LG LSN HSV4 Series Installation Manual Download Page 9

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Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

MAX

MULTI

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.

Safety

Safety of personnel is the primary concern during all

procedures. Read and understand the safety summa-

ry at the front of this manual. Read and understand

this installation procedure before beginning instal-

lation. Use the appropriate tools and accessories

during installation. Plan your work and do not work

alone, if possible. Know how to obtain emergency

medical and fire fighting assistance.

Installation Personnel

This equipment is intended for installation by personnel trained

in the required construction, mechanical, electrical, and/or other

disciplines.

Applicable Codes

Personnel must be familiar with and follow the applicable national,

state, and/or local codes. In the event of a conflict between any

applicable code and the instructions in this manual, comply with the

applicable code.

• Connecting cable (power and control)
• Pipes - vapor line and liquid line, with

insulation

• 3/8” or 1/2” Threaded hanger rods
•

3/8” or 1/2” nuts, flat washers, and

lock/split washers

• Insulated drain hose
• Additional drain hose

•  Level
•  Screwdriver
•  Electrical lineman pliers
•  Electric drill
•  Hole saw

•  Drill
•  Flaring tool set
•  Tubing cutter
•  Tube/pipe reamer
•  Torque wrenches

•  Allen wrench
•  Gas-leak detector
•  Thermometer

WARNING

Installation work must be performed by trained personnel and in

accordance with national wiring standards and all local or other

applicable codes. Improper installation can result in fire, electric shock,

physical injury, or death.

Note:

Please read all instructions before installing this product. Become familiar

with the unit’s components and connections, and the order of installation.

Incorrect installation can degrade or prevent proper operation.

Figure 1: Typical Multi F Standard Wall-Mounted Indoor Unit

Required Tools (field provided)

Required Parts (field provided)

Summary of Contents for LSN HSV4 Series

Page 1: ...STANDARD WALL MOUNTED INDOOR UNIT INSTALLATION MANUAL MAX MULTI F MULTI F LMN077HVT 7 kBtu LSN090HSV4 9 kBtu LSN120HSV4 12 kBtu LMN157HVT 15 kBtu LSN180HSV4 18 kBtu LMN247HVT 24 kBtu ...

Page 2: ...llation For more technical materials such as submittals engineering databooks and catalogs visit www lghvac com For continual product development LG Electronics U S A Inc reserves the right to change specifications without notice LG Electronics U S A Inc This document as well as all reports illustrations data information and other materials are the property of LG Electronics U S A Inc PROPRIETARY ...

Page 3: ...n Guidelines 18 Location Selection 18 Inspection 19 Refrigerant Piping 22 Piping Materials and Handling 30 Piping Preparation 31 Piping Connections 32 IDU to ODU 32 Piping Insulation 35 Drain Piping 37 Electrical Wiring 38 Power Wiring Specifications and Best Practices 39 Power Wiring Specifications and Best Practices Controller Options 40 Indoor Unit Electrical Connections Guidelines 41 Indoor Un...

Page 4: ...s risk of physical injury or death Wear protective gloves when handling equipment Sharp edges may cause personal injury Dispose of the packing materials safely Packing materials such as nails and other metal or wooden parts may cause puncture wounds or other injuries Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death Do not insta...

Page 5: ...ine coolers or other precision air conditioning applications This equipment is designed to provide comfort cooling and heating There is risk of property damage Do not make refrigerant substitutions Use R410A only If a different refrigerant is used or air mixes with original refrigerant the unit will malfunction and become damaged Do not install the unit in a noise sensitive area When connecting re...

Page 6: ...ailure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury or death Ensure the unit is connected to a dedicated power source that provides adequate power If the power source capacity is inadequate or the electric work is not per formed properly it may result in fire electric shock physical injury or death Refer to local s...

Page 7: ... deterio rated If the base collapses the unit could fall and cause property damage or product failure Do not allow water dirt or animals to enter the unit There is risk of unit failure WARNING Do not allow water dirt or animals to enter the unit There is risk of unit failure fire electric shock physical injury or death Avoid excessive cooling and periodically perform ventilation to the unit Inadeq...

Page 8: ...oor Unit 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 MAX MULTI F MULTI F ...

Page 9: ...sonnel trained in the required construction mechanical electrical and or other disciplines Applicable Codes Personnel must be familiar with and follow the applicable national state and or local codes In the event of a conflict between any applicable code and the instructions in this manual comply with the applicable code Connecting cable power and control Pipes vapor line and liquid line with insu...

Page 10: ...minal Capacity Cooling Btu Heating Btu LMN077HVT 7 000 8 100 LSN090HSV4 9 000 10 400 LSN120HSV4 12 000 13 800 LMN157HVT 14 300 16 500 LSN180HSV4 18 000 20 800 LMN247HVT 24 000 27 000 Table 1 Multi F Standard Wall Mounted Indoor Units INTRODUCTION Part Quantity Image Installation Plate One 1 Type A Screws Five 5 Type B Screws M4 x 12L Two 2 Wireless Controller with Holder HVT AKB73635606 HSV AKB738...

Page 11: ... Mounted Indoor Unit P Art Cool Gallery Indoor Unit Nominal Capacity Nominal cooling capacity in Btu h Component AN Art Cool Wall Mounted Indoor Unit N Standard Wall Mounted Indoor Unit CN Four Way Ceiling Cassette Indoor Unit DN Ceiling Concealed Duct Low Static Indoor Unit HN Ceiling Concealed Duct High Static Indoor Unit VN Vertical Horizontal Air Handling Indoor Unit L LG 077 7 000 090 9 000 1...

Page 12: ...rant systems Piping wall thickness must comply with the applicable local state and federal codes for the 551 psi design pressure of R410A Inadequate piping may fail when pressurized Indoor units Outdoor units Model Number Indoor Unit Nominal Capacity Btu h LMU18CHV LMU24CHV LMU30CHV LMU36CHV LMU480HV LMU540HV Maximum No of Connectable Indoor Units 2 3 4 4 8 8 LMN077HVT 7 000 O O O O O O LSN090HSV4...

Page 13: ...x 12 25 32 x 9 27 32 Net Unit Weight lbs 23 20 20 23 31 32 Shipping Weight lbs 26 36 37 Power Wiring Communications Cable No x AWG 5 4 x 18 Heat Exchanger Row x Column x Fin inch x Number 2 x 16 x 23 x 1 3 x 18 x 22 x 1 Pipe Size Liquid in 1 4 Vapor in 3 8 1 2 Connection Size Liquid in 1 4 3 8 1 4 Vapor in 3 8 5 8 1 2 Drain O D I D in 27 32 5 8 1 Nominal capacity is rated 0 ft above sea level with...

Page 14: ...as pipe connection port flare connection Liquid pipe connection port flare connection Cooling Heating Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature Heat Exchanger Cross Flow Fan M Model No Vapor inch Liquid inch LMN077HVT Ø3 8 Ø1 4 LSN090HSV4 LSN120HSV4 LMN157HVT LSN180HSV4 Ø5 8 Ø3 8 LMN247HVT Ø1 2 Ø1 4 Table 5 Multi ...

Page 15: ...ulti 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 The standard wall mounted units described in this manual are one of the types of IDUs that can be connected to a Multi F Max system Example LMU540HV outdoor unit with four 4 indoor units and one 1 branch distribu tion unit connected ODU Outdoor Unit IDU In...

Page 16: ...cal Multi F MAX System with Two Branch Distribution Units Table 7 Multi F MAX Outdoor Unit Refrigerant Piping System Limitations Pipe Length ELF Equivalent Length of pipe in Feet Total piping length ΣA ΣB 475 7 feet Main pipe Outdoor Unit to Branch Distribution Units ΣA Minimum 10 feet Maximum 180 4 feet Total branch piping length ΣB 295 3 feet Branch pipe Branch Distribution Units to Indoor Units...

Page 17: ...ditional pressure losses in equivalent pipe length calculations for each elbow y branch and branch distribution unit The equivalent pipe length of each elbow Y branch and or branch distribution unit must be added to each pipe segment to ensure maximum lengths are not exceeded Using Refrigerant Components Field Supplied Refrigerant Piping Type ACR copper is the only approved refrigerant pipe materi...

Page 18: ...lfunction and or will not operate as designed if installed in any of the following conditions Do not install the unit where it will be subjected to direct thermal radiation from other heat sources Do not install the unit in an area where combustible gas may generate flow stagnate or leak Do not install the unit in a location where acidic solution and spray sulfur are often used Do not use the unit...

Page 19: ... verify the unit received is the correct unit Verify the unit capacity type and voltage Refer to the chart on Dimensions of the Flare on page 29 1 Before opening the shipping container verify you have the correct unit as described in the Note above 2 Place the box on a solid surface right side up 3 Cut the white reinforced nylon straps 4 Open the top of the box and fold back all four flaps 5 Remov...

Page 20: ...re at risk of being corroded Appropriate anti corrosion methods should be taken for the unit and all components Install Wall Mounted IDU Chassis Mounting the Installation Plate The mounting wall should be strong and solid enough to protect the unit from vibration It should securely hold the installation plate and the weight of the chassis 1 Determine the installation location 2 Refer to Figure 3 o...

Page 21: ...ing 3 16 5 16 Indoor WALL Outdoor Bushing Core Drill Sleeve Figure 6 Drilling Piping Hole Hanging the Indoor Unit Chassis 1 Attach the three 3 hooks on the top of the indoor unit to the top edge of the installation plate Verify the hooks are properly attached to the instal lation plate by gently shaking the indoor unit from side to side 2 Unlock the tubing clamp from the indoor unit frame For easi...

Page 22: ...l drywall access doors or removable ceiling panels and position the valves to face the access door or ceiling panel opening Mount valves with adequate space between them to allow for placement of adequate pipe insulation around the valves Figure 13 Installing Piping Above and Below an Obstacle Above an obstacle 3X Minimum Below an obstacle Obstacles When an obstacle such as an I beam or concrete T...

Page 23: ...ake U turns The Y branch kit must be located at least three 3 feet from the outdoor unit Provide a minimum of 20 inches between a Y branch and the branch distribution unit Figure 14 Y Branch Port Identification and Dimensions Figure 15 Y branch Horizontal Installation Alignment Multi F MAX Y Branch Kit PMBL5620 Y Branch Kit Insulation Each Y branch kit comes with clam shell type peel and stick ins...

Page 24: ...ing the piping during installation Contaminants can cause mechanical failure Selecting Field Supplied Copper Tubing Copper is the only approved refrigerant pipe material for use with Duct Free System Single Zone 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 availa...

Page 25: ...sulated in a similar fashion The natural fixed point of the pipe segment is typically where the expansion Loop or U bend should be Linear pipe expansion can be calculated using the following formula 1 In Table 15 find the row corresponding with the actual length of the straight pipe segment 2 Estimate the minimum and maximum temperature of the pipe In the column showing the minimum pipe temperatur...

Page 26: ...3 0 14 0 15 0 16 0 17 0 18 0 19 0 20 0 21 0 22 0 22 0 23 0 26 0 28 0 29 0 30 30 0 12 0 12 0 15 0 18 0 20 0 21 0 23 0 24 0 26 0 27 0 29 0 30 0 32 0 33 0 32 0 35 0 39 0 42 0 44 0 45 40 0 16 0 16 0 20 0 24 0 26 0 28 0 30 0 32 0 34 0 36 0 38 0 40 0 42 0 44 0 43 0 46 0 52 0 56 0 58 0 60 50 0 20 0 20 0 25 0 30 0 33 0 35 0 38 0 40 0 43 0 45 0 48 0 50 0 53 0 55 0 54 0 58 0 65 0 70 0 73 0 75 60 0 24 0 24 0...

Page 27: ... Max 12 Max 12 Figure 21 Typical Pipe Support Location Change in Pipe Direction Max 12 12 19 Pipe supports should never touch the pipe wall supports should be installed outside around the primary pipe insulation jacket Insulate the pipe before installing the sup ports Pipe supports are field provided and must meet local code If local codes do not specify pipe support spacing install pipe supports ...

Page 28: ...ng use a cover Sheathing Sheathing O Ring Band Lags Note Do not compress the insulation with the saddle type support If the insulation is compressed it may tear open and allow condensation to generate during product operation Welding Refrigerant Pipe Insulated Support Band Insulated Support Band Down Stop Welding Plate Nut Hexagonal Nut O ring Band Support at Intervals Between 5 and 6 3 4 Feet Fig...

Page 29: ... 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 1 minimum Note Pipe diameter plus insulation thickness determines wall penetration diameter Underground Refrigerant Piping Route refrigerant pipe installed underground inside a vapor tight pro tective sleeve to preven...

Page 30: ...l degradation Poor insulation of the compressor System does not operate properly Solutions Remove moisture from the piping Piping ends should remain capped until connections are complete Do not install piping on a rainy day Connect piping properly at the unit s side Remove caps only after the piping is cut the burrs are removed and after passing the piping through the walls Evacuate system to a mi...

Page 31: ...ance Cut the cable 4 9 ft longer than the pipe length 2A Remove the burrs Completely remove all burrs from pipe ends When removing burrs point the end of the copper pipe down to avoid introducing foreign materials in the pipe 2B Slide the flare nut onto the copper tube 3 Flaring the pipe end Use the proper size flaring tool to finish flared connections as shown Refer to the diagram in step 3 of Fi...

Page 32: ...it Indoor Unit Capacity Vapor in OD Liquid in OD A B A B 18 000 Btu h Ø3 8 Ø1 2 Ø1 2 Ø5 8 Ø1 4 Ø3 8 24 000 Btu h Ø3 8 Ø1 2 N A A B Flare to Indoor Unit Flare to Outdoor Unit Indoor Unit Capac ity Vapor Line Size in OD Liquid Line Size in OD 7 000 Btu h Ø3 8 Ø1 4 9 000 Btu h 12 000 Btu h 15 000 Btu h 18 000 Btu h Ø1 2 24 000 Btu h 1 Align the center of the piping sections and tighten the flare nut ...

Page 33: ... or ODU Flare side to branch distribution unit or ODU Multi F System Piping Connections Figure 39 Possible Outdoor Unit or Branch Distribution Unit to Indoor Unit Connections 1 When connecting the flare nuts coat the flare inside and outside with polyvinyl ether PVE refrigeration oil only 2 Align the center of the piping sections and tighten the flare nut by hand 3 Tighten the flare nut with a tor...

Page 34: ...bubbles Do not block outlet side When pressure inside pipe is above atmospheric pressure pinhole leaks can occur Refrigerant Pipe Welding Point Regulator Nitrogen gas 3 0 psi or less Nitrogen Gas Tank Brazing Note It is imperative to keep the piping system free of contaminants and debris such as copper burrs slag or carbon dust during installation 1 All joints are brazed in the field Multi V IV re...

Page 35: ...conditioned Special location when both conditions listed below are present When piping passes through an indoor area where the indoor unit does not operate When the humidity is high and there is no air flow in the location where the piping is installed Piping Insulation PIPING CONNECTIONS Connecting the Indoor Unit Piping to the Field Installed Piping Note If the drain hose is routed inside a room...

Page 36: ...surrounding insulation Protect insulation inside hangers and supports with a second insulation layer Ensure insulation on all pipe passing through pipe hangers inside conduit and or sleeves is not compressed Glue all insulation joints with no air gaps Be sure insulation material fits snugly against the refrigeration pipe with no air space between it and the pipe All pipe insulation exposed to the ...

Page 37: ...nt for drain piping should be at least 1 50 to 1 100 Ensure any holes through ceilings walls etc are large enough to accommodate both the drain piping and any insulation 1 Pour water on the indoor unit evaporator Do not use any other liquid to test the drain 2 Ensure the water flows through and out of the hose and away from the indoor unit without leaking PIPING CONNECTIONS Drain Piping Indoor uni...

Page 38: ...r and indoor unit Improperly grounded wire can cause communication problems from electrical noise and motor current leakage Ground wiring must always be installed by a trained technician If the system operates in reversed phase it may damage the com pressors and other components If there is a possibility of reversed phase phase loss momentary blackout or the power goes on and off while the system ...

Page 39: ...lti F and Multi F MAX Outdoor Units 1Ø 208 230V 60Hz 2 Indoor units Branch Distribution Units Multi F MAX systems only 1Ø 208 230V 60Hz from ODU Indoor units draw minimal power 3 Select power supply wire type and size based on NEC and local codes Maximum voltage fluctuation 10 of the nameplate rated value 4 Properly ground the outdoor unit per NEC and or local code 5 Use only copper wiring that is...

Page 40: ...ace at the outdoor unit only Note Always verify the communication cable is connected to a communications terminal on the Multi Zone unit Never apply line voltage power to the communication cable connection If contact is made the PCBs may be damaged The shield of the communications cable connecting the outdoor unit to the indoor unit should be grounded only to the outdoor unit frame Tie the shield ...

Page 41: ...ring installation 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 It is recomme...

Page 42: ...back bot tom of the indoor unit through a knockout panel Figure 57 5 Using a screwdriver connect the wires as shown in Figure 58 and Figure 59 Also refer to the appropriate wiring diagram for the IDU Figure 60 through Figure 63 Each wire should be securely attached to the terminal block Ensure the green yellow ground cable is securely connected to the correct screw terminal 6 When done reattach th...

Page 43: ...inal Connections LMN247HVT Figure 62 Indoor Unit to Outdoor Unit Branch Distribution Unit Terminal Connections LSN090HSV4 and LSN120HSV4 Figure 63 Indoor Unit to Outdoor Unit Branch Distribution Unit Terminal Connections LSN180HSV4 Indoor Unit Terminal Block GND Outdoor Unit Terminal Block or Branch Distribution Unit Terminal Block Multi F MAX Systems Only GND GRN YLW BR BL RD 3 or S 3 C 2 L2 1 L1...

Page 44: ...perature Inverter compressor discharge tempera ture Front outdoor coil pipe temperature Back outdoor coil pipe temperature Liquid line pipe temperature Subcooler inlet temperature Subcooler outlet temperature Average indoor unit IDU pipe temperature Inverter compres sor operation indicator light Liquid injection valves operation indicator lights Hot gas bypass valve operation indicator light Four ...

Page 45: ... USB to RS 485 connector kit When connected through an IDU the user will not be able to record data This software can be used to both commission new systems and troubleshoot existing systems LGMV data can be recorded to a CSV file and emailed to an LG representative to assist with diag nostic evaluations Error Codes LGMV software helps the service technician or commissioning agent to troubleshoot ...

Page 46: ...iguration used with the SIMs module and app Note The Duct Free System air conditioning system must run for at least 15 20 minutes before data collected by SIMs 2 0 is valid for troubleshooting You must have the free SIMs app correctly installed on your smart phone before using SIMs Some ODUs have an LGMV extension cable accessed by removing the side handle cover If the ODU does not have this exten...

Page 47: ...ge EEV Mode Restart Timer Comp Mode EEV Indoor Info Tab Displays the following information Frequency Operation THM Mode REM Mode FAN EEV Air Temp Pipe in Pipe mid Pipe out Graph Info Tab This tab has three sub sections IDU Indoor Unit Temperature graph Displays IDU information in graph format Information displayed is for the IDU selected on the Main screen ODU Outdoor Unit Temperature and Frequenc...

Page 48: ... equipment ELECTRICAL WIRING Wall Mounted Controller Installation Since the room temperature sensor is inside the remote controller the remote controller should be installed in a place away from direct sun light high humidity and direct supply of hot or cold air to maintain proper space temperature Install the remote controller about 5 ft above the floor in an area with good air circulation and an...

Page 49: ... Zone unit control board and LG Monitoring View LGMV Diagnostic Software If two or more errors occur simultaneously the lower error code number is displayed first After error is resolved the error code does not display Error Codes Decoding the Error Display The first and second number on the LED indicates error number Example 21 LED1 Green light 2x blink LED2 Red light 1x blink Error Code Nomencla...

Page 50: ... 3X 2X 40 CT Sensor Error Thermistor is disconnected or shorted out 4X 41 D Pipe Sensor INV is disconnected or shorted out 4X 1X 44 Outdoor Air Sensor is disconnected or shorted out 4X 4X 45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out 4X 5X 46 Outdoor unit suction line thermistor is disconnected or shorted out 4X 6X 48 Outdoor unit coil outlet liquid line thermi...

Page 51: ...ation limit for the application If the refrigerant leaks and safety limits are exceeded it could result in personal injuries or death from oxygen depletion 1 American Society of Heating Refrigeration and Air Conditioning Engi neers Inc ASHRAE Atlanta GA ASHRAE Inc Information about ASHRAE Standard 15 2010 34 2010 and addenda current as of the date of this publication Take appropriate actions at th...

Page 52: ...eparately Insulation butts up against the walls of the indoor units No gaps or cracks Insulation was not compressed at clamps and hangers Brazing Practices Description Check Medical grade there are 4 available dry nitrogen for purging during brazing was used constant 3 psi while brazing Installation For more information on any procedure refer to the detail provided in the installation section Refr...

Page 53: ...de requirements LG supplied cable was used between the indoor unit and its zone controller No cables were spliced and no wire caps are present Communication type RS 485 BUS type All communications cables were a minimum of 18 AWG four 4 conductor shielded and stranded with insulation material per local code Cable segment shields were tied together Used appropriate crimping tool to attach ring or sp...

Page 54: ...door Unit 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 MAX MULTI F MULTI F ...

Page 55: ...MAX MULTI F MULTI F Who to call for assistance Freight Damage and Unit Replacements Your LG Manufacturer Representative Missing Parts Your LG Manufacturer Representative Freight Damage and Unit Replacements Your LG Manufacturer Representative Received Wrong Indoor Unit Model Your LG Manufacturer Representative Installation Startup and Commissioning Technical Assistance 1 888 865 3026 For warranty ...

Page 56: ...mercial Air Conditioning Division 11405 Old Roswell Road Alpharetta Georgia 30009 www lghvac com LG Customer Information Center Commercial Products 1 888 865 3026 USA Follow the prompts for commercial A C products and parts 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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