SINGLE-ZONE CEILING-CONCEALED DUCTED SYSTEM ENGINEERING MANUAL Single-Zone Ceiling-Concealed Ducted Heat Pump Systems 3/4 to 3 Tons Low Static LD097HV4 (9,000 Btu/h) LD127HV4 (12,000 Btu/h) High Static LH247HV (24,000 Btu/h) High Static LH367HV (36,000 Btu/h)
PROPRIETARY DATA NOTICE This document, as well 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. For continual product development, LG Electronics U.S.
About LG Electronics, Inc. LG Electronics, Inc. is a global leader and technology innovator in consumer electronics, mobile communications, and home appliances. LG Electronics, Inc. comprises five business units— Home Entertainment, Mobile Communications, Air Conditioning, Business Solutions, and Home Appliance. LG is one of the world’s leading producers of flat panel televisions, audio and video products, mobile handsets, air conditioners, and washing machines.
TABLE OF CONTENTS About LG Electronics, Inc............................................................................................................................................................................................... 3 Duct-Free Split (DFS) Systems....................................................................................................................................................................................... 3 Ducted (High Static) System Data..........................
Multi F and Multi F MAX Heat Pump System Engineering Manual INTRODUCTION “Architectural Appeal” on page 6
ARCHITECTURAL APPEAL Convergence of Technological Innovation with Flexibility and Style Ceiling-Concealed Ducted System Engineering Manual Single-Zone Ceiling-Concealed Ducted Systems A ceiling-concealed ducted system provides a system designer an edge to engineer a system with individual control, and design flexibility with advanced controls.
PRODUCT DATA “Product Features and Benefits” on page 8 “Unit Nomenclature” on page 9 “General Data” on page 10 “Electrical Data” on page 13 “Dimensions” on page 14 “Acoustic Data” on page 20 “External Static Pressure” on page 22 “Refrigerant Flow Diagrams” on page 24 “Wiring Diagrams” on page 29 “Accessories” on page 35
PRODUCT FEATURES AND BENEFITS Ceiling-Concealed Ducted Systems Ceiling-Concealed Ducted System Engineering Manual Single zone ceiling-concealed ducted systems are equipped with inverter components that offer superior load matching and long piping installation. The product works for optimizing power consumption in residential and small office buildings. Using a ducted indoor unit with custom temperature controls allow for precise temperature settings in each zone of the building.
UNIT NOMENCLATURE L A N 090 H SV 4 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 No N or U: System Product Data Nominal Capacity (Nominal cooling capacity in Btu/h): 09 = 9,000 30 = 30,000 12 = 12,000 36 = 36,000 18 = 18,000 42 = 42,000 24 = 24,000 54 = 54,000 System Type: H = Heat Pump Style: SV = High Efficiency Inverter V
GENERAL DATA Ceiling Concealed Ducted Pairing Table The following table shows the available outdoor and indoor unit, along with the factory provided controller.
GENERAL DATA / SPECIFICATIONS EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. This unit comes with a dry helium charge. This data is rated 0 ft above sea level, with 24.6 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB); and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Ceiling-Concealed Ducted System Engineering Manual GENERAL DATA / SPECIFICATIONS Table 3: Ceiling-Concealed Ducted (High Static) System General Data. Type Single Zone Ceiling-Concealed Ducted (High Static) System (Model) (Indoor Unit / Outdoor Unit) LH247HV (LHN247HV / LUU247HV) LH367HV (LHN367HV / LUU367HV) 9,700 ~ 24,000 ~ 26,700 16,000 ~ 36,000 ~ 41,400 Cooling Capacity (Min/Rated/Max) (Btu/h) 2.00 2.91 Cooling Power Input1 (kW) 12.0 12.1 EER (OD 95°F) 17.0 17.
ELECTRICAL DATA Electrical Data Table 4: Electrical Data. Condenser Fan Motor(s) Condenser Condenser Fan Fan Quantity. Motor FLA Unit Model No. Hertz Voltage Voltage Range (Min. to Max.) MCA MOP Compressor Quantity Compressor Motor RLA (Cooling) 3/4 1 LUU097HV LUU127HV 60 208 - 230 187 - 253 11.9 12.3 15 1 9.0 1 0.25 2 3 LUU247HV LUU367HV 60 208 - 230 187 - 253 18.1 24.5 30 40 1 13.5 18.0 1 2 0.6 0.6 x 2 Nominal Tons Low Static High Static Voltage tolerance is ±10%.
OUTDOOR UNIT DIMENSIONS LUU097HV, LUU127HV Figure 2: LUU097HV, LUU127HV Outdoor Unit Dimensions. 1-3/16 2-9/16 17-11/16 11-11/32 6-5/8 15-11/16 30-5/16 19-11/16 1 2-23/32 13/16 21-15/32 12-31/32 13-29/32 2-3/32 4 - LD.
OUTDOOR UNIT DIMENSIONS LUU247HV Job Name/Location: Outdoor Unit (ODU) ‐ LUU247HV Single Zone High Static Duct Figure 3: LUU247HV Outdoor Unit Dimensions. Tag #: Date: PO No.: Product Data For continual product development, LG reserves the right to change specifications without notice. Due to our continuous product innovation, may change without notification. © LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved.
OUTDOOR UNIT DIMENSIONS LUU367HV Job Name/Location: Outdoor Unit (ODU) ‐ LUU367HV Single Zone High Static Duct Date: PO No.: Ceiling-Concealed Ducted System Engineering Manual Figure 4: LUU367HV Outdoor Unit Dimensions. Tag #: For continual product development, LG reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG Life’s Good” is a registered trademark of LG Corp. /www.lghvac.
INDOOR UNIT DIMENSIONS LDN097HV4, LDN127HV4 Figure 5: LDN097HV4, LDN127HV4 Indoor Unit Dimensions. Product Data 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.
INDOOR UNIT DIMENSIONS LHN247HV Job Name/Location: Indoor Unit (IDU) ‐ LHN247HV Single Zone High Static Duct Date: PO No.: Ceiling-Concealed Ducted System Engineering Manual Figure 6: LHN247HV Indoor Unit Dimensions. Tag #: For continual product development, LG reserves the right to change specifications without notice. LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG Life’s Good” is a registered trademark of LG Corp. /www.lghvac.
INDOOR UNIT DIMENSIONS LHN367HV Job Name/Location: Indoor Unit (IDU) ‐ LHN367HV Single Zone High Static Duct Figure 7: LHN367HV Indoor Unit Dimensions. Tag #: Date: PO No.: Product Data For continual product development, LG reserves the right to change specifications without notice. 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.
ACOUSTIC DATA Outdoor Units Figure 8: Ceiling-Concealed Ducted Outdoor Unit Sound Pressure Level Measurement Location. Table 5: Ceiling-Concealed Ducted Outdoor Unit Sound Pressure Levels (dB[A]). NC-60 NC-55 NC-50 NC-45 NC-40 NC-35 NC-30 NC-25 Model Low Static D 3.3 ft. Sound Pressure Levels (dB[A]) Cooling Heating LUU097HV LUU127HV 47 49 51 52 LUU247HV LUU367HV 48 52 52 54 High Static Figure 9: Ceiling-Concealed Ducted Outdoor Unit Sound Pressure Level Diagrams.
NC-55 NC-50 NC-45 NC-40 NC-35 NC-30 NC-25 0 SUCTION DUCT 4.9 ft. DUCT 6.6 ft. 3.3 ft. LDN097HV4 LDN127HV4 30 31 26 28 23 27 LHN247HV LHN367HV 38 39 36 38 35 37 High Static Figure 11: Ceiling-Concealed Ducted Indoor Unit Sound Pressure Level Diagrams.
EXTERNAL STATIC PRESSURE Indoor Units Table 7: Ceiling-Concealed Ducted (Low Static) Indoor Unit External Static Pressure Setting Values Table. Static Pressure (in. wg) 0.0 0.04 0.08 Model No. / Nominal Capacity Airflow Rate / CFM of System (Btu/h) Ceiling-Concealed Ducted System Engineering Manual LDN097HV4 9,000 LDN127HV4 12,000 0.12 0.16 0.20 Setting Value (in.
EXTERNAL STATIC PRESSURE Indoor Units Setting the External Static Pressure on the Remote Controller Use this function to set the wind strength for each airflow level. • The external static pressure must be set by a trained service provider, and it must be set correctly. If the external static pressure is set incorrectly, the product may malfunction. • Do not alter the external static pressure value that corresponds to each airflow level. • External static pressure values vary according to the model.
OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM LUU097HV and LUU127HV Figure 12: LUU097HV and LUU127HV Ceiling-Concealed Ducted (Low Static) Outdoor Unit Refrigerant Flow Diagram.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM LDN097HV4 Figure 13: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Refrigerant Flow Diagram. : Cooling : Heating Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Sirocco Fan M Product Data Indoor Unit Indoor Air Temperature Thermistor Table 10: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM LDN127HV4 Figure 14: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Flow Diagram. Ceiling-Concealed Ducted System Engineering Manual : Cooling : Heating Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Sirocco Fan M M Indoor Unit Indoor Air Temperature Thermistor Table 12: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No.
OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM LUU247HV and LUU367HV Figure 15: LUU247HV and LUU367HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Refrigerant Flow Diagram.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM LHN247HV and LHN367HV Figure 16: LHN247HV and LHN367HV Ceiling-Concealed Ducted (High Static) Indoor Unit Refrigerant Flow Diagram.
OUTDOOR UNIT WIRING DIAGRAM LUU097HV and LUU127HV Figure 17: LUU097HV and LUU127HV Ceiling-Concealed (Low Static) Ducted Outdoor Unit Wiring Diagram. Product Data 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.
INDOOR UNIT WIRING DIAGRAM LDN097HV4, LDN127HV4 Ceiling-Concealed Ducted System Engineering Manual Figure 18: LDN097HV4 and LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Wiring Diagram. 30 | DUCTED 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.
OUTDOOR UNIT WIRING DIAGRAM LUU247HV Figure 19: LUU247HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Wiring Diagram. Product Data 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.
OUTDOOR UNIT WIRING DIAGRAM LUU367HV Ceiling-Concealed Ducted System Engineering Manual Figure 20: LUU367HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Wiring Diagram. 32 | DUCTED 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.
INDOOR UNIT WIRING DIAGRAM LHN247HV Figure 21: LHN247HV Ceiling-Concealed Ducted (High Static) Indoor Unit Wiring Diagram. Product Data 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.
INDOOR UNIT WIRING DIAGRAM LHN367HV Ceiling-Concealed Ducted System Engineering Manual Figure 22: LHN367HV Ceiling-Concealed Ducted (High Static) Indoor Unit Wiring Diagram. 34 | DUCTED 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.
ACCESSORIES Functions, Controls, and Options Table 17: Indoor Units—Functions, Controls and Options. 1 2 Air supply outlets Airflow steps (fan/cool/heat) Washable anti-fungal1 Drain pump E.S.P.
ACCESSORIES LGMV Diagnostic Software Ceiling-Concealed Ducted System Engineering Manual LG Monitoring View (LGMV) Diagnostic Software and Cable LGMV software allows the service technician 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.
PERFORMANCE DATA “Cooling Capacity Data” on page 38 “Heating Capacity Data” on page 42
PERFORMANCE DATA Cooling Capacity Tables Table 19: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table. Model No. / Outdoor Nominal Capacity Air Temp. (Btu/h) (°F DB) Ceiling-Concealed Ducted System Engineering Manual -4 LD097HV4 / 9,000 68 / 57 TC SHC 8.85 6.84 PI 73 / 61 TC SHC 0.42 9.40 7.23 PI Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI TC 86 / 72 SHC PI TC 90 / 75 SHC PI 0.44 9.95 11.05 7.21 0.47 11.60 7.34 0.47 | DUCTED 0.
PERFORMANCE DATA Cooling Capacity Tables Table 20: LD127HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table. Model No. / Outdoor Nominal Capacity Air Temp. (Btu/h) (°F DB) -4 LD127HV4 / 12,000 68 / 57 TC SHC 11.40 9.03 PI 73 / 61 TC SHC PI 0.53 12.11 0.55 9.54 Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI 12.82 9.24 0.57 13.33 9.43 0.58 TC 86 / 72 SHC PI TC 90 / 75 SHC PI 14.24 9.51 0.59 14.95 9.69 0.60 0 11.40 9.08 0.54 12.11 9.
PERFORMANCE DATA Cooling Capacity Tables Table 21: LH247HV Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table. Model No. / Outdoor Nominal Capacity Air Temp. (Btu/h) (°F DB) Ceiling-Concealed Ducted System Engineering Manual 5 LH247HV 24,000 68 / 57 TC SHC 23.77 19.04 PI 0.80 73 / 61 TC SHC 25.25 20.11 PI 1.08 Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI 26.73 | DUCTED 1.17 27.79 19.88 1.19 86 / 72 SHC PI TC 90 / 75 SHC PI 29.68 20.05 1.19 31.
PERFORMANCE DATA Cooling Capacity Tables Table 22: LH367HV Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table. Model No. / Outdoor Nominal Capacity Air Temp. (Btu/h) (°F DB) 5 LH367HV 36,000 68 / 57 TC SHC 35.66 26.60 PI 1.16 73 / 61 TC SHC 37.87 28.10 PI 1.57 Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI 40.09 28.93 1.70 41.69 27.78 1.73 TC 86 / 72 SHC PI TC 90 / 75 SHC PI 44.52 28.02 1.73 46.73 28.55 1.73 10 35.61 26.80 1.19 37.82 28.
PERFORMANCE DATA Heating Capacity Tables Table 23: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Heating Capacity Table. Ceiling-Concealed Ducted System Engineering Manual Model No. / Nominal Capacity (Btu/h) LD097HV4 / 9,000 Outdoor Air Temp. °F DB °F WB -4 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -4.4 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 TC 61 8.12 8.58 9.14 9.66 10.35 10.81 11.58 12.36 13.14 13.81 14.65 14.99 15.03 15.10 15.18 15.22 15.26 PI 0.86 0.89 0.93 0.97 1.
PERFORMANCE DATA Heating Capacity Tables Table 25: LH247HV Ceiling-Concealed Ducted (High Static) System Heating Capacity Table. Model No. / Nominal Capacity (Btu/h) LH247HV 24,000 Outdoor Air Temp. °F DB °F WB 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 TC 61 13.59 15.90 17.45 19.15 20.18 21.90 23.63 25.35 26.64 28.26 28.90 28.99 29.13 29.27 29.35 29.44 PI 1.70 1.73 1.75 1.78 1.81 1.85 1.90 1.95 2.00 2.07 2.10 2.09 2.07 2.04 2.03 2.
Ceiling-Concealed Ducted System Engineering Manual 44 | DUCTED 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.
APPLICATION GUIDELINES “Equipment Selection Procedure” on page 46 “Building Ventilation Design Guide” on page 48 “Placement Considerations” on page 53
EQUIPMENT SELECTION PROCEDURE Cooling / Heating Correction Factors For Ceiling-Concealed Ducted systems, calculate the equivalent length of the liquid line from the 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 below. Multiply the correction factors by the cooling or heating capacity obtained from the capacity table using design conditions.
EQUIPMENT SELECTION PROCEDURE Defrost Correction Factor for Heating Operation The outdoor unit heating capacity may need to be adjusted for frost accumulation on air-cooled systems. If design day conditions are below the dewpoint of the surrounding air, frost may not be a problem and no correction factor is needed. In certain weather conditions, however, frost may form and accumulate on the air-cooled outdoor unit coil and impact the coils ability to transfer heat.
BUILDING VENTILATION DESIGN GUIDE Ceiling-Concealed Ducted System Engineering Manual ASHRAE Standards 62.1 and 62.2 (depending on if the building is residential or commercial), and local codes specify the minimum volume of airflow that must be provided to an occupied space.
BUILDING VENTILATION DESIGN GUIDE Method 2: Unconditioned Outdoor Air (Non-Ducted, Fan Assisted Ventilation) When approved by local codes, the fan assisted ventilation method uses exhaust fans to remove air from the building, and outdoor 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.
BUILDING VENTILATION DESIGN GUIDE Method 3: Unconditioned Outdoor Air Ducted to Indoor Units Ceiling-Concealed Ducted System Engineering Manual Untreated outdoor air is channeled through a duct system that is piped to the return air duct on Duct-Free Split system ducted indoor units or to the frame of Duct-Free Split system four-way cassettes. Outside air may flow backward through the return air-filter grille when the indoor unit fan speed slows or stops in response to changes in the space load.
BUILDING VENTILATION DESIGN GUIDE Method 4: Coupled Dedicated Outdoor Air (CDOA) A separate, dedicated outdoor air system delivers air directly to a Duct-Free Split system indoor unit or to the return air duct system. After mixing with the return air stream, ventilation air passes through the indoor unit and into the conditioned space. The pretreatment system is capable of filtering, conditioning, and dehumidifying outdoor air to room neutral conditions.
BUILDING VENTILATION DESIGN GUIDE Method 5: Decoupled Dedicated Outdoor Air System (DDOAS) Provide a separate, dedicated outdoor-air system designed to filter, condition, and dehumidify ventilation air and deliver it directly to the conditioned space through a separate register or grille. This approach requires a separate independent ventilation duct system not associated with the Duct-Free Split system. Advantages • May be used with the full lineup of Duct-Free Split system indoor units.
PLACEMENT CONSIDERATIONS Indoor Unit Selecting the Best Location for the Indoor Unit The unit should not be installed where sulfuric acid and flammable or corrosive gases are generated, vented into, or stored. There is risk of fire, explosion, and physical injury or death. Don’ts • No obstacles to air circulation around the unit; keep proper distances from ceilings, doorways, floor, walls, etc.
PLACEMENT CONSIDERATIONS Indoor Unit Figure 29: Low Static Ducted Indoor Unit General Service Space Required Dimensions and Bolt Locations Top view E (Unit : Inch) G Control box Access Opening ( 23-5/8 x 23-5/8 ) 23-5/8 J A B (Unit : Inch) Side view I 23-5/8 F Ceiling-Concealed Ducted System Engineering Manual D C H = ≤25/32 H • "H" dimension is necessary to ensure a slope is included for condensate drainage. Drainage hole Table 31: Low Static Ducted Indoor Unit Bolt Location Dimensions.
PLACEMENT CONSIDERATIONS Indoor Unit Figure 33: High Static Ducted Indoor Unit Access Panel and General Service Space Required Dimensions. Figure 34: High Static Ducted Indoor Unit Bolt Locations. A B C E 23-5/8 inches x 23-5/8 inches D 23-5/8 inches F G Application Guidelines I 39-3/8 inches 23-5/8 inches H H = ≥25/32 inches Drain hole Table 33: High Static Ducted Indoor Unit Bolt Location Dimensions.
PLACEMENT CONSIDERATIONS Outdoor Unit Selecting the Best Location for the Outdoor Unit DANGER Ceiling-Concealed Ducted System Engineering Manual To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. Failure to do so will cause serious bodily injury or death. Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it.
PLACEMENT CONSIDERATIONS Outdoor Unit Tie-Downs / Wind Restraints and Lightening Protection The strength of the Ceiling-Concealed Duct (High Static) system outdoor unit frame is adequate to be used with field-provided wind restraint tie-downs. Tie-Downs / Wind Restraints • The strength of the roof must be checked before installing the outdoor units.
PLACEMENT CONSIDERATIONS Outdoor Unit Bolting the Outdoor Unit to the Platform Figure 39: Bolting the LUU247HV Outdoor Unit to the Platform. Minimum 7-7/8 inches Minimum 3-15/16 inches Minimum 15-3/4 inches Minimum 24-13/32 inches Minimum 14-19/32 inches Minimum 22-3/16 inches Figure 40: Bolting the LUU367HV Outdoor Unit to the Platform. Unit: Inch Table 35: Outdoor Unit Foundation Specifications.
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 on the following pages. • Include enough space for airflow and for service access.
PLACEMENT CONSIDERATIONS Outdoor Unit Outdoor Unit (36,000 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.
PLACEMENT CONSIDERATIONS Outdoor Unit are obstacles on both suction Obstacles andthere on the Obstacles above and on above the Where and discharge sides (discharge side obstacle air discharge side. air discharge side. is higher than" the outdoor unit).
REFRIGERANT PIPING DESIGN & LAYOUT BEST PRACTICES “Design Guideline Summary” on page 63 “Selecting Field-Supplied Copper Tubing” on page 64 “Refrigerant Piping System Layout” on page 65 “Piping Insulation” on page 70 “Condensate Drain Piping” on page 71
REFRIGERANT PIPING DESIGN Design Guideline Summary Device Connection Limitations A single-zone ceiling-concealed ducted system consists of one outdoor unit and one indoor unit. One of the most critical elements of a single-zone ceiling-concealed ducted system is the refrigerant piping.
REFRIGERANT PIPING DESIGN Selecting Field-Supplied Copper Tubing Figure 46: Coiled Expansion Loops and Offsets. L L L R R R L L L R R Ceiling-Concealed Ducted System Engineering Manual L L L R Large Tubing U-bend (>3/4 in.) Small Tubing U-bend (<3/4 in.) Loop Table 39: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.
REFRIGERANT PIPING DESIGN Refrigerant Piping System Layout Definitions Physical Pipe Length: Actual length of straight segment(s) of pipe. Equivalent Pipe Length: Actual length of pipe plus equivalent lengths of long radius elbows, Y-branches, and valves. Layout Procedure Using Elbows Table 41: Equivalent Piping Length for Piping Components. Field-supplied elbows are allowed as long as they are long radius and designed for use with R410A refrigerant.
INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout No Pipe Size Substitutions Use only the pipe size as conveyed in the product installation instructions. Using a different size is prohibited and may result in a system malfunction or failure to work at all. Figure 48: Installing an Insert Into a Concrete Beam. Inserts An insert can be installed into a floor or beam before the concrete sets so that fittings such as ducts, pipes, or suspension bolts can be added at a later time.
INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve. Underground refrigerant pipe shall be routed inside a protective sleeve to prevent insulation deterioration.
REFRIGERANT PIPING DESIGN Refrigerant Piping System Layout Single Zone Ducted Outdoor Unit Connections Ceiling-Concealed Ducted System Engineering Manual 1. Remove the connection cover from the unit by loosening the screws. 2. Align the center of the refrigerant pipe and corresponding connection. 3. Place a couple of drops of refrigerant oil on the opening rim of the flare before assembling. Ensure you do not add any contaminants. Tighten the flare nut initially by hand. 4.
REFRIGERANT PIPING DESIGN Refrigerant Piping System Layout Brazing Practices Keep the piping system free of contaminants and debris such copper burrs, slag, or carbon dust during installation. Flare Connection Practices • Improperly installed flare connections can lead to refrigerant leaks. • When tightening the flare unit with a torque wrench, ensure the direction for tightening follows the arrow on the wrench. 1.
REFRIGERANT PIPING DESIGN Refrigerant Piping System Layout Refrigerant Piping System Insulation Ceiling-Concealed Ducted System Engineering Manual All refrigerant piping including connections, field-provided isolation ball valves, service valves, and elbows shall be completely insulated using closed cell pipe insulation. To prevent heat loss/heat gain through the refrigerant piping, all refrigerant piping including liquid lines and vapor lines shall be insulated separately.
REFRIGERANT PIPING DESIGN Condensate Drain Piping Condensate Drain Piping Condensate drain piping should be constructed out of materials approved by local codes (generally PVC). Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope should not be straight up and down, and support hangers should be used at 3-5/16 to 5 foot intervals to keep the condensate drainage system stable. The inside temperature of the drain piping can rise to about 50°F.
ELECTRICAL CONNECTIONS Outdoor Unit Power Wiring / Communications Cable Connections Ceiling-Concealed Ducted System Engineering Manual LUU097HV, LUU127HV, LUU187HV, LUU247HV Outdoor Unit Connections Figure 63: LUU097, 127HV Outdoor Unit Terminal Block Location. 1. Remove the cover or control cover from the unit by loosening the fastening screws. 2. Take off the caps on the conduit panel. 3. Connect both the power supply and low voltage lines to the corresponding terminals on the terminal block. 4.
ELECTRICAL CONNECTIONS Ducted Indoor Unit Power Wiring / Communications Cable Connections Using a Conduit 1. Remove the rubber stopper on the indoor unit. Pass the power wiring / communications cable through the conduit, the conduit mounting plate, and to / through the control panel of the indoor unit. 2. Connect the power wiring / communications cable to the indoor unit terminal block. 3. Screw the conduit mounting plate to the indoor unit. 4. Tighten the conduit and the conduit mounting plate together.
ELECTRICAL CONNECTIONS Wiring Connections Figure 69: Detailed Power / Communications System Schematic.
TECHNICAL DATA “Mechanical Specifications” on page 76 “Acronyms” on page 78
MECHANICAL SPECIFICATIONS Ceiling-Concealed Ducted System General Ceiling-Concealed Ducted System Engineering Manual System LG single zone ceiling-concealed ducted system comprises of a single frame outdoor unit connected to a single indoor unit with a single refrigerant circuit. An LG single zone ceiling-concealed ducted system is a DFS system that can operate in either cooling or heating mode.
MECHANICAL SPECIFICATIONS Ceiling-Concealed Ducted System Coil Outdoor Unit Heat pump outdoor unit coils are made of nonferrous louvered aluminum fins protected with an integral coil guard. The coil for each outdoor unit has a minimum of 14 fins per inch (FPI); heat exchanger has two rows. The coil fins have a factory applied corrosion resistant GoldFin™ material with hydrophilic coating tested in accordance with ASTM B-117 salt spray test procedure for a minimum of 1,000 hours.
ACRONYMS Ceiling-Concealed Ducted System Engineering Manual Table 47: Table of Acronyms.
20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta, Georgia 30022 www.lg-dfs.com LG Electronics Commercial Products Support 1-888-865-3026 USA Follow the prompts for commercial A/C products.
