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 RSHUDWLRQ GXH WR LJQRULQJ DQ\ LQVWUXFWLRQV ZLOO FDXVH KDUP RU GDPDJH 7KH OHYHO RI VHULRXVQHVV LV FODVVL¿HG E\ WKH V\PEROV GHVFULEHG EHORZ MULTI F / MULTI F MAX Outdoor Unit Installation Manual TABLE OF SYMBOLS DANGER 7KLV V\PERO LQGLFDWHV DQ LPPLQHQWO\ KD]DUGRXV VLWXDWLRQ ZKLFK LI QRW DYRLGHG ZLOO UHVXOW LQ GHDWK RU V
MULTI F MULTI F MAX SAFETY INSTRUCTIONS Installation, continued Properly insulate all cold surfaces to prevent “sweating.” &ROG VXUIDFHV VXFK DV XQLQVXODWHG SLSLQJ FDQ JHQHUDWH FRQGHQVDWH WKDW FRXOG GULS FDXVLQJ D VOLSSHU\ VXUIDFH WKDW FUHDWHV D ULVN RI VOLSSLQJ IDOOLQJ DQG SHUVRQDO LQMXU\ 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 LQMXU\ RU GHDWK 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 U 30 3 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 Ind
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 6SHFL¿FDWLRQV 1 Capacity is rated with non-ducted indoor units, 0 ft. above sea level, with a 0 ft. level difference between outdoor and indoor units, and the following refrigerant pipe lengths: LMU183HV: 16.4 ft. x 2 = 32.8 ft. LMU243HV: 16.4 ft. x 3 = 49.2 ft. LMU303HV: 16.4 ft. x 4 = 65.6 ft. LMU363HV: 16.4 ft. x 4 = 65.6 ft. 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 Range MCA MOP LRA Tons No. (Min. to Max.) 1.5 2 2.5 3 LMU183HV LMU243HV LMU303HV LMU363HV 60 Voltage tolerance is ±10%. Maximum allowable voltage unbalance is 2%. RLA = Rated Load Amps. MCA = Minimum Circuit Ampacity. LRA = (Locked Rotor Amps) 10 208 - 230 187 - 253 15.8 16.0 18.4 18.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 'LPHQVLRQV Figure 1: LMU183HV and LMU243HV Multi F Outdoor Unit External Dimensions. Unit: Inch Gravity point Product Data Notes: 1. Unit must be installed in compliance with the installation manual. 2. Unit must be grounded in accordance with the local or state regulations and applicable national codes. 3. All field-supplied electrical components and materials must comply with the local, state, and national codes. 4.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 2XWGRRU 8QLW 'LPHQVLRQV Figure 2: LMU303HV and LMU363HV Multi F Outdoor Unit External Dimensions. [Unit : mm(inch)] MULTI F / MULTI F MAX Outdoor Unit Installation Manual Gravity point No. 12 Part Name 1 Air discharge grille 2 Vapor pipe connection 3 Liquid pipe connection 4 Main service valve (Liquid) 5 Main service valve (Vapor) Notes: 1. Unit must be installed in compliance with the installation manual. 2.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 0$; 2XWGRRU 8QLW 6SHFL¿FDWLRQV 1 Capacity is rated with non-ducted indoor units, 0 ft. above sea level, with a 0 ft. level difference between outdoor and indoor units, and the following refrigerant pipe lengths: /08 +9 IW 0DLQ IW %UDQFK [ IW All capacities are net with a combination ratio between 95 – 105%.
MULTI F MULTI F MAX GENERAL DATA Multi F MAX Outdoor Unit Electrical Data MULTI F / MULTI F MAX Outdoor Unit Installation Manual Table 4: LMU481HV, LMU541HV, and LMU601HV Electrical Data. Indoor Voltage Outdoor Unit Fan Motor(s) Unit Fan Nominal Unit Model Phase Hertz Voltage Range Compressor Compressor Motor Tons No. (Min. to MCA MOP Quantity Motor RLA Max.) kW x Qty. FLA x Qty. FLA 4.0 LMU481HV 32.7 40 1 22.0 2 x 0.12 1.60 x 2 4.0 4.5 LMU541HV 1 60 208 -230 187 - 253 32.7 40 1 22.0 2 x 0.12 1.60 x 2 4.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 0$; 2XWGRRU 8QLW 'LPHQVLRQV Figure 3: LMU481HV and LMU541HV External Dimensions. Chassis code : U60A Liquid Pipe Connection (Flare) Vapor Pipe Connection (Flare) Product Data Handle Power Wiring / Communication Cable Access Holes Air Outlet Pipe Routing Hole (Front) Pipe Routing Hole (Side) Pipe Routing Hole (Back) Notes: 1. Unit must be installed in compliance with the installation manual. 2.
MULTI F MULTI F MAX GENERAL DATA 0XOWL ) 0$; 2XWGRRU 8QLW 'LPHQVLRQV Figure 4: LMU601HV External Dimensions. Chassis code : U60A-B MULTI F / MULTI F MAX Outdoor Unit Installation Manual 13 24ïñ» 14ñ»๛ 15ïï» 6ï» (1»๛) 37ïñ» 3ïເ» 3ïñ»๛ ñï» Handle ï»๛ 24ïñ»๛ (3») Air Outlet 16ñ» 10ເ» 11ï» 4ñ» 1»๛ 5ñï» Liquid Pipe Connection (Flare) Vapor Pipe Connection (Flare) 5ïñ»๛ 7 Notes: 1. Unit must be installed in compliance with the installation manual. 2.
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 Connected Indoor Unit Capacity (Btu/h) Max. Nominal Capacity / BDU (Btu/h) Operation Temperature Range (°F DB) Maximum Humidity Unit Data Refrigerant Type Power Supply V, Ø, Hz Power Input (W) Rated Amps (A) Dimensions W x H x D (in.
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 'R QRW LQVWDOO WKH XQLW LQ DQ DUHD ZKHUH FRPEXVWLEOH JDV ZLOO JHQHUDWH IORZ VWDJQDWH RU OHDN 7KHVH FRQGLWLRQV FDQ FDXVH D ILUH UHVXOWLQJ LQ ERGLO\ LQMXU\ RU GHDWK • 'R QRW LQVWDOO WKH XQLW LQ D ORFDWLRQ ZKHUH DFLGLF VROXWLRQ DQG VSUD\ VXOIXU DUH RIWHQ XVHG DV LW FDQ FDXVH ERGLO\ LQMXU\ RU GHDWK • 'R QRW XVH WKH XQLW LQ HQYLURQPHQWV ZKHUH RLO VWHDP
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Planning for Snow and Ice, continued. CAUTION :KHQ GHFLGLQJ RQ D ORFDWLRQ WR SODFH WKH RXWGRRU XQLW EH VXUH WR FKRRVH DQ DUHD ZKHUH UXQ RII IURP GHIURVW ZLOO QRW DFFXPXODWH DQG IUHH]H RQ VLGHZDONV RU GULYHZD\V ZKLFK ZLOO FUHDWH XQVDIH FRQGLWLRQV 3URSHUO\ LQVWDOO DQG LQVXODWH DQ\ GUDLQ KRVHV WR SUHYHQW WKH KRVH IURP IUHH]LQJ FUDFNLQJ OHDNLQJ DQG FDXVLQJ XQVDIH FRQGLWLRQV IURP IUR]HQ FRQGHQVDWH Rooftop In
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW MULTI F / MULTI F MAX Outdoor Unit Installation Manual Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper operation. When installing the outdoor unit, consider service, inlet and outlet, and minimum allowable space requirements as illustrated in the diagrams on the following pages.
MULTI F MULTI F MAX PLACEMENT CONSIDERATIONS 6HOHFWLQJ WKH %HVW /RFDWLRQ IRU WKH 2XWGRRU 8QLW Multi F MAX Outdoor Unit (48,000, 54,000 and 60,000 Btu/h Capacity) Service Access and Allowable Clearances When installing the outdoor unit, consider service, inlet, and outlet, and minimum allowable space requirements as illustrated in the following diagrams.
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) Where there are obstacles on both suction and discharge sides (discharge side obstacle is higher than the outdoor unit). Obstacles above and on the air discharge side.
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 10: 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 21: 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. 7R UHGXFH WKH ULVN RI GHVLJQLQJ DQ LPSURSHU DSSOLHG V\VWHP RU RQH WKDW ZLOO QRW RSHUDWH FRUUHFWO\ /
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: LMU183HV = 2 LMU243HV = 3 LMU303HV = 4 LMU363HV = 4 LMU481HV = 8 LMU541HV = 8 LMU601HV = 8 )RU DOORFDWHG FDSDFLW\ LQIRU
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 for Each 16.4 feet Branch Distribution Units: (A) Piping Segment Pipe Length A) 0D[LPXP ȉ$ IHHW (ELF = Equivalent Length of pipe in 7RWDO EUDQFK SLSLQJ OHQJWK ȉ% IHHW Feet) Minimum 16.
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.
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. Refrigerant pipe along with the insulation jacket form a cohesive unit that expands and contracts together.
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 28: 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 /* (OHFWURQLFV 8 6 $ ,QF LV QRW UHVSRQVLEOH IRU DQ\ SLSLQJ FDOFXODWLRQV UHIULJHUDQW OHDNV GHJUDGDWLRQ RI SHUIRUPDQFH DQ\ RWKHU SRWHQWLDO SUREOHPV RU GDPDJHV FDXVHG E\ WKH LQWHUFRQQHFWLQJ SLSL
MULTI F MULTI F MAX REFRIGERANT SYSTEM ENGINEERING Obstacles Figure 29: 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 35: U-Bolt Support with Insulation. Figure 36: O-Ring Support with Insulation. Figure 37: 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 'R QRW FRPSUHVV WKH LQVXODWLRQ ZLWK WKH VDGGOH W\SH VXSSRUW ,I WKH LQVXODWLRQ LV FRPSUHVVHG LW ZLOO WHDU RSHQ DQG DOORZ FRQGHQVDWLRQ WR generate during product operatio
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 WKH VOHHYH 8VH FXUYHG VKHHW PHWDO VDGGOHV EHWZHHQ WKH ERWWRP VXUIDFH RI WKH SLSH DQG WKH ERWWRP VXUIDFH RI WKH SHQHWUDWLRQ Figure 42: Pipe Sleev
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 • 'XULQJ LQVWDOODWLRQ LW LV LPSHUDWLYH WR NHHS WKH SLSLQJ V\VWHP IUHH RI FRQWDPLQDQWV DQG GHEULV VXFK DV FRSSHU EXUUV VODJ RU FDUERQ GXVW Do not use kinked pipe caused by excessive bendi
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 • :KHQ URXWLQJ ILHOG SURYLGHG SLSLQJ 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 bottom (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 50: Multi F MAX Piping Installation.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Branch Distribution to Indoor Unit Piping Connections • Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appropriate branch distribution ports. • Clearly note on the indoor unit’s refrigerant piping (liquid, vapor) which branch distribution port it is connected to (A, B, C, D). Figure 52: Branch Distribution Piping Connections.
MULTI F MULTI F MAX INSTALLING MULTI F MAX SYSTEMS Installing Field Piping to the Branch Distribution Unit Piping Connections 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 56: Socket Connection. Figure 57: 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 Refrigerant Piping System Installation Flare side to indoor unit Ø1/2 in. Piping Ø3/8 in. Flare nut Connection socket Ø3/8 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. • $OZD\V SURSHUO\ LQVXODWH WKH SLSLQJ ,QVXIILFLHQW LQVXODWLRQ ZLOO UHVXOW LQ FRQGHQVDWLRQ UHGXFHG KHDWLQJ FRROLQJ SHUIRUPDQFH HWF $OVR LI WKH SLSHV DUHQ¶W LQVXODWHG SURS
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.
MULTI F MULTI F MAX ELECTRICAL MULTI F / MULTI F MAX Outdoor Unit Installation Manual *HQHUDO ,QIRUPDWLRQ • $OO SRZHU OLQH YROWDJH ZLULQJ DQG FRPPXQLFDWLRQ FDEOH LQVWDOODWLRQ PXVW EH SHUIRUPHG E\ WUDLQHG VHUYLFH SURYLGHUV ZRUNLQJ LQ DFFRUGDQFH ZLWK DOO ORFDO VWDWH DQG 1DWLRQDO (OHFWULFDO &RGH 1(& 8/ (7/ IHGHUDO UHJXODWLRQV UHODWHG WR HOHFWULFDO HTXLSPHQW DQG ZLULQJ DQG IROORZLQJ WKH PDQXIDFWXUHU SURGXFW GLDJUDPV UHTXLUHPHQWV DQG LQVWUXFWLRQV LQ WKLV PDQXDO (OHFWULF VKRFN FDQ FDXVH SK\VLFD
MULTI F MULTI F MAX 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.
MULTI F MULTI F MAX ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV LG Terminal Connections Figure 77: 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.
MULTI F MULTI F MAX ELECTRICAL &RQQHFWLRQV DQG 6SHFL¿FDWLRQV &RPPXQLFDWLRQ &RQQHFWLRQ 3RZHU &DEOH 6SHFLILFDWLRQV • Insulation material as required by local code. • 5DWHG IRU FRQWLQXRXV H[SRVXUH RI WHPSHUDWXUHV XS WR ) • Firmly attach the cable; provide slack but secure in a way to prevent external forces from being imparted on the terminal block. • Wiring must be completed without splices.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 83: Multi F LMU183HV System Power Wiring and Communications Cable.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 84: Multi F LMU243HV System Power Wiring and Communications Cable.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 85: Multi F LMU303HV and LMU363HV System Power Wiring and Communications Cable.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 86: Multi F MAX LMU481HV and LMU541HV System Power Wiring and Communications Cable.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 87: Multi F MAX LMU601HV System Power Wiring and Communications Cable.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ &RQQHFWLQJ WKH &RPPXQLFDWLRQV &RQQHFWLRQ 3RZHU &DEOHV 1. 2. 3. 4. Figure 88: Connecting the Power Wiring / Communications Cables to the Outdoor Unit (LMU183-243303-363HV) (Appearances Will Vary).
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Figure 91: Detailed Diagrams of Outdoor Unit PCB Terminal Connections.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ &RQQHFWLQJ WKH &RPPXQLFDWLRQV &RQQHFWLRQ 3RZHU &DEOH WR WKH %UDQFK Distributor Unit (Multi F MAX Systems Only) 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).
MULTI F MULTI F MAX 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 95: PI-485 Installation Area in Multi F and Multi F MAX Outdoor Units.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ From Indoor Units to Remote Controllers • 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.
MULTI F MULTI F MAX ELECTRICAL ,QVWDOODWLRQ Between Multiple Indoor Units Operating as a Group (Group Control) Figure 98: Example of Indoor Unit Group to Zone Controller Connections (Sig-12V-GND [Comm.] Terminal). MULTI F / MULTI F MAX Outdoor Unit Installation Manual If any indoor units were specified to operate in unison: • Before running cable, decide which indoor unit will be the “Main.” The other indoor units in that group will be designated as “Sub(s).
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 7ULSOH /HDN 3UHVVXUH 7HVW 7ULSOH /HDN 3UHVVXUH 7HVW 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.
FINAL INSTALLATION PROCEDURES 7ULSOH /HDN 3UHVVXUH DQG 'HHS (YDFXDWLRQ 7HVWV MULTI F MULTI F MAX Triple Leak / Pressure Check Procedure, continued. NOTE The bubble solution must be a solution designed for refrigerant leak testing. Common soap solution must WKRVH FRQWDLQ FKHPLFDOV WKDW FRXOG FRUURGH FRSSHU DQG EUDVV DQG FDXVH SURGXFW PDOIXQFWLRQ never be used on refrigerant piping as MULTI F / MULTI F MAX Outdoor Unit Installation Manual 7.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 'HHS (YDFXDWLRQ 7ULSOH (YDFXDWLRQ 7HVWV Deep Evacuation Procedure, continued. Figure 101: Evacuation Procedure Diagram. 3. (YDFXDWH WR VWDWLF PLFURQ OHYHO IRU DW OHDVW RQH KRXU 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.
FINAL INSTALLATION PROCEDURES 7ULSOH (YDFXDWLRQ 7HVW MULTI F MULTI F MAX Triple Evacuation Procedure Steps MULTI F / MULTI F MAX Outdoor Unit Installation Manual 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.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH 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. 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 MULTI F MAX FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH Multi F MAX Systems MULTI F / MULTI F MAX Outdoor Unit Installation Manual Additional charge (lbs.) = (Total Main Piping Length [A] - Chargeless Pipe Length of Main Pipe [L]) x a 7RWDO ,QVWDOOHG /HQJWK RI %UDQFK >% % % @ ± &KDUJHOHVV %UDQFK /HQJWK >%@ [ E - CF (Correction Factor) x 3.53 • Number of installed length of branches depends on system specifications.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES 5HIULJHUDQW &KDUJH Refrigerant Charge :KHQ LQVWDOOLQJ RU UHORFDWLQJ WKH RXWGRRU XQLW PDNH VXUH WKDW QR VXEVWDQFH RWKHU WKDQ WKH VSHFL¿HG UHIULJHUDQW 5 $ HQWHUV WKH UHIULJHUDQW FLUFXLW 7KH SUHVHQFH RI IRUHLJQ VXEVWDQFHV VXFK DV DLU FDQ FDXVH DQ DEQRUPDO SUHVVXUH ULVH DQG ZLOO UHVXOW LQ H[SORVLRQ DQG SK\VLFDO LQMXU\ Figure 104: Charging the Refrigerant.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES &DXWLRQV IRU 5HIULJHUDQW /HDNV &DXWLRQV IRU 5HIULJHUDQW /HDNV ,QWURGXFWLRQ MULTI F / MULTI F MAX Outdoor Unit Installation Manual 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.
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). 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. Figure 106: Examples of Zones. Without Partition.
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 108: Piping Connection on the Outdoor Unit (Will Differ Depending on Outdoor Unit Model). Mounting Bolt Mounting Bolt Refrigerant Pipe Connection Location MULTI F / MULTI F MAX Outdoor Unit Installation Manual Before the Test Run 1.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Outdoor Unit DIP Switch Settings Figure 111: LMU183-243-303363HV Outdoor Unit DIP Switches (in Normal Operation Setting). System must be powered off, and then turned back on to apply DIP switch settings. Figure 112: LMU481-541-601HV Outdoor Unit DIP Switches (in Normal Operation Setting). ON Turn off the circuit breaker or shut off the power source of the product EHIRUH VHWWLQJ WKH ',3 VZLWFK 7KHUH LV ULVN RI SK\
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 113: Multi F Outdoor Unit DIP Switch Locations.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Wiring Error Check Figure 116: LMU183-243-303363HV Wiring Error Check DIP Switch Setting. 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 4. Check if the Red and Green LEDs on the outdoor unit PCB are ON 1 2 (indicate indoor units are in forced operation mode). 1 2 5.
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV MULTI F / MULTI F MAX Outdoor Unit Installation Manual 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).
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV Figure 126: LMU183-243-303-363HV Mode Lock DIP Switch Settings. Mode Lock Only Cooling 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. 2QO\ WKH ¿UVW IRXU ',3 VZLW
MULTI F MULTI F MAX FINAL INSTALLATION PROCEDURES ',3 6ZLWFK 6HWWLQJV IRU 2SWLRQDO 0RGHV PCB Display The cycle data can be checked without using LG Monitoring View (LGMV) Diagnostic Software by pushing the tact switch for most models. See below for the types of cycle information that will be displayed in LGMV. After first page is displayed, the second page will be subsequently displayed.
MULTI F MULTI F MAX ERROR CODE TABLES 3OHDVH UHIHU WR WKH 6DIHW\ 3UHFDXWLRQV RQ SDJHV IRU PRUH GHWDLO WR SUHYHQW LQMXU\ RU GHDWK UHJDUGLQJ WKH RSHUDWLRQ DQG service troubleshooting of the Multi F / Multi F MAX product. Troubleshooting Using Error Codes Refer to the tables below and on the next pages for error codes that are generated from the indoor and outdoor units.
MULTI F MULTI F MAX ERROR CODE TABLES 3OHDVH UHIHU WR WKH 6DIHW\ 3UHFDXWLRQV RQ SDJHV IRU PRUH GHWDLO WR SUHYHQW LQMXU\ RU GHDWK UHJDUGLQJ WKH RSHUDWLRQ DQG service troubleshooting of the Multi F / Multi F MAX product. Four-Way Ceiling Cassette Indoor Unit Error Indicator Figure 133: Ceiling Cassette Display. LED Forced Operation Button MULTI F / MULTI F MAX Outdoor Unit Installation Manual Table 43: Four-Way Ceiling Cassette Indoor Unit LED Indications.
MULTI F MULTI F MAX ERROR CODE TABLES 3OHDVH UHIHU WR WKH 6DIHW\ 3UHFDXWLRQV RQ SDJHV IRU PRUH GHWDLO WR SUHYHQW LQMXU\ RU GHDWK UHJDUGLQJ WKH RSHUDWLRQ DQG service troubleshooting of the Multi F / Multi F MAX product. Table 45: Outdoor Unit Error Codes. LED01 (Red) LED02 (Green) DC Peak (IPM Fault); Compressor DC voltage is too high 2X 1X OFF Current Transformer2 (CT2) error; Alternating current (AC) input is too high 2X 2X OFF 2X 3X OFF Description 21 22 23 No.
LG MONITORING VIEW (LGMV) DIAGNOSTIC SOFTWARE MULTI F MULTI F MAX MULTI F / MULTI F MAX Outdoor Unit Installation Manual 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.
MULTI F MULTI F MAX LG MONITORING VIEW (LGMV) DIAGNOSTIC SOFTWARE Additional screens can be accessed by tabs on the main screen. Additional screens include: 1. Cycleview: Graphical display 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 136: LGMV Cycleview Screen. 2.
MULTI F MULTI F MAX MAINTENANCE RECOMMENDATIONS Table 46: 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 vicinity (ducted and cassette model indoor units).
MULTI F MULTI F MAX INSTALLATION CHECKLIST PAGE 2 Condensate Pump / Drain Installation Description Check Condensate piping is 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 are 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 MULTI F MAX 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 MULTI F MAX 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.
LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.
