Engineering Manual

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Table Of Contents

INDOOR UNIT ENGINEERING MANUAL

Indoor Units for Multi-Zone Heat Pump Systems

7,000 to 36,000 Btu/h

MULTI

MAX

MULTI

Art Cool

Mirror Wall-Mounted

Art Cool

Gallery Wall-Mounted

Ceiling-Concealed Duct (High Static)

Four-Way Ceiling Cassette

Summary of content (224 pages)

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MULTI F MULTI F MAX INDOOR UNIT ENGINEERING MANUAL Art CoolTM Mirror Wall-Mounted Art CoolTM Gallery Wall-Mounted Four-Way Ceiling Cassette Ceiling-Concealed Duct (High Static) Indoor Units for Multi-Zone Heat Pump Systems 7,000 to 36,000 Btu/h
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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. EM-MultiFIDU-01-15 For continual product development, LG reserves the right to change specifications without notice. ©LG Electronics Inc.
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MULTI F MULTI F MAX Convergence of Technology, Innovation, Flexibility, & Style.....................................................4 Unit Nomenclature........................................................................6 Outdoor Unit Overview................................................................7 Indoor Unit Overview...................................................................8 Controls and Options Overview..................................................9 Art Cool Mirror Indoor Units.
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CONVERGENCE OF TECHNOLOGY, INNOVATION, FLEXIBILITY, & STYLE Multi F and Multi F MAX Indoor Unit Engineering Manual About LG Electronics, Inc. LG Electronics, Inc. is a global leader and technology innovator in consumer electronics, mobile communications, and home appliances, employing more than 213,000 people in more than 60 countries worldwide. LG Electronics, Inc. comprises five business units—Home Entertainment, Mobile Communications, Air Conditioning, Business Solutions, and Home Appliance.
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PRODUCT INTRODUCTION “Unit Nomenclature” on page 6 “Outdoor Unit Overview” on page 7 “Indoor Unit Overview” on page 8 “Controls and Options Overview” on page 9
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MULTI F MULTI F MAX UNIT NOMENCLATURE Multi-Zone Systems — Indoor Units and Outdoor Units L M AN 12 7 HVT M BD 36 2 0 Multi F and Multi F MAX Indoor Unit Engineering Manual L = LG Type: M = Multi-Zone Component: AN: Art Cool™ Wall-Mounted Indoor Unit N: Standard Wall-Mounted Indoor Unit CN: Four-Way Ceiling-Cassette Indoor Unit DN: Ceiling-Concealed Duct (Low Static) Indoor Unit HN: Ceiling-Concealed Duct (High Static) Indoor Unit VN: Vertical-Horizontal Air Handling Indoor Unit U: Outdoor Uni
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MULTI F MULTI F MAX OUTDOOR UNIT OVERVIEW Table 1: Summary Data—Multi F / Multi F MAX Outdoor Units Outdoor Unit Type Model Number1 Dimensions (W x H x D) (inches) Nominal Cooling Capacity Btu/h2 Net Weight (lbs.) No. of Connectable Indoor Units3 Pipe Connections (inches, O.D.
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MULTI F MULTI F MAX INDOOR UNIT OVERVIEW Table 2: Summary Data—Multi F Indoor Units.
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MULTI F MULTI F MAX CONTROLS AND OPTIONS OVERVIEW Table 3: Summary Data—Zone Controllers. Zone Controller Name Simple Controller with Mode Selection Simple Controller without Mode Selection Case Max. Wire Model / Part No. Color Length (ft.) PQRCVCL0 AKB72955816 White PQRCHCA0 Black 164 Allows control of indoor unit ON / OFF, fan speed, and temperature setpoint for up to 16 indoor units.
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MULTI F MULTI F MAX CONTROLS AND OPTIONS OVERVIEW Table 5: Summary Data— Zone Controller Communication Cables. Name Model No. Max. Wire Length (ft.) Wired Remote Group Control Cable Assembly PZCWRCG3 32 Required when grouping multiple indoor units with a single zone controller. Wired Remote / Group Control Extension Cable PZCWRC1 32 Increases the distance between a remote controller and an indoor unit, or between indoor units in a control group.
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MULTI F MULTI F MAX CONTROLS AND OPTIONS OVERVIEW Table 7: Summary Data—Central Controllers (Connect to the Outdoor Unit Through the PI-485 Board (accessory, sold separately). No. of Binary Devices Systems Devices Comm. per per Signals Power / Central Controller Name Model No. per Comm. Description Comm.
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MULTI F MULTI F MAX CONTROLS AND OPTIONS OVERVIEW Table 9: Indoor Units—Functions, Controls and Options. Airflow Filter Operation Controllers Multi F and Multi F MAX Indoor Unit Engineering Manual Indoor Unit Type Air supply outlets Airflow direction (left/right) Airflow direction (up/down) Auto swing (left/right) Auto swing (up/down) Airflow steps (fan/cool/heat) Chaos wind (random fan speed) Jet-cool Swirl wind Washable anti-fungal1 Plasma2 3M HAF2 Ventilation Drain pump E.S.P.
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MULTI F MULTI F MAX CONTROLS AND OPTIONS OVERVIEW Table 10: Multi F MAX Outdoor Unit Accessories Overview. Multi F MAX Accessory Name Model No. Two-Port Branch Distribution Unit PMBD3620 Distributes refrigerant from Multi F MAX outdoor unit from one (1) to two (2) indoor units (maximum 24,000 Btu/h for each port). Three-Port Branch Distribution Unit PMBD3630 Distributes refrigerant from Multi F MAX outdoor unit from one (1) to three (3) indoor units (maximum 24,000 Btu/h for each port).
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Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI F MULTI F MAX 14 | INTRODUCTION 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.
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ART COOL MIRROR INDOOR UNIT DATA ™ “Mechanical Specifications” on page 16 “General Data / Specifications” on page 17 “Dimensions” on page 18 “Cooling Capacity Table” on page 20 “Heating Capacity Table” on page 22 “Acoustic Data” on page 23 “Air Velocity and Temperature Distribution” on page 24 “Refrigerant Flow Diagram” on page 26 “Wiring Diagram” on page 27 “Factory Supplied Parts and Materials” on page 29 “Installation and Best Layout Practices” on page 30
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Mechanical Specifications and Features Figure 1: Multi F Art Cool Mirror Wall-Mounted Indoor Unit. ART COOL Mirror Wall-Mounted Indoor Units General Multi F and Multi F MAX Indoor Unit Engineering Manual All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. ART COOL Mirror Wall-Mounted indoor units have a sound rating no higher than 39 dB(A) as tested per KSA0701 ISO Standard 3745.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS General Data / Specifications Table 12: Multi F Art Cool Mirror Indoor Unit General Data. Model Name Nominal Cooling Capacity (Btu/h) 1 Nominal Heating Capacity (Btu/h) 1 LMAN097HVT LMAN127HVT LMAN187HVT 9,000 12,000 18,000 10,400 13,800 20,800 57-77 57-77 57-77 59-81 59-81 59-81 Cross Flow Cross Flow Cross Flow 14.4 x 1 14.4 x 1 76.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Dimensions Figure 2: LMAN097HVT and LMAN127HVT Dimensions. Supply Air Vane 18 | ART COOL MIRROR 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.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Dimensions Figure 3: LMAN187HVT Dimensions. Supply Air Vane Supply Air Vane Return Air Inlet Return Air Inlet Supply Air Vane Art Cool Mirror™ 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.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Cooling Capacity Table Table 13: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 68 / 57 TC SHC | ART COOL MIRROR 6.04 6.09 6.13 6.18 6.23 6.28 6.32 6.37 6.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Cooling Capacity Table Table 14: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table (continued). Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 17.65 17.63 17.62 17.60 17.59 17.58 17.56 17.55 17.54 17.52 17.51 17.50 17.08 16.66 16.24 15.82 15.37 14.99 14.62 14.24 13.87 13.65 13.57 12.33 12.43 12.52 12.62 12.71 12.81 12.90 13.00 13.10 13.19 13.29 13.38 13.16 12.93 12.70 12.46 12.33 12.00 11.67 11.27 10.93 10.85 10.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Heating Capacity Table Table 15: Multi F Art Cool Mirror Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) Outdoor Air Temp. °F DB °F WB 61 TC 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 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 -0.4 4.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Acoustic Data Figure 4: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit 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 the equipment is installed.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Air Velocity and Temperature Distribution Figure 6: LMAN097HVT Air Velocity and Temperature Distribution Charts. Cooling Discharge angle : 40° Heating Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 9ft 9ft Multi F and Multi F MAX Indoor Unit Engineering Manual 7ft 7ft 6.6 4.9 4.9 3ft 3.3 1.6 16ft 13ft 10ft 7ft 3ft 3.3 1.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Air Velocity and Temperature Distribution Figure 8: LMAN187HVT Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle : 40° Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 9ft 9ft 7ft 7ft 8.2 1.6 16ft 13ft 10ft 3ft 7ft 3.3 1.6 4.9 3.3 3ft 0ft 0ft 16ft 13ft 10ft 4.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Refrigerant Flow Diagram Figure 9: Art Cool Mirror Indoor Unit Refrigerant Flow Diagram.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Wiring Diagram Figure 10: Multi F Art Cool Mirror LMAN097HVT and LMAN127HVT Indoor Units Wiring Diagram. Art Cool Mirror™ 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.
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ART COOL MIRROR INDOOR UNITS Wiring Diagram Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 11: Multi F Art Cool Mirror LMAN187HVT Indoor Unit Wiring Diagram. 28 | ART COOL MIRROR 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.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Factory Supplied Parts and Materials Factory Supplied Parts Table 19: Parts Table.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Selecting the Best Location Figure 12:Minimum Clearance Requirements. • • • • • • >4 inches Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor. Ensure there is sufficient maintenance space.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Preparing for Installation Figure 16:Preparing for Installation. Prepare the refrigerant piping and drain hose (indoor unit piping) for installation through the wall: press on the top of the tubing clamp and slowly guide the piping / hose down (depending on installation requirements, then to the left or right). Relock the tubing clamp after the piping / hose are released.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 23:Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. Multi F and Multi F MAX Indoor Unit Engineering Manual 3.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Controller Options Art Cool Mirror wall-mounted indoor units include a wireless controller (AKB73635606), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). Multi F and Multi F MAX Indoor Unit Engineering Manual Wireless Handheld Controller Figure 31:AKB73635606 Wireless Controller.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Wired Controller Connections GRN / YLW To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) To Wired Controller To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) Wired controllers include a sensor to detect room temperature.
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MULTI F MULTI F MAX ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Hanging the Wired Controller Multi F and Multi F MAX Indoor Unit Engineering Manual 1. The controller wiring / cable can be installed in one of three directions: top, back, or on the right side. If top or right side installation is desired, remove cable guide grooves on the controller, and then position wiring / cable on applicable side. Figure 35:Removing the Cable Guide Grooves.
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ART COOL GALLERY INDOOR UNIT DATA ™ “Mechanical Specifications” on page 38 “General Data / Specifications” on page 39 “Dimensions” on page 40 “Cooling Capacity Table” on page 41 “Heating Capacity Table” on page 42 “Acoustic Data” on page 43 “Air Velocity and Temperature Distribution” on page 44 “Refrigerant Flow Diagram” on page 45 “Wiring Diagram” on page 46 “Factory Supplied Parts and Materials” on page 47 “Installation and Best Layout Practices” on page 48
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Mechanical Specifications and Features ART COOL Gallery Indoor Units General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Art Cool Gallery indoor units have a sound rating no higher than 42 dB(A) as tested per KSA0701 ISO Standard 3745.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS General Data / Specifications Table 21: Multi F Art Cool Gallery Indoor Unit General Data. Model Name Nominal Cooling Capacity (Btu/h) 1 Nominal Heating Capacity (Btu/h) 1 LMAN097HVP LMAN127HVP 9,000 11,200 10,400 13,300 57-77 57-77 59-81 59-81 Operating Range Cooling (°F WB) Heating (°F DB) Fan Type Turbo Turbo Motor Output (W) x Qty.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Dimensions Figure 41: LMAN097HVP and LMAN127HVP Dimensions. Supply Air Multi F and Multi F MAX Indoor Unit Engineering Manual Supply Air Vane Supply Air Supply Air Vane Supply Air Supply Air Vane Return Air Inlet Discharge Air Grille 40 | ART COOL GALLERY™ 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.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Cooling Capacity Table Table 22: Multi F Art Cool Gallery Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMAN097HVP 9,000 8.82 8.82 8.81 8.80 8.80 8.79 8.78 8.78 8.77 8.76 8.76 8.75 8.54 8.33 8.12 7.91 7.68 7.50 7.31 7.12 6.94 6.82 6.79 10.98 10.97 10.96 10.95 10.95 10.94 10.93 10.92 10.91 10.90 10.90 10.89 10.63 10.36 10.10 9.84 9.56 9.33 9.10 8.86 8.63 8.49 8.44 5.68 5.72 5.77 5.81 5.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Heating Capacity Table Table 23: Multi F Art Cool Gallery Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMAN097HVP 9,000 LMAN127HVP 12,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 5.35 5.28 5.23 5.20 5.12 4.90 5 4.5 6.03 5.95 5.90 5.88 5.80 5.58 10 9 6.71 6.63 6.58 6.56 6.48 6.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Acoustic Data Figure 42: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit 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 the equipment is installed.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Air Velocity and Temperature Distribution Figure 44: LMAN097HVP Air Velocity and Temperature Distribution Charts. Cooling Discharge angle: 40° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] Multi F and Multi F MAX Indoor Unit Engineering Manual Heating 9f t 9f t 7f t 7f t 6.6 6.6 16ft 13ft 10ft 4.9 3.3 1.6 7 ft 3f t 3f t 4.6 3f t 0f t 0f t 3.3 1.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Refrigerant Flow Diagram Figure 46: Art Cool Gallery Indoor Unit Refrigerant Flow Diagram.
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ART COOL GALLERY INDOOR UNITS Wiring Diagram Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 47: Multi F Art Cool Gallery Indoor Units Wiring Diagram. 46 | ART COOL GALLERY™ 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.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Factory Supplied Parts and Materials Factory Supplied Parts Table 27: Parts Table.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Selecting the Best Location Figure 48:Minimum Clearance Requirements. Multi F and Multi F MAX Indoor Unit Engineering Manual Do’s • • • • • • Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Preparing the Indoor Unit for Installation Removing the Front Panel Figure 50:Preparing for Installation. 1A 1B 2A 2B 1. First pull the top of the front panel up (1A) and then out (1B). 2. Remove the two (2) screws at the bottom (2A), then lift off the front panel (2B). 3. To completely detach the front panel, disconnect the panel connector found at the top of the indoor unit (3).
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Preparing the Refrigerant and Drain Piping Connections Figure 53:Preparing the Refrigerant / Drain Connections. 1. Depending on the installation requirements, route the indoor unit refrigerant piping and the drain hose to the left, right (see guidelines below), or rear of the frame. 1 Multi F and Multi F MAX Indoor Unit Engineering Manual 2.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 56:Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. 3. Attach the drain tube piping to the indoor unit drain hose as shown below. Figure 57:Extending the Drain Hose.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Controller Options Art Cool Gallery wall-mounted indoor units include a handheld controller (AKB73635607), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). Wireless Handheld Controller Figure 63:AKB73635607 Wireless Controller. Table 28: AKB73635607 Wireless Controller Functions.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Wired Controller Connections Figure 64:Wired Controller Connection on the Indoor Unit Terminal Block. Indoor Unit Terminal Block CN-REMO 3 RD BL 1(L1 ) 2(L2) BR GRN / YLW Multi F and Multi F MAX Indoor Unit Engineering Manual GND To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) Figure 65:Proper Location for the Wired Controller.
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MULTI F MULTI F MAX ART COOL GALLERY INDOOR UNITS Installation and Best Layout Practices Assigning the Thermistor for Temperature Detection Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice of sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller.
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Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI F MULTI F MAX 56 | ART COOL GALLERY™ 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.
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STANDARD WALL-MOUNTED INDOOR UNIT DATA “Mechanical Specifications” on page 58 “General Data / Specifications” on page 59 “Dimensions” on page 60 “Cooling Capacity Table” on page 64 “Heating Capacity Table” on page 67 “Acoustic Data” on page 69 “Air Velocity and Temperature Distribution” on page 71 “Refrigerant Flow Diagram” on page 74 “Wiring Diagram” on page 75 “Factory Supplied Parts and Materials” on page 79 “Installation and Best Layout Practices” on page 80
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STANDARD WALL-MOUNTED INDOOR UNITS Mechanical Specifications and Features Standard Wall-Mounted Indoor Units MULTI F MULTI F MAX Figure 70: Multi F Standard Wall-Mounted Indoor Unit. General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Standard WallMounted units have a sound rating no higher than 43 dB(A) as tested per KSA0701 ISO Standard 3745.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS General Data / Specifications Table 29: Multi F Standard Wall-Mounted Indoor Unit General Data. Model Name Nominal Cooling Capacity (Btu/h) 1 Nominal Heating Capacity (Btu/h) 1 LMN077HVT LSN090HSV4 LSN120HSV4 LMN157HVT LSN180HSV4 LMN247HVT 7,000 9,000 12,000 14,300 18,000 24,000 8,100 10,400 13,800 16,500 20,800 27,000 Operating Range Cooling (°F WB) Heating (°F DB) 57-77 59-81 Fan Type Cross Flow Motor Output (W) x Qty.
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STANDARD WALL-MOUNTED INDOOR UNITS Dimensions MULTI F MULTI F MAX Figure 71: LMN077HVT, and LMN157HVT Dimensions. Return Air Inlet 60 | STD. WALL-MOUNTED 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.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Dimensions Figure 72: LMN247HVT Dimensions. Supply Air Vane Supply Air Vane STD. WALL-MOUNTED Standard Wall-Mounted Return Air Inlet Supply Air Vane 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.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Dimensions Figure 73: LSN090HSV4, and LSN120HSV4 Dimensions. 2-3/8 2 [Unit : inch] Multi F and Multi F MAX Indoor Unit Engineering Manual 1-3/4 2-3/16 Left rear piping 1 Ø2-9/16 Unit Outline 5-3/16 6-7/8 17-3/8 34-7/8 Place a level on raised tab 5 4 3 17-3/8 Ø2-9/16 6-5/16 3-6/8 8-1/2 11-1/4 7/8 2 2-5/16 Right rear piping 8-1/4 Return Air Grille 1-3/4 62 | STD.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Dimensions Figure 74: LSN180HSV4 Dimensions.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Cooling Capacity Table Table 30: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Cooling Capacity Table Table 31: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table (continued). Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 11.76 11.75 11.75 11.74 11.73 11.72 11.71 11.70 11.69 11.68 11.67 11.66 11.38 11.10 10.83 10.55 10.25 10.00 9.75 9.50 9.25 9.10 9.05 14.02 14.01 14.00 13.99 13.98 13.96 13.95 13.94 13.93 13.92 13.91 13.90 13.57 13.23 12.90 12.57 12.21 11.91 11.61 11.32 11.02 10.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Cooling Capacity Table Table 32: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table (continued). Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LSN180HSV4 18,000 LMN247HVT 24,000 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 68 / 57 TC SHC 17.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Heating Capacity Table Table 33: Multi F Standard Wall-Mounted Indoor Units Heating Capacity Table. Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMN077HVT 7,000 LSN120HSV4 12,000 °F WB 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 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 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 -0.4 4.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Heating Capacity Table Table 34: Multi F Standard Wall-Mounted Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMN157HVT 14,300 LSN180HSV4 18,000 LMN247HVT 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 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -0.4 4.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Acoustic Data Figure 75: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit 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 the equipment is installed.
PAGE 70
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Acoustic Data Figure 77:LMN157HVT, LSN180HSV4, and LMN247HVT Sound Pressure Level Diagrams.
PAGE 71
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Air Velocity and Temperature Distribution Figure 78:LMN077HVT Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: 40° Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 9f t 9f t 7f t 7f t 1.6 4. 9 3.3 1. 6 16ft 13ft 10f t 7 ft 4.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Air Velocity and Temperature Distribution Figure 80:LSN120HSV4 Air Velocity and Temperature Distribution Charts. Cooling Discharge angle:45° Heating Discharge angle:50° Air velocity [ft/s] 8.9ft Air velocity [ft/s] 8.9ft 6.6ft Multi F and Multi F MAX Indoor Unit Engineering Manual 6.6ft 4.9 4.9 4.1 2.5 1.6 16.4ft 13.1ft 9.8ft 6.6ft 4.1 4.0ft 4.0ft 3.3 3.3 3.3ft 0ft Temperature [˚F] 0ft 8.9ft 2.5 1.6 16.4ft 13.1ft 9.8ft 6.
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MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Air Velocity and Temperature Distribution Figure 82:LSN180HSV4 Air Velocity and Temperature Distribution Charts. Cooling Discharge angle:45° Air velocity [ft/s] Air velocity [ft/s] 4.9 23ft 16.4ft 19.7ft 13.1ft 3.3 2.5 1.6 26.2ft Heating Discharge angle:50° 9.8ft 6.6ft 8.9ft 8.9ft 6.6ft 6.6ft 4.9 4.0ft 4.1 3.3ft 0ft 0ft Temperature [˚F] 26.2ft 23ft 19.7ft 16.4ft 13.1ft 3.3 2.5 9.8ft 6.6ft 3.
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STANDARD WALL-MOUNTED INDOOR UNITS Refrigerant Flow Diagram MULTI F MULTI F MAX Figure 84:Multi F Standard Wall-Mounted Indoor Unit Refrigerant Flow Diagram.
PAGE 75
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Wiring Diagram Figure 85:Multi F Standard Wall-Mounted LMN077HVT and LMN157HVT Indoor Units Wiring Diagram. Standard Wall-Mounted 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. STD.
PAGE 76
STANDARD WALL-MOUNTED INDOOR UNITS Wiring Diagram Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 86: Multi F Standard Wall-Mounted LMN247HVT Indoor Unit Wiring Diagram. 76 | STD. WALL-MOUNTED 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 77
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Wiring Diagram Figure 87:Multi F Standard Wall-Mounted LSN090HSV4 and LSN120HSV4 Indoor Units Wiring Diagram. Standard Wall-Mounted 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. STD.
PAGE 78
STANDARD WALL-MOUNTED INDOOR UNITS Wiring Diagram Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 88: Multi F Standard Wall-Mounted LSN180HSV4 Indoor Unit Wiring Diagram. 78 | STD. WALL-MOUNTED 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 79
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Factory Supplied Parts and Materials Factory Supplied Parts Table 38: Parts Table.
PAGE 80
STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Selecting the Best Location Figure 89:Minimum Clearance Requirements. >4 inches Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor. Ensure there is sufficient maintenance space.
PAGE 81
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Preparing for Installation Figure 93:Preparing for Installation. Prepare the refrigerant piping and drain hose (indoor unit piping) for installation through the wall: press on the top of the tubing clamp and slowly guide the piping / hose down (depending on installation requirements, then to the left or right). Relock the tubing clamp after the piping / hose are released.
PAGE 82
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 100:Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. Multi F and Multi F MAX Indoor Unit Engineering Manual 3.
PAGE 83
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
PAGE 84
STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices MULTI F MULTI F MAX Controller Options Standard wall-mounted indoor units include a wireless controller (AKB73635606), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). Multi F and Multi F MAX Indoor Unit Engineering Manual Wireless Controller Figure 110: AKB73635606 Wireless Controller.
PAGE 85
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Table 40: AKB73835312 Wireless Controller Functions. Control panel Wireless Controller Display screen Description Fan button : Air come out from the indoor unit below to the room without air temperature change. Figure 111: AKB73835312 Wireless Controller. Sleep mode auto button*: Sets sleep mode auto operation.
PAGE 86
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Wired Controller Connections Indoor Unit Terminal Block CN-REMO 3(C) To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) To Wired Controller 1(L1 ) 2(L2) Wired controllers include a sensor to detect room temperature.
PAGE 87
MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNITS Installation and Best Layout Practices Hanging the Wired Controller 1. The controller wiring / cable can be installed in one of three directions: top, back, or on the right side. If top or right side installation is desired, remove cable guide grooves on the controller, and then position wiring / cable on applicable side. Figure 118:Removing the Cable Guide Grooves. Top Top Back Right Side Right Side 2.
PAGE 88
Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI F MULTI F MAX 88 | STD. WALL-MOUNTED 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 89
CEILING-CONCEALED DUCT (LOW STATIC) INDOOR UNIT DATA “Mechanical Specifications” on page 90 “General Data / Specifications” on page 91 “Dimensions” on page 92 “Cooling Capacity Table” on page 93 “Heating Capacity Table” on page 95 “External Static Pressure” on page 96 “Acoustic Data” on page 97 “Refrigerant Flow Diagram” on page 98 “Wiring Diagram” on page 100 “Factory Supplied Parts and Materials” on page 101 “Installation and Best Layout Practices” on page 102
PAGE 90
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Mechanical Specifications and Features Ceiling-Concealed Duct (Low Static) Indoor Unit Figure 122: Ceiling-Concealed Duct (Low Static) Indoor Unit. Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor.
PAGE 91
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS General Data / Specifications Table 41: Multi F Ceiling-Concealed Low-Static Ducted Indoor Unit General Data.
PAGE 92
8-21/32 25/32 D C B 5 6 5-5/16 1-11/32 L1 : 2-15/16 L2 : 3-1/16 Gravity point B 28-27/32 25-31/32 (unit: inch) A 27-9/16 D 30-15/32 C LMDN096HV Descripition (unit : inch ) 36-23/32 33-27/32 Name 35-7/16 Number Liquid pipe connection 25-31/32 1 Gas pipe connection LMDN126HV LMDN186HV 2 Drain pipe connection Power supply connection Air intake Air outlet 3 4 5 6 Note 1. Unit should be installed in compliance with the installation manual in the product box. 2.
PAGE 93
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Cooling Capacity Table Table 42: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMDN126HV 12,000 8.82 8.82 8.81 8.80 8.80 8.79 8.78 8.78 8.77 8.76 8.76 8.75 8.54 8.33 8.12 7.91 7.68 7.50 7.31 7.12 6.94 6.82 6.79 11.76 11.75 11.75 11.74 11.73 11.72 11.71 11.70 11.69 11.68 11.67 11.66 11.38 11.10 10.83 10.55 10.25 10.00 9.75 9.50 9.25 9.10 9.
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MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Cooling Capacity Table Table 43: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table (continued). Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 68 / 57 TC SHC | DUCT (LOW STATIC) 13.09 13.20 13.30 13.40 13.50 13.60 13.71 13.81 13.91 14.01 14.11 14.21 13.98 13.
PAGE 95
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Heating Capacity Table Table 44: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Heating Capacity Table. Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMDN096HV 9,000 LMDN186HV 18,000 °F DB °F WB 61 TC 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 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 -0.4 4.
PAGE 96
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS External Static Pressure Table 45: Multi F Ceiling-Concealed Duct (Low Static) External Static Pressure Setting Values Table. Static Pressure (in. wg) Model No. / Nominal Capacity of Indoor Unit (Btu/h) Multi F and Multi F MAX Indoor Unit Engineering Manual LMDN096HV 9,000 LMDN126HV 12,000 LMDN186HV 18,000 0.0 0.04 0.08 Airflow Rate / CFM 0.12 0.16 0.
PAGE 97
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Acoustic Data Figure 124: Sound Pressure Level Measurement Location. • 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 the equipment is installed. • Sound power levels are measured in dB(A)±3. • Tested in anechoic chamber per ISO Standard 3745. 4.9 ft.
PAGE 98
DUCT (LOW STATIC) INDOOR UNITS Refrigerant Flow Diagrams MULTI F MULTI F MAX Figure 126: LMDN096HV Refrigerant Flow Diagram. Multi F and Multi F MAX Indoor Unit Engineering Manual : Cooling : Heating Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Sirocco Fan M Indoor Unit Indoor Air Temperature Thermistor Table 47: Multi F Ceiling-Concealed Duct (Low Static) LMDN096HV Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No.
PAGE 99
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Refrigerant Flow Diagrams Figure 127:LMDN126HV and LMDN186HV Refrigerant Flow Diagram. : Cooling : Heating Evaporator Outlet Temperature Thermistor M M Ceiling-Concealed Duct (Low Static) Evaporator Inlet Temperature Thermistor Sirocco Fan Indoor Unit Indoor Air Temperature Thermistor Table 49: Multi F Ceiling-Concealed Duct (Low Static) LMDN126HV and LMDN186HV Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No.
PAGE 100
DUCT (LOW STATIC) INDOOR UNITS Wiring Diagram MULTI F MULTI F MAX Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 128:Multi F Ceiling-Concealed Duct (Low Static) LMDN096HV, LMDN126HV, and LMDN186HV Indoor Units Wiring Diagram. 100 | DUCT (LOW STATIC) 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 101
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Factory Supplied Parts and Materials Factory Supplied Parts Table 51: Parts Table.
PAGE 102
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Selecting the Best Location Figure 129:General Installation Guidelines. Do’s Multi F and Multi F MAX Indoor Unit Engineering Manual • • • • • • Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient strength to bear the load of the indoor unit.
PAGE 103
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Duct (Low Static) Indoor Units can be installed in two ways: Figure 133: Indoor Unit Bolt Locations. E Figure 131:Air inlet from the back of the indoor Figure 132:Air inlet from the bottom of the indoor unit. unit. Air Filter G Back Panel Air Filter H Drainage hole Table 53:Indoor Unit Bolt Location Dimensions.
PAGE 104
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Figure 137:Drain Connection. Multi F and Multi F MAX Indoor Unit Engineering Manual Installing the Drain System • 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. • Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping.
PAGE 105
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Insulating the Refrigerant and Drain Piping Refrigerant Piping Insulation Field-installed vapor and liquid refrigerant piping lines must be properly and completely covered in insulation (up to the indoor unit piping connections). Any exposed piping may generate condensate or will cause burns if touched. Insulation for this field-installed refrigerant piping must have a minimum heat resistance of 248°F.
PAGE 106
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
PAGE 107
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Controller Options Wired Controller Figure 145:AKB729558161 Wired Controller. Ceiling-concealed duct (low static) indoor units include an LG-supplied wired controller (AKB72955816)1, but other optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). The wireless handheld controller (Model No.
PAGE 108
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Figure 148:Removing the Cable Guide Grooves. Hanging the Wired Controller Multi F and Multi F MAX Indoor Unit Engineering Manual 1. The controller wiring / cable can be installed in one of three directions: top, back, or on the right side. If top or right side installation is desired, remove cable guide grooves on the controller, and then position wiring / cable on applicable side.
PAGE 109
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices External Static Pressure Control To provide a required air flow rate that accounts for the external static pressure change, follow the steps below. Figure 153:Controller External Static Pressure Setting Display. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds.
PAGE 110
MULTI F MULTI F MAX DUCT (LOW STATIC) INDOOR UNITS Installation and Best Layout Practices Assigning Air Flow To assign an air flow for each fan speed, follow the steps below. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds. Choose setting code value “03” by pressing the mode selection button. Figure 154:Controller External Static Pressure Setting Display.
PAGE 111
CEILING-CONCEALED DUCT (HIGH STATIC) INDOOR UNIT DATA “Mechanical Specifications” on page 112 “General Data / Specifications” on page 113 “Dimensions” on page 114 “Cooling Capacity Table” on page 115 “Heating Capacity Table” on page 116 “External Static Pressure” on page 117 “Acoustic Data” on page 117 “Refrigerant Flow Diagrams” on page 118 “Wiring Diagram” on page 119 “Factory Supplied Parts and Materials” on page 120 “Installation and Best Layout Practices” on page 121
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MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Mechanical Specifications and Features Ceiling-Concealed Duct (High Static) Indoor Unit Figure 155: Ceiling-Concealed Duct (High Static) Indoor Unit. Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor.
PAGE 113
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS General Data / Specifications Table 55: Multi F Ceiling-Concealed High-Static Ducted Indoor Unit General Data. Model Name LMHN240HV LMHN360HV 24,000 36,000 27,000 40,000 57-77 57-77 59-81 59-81 Type Sirocco Sirocco Motor Output (W) x Qty. Motor/Drive Factory Set Airflow Rate CFM (H/M/L) Factory Set External Static Pressure (in. wg) Maximum External Static Pressure (in.
PAGE 114
DUCT (HIGH STATIC) INDOOR UNITS Dimensions Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 156: LMHN240HV and LMHN360HV Dimensions. 114 | DUCT (HIGH STATIC) 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 115
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Cooling Capacity Table Table 56:Multi F Ceiling-Concealed Duct (High Static) Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMHN360HV 36,000 23.53 23.51 23.49 23.47 23.46 23.44 23.42 23.40 23.38 23.37 23.35 23.33 22.77 22.21 21.65 21.09 20.49 19.99 19.49 18.99 18.49 18.19 18.10 35.29 35.26 35.24 35.21 35.18 35.16 35.13 35.10 35.08 35.05 35.02 34.99 34.15 33.31 32.48 31.64 30.74 29.
PAGE 116
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Heating Capacity Table Table 57:Multi F Ceiling-Concealed Duct (High Static) Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMHN240HV 24,000 LMHN360HV 36,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 13.89 13.70 13.57 13.50 13.30 12.72 5 4.5 15.65 15.46 15.33 15.26 15.07 14.
PAGE 117
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS External Static Pressure / Acoustic Data Table 58:Multi F Ceiling-Concealed Duct (High Static) External Static Pressure Setting Values Table. Static Pressure (in. wg) 0.1 0.16 0.23 0.31 Model No. / Nominal Capacity Airflow Rate / CFM of Indoor Unit (Btu/h) High Mid Low High Mid Low LMHN240HV 24,000 LMHN360HV 36,000 688 618 530 1,130 953 706 0.39 0.47 0.55 0.62 0.70 0.
PAGE 118
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Refrigerant Flow Diagrams Figure 159: LMHN240HV and LMHN360HV Refrigerant Flow Diagram.
PAGE 119
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Wiring Diagrams Figure 160: Multi F Ceiling-Concealed Duct (High Static) LMHN240HV Indoor Units Wiring Diagram. Ceiling-Concealed Duct (High Static) Figure 161: Multi F Ceiling-Concealed Duct (High Static) LMHN360HV Indoor Units Wiring Diagram. 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.
PAGE 120
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Factory Supplied Parts and Materials / Installation Factory Supplied Parts Multi F and Multi F MAX Indoor Unit Engineering Manual Table 62: Parts Table.
PAGE 121
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices If the unit is installed near a body of water, certain components are at risk of being corroded. Appropriate anti-corrosion methods should be taken for the unit and all components. Installing in an Area Exposed to Unconditioned Air In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an unheated garage or storeroom).
PAGE 122
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices Preparing the Installation Area and Hanging the Indoor Unit Frame 1. Select and mark the area for the suspension or console bolts (use embedded inserts or anchor bolts in new buildings, and hole-inanchors in older buildings). 3. Add the set-anchor and the plate washer to the bolts (bolts should be at least 13/32 inches in diameter), and then insert the bolts into the installation area.
PAGE 123
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices Checking the Drain Pump Figure 169:Checking the drain pump. The unit uses a drain pump to remove condensate. The pump must be tested before the system operates. • Connect (field supplied) flexible drain hose to the field-installed drain piping; leave it as is until the test is complete. • Pour water into the flexible drain hose and check for leaks.
PAGE 124
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications. It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
PAGE 125
MULTI F MULTI F MAX Terminal Block Control Box DUCT (HIGH STATIC) INDOOR UNITSA Installation and Best Layout Practices 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.
PAGE 126
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices Wired Controller Placement Multi F and Multi F MAX Indoor Unit Engineering Manual Wired controllers include a sensor to detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from direct sunlight, high humidity, and where it could be directly exposed to cold air.
PAGE 127
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices External Static Pressure Control To provide a required air flow rate that accounts for the external static pressure change, follow the steps below. Figure 183:Controller External Static Pressure Setting Display. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds.
PAGE 128
MULTI F MULTI F MAX DUCT (HIGH STATIC) INDOOR UNITS Installation and Best Layout Practices Assigning Air Flow To assign an air flow for each fan speed, follow the steps below. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds. Choose setting code value “03” by pressing the mode selection button. Figure 184:Controller External Static Pressure Setting Display.
PAGE 129
FOUR-WAY CEILING-CASSETTE INDOOR UNIT DATA “Mechanical Specifications” on page 130 “General Data / Specifications” on page 131 “Dimensions” on page 132 “Cooling Capacity Table” on page 134 “Heating Capacity Table” on page 136 “Acoustic Data” on page 138 “Air Velocity and Temperature Distribution” on page 140 “Refrigerant Flow Diagram” on page 142 “Wiring Diagram” on page 143 “Factory Supplied Parts and Materials” on page 144 “Installation and Best Layout Practices” on page 145
PAGE 130
FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MULTI F MAX Mechanical Specifications and Features Four-Way Ceiling-Cassette Indoor Units General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Four-way ceilingcassette units have a sound rating no higher than 38 dB(A) as tested per KSA0701 ISO Standard 3745.
PAGE 131
MULTI F FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MAX General Data / Specifications Table 71:Multi F Four-Way Ceiling-Cassette Indoor Unit General Data. Model Name Nominal Cooling Capacity (Btu/h) 1 Nominal Heating Capacity (Btu/h) 1 LMCN077HV LMCN097HV LMCN125HV LMCN185HV 7,000 9,000 12,000 18,000 8,100 10,400 13,800 20,800 Operating Range Cooling (°F WB) Heating (°F DB) 57-77 59-81 Fan Type Turbo Motor Output (W) x Qty.
PAGE 132
FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MULTI F MAX Dimensions Supply Air Vane Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 186:LMCN077HV, LMCN097HV, and LMCN125HV Dimensions. Supply Air Vane | CEILING-CASSETTE Supply Air Vane Return Air Grille 132 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 133
MULTI F FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MAX Dimensions Figure 187: LMCN185HV Dimensions. Four-Way Ceiling-Cassette Supply Air Vane Supply Air Vane Supply Air Vane Return Air Grille 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 134
FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MULTI F MAX Cooling Capacity Table Table 72:Multi F Four-Way Ceiling-Cassette Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Cooling Capacity Table Table 73:Multi F Four-Way Ceiling-Cassette Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMCN125HV 12,000 11.76 11.75 11.75 11.74 11.73 11.72 11.71 11.70 11.69 11.68 11.67 11.66 11.38 11.10 10.83 10.55 10.25 10.00 9.75 9.50 9.25 9.10 9.05 17.65 17.63 17.62 17.60 17.59 17.58 17.56 17.55 17.54 17.52 17.51 17.50 17.08 16.66 16.24 15.82 15.37 14.99 14.62 14.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Heating Capacity Table Table 74:Multi F Four-Way Ceiling-Cassette Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMCN077HV 7,000 LMCN097HV 9,000 Outdoor Air Temp. °F DB °F WB 61 TC 0 -0.4 4.17 4.11 Indoor Air Temp. °F DB 68 70 TC TC 4.07 4.05 72 TC 75 TC 3.99 3.82 5 4.5 4.70 4.64 4.60 4.58 4.52 4.34 10 9 5.22 5.17 5.13 5.
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MULTI F FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MAX Heating Capacity Table Table 75:Multi F Four-Way Ceiling-Cassette Indoor Units Heating Capacity Table. Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMCN125HV 12,000 °F DB °F WB 61 TC 0 -0.4 7.10 64 TC 7.00 Indoor Air Temp. °F DB 68 70 TC TC 6.93 6.90 72 TC 75 TC 6.80 6.50 5 4.5 8.00 7.90 7.83 7.80 7.70 7.40 10 9 8.90 8.80 8.73 8.70 8.60 8.30 17 15 10.10 10.00 9.93 9.90 9.80 9.48 20 19 10.55 10.45 10.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Acoustic Data Ceiling • Measurement taken 4.9′ away from the 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 the equipment is installed. • Sound power levels are measured in dB(A)±3. • Tested in anechoic chamber per ISO Standard 3745.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Acoustic Data Figure 190: LMCN125HV and LMCN185HV Sound Pressure Level Diagrams.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Air Velocity and Temperature Distribution Figure 191:LMCN077HV Air Velocity and Temperature Distribution Charts. Cooling Discharge angle: 40° Air velocity [ft/s] Air velocity [ft/s] Multi F and Multi F MAX Indoor Unit Engineering Manual 9f t 6.6 6.6 4.9 3.3 4.9 3.3 6.6 7f t 4.9 4.9 5f t 0f t 5 ft 8 ft 7f t 3.3 1.6 1.6 3f t 1.6 9f t 6.6 3.3 1.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Air Velocity and Temperature Distribution Figure 193:LMCN125HV Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: 40° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] 9f t 6. 6 6. 6 4. 6 7f t 1. 6 3f t 1. 6 0f t 5 ft 8 ft 1.6 1.6 0f t 8f t 3f t 3.3 3.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Refrigerant Flow Diagram Figure 195: Multi F Four-Way Ceiling-Cassette Indoor Unit Refrigerant Flow Diagram.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Wiring Diagram Figure 196: Multi F Four-Way Ceiling-Cassette Indoor Unit Wiring Diagram. Four-Way Ceiling-Cassette 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.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Factory Supplied Parts and Materials Factory Supplied Parts Multi F and Multi F MAX Indoor Unit Engineering Manual Table 79: Parts Table.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Installation and Best Layout Practices Selecting the Best Location Figure 197:Indoor Unit Clearance Requirements. ≥19-11/16 inches Installing in a High or Dropped Ceiling High or dropped ceilings, often found in commercial buildings and offices, may cause a wide temperature differentiation. To countermeasure: • Change the indoor unit mode selection to allow for higher ceilings (see table). • Install an air circulator.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Installation and Best Layout Practices Installing Multiple Indoor Units in One Area Ensure there is enough space between indoor units, lighting fixtures, and ventilation fans / systems. Figure 199:Installing Multiple Indoor Units.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Installation and Best Layout Practices For New Ceilings For Existing Ceilings 1. Use anchors when installing the indoor unit in an existing ceiling. 2. Ceiling height is shown on the side of the installation guide (template). Adjust the height of the unit accordingly. Adjust the clearance before hanging the indoor unit. 3. Remove the temporary washer plate and position the indoor unit hanger brackets on the bolts.
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Liquid Piping Connection MULTI F FOUR-WAY CEILING-CASSETTE INDOOR UNITS (Field-Supplied) MULTI F MAX Installation and Best Layout Practices Insulation for Refrigerant Piping Clamp for Insulation (Field-Supplied) Insulation (Field-Supplied) Insulating the Refrigerant and Drain Piping Refrigerant Piping Insulation Multi F and Multi F MAX Indoor Unit Engineering Manual Field-installed vapor and liquid refrigerant piping lines must be properly and completely covered in insulation (up to the indoor unit pip
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Installation and Best Layout Practices Connecting the Power Wiring and Communications Cable Figure 207:Power Wiring and Communications Cable Connection Access. 1. To access the terminal block, open the control box cover. 2. Insert the power wiring / communications cable from the outdoor unit or branch distribution unit (Multi F MAX systems only) through the sides of the indoor unit and control box.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Installation and Best Layout Practices Controller Options Four-way ceiling-concealed indoor units include a wireless handheld controller (AKB73757604)1, but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s introduction section). Wireless Handheld Controller Table 82:AKB737576041 Wireless Handheld Controller Functions.
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MULTI F FOUR-WAY CEILING CASSETTE INDOOR UNITS MULTI F MAX Installation and Best Layout Practices Wired Controller Placement Figure 212:Proper Location for the Wired Controller. Wired controllers include a sensor to detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from direct sunlight, high humidity, and where it could be directly exposed to cold air.
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FOUR-WAY CEILING-CASSETTE INDOOR UNITS MULTI F MULTI F MAX Installation and Best Layout Practices PTVK430 Ventilation Kit Figure 216:PTVK430 Ventilation Kit. Multi F and Multi F MAX Indoor Unit Engineering Manual PTVK430 Ventilation Kit includes a flange for field-supplied ventilation pipe connection. Easily connects at the four-way ceiling-cassette three (3) inch fresh air knockout hole.
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VERTICAL-HORIZONTAL AIR HANDLING INDOOR UNIT DATA “Mechanical Specifications” on page 154 “General Data / Specifications” on page 155 “Dimensions” on page 156 “Cooling Capacity Table” on page 157 “Heating Capacity Table” on page 158 “External Static Pressure” on page 159 “Acoustic Data” on page 160 “Refrigerant Flow Diagram” on page 161 “Wiring Diagram” on page 162 “Factory Supplied Parts and Materials” on page 164 “Installation and Best Layout Practices” on page 165
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VERTICAL-HORIZONTAL INDOOR UNITS Mechanical Specifications and Features Vertical-Horizontal Air Handing Indoor Unit Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Vertical-Horizontal Air Handling units are designed for high-speed air volume against an external static pressure up to 1.00″WG.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS General Data / Specifications Table 83: Multi F Vertical-Horizontal Air Handling Indoor Unit General Data. Model Name Nominal Cooling Capacity (Btu/h) LMVN240HV LMVN360HV 24,000 36,000 27,000 40,000 57-77 57-77 59-81 59-81 Sircocco Sircocco 96 x 1 182 x 1 Brushless Digitally Controlled / Direct Brushless Digitally Controlled / Direct 710 / 640 / 480 990 / 880 / 800 1.00 1.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Dimensions Figure 220: LMVN240HV and LMVN360HV Dimensions. 18 17 D 12-1/8 W 1-9/16 H 1-15/16 1-15/16 Multi F and Multi F MAX Indoor Unit Engineering Manual 21-1/4 2-1/16 2-1/8 1-5/8 1-9/16 48-21/32 49-5/16 2-9/16 1-1/2 14-5/16 4-11/16 1-9/16 9-15/16 13 LMVN240HV LMVN360HV Model 18 W Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Cooling Capacity Table Table 84: Multi F Vertical-Horizontal Air Handling Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMVN360HV 36,000 23.53 23.51 23.49 23.47 23.46 23.44 23.42 23.40 23.38 23.37 23.35 23.33 22.77 22.21 21.65 21.09 20.49 19.99 19.49 18.99 18.49 18.19 18.10 35.29 35.26 35.24 35.21 35.18 35.16 35.13 35.10 35.08 35.05 35.02 34.99 34.15 33.31 32.48 31.64 30.74 29.99 29.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Heating Capacity Table Table 85: Multi F Vertical-Horizontal Air Handling Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMVN240HV 24,000 LMVN360HV 36,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 13.89 13.70 13.57 13.50 13.30 12.72 5 4.5 15.65 15.46 15.33 15.26 15.07 14.48 10 9 17.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS External Static Pressure Table 86: Multi F Vertical-Horizontal Air Handling Unit External Static Pressure Setting Values Table. Static Pressure (in. wg) 0.1 0.2 0.3 0.4 Model No. / Nominal Capacity Airflow Rate / CFM of Indoor Unit (Btu/h) LMVN240HV 24,000 LMVN360HV 36,000 High Mid Low High Mid Low 0.5 0.6 0.7 0.8 0.9 1.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Acoustic Data Measurement taken 3.3′ away from the 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 the equipment is installed. • Sound power levels are measured in dB(A)±3. • Tested in anechoic chamber per ISO Standard 3745.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Refrigerant Flow Diagram Figure 223: Multi F Vertical-Horizontal Air Handling Indoor Unit Refrigerant Flow Diagram.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Wiring Diagram Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 224: Multi F Vertical-Horizontal Air-Handling Indoor Unit Wiring Diagram. : Factory Wiring : Field Wiring : OPTION Table 93: Wiring Diagram Connections.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Wiring Diagram Table 94: DIP Switch Settings. Dip Switch Settings SW3 GROUP OFF ON Description Master Slave Group control setting using wired remote controller. Dry contact mode setting. 1. Variable: Auto/manual mode can be chosen using the wide wired remote controller or wireless remote controller (factory setting is the manual mode). 2. Auto: For dry contact, it is always auto mode.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Factory Supplied Parts and Materials Factory Supplied Materials • Owner’s Manual • Installation Manual • Simple Controller with Mode Selection (AKB72955816)1 Simple Mode Controllers for the vertical-horizontal air handling indoor units are also referenced by Model No. PQRCVCL0QW.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Figure 226:General and Duct Connection Dimensions. Figure 225:Clearance Requirements.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Vertical-Horizontal Air Handling Units can be installed in a choice of vertical (upflow) or horizontal (left side) configurations. Vertical (Upflow) Installation Figure 228:Vertical Installation / Attaching the Bottom Duct. • Unit must be positioned properly for plenum / duct installation.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Installing the Ducts Figure 230:Securing the Ducts to the Unit. • Use more than ten (10) screws to securely attach the supply ducts to the unit. To prevent air leaks, seal around the duct opening before the duct is secure. • To prevent vibration transmission, install flexible connectors between ducts and the unit.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Drain Piping Specifications • 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. Multi F and Multi F MAX Indoor Unit Engineering Manual • Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping. Figure 233:Close up of Drain Piping Connection.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Controller Options AKB729558161 Wired Controller. • • • • • Operation Display Panel Temperature Control Button Fan Speed Button Operation Display Panel: Displays operation conditions. Temperature Control Button: Sets desired temperature. Fan Speed Button: Sets desired fan speed. On / Off Button: Turns system operation on and off.
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MULTI F MULTI F MAX VERTICAL-HORIZONTAL INDOOR UNITS Installation and Best Layout Practices Wired Controller Placement Wired controllers include a sensor to detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from direct sunlight, high humidity, and where it could be directly exposed to cold air.
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Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI F MULTI F MAX 172 | VERTICAL-HORIZONTAL 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.
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APPLICATION GUIDELINES “Equipment Selection Procedure” on page 174 “Building Ventilation Design Guide” on page 180 “Placement Considerations” on page 185
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Multi F and Multi F MAX Indoor Unit Engineering Manual EQUIPMENT SELECTION PROCEDURE MULTI F MULTI F MAX To choose the multi-zone system that is the most appropriate for the space, as with traditional air-conditioning systems, follow similar protocols outlined in Manual J from the Air Conditioning Contractors of America (ACCA; see www.acca.org). 1. Obtain the design conditions, and calculate the maximum cool and heat loads for the structure. 2.
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MULTI F MULTI F MAX EQUIPMENT SELECTION PROCEDURE Multiplier Examples Example 1 Outdoor Unit: LMU540HV First Indoor Unit: + Second Indoor Unit: + Third Indoor Unit: LMCN125HV LSN090HSV4 LMVN360HV Total Capacity Index = 12 + 9 + 36 x 1.3 = 67.8 < 73 Acceptable Combination Table 97: Allowable Indoor Unit to Outdoor Unit Connections.
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MULTI F MULTI F MAX EQUIPMENT SELECTION PROCEDURE Table 98: Rated Outdoor Unit Capacity. Rated Capacity (Btu/h) Multi F and Multi F MAX Indoor Unit Engineering Manual Connectable Indoor Units Cooling Heating Minimum No. of Connectable Indoor Units Maximum No.
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MULTI F MULTI F MAX EQUIPMENT SELECTION PROCEDURE Using the System Combination Tables Multi F system combination tables illustrate how each indoor unit receives a percentage of total outdoor unit rated capacity.
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MULTI F MULTI F MAX EQUIPMENT SELECTION PROCEDURE Table 100: Multi F MAX Outdoor Unit to Branch Distribution Unit Refrigerant Line Length Derates. Main Piping Length (feet) 16.4 32.8 49.2 65.6 82.0 98.4 114.8 131.2 147.6 164.0 180.4 Cooling Capacity (%) 100.0 98.8 97.3 95.8 94.3 92.8 91.3 89.8 88.3 86.8 85.3 Heating Capacity (%) 100.0 99.6 99.2 98.7 98.3 97.8 97.4 96.9 96.5 96.0 95.
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MULTI F MULTI F MAX EQUIPMENT SELECTION PROCEDURE Altitude Correction Factor The impact of air density must be considered on systems installed at a significant altitude above sea level, therefore, locally accepted altitude correction factors must be applied. Defrost Correction Factor for Heating Operation The outdoor unit heating capacity may need to be adjusted for frost accumulation on air-cooled systems.
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BUILDING VENTILATION DESIGN GUIDE MULTI F MULTI F MAX 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. Outdoor air is required to minimize adverse health effects, and it provides acceptable indoor air quality for building occupants. Indoor units located within the zone typically require less airflow to condition the space.
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MULTI F MULTI F MAX 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.
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BUILDING VENTILATION DESIGN GUIDE MULTI F MULTI F MAX Method 3: Unconditioned Outdoor Air Ducted to Indoor Units Multi F and Multi F MAX Indoor Unit Engineering Manual Untreated outdoor air is channeled through a duct system that is piped to the return air duct on Multi F ducted indoor units or to the frame of Multi F 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.
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MULTI F MULTI F MAX BUILDING VENTILATION DESIGN GUIDE Method 4: Coupled Dedicated Outdoor Air (CDOA) A separate, dedicated outdoor air system delivers air directly to a Multi F 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.
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BUILDING VENTILATION DESIGN GUIDE MULTI F MULTI F MAX Method 5: Decoupled Dedicated Outdoor Air System (DDOAS) LG recommends using the DDOAS method in all installations. Advantages • Does not add additional heating or cooling loads to indoor units. • May be used with the full lineup of Multi F indoor units. • Failure of outdoor unit does not impact operation of indoor unit, the resulting untreated air will be readily noticed by the occupants.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Selecting the Best Location for the Indoor Units Select a location for installing the indoor units that will meet the following conditions: • Within allowable parameters for proper connection to the outdoor unit (or Branch Distribution unit, if a Multi F MAX system). • No obstacles to air circulation around the unit; keep proper distances from ceilings, doorways, floor, walls, etc. • So that condensation drainage can be conveniently routed away.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Rooftop Installations If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop mounting. Multi F and Multi F MAX Indoor Unit Engineering Manual Oceanside Installation Precautions • Avoid installing the outdoor unit where it would be directly exposed to ocean winds.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Outdoor Unit Platform Requirements Figure 253: Outdoor Unit Foundation Requirements. Unit: Inch Unit: Inch Minimum 3-15/16) Minimum 3-15/16 21-1/2 Minimum 14-9/16 21-1/2 LMU18CHV and LMU24CHV Outdoor Units Minimum 14-9/16 LMU36CHV Outdoor Units Table 103: Outdoor Unit Foundation Specifications.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Multi F and Multi F MAX Indoor Unit Engineering Manual Tie-Downs and Lightening Protection Figure 256: Lightening Protection Diagram. Tie-Downs • The strength of the roof must be checked before installing the outdoor units. • If the installation site is prone to high winds or earthquakes, when installing on the wall or roof, securely anchor the mounting base using a field-provided tie-down configuration approved by a local professional engineer.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Clearance Requirements when Different Obstacles are Present (Unit: Inch). Obstacle on the suction side only. m u inim M 11 /16 -13 " Obstacles on the suction side and on both left and right sides. Min imu m1 1-1 3/16 " imu m2 imu 3-1 Min 9/32 6" 13/1 1m1 Application Guidelines Min " Obstacles above and on the air intake side.
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MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS Clearance Requirements when Different Obstacles are Present, continued. (Unit: Inch) Where there obstacles both suction Where there are are obstacles on on both suction discharge sides (discharge side obstacle and and discharge sides (discharge side obstacle is higher outdoor unit). is higher thanthan the the outdoor unit).
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REFRIGERANT PIPING DESIGN & LAYOUT BEST PRACTICES “Design Guideline Summary” on page 192 “Creating a Balanced / Quality Piping System” on page 194 “Manual Layout Procedure” on page 194 “LG Engineered Multi F MAX Y-Branch Kits” on page 195 “Refrigerant Charge” on page 196 “Selecting Field-Supplied Copper Tubing” on page 198 “Refrigerant Piping System Layout” on page 200 “Piping Insulation” on page 208 “Condensate Drain Piping” on page 209 “Cut Sheet” on page 211
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN Design Guideline Summary The following are examples of manual pipe size calculations. Designers are highly encouraged to use LATS for Multi F systems. Device Connection Limitations • The minimum number of connected and operating indoor units to Multi F / Multi F MAX systems is two, taking into consideration of the minimum combination ratio.
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN Design Guideline Summary The following are examples of manual pipe size calculations. Designers are highly encouraged to use LATS for Multi F systems. Multi F MAX System with One Branch Distribution Unit Example: LMU540HV outdoor unit with four (4) indoor units, and one (1) branch distribution unit connected. IDU BDU A B h1 ≤ 98.4 feet h2 ≤ 49.2 feet IDU B IDU B h3 ≤ 32.8 feet Refrigerant Piping Design and Best Practices ODU: Outdoor Unit.
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REFRIGERANT PIPING DESIGN Creating a Balanced System / Manual Layout Procedure MULTI F MULTI F MAX Creating a Balanced / Quality Piping System Multi F and Multi F MAX Indoor Unit Engineering Manual Unlike designing duct-work or chilled and hot water pipe systems where balancing dampers, ball valves, orifices, circuit setters, or other flow control devices can be installed to modify or balance the flow of cooling medium, these cannot be used in a Multi F system.
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN LG Engineered Multi F MAX Y-Branch Kit Multi F MAX Y-Branch Kit PMBL5620 Figure 257:Y-Branch Connections. The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected on one Multi F MAX system. Field-supplied fittings are not permitted. Each Y-Branch kit comes with two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers.
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN Refrigerant Charge Multi F and Multi F MAX Indoor Unit Engineering Manual LG Multi F and Multi F MAX outdoor units ship from the factory with a charge of R410A refrigerant. A trim charge may need to be added to take into account additional piping length. To determine the additional refrigerant that is needed, apply the formulas below, and record the results.
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN Refrigerant Charge Multi F MAX Systems Additional charge (lbs.) = (Total Main Piping Length [A] - Chargeless Pipe Length of Main Pipe [L]) x a + (Installed Length of Branch [B1] – Chargeless Pipe Length [B]) x b + (Installed Length of Branch [B2] – Chargeless Pipe Length [B]) x b + (Installed Length of Branch [B3] – Chargeless Pipe Length [B]) x b ... - CF (Correction Factor) x 3.53 Table 113:Multi F MAX Outdoor Unit Piping Specifications.
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MULTI F MULTI F MAX REFRIGERANT PIPING DESIGN Selecting Field-Supplied Copper Tubing Multi F and Multi F MAX Indoor Unit Engineering Manual Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only type that ships with yellow caps. Approved tubing for use with Multi V products will be marked “R410 RATED” along the length of the tube.
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MULTI F MULTI F MAX INSTALLATION & LAYOUT BEST PRACTICES Selecting Field-Supplied Copper Tubing Table 116: Linear Thermal Expansion of Copper Tubing in Inches. 1 35° 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.48 0.56 0.64 0.72 40° 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.48 0.56 0.64 0.72 45° 50° 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 0.06 0.12 0.18 0.24 0.30 0.36 0.42 0.48 0.54 0.60 0.72 0.84 0.96 1.08 55° 0.06 0.13 0.20 0.26 0.33 0.39 0.46 0.
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INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout MULTI F MULTI F MAX Multi F and Multi F MAX Indoor Unit Engineering Manual Field-Provided Isolation Ball Valves LG recommends installing field-supplied ball valves with Schrader ports at each 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.
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MULTI F MULTI F MAX INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout Inserts and Pipe Supports Figure 266: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. Decide where the inserts should be placed before support installation.
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INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout MULTI F MULTI F MAX Examples of Supports Figure 271:U-Bolt Support with Insulation. Figure 272:O-Ring Support with Insulation. Figure 273:Saddle-Type Support. Bolt Insulation Support at Intervals Between 5 and 6-3/4 Feet Multi F and Multi F MAX Indoor Unit Engineering Manual Bolt 1.5t Plate PVC PVC Do not compress the insulation with the saddle-type support.
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MULTI F MULTI F MAX 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 routed through a properly insulated sleeve that is sufficiently sized to provide free movement of the pipe and does not compress the insulation. Underground refrigerant pipe shall be routed inside a protective sleeve to prevent insulation deterioration.
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INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout MULTI F MULTI F MAX Multi F Outdoor Unit to Indoor Unit Piping Connections Multi F and Multi F MAX Indoor Unit Engineering Manual Avoid Pipe Damage • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Correctly route the piping so it does not make contact with mounting bolts. Allow room for field installation.
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MULTI F MULTI F MAX INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout Multi F MAX Outdoor Unit System Piping Connections Avoid Pipe Damage • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Correctly route the piping so it does not make contact with mounting bolts. Allow room for field installation. • Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame.
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INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout MULTI F MULTI F MAX Multi F System Piping Connections 1. Align the center of the piping sections and tighten the flare nut by hand. 2. Tighten the flare nut with a torque wrench, using the arrows on the wrench as a guide, until a click is heard. 3. Wrap insulation around the connection. Figure 286:Possible Outdoor Unit or Branch Distribution Unit to Indoor Unit Connections. Multi F and Multi F MAX Indoor Unit Engineering Manual 1.
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MULTI F MULTI F MAX INSTALLATION & LAYOUT BEST PRACTICES Refrigerant Piping System Layout Brazing Practices Keep the piping system free of contaminants and debris such copper burrs, slag, or carbon dust during installation. 1. All joints are brazed in the field. Multi F refrigeration system components contain very small capillary tubes, small orifices, electronic expansion valves, oil separators, and heat exchangers that can easily become blocked.
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INSTALLATION & LAYOUT BEST PRACTICES Piping Insulation MULTI F MULTI F MAX Multi F and Multi F MAX Indoor Unit Engineering Manual Refrigerant Piping System Insulation All refrigerant piping including Y-branch 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.
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MULTI F MULTI F MAX INSTALLATION & LAYOUT BEST PRACTICES Condensate Drain Piping Condensate Drain Piping Outdoor Units Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See “Placement Considerations” on page 185 to page 190 for information on outdoor unit placement and condensate drainage.
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INSTALLATION & LAYOUT BEST PRACTICES Condensate Drain Piping MULTI F MULTI F MAX Multi F and Multi F MAX Indoor Unit Engineering Manual Common Indoor Unit Drainage System It is usual work practice to connect individual indoor unit drain pipes to one common indoor unit drainage system. The diameter of the common vertical drain pipe should be as large as necessary. (For systems with <80,000 Btu/h total capacity of all connected indoor units, the standard size for the common vertical drain pipe is 0.
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MULTI F MULTI F MAX CUT SHEET Y-Branch Kit • LG Y-Branch Kit PMBL5620 is required when installing two branch distribution units in parallel on one LG Multi F MAX system. • The kit must be properly installed following instructions in the applicable LG manual. Field-supplied branch fittings are not permitted. • Kit components must be kept free of debris and be dry before installation. • All Y-Branch Kits include a clam shell, peel-and-stick insulation jacket. Table 131:Fitting Properties.
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Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI F MULTI F MAX 212 | DESIGN & PRACTICES 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.
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WIRING CONNECTIONS “General Information” on page 214 “Power Wiring (208-230V) and Communications Cable Details” on page 217 “Indoor Unit Group Control” on page 222
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MULTI F MULTI F MAX WIRING CONNECTIONS Multi F and Multi F MAX Indoor Unit Engineering Manual General Information • Only qualified technicians—in accordance with federal, state, and local codes, and manufacturer product diagrams and requirements— should install the power wiring and communication cables. • Use only copper wiring that is stranded, shielded with the wires separately insulated. • Do not use a multi-conductor cable with more than five (5) wires in one (1) core.
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MULTI F MULTI F MAX WIRING CONNECTIONS General Information Connecting the Power Wiring / Communications Cable Best practice dictates using ring or spade terminals to terminate power wiring at the power terminal block. If ring terminals or spade clips are not available, then: • Do not terminate different gauge wires to the power terminal block. (Slack in the wiring may generate heat.) • When terminating wires of the same thickness, follow the instructions demonstrated in the figures below.
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MULTI F MULTI F MAX WIRING CONNECTIONS General Information Figure 305:Multi F System General Power / Communications System Schematic. Indoor Units Multi F and Multi F MAX Indoor Unit Engineering Manual Power Supply Circuit Breaker Ground Wiring Outdoor Unit Figure 306:Multi F MAX System General Power / Communications System Schematic. Indoor Unit BD Unit Power Supply Circuit Breaker BD Unit Ground Wiring Outdoor Unit • Secure the separate wires in the control box panel using zip ties.
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MULTI F MULTI F MAX WIRING CONNECTIONS Power Wiring (208-230V) and Communications Cable Details • Find the outdoor unit terminal block by unscrewing the control access panel. Figure 307:Example of Power Wiring and Communications Cable Terminations. Control Access Panel • Side panel of the outdoor unit has knockout holes for the conduits. After install is complete, seal up any gaps between the panel and the conduits.
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MULTI F MULTI F MAX WIRING CONNECTIONS Power Wiring (208-230V) and Communications Cable Details Figure 308: Multi F LMU18CHV System Power Wiring and Communications Cable.
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MULTI F MULTI F MAX WIRING CONNECTIONS Power Wiring (208-230V) and Communications Cable Details Figure 309:Multi F LMU24CHV System Power Wiring and Communications Cable.
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MULTI F MULTI F MAX WIRING CONNECTIONS Power Wiring (208-230V) and Communications Cable Details Figure 310:Multi F LMU36CHV System Power Wiring and Communications Cable.
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MULTI F MULTI F MAX WIRING CONNECTIONS Power Wiring (208-230V) and Communications Cable Details Figure 311: Multi F MAX LMU540HV System Power Wiring and Communications Cable.
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MULTI F MULTI F MAX WIRING CONNECTIONS Indoor Unit Group Control Communication Cables Between Multiple Indoor Units Operating as a Group (Group Control) Multi F and Multi F MAX Indoor Unit Engineering Manual 1. If any indoor units were specified to operate in unison, use one (or multiple) three-core Group Control Kit (sold separately) containing extension and Y-splitter cables. One (1) group control cable kit for each indoor unit in the group except for the last indoor unit. 2.
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MULTI F MULTI F MAX ACRONYMS Table 135: Table of Acronyms.
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20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Commercial Air Conditioning Division 11405 Old Roswell Road Alpharetta, Georgia 30009 www.lghvac.com LG Electronics Products Support 1-888-865-3026 USA Follow the prompts for HVAC products.