING MANUAL Single-Zone Four-Way Ceiling-Cassette Heat Pump Systems 1.5 to 4 Tons LC369HHV (36,000 Btu/h) LC188HHV4 (18,000 Btu/h) LC249HHV (24,000 Btu/h) LC429HHV (42,000 Btu/h) LC489HHV (48,000 Btu/h)
  • Page 2 For more technical materials such as submittals, catalogs, installation, best practices, building ventilation, owner’s, and service manuals, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS Unit Nomenclature ..........................................4 LG Air Conditioner Technical Solution (LATS) .................................5-6 LGRED° Four-Way Ceiling-Cassette Product Data ..............................7-41 ......................................8-9 General Data .........................................10-12 Electrical Data ..........................................13 Functions, Controls, and Options ....................................14 Outdoor Unit Dimensions ......................................15-16 Outdoor Unit Center of Gravity / Corner Weights ...............................17 Indoor Unit Dimensions ......................................18-20...
  • Page 4: Unit Nomenclature

    UNIT NOMENCLATURE Single-Zone Indoor Units and Outdoor Units L = LG Frame Type: A: Art Cool™ S: Standard C: Four-Way Ceiling-Cassette D: Ceiling-Concealed Duct (Low Static) H: Ceiling-Concealed Duct (High Static) V: Vertical-Horizontal Air Handling N: Indoor Unit U: Outdoor Unit...
  • Page 5: Lg Air Conditioner Technical Solution (Lats)

    Contact your LG Rep for the best software program for your application. To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all projects.
  • Page 6 LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
  • Page 7: Lgred° Four-Way Ceiling-Cassette Product Data

    PRODUCT DATA Mechanical Specifications on page 8 General Data on page 10 Electrical Data on page 13 Functions, Controls, and Options on page 14 Outdoor Unit Dimensions on page 15 Outdoor Unit Center of Gravity / Corner Weights on page 17 Indoor Unit Dimensions on page 18 Acoustic Data on page 21 Refrigerant Flow Diagrams on page 25...
  • Page 8 Ceiling Cassette System (LC188HHV4). System direction. A guide vane LG single zone four-way ceiling cassette system comprises of a algorithm sequentially single frame outdoor unit connected to a single indoor unit with a changes the predominant single refrigerant circuit.
  • Page 9 MECHANICAL SPECIFICATIONS Frequency ranges for the 18,000 ~ 48,000 Btu/h outdoor Air Filter - Indoor Figure 4: Four-Way 36,000 to 48,000 Btu/h 3x3 Ceiling Cassette units are: Unit System (LC369HHV, LC429HHV, 18k, 24k Btu/h = 10 to 95 Hz Cooling; 10 to 130 Hz Heating Return air is filtered with a and LC489HHV Models).
  • Page 10: General Data

    GENERAL DATA Pairing Table The following table shows the available outdoor and indoor unit, along with the factory provided controller. Table 1: Four-Way Ceiling Cassette System Pairing Table Outdoor Unit Model Indoor Unit Model Controller LUU180HHV LCN188HV4 PQWRHQ0FDB LUU240HHV LCN249HV AKB75735404 LUU360HHV, LUU420HHV, LUU480HHV LCN369HV...
  • Page 11 GENERAL DATA Table 2: Single-Zone LGRED Four-Way 2 x 2 Ceiling Cassette System General Data. System (Model) (Indoor Unit / Outdoor Unit) LC188HHV4 (LCN188HV4 / LUU180HHV) Ceiling Grille Model Number (Sold Separately) PT-UQC / PT-QCHW0 Cooling Capacity (Min ~ Rated ~ Max) (Btu/h)
  • Page 12 GENERAL DATA Table 3: Single-Zone LGRED Four-Way 3 x 3 Ceiling Cassette System General Data. LC249HHV LC369HHV LC429HHV LC489HHV System (Model) (Indoor Unit / Outdoor Unit) (LCN249HV/ (LCN369HV/ (LCN429HV/ (LCN489HV/ LUU240HHV) LUU360HHV) LUU420HHV) LUU480HHV) Ceiling Grille Model Number (Sold Separately) PT-AAGW0 PT-AAGW0 PT-AAGW0...
  • Page 13: Electrical Data

    MCA MOP Rotor Tons Quantity (Min. to Max.) Amps Cooling Heating 2 x 2 Four-Way Ceiling Cassettes 1-1/2 LC188HHV4 208 - 230 187 - 253 14.5 14.5 460 x 1 1.6 x 1 3 x 3 Four-Way Ceiling Cassettes LC249HHV 14.5 14.5...
  • Page 14: Functions, Controls, And Options

    = Unit option X = Not Available Primary washable filter. 14”x14”x1” for 2x2 units; 20.5”x20.5”x1” for 3x3 units. Not all controllers can support all features. Requires wired zone controller. Contact your LG representative for details. 14 | PRODUCT DATA ©...
  • Page 15: Outdoor Unit Dimensions

    OUTDOOR UNIT DIMENSIONS LUU180HHV, LUU240HHV Figure 5: LUU180HHV, LUU240HHV Outdoor Unit Dimensions. © PRODUCT DATA | 15...
  • Page 16 OUTDOOR UNIT DIMENSIONS LUU360HHV, LUU420HHV, LUU480HHV Figure 6: LUU360HHV, LUU420HHV, LUU480HHV Outdoor Unit Dimensions. 16 | PRODUCT DATA ©...
  • Page 17: Outdoor Unit Center Of Gravity / Corner Weights

    OUTDOOR UNIT CENTER OF GRAVITY / CORNER WEIGHTS Figure 7: LUU180HHV and LUU240HHV Center of Gravity and Corner Weight Diagram. Table 6: LUU180HHV and LUU240HHV Center of Gravity and Corner Weights. Weight (lb.) Center of Gravity (in.) Leg (in.) Corner Weight (lb.) Model No.
  • Page 18: Indoor Unit Dimensions

    INDOOR UNIT DIMENSIONS LCN188HV4 Figure 9: LCN188HV4 Indoor Unit Dimensions. (279) 7-61/64 (202) 6-3/16 2-51/64 (157) (71) 7-61/64 (202) 7-9/16 (192) Max. Condensate Lift: 31-1/2 (800) or less 23-5/8 (600) (Ceiling Opening) 20-23/64 (517) (Hanging Bolt) 10-13/64 (259) 7-13/64 (183) 1-11/32 10-13/64 (259) 14-29/32 (379)
  • Page 19 INDOOR UNIT DIMENSIONS LCN249HV Figure 10: LCN249HV Indoor Unit Dimensions. © PRODUCT DATA | 19...
  • Page 20 INDOOR UNIT DIMENSIONS LCN369HV, LCN429HV, LCN489HV Figure 11: LCN369HV, LCN429HV, LCN489HV Indoor Unit Dimensions. 20 | PRODUCT DATA ©...
  • Page 21: Acoustic Data

    ACOUSTIC DATA Indoor Units Figure 12: Indoor Unit Sound Pressure Level • Measurements taken with no attenuation and units operating at full load normal Measurement Location. operating condition. • Sound level will vary depending on a range of factors such as construction (acoustic absorption coefficient) of particular area in which the equipment is installed.
  • Page 22 ACOUSTIC DATA Indoor Units Table 9: Four-Way Ceiling Cassette Indoor Unit Sound Power Levels • Data is valid under diffuse field conditions. (dB[A]). • Data is valid under nominal operating conditions. • Sound power level is measured using rated conditions, and tested Model Sound Power Levels (dB[A]) in a reverberation room per ISO 3741 standards.
  • Page 23 ACOUSTIC DATA Outdoor Units Figure 15: Four-Way Ceiling Cassette Outdoor Unit • Measurements taken with no attenuation and units operating at full load normal Sound Pressure Level Measurement Location. operating condition. • Sound level will vary depending on a range of factors such as construction (acous- tic absorption coefficient) of particular area in which the equipment is installed.
  • Page 24 ACOUSTIC DATA Outdoor Units • Data is valid under diffuse field conditions. Table 11: Four-Way Ceiling Cassette Outdoor Unit Sound Power Levels (dB[A]). • Data is valid under nominal operating conditions. • Sound power level is measured using rated conditions, and tested Model Sound Power Levels (dB[A]) in a reverberation room per ISO 3741 standards.
  • Page 25: Refrigerant Flow Diagrams

    REFRIGERANT FLOW DIAGRAMS LCN188HV4 Indoor Units Figure 18: LCN188HV4 Refrigerant Flow Diagram. Gas pipe connection port Heat exchanger (flare connection) Heating Evaporator Outlet Cooling Turbo fan Temperature Thermistor Indoor Air Temperature Thermistor Evaporator Inlet Temperature Thermistor Liquid pipe connection port (flare connection) Table 12: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
  • Page 26 REFRIGERANT FLOW DIAGRAMS LCN249HV, LCN369HV Indoor Units Figure 20: LCN249HV, LCN369HV Refrigerant Flow Diagram. Gas Pipe Connection Port Heat Exchanger (Flare Connection) Heating Cooling Evaporator Outlet Turbo Fan Temperature Thermistor Suction Air Temperature Thermistor Humidity Sensor Evaporator Inlet Temperature Thermistor Liquid Pipe Connection Port (Flare Connection) Table 16: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Thermistor...
  • Page 27 REFRIGERANT FLOW DIAGRAMS LCN429HV, LCN489HV Indoor Units Figure 21: LCN429HV, LCN489HV Refrigerant Flow Diagram. : Cooling : Heating (3D Turbo Fan) Table 19: LCN429HV, LCN489HV Four-Way Ceiling Cassette Indoor Unit Thermistor Details. Thermistor Description (Based on Cooling Mode) PCB Connector Indoor Air Temperature Thermistor CN_ROOM Evaporator Inlet Temperature Thermistor...
  • Page 28 REFRIGERANT FLOW DIAGRAMS LUU180HHV, LUU240HV, LUU360HV Outdoor Units Figure 22: LUU180HHV, LUU240HHV, LUU360HHV Refrigerant Flow Diagram. Condenser Outlet Pipe Temperature Thermistor Condenser Middle Pipe Temperature Thermistor Ø3/8 Inch Liquid Side 36,000 Btu/h Outdoor Piping Units have two (2) fans. High Pressure Sensor Vapor Side Piping...
  • Page 29 REFRIGERANT FLOW DIAGRAMS LUU420HHV, LUU480HHV Outdoor Units Figure 23: LUU420HHV, LUU480HHV Refrigerant Flow Diagram. Table 23: LUU420HHV, LUU480HHV Four-Way Ceiling Cassette Outdoor Unit Thermistor Details. Description PCB Connector Discharge Pipe Temperature Thermistor CN_DISCHARGE_BK Suction Pipe Temperature Thermistor CN_SUCTION_GR Condenser Outlet Pipe Temperature Thermistor CN_C_PIPE_VI Air Temperature Thermistor CN_AIR_YL...
  • Page 30: Wiring Diagrams

    WIRING DIAGRAMS LCN188HV4 Indoor Units Figure 24: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. 30 | PRODUCT DATA ©...
  • Page 31 WIRING DIAGRAMS LCN249HV, LCN369HV Indoor Units Figure 25: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. © PRODUCT DATA | 31...
  • Page 32 WIRING DIAGRAMS LCN429HV, LCN489HV Indoor Units Figure 26: LCN429HV, LCN489HV 3x3 Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. 32 | PRODUCT DATA ©...
  • Page 33 WIRING DIAGRAMS LUU180HHV, LUU240HHV Outdoor Units Figure 27: LUU180HHV, LUU240HHV Outdoor Unit Wiring Diagram. 07/20 © PRODUCT DATA | 33...
  • Page 34 WIRING DIAGRAMS LUU360HHV, LUU420HHV, LUU480HHV Outdoor Units Figure 28: LUU360HHV, LUU420HHV, LUU480HHV Outdoor Unit Wiring Diagram. 07/20 34 | PRODUCT DATA ©...
  • Page 35: Electrical Connections

    ELECTRICAL CONNECTIONS General Power Wiring / Communications Cable Guidelines • Follow manufacturer’s circuit diagrams displayed on the inside of the control box cover. • Confirm power source specifications. • Properly ground the outdoor unit and the indoor unit per National Electrical Code (NEC) and local codes. •...
  • Page 36 Optional controllers (see “Functions, Controls, Options”, or contact an LG representative for more information) can connect to the Four-Way Ceiling Cassette indoor unit in one of two different ways. 1. LG Wired Remote Extension Cable with Molex plug (PZCWRC1; sold separately) that connects to the CN-REMO terminal on the indoor unit PCB.
  • Page 37 ELECTRICAL CONNECTIONS to black (ground wire) terminals from the remote controller to the indoor unit terminal blocks. Figure 32: PZCWRC1 LG Wired Remote Extension Cable. Verify the connectors are properly inserted. C/BOX Cable (Plug type) To Indoor Unit SPEED CN-REMO...
  • Page 38: Air Velocity And Temperature Distribution

    AIR VELOCITY AND TEMPERATURE DISTRIBUTION Figure 34: LCN188HV4 Air Velocity and Temperature Distribution Charts. Figure 35: LCN249HV Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: Outer - 30°, Inner - 67° Discharge angle: Outer - 36°, Inner - 70° Air velocity [ft/s] Air velocity [ft/s] 8.9 ft...
  • Page 39 AIR VELOCITY AND TEMPERATURE DISTRIBUTION Figure 36: LCN369HV Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: Outer - 30°, Inner - 67° Discharge angle: Outer - 36°, Inner - 70° Air velocity [ft/s] Air velocity [ft/s] 10.5 ft 10.5 ft 9.8 ft 9.8 ft...
  • Page 40: Accessories

    When connected through the indoor unit, user will not be able to record data. This software can be used to both commission new systems and troubleshoot existing systems. LGMV data can be recorded to a “.CSV” file and emailed to an LG representative to assist with diagnostic evaluations. Recommended Minimum PC Configuration: •...
  • Page 41 SIMs consists of a hardware Wireless Local Area Network (WLAN) module, an interface cable, and a free downloadable application (app) for iOS® or Android™. The user must supply either an Apple® or an Android smart phone; SIMs is not optimized for tablets, and only be used with LG single zone and Multi F systems.
  • Page 42: Lgred° Four-Way Ceiling-Cassette Performance Data

    PERFORMANCE DATA Cooling Capacity Data on page 43 Maximum Cooling Capacity Data on page 48 Heating Capacity Data on page 53 Maximum Heating Capacity Data on page 56 Equipment Selection Procedure on page 59...
  • Page 43: Cooling Capacity

    PERFORMANCE DATA Cooling Capacity LC188HHV4 Cooling Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV) Table 25: LCN188HV4 / LUU180HHV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64...
  • Page 44 PERFORMANCE DATA Cooling Capacity LC249HHV Cooling Capacity Table for LC249HHV (LCN249HV + LUU240HHV) Table 26: LCN249HV / LUU240HHV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 45 PERFORMANCE DATA Cooling Capacity LC369HHV Cooling Capacity Table for LC369HHV (LCN369HV + LUU360HHV) Table 27: LCN369HV / LUU360HHV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 46 PERFORMANCE DATA Cooling Capacity LC429HHV Cooling Capacity Table for LC429HHV (LCN429HV + LUU420HHV) Table 28: LCN429HV / LUU420HHV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 47 PERFORMANCE DATA Cooling Capacity LC489HHV Cooling Capacity Table for LC489HHV (LCN489HV + LUU480HHV) Table 29: LCN489HV / LUU480HHV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 48: Maximum Cooling Capacity

    PERFORMANCE DATA Maximum Cooling Capacity LC188HHV4 Maximum Cooling Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV) Table 30: LCN188HV4 / LUU180HHV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61...
  • Page 49 PERFORMANCE DATA Maximum Cooling Capacity LC249HHV Maximum Cooling Capacity Table for LC249HHV (LCN249HV + LUU240HHV) Table 31: LCN249HV / LUU240HHV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 50 PERFORMANCE DATA Maximum Cooling Capacity LC369HHV Maximum Cooling Capacity Table for LC369HHV (LCN369HV + LUU360HHV) Table 32: LCN369HV / LUU360HHV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 51 PERFORMANCE DATA Maximum Cooling Capacity LC429HHV Maximum Cooling Capacity Table for LC429HHV (LCN429HV + LUU420HHV) Table 33: LCN429HV / LUU420HHV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 52 PERFORMANCE DATA Maximum Cooling Capacity LC489HHV Maximum Cooling Capacity Table for LC489HHV (LCN489HV + LUU480HHV) Table 34: LCN489HV / LUU480HHV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 53: Heating Capacity

    PERFORMANCE DATA Heating Capacity LC188HHV4, LC249HHV Heating Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV) Table 36: LCN188HV4 / LUU180HHV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 7.63 1.15 6.85 1.18 6.95 1.22 6.90...
  • Page 54 PERFORMANCE DATA Heating Capacity LC369HHV, LC429HHV Heating Capacity Table for LC369HHV (LCN369HV + LUU360HHV) Table 37: LCN369HV / LUU360HHV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 9.45 1.94 8.15 2.00 8.49 2.06 8.48 2.09 8.47...
  • Page 55 PERFORMANCE DATA Heating Capacity LC489HHV Heating Capacity Table for LC489HHV (LCN489HV + LUU480HHV) Table 39: LCN489HV / LUU480HHV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 11.12 2.36 9.47 2.43 9.94 2.50 9.95 2.54 9.96 2.57...
  • Page 56: Maximum Heating Capacity

    PERFORMANCE DATA Maximum Heating Capacity LC188HHV4, LC249HHV Maximum Heating Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV) Table 40: LCN188HV4 / LUU180HHV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 17.12 3.33 16.74 3.44...
  • Page 57 PERFORMANCE DATA Maximum Heating Capacity LC369HHV, LC429HHV Maximum Heating Capacity Table for LC369HHV (LCN369HV + LUU360HHV) Table 42: LCN369HV / LUU360HHV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 32.11 5.22 31.40 5.39 30.50 5.57...
  • Page 58 PERFORMANCE DATA Maximum Heating Capacity LC489HHV Maximum Heating Capacity Table for LC489HHV (LCN489HV + LUU480HHV) Table 44: LCN489HV / LUU480HHV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 38.51 5.68 37.65 5.87 36.57 6.06 35.98...
  • Page 59: Equipment Selection Procedure

    16.4 24.6 32.8 49.2 65.6 82.0 98.4 114.8 131.2 147.6 164 180.4 196.9 213.3 229.7 246 Cooling Capacity Coefficient Factor. LC188HHV4 (18,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 LC249HHV (24,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3...
  • Page 60 • Use caution when sizing to meet listed capacity specifications for the scheduled manufacturer’s equipment. If further system design assistance is needed, or you have a unique application you would like to discuss, contact your LG sales rep. 60 | PERFORMANCE DATA...
  • Page 61: Placement Considerations

    APPLICATION GUIDELINES Placement Considerations on page 62 Installing Outdoor Units Indoors on page 70 Refrigerant Piping Design on page 73...
  • Page 62: Indoor Unit

    PLACEMENT CONSIDERATIONS Indoor Unit Selecting the Best Location for the Indoor Unit WARNING explosion, and physical injury or death. Figure 40: Indoor Unit Clearance Requirements. Do’s Ceiling Select a location for installing the indoor units that will meet the following conditions: •...
  • Page 63 PLACEMENT CONSIDERATIONS Indoor Unit • Indoor units (IDUs) should not be placed in an environment where the IDUs will be exposed to harmful volatile organic compounds (VOCs) or in environments where there is improper air make up or supply or inadequate ventilation. If there are concerns about VOCs in the environment where the IDUs are installed, proper air make up or supply and / or adequate ventilation should be provided.
  • Page 64: Outdoor Unit

    PLACEMENT CONSIDERATIONS Outdoor Unit Selecting the Best Location for the Outdoor Unit DANGER • Do not install the unit in an area where combustible gas will generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death. •...
  • Page 65 Model vary based on surrounding ambient conditions and must be calculated and specified by the design (inches) (inches) engineer. LC188HHV4 Insulation thickness (value in parenthesis) = 3/8 inch. LC249HHV, LC369HHV, LC429HHV, Insulation thickness (value in parenthesis) = 1 inch. LC489HHV Insulation thickness (value in parenthesis) = 3/4 inch.
  • Page 66 PLACEMENT CONSIDERATIONS Outdoor Unit Oceanside Applications Figure 45: Oceanside Placement Using Windbreak. Use of a Windbreak to Shield from Sea Wind Windbreak Ocean winds will cause corrosion, particularly on the condenser and • Avoid installing the outdoor unit where it would be directly Sea wind exposed to ocean winds.
  • Page 67 PLACEMENT CONSIDERATIONS Outdoor Unit Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper unit operation. When installing the outdoor unit, consider service, inlet and outlet and minimum allowable space requirements as illustrated in the diagrams below and on the following pages. •...
  • Page 68 PLACEMENT CONSIDERATIONS Outdoor Unit Outdoor Unit (36,000 to 48,000 Btu/h Capacity) Service Access and Allowable Clearances When installing the outdoor unit, consider service, inlet, and outlet, and minimum allowable space requirements as illustrated in the following diagrams. Minimum 11-13/16 Strong Strong wind wind...
  • Page 69 PLACEMENT CONSIDERATIONS Outdoor Unit Obstacles above and on the Where there are obstacles on both suction Obstacle just on the and discharge sides (discharge side obstacle air discharge side. air discharge side. is higher than the outdoor unit). Where there are obstacles above, and on both Where there are obstacles on both suction suction and discharge sides (discharge side obstacle and discharge sides (discharge side obstacle...
  • Page 70: Installing Outdoor Units Indoors

    PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Installing Outdoor Units Indoors Single Zone Cassette outdoor units are engineered to be mounted outdoors and include technology designed to minimize the negative effects of winter weather’s freezing rain, sleet, and snow. Some building projects, however, necessitate placing the HVAC outdoor units indoors: •...
  • Page 71 PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet louver enclosed area. • Install a field-provided drain pan under the outdoor units and provide a path to a nearby floor drain. •...
  • Page 72 PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Open Rate by Louver Radian Figure 50: Open Rate by Louver Radian Formula. ho = h * COS Total Area (A) = H * W Number of Open Spaces (N) = (Number of Louvers - 1) Effective Area (Af) = ho * W * N Louver Open Rate (n) = Af / A Af = A * n...
  • Page 73: Refrigerant Piping Design

    98.4 feet 98.4 feet Measured in Actual Feet) Additional Refrigerant Needed (oz/ft) 0.43 0.43 Figure 52: Typical LC188HHV4 and LC249HHV System Layout. Figure 53: Typical LC369HHV, LC429HHV, and LC489HHV System Layout. Unit = Feet Unit = Feet Max Length = A...
  • Page 74 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.com New Issue: EM_SZ_LGRED_Cassette_09_20...