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Refrigerant Piping Connections

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

1. Typical location (Air-conditioned location): When the piping passes through an indoor area where the indoor unit

operates.

•

Apartment, classroom, office, mall, hospital, etc.

2. Special location (Air-conditioned location):

1. When 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.

3. Typical location (Non-Air conditioned location): When the piping passes through an indoor area where the indoor unit

does not operate.

•

Hallway or a dormitory or school, etc.

Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM) Insulation Wall Thickness Requirements

4. Special location (Non-Air conditioned location): If conditions 1 and 2 below are present.

1. When the piping passes through an indoor area where the indoor unit does not operate.
2. When the humidity is high and there is no air flow in the location where the piping is installed.

•

The thickness of the above insulation material is based on heat conductivity of 0.61 Btu/in/h/ft

/°F.

Follow locals codes when selecting EPDM insulation wall thickness.

Classification

Air-conditioned location

Non-air conditioned location

1. Typical location

2. Special location

3. Typical location

4. Special location

Liquid pipe

ø1/4 inches

1/2 inches

ø3/8 inches

≥ø1/2 inches

1/2 inches

Vapor pipe

ø3/8 inches

1/2 inches

3/4 inches

1 inch

ø1/2 inches

ø5/8 inches

ø3/4 inches

ø7/8 inches

ø1 inch

ø1-1/8 inches

3/4 inches

ø1-1/4 inches

1 inches

1 inch

ø1-3/8 inches

ø1-1/2 inches

ø1-3/4 inches

Table 25: Insulation Guidelines for Typical and Special Circumstances.

refrIGerant PIPInG connectIons

Refrigerant Piping Insulation

Содержание Multi V ARUN053GF2

Страница 1: ...Installation Manual Variable Refrigerant Flow Outdoor Unit 4 4 Tons ...

Страница 2: ...of safety precautions begins on page 3 For more technical materials such as submittals engineering databooks and catalogs visit www lg vrf 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: ...s closed Do not run the compressor with the service valves closed There is a risk of equipment damage explosion physical injury or death Dispose 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 deat...

Страница 4: ...miliar with the U S National Electric Code NEC who is equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury or death All electric work must be performed by a licensed electrician and conform to local building codes or in the absence of local codes with the National...

Страница 5: ...r death If gas leaks out ventilate the area before operating the unit Leaking gas may cause fire electric shock explosion physical injury or death if the unit is mounted in an enclosed low lying or poorly ventilated area and the system develops a refrigerant leak To avoid physical injury use caution when cleaning or servicing the air conditioner Do not turn off the main power switch after operatio...

Страница 6: ... and Handling 16 25 Refrigerant Piping Connections 27 44 Pipe Routing 27 Device Connection Limitations 27 Refrigerant Piping System Examples 28 29 Selecting the Refrigerant Piping 30 Required LATS File 31 Acceptable Piping Layouts 32 Branch Pipe Fittings 33 34 Vacuum Mode 35 Leak Test 36 Evacuation 37 Additional Refrigerant Charge 38 39 Refrigerant Piping Insulation 40 43 Electrical Wiring 45 62 G...

Страница 7: ...a Combination Ratio between 95 105 Nominal capacity is outside the scope of AHRI Standard 210 240 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor ambient conditions of 95ºF dry bulb DB and 75ºF wet bulb WB Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb DB and 59ºF wet bulb W...

Страница 8: ...hanges and the system will not work properly General Data R410A Refrigerant R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and therefore 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 so the ozone depletion potential ...

Страница 9: ...areas of the country where these are unusual phenomena 2 Position the unit so that its airflow fans are not buried by direct heavy snowfall If snow piles up and blocks the airflow the system may malfunction 3 Install a snow protection hood 4 To prevent snow and heavy rain from entering the unit install the suction and discharge ducts facing away from direct winds Additionally the following conditi...

Страница 10: ...cean winds may cause corrosion particularly on the condenser and evaporator fins which in turn could cause product malfunction or inefficient performance Ocean winds Ocean winds General Installation Guidelines Oceanside Applications Required Clearances Figure 1 Oceanside Placement Oceanside Applications Required Clearances Allow adequate clearance for the system louvers see figure at right Automat...

Страница 11: ... rights reserved LG is a registered trademark of LG Corp Louver Specifications 26 23 1 2 38 1 4 3 1 4 Unit Inches Figure 4 Recommended Top and Side Clearance Spaces for the Multi V Space II Louver Do not bend the louvers as shown at right a bent louver disrupts the air circulation Figure 5 Recommended Effective Opening Ratio of Louver Required Clearances General Installation Guidelines ...

Страница 12: ...proof wall installation condition A 3 8 B 19 3 4 C 3 8 D Waterproof wall installation condition E 3 4 A 3 8 B 19 3 4 A 3 8 B 19 3 4 E 3 4 If a 11 3 4 D 5 7 8 If 11 3 4 a 19 3 4 D 9 3 4 Proper airflow through the Space II unit coil is critical for correct unit operation When installing the multiple Space II units consider service inlet and outlet and minimum allowable space requirements as illustra...

Страница 13: ...nds around the unit for packaging Do not use polypropylene bands to lift the unit Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death Lift the unit from the base at specified locations Support the unit at a minimum of six 6 points to avoid slippage from the rigging apparatus Do not drop the unit when carrying it with a forklift Us...

Страница 14: ...e Figure 7 Space II Unit Mounting Methods1 1 All referenced materials are to be field supplied Images are not to scale All dimensions 0 25 inches A Corners must be firmly attached otherwise the support will bend B Use a 3 8 inch anchor bolt D Insert cushion pad between Space II unit and base support to ensure sufficient anti vibration coverage E Pipe and wiring space F H beam support G Concrete ba...

Страница 15: ...ted Uneven Rough Pipe Reamer Point down Flare nut Copper tube Bar Copper pipe Clamp handle Red arrow Cone o e andle Bar Slanted n ide i hin with no rat he Smooth ven length amanged ur a e Cra ed Uneven thi ne n orre t Flare 1 2A 2B 3 4 4 Carefully inspect the flared pipe end Compare the geometry with the figure to the right and dimensions as detailed in Figure 8 If the flare is defective cut it of...

Страница 16: ...e etc Dry Clean Airtight Principles No moisture should be inside the piping No dust should be inside the piping No leaks should occur Problems Caused Significant hydrolysis of refrigerant oil Refrigerant oil degradation Poor insulation of the compressor System does not operate properly EEVs capillary tubes are clogged Refrigerant oil degradation Poor insulation of the compressor System does not op...

Страница 17: ...ping system Store pipe stock in a dry place keep stored pipe capped and clean Blow clean all pipe sections with dry nitrogen prior to assembly 2 Proper system operation depends on the installer using best practices and the utmost care while assembling the piping system Use adapters to assemble different sizes of pipe Always use a non oxidizing material for brazing Do not use flux soft solder or an...

Страница 18: ...nt dust water or other contaminants from entering the piping during installation Selecting Field Supplied Copper Tubing Copper is the only approved refrigerant pipe material for use with LG Multi V commercial air conditioning 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 tu...

Страница 19: ...e insulation covers Y branch Kits LG supplied Y branches must be used at each transition Field supplied T fittings or Y branches are not acceptable Each LG supplied Y branch kit comes with two 2 Y branches for indoor units step down pipe reducers and insulation covers Y branches may be installed in horizontal or vertical configurations When installed vertically position the Y branch so the straigh...

Страница 20: ...to the port closest to the outdoor unit Then install the next largest indoor unit to the next port work ing down to the smallest indoor unit Do not skip ports All indoor units must be mounted at an elevation below the Header fitting All indoor units connected to a single Header fitting should be located with an elevation difference between indoor units that does not exceed 49 feet If indoor units ...

Страница 21: ...common method is the inclusion of expansion Loop or U bends See Figure 20 on page 23 Each segment of pipe has a natural fixed point where no movement occurs This fixed point is located at the center point of the segment assuming the entire pipe is insulated 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 expansi...

Страница 22: ...33 1 40 1 47 1 54 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...

Страница 23: ...15 17 18 L2 54 63 70 83 94 104 113 1 1 2 R1 11 12 14 16 18 20 22 L2 66 77 86 101 115 127 138 2 R1 12 14 16 19 21 23 25 L2 77 89 99 117 133 147 160 2 1 2 R1 14 16 18 21 24 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 3 1 2 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 Lengt...

Страница 24: ...ot installed and a single indoor unit needs to be removed or repaired the entire system must be shut down and evacuated If isolation ball valves are installed and an indoor unit needs to be repaired the unaffected indoor units can remain operational Reclamation of refrigerant then can be restricted to a single indoor unit Position valves with a minimum distance of three 3 to six 6 inches of pipe o...

Страница 25: ...ax 12 Max 12 Max 12 Max 12 Max 12 Figure 25 Pipe Support at Header Fitting A properly installed pipe system will have sufficient supports to avoid pipes from sagging during the life of the system As necessary place supports closer for segments where potential sagging could occur Maximum spacing of pipe supports shall meet local codes If local codes do not specify pipe support spacing pipe shall be...

Страница 26: ...tallation 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 ...

Страница 27: ...to the outdoor unit must be removed before piping installation Device Connection Limitations The minimum number of connected and operating indoor units to Multi V Space II systems is one 1 taking into consideration the minimum combination ratio The maximum number of indoor units on a Multi V Space II unit is nine 9 Table 15 Multi V Space II Refrigerant Piping System Limitations Pipe Length ELF Equ...

Страница 28: ...its A Main Pipe from Space II Unit to Y branch B Y branch to Y branch C Y branch to Indoor Unit D Y branch to Farthest Indoor Unit Always reference the LATS Multi V software report See pages 29 30 for refrigerant pipe diame ter and pipe length tables Example Six 6 indoor units connected Space II Unit IDU Indoor Units Header A Main Pipe from Space II Unit to Header C Header to Indoor Unit D To Fart...

Страница 29: ...hes and Header Downstream Total Capacity of IDUs Btu h Liquid Pipe Inches O D Vapor Pipe Inches O D 19 100 Ø1 4 Ø1 2 54 600 Ø3 8 Ø5 8 76 400 Ø3 8 Ø3 4 Table 17 Refrigerant Pipe Diameter B from Y branch to Y branch Header Connection piping from branch to branch cannot exceed the main pipe diameter A used by the Space II unit Y branches and other header branches cannot be installed downstream of the...

Страница 30: ...ed to use LATS instead of manual calculations Selecting the Refrigerant Piping Example Five 5 indoor units connected Space II Unit IDU Indoor Units A Main Pipe from Space II Unit to Y branches B Branch Piping C Branch Piping to Indoor Unit IDU Gas Pipe Main Pipe Liquid Pipe Branch Piping IDU IDU IDU IDU C IDU IDU IDU C C C C C C C Space Unit A B Branch Piping B Header Header Selecting the Refriger...

Страница 31: ...design methods CAD mode and Tree mode CAD Mode Using the CAD mode the refrigerant pipe design and layout work is performed concurrently Simply import a copy of a plan view drawing dwg format for floor of the structure into LATS Multi V software Multi V air source units heat recovery units and indoor units can be selected from drag and drop lists and placed on the floor plan draw ing s and intercon...

Страница 32: ...od Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Header First Second First Second First Main Pipe Distribution Second Main Pipe Distribution First Second Third Main Pipe Distribution Various Acceptable Layouts Unacceptable Piping System Layouts A second branch cannot be installed after a header Refrigerant Piping Connections Acceptable Piping Layouts ...

Страница 33: ... 8 I D 3 8 O D 3 8 1 I D 1 2 I D 1 2 I D 1 2 13 1 16 12 5 8 I D 1 4 I D 1 4 I D 3 8 I D 3 8 I D 3 8 I D 5 8 I D 5 8 I D 5 8 I D 1 2 I D 1 2 I D 1 2 O D 1 2 O D 1 2 2 3 4 4 3 8 14 5 8 15 1 2 3 5 16 2 3 3 I D 3 4 I D 3 4 I D 3 4 2 I D 1 4 I D 3 8 I D 3 8 I D 1 2 O D 1 2 I D 1 2 4 3 8 4 3 8 16 3 8 17 1 2 O D 5 8 I D 5 8 I D 3 4 I D 5 8 I D 5 8 I D 3 4 I D 3 4 O D 3 4 3 3 16 2 3 1 2 3 3 3 13 16 I D 7 ...

Страница 34: ... 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 15 3 4 6 5 16 I D 5 8 I D 1 2 I D 3 4 I D 5 8 I D 7 8 I D 1 1 8 I D 1 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 I D 5 8 I D 1 2 I D 5 8 I D 1 2 I D 5 8 I D 3 4 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 2 6 5 16 22 7 8 I D 3 4 I D 5 8 ID15 88 5 8 I D 5 8 I D 1 2 I D 7 8 I D 1 1 8...

Страница 35: ... has been replaced or added The Space II unit does not operate during vacuum mode Space II unit compressor will not operate Switch the Space unit main PCB DIP switch SW02B to ON Nos 11 14 Vacuum Mode Setting Space unit valves open Main EEV SC EEV open Indoor unit EEVs open Reset the power to the Space unit Press and hold the black button SW01V on the main PCB for five 5 seconds Main PCB SW01S Main...

Страница 36: ...r must be used in a standing vertical position Nitrogen Gas Cylinder Liquid Pipe Gas Pipe Leak Test Figure 37 Leak Test Diagram The indoor units must be OFF and the DIP switches must be set to Vacuum Mode see page 35 before initializing the leak test Leak Test Leak Test Ambient Temperature Correction If the ambient temperature changed between the time when pressure was applied and when the pressur...

Страница 37: ...door unit EEVs may become damaged if the indoor units are turned off and on repeatedly without refrigerant in the lines R410A is a mixed refrigerant therefore any 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 Vacuum Pump Liquid Pipe Gas Pipe Use a vacuum pump that can evacu...

Страница 38: ...assette TP 24k to 28k 1 06 18 4 Way 3 x 3 Cassette TN 36k 1 41 19 4 Way 3 x 3 Cassette TM 42k to 48k 1 41 20 High Static Ducted BH 7k to 24k 0 57 21 High Static Ducted BG 15k to 42k 0 97 22 High Static Ducted BR 48k to 54k 1 37 23 High Static Ducted B8 76k to 95k 2 20 24 Low Static Ducted Low Static Ducted Bottom Return B1 B3 7k to 15k 0 37 25 Low Static Ducted Low Static Ducted Bottom Return B2 B...

Страница 39: ...d piping length feet 7 8 inches x 0 237 lbs ft Total liquid piping length feet 3 4 inches x 0 178 lbs ft Total liquid piping length feet 5 8 inches x 0 116 lbs ft Total liquid piping length feet 1 2 inches x 0 079 lbs ft Total liquid piping length feet 3 8 inches x 0 041 lbs ft Total liquid piping length feet 1 4 inches x 0 015 lbs ft Correction Factor CF lbs Example Additional Charge A 131 ft x 0...

Страница 40: ...it snugly against the refrigeration pipe with no air space between it and the pipe Insulation passing through pipe hangers inside conduit and or sleeves must not be compressed Protect insulation inside hangers and supports with a second layer All pipe insulation exposed to direct sunlight and deterioration producing elements must be properly protected with a PVC aluminum vapor barrier jacket or al...

Страница 41: ...lene Diene Methylene EPDM Insulation Wall Thickness Requirements 4 Special location Non Air conditioned location If conditions 1 and 2 below are present 1 When the piping passes through an indoor area where the indoor unit does not operate 2 When the humidity is high and there is no air flow in the location where the piping is installed The thickness of the above insulation material is based on he...

Страница 42: ... Fire resistant insulation When filling an access hole with mortar cover the area with steel plate so that the insulation will not fall through For this area use fire resistant materials for both the insulation and cover Vinyl cover should not be used Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls floors and pipes buried underground be properly insulated and rout...

Страница 43: ...ded with Header Kit Additional Insulation for Y Branches and Headers May be Required in Humid Environments If the system has been operating for a long time in a high humidity environment dew point temperature more than 73 F condensate 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 resis tance factor of mo...

Страница 44: ...tallation 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 ...

Страница 45: ...ctrical Code regulations related to electrical equipment and wiring and following the instructions in this manual Undersized wiring may lead to unacceptable voltage at the unit and may cause unit malfunction and be a fire hazard Properly ground the Space II unit and indoor units Ground wiring is required to prevent accidental electrical shock during current leakage communication problems from elec...

Страница 46: ...r units per National Electrical Code and local codes Figure 49 Schematic of Suggested Power Wiring Copper Wire Terminate multiple power wires of the same gauge to both sides Do not terminate two wires on one side Do not terminate different gauge wires to a terminal block Ring Terminal Power Wiring Connecting the Power Wiring Best practice dictates using ring or spade terminals to terminate power w...

Страница 47: ...Wiring and Cable Terminations Figure 52 Space II Unit Power Wiring and Communication Cable Connections Never apply line voltage power to the communications cable terminal block If contact is made the PCBs may be damaged Always include some allowance in the wiring length when terminating Provide some slack to facilitate removing the electrical panels while servicing Main PCB Inverter PCB Fan PCB Te...

Страница 48: ...e galva nized or nickel plate over steel Always verify the communication cable is connected to a communications terminal on the Space II 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 Space II unit to the indoor units should be grounded only to the Space II unit frame Tie the...

Страница 49: ...uge stranded four conductor communication cable shielded All other Central Controllers field provided 18 gauge stranded two conductor communication cable shielded Insulation material as recommended by local code Connect all central control devices such as AC Smart II AC Smart Premium ACP BACnet and LonWorks gateways and energy recovery ventilators all on the same cable Order does not matter Polari...

Страница 50: ...ntrol cable kit for each indoor unit in the group except for the last indoor unit Always use an LG provided group control communications cable Group Control Kit sold separately between the indoor unit and the wall mounted zone controller NEVER splice cut or extend cable length with field provided cable Before running cable decide which indoor unit will be the Master The zone controller will be con...

Страница 51: ...on of the indoor unit and only execute the test when all indoor units have stopped operation Auto test operation will not work where only one indoor unit is connected to the Space II unit Heat Pump model functions do not work on Cooling Only models Main PCB LED SW02V AutoAddressing SW01B SW02B Figure 57 Space II Unit Main PCB DIP Switch Locations ON OFF ON OFF SW01B SW02B Figure 58 Space II Unit D...

Страница 52: ...this number should match the known installed number of indoor units 8 Upon completion of the auto addressing routine the address of each indoor unit is indicated on the wired remote control display window CH01 CH02 CH03 CH06 indicates number of connected indoor units 9 Upon successful completion of the auto address procedure record the system address assigned to each indoor unit by the auto addres...

Страница 53: ... each indoor unit is shown on the wired remote controller display or on the indoor unit display The address number will disappear after pressing the on off button on the remote controller If CH01 CH02 CH06 is displayed that means that six 6 indoor units have been successfully auto addressed Initiate auto addressing procedure Wait three 3 minutes Power On Press hold Auto Address Button SW02V for fi...

Страница 54: ...gment shields should be spliced together at each indoor unit and NOT grounded 4 After repairing the communications cable repeat the auto addressing process until successful Press and hold red Auto Address Button for about five 5 seconds Release when 88 appears on the LED After three 3 to seven 7 minutes the display will flash a number for about ten 10 seconds indicating how many indoor units the s...

Страница 55: ...p If not already recorded record the Master and the Slave identity assignment to each indoor unit in the group on the Pre commissioning Device Configuration Worksheet 3 Termination Procedure Starting with the Master unit plug in the male end of the pigtail cable into the CN REMO socket At the last Slave indoor unit in the group a pigtail cable is not required Plug the male end of the extension cab...

Страница 56: ...I unit and multiple systems serve a building Assign a Group Number to each system If there are more than 16 indoor units on a system multiple Group Numbers may be necessary If the building owner wants to know which indoor units are on each floor Assign a different group number for each floor If there are more than 16 indoor units on a floor multiple Group Numbers may be necessary Member Number Can...

Страница 57: ... the setup function 02 icons are different for each controller Refer to the controller user s manual for more information Type in the Central Control address designated for the Master indoor unit 7 Disable power to the Master indoor unit Do not restore Power to the Master indoor unit at this time It shall be restored in step 18 8 If the zone controller and associated communications cable has alrea...

Страница 58: ...nt 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 compressor operation indicator light Liquid injection valves operation indicator lights Hot gas bypass valve operation indicator light Four way reversing valve operation indicator light Pressure g...

Страница 59: ... connector kit When connected through IDU 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 diagnostic evaluations Recommended Minimum PC Configuration Error Codes LGMV software helps the service technician or commissioning agent t...

Страница 60: ... Drain pump and or flow switch is are malfunctioning Also check drain line for obstructions 0 5 Communication error between Space II unit and indoor unit Indoor unit has not received communications signal from Space II unit Check indoor unit to Space II unit communication cable for issues Check A terminals are connected to indoor unit A and 3 5 on 3 x 3 cassette terminals B connect to B or 4 6 on ...

Страница 61: ...PCB Thermistor has disconnected or short circuited 4 6 1 Space II unit compressor suction pipe temperature sensor error Check the connection on the Space II unit PCB Thermistor has disconnected or short circuited 5 1 1 Combination ratio is out of range The total of the nominal indoor unit capacity is less than 50 or more than 130 of the nominal Space II unit capacity 5 2 1 Communication error betw...

Страница 62: ...tage is 140V for 208 230V units 1 1 3 1 Space II unit liquid pipe temperature sensor error Check the connection on the Space II unit PCB Thermistor has disconnected or short circuited 1 1 4 1 Space II unit subcooling outlet temperature sensor error 1 1 5 1 Space II unit subcooling inlet temperature sensor error 1 5 1 1 Space II unit operation mode conversion error Space II unit is experiencing a p...

Страница 63: ...evel in the space where the indoor unit will be mounted meets the concentration limit for the application 1 1 American Society of Heating Refrigeration and Air Conditioning Engineers 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 the end of HVAC equipment life to recover recycle r...

Страница 64: ... the calculated RCL is above the allowable limit there are two primary methods used to lower the RCL 1 Increase the volume of the occupied space 2 Decrease the size of the refrigerant charge Per Standard 34 2007 acceptable methods used to increase the volume of an occupied space include Install transfer ducts between rooms Undercut and overcut doors partitions 0 15 of cubic volume of space within ...

Страница 65: ...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 ...

Страница 66: ...GES ARE MADE PROPOSED CHANGES MUST BE FORWARDED TO THE DESIGN ENGINEER SO THAT THEY CAN INPUT THE CHANGES INTO LATS and RE ISSUE A NEW LATS MULTI V PIPING TREE DIAGRAM Installer must receive 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 other parts o...

Страница 67: ... unit was installed per all local electrical code requirements Power wiring to each indoor unit was installed per all local electrical code requirements Communications cable between the Space II unit and indoor units was connected in a daisy chain configuration i e single paral lel chain No Star or multiple parallel circuits No cable splices or wire caps were used to connect communications cables ...

Страница 68: ..._____________________________________________________ Refrigerant Circuit Preparation Description Check Using a copy of the LATS Multi V pipe design diagram verify the sum of the indoor unit nominal capacity connected to the piping system is between 50 and 130 of the Space II unit s nominal capacity If this rule is violated the system will not start Check all indoor units for power at the unit dis...

Страница 69: ...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 2 Notes for the Commissioning Agent ...

Страница 70: ...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 ...

Страница 71: ...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 4 Notes for the Commissioning Agent ...

Страница 72: ... 3 x 3 Cassette TN 36k 1 41 19 4 Way 3 x 3 Cassette TM 42k to 48k 1 41 20 High Static Ducted BH 7k to 24k 0 57 21 High Static Ducted BG 15k to 42k 0 97 22 High Static Ducted BR 48k to 54k 1 37 23 High Static Ducted B8 76k to 95k 2 20 24 Low Static Ducted Low Static Ducted Bottom Return B1 B3 7k to 15k 0 37 25 Low Static Ducted Low Static Ducted Bottom Return B2 B4 18k to 24k 0 82 26 Vertical Horiz...

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Страница 75: ...For further technical materials such as submittals engineering manuals service manuals and catalogs visit www lg vrf com ...

Страница 76: ...ion 11405 Old Roswell Road Alpharetta Georgia 30009 www lg vrf com VRF IM BS 001 US 014B14 LG Customer Information Center Commercial Products 1 888 865 3026 USA Follow the prompts for commercial A C products 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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