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12

MUL

TI V S System 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.

Outdoor Unit Service Access and Allowable Clearances

Proper airflow through the outdoor unit coil is critical for proper unit operation. Figures below and on the next page illustrate clearance re-

TXLUHPHQWVIRUYDULRXVLQVWDOODWLRQVFHQDULRVIRUWKH0XOWL96RXWGRRUXQLW8VHWKHKRWLVOHFROGLVOHDSSURDFKZKHQSODFLQJPXOWLSOHXQLWVLQ

close proximity to each other.  Outdoor unit fans draw air from the back of the unit and discharges out the front. Place units back to back and 
face to face.    

Legend

LR = Rear wall height
LF = Front wall height
H = Unit height 

• Installation clearances must comply with local building codes.
• All figures not to scale. 
• Never place multiple units facing back to front or front to back as shown immediately below here or high 

and low system pressure problems may occur.

Min. 4"

Min. 20"

LF  

”

 H

Min. 40"

LR < H

Max. 20"

LR

H

Min. 10"

Min. 40

"

Single Unit—High Front Wall with Building Overhang 
and No Side Walls

Single Unit—High Rear Wall and Low Front Wall
with No Side Walls

Airfl

ow

Airfl

ow

LF

 H

Min. 4"

Min. 4"

Min. 4"

Min. 4"

Min. 20"

Min. 4"

Min. 8"

Min. 40"

Min. 12"

Min. 6"

Min. 6"

Max. 20"

Min. 40"

Min. 40"

Min. 4"

Min. 20"

Max. 20"

Max. 20"

Min 40"

Min. 20"

Single Unit—High Rear Wall with or 
without High Side Walls

Single Unit—High Rear and Front Walls with 
No Side Walls

Side by Side—High Rear and Side Walls

Single Unit—High Rear and Side Walls with 
Building Overhang

Single Unit—High Front and Rear Walls with 
Building Overhang and No Side Walls 

Single Unit—High Rear Wall and Low Front Wall 
with Building Overhang and No Side Walls

Airfl

ow

Airfl

ow

Airfl

ow

Airfl

ow

Airfl

ow

Airfl

ow

LF  

•

 H

LF

 H

Min. 4"

LF  

”

 H

LF  

 H

Airflow

Airflow

Figure 3: Improper Outdoor Unit Placement.

Figure 4: Proper Outdoor Unit Placement and Clearances.

Figure 5: Proper Outdoor Unit Placement and Clearances, continued.

Service Access and Allowable Clearances for Outdoor Unit

GENERAL INSTALLATION GUIDELINES

Summary of Contents for MULTI V S ARUN038GSS4

Page 1: ...INSTALLATION MANUAL Variable Refrigerant Flow Outdoor Units 3 0 4 0 and 4 4 Tons ...

Page 2: ...tals catalogs engineering installation owner s and service manuals visit www lghvac com Do not throw away destroy or lose this manual Please read carefully and store in a safe place for future reference Content familiarity required for proper installation The instructions included in this manual must be followed to prevent product malfunction property damage injury or death to the user or other pe...

Page 3: ...tem refrigerant leaks after the unit has been installed or serviced SRVXUH WR KLJK FRQFHQWUDWLRQ OHYHOV RI UHIULJHUDQW JDV PD OHDG WR illness or death Periodically check that the outdoor frame is not damaged 7KHUH LV D ULVN RI H SORVLRQ SK VLFDO LQMXU RU GHDWK If the air conditioner is installed in a small space take measures to prevent the refrigerant concentration from exceeding safety limits in...

Page 4: ...prevent sweating Cold surfaces such as uninsulated piping can generate condensate that may drip and cause water damage to walls Always check for system refrigerant leaks after the unit has been installed or serviced RZ UHIULJHUDQW OHYHOV PD FDXVH SURGXFW IDLOXUH Do not make refrigerant substitutions Use R410A only I D GLIIHUHQW UHIULJHUDQW LV XVHG RU DLU PL HV ZLWK RULJLQDO UHIULJHUDQW WKH unit wi...

Page 5: ...HUDWH KHDW FDXVH D UH DQG physical injury or death Ensure the system 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 IRUPHG SURSHUO LW PD UHVXOW LQ UH HOHFWULF VKRFN SK VLFDO LQMXU RU GHDWK Properly tighten all power connections RRVH ZLULQJ PD RYHUKHDW DW FRQQHFWLRQ SRLQWV FDXVLQJ D UH SK VLFDO injury ...

Page 6: ...enclosed low lying or poorly ventilated area DQG WKH V VWHP GHYHORSV D UHIULJHUDQW OHDN LW PD FDXVH D UH HOHFWULF VKRFN H SORVLRQ SK VLFDO LQMXU RU GHDWK WARNING To avoid physical injury use caution when cleaning or servicing the air conditioner CAUTION OHDQ XS WKH VLWH DIWHU VHUYLFLQJ LV QLVKHG DQG FKHFN WKDW no metal scraps screws or bits of wiring have been left inside or surrounding the unit D...

Page 7: ...tion for Installation 15 Piping Preparation 16 46 Piping Materials and Handling 16 26 Outdoor Unit Connections 27 28 5HIULJHUDQW 3LSLQJ 6 VWHP DPSOHV 29 33 5HTXLUHG 76 LOH 34 FFHSWDEOH 3LSLQJ D RXWV 35 Branch Pipe Fittings 36 37 Vacuum Mode 38 Vacuum Procedure 39 HDN 7HVW 40 Refrigerant Charge 41 42 Refrigerant Piping Insulation 43 46 Electrical Wiring 47 63 HQHUDO LULQJ XLGHOLQHV 47 Outdoor Unit ...

Page 8: ...HFL FDWLRQV 1 Nominal capacity applied with non ducted indoor units and is rated 0 ft above sea level with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units All capacities are net with a Combination Ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor...

Page 9: ... ODP is 0 WARNING R QRW SODFH UHIULJHUDQW F OLQGHU LQ GLUHFW VXQOLJKW 5HIULJHUDQW F OLQGHU PD H SORGH FDXVLQJ VHYHUH LQMXU RU GHDWK 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 necessa...

Page 10: ... lying area where water could accumulate Install a fence to prevent animals and unauthorized personnel from accessing the outdoor unit Where it will not be subjected to direct thermal radiation from other heat sources nor an area that would not expose the outdoor unit to heat or steam like discharge from boiler stacks chimneys steam relief ports other air conditioning units kitchen vents plumbing ...

Page 11: ...it may be damaged from a lightening strike Inform the customer of this possibility in advance Rooftop Installations If the outdoor unit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method are adequate for the unit location Consult local codes regarding rooftop mounting Dealing with Snow and Ice In climates that experience snow buildup place the...

Page 12: ...o back as shown immediately below here or high and low system pressure problems may occur Min 4 Min 20 LF H Min 40 LR H Max 20 LR H Min 10 Min 40 Single Unit High Front Wall with Building Overhang and No Side Walls Single Unit High Rear Wall and Low Front Wall with No Side Walls Airflow Airflow LF H Min 4 Min 4 Min 4 Min 4 Min 20 Min 4 Min 8 Min 40 Min 12 Min 6 Min 6 Max 20 Min 40 Min 40 Min 4 Min...

Page 13: ...h Rear Wall and Low Front Wall with No Side Walls or Overhang Side by Side High Front Wall with Building Overhang and No Side or Rear Walls Side by Side High Rear Wall and Low Front Wall with No Side Walls Double Row Units Low Rear and Front Walls with No Side Walls or Overhang Side by Side High Front and Rear Walls with No Side Walls Side by Side High Rear Wall and Low Front Wall with Building Ov...

Page 14: ...t may result in an accident that causes physical injury or death Do not drop the unit when carrying it with a forklift It may result in an accident that causes physical injury or death Use a minimum of three 3 lifting straps of at least 26 1 4 feet long If unit is not supported correctly it may result in an accident that causes physical injury or death Always know where the unit s center of gravit...

Page 15: ...ELINES I Beams can be used as a base support Operation sound and vibration from the outdoor units may transfer to surrounding floors or walls to reduce vibration and operation sound add anti vibration materials to the concrete base Ensure there is enough room under the outdoor unit if installing the piping and wiring using the bottom access holes The corners of the outdoor unit must be attached fi...

Page 16: ...2B 3 4 3 Flaring the pipe end Use the proper size flaring tool to finish flared connections as shown ALWAYS create a 45 flare when working with R410A Firmly hold copper tube in a bar with a dimension as indicated in the table below 4 Carefully inspect the flared pipe end Compare the geometry with the figures and dimensions as detailed If the flare is defective cut it off and re do procedure If fla...

Page 17: ...at a minimum pressure of three 3 psig and maintain a steady flow Blow clean all pipe sections with dry nitrogen prior to assembly Use a tubing cutter De burr and clean all cuts before assembly Store pipe stock in a dry place Keep pipe capped and clean Use adapters to assemble different sizes of pipe Use a 15 silver phosphorous copper brazing alloy to avoid overheating and produce good flow Protect...

Page 18: ...ap on the piping when passing it through walls etc Test system for air tightness Perform brazing procedures that comply with all applicable standards Perform flaring procedures that comply with all applicable standards Perform flanging procedures that comply with all applicable standards Ensure that refrigerant lines are pressure tested to 550 psig Moisture Dust Leaks Table 9 Three Principles of R...

Page 19: ...EULFDWHG 7HH V WWLQJV HDGHUV RU RWKHU EUDQFK WWLQJV DUH QRW TXDOL HG IRU XVH ZLWK 0XOWL 9 6 V VWHPV 7KH RQO HOG SURYLGHG WWLQJV DOORZHG LQ a Multi V S piping system are 45 and 90 elbows Table 11 Y Branches and Headers Y branch Kit Model No Headers 4 branch 7 branch ARBLN01621 ARBL054 ARBL057 ARBLN03321 ARBL104 ARBL107 If the diameter of the branch pipe segments differ from that of the designated r...

Page 20: ...eered devices designed to evenly divide the flow of refrig erant and are used to join one pipe segment to two or more segments Header kits are intended for use where multiple indoor units are in the same vicinity and it would be better to home run the run out pipes back to a centralized location If connecting multiple indoor units that are far apart Y branches may be more economical LG Header Kits...

Page 21: ...can be calculated using the following formula 1 From Table 12 find the row corresponding with the actual length of the straight pipe segment 2 Estimate the minimum and maximum temperature of the pipe typical pipe temperature change range High Pressure Vapor ambient temperature to 215 F Low Pressure Vapor ambient to 35 F Liquid pipe ambient 80 F 110 F Choose the two most extreme In the column showi...

Page 22: ... 1 51 1 61 1 82 1 96 2 03 2 10 160 0 64 0 64 0 80 0 96 1 04 1 12 1 20 1 28 1 36 1 44 1 52 1 60 1 68 1 76 1 73 1 84 2 08 2 24 2 32 2 40 180 0 72 0 72 0 90 1 08 1 17 1 26 1 35 1 44 1 53 1 62 1 71 1 80 1 89 1 98 1 94 2 07 2 34 2 52 2 61 2 70 200 0 80 0 80 1 00 1 20 1 30 1 40 1 50 1 60 1 70 1 80 1 90 2 00 2 10 2 20 2 16 2 30 2 60 2 80 2 90 3 00 220 0 88 0 88 1 10 1 32 1 43 1 54 1 65 1 76 1 87 1 98 2 0...

Page 23: ... 26 29 L2 86 99 111 131 149 165 179 3 R1 15 17 19 23 26 29 31 L2 94 109 122 143 163 180 196 R1 16 19 21 25 28 31 34 L2 102 117 131 155 176 195 212 4 R1 17 20 22 26 30 33 36 L2 109 126 140 166 188 208 226 1 R Centerline Length of Pipe 2 HQWHUOLQH 0LQLPXP 5DGLXV LQFKHV Figure 27 Coiled Expansion Loops and Offsets Plan View Table 13 Radii of Coiled Expansion Loops and Developed Lengths of Expansion O...

Page 24: ...lation valves does not automatically void any LG product warranty however a limited warranty may be voided in whole or part should any field supplied accessory fail in any way that causes product failure In line Refrigeration Components Components such as oil traps solenoid valves filter dryers sight glasses tee fittings and other after market accessories are not permitted RQ WKH UHIULJHUDQW SLSLQ...

Page 25: ...suspended from the ceiling on all thread rods fiber straps or split ring hangers can be used as long as they do not compress the pipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of the primary insulation within the confines of the support pipe clamp A properly installed pipe system will have sufficient supports to avoid pipes fro...

Page 26: ...ver Sheathing Sheathing O Ring Band Lags 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 Figure 36 Saddle Ty...

Page 27: ...les Insects or small animals entering the outdoor unit may cause a short FLUFXLW LQ WKH HOHFWULFDO ER ZKLFK PD OHDG WR UH HOHFWULF VKRFN physical injury or death Insects or small animals entering the outdoor unit may cause a short FLUFXLW LQ WKH HOHFWULFDO ER ZKLFK PD OHDG WR XQLW IDLOXUH WARNING If piping from the left right or bottom use the access holes on the base pan Do not damage the piping ...

Page 28: ...the liquid and vapor piping are locked 2 Extract any remaining refrigerant or air inside through the service port 3 Remove the leak prevention cap Figure 31 Removing the Leak Prevention Cap Shut Off 9DOYH Size LQFK 7LJKWHQLQJ 7RUTXH OEV IW 7XUQ ORFNZLVH WR ORVH 6KDIW 9DOYH RG Cap Service Port ODUH 1XW 9DSRU 3LSLQJ Connected to Unit Closed Opened H DJRQDO Ø1 4 4 4 0 4 3 7 0 4 0 16 in 13 0 1 5 12 7 ...

Page 29: ...OHQJWK Values calculated based on formula and factors from www sporlanonline com VXSSOLHG UDQFK DQG HDGHU WWLQJV PXVW EH XVHG LHOG EXLOW UDQFK DQG HDGHU WWLQJV DUH QRW SHUPLWWHG Pipe Length Longest total 984 ELF Longest distance from ODU to IDU 492 feet Actual 574 feet Equivalent Distance Between Fittings and IDUs 0LQLPXP GLVWDQFH EHWZHHQ IDU to any Y Branch 0D LPXP GLVWDQFH EHWZHHQ first Y Branch...

Page 30: ...UHSRUW See pages 31 33 for refrigerant pipe diameter and pipe length tables Ɛ 131 feet Elevation1 164 feet Elevation2 49 feet Length 492 feet Multi V S Unit IDU IDU IDU IDU IDU D Y branch To Multi V S Outdoor Unit To Indoor Units DPSOH 6L LQGRRU XQLWV FRQQHFWHG 0XOWL 9 6 2XWGRRU 8QLW IDU Indoor Units Header 0DLQ 3LSH IURP 0XOWL 9 6 2XWGRRU 8QLW WR HDGHU C Header to Indoor Unit D To Farthest Indoor...

Page 31: ...PING CONNECTIONS 5HIULJHUDQW 3LSLQJ 6 VWHP DPSOHV The following is an example of manual pipe size calculations Designers are highly encouraged to use LATS instead of manual calculations 1 For calculation purposes assume equivalent pipe length of Y branch is 1 6 feet and equivalent pipe length of header is 3 3 feet Length Total pipe length Longest actual pipe length Equivalent pipe length1 Ȉ Ȉ IHHW...

Page 32: ...KH 76 0XOWL 9 VRIWZDUH report 0XOWL 9 6 2XWGRRU 8QLW DSDFLW WRQ LTXLG SLSH LQFKHV 2 9DSRU SLSH LQFKHV 2 3 0 Ø3 8 Ø5 8 4 0 Ø3 8 Ø5 8 4 4 Ø3 8 Ø3 4 RZQVWUHDP 7RWDO DSDFLW RI 8V WX K 1 LTXLG SLSH LQFKHV 2 9DSRU SLSH LQFKHV 2 Ø1 4 Ø1 2 Ø3 8 Ø5 8 Ø3 8 Ø3 4 Table 20 6L H RI 0DLQ 3LSH URP 6SDFH 8QLW WR EUDQFKHV Indoor Unit Capacity1 LTXLG SLSH LQFKHV 2 9DSRU SLSH LQFKHV 2 1 4Ø 1 2Ø 3 8Ø 5 8Ø 3 8Ø 3 4Ø 1 ...

Page 33: ...ing 8 5 MBh Recessed Ceiling 4 Way Cassette Cooling 7 5 MBh Heating 8 5 MBh Cased Floor Mount 4 Way Cassette Cooling 7 5 MBh Heating 8 5 MBh Cased Floor Mount 4 Way Cassette Cooling 7 5 MBh Heating 8 5 MBh Recessed Ceiling Low Static Cooling 7 5 MBh Heating 8 5 MBh Recessed Ceiling 4 Way Cassette Cooling 7 5 MBh Heating 8 5 MBh Wall Mounted Cooling 7 5 MBh Heating 8 5 MBh Multi V S ARUN048GSS4 Coo...

Page 34: ...djusting LATS Multi V S Output for Altitude When a system is installed at elevations significantly above sea level consider the impact air density has on the capacity of the indoor and air source units LATS does not de rate indoor unit capacity for high altitude applications Be sure to apply locally accepted correction factors when calculating actual indoor unit capacities at that altitude Design ...

Page 35: ...fication LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 9DULRXV FFHSWDEOH D RXWV REFRIGERANT PIPING CONNECTIONS Acceptable Piping Layouts Header First Second First Second First Main Pipe Distribution Second Main Pipe Distribution First Second Third Main Pipe Distribution ...

Page 36: ...ranches should be insulated with the clam shell jacket included in each kit Install the branch pipe between the outdoor units so that the outlet pipe is parallel with the surface A B To Multi V S outdoor unit To branch piping or indoor unit A B Viewed from point A in direction of arrow Within 5º Facing up Facing down Within 3 Within 3 Blow nitrogen while brazing Do not cut this pipe shorter than 2...

Page 37: ...ed Pipe Horizontal Plane Viewed from this point in the direction of the arrow Unit Inch 4 branch ARBL054 7 branch ARBL057 4 branch ARBL104 7 branch ARBL107 Models Vapor pipe Liquid pipe 14 3 16 21 1 4 21 1 4 4 3 4 I D 5 8 I D 1 2 I D 1 2 I D 5 8 I D 5 8 I D 3 4 4 3 4 14 3 16 I D 3 8 I D 3 8 I D 1 4 I D 1 4 I D 3 8 I D 1 2 5 15 16 5 15 16 5 15 16 5 15 16 5 15 16 15 3 4 6 5 16 I D 5 8 I D 1 2 I D 3 ...

Page 38: ...ing the Ɣ button Start the vacuum mode VACC Outdoor Unit valves and EEV should be open Indoor Units EEVs should be open 9DFXXP 0RGH 2Q Figure 39 0XOWL 9 6 2XWGRRU 8QLW 3 6ZLWFK 9DFXXP 0RGH 6HWWLQJ DQG PCB Location 9DFXXP 0RGH 2II Set DIP Switch No 5 to Off and push the reset button on the Outdoor Unit PCB All valves in the indoor and outdoor units will be opened when the Vacuum Mode is set Outdoor...

Page 39: ...e vacuum pump for one 1 hour to 500 microns vacuum drying 4 If the system cannot be evacuated to 500 microns repeat the steps of vacuum break and drying 5 Finally after maintaining the system in vacuum for one 1 hour check if the vacuum gauge rises or not Figure 40 Vacuum Procedure Diagram If the primary refrigerant charge is not performed in a reasonable time after the vacuum procedure is complet...

Page 40: ...ring the refrigerant system in a liquid state the top of the cylinder must be higher than its bottom when the system is pressurized The cylinder should be used in a vertical standing position Leak Test Ambient Temperature Correction If the ambient temperature changed between the time when pressure was applied and when the pressure drop was checked adjust results by factoring in approximately 1 5 p...

Page 41: ...O 0RXQWHG UW RRO 0LUURU SB SE 5k to 15k 0 53 10 DOO 0RXQWHG UW RRO 0LUURU SC 18k to 24k 0 62 11 DOO 0RXQWHG SV 30k to 36k 1 01 12 1 Way Cassette TU 7k to 12k 0 44 13 1 Way Cassette TT 18k to 24k 0 64 14 2 Way Cassette TL 18k to 24k 0 35 15 4 Way 2 x 2 Cassette TR 5k to 7k 0 40 16 4 Way 2 x 2 Cassette TR 9k to 12k 0 55 17 4 Way 2 x 2 Cassette TQ 15k to 18k 0 71 18 D DVVHWWH TNA 7k to 24k 0 89 19 4 ...

Page 42: ...Refrigerant Charge Calculating the additional refrigerant charge must also take into account piping length GGLWLRQDO 5HIULJHUDQW KDUJH RUPXOD 0XOWL 9 6 2XWGRRU 8QLW DFWRU 5HIULJHUDQW KDUJH OEV GGLWLRQDO KDUJH OEV 7RWDO GGLWLRQDO 5HIULJHUDQW PRXQW OEV Where Additional Charge lbs Total liquid piping length feet 7 8 inches x 0 238 lbs ft Total liquid piping length feet 3 4 inches x 0 179 lbs ft Total...

Page 43: ...r units must be insulated correctly for safety and usage Y branch connections Head ers refrigerant piping field provided isolation ball valves if present service valves and elbows must be properly and completely insulated using closed cell pipe insulation up to the indoor unit piping connections To prevent heat loss heat gain through the refrigerant piping all UHIULJHUDQW SLSLQJ LQFOXGLQJ OLTXLG O...

Page 44: ...ity level ODVVLÀFDWLRQ 3LSLQJ 2 Air conditioned location Non air conditioned location 1 Typical Conditioned Location 2 Special Conditioned Location 3 Typical Unconditioned Location 4 Special Unconditioned Location Liquid pipe ø1 4 inches 1 2 inches 1 2 inches 1 2 inches 1 2 inches ø3 8 inches LQFKHV 1 2 inches 1 2 inches 1 2 inches 1 2 inches 9DSRU SLSH ø3 8 inches 1 2 inches 3 4 inches 3 4 inches...

Page 45: ...ickness 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 Diameter of penetrations shall be determined by pipe diameter plus the thickness of the insulation OO ÀRRU DQG ZDOO SHQHWUDWLRQV VKRXOG EH SURSHUO VL HG DQG ODUJH HQRXJK WR DFFRPPRGDWH SLSH GLDPHWHU SOXV LQVXODWLRQ WKLFNQHVV Underground Refrigerant Piping Refrigerant...

Page 46: ...nches and Headers May be Required in Humid Environments I WKH V VWHP KDV EHHQ RSHUDWLQJ IRU D ORQJ WLPH LQ D KLJK KXPLGLW HQYLURQPHQW GHZ SRLQW WHPSHUDWXUH PRUH WKDQ FRQGHQVDWH is likely to form If this happens install 3 8 inch thick ethylene propylene diene methylene EPDM insulation that is plenum rated with a heat resistance factor of more than 248 F Applying Insulation to Y Branch and Header Fi...

Page 47: ...munication problems from electrical noise and motor current leak DJH URXQG ZLULQJ PXVW DOZD V EH LQVWDOOHG E D TXDOLILHG WHFKQLFLDQ If the system operates in reversed phase it may damage the compressors 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 is operating install a field supplied phase loss protect...

Page 48: ...DQG WKH 3 3 Outdoor unit terminal block is located immediately below the control box 4 Connect the indoor unit to outdoor unit communication cables to the correct terminals on the outdoor unit terminal block 5 When connecting the indoor unit to outdoor unit communication cable with a shielded cable connect the ground wire to the outdoor unit ground terminal only Indoor Communications PCB Main PCB ...

Page 49: ...s must not be routed in the same conduit and must be routed in a manner that keeps them a minimum of two 2 inches apart Connect outdoor unit terminal IDU A to the odd numbered indoor unit terminal Terminal A on the indoor units may be tagged 3 A or 5 A Connect outdoor unit terminal IDU B to indoor unit termi nal B Terminal B on the indoor units may be tagged 3 B or 5 B 0D LPXP DOORZHG OHQJWK RI LQ...

Page 50: ...s per National Electrical Code and local codes For power to the outdoor units use copper wiring that is solid or stranded and shielded with the wires separately insulated URXQG ZLUH VKRXOG EH ORQJHU WKDQ WKH FRPPRQ SRZHU FRPPXQLFDWLRQ ZLUHV Connect the wiring firmly so the wires cannot be easily pulled out Refer to the inside of the chassis cover for circuit and terminal block diagrams for your mo...

Page 51: ... code 5DWHG IRU FRQWLQXRXV H SRVXUH RI WHPSHUDWXUHV XS WR 0D LPXP DOORZDEOH FDEOH OHQJWK IHHW Ring and spade terminals used to connect communications cables MUST be copper bearing Do NOT use terminals that are galvanized or nickel plate over steel LUPO DWWDFK WKH FDEOH SURYLGH VODFN EXW VHFXUH LQ D ZD WR SUHYHQW H WHUQDO IRUFHV IURP EHLQJ LPSDUWHG RQ WKH WHUPLQDO EORFN Communications cable connect...

Page 52: ...roducts ACPs BACnet and LonWorks gateways and energy recovery ventilators all on the same cable Order does not matter Polarity does Keep A terminals with A terminals and B terminals with B terminals Starting at the outdoor unit terminate the cable on terminals Internet A and Internet B Route the cable as needed between each device CN REMO On All Indoor Unit Styles R D B K Y L LG Supplied Front CN ...

Page 53: ...1RPLQDO DSDFLW Table 33 LVSOD RGH H QLWLRQV 9ROWDJH 6HH WDEOHV DERYH IRU FRGH GH QLWLRQV 8VLQJ WKH QLWLDO LVSOD 1 Power all indoor units 2 Verify the outdoor units to indoor units communications cable is installed and terminated correctly Inspect terminals on the outdoor unit 3 Verify that DIP switches were properly adjusted for the jobsite configuration 4 Power the outdoor unit 5 After power is p...

Page 54: ...ay found on the outdoor units PCB Each code will display for two 2 seconds 8 Know how many indoor units are connected to the system Do not change any DIP switch settings during the pre commissioning process All DIP switches should be left in the OFF position Disconnects should only be operated by a properly licensed electrician at this time Never look at a disconnect switch when closing Turn DZD I...

Page 55: ... FRPSUHVVRUV RU XQWLO GLUHFWHG E WKH RPPLVVLRQLQJ JHQW 7KHUH LV D ULVN RI H SORVLRQ VXIIRFDWLRQ SK VLFDO LQMXU and or death Initiate the Auto Addressing Procedure continued 12 Upon successful completion of the auto address procedure record the system address assigned to each indoor unit by the auto address procedure in the column provided on the Pre commissioning Device Configuration Worksheet 13 ...

Page 56: ...installed number of indoor units if the auto addressing procedure was successful 6 Upon completion of the auto addressing routine the display will be blank and the system will be in standby waiting for another command 7 Record the system address the outdoor unit assigned to each indoor unit by the auto address procedure in the column provided on the Pre commissioning Device Configuration Worksheet...

Page 57: ...group on the Pre commissioning Device Configuration Worksheet 3 Termination Procedure 6WDUWLQJ ZLWK WKH 0DVWHU LQGRRU XQLW SOXJ LQ WKH PDOH HQG RI WKH SLJWDLO FDEOH LQWR WKH 1 5 02 VRFNHW W WKH ODVW 6ODYH LQGRRU XQLW LQ the group a pigtail cable is not required Plug the male end of the extension cable coming from the previous indoor unit into the 1 5 02 VRFNHW Plug the Y cable into the pigtail at ...

Page 58: ...n Limitations Central Controller Communications Limitations Each type of Central Controller device is designed to communicate with a limited quantity of indoor units The quantity of indoor units that can be connected to a single central control communications cable therefore will be defined by the central control device on that FDEOH ZLWK WKH VPDOOHVW 0D LPXP QGRRU 8QLW 4XDQWLW DV VKRZQ HQWUDO RQW...

Page 59: ...l extension cable between the indoor units is plugged into the Y cable unplug the extension cable from the Y cable 5 If not already present plug the zone controller communications cable into the pigtail cable 6 8VLQJ WKH FRQWUROOHU JR WR WKH VHWXS IXQFWLRQ LFRQV DUH GLIIHUHQW IRU HDFK FRQWUROOHU 5HIHU WR WKH FRQWUROOHU XVHU V PDQXDO IRU PRUH LQIRUPDWLRQ 7 SH LQ WKH HQWUDO RQWURO DGGUHVV GHVLJQDWHG...

Page 60: ...t Value Blank Saved in 3520 Snow Removal and Rapid Defrost Fn6 oFF op1 op3 Selected the Option Change the Set Value Blank Saved in 3520 Adjusting Target Pressure Fn8 oFF op1 op3 Selected the Option Change the Set Value Blank Saved in 3520 Function sets are saved in the EPROM even if system power is reset 1R RQ 3 6ZLWFK 6 FDQ EH 2 H FHSW ZKHQ LQVWDOOLQJ D V VWHP WKDW KDV DOO HQHUDWLRQ VHULHV LQGRRU...

Page 61: ...on Table 40 0D LPXP DQ 530 RU DFK 6WHS 1LJKW RZ 6RXQG XQFWLRQ In cooling mode at night when the cooling load is reduced Night Low Sound function is used to adjust outdoor unit fan operation to a ORZHU 530 UHGXFHV VRXQG Step Judgment Time RXU Operation Time RXU op1 8 9 op2 6 5 10 5 op3 5 12 op4 8 9 op5 6 5 10 5 op6 5 12 op7 8 9 op8 6 5 10 5 op9 5 12 op10 Continuous Operation op11 Continuous Operati...

Page 62: ... Ɣ button A trained technician must set the functions A central controller must first be installed before the outdoor unit address can be set 6QRZ 5HPRYDO DQG 5DSLG HIURVW XQFWLRQV Set Outdoor Unit PCB DIP Switch No 5 to ON 6HOHFW WKH PRGH XVLQJ WKH ŹDQG Ż EXWWRQV Choose Func by pushing the Ɣ button 0RGH LV VHW 6HOHFW WKH IXQFWLRQ XVLQJ WKH ŹDQG Ż EXWWRQV Choose Fn6 by pushing the Ɣ button 6HOHFW ...

Page 63: ...RQV Choose Heat or Cool by pushing the Ɣ button 6HOHFW WKH RSWLRQ XVLQJ WKH ŹDQG Ż EXWWRQV Choose op1 op4 by pushing the Ɣ button Mode Purpose Condensing Temperature 9DULDWLRQ Evaporating Temperature 9DULDWLRQ Heat Cool op1 Increase Capacity Increase Capacity 3 6 F 2 C 5 4 F 3 C op2 Decrease Power Consumption Increase Capacity 3 6 F 2 C 2 7 F 1 5 C op3 Decrease Power Consumption Decrease Power Con...

Page 64: ...1 OFF System will operate but WITHOUT Gen 4 features Gen 4 Gen 4 ONLY Any combination of 0RGHOV 0XVW EH 2 factory default Does NOT include Gen 4 features System will not operate if DIP Switch No 3 is ON and an error code will be generated Gen 4 Any combination of Gen 2 and Gen 4 0RGHO 21 0XVW EH 2 factory default Gen 4 Any combination of Gen 2 and Gen 4 Any combination of 0RGHOV 0XVW EH 2 factory ...

Page 65: ...ed circuit board version Software version Installer name 0RGHO QXPEHU RI 8V Site name Total number of connected IDUs Communication indicators IDU capacity IDU operating mode IDU fan speed IDU EEV position IDU room temperature IDU inlet pipe temperature IDU outlet pipe temperature IDU error code LG Monitoring View LGMV Diagnostic Software 09 VRIWZDUH 35 76 DQG 35 7 DOORZV WKH VHUYLFH WHFKQLFLDQ RU ...

Page 66: ... VRIWZDUH KHOSV WKH VHUYLFH WHFKQLFLDQ RU FRPPLVVLRQLQJ DJHQW to troubleshoot system operation issues by displaying malfunction codes Figure 73 These error codes can be seen on the main VFUHHQ RI WKH 09 VRIWZDUH SURJUDP RU DQ RYHUYLHZ RI 0XOWL 9 6 system error codes see Error Codes section For detailed informa WLRQ RQ KRZ WR WURXEOHVKRRW LQGLYLGXDO HUURU FRGHV VHH WKH 0XOWL 9 6 6HUYLFH 0DQXDO Figu...

Page 67: ...on error Indoor unit inlet pipe temperature sensor has disconnected or short circuited Check the connection at the CN PIPE IN socket on the indoor unit PCB then check the thermistor 0 3 Communication error between zone controller and indoor unit Indoor unit PCB has not received communications signal from zone controller 0 4 Indoor unit drain pump error Drain pump and or flow switch is are malfunct...

Page 68: ...it low side pressure transducer senses pres sure below allowable limits Shutdown due to low suction pressure 3 6 1 Outdoor unit fell below low condenser compression ratio limit Outdoor unit remained below the low condenser ratio limit for three 3 minutes 4 0 1 Outdoor unit inverter compressor current transducer CT sensor error Outdoor unit inverter compressor current transducer CT detec tion senso...

Page 69: ...XWGRRU XQLW LV UHVWULFWHG 7 5 1 0DVWHU RXWGRRU XQLW IDQ 7 VHQVRU HUURU Disconnection or short circuit of outdoor unit fan current detec tion CT sensor 7 6 1 Outdoor unit fan DC link high voltage error Outdoor unit fan DC link high voltage error 7 7 1 Outdoor unit fan overcurrent error Outdoor unit fan current is 10A for 208 230V units 7 9 1 Outdoor unit fan operation failure error 2XWGRRU XQLW IDQ...

Page 70: ...Check the connection at the socket on the outdoor unit PCB Thermistor has disconnected or short circuited 1 5 4 Outdoor unit lower heat exchanger temperature sensor error Check the connection at the socket on the outdoor unit PCB Thermistor has disconnected or short circuited 1 8 2 Communication error between outdoor unit external ERDUG PDLQ DQG VXE 0 20V 2XWGRRU XQLW H WHUQDO ERDUG PDLQ WR VXE 0 ...

Page 71: ...te actions at the end of HVAC equipment life to recover recycle reclaim or destroy R410A refrigerant according to applicable US EPA rules Total System Refrigerant Charge To calculate the potential refrigerant concentration level RCL 1 0HDVXUH WKH RFFXSLHG VSDFH GLPHQVLRQV LQ IHHW 2 Calculate the cubic foot volume of air in the smallest occupied space To obtain a detailed overview of the RCL perfor...

Page 72: ...LRQV RI FXELF YROXPH RI VSDFH ZLWKLQ D RQH QFOXGH YHQWLODWLRQ JULOOHV LQ GRRUV LQFOXGH YHQWLODWLRQ LQOHWV RXWOHWV SDUWLWLRQV RI FXELF YROXPH RI VSDFH ZLWKLQ D RQH QFOXGH WKH DUHD DERYH WKH FHLOLQJ DV SDUW RI WKH UHWXUQ RU VXS SO DLU SDWK SDUWLWLRQV RI FXELF YROXPH RI VSDFH ZLWKLQ D RQH Install a mechanical ventilator linked to a gas leak detector Change the indoor unit type wall mounted to ceiling...

Page 73: ...tem ID Page Mech Contractor Company Name MEP Project Mngr Name Pre Com Tech Name Ph email Ph Email IDU s Unit Tag Building Floor Room ID Type Model Serial System Address Central Control Address Group member ID or N A if not in a group Group Function M Master S Slave Sensor Strategy RA ZC Both Adjusted Fan Setting Value Low Medium High ...

Page 74: ...VLRQ D FRS RI WKH V HVLJQHG 76 0XOWL 9 6 SLSLQJ WUHH GLDJUDP 25 1 3 3 6 25 1 7 1 6 5 0 352326 1 6 0867 25 5 72 7 6 1 1 1 5 62 7 7 7 1 1387 7 1 6 172 76 DQG 5 668 1 76 3 3 1 75 5 0 QVWDOOHU PXVW UHFHLYH change authorization from the design engineer because any change made requires the review of the entire tree diagram and verification that the change did not impact the size of piping segments in ot...

Page 75: ... code requirements Communications cable between the outdoor unit s and indoor units was connected in a daisy chain configuration i e single parallel chain No Star or multiple parallel circuits No cable splices or wire caps were used to connect communications cables Record Communication Voltage Range LG supplied cable was used between each indoor unit and its zone controller No cables were spliced ...

Page 76: ... 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 INSTALLATION CHECKLIST PAGE 3 Major Component Rough In Piping and Insulation Brazing Practices ...

Page 77: ... without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Installation Refrigerant Piping QVWDOODWLRQ RQGHQVDWH 3XPS UDLQ QVWDOODWLRQ Installation Power Wire and Communications Cables INSTALLATION CHECKLIST PAGE 4 ...

Page 78: ... constant 550 psig pressure for a minimum of 24 hours with all isolation valves open WULSOH V VWHP HYDFXDWLRQ KDV EHHQ SHUIRUPHG 0LFURQ JDXJH UHDGLQJ KHOG DW D PLQLPXP RI IRU KRXU ZLWK DOO LVRODWLRQ YDOYHV open and without the vacuum pump connected Power was energized to the outdoor unit s at ______________ time on __________day to warm the compressor crankcase 0XVW EH DW OHDVW VL KRXUV EHIRUH FRP...

Page 79: ...is checklist in its entirety BEFORE initiating a request for Commissioning Send all Pre commissioning Package Documents to your LG Applied Representative Prepare Pre commissioning Package Documents Include Check 1 FRS RI WKH UHIULJHUDQW SLSLQJ V VWHP V VKRS GUDZLQJ V JHQHUDWHG E 76 0XOWL 9 6 SLSH GHVLJQ VRIWZDUH 2 FRS RI WKH SLSH ILWWHU V SLSH FKDQJHV DQG ILHOG QRWHV 3 YHULILHG FRS RI WKH V XLOW 7...

Page 80: ...ct 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 PRE COMMISSIONING CHECKLIST Page 3 Notes for the Commissioning Agent ...

Page 81: ...ct 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 Notes for the Commissioning Agent PRE COMMISSIONING CHECKLIST Page 4 ...

Page 82: ...tion Job Name Location ________________________________________________________________________ Tag _________________ Date ____________________________________________________________________________________ Address _________________________________________________________________________________ _________________________________________________________________________________ Prepare Pre commissi...

Page 83: ...____________________________________________________ Address _________________________________________________________________________________ _________________________________________________________________________________ Refrigerant Circuit Preparation Prepare Pre commissioning Package Documents Initiate a Commissioning Request DWH RI RPPLVVLRQLQJ 5HSRUW BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB Commi...

Page 84: ...RXQWHG UW RRO 0LUURU SB SE 5k to 15k 0 53 10 DOO 0RXQWHG UW RRO 0LUURU SC 18k to 24k 0 62 11 DOO 0RXQWHG SV 30k to 36k 1 01 12 1 Way Cassette TU 7k to 12k 0 44 13 1 Way Cassette TT 18k to 24k 0 64 14 2 Way Cassette TL 18k to 24k 0 35 15 4 Way 2 x 2 Cassette TR 5k to 7k 0 40 16 4 Way 2 x 2 Cassette TR 9k to 12k 0 55 17 4 Way 2 x 2 Cassette TQ 15k to 18k 0 71 18 D DVVHWWH TNA 7k to 24k 0 89 19 4 Way...

Page 85: ...ctronics U S A Inc Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta Georgia 30022 www lg vrf com LG Electronics Products Support 1 888 865 3026 USA Follow the prompts for HVAC products 0B0XOWL9B6B2XWGRRU8QLWVB B 2ULJLQDO VVXH 0B0XOWL9B6B2XWGRRU8QLWVB 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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