MULTI F MULTI F MAX STANDARD WALL-MOUNTED INDOOR UNIT INSTALLATION MANUAL • LMN078HVT 7 kBtu • LSN090HSV4 9 kBtu • LSN120HSV4 12 kBtu • LMN158HVT 15 kBtu • LSN180HSV4 18 kBtu • LMN248HVT 24 kBtu
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MULTI F MULTI F MAX TABLE OF CONTENTS CONTENTS Safety Instructions ��������������������������������������������������������������������������������������������������������������4 Introduction..........................................................................................................................9 Unit Nomenclature............................................................................................................. 11 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 below. Multi F Standard Wall-Mounted Indoor Unit 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 CAUTION Be very careful when transporting the product. • Do not attempt to carry the product without assistance. • Some products use polypropylene bands for packaging. Do not use polypropylene bands to lift the unit. • Suspend the unit from the base at specified positions. • Support the unit at a minimum of four points to avoid slippage from rigging apparatus.
MULTI F MULTI F MAX SAFETY INSTRUCTIONS WIRING DANGER High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Multi F Standard Wall-Mounted Indoor Unit Always ground the unit following local, state, and National Electrical Codes.
MULTI F MULTI F MAX SAFETY INSTRUCTIONS OPERATION DANGER Do not provide power to or operate the unit if it is flooded or submerged. There is risk of fire, electric shock, physical injury or death. Use a dedicated power source for this product. There is risk of fire, electric shock, physical injury or death. Do not operate the disconnect switch with wet hands. There is risk of fire, electric shock, physical injury or death.
Multi F Standard Wall-Mounted Indoor Unit MULTI F MULTI F MAX 8 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 INTRODUCTION Multi F and Multi F MAX Standard Wall-Mounted Units This manual describes how to install the LG Multi F and Multi F MAX (Multi Zone) Standard Wall-Mounted Indoor Units (IDU) for Multi F heat pump systems. Table 1 lists the available models. Refer to LG’s Multi F Indoor Unit Engineering Manual for complete detailed engineering data and selection procedures.
MULTI F MULTI F MAX INTRODUCTION Table 1: Multi F Standard Wall-Mounted Indoor Units Multi F Standard Wall-Mounted Indoor Unit Typical Unit Model Number Nominal Capacity Cooling (Btu) Heating (Btu) LMN078HVT 7,000 8,100 LSN090HSV4 9,000 10,400 LSN120HSV4 12,000 13,800 LMN158HVT 14,300 16,500 LSN180HSV4 18,000 20,800 LMN248HVT 24,000 27,000 Table 2: Included Items Part Quantity Installation Plate One (1) Image 7,000 ~ 15,000 Btu/h Indoor Units 18,000 and 24,000 Btu/h Indoor Uni
MULTI F MULTI F MAX UNIT NOMENCLATURE Multi F Multi-Zone Systems — Indoor Units L M N 158 HVT L = LG Type: M = Multi-Zone A/S = Single Zone (Gen 4 Single Zone units also compatible with Multi Zone) Component: AN: Art Cool™ Wall-Mounted Indoor Unit Installation Manual 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 No
MULTI F MULTI F MAX GENERAL DATA R410A Refrigerant R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant. All piping system materials installed must have a higher resisting pressure than the materials traditionally used in R22 systems. R410A refrigerant is an azeotrope of R32 and R125, mixed at 50:50. The ozone depletion potential (ODP) is 0. WARNING • Do not place refrigerant cylinder in direct sunlight. Refrigerant cylinder may explode causing severe injury or death.
MULTI F MULTI F MAX GENERAL DATA Specifications Table 4: Multi F Multi Zone Standard Wall-Mounted Indoor Unit Specifications Model Name LMN078HVT LSN090HSV4 LSN120HSV4 LMN158HVT LSN180HSV4 LMN248HVT Nominal Cooling Capacity (Btu/h)1 7,000 9,000 12,000 14,300 18,000 24,000 Nominal Heating Capacity (Btu/h)1 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 14.4 x 1 76.
MULTI F MULTI F MAX GENERAL DATA Refrigerant Piping Gas pipe connection port (flare connection) Cooling Thermistor for Evaporator Outlet Temperature M Thermistor for Evaporator Inlet Temperature Multi F Standard Wall-Mounted Indoor Unit Cross Flow Fan Thermistor for Indoor Air Temperature Heating Heat Exchanger Liquid pipe connection port (flare connection) Table 5: Multi F Multi Zone Standard Wall-Mounted Indoor Unit Refrigerant Pipe Connection Port Diameters Model No.
MULTI F MULTI F MAX GENERAL DATA Typical Multi F/Multi F Max Systems Major System Components A typical Multi F system consists of an outdoor unit (ODU), refrigerant piping, and two to four indoor units (IDUs). The standard wall-mounted units described in this manual are one of the types of IDUs that can be connected to a Multi F system. A typical Multi F Max system consists of an ODU, refrigerant piping, one or two branch distribution units (BDU), and two to eight IDUs.
MULTI F MULTI F MAX GENERAL DATA Typical Multi F/Multi F Max Systems Typical Multi F MAX System with Two Branch Distribution Units ODU A Y-Branch IDU: Indoor Unit. B A BD: Branch Distribution Unit(s). ΣB: Branch Piping (Branch Distribution Unit[s] to Indoor Unit[s]). IDU B IDU h4 ≤ 49.2 feet B A IDU BDU h2 ≤ 49.2 feet ΣA: Main Piping. Multi F Standard Wall-Mounted Indoor Unit IDU BDU B IDU B h1 ≤ 98.4 feet h3 ≤ 32.
MULTI F MULTI F MAX GENERAL DATA Refrigerant Piping Requirements Field Supplied Refrigerant Piping 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. Tube wall thickness should meet local code requirements and be approved for a maximum operating pressure of 551 psi.
GENERAL INSTALLATION GUIDELINES Location Selection MULTI F MULTI F MAX DANGER To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. Failure to do so will cause serious bodily injury or death. Before beginning installation, read the safety summary at the beginning of this manual.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Inspection Unpack and Inspect for Freight Damage CAUTION Shipping and net weights of the wall-mounted units are listed in Table 4. To help avoid injury to personnel and damage to the unit, use two people when carrying a unit by hand. Note: Do not unpack the unit and remove the protective materials until ready to install. Before unpacking, carefully move the packaged unit to a work area near the installation location.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Install Wall-Mounted IDU Chassis WARNING • Ensure the unit is properly installed. Incorrectly installed units can result in degraded performance or an inoperative unit/system. • Use a level indicator to ensure the installation plate and chassis are installed on a level plane. • If the unit is installed near a body of water, certain components are at risk of being corroded.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Install Wall-Mounted IDU Chassis Drilling Piping Hole in the Wall Figure 6: Drilling Piping Hole WALL Indoor Use caution when drilling holes through walls. Drilling into power wiring in the wall can cause serious bodily injury or death. Bushing Sleeve 1. Using a 2-5/8 (ø 65mm) inch hole core drill bit, drill a hole at either the right or left side of the wall mounting (Figure 6).
GENERAL INSTALLATION GUIDELINES Refrigerant Piping MULTI F MULTI F MAX Preparing for Piping Installation to the Indoor Unit Note: Do not bend the piping / drain hose from side to side, it may damage the components. 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).
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping Multi F MAX Y-Branch Kit PMBL5620 The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected to 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. Y-branches may be installed in horizontal or vertical configurations.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping Selecting Field-Supplied Copper Tubing Copper is the only approved refrigerant pipe material for use with Duct Free System products, and LG recommends seamless phosphorous deoxidized ACR type copper pipe, hard-drawn rigid type “K” or “L”, or annealed-tempered, copper pipe. • Drawn temper (rigid) ACR copper tubing is available in sizes 3/8 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping No Pipe Size Substitutions Note: Use only the pipe size recommended by this installation manual. Using a different size is prohibited and may result in system malfunction or failure. Copper Expansion and Contraction Under normal operating conditions, the vapor pipe temperature of a Duct Free System can vary as much as 280°F.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping See table below for precalculated anticipated expansion for various pipe sizes and lengths of refrigerant tubing. 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.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping Inserts and Pipe Supports 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. Anti-vibration Material Insert Pipe Supports Figure 19: Installing an Insert Into a Concrete Beam.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping Examples of Supports Figure 24: U-Bolt Support with Insulation. Figure 26: Saddle-Type Support. Figure 25: O-Ring Support with Insulation. Bolt Insulation Support at Intervals Between 5 and 6-3/4 Feet Bolt 1.5t Plate Multi F Standard Wall-Mounted Indoor Unit PVC PVC Note: Do not compress the insulation with the saddle-type support.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Refrigerant Piping Note: Pipe Sleeves at Penetrations Pipe diameter plus insulation thickness determines wall penetration diameter. For example: Diameter of Gas Piping: 1/2" Diameter of Liquid Piping: 1/4" Thickness of Gas Piping Insulation: 0.4" x 2 Thickness of Liquid Piping Insulation: 0.4" x 2 Surplus: 0.8" Sleeve diameter (total): 3.
MULTI F MULTI F MAX GENERAL INSTALLATION GUIDELINES Piping Materials and Handling Piping Materials and Handling Figure 34: Keep Piping 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. See Table 19 for care of piping.
MULTI F MULTI F MAX PIPING CONNECTIONS Piping Preparation Piping Preparation • Do not allow the refrigerant to leak during brazing; if refrigerant combusts, it generates a toxic gas which can cause physical injury or death. • Do not braze in an enclosed location, and always test for gas leaks before/after brazing. Gas leaks can cause physical injury or death. • After brazing, check for refrigerant gas leaks. Refrigerant gas leaks can cause physical injury or death.
MULTI F MULTI F MAX PIPING CONNECTIONS IDU to ODU Multi F Outdoor Unit to Indoor Unit 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. • See table below for Multi F outdoor unit connection types.
MULTI F MULTI F MAX PIPING CONNECTIONS IDU to ODU Multi F System Piping Connections Note: Do not use polyolyester (POE) or any other type of mineral oil as a thread lubricant. These lubricants are not compatible with PVE oil used in this system and create oil sludge leading to equipment damage and system malfunction. 1. When connecting the flare nuts, coat the flare (inside and outside) with polyvinyl ether (PVE) refrigeration oil only. 2.
MULTI F MULTI F MAX PIPING CONNECTIONS IDU to ODU Refrigerant Safety WARNING Verify the maximum refrigerant concentration level in the space where the indoor unit will be mounted meets the concentration limit for the application. There is risk of asphyxiation from oxygen deprivation. Multi F Standard Wall-Mounted Indoor Unit ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space.
MULTI F MULTI F MAX PIPING CONNECTIONS Piping Insulation 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. 2. Tighten the flare nut with a torque wrench. 3. Attach the drain tube piping to the indoor unit drain hose as shown. Figure 43: Extending the Drain Hose. Note: If the drain hose is routed inside a room, add insulation to prevent condensation from forming.
MULTI F MULTI F MAX PIPING CONNECTIONS IDU to ODU Installing Refrigerant Piping Insulation WARNING Ensure all refrigerant piping is insulated. Exposed refrigerant piping may cause burns if touched. Wrap all refrigerant and condensate piping including field-provided isolation ball valves and flexible pipe connection kits provided by LG. All pipes must be insulated and each pipe must be separately wrapped. Any exposed piping may generate condensate or will cause burns if touched.
MULTI F MULTI F MAX PIPING CONNECTIONS Drain Piping Drain Piping The standard wall-mounted indoor units have a factory-provided flexible pipe (27/32” O.D./ 5/8” I.D.) to drain condensate water. The flexible pipe connects to field-provided drain pipe. Use materials that comply with local codes for drain pipe and insulation. 1. Install the flexible drain pipe as straight as possible; sharp angles may cause the pipe to deteriorate and may crack over time. 2.
MULTI F MULTI F MAX Multi F Standard Wall-Mounted Indoor Unit ELECTRICAL WIRING • All power wiring and communication cable installation must be performed by trained service providers working in accordance with local, state, and National Electrical Code regulations related to electrical equipment and wiring, and following the instructions in this manual. Electric shock can cause physical injury or death. • Undersized wiring may lead to unacceptable voltage at the unit and may cause a fire hazard.
MULTI F MULTI F MAX ELECTRICAL WIRING Power Wiring Specifications and Best Practices Line Voltage Wiring and Communications Cable Installation For both Multi F and Multi F MAX systems, line voltage is wired to the outdoor unit only. The outdoor unit will supply power to the branch distribution units (Multi F MAX systems only) and the indoor units through the power wiring/communications cable. Electrical Specifications 1. 2. 3. 4. 5.
ELECTRICAL WIRING Power Wiring Specifications and Best Practices/Controller Options MULTI F MULTI F MAX Power Supply/Power Wiring Specifications, continued • If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death. Note: Multi F Standard Wall-Mounted Indoor Unit • Never apply line voltage power to the communications cable terminal block. If contact is made, the PCBs may be damaged.
ELECTRICAL WIRING MULTI F MULTI F MAX Indoor Unit Electrical Connections Guidelines Power Wiring / Communications Cable Guidelines • • • • • • • • These instructions are for the IDU only. For ODU wiring, refer to the ODU installation manual. 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.
ELECTRICAL WIRING MULTI F MULTI F MAX Indoor Unit Electrical Connections Procedure Figure 54: Latch over Screws on Bottom Panel, Indoor Unit Multi F Standard Wall-Mounted Indoor Unit Be sure there is no power input to the system before proceeding with these connections. There is risk of electrical shock resulting in serious bodily injury or death. 1. At the bottom panel of the indoor unit, unsnap the latches covering the phillips head screws (Figure 54).
ELECTRICAL WIRING MULTI F MULTI F MAX Indoor Unit Electrical Connections Figure 58: Typical Indoor Unit Terminal Block with Grounding Cable 090HSV4,120HSV4, 180HSV4 Figure 59: Typical Indoor Unit Terminal Block Connections Terminal Block Expanded View Terminal Block Connecting Cables Cable Restrainer Grounding Cable Installation Manual Figure 60: Indoor Unit to Outdoor Unit / Branch Distribution Unit Terminal Connections—LMN078HVT, LSN090HSV4, LSN120HSV4, and LMN158HVT.
ELECTRICAL WIRING MULTI F MULTI F MAX Self Diagnosis Functions LG Monitoring View (LGMV) Diagnostic Software Multi F Standard Wall-Mounted Indoor Unit LGMV software (PRCTSL1 and PRCTFE1) allows the service technician or commissioning agent to connect a computer USB port to the outdoor unit’s main printed circuit board (PCB) using an accessory cable.
ELECTRICAL WIRING MULTI F MULTI F MAX Self Diagnosis Functions LG Monitoring View (LGMV) Diagnostic Software and Cable - Continued 5. Data • Data Saving Start: Recording of real time data to a separate file created to be stored on the user’s computer. • Data Loading Start: Recorded data from a saved “.CSV” file can be loaded to create an LGMV session. 6. Monitoring • Electrical: The lower half of main screen is changed to show Inverter Compressor Amps, Volts, Power Hz, Inverter control board fan Hz.
MULTI F MULTI F MAX ELECTRICAL WIRING LG SIMS - Self Diagnosis Functions The SIMs WLAN module and the smart phone app together provide monitoring and troubleshooting capability for LG Duct Free Systems. SIMs functions only with LG Duct Free products (Figure 66). Figure 66: LG SIMs App and WLAN Module SIMs can display and graph operational data for the air conditioner system including the indoor unit and the outdoor unit. SIMs also displays error codes and a troubleshooting guide.
ELECTRICAL WIRING MULTI F MULTI F MAX LG SIMS - Self Diagnosis Functions SIMs App Screens Outdoor Info/ Component Screen Displays the following information: • • • • • • • • • • Frequency FAN1 RPM FAN2 RPM DC Link Current Voltage EEV Mode Restart Timer Comp Mode EEV • • • • • • • Inv TD Suction Discharge Cond Mid Cond Out Heatsink Air Temp Installation Manual Indoor Info Tab Displays the following information: • Frequency • Operation • THM Mode • REM Mode • FAN • EEV • Air Temp • Pipe-in • Pipe-mid •
ELECTRICAL WIRING MULTI F MULTI F MAX Optional Wall-Mounted Sensor and Controller Wall-Mounted Sensor Installation Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct sunlight and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the handy box approximately five feet above the finished floor.
MULTI F MULTI F MAX TROUBLESHOOTING Error Codes Troubleshooting Using Error Codes Refer to Table 28 for information on error codes generated from the indoor and outdoor units. These codes are the most common for these units. Your particular model duct free system might generate additional codes not listed here. Please contact LG Support if you see these types of errors and a simple power down and boot up has not corrected the issue. You should not attempt to repair the system yourself.
CAUTIONS FOR REFRIGERANT LEAKS Refrigerant Leaks MULTI F MULTI F MAX Cautions for Refrigerant Leaks ASHRAE Standards 15-2010 and 34-2010 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./ft3 per 1,000 ft3 of air in an occupied space.
INSTALLATION CHECKLIST MULTI F MULTI F MAX PAGE 1 of 2 System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________ Checked by:___________________________________ Date:__________________ Signature:____________________________________ Major Component Rough-In Description The unit was connected properly per local code and the product installation procedures. All literature and bagged accessories have been removed from the fan discharge.
INSTALLATION CHECKLIST MULTI F MULTI F MAX PAGE 2 of 2 System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________ Checked by:___________________________________ Date:__________________ Signature:____________________________________ Multi F Standard Wall-Mounted Indoor Unit Refrigerant Piping – continued A torque wrench and backup wrench were used to tighten all flare connections.
MULTI F MULTI F MAX For further technical materials such as submittals, engineering manuals, service manuals, and catalogs, visit www.lghvac.com.
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