MULTI F MULTI F MAX OUTDOOR UNIT INSTALLATION MANUAL Multi-Zone Heat Pump Systems 1.
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. Do not throw away, destroy, or lose this manual. Please read carefully and store in a safe place for future reference. Content familiarity is required for proper installation.
MULTI F WITH MULTI F MAX TABLE OF CONTENTS Safety Instructions ...................................................................................................................................................................................................... 4-7 Nomenclature.................................................................................................................................................................................................................. 8 General Data ......
MULTI F MULTI F MAX SAFETY INSTRUCTIONS The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols described below. TABLE OF SYMBOLS DANGER This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
MULTI F MULTI F MAX SAFETY INSTRUCTIONS Installation, continued Properly insulate all cold surfaces to prevent “sweating.” Cold surfaces such as uninsulated piping can generate condensate that could drip, causing a slippery surface that creates a risk of slipping, falling, and personal injury. CAUTION Be very careful when transporting the product. There is a risk of the product falling and causing physical injury.
MULTI F MULTI F MAX SAFETY INSTRUCTIONS Wiring DANGER High voltage electricity is required to operate this system. Adhere to the NEC code and these instructions when wiring. MULTI F / MULTI F MAX Outdoor Unit Installation Manual Improper connections and inadequate grounding can cause accidental injury or death. Always ground the unit following local, state, and NEC codes. 7KHUH LV ULVN RI ¿UH HOHFWULF VKRFN DQG SK\VLFDO LQMXU\ RU GHDWK 7XUQ WKH SRZHU Rႇ DW WKH QHDUHVW GLVFRQQHFW EHIRUH VHUYLFLQJ
MULTI F MULTI F MAX SAFETY INSTRUCTIONS Operation DANGER 'R QRW SURYLGH SRZHU WR RU RSHUDWH WKH XQLW LI LW LV ÀRRGHG or submerged. 7KHUH LV ULVN RI ¿UH HOHFWULF VKRFN SK\VLFDO LQMXU\ RU GHDWK Use a dedicated breaker for this product. 7KHUH LV ULVN RI ¿UH HOHFWULF VKRFN SK\VLFDO LQMXU\ RU GHDWK Do not operate the disconnect switch with wet hands. 7KHUH LV ULVN RI ¿UH HOHFWULF VKRFN SK\VLFDO LQMXU\ RU GHDWK Periodically verify the equipment mounts have not deteriorated.
MULTI F MULTI F MAX NOMENCLATURE Multi-Zone Systems — Indoor Units and Outdoor Units L M DN 12 6 HV BD 36 2 0 MULTI F / MULTI F MAX Outdoor Unit Installation 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 QN: Low-Wall Console Indoor Unit VN: Vertical-Horizontal Air Handling In
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 6SHFL¿FDWLRQV Table 1: 0XOWL ) 2XWGRRU 8QLW 6SHFL¿FDWLRQV 1 Rated capacity applied with non-ducted indoor units, and is rated 0 ft. above sea level with 25 ft. of refrigerant line per indoor unit and a 0 ft. level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95 – 105%.
MULTI F MULTI F MAX GENERAL DATA Multi F Outdoor Unit Electrical Data Table 2: Multi F Outdoor Unit Electrical Data. MULTI F / MULTI F MAX Outdoor Unit Installation Manual Voltage Nominal Unit Model Hertz Voltage Phase Compressor Outdoor Fan Motor Range MCA MOP Compressor Tons No. Quantity Motor RLA (Min. to Max.) kW FLA 1.5 2 2.5 3 LMU18CHV LMU24CHV LMU30CHV LMU36CHV 60 208 - 230 Voltage tolerance is ±10%. Maximum allowable voltage unbalance is 2%. RLA = Rated Load Amps.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 'LPHQVLRQV Figure 1: LMU18CHV Multi F Outdoor Unit External Dimensions. [Unit : mm(inch)] Gravity point Product Data No. Note Part Name 1. Unit should be installed in compliance with the installation manual in the product box. 1 Air discharge grille 2 Gas pipe connection 3 Liquid pipe connection 4 Power & transmission connection 5 Main service valve(Gas) 6 Main service valve(Liquid) 2.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 'LPHQVLRQV Figure 2: LMU24CHV Multi F Outdoor Unit External Dimensions. [Unit : mm(inch)] MULTI F / MULTI F MAX Outdoor Unit Installation Manual Gravity point No. 12 Note Part Name 1. Unit should be installed in compliance with the installation manual in the product box. 1 Air discharge grille 2 Gas pipe connection 3 Liquid pipe connection 4 Power & transmission connection 5 Main service valve(Gas) 6 Main service valve(Liquid) 2.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 'LPHQVLRQV Figure 3: LMU30CHV and LMU36CHV Multi F Outdoor Unit External Dimensions. [Unit : mm(inch)] Gravity point Product Data Note No. Part Name 1 Air discharge grille 2 Gas pipe connection 3 Liquid pipe connection 4 Main service valve(Liquid) 5 Main service valve(Gas) 1. Unit should be installed in compliance with the installation manual in the product box. 2.
MULTI F MULTI F MAX GENERAL DATA MULTI F / MULTI F MAX Outdoor Unit Installation Manual 0XOWL ) 0$; 2XWGRRU 8QLW 6SHFL¿FDWLRQV Table 3: Multi F MAX Outdoor Unit General Data. Model Number Cooling Capacity (Btu/h) (Minimum ~ Rated ~ Maximum)1 Heating Capacity (Btu/h) (Minimum ~ Rated ~ Maximum)1 Operating Range Cooling (°F DB) Heating (°F WB) Compressor Inverter Quantity Oil Type Fan (Side Discharge) Type Motor Output (W) x Qty.
MULTI F MULTI F MAX GENERAL DATA Multi F MAX Outdoor Unit Electrical Data Table 4: Multi F MAX Electrical Data. Condenser Fan Motor(s) Voltage Indoor Nominal Unit Model Hertz Voltage Phase Compressor Compressor Condenser Condenser Fan Range MCA MOP Quantity Tons No. Motor RLA Fan Quantity Fan Motor Motor (Min. to Max.) x kW FLA 4.0 LMU480HV 60 208 - 230 187 - 253 27.3 40 1 17.5 2 x 0.12 0.73 x 2 4.0 4.5 LMU540HV 60 208 - 230 1 187 - 253 29.4 40 1 18.5 2 x 0.12 0.73 x 2 4.8 5.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 0$; 2XWGRRU 8QLW 'LPHQVLRQV Figure 4: LMU480HV, LMU540HV, and LMU600HV Multi F MAX Outdoor Unit External Dimensions. 13 14-3/16 No.
MULTI F MULTI F MAX GENERAL DATA %UDQFK 'LVWULEXWLRQ 8QLW 6SHFL¿FDWLRQ (OHFWULFDO 'DWD Table 5: Branch Distribution Unit General Data. Model Number No. of Connectible Indoor Units1 Max. Nominal Capacity / Port (Btu/h)2 Max. Nominal Capacity / Branch Distribution Unit (Btu/h) Operation Temperature Range (°F DB) Unit Data Refrigerant Type Power Supply V, Ø, Hz Power Input (W) Rated Amps (A) Dimensions W x H x D (in.) Maximum Total System Piping (ft.
MULTI F MULTI F MAX GENERAL DATA %UDQFK 'LVWULEXWLRQ 8QLW 'LPHQVLRQV Figure 5: PMBD3620, PMBD3630, PMBD3640, and PMBD3641 External Dimensions. Unit: Inch 9-27/32 13-9/32 A B C D Ø3/4 11-23/32 Indoor Unit Piping Direction Ø3/8 9-21/32 Minimum 15-3/4 Minimum 15-3/4Mininum 15-3/4 1-31/32 1-31/32 Minimum 24 Mininum 3-15/16 Minimum 12 Side View Notes: 1. For PMBD3620 Unit, Ports A and B are Available. 2. For PMBD3630 Unit, Ports A, B, and C are Available. 3.
MULTI F MULTI F MAX 75$163257,1* /,)7,1* 7UDQVSRUWLQJ /LIWLQJ WKH 2XWGRRU Unit • At the time of delivery, the package must be checked for any damage (exterior and interior). Report any damage to the carrier claims agent immediately. • When lifting the unit, use lifting straps and place properly around the unit. • Always lift the unit using properly sized lifting straps rated to carry the unit weight. • (QVXUH WKH VWUDSV DUH ORQJ HQRXJK WR PDLQWDLQ D PD[LPXP RI D angle.
PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW MULTI F MULTI F MAX Selecting the Best Location for the Outdoor Unit DANGER Do not install the unit in an area where combustible gas will generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death. • Do not install the unit in a location where acidic solution and spray (sulfur) are often used as it can cause bodily injury or death.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Planning for Snow and Ice, continued. When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on sidewalks or driveways, which will create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking, leaking, and causing unsafe conditions from frozen condensate.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Outdoor Unit Service Access and Allowable Clearances MULTI F / MULTI F MAX Outdoor Unit Installation Manual Appropriate airflow through the outdoor unit coil is critical for proper unit operation. • Include enough space for airflow and for service access. If installing multiple outdoor units, avoid placing the units where the discharge of one unit will blow into the inlet side of an adjacent unit.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Clearance Requirements when Different Obstacles are Present, continued. (Unit: Inch) um im Min um 20" Minimum 40" im Max Minimum 40" Obstacles above and on the air intake side. Obstacles above, on the air intake side, and on both left and right sides 20" Min m imu Min imu m1 2" 12" Min um Obstacle just on the air discharge side.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Where there are obstacles above, and on both suction and discharge sides (discharge side obstacle is higher than the outdoor unit). Where there are obstacles on both suction and discharge sides (discharge side obstacle is higher than the outdoor unit). imu m2 0" Table 8: Ratio among H, A, and L.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Installing Outdoor Units Indoors LG Multi F / Multi F MAX outdoor units are engineered to be mounted outdoors and include technology designed to minimize the negative effects of winter weather’s freezing rain, sleet, and snow. Some building projects, however, necessitate placing the HVAC outdoor units indoors: • Lack of ground space. • Lack of an appropriate outdoor location that meets system design requirements.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet louver enclosed area. • Install a field-provided drain pan under the outdoor units and provide a path to a nearby floor drain.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Open Rate by Louver Radian Figure 9: Open Rate by Louver Radian Formula.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH ,QGRRU 8QLWV %UDQFK 'LVWULEXWLRQ 8QLWV Select a location for installing the indoor units that will meet the following conditions: • Within allowable parameters for proper connection to the outdoor unit (and branch distribution unit, if a Multi F MAX system). • So that condensation drainage can be conveniently routed away.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH %UDQFK 'LVWULEXWLRQ 8QLWV A-C (and PMBD3640 D) Connections: Liquid Pipe Ø1/4 Gas Pipe Ø3/8 PMBD3641 D Connections: Liquid Pipe Ø1/4 Gas Pipe Ø1/2 9-27/32 13-9/32 A B C D Ø3/4 11-23/32 Indoor Unit Piping Direction Unit: Inch Ø3/8 9-21/32 Minimum 15-3/4 Minimum 15-3/4Mininum 15-3/4 1-31/32 1-31/32 1-31/32 1-31/32 1-31/32 Controller Service Service Space Minimum 24 Mininum 3-15/16 Mininum 1-3/16 2-7/32 Cov
MULTI F MULTI F MAX 02817,1* $1&+25,1* THE OUTDOOR UNITS Outdoor Unit Platform Concrete Specifications • • • • Concrete foundations must be made of one part cement, two parts sand, and four parts gravel. The surface of the foundation must be finished with mortar with rounded edges, and weatherproofed. See table and figures for height, width, etc., requirements. Include an area for drainage around the foundation to ensure condensate thoroughly drains away from the outdoor unit.
MULTI F MULTI F MAX 02817,1* $1&+25,1* 7+( 287'225 %5$1&+ ',675,%87,21 81,76 Mounting / Anchoring the Outdoor Unit General Specifications, continued. Bolting the Outdoor Unit to the Platform Procedure 1. Ensure that the concrete platform will not degrade easily, and has enough strength to bear the weight of the unit. 2. Include an H-beam support. Firmly attach the corners, otherwise the support will bend. 3. Use a hexagon nut. 4.
MULTI F MULTI F MAX 02817,1* $1&+25,1* THE BRANCH DISTRIBUTION UNITS Ceiling Mount Installation, continued. Figure 19: Acceptable Branch Distribution Unit Ceiling Mount Orientations.
MULTI F MULTI F MAX LG AIR CONDITIONER TECHNICAL SOLUTION (LATS) LG Air Conditioner Technical Solution (LATS) Software A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning systems.
LG AIR CONDITIONER TECHNICAL SOLUTION (LATS) MULTI F MULTI F MAX LATS Generates a Complete Project Report LATS software also generates a report containing project design parameters, cooling and heating design data, system component performance, and capacity data.
MULTI F MULTI F MAX 5()5,*(5$17 6$)(7< 67$1'$5'6 DEVICE CONNECTION LIMITATIONS Refrigerant Safety Standards Device Connection Limitations • The minimum number of connected and operating indoor units to Multi F / Multi F MAX systems is two, taking into consideration the minimum combination ratio. • The maximum number of indoor units for each Multi F / Multi F MAX heat pump systems is: LMU18CHV = 2 LMU24CHV = 3 LMU30CHV = 4 LMU36CHV = 4 LMU480HV = 8 LMU540HV = 8 LMU600HV = 8 )RU DOORFDWHG FDSDFLW\ LQIR
MULTI F MULTI F MAX 5()5,*(5$17 6$)(7< 67$1'$5'6 DEVICE CONNECTION LIMITATIONS Multi F MAX Outdoor Unit Piping Length and Elevation Limitations 7RWDO SLSLQJ OHQJWK ȉ$ ȉ% IHHW Main pipe (Outdoor Unit to Minimum 9.
MULTI F MULTI F MAX SELECTING COPPER PIPING Selecting Field-Supplied Copper Piping Always follow local codes when selecting and installing copper pipe and piping system components. Approved piping for use with LG HVAC products will be marked “R410 RATED” along the length of the pipe. Piping wall thickness must meet local code requirements and be approved for a maximum operating pressure of 551 psi.
.LW FRQWDLQV WZR < EUDQFKHV RQH IRU OLTXLG DQG RQH IRU YDS MULTI F MULTI F MAX COPPER EXPANSION AND CONTRACTION Copper Expansion and Contraction MULTI F / MULTI F MAX Outdoor Unit Installation Manual Under normal operating conditions, the vapor pipe temperature of a 0XOWL ) V\VWHP FDQ YDU\ DV PXFK DV ) :LWK WKLV ODUJH YDULDQFH in pipe temperature, the designer must consider pipe expansion and contraction to avoid pipe and fitting fatigue failures.
SRU MULTI F MULTI F MAX COPPER EXPANSION AND CONTRACTION To find the anticipated expansion value: 1. From the table below, find the row corresponding with the actual feet of the straight pipe segment. 2. Estimate the minimum and maximum temperature of the pipe. 3. In the column showing the minimum pipe temperature, look up the anticipated expansion distance corresponding to the segment length. Do the same for the maximum pipe temperature. 4. Calculate the difference in the two expansion distance values.
MULTI F MULTI F MAX COPPER EXPANSION AND CONTRACTION Figure 26: Coiled Expansion Loops and Offsets (Plan View). L L R L MULTI F / MULTI F MAX Outdoor Unit Installation Manual R Large Tubing U-bend (>3/4 in.) Loop Small Tubing U-bend (<3/4 in.) All expansion loops and offsets must be installed in the horizontal plane to prevent the possibility of trapping oil. Loops and offsets in vertical risers must also be installed in a horizontal plane.
MULTI F MULTI F MAX PIPING HANDLING Piping Handling Keep Pipes Capped While Storing. Pipes used for the refrigerant piping system must include the specified thickness, and the interior must be clean. While handling and storing, do not bend or damage the pipes, and take care not to contaminate the interior with dust, moisture, etc. No moisture should be inside the piping. Moisture Possible - Significant hydrolysis of refrigerant oil. Problems - Refrigerant oil degradation.
REFRIGERANT SYSTEM ENGINEERING MULTI F MULTI F MAX Proper system operation depends on the installer using utmost care while assembling the piping system. The following pages are an overview of best practices when installing the refrigerant piping system. MULTI F / MULTI F MAX Outdoor Unit Installation Manual LG Electronics U.S.A.,Inc.
MULTI F MULTI F MAX REFRIGERANT SYSTEM ENGINEERING Obstacles Figure 27: Installing Piping Above and Below an Obstacle. When an obstacle, such as an I-beam or concrete T, is in the path of the planned refrigerant pipe run, it is best practice to route the pipe over the obstacle. If adequate space is not available to route the insulated pipe over the obstacle, then route the pipe under the obstacle.
REFRIGERANT SYSTEM ENGINEERING MULTI F MULTI F MAX Examples of Supports Figure 33: U-Bolt Support with Insulation. Figure 34: O-Ring Support with Insulation. Figure 35: Saddle-Type Support. Bolt Support at Intervals Between 5 and 6-3/4 Feet Insulation MULTI F / MULTI F MAX Outdoor Unit Installation Manual Bolt 1.5t Plate PVC PVC Do not compress the insulation with the saddle-type support.
MULTI F MULTI F MAX REFRIGERANT SYSTEM ENGINEERING Pipe Sleeves at Penetrations LG recommends that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and promote free movement of the pipe within the sleeve. Use 4"+ curved sheet metal saddles between the bottom surface of the pipe and the bottom surface of the penetration.
MULTI F MULTI F MAX FLARING AND BRAZING PROCEDURES Flaring and Brazing Procedures One of the main causes of refrigerant leaks is a defective connection. For LG HVAC systems, the installer needs to know how perform both flared and brazed connections successfully. MULTI F / MULTI F MAX Outdoor Unit Installation Manual • During installation, it is imperative to keep the piping system free of contaminants and debris such as copper burrs, slag, or carbon dust.
MULTI F MULTI F MAX FLARING AND BRAZING PROCEDURES Tightening the Flare Nuts Tightening Torque for Flare Nuts. Pipe Size (in. O.D.) Outside Diameter (mm) Tightening Torque (ft-lbs.) 13.0 - 18.0 1/4 6.35 9.52 24.6 - 30.4 3/8 39.8 - 47.7 1/2 12.7 45.4 - 59.3 15.88 5/8 71.5 - 87.5 19.05 3/4 Do not use polyolyester (POE) or any other type of mineral oil as a thread lubricant.
MULTI F MULTI F MAX INSTALLING MULTI F SYSTEMS Multi F Outdoor Unit to Indoor Unit Piping Connections MULTI F / MULTI F MAX Outdoor Unit Installation Manual Avoid Pipe Damage • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame. • See table below for Multi F outdoor unit connection types.
MULTI F MULTI F MAX INSTALLING MULTI F SYSTEMS Installing Field Piping to the Outdoor Unit Piping Connections Tightening the Flare Nuts Tightening Torque for Flare Nuts. Pipe Size (in. O.D.) Outside Diameter (mm) Tightening Torque (ft-lbs.) 13.0 - 18.0 1/4 6.35 9.52 24.6 - 30.4 3/8 39.8 - 47.7 1/2 12.7 45.4 - 59.3 15.88 5/8 71.5 - 87.5 19.05 3/4 1. When connecting the flare nuts, coat the flare (outside only) with polyvinyl ether (PVE) refrigeration oil only.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS 0XOWL ) 0$; 5HIULJHUDQW 3LSLQJ &RQQHFWLRQV 3LSLQJ 5RXWHV For Multi F MAX outdoor units, piping can be installed in one of four directions: front, side, back, and down (A). If the downward installation is chosen, the knockout hole in the base pan must be accessed (B). Whatever direction is chosen, plug the access holes with field-provided putty or insulation to fill all gaps (C). Figure 48: Multi F MAX Piping Installation.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Multi F MAX Outdoor Unit System Piping Connections Avoid Pipe Damage • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame. • See table below for Multi F MAX outdoor unit connection types. Table 25: Outdoor Unit Piping Connections.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Installing Field Piping to the Branch Distribution Unit Piping Connections MULTI F / MULTI F MAX Outdoor Unit Installation Manual 1. Remove any caps, etc., that could be on the branch distribution unit. 2. Tighten each piping connection individually following the “Tightening the Flare Nuts” procedure below. 3.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Figure 53: Possible Outdoor Unit or Branch Distribution Unit to Indoor Unit Connections. 1. 3/8 in. to 3/8 in. Connection Flare side to indoor unit Ø3/8 in. 2. 3/8 in. to 1/2 in. Connection Piping Flare nut Flare side to indoor unit Ø1/2 in. Piping Ø3/8 in. Flare nut Flare side to branch distribution unit or outdoor unit 3. 1/2 in. to 5/8 in. Connection Piping Flare nut Connection socket Ø1/2 in.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Multi F MAX Y-Branch Kit PMBL5620 MULTI F / MULTI F MAX Outdoor Unit Installation Manual The LG-supplied Y-Branch kit PMBL5620 MUST be used when installing two (2) branch distribution units in parallel on one (1) Multi F MAX system. Field-supplied fittings are not permitted. Each Y-Branch kit includes two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers.
MULTI F MULTI F MAX BUNDLING AND SPECIAL APPLICATIONS Bundling Indoor unit pipe Connection pipe Vinyl tape (wide) Wrap with vinyl tape Connecting cable Pipe Refrigerant Piping System Installation If a conduit or piping set cover is not used on the connection from the outdoor unit to the interior, bundle both insulated refrigerant pipes, the drain hose, and outdoor unit to indoor unit / branch distribution unit communication / connection (power) cable together with wide vinyl tape. 1.
CONDENSATE DRAIN PIPING MULTI F MULTI F MAX Condensate Drain Piping Outdoor unit requires condensate drain piping. Condensate drain pipe must be constructed with materials approved by local code. See pages 22 to 24 for information in reference to outdoor unit placement and condensate drainage. Drain Leak Test MULTI F / MULTI F MAX Outdoor Unit Installation Manual A leak test must be performed 24 hours after the drainage system has been installed.
MULTI F MULTI F MAX INSULATION )RU LQIRUPDWLRQ UHJDUGLQJ LQVXODWLRQ IRU XQGHUJURXQG RU SHQHWUDWLRQ VLWXDWLRQV VHH WKH ³*HQHUDO 5HIULJHUDQW 3LSLQJ 6\VWHP ,QIRUPDWLRQ´ VHFWLRQ General Piping System Insulation All refrigerant piping from the outdoor unit to the indoor units / branch distribution units (Multi F MAX systems only) must be insulated correctly for safety and usage.
MULTI F MULTI F MAX INSULATION Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM) Insulation Wall Thickness Requirements MULTI F / MULTI F MAX Outdoor Unit Installation Manual • Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature fluctuations. • Always properly insulate the piping. Insufficient insulation will result in condensation, reduced heating/cooling performance, etc.
MULTI F MULTI F MAX INSULATION • Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature fluctuations. • Be sure to fully insulate the piping connections. Installing the Insulation 1. Insulation material must be longer than the refrigerant piping. Each vapor and liquid piping must be insulated separately. 2.
ELECTRICAL MULTI F / MULTI F MAX Outdoor Unit Installation Manual *HQHUDO ,QIRUPDWLRQ • All power (line voltage) wiring and communication cable installation must be performed by trained service providers working in accordance with all local, state, and National Electrical Code (NEC) / UL / ETL federal regulations related to electrical equipment and wiring, and following the manufacturer product diagrams, requirements, and instructions in this manual. Electric shock can cause physical injury or death.
ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV Best practice dictates using solderless ring or fork terminals at all power wiring and communication cable terminations. Use copper bearing ring or fork terminals; do not use galvanized or nickel plate over steel. Use appropriate crimping tool to attach the ring or fork terminals at all power wiring and control cable terminations. To Install a Ring or Fork Terminal: 1.
ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV LG Terminal Connections Figure 73: JIS Screws. MULTI F / MULTI F MAX Outdoor Unit Installation Manual LG uses a “JIS” type of screw for all terminals; use a JIS screwdriver to tighten and loosen these screws and avoid damaging the terminal. Do not over tighten the connections — over tightening will damage the terminals — but firmly and securely attach the wiring in a way to prevent external forces from being imparted to the terminal block.
ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV &RPPXQLFDWLRQ &RQQHFWLRQ 3RZHU &DEOH 6SHFLILFDWLRQV • Use a conduit for the communications / connection (power) cable from the outdoor unit to the indoor units and branch distribution unit(s). Electrical interference my cause product malfunction. • Never ground the shield of the communications cable to the indoor unit frame or other grounded entities of the building. Ground the communications cable shield only at the outdoor unit.
ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV Figure 78: Typical Multi F System General Power / Communications System Schematic When Wiring is Less Than 130 Feet. Figure 79: Typical Multi F MAX System General Power / Communications System Schematic When Wiring is Less Than 130 Feet.
ELECTRICAL ,QVWDOODWLRQ Figure 82: Multi F LMU18CHV System Power Wiring and Communications Cable.
ELECTRICAL ,QVWDOODWLRQ Figure 83: Multi F LMU24CHV System Power Wiring and Communications Cable.
ELECTRICAL ,QVWDOODWLRQ Figure 84: Multi F LMU30CHV and LMU36CHV System Power Wiring and Communications Cable.
ELECTRICAL ,QVWDOODWLRQ Figure 85: Multi F MAX LMU480HV and LMU540HV System Power Wiring and Communications Cable.
ELECTRICAL ,QVWDOODWLRQ Figure 86: Multi F MAX LMU600HV System Power Wiring and Communications Cable.
ELECTRICAL ,QVWDOODWLRQ &RQQHFWLQJ WKH &RPPXQLFDWLRQV &RQQHFWLRQ 3RZHU &DEOHV MULTI F / MULTI F MAX Outdoor Unit Installation Manual 1. 2. 3. 4. Detach the outdoor unit panels by loosening the screws. Remove the control cover (if applicable) by loosening the screws. Remove the conduit knock outs or access holes. Pull the power wiring, and the communications / connection (power) cable into the outdoor unit (through the conduits, if applicable).
ELECTRICAL ,QVWDOODWLRQ Figure 89: Detailed Diagrams of Outdoor Unit PCB Terminal Connections.
ELECTRICAL ,QVWDOODWLRQ &RQQHFWLQJ WKH &RPPXQLFDWLRQV &RQQHFWLRQ 3RZHU &DEOH WR WKH %UDQFK Distributor Unit (Multi F MAX Systems Only) MULTI F / MULTI F MAX Outdoor Unit Installation Manual General Instructions • Always connect power wiring / communications cable matching the branch distribution unit terminals to their respective indoor units (Example for three-port branch distribution unit PMBD3630: A, B, and C).
ELECTRICAL ,QVWDOODWLRQ PI-485 PI-485 V-net Control Integration Board for Outdoor Units adapt Multi F / Multi F MAX systems to a LG VRF system central protocol for integration with LG central controllers. The PI-485 is installed in the Multi F / Multi F MAX outdoor unit. For more information on PI-485 installation, see the PI-485 installation manual. Figure 92: PI-485 Board (Appearance will differ depending on model). Figure 93: PI-485 Installation Area in Multi F and Multi F MAX Outdoor Units.
ELECTRICAL ,QVWDOODWLRQ • Communication cable from indoor unit to remote controller(s) is to be LG supplied or field supplied 22 AWG, 3-conductor, twisted, stranded, unshielded. Wiring must comply with all applicable local and national codes. • ,I XVLQJ WKH /* VXSSOLHG FDEOH DQG WKH OHQJWK QHHGV WR EH H[WHQGHG WKH /* ([WHQVLRQ .LW VROG VHSDUDWHO\ PXVW EH XVHG $ PD[LPXP RI four (4) kits (up to 165 feet) can be used. • Remote controllers have hardwired connections: SIG - 12V - GND (Comm.) terminals.
ELECTRICAL ,QVWDOODWLRQ Between Multiple Indoor Units Operating as a Group (Group Control) If any indoor units were specified to operate in unison: • Before running cable, decide which indoor unit will be the “Master.” The other indoor units in that group will be designated as “Slave(s).” The zone controller will be connected to the “Master.” • Set the pertinent DIP switch at each indoor unit to identify the Master and Slave(s).
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 7ULSOH /HDN 3UHVVXUH 7HVW 7ULSOH /HDN 3UHVVXUH 7HVW MULTI F / MULTI F MAX Outdoor Unit Installation Manual After the refrigerant piping installation is complete, perform a triple leak / pressure test. Triple leak / pressure test is performed between the outdoor unit and indoor units (and branch distribution units [Multi F MAX only]) to verify that refrigerant can flow through the system without danger of leaks or pressure losses.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 7ULSOH /HDN 3UHVVXUH DQG 'HHS (YDFXDWLRQ 7HVWV Triple Leak / Pressure Check Procedure, continued. The bubble solution must be a solution designed for refrigerant leak testing. Common soap solution must those contain chemicals that could corrode copper and brass, and cause product malfunction. never be used on refrigerant piping as 7. If the pressure does NOT drop for one (1) hour, the system passes the test. 8.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 'HHS (YDFXDWLRQ 7ULSOH (YDFXDWLRQ 7HVWV Deep Evacuation Procedure, continued. Figure 99: Evacuation Procedure Diagram. 3. (YDFXDWH WR VWDWLF PLFURQ OHYHO IRU DW OHDVW RQH KRXU MULTI F / MULTI F MAX Outdoor Unit Installation Manual 4. 0LFURQ OHYHO PXVW UHPDLQ IRU WZR KRXUV ,I WKH YDFXXP JDXJH ULVHV DQG VWRSV the system could contain moisture; therefore, it will be necessary to repeat the steps of vacuum break and drying.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 7ULSOH (YDFXDWLRQ 7HVW Triple Evacuation Procedure Steps 1. If this procedure is performed shortly after the leak / pressure test, the cap and core on the liquid and gas (vapor) suction Schrader ports must have already been removed, and the manifold must already be connected. If the procedure was not performed shortly after the leak / pressure test, make sure to remove the cap and core on the liquid and gas (vapor) suction Schrader ports.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH MULTI F / MULTI F MAX Outdoor Unit Installation Manual LG Multi F and Multi F MAX outdoor units ship from the factory with a charge of R410A refrigerant. A trim charge will 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.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH 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.
FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH MULTI F MULTI F MAX Refrigerant Charge MULTI F / MULTI F MAX Outdoor Unit Installation Manual 1. 2. 3. 4. Determine the refrigerant that is needed, applying the necessary formulas as outlined in the previous pages. Connect the charging cylinder to the charge hose on the manifold valve. Purge air from the charge hose by opening the valve at the bottom of the cylinder, and press the check valve on the manifold valve.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES &DXWLRQV IRU 5HIULJHUDQW /HDNV &DXWLRQV IRU 5HIULJHUDQW /HDNV ,QWURGXFWLRQ ASHRAE Standards 15 and 34 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required for this to occur safely. For R410A refrigerant, the maximum allowable concentration is 0.026 lbs.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES &DXWLRQV IRU 5HIULJHUDQW /HDNV To determine the volume of an occupied space, the designer must also determine which ones are connected, not connected, or ventilated (refer to Standard 34). MULTI F / MULTI F MAX Outdoor Unit Installation Manual If the calculated RCL is above the allowable limit, there are two primary methods used to lower the RCL: 1. Increase the volume of the occupied space. 2. Decrease the size of the refrigerant charge.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 7HVW 5XQ Test Run After the triple leak / pressure and evacuation procedures are complete, perform a test run. Figure 106: Piping Connection on the Outdoor Unit (Will Differ Depending on Outdoor Unit Model). Bolt Refrigerant Pipe Connection Location Bolt Before the Test Run 1. Check that all condensate tubing, refrigerant piping and power wiring, and communication / connection (power) cables are properly connected. 2.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Outdoor Unit DIP Switch Settings Figure 109: LMU18~36CHV Outdoor Unit DIP Switches (in Normal Operation Setting). System must be powered off, and then turned back on to apply DIP switch settings. Figure 110: LMU480-540HV Outdoor Unit DIP Switches (in Normal Operation Setting).
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Location of DIP Switches on Multi F and Multi F MAX Outdoor Units Figure 112: Multi F / Multi F MAX Outdoor Unit DIP Switch Locations.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV MULTI F / MULTI F MAX Outdoor Unit Installation Manual Wiring Error Check Figure 114: Wiring Error Check DIP Switch Setting. 3 Use to verify if wiring is properly installed. 1. Shut power down to the system. ON 2. Set DIP Switch 2 to ON. 3. Turn power on to the system. OFF 1 2 3 4 4. Check if the Red and Green LEDs on the outdoor unit PCB are ON (indicate indoor units are in forced operation mode). 1 2 3 4 5.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Reducing Power Consumption with Mode Lock Enables more efficient system operation by lowering the maximum power consumption value, as well as locks the mode of operation (Example: In a cooling-only server room application where permission to adjust the system mode is highly limited). Changing modes can cause a change in compressor frequency, which would cause problems with the setting.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Figure 121: Mode Lock DIP Switch Settings. MULTI F / MULTI F MAX Outdoor Unit Installation Manual Mode Lock Prevents mixed mode operation (mode change) in applications where only one mode is necessary. 1. Shut power down to the system. 2. For Only Cooling Mode Lock, set only DIP Switches 1 and 2 to ON. For Only Heating Mode Lock, set only DIP Switches 3 and 4 to ON. 3. Turn power on to the system.
MULTI F MULTI F MAX ERROR CODE TABLES Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi F / Multi F MAX product. Troubleshooting Using Error Codes Refer to the tables below and on the next page for error codes that are generated from the indoor and outdoor units.
MULTI F MULTI F MAX ERROR CODE TABLES Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi F / Multi F MAX product. Table 42: Outdoor Unit Error Codes.
MULTI F MULTI F MAX LG MONITORING VIEW (LGMV) DIAGNOSTIC SOFTWARE LG Monitoring View (LGMV) Diagnostic Software LG Monitoring View (LGMV) software allows the service technician or commissioning agent to connect a computer USB port to the Multi F / Multi F MAX system’s main printed circuit board (PCB) using an accessory cable without the need for a separate interface device. LGMV is available in different formats, including Mobile LGMV, which is an app for use on wireless devices.
MULTI F MULTI F MAX MULTI F / MULTI F MAX Outdoor Unit Installation Manual LG MONITORING VIEW (LGMV) DIAGNOSTIC SOFTWARE Additional screens can be accessed by tabs on the main screen. Additional screens include: 1. Cycleview: Graphic of internal components including: • Compressors showing actual speeds • EEVs • Indoor units • Liquid injection valves • Temperature and pressure sensors • Four-way reversing valve • Outdoor fans showing status and speeds Figure 129: LGMV Cycleview Screen. 2.
MULTI F MULTI F MAX LG SMART INVERTER MONITORING SYSTEM (SIMS) LG SIMS Figure 130: LG SIMS App and WLAN Module. The LG Smart Inverter Monitoring System (SIMS) WLAN module and the smart phone app together provide monitoring and troubleshooting capability for LG Multi F / Multi F MAX systems. SIMS functions only with LG Duct Free products, and can also be used with Single Zone one-to-one configurations such as the Single Zone Wall Mount systems.
LG SMART INVERTER MONITORING SYSTEM (SIMS) MULTI F / MULTI F MAX Outdoor Unit Installation Manual SIMS App Screens Outdoor Info / Component Screen Outdoor Info/ Temperature Screen Displays the following information: • Frequency • FAN1 RPM • FAN2 RPM • DC Link • Current • Voltage • EEV Mode • Restart Timer • Comp Mode • EEV Displays the following information: • Inv TD • Suction • Discharge • Cond Mid • Cond Out • Heatsink • Air Temp Indoor Info Tab Graph Info Tab Displays the following information: •
MULTI F MULTI F MAX MAINTENANCE RECOMMENDATIONS Table 43: Maintenance Recommendations.
MULTI F MULTI F MAX INSTALLATION CHECKLIST PAGE 1 Major Component Rough-In Description Check Piping Material, Components, and Insulation Description Check Multi F / Multi F MAX outdoor unit was connected properly per local code and the product installation procedures. All literature and bagged accessories have been removed from the fan discharge (ducted and cassette model indoor units).
MULTI F MULTI F MAX INSTALLATION CHECKLIST PAGE 2 Condensate Pump / Drain Installation Description Check Condensate piping installed correctly on indoor units. Material used is acceptable under local code. Insulated as necessary to prevent condensation. All condensate vertical risers are equal to or less than 27-1/2 inches from the bottom of the indoor unit. Indoor units with condensate pumps were level.
MULTI F MULTI F MAX INSTALLATION CHECKLIST PAGE 3 Major Component Rough-In Piping and Insulation Brazing 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.
MULTI F MULTI F MAX INSTALLATION CHECKLIST PAGE 4 Installation—Refrigerant Piping Installation—Branch Distribution Unit (Multi F MAX Systems Only) ,QVWDOODWLRQ²&RQGHQVDWH 3XPS 'UDLQ ,QVWDOODWLRQ Installation—Power Wire and Communications Cables 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.
MULTI F REFRIGERANT CHARGE WORKSHEET LG Multi F outdoor units ship from the factory with a charge of R410A refrigerant. A trim charge will need to be added to take into account additional piping length. To determine the additional refrigerant that is needed, apply the formula below, and record the results. If the total additional refrigerant charge value is a negative number, then an additional trim charge does not need to be added to the system.
MULTI F MAX REFRIGERANT CHARGE WORKSHEET LG Multi F MAX outdoor units ship from the factory with a charge of R410A refrigerant. A trim charge will need to be added to take into account additional piping length. To determine the additional refrigerant that is needed, apply the formula below, and record the results. If the total additional refrigerant charge value is a negative number, then an additional trim charge does not need to be added to the system.
20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.
