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Installation Manual

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

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 will explode causing severe injury or death.

Note

• Because R410A is a combination of R32 and R125, the required additional refrigerant must be charged in its liquid state. If the refrigerant is

charged in its gaseous state, its composition changes and the system will not work properly.

•

Do not heat piping more than necessary during installation. Piping will become soft and fail when pressurized.

•

Do not use any piping that has not been approved for use in high-pressure refrigerant systems. Piping wall thickness must comply with

the applicable local, state, and federal codes for the 551 psi design pressure of R410A. Inadequate piping will fail when pressurized.

R410A Refrigerant

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Содержание LCN188HV4

Страница 1: ...CEILING CASSETTE INDOOR UNIT INSTALLATION MANUAL MAX MULTI F MULTI F LCN188HV4 18 kBtu LMCN078HV 7 kBtu LCN098HV4 9 kBtu LCN128HV4 12 kBt ...

Страница 2: ...of safety precautions begins on page 3 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 Ele...

Страница 3: ... is risk of physical injury or death Dispose of the packing materials safely Packing materials such as nails and other metal or wooden parts will cause puncture wounds or other injuries Tear apart and throw away plastic packaging bags so that children will not play with them and risk suffocation and death Do not install the unit in any location exposed to open ÀDPH RU H WUHPH KHDW Do not touch the...

Страница 4: ... 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 refrigerant tubing remember to allow for pipe expansion Improper piping will cause refrigerant leaks and system malfunction RQ W VWRUH RU XVH ...

Страница 5: ...ent power OXJV QDGHTXDWH FRQQHFWLRQV ZLOO JHQHUDWH KHDW FDXVH D UH DQG SK VL cal injury or death Properly tighten all power connections RRVH ZLULQJ ZLOO RYHUKHDW DW FRQQHFWLRQ SRLQWV FDXVLQJ D UH SK VLFDO injury or death Do not change the settings of the protection devices If the protection devices have been bypassed or are forced to operate LPSURSHUO RU SDUWV RWKHU WKDQ WKRVH VSHFL HG E DUH XVHG ...

Страница 6: ...rty damage or product failure Do not allow water dirt or animals to enter the unit There is risk of unit failure 2LO VWHDP VXOIXULF VPRNH HWF FDQ VLJQL FDQWO UHGXFH WKH performance of the unit or damage its parts Use a only soft cloth to clean the air conditioner Do not use wax thinner or strong detergents Strong cleaning products will damage the surface of the air conditioner or will cause its ap...

Страница 7: ...rea 19 Hanging the Indoor Unit 20 Indoor Unit Connections 21 22 Flaring Procedure 23 24 Outdoor Unit to Indoor Unit Connections 25 29 General Installation Guidelines 30 32 Install the Condensate Drain Pipe 30 Refrigerant Piping 31 Insulating Refrigerant Piping 32 Wiring 33 44 General Guidelines 33 Power Wiring Communication Cable Connections 34 3RZHU 6XSSO 3RZHU LULQJ 6SHFL FDWLRQV 35 RPPXQLFDWLRQ...

Страница 8: ...ominal 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 078 7 000 098 9 000 128 12 000 188 18 000 L Voltage for all equipment is 2...

Страница 9: ...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 WARNING Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes PSURSHU LQVWDOODWLRQ FDQ UHVXOW LQ ...

Страница 10: ...acket One 1 Insulation for Fittings One 1 Set M4 Screws Two 2 Washers for Hanging Bracket Eight 8 Wireless Handheld Controller with Holder AKB73757604 1 One 1 Connectors included only for single zone system installations 2QH DFK IRU LQFK ĺ LQFK 2QH DFK IRU LQFK ĺ LQFK 2QH DFK IRU LQFK ĺ LQFK INTRODUCTION Table 2 Included Items 1 Wireless Handheld Controller for the four way ceiling cassette indoor...

Страница 11: ...ion potential ODP is 0 WARNING Do not place refrigerant cylinder in direct sunlight Refrigerant cylinder will explode causing severe injury or death Note Because R410A is a combination of R32 and R125 the required additional refrigerant must be charged in its liquid state If the refrigerant is charged in its gaseous state its composition changes and the system will not work properly Do not heat pi...

Страница 12: ...ht lbs 31 34 39 Grille Sold separately Shipping Weight lbs 9 Power Wiring Communications Cable No x AWG 5 4 x 14 Heat Exchanger Row x Column x Fin inch x No 1 x 8 x 18 x 1 2 x 8 x 18 x 1 2 x 10 x 18 x 1 Pipe Size Liquid in 1 4 Vapor in 3 8 1 2 Connection Size Liquid in 1 4 Vapor in 3 8 1 2 Drain O D I D in 1 1 4 1 1 Nominal capacity is rated 0 ft above sea level with corresponding refrigerant pipi...

Страница 13: ...15 2 51 64 71 2 51 64 71 4 17 32 115 7 64 3 2 3 4 70 5 29 32 150 5 29 32 150 20 23 64 517 Hanging Bolt 10 13 64 259 10 13 64 259 10 13 64 259 23 5 8 600 Ceiling Opening 20 23 64 517 Hanging Bolt 20 19 32 523 Hanging Bolt 10 13 64 259 5 19 32 142 9 19 64 236 7 61 64 202 7 61 64 202 Max Condensate Lift 31 1 2 800 or less 22 7 16 570 1 31 32 50 18 5 32 461 Hanging Bolt 1 3 16 30 63 64 25 63 64 25 7 1...

Страница 14: ... 64 3 2 3 4 70 6 3 16 157 7 9 16 192 23 5 8 600 Ceiling Opening 23 5 8 600 Ceiling Opening 20 23 64 517 Hanging Bolt 20 23 64 517 Hanging Bolt 10 13 64 259 10 13 64 259 10 13 64 259 10 13 64 259 20 19 32 523 Hanging Bolt 18 5 32 461 Hanging Bolt 22 7 16 570 22 7 16 570 5 19 32 142 1 31 32 50 1 3 16 30 63 64 25 63 64 25 7 13 64 183 1 11 32 34 3 1 2 89 6 1 16 154 24 13 32 620 14 29 32 379 Air Outlet...

Страница 15: ... Air Temperature Thermistor Evaporator Inlet Temperature Thermistor Evaporator Outlet Temperature Thermistor Table 5 Multi F Four Way Ceiling Cassette Indoor Unit Refrigerant Pipe Sizes Model No Vapor inch Liquid inch LMCN078HV Ø3 8 Ø1 4 LCN098HV4 LCN128HV4 LCN188HV4 Ø1 2 Table 6 Multi F Four Way Ceiling Cassette Indoor Unit Refrigerant Pipe Connections Description Based on Cooling Mode PCB Connec...

Страница 16: ...VSHFW RQWDFW RXU VXSHUYLVRU RQ KRZ WR SURFHHG ZLWK ILOLQJ D IUHLJKW FODLP DQG WR RUGHU D UHSODFHPHQW XQLW 7R DYRLG GDPDJLQJ WKH LQGRRU XQLW GR QRW XQSDFN WKH XQLW DQG UHPRYH WKH SURWHFWLYH PDWHULDOV XQWLO LW LV UHDG WR LQVWDOO HIRUH XQSDFN LQJ FDUHIXOO PRYH WKH SDFNDJHG XQLW WR D ZRUN DUHD QHDU WKH LQVWDOODWLRQ ORFDWLRQ Unpack and Inspect for Freight Damage 1 Before opening the shipping container ...

Страница 17: ...nit in a location where electrical noise electromagnetic waves will not impact operation Maintain proper distances between the indoor units and electric wires audio and visual appliances breaker circuit panels etc Use the provided pattern to determine the size of the ceiling opening and the hanging bolt locations required by the unit Do Not s 7KH XQLW VKRXOG QRW EH LQVWDOOHG QHDU D KHDW RU VWHDP V...

Страница 18: ...the air discharge outlet so that heated air flows in a downward direction Use a dual door system to protect the building gate or exit Figure 8 Installing Multiple Indoor Units Installing Multiple Indoor Units in One Area Ensure there is enough space between indoor units lighting fixtures and ventilation fans systems 59 1 16inches Indoor unit Lighting Ventilator Indoor unit 78 25 32 inches 118 5 32...

Страница 19: ...depict the exact dimensions necessary for the ceiling opening One is a paper template that is found in the cassette indoor unit shipping materials the other template is the cardboard on the bottom of the packaging 2 Using one of the templates choose the location for the indoor unit Mark where the four 4 suspension hanger bolts refrigerant piping and drain hose should be Suspension bolt angle must ...

Страница 20: ... temporary washer plate to more easily set up the unit suspension location 2 Ceiling height is shown on the side of the installation guide template Adjust the height of the unit accordingly Adjust the clearance before hanging the indoor unit 3 Refer to the installation guide template for the dimensions to the ceiling opening Match the center of the indoor unit labeled to the center indicated on th...

Страница 21: ...Pass the power wiring communications cable through the conduit the conduit mounting plate and to through the control panel of the indoor unit 2 Tighten the conduit and the conduit mounting plate together 3 Connect the power wiring communications cable to the indoor unit terminal block 4 Screw the conduit mounting plate to the indoor unit Figure 16 Using a Conduit I WKH GLVWDQFH EHWZHHQ WKH RXWGRRU...

Страница 22: ...oor Unit Wiring Cable Installation 8VH D OLTXLGWLJKW LQFK HOERZ FRQQHFWRU IRU ÀH LEOH FRQGXLW WR SURWHFW WKH FRPPXQLFDWLRQ FRQQHFWLRQ SRZHU FDEOH 1 Indoor unit includes a conduit bracket that can be found in the accessory kit Assemble the conduit and bracket with a grommet and washer field supplied or included with the elbow connector 2 Guide communication connection power cable insulation into th...

Страница 23: ...ipe end Compare the geometry with the figure to the right If the flare is defective cut it off and re do procedure If flare looks good blow the pipe clean with dry nitrogen 90 45 A R 0 4 0 8 Dimensions of the Flare Pipe Size in O D A Dimension mm in 1 2 1 4 5 8 3 8 3 4 Flared Connection Dimensions Tightening Torque Handle Incorrect Flare Even Length Cracked Yoke Inside is shiny with no scratches S...

Страница 24: ...four 4 turns 3 To finish tightening the flare nuts use both a torque wrench and a backup wrench 4 After all the piping has been connected and the caps have been tightened check for refrigerant gas leaks Loosening the Flare Nuts Always use two 2 wrenches to loosen the flare nuts Do not use polyolyester POE or any other type of mineral oil as a thread lubricant These lubricants are not compatible wi...

Страница 25: ... x 4 Vapor Line Connection in OD x Qty Ø3 8 x 2 Ø3 8 x 3 Ø3 8 x 4 RQQHFWLRQ VRFNHWV LQFOXGHG DV D IDFWRU VXSSOLHG DFFHVVRU ZLWK WKH LQGRRU XQLWV ZLOO QHHG WR EH XVHG ZKHQ SLSLQJ WKH LQGRRU XQLWV WR WKH RXWGRRU XQLW 6HH WDEOHV DERYH DQG EHORZ IRU LQGRRU XQLW SLSLQJ FRQQHFWLRQ DQG FRQQHFWLRQ VRFNHW GLPHQVLRQV 6HH WKH IROORZ SDJH IRU WKH FRQQHFWLRQ VRFNHW LQVWDOODWLRQ SURFHGXUH Table 10 Indoor Unit P...

Страница 26: ...edure earlier in this section Using the Connection Socket Some indoor units require the use of a connection socket when piping the indoor units to the outdoor unit See previous page for information The connection sockets are included as a factory supplied accessory with the indoor units To install 1 Align the center of the piping sections as seen in the diagrams at right and below 2 Follow the Tig...

Страница 27: ...its Branch Distribution Unit PMBD3640 A ROOM B ROOM C ROOM D ROOM A ROOM B ROOM C ROOM D ROOM Branch Distribution Unit PMBD3641 Ports A C only for 7 24 kBtu h Indoor Units Port D only for 24 or 36 kBtu h Indoor Units Branch Distribution to Indoor Unit Piping Connections Install indoor unit liquid and vapor refrigerant pipes and connection wiring to the appropri ate branch distribution ports Clearl...

Страница 28: ...below for information The connection sockets are included as a factory supplied accessory with the indoor units or in the case of the 36k indoor unit it is factory supplied with the branch distribution units To install 1 Remove any caps etc that will be on the branch distribution unit 2 Align the center of the piping sections as seen in the diagram at right 3 Tighten each piping connection individ...

Страница 29: ...onnection 2 3 8 in to 1 2 in Connection Flare side to branch distribution unit or outdoor unit Flare side to indoor unit Ø3 8 in Flare side to indoor unit Ø1 2 in Connection socket Flare nut Piping Ø3 8 in Ø3 8 in 3 1 2 in to 5 8 in Connection Ø5 8 in Connection socket Flare nut Piping Ø1 2 in 4 1 4 in to 3 8 Connection Flare side to indoor unit Ø3 8 in Connection socket Flare nut Piping Ø1 4 in F...

Страница 30: ...d g Up ed Routing mitt Routing mitt Piping Dia Inch Ø3 4 1 1 2 Ø1 1 2 2 Ø2 1 2 5 Maximum Interval feet 3 3 3 9 4 9 Figure 36 Do Not Route the Piping Upward If the field drain piping and or the common drain system is long install clamp hangers for support Table 18 Required Drain Piping Support Intervals GENERAL INSTALLATION GUIDELINES Install the Condensate Drain Pipe Figure 37 Checking the Drain S...

Страница 31: ...he outdoor unit maximum pipe temperature is 248 F and minimum pipe temperature is 40 F For field insulation of refrigerant piping between outdoor units and indoor units consider the following pipe temperature ranges for an operating heat pump system Heating mode refrigerant temperature ranges Liquid 75 118 F High Pressure Vapor 95 220 F Cooling mode refrigerant temperature ranges Liquid 75 118 F L...

Страница 32: ...n the location is air conditioned but there is severe temperature humidity difference due to high ceilings Church auditorium theater lobby etc 2 When the location is air conditioned but internal temperature humidity are high Bathroom swimming pool locker room etc 1 7KH WKLFNQHVV RI WKH DERYH LQVXODWLRQ PDWHULDO LV EDVHG RQ KHDW FRQGXFWLYLW RI WX LQ K IW2 ODVVLÀFDWLRQ 3LSLQJ 2 Air conditioned locat...

Страница 33: ...ical shock during current leakage Verify that the circuit breaker is set to OFF before installing the wiring system Electric shock can cause physical injury or death Install appropriately sized breakers fuses overcurrent protection switches and wiring in accordance with local state and NEC regulations related to electrical equipment and wiring and following the instructions in this manual Using an...

Страница 34: ...al around the terminal place the terminal screw in the ring and tighten to the terminal plate using a JIS screwdriver Firmly attach the wire secure in a way to prevent external forces from being imparted to the terminal block Use an appropriately sized JIS screwdriver for tightening the terminals Do not over tighten the connections over tightening will damage the terminals If ring terminals or for...

Страница 35: ...re is a risk of electric shock physical injury or death Provide a circuit breaker between the power source and the outdoor unit Failure to do so will cause bodily injury or death Power Supply Power Wiring Specifications Multi F and Multi F MAX with or without LGRED systems operate at 1Ø 208 230V 60Hz and power is wired to the outdoor unit only The outdoor unit will supply power to the indoor units...

Страница 36: ...conductor wire for power for each indoor unit A two 2 conductor wire for communication ground for each indoor unit Separate the power AT LEAST two 2 inches away from the communication ground wire for each indoor unit All wiring is still minimum 14 gauge stranded shielded or unshielded as cited above for each indoor unit Insulation material as required by local code Rated for continuous exposure of...

Страница 37: ...LRQ RQQHFWLRQ DEOH 6SHFL FDWLRQV Power Supply 1 L1 Power L 2 L2 Neutral N G Ground Power Flow L ĺ N Diagram is an example of communication and power cables when the wiring is GREATER THAN 130 feet Terminals may be labeled differently depending on the model Outdoor and Indoor Unit appearances may vary depending on the model Communication Flow Comm ĺ N 3 Communications GREATER THAN 130 feet Must Sep...

Страница 38: ...Button Turns the power on off 4 Jet Cool Sets the unit to super high fan speed when in cooling mode 5 Left Right Air Flow Button optional Sets the desired left right horizontal air flow direction 6 Up Down Air flow Button Stops or starts louver movement and sets the desired air flow direction to up or down 7 On Time Button Sets the time when the operation begins 8 Sleep Timer Button Sets the sleep...

Страница 39: ... indoor units use terminal block connections other indoor units use Molex connections See diagrams below for the two options Refer to the wiring diagram schematic found in the indoor unit itself or to the indoor unit wiring diagrams in the Engineering Manuals for more information NEVER splice cut or extend LG supplied cable with field provided cable Always include enough cable to cover distance be...

Страница 40: ...s Use one 1 group control cable kit for each indoor unit in the group except for the last indoor unit NEVER splice cut or extend cable length with field provided cable Cable connected to zone controller is the factory default connection Indoor unit connections depend on indoor unit type Figure 56 Example of Indoor Unit Group to Zone Controller Connections Sig 12V GND Comm Terminal Figure 57 Exampl...

Страница 41: ...overs are attached with two 2 Phillips screw head screws Terminal screws will become loose during transport Properly tighten the terminal connections during installation Wiring Cable Connections Power Wiring Wired Controller Cabl e Control Box Cover Control Box Cover Screws 1 If the decoration grille required sold separately has been installed remove it for easier access to the control box For inf...

Страница 42: ...to the control board using a cable tie Use a conduit to protect the cable refrigerant piping from the indoor unit to the outdoor unit For more information on conduits or the bundling method see the Installation section 6 Neatly arrange power wiring communications cable and secure with the appropriate cable restraint When clamping do not apply force to the wiring connections 7 Reinstall the metal c...

Страница 43: ...assette 4 way _ 19 Rubber Stopper Cable Conduit Screws Conduit Bracket Using a Conduit 1 Remove the rubber stopper on the indoor unit Pass the power wiring communications cable through the conduit the conduit mounting plate and to through the control panel of the indoor unit 2 Tighten the conduit and the conduit mounting plate together 3 Connect the power wiring communications cable to the indoor ...

Страница 44: ...er Optional Wall Mounted Controller and Sensor WIRING Assigning the Thermistor for Temperature Detection Each indoor unit includes a return air thermistor assigned to sense the temperature If a wired controller is installed there is a choice of sens ing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller It is also an option to set both thermis t...

Страница 45: ...the height by using the hanging bolts as shown 4 Attach the other two screws and then tighten all four screws until panel is secure 5 Attach the corner covers 5 6 Unscrew the two screws holding the control panel cover 6 7 Connect the one display connector CN DISP and the two vane control connectors CN VANE1 CN VANE2 of the front panel to the indoor unit PCB 7 8 Reattach the control box cover 8 Att...

Страница 46: ...ng downward on the tab at the top of the battery cover and then lift up to remove 2 Insert the two new batteries Align batteries by the and sides The interior battery compartment of the remote controller will have clear markings for the and placement 3 Verify that the batteries have clicked into the compartment and are firmly engaged with the contacts on either side of them 4 Reattach the back cov...

Страница 47: ...ring 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 2x blink LED2 1x blink Error Code Nomenclature Definitions MICOM Non volatile memory chip where unit s...

Страница 48: ... OFF 35 Low Pressure Error Pressure dropped below recommended limits 3X 5X OFF 39 Communication Error between PFC MICOM and Inverter MICOM 3X 9X OFF 40 CT Sensor Error Thermistor is disconnected or has shorted out 4X OFF 41 Inverter compressor discharge pipe D Pipe sensor is disconnected or has shorted out 4X 1X OFF 43 High pressure sensor is disconnected or has shorted out 4X 3X OFF 44 Outdoor ai...

Страница 49: ... change made requires the review of the entire tree diagram and verification that the change did not impact the size of piping segments in other parts of the system All pipe materials were properly stored capped and clean All burrs were removed after cutting and pipe ends were reamed before brazing During refrigerant pipe installation for each segment of pipe a record was made of the pipe length i...

Страница 50: ...ounded to chassis at the outdoor unit only Use a two 2 conductor wire for power use a two 2 conductor wire for communication ground Separate the power AT LEAST two 2 inches away from the communication ground wire For Multi F MAX with or without LGRED Systems All power wiring communication cable to be minimum 14 AWG from the Multi F MAX with or without LGRED outdoor unit to the BD unit stranded shi...

Страница 51: ...ette_9_15 LG Electronics U S A Inc Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta Georgia 30022 www lghvac com 20001747 ISO 9001 2008 LG ELECTRONICS INC For further technical materials such as submittals engineering manuals service manuals and catalogs visit www lghvac com ...

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