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LG LC187HV Engineering Manual Download Page 60

reFrigerant PiPing DeSign

refrigerant Piping System Layout

Piping can be installed 

in one of four different 

layouts.

outdoor unit refrigerant Piping Connections

Figure 44: Removing the Refrigerant Piping Connection Cover 

(LUU187HV, LUU247HV).

Figure 45: LUU187HV, LUU247HV Refrigerant Piping Connections.

Figure 46: LUU367HV, LUU427HV Refrigerant Piping Connections.

Piping Connection for a Single Zone System 

1.  Remove the connection cover from the unit by loosening the 

screws.

2.  Align the center of the refrigerant pipe and corresponding con-

nection, and tighten the flare nut by hand.

3.  Tighten the flare nut with a torque wrench until the wrench clicks. 

See page 61 for guidelines for the torque amount to use.

Outdoor unit 

Gas side piping

(Bigger diameter)

Liquid side piping

(Smaller diameter)

Torque wrench

Connection cover

Refer to the Installation Manual for indoor unit refrigerant piping 

connections.

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.

60   |   duct (HIGH StatIc)

Ceiling-Concealed Duct (High Static) System Engineering Manual

Summary of Contents for LC187HV

Page 1: ...ne Four Way Ceiling Cassette System Engineering Manual Single Zone Four Way Ceiling Cassette Heat Pump Systems 1 5 to 3 5 Tons LC187HV 18 000 Btu h LC247HV 24 000 Btu h LC367HV 36 000 Btu h LC427HV 42 000 Btu h ...

Page 2: ... document as well as all reports illustrations data information and other materials are the property of LG Electronics U S A Inc and are disclosed by LG Electronics U S A Inc only in confidence This document is for design purposes only This document as well as all reports illustrations data information and other materials are the property of LG Electronics U S A Inc ...

Page 3: ...ion 62 63 Condensate Drain Piping 63 64 Electrical and Mechanical Specifications 65 71 Wiring Connections 66 69 Mechanical Specifications 70 71 Acronyms 72 TABLE OF sYMBOLS This symbol indicates a potentially hazardous situation which if not avoided may result in death or serious injury This symbol indicates additional helpful information such as an explanation a comment or a clarification about t...

Page 4: ... little to no duct work or sheet metal is required Inverter Technology LG DFS air source systems offer zoning without the need for zone damper systems The advanced controls of the four way ceiling cassette system provide exceptional temperature and air flow control and can rapidly adapt system operating parameters to the ever changing building load Single zone DFS systems are easy to design instal...

Page 5: ...t Low Static H Ceiling Concealed Duct High Static V Vertical Horizontal Air Handling L LG 09 9 000 12 12 000 18 18 000 24 24 000 30 30 000 36 36 000 42 42 000 54 54 000 L SV 2 N N Indoor Unit U Outdoor Unit No N or U System H Heat Pump Generation Due to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All r...

Page 6: ...ssette Systems Inverter technology Available in 18 000 24 000 36 000 42 000 Btu h capacities All season use heat pump models for both cooling and heat ing capabilities Operating ranges for outdoor units of 5 F DB to 118 F for cooling 0 F to 64 F WB for heating Operating ranges for indoor units of 64 F to 86 F for cooling 60 F to 86 F for heating Quiet operation inside and outside Inverter variable...

Page 7: ...eral Data on page 9 Electrical Data on page 10 Dimensions on page 11 Acoustic Data on page 15 Air Velocity and Temperature Distribution on page 17 Refrigerant Flow Diagrams on page 19 Wiring Diagrams on page 21 Accessories on page 24 Product data ...

Page 8: ... ceiling cassette systems delivers precise space temperature control Inverter Driven The compressor is optimized to maximize compressor efficiency which reduces power consumption and monthly utility bills This inverter technology allows the LG four way ceiling cassette outdoor unit to vary the com pressor motor shaft speed and deliver an appropriate amount of cooling to the indoor unit Occupants r...

Page 9: ...ive Brushless Digitally Controller Direct Airflow Rate Indoor Unit Max H M L CFM 565 494 424 600 530 459 1 060 989 918 1 060 989 918 Outdoor Unit CFM 2 048 2 048 1 942 x 2 1 942 x 2 Piping Liquid in 3 8 Vapor in 5 8 Indoor Unit Condensate Drain O D I D in 1 1 4 1 Additional Refrigerant Charge oz ft 0 43 Maximum Pipe Length ft 164 246 Piping Length no additional refrigerant ft 25 Maximum Elevation ...

Page 10: ... Compressor Quantity Compressor Motor RLA Cooling Condenser Fan Motor s Condenser Fan Quantity Condenser Fan Motor FLA 1 5 LUU187HV 60 208 230 187 253 18 1 30 1 13 5 1 0 6 2 LUU247HV 3 LUU367HV 24 5 40 1 18 0 2 0 6 x 2 3 5 LUU427HV Voltage tolerance is 10 Maximum allowable voltage unbalance is 2 RLA Rated Load Amps MCA Minimum Circuit Ampacity Maximum Overcurrent Protection MOP is calculated as fo...

Page 11: ...Outdoor Unit Dimensions LUU187HV LUU247HV Job Name Location Tag Date PO No Single Zone High Static Duct Page 2 of 3 DFS SB AM 001 US 013E28 For continual product development LG reserves the right to change specifications without notice LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG Life s Good is a registered trademark of LG Corp www lghvac com Outdoor Unit ODU LUU247HV Figure...

Page 12: ...Engineering Manual Outdoor Unit Dimensions LUU367HV LUU427HV Job Name Location Tag Date PO No Single Zone High Static Duct Page 2 of 3 DFS SB AM 002 US 013E28 For continual product development LG reserves the right to change specifications without notice LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG Life s Good is a registered trademark of LG Corp www lghvac com Outdoor Unit ...

Page 13: ... Figure 4 LCN187HV LCN247HV Indoor Unit Dimensions Indoor Unit Dimensions Job Name Location Tag Date PO No Ceiling Cassette Single Zone Page 3 of 3 DFS SB AC 006 US 013E23 For continual product development LG reserves the right to change specifications without notice LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG Life s Good is a registered trademark of LG Corp www lghvac com ...

Page 14: ... Engineering Manual Figure 5 LCN367HV LCN427HV Indoor Unit Dimensions Indoor Unit Dimensions Job Name Location Tag Date PO No Ceiling Cassette Single Zone Page 3 of 3 DFS SB AC 007 US 013E23 For continual product development LG reserves the right to change specifications without notice LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG Life s Good is a registered trademark of LG C...

Page 15: ...utdoor Unit Sound Pressure Levels dB A Model Sound Pressure Levels dB A Cooling Heating LUU187HV 48 52 LUU247HV 48 52 LUU367HV 52 54 LUU427HV 52 54 Figure 6 Four Way Ceiling Cassette Outdoor Unit Sound Pressure Level Measurement Location 3 3 ft 4 9 ft D Figure 7 Four Way Ceiling Cassette Outdoor Unit Sound Pressure Level Diagrams LUU187HV LUU247HV LUU367HV LUU427HV Octave Band Center Frequency Hz ...

Page 16: ...e measured in dB A 3 Tested in anechoic chamber per ISO Standard 3745 Octave Band Center Frequency Hz Octave Band Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold Octave Band Center Frequency Hz Octave Band Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 6...

Page 17: ...13ft 10ft 10ft 13ft 7ft 7ft 3ft 3ft 0ft 9ft 7ft 3ft 0ft 13ft 10ft 10ft 13ft 7ft 7ft 3ft 3ft 0ft 9ft 7ft 3ft 0ft 13ft 10ft 10ft 13ft 7ft 7ft 3ft 3ft 0ft 6 6 6 6 4 6 4 6 3 3 3 3 Discharge angle 50 Air velocity ft s Temperature F 91 91 86 86 81 81 75 75 72 72 75 75 6 6 6 6 3 3 3 3 1 6 1 6 68 64 64 68 72 72 73 73 Cooling Heating Discharge angle 40 Air velocity ft s Temperature F 9ft 7ft 3ft 0ft 13ft 1...

Page 18: ...10ft 16ft 7ft 3ft 3ft 0ft 7ft 3ft 10ft 7ft 13ft 10 5ft 13ft 16ft 10ft 16ft 7ft 3ft 3ft 0ft 7ft 3ft 10ft 7ft 13ft 10 5ft 13ft 16ft 10ft 16ft 7ft 3ft 3ft 0ft 7ft 3ft 10ft 7ft 13ft 10 5ft 13ft 16ft 10ft 16ft 7ft 3ft 3ft 0ft 7ft 3ft 10ft 7ft 13ft 75 91 91 75 81 81 86 86 72 72 13 1 13 1 9 8 9 8 6 6 6 6 3 3 3 3 64 64 68 68 72 72 75 75 Cooling Heating Discharge angle 40 Air velocity ft s Temperature F 13...

Page 19: ...ature Thermistor Condenser Inlet Temperature Thermistor CN TH4 CN TH4 Pressure Sensor CN TH1 P SENSOR H Table 6 Four Way Ceiling Concealed Outdoor Unit Thermistor Details Outdoor Unit Refrigerant Flow Diagram Refrigerant Flow Cooling Heating M M High Pressure Sensor 4 way 36k 42k model only Valve Discharge Temperature Thermistor Suction Temperature Fusible Plug Thermistor Accumulator Inverter Comp...

Page 20: ...LC187HV LC247HV LC367HV LC427HV 5 8 3 8 Table 8 Four Way Ceiling Cassette Indoor Unit Thermistor Details Description Based on Cooling Mode PCB Connector Indoor Air Temperature Thermistor CN ROOM Evaporator Inlet Temperature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Heat exchanger Gas pipe connection port flare connection Liquid pipe connection port flare connection...

Page 21: ...e 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 Wiring Diagram Figure 16 Four Way Ceiling Cassette LUU187HV and LUU247HV Outdoor Unit Wiring Diagram LUU187HV and LUU247HV ...

Page 22: ...lectronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 22 Four Way Cassette Four Way Ceiling Cassette System Engineering Manual Outdoor Unit Wiring Diagram LUU367HV and LUU427HV Figure 17 Four Way Ceiling Cassette LUU367HV and LUU427HV Outdoor Unit Wiring Diagram ...

Page 23: ...ome 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 LCN187 247 367 427HV Indoor Unit Wiring Diagram Figure 18 Four Way Ceiling Cassette LCN187 247 367 427 HV Indoor Unit Wiring Diagram ...

Page 24: ...Also provides subfunction control Included with the four way ceiling cassette indoor units Wall Mounted Remote Temperature Sensor PQRSTA0 Ivory 50 Allows remote temperature measurement for four way ceiling cassette ceiling concealed duct indoor units Table 9 Summary Data Zone Controllers Before specifying or placing an order refer to the V Net Network Solutions Engineering Product Data Book and re...

Page 25: ... 24 VAC PQDSB1 Indoor Unit ON OFF Run Status Error Status 1 2 Enables the indoor unit to be controlled and monitored by third party controls using binary inputs and outputs Dry Contact Unit for Setback PQDSBC ON OFF Mode Controller Lock Power Save Run Status Error Status 2 2 Dry Contact Unit for Thermostat PQDSBNGCM1 ON OFF Thermo ON OFF Mode Fan Speed Run Status Error Status Enables the indoor un...

Page 26: ...demand control PDI integration andAC Manager Plus integration advanced functionality in addition to basic unit control and monitoring Advanced Control Platform ACP Premium PQCPC22A1 256 16 64 128 with PDI Premium 10 4 24 VAC Before specifying or placing an order refer to the V Net Network Solutions Engineering Product Data Book and review the detailed technical data provided to fully understand th...

Page 27: ...uto Elevation Grille2 o Hot Start Self diagnostics Soft Dry dehumidification Auto changeover Auto operation Auto restart Child lock Forced operation Group control Requires the use of one Group Control Cable Kit PZCWRCG3 for every additional indoor unit o Sleep mode Timer on off Weekly schedule Two thermistor control Controllers 7 Day programmable controller o2 Simple wired remote controller o2 Wir...

Page 28: ...or a separate interface device The main screen for LGMV allows the user to view the following real time data on one screen Additional information that can be gathered from the main screen 1 Graph Graphic shows the following Compressors showing actual speeds EEVs IDUs Low and high pressures Temperature sensors Four way reversing valve Outdoor fans showing status and speeds 2 Setting Converts metric...

Page 29: ... Cooling Capacity Data on page 30 Heating Capacity Data on page 34 PERFORMANCE DATA ...

Page 30: ... 15 66 0 67 18 61 16 55 0 91 19 70 17 03 0 98 20 49 16 36 1 00 21 88 16 50 1 00 22 96 16 81 1 00 70 17 50 15 77 0 69 18 58 16 65 0 93 19 67 17 14 1 01 20 46 16 47 1 02 21 84 16 60 1 02 22 93 16 92 1 02 75 17 08 15 51 0 73 18 16 16 40 0 96 19 24 16 90 1 03 20 03 16 25 1 05 21 41 16 40 1 06 22 50 16 73 1 07 80 16 66 15 24 0 77 17 74 16 14 0 99 18 82 16 66 1 06 19 60 16 02 1 08 20 98 16 20 1 10 22 06...

Page 31: ...9 17 1 04 24 78 20 25 1 41 26 23 20 84 1 52 27 27 20 02 1 55 29 13 20 19 1 55 30 57 20 57 1 55 75 22 77 18 85 1 11 24 21 19 94 1 45 25 66 20 55 1 57 26 70 19 75 1 59 28 55 19 94 1 61 29 99 20 34 1 62 80 22 21 18 53 1 17 23 65 19 63 1 50 25 09 20 25 1 61 26 13 19 48 1 64 27 97 19 69 1 66 29 42 20 10 1 68 85 21 65 18 19 1 33 23 09 19 30 1 63 24 53 19 93 1 72 25 57 19 19 1 75 27 40 19 43 1 78 28 84 1...

Page 32: ...0 97 29 18 2 36 43 75 29 43 2 36 45 93 29 98 2 36 70 34 99 28 12 1 61 37 17 29 70 2 19 39 34 30 58 2 37 40 91 29 37 2 41 43 69 29 61 2 41 45 86 30 18 2 41 75 34 15 27 66 1 72 36 32 29 25 2 26 38 49 30 15 2 43 40 05 28 98 2 48 42 82 29 26 2 50 44 99 29 83 2 51 80 33 31 27 18 1 82 35 47 28 79 2 33 37 64 29 71 2 50 39 20 28 58 2 55 41 96 28 89 2 59 44 12 29 48 2 62 85 32 48 26 69 2 07 34 63 28 31 2 5...

Page 33: ...04 34 65 3 24 53 58 35 30 3 23 70 40 83 33 11 2 21 43 36 34 97 3 00 45 90 36 00 3 25 47 73 34 58 3 30 50 97 34 87 3 30 53 50 35 53 3 30 75 39 84 32 56 2 36 42 37 34 44 3 10 44 90 35 50 3 34 46 73 34 12 3 39 49 96 34 45 3 42 52 49 35 13 3 44 80 38 86 32 01 2 50 41 39 33 90 3 19 43 91 34 98 3 42 45 73 33 65 3 49 48 95 34 01 3 54 51 48 34 72 3 59 85 37 89 31 42 2 84 40 41 33 33 3 47 42 92 34 43 3 67 ...

Page 34: ... 1 93 5 4 5 17 72 1 80 16 91 1 86 16 65 1 90 16 30 1 92 16 01 1 94 15 37 2 00 10 9 18 97 1 85 18 21 1 91 17 80 1 96 17 44 1 98 17 15 2 01 16 48 2 07 17 15 20 35 1 91 19 64 1 97 19 07 2 04 18 70 2 07 18 40 2 10 17 69 2 16 20 19 21 18 1 96 20 50 2 02 19 84 2 09 19 46 2 13 19 16 2 16 18 43 2 22 25 23 22 57 2 04 21 90 2 10 21 14 2 18 20 74 2 22 20 42 2 26 19 65 2 32 30 28 23 96 2 13 23 22 2 20 22 42 2...

Page 35: ... outdoor unit Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb DB and 60ºF wet bulb WB and outdoor ambient conditions of 47ºF dry bulb DB and 43ºF wet bulb WB Table 23 LC427HV System Heating Capacity Table Model No Nominal Capacity Btu h Outdoor Air Temp Indoor Air Temp F DB F DB F WB 61 64 68 70 72 75 TC PI TC PI TC PI TC PI TC PI TC PI LC427HV 42 000 0 ...

Page 36: ... 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 36 Four Way Cassette Four Way Ceiling Cassette System Engineering Manual ...

Page 37: ... Equipment Selection Procedure on page 38 Building Ventilation Design Guide on page 40 Placement Considerations on page 45 Application Guidelines ...

Page 38: ...tained from the capacity table using design conditions The result is the NET cooling or heating capacity Refrigerant Line Length Derates For air cooled systems a capacity correction factor may have to be applied to account for the length of the system s refrigerant pipe Rate of change in capacity due to increased piping lengths is shown below Table 25 Heating Capacity Coefficient Factor Piping Len...

Page 39: ... 27 Check the Indoor and Outdoor Unit Selection s Compare the corrected cooling and heating capacities to the load calculations Is each capacity sufficient for the zone it serves For each indoor unit the corrected capacity must be at least equal to the total of the cooling design load plus ventilation load if applicable for the space s served by the indoor unit For each indoor unit the corrected c...

Page 40: ... Inc takes no responsibility and offers no warranty expressed or implied of merchantability or fitness of purpose if this method fails to perform as stated or intended For a complete copy of ASHRAE Standard 62 1 and 62 2 refer to the American Standard of Heating and Air Conditioning Engineers ASHRAE website at www ashrae org Method 1 Natural Ventilation Non Ducted Unconditioned Outdoor Air Natural...

Page 41: ...er cooled nor heated before entering the building Advantages Outdoor air may be manually controlled by the occupant or auto matic controls may be installed to open close outdoor air dampers or to turn on off ventilation fans Useful for large open spaces like warehouses garages and workshops Outdoor air volume is a known quantity Air loads may be easier to calculate since fans will regulate the amo...

Page 42: ...ls of the occupied space Disadvantages Fan s will be required to push outdoor air to the indoor unit to overcome the additional static pressure Filter required to be added to the outdoor air duct Ducted and four way cassette models are the only indoor units that accept the connection of an outdoor air duct to the unit case In most cases in lieu of using the factory mounted return air thermistor on...

Page 43: ... conditions Advantages Indoor unit capacity may not need to be increased because of outdoor air Fan and filter system is centralized to the main outdoor air unit Disadvantages Ducted and four way cassette indoor units are the only models designed for direct connection of an outside air duct Ceiling space is required for ductwork Failure of outdoor air may impact indoor unit operation In lieu of us...

Page 44: ...on of indoor unit the resulting untreated air will be readily noticed by the occupants The outdoor air unit may supply neutral air to the occupant space even when the Duct Free Split system indoor unit fan changes speed or cycles on and off DDOAS controls do not have to be interlocked with the Duct Free Split system In lieu of installing localized smaller outside air treatment equipment throughout...

Page 45: ...tic field minimum 3 1 3 feet away Do not install the unit near a doorway The unit may be damaged may malfunction and or will not operate as designed if installed in any of the conditions listed Installing in a High or Dropped Ceiling High or dropped ceilings often found in commercial buildings and offices may cause a wide temperature differentiation To countermeasure Change the indoor unit mode se...

Page 46: ... Drain piping specifications Indoor Unit Drain Connection 1 1 4 inch outside diameter Field Supplied Drain Piping Polyvinyl chloride piping with 1 inch inside diameter and pipe fittings 1 50 1 100 31 1 2 inches Figure 28 Indoor Unit Drain Piping Installing in an Area with High Humidity Levels If the environment is prone to humidity levels of 80 or more near the ocean lakes etc or where steam could...

Page 47: ...stible gas may generate flow stagnate or leak Don t install the unit in a location where oil acidic solutions sprays or dust sulfur carbon other corrosive materials are present often used Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it When deciding on a location to place the outdoor unit be sure to choose an area where run off from defro...

Page 48: ...ication cable should be installed five 5 feet away from lightning rod A high resistance ground system should be included to protect against induced lightning or indirect strike Ground Safe zone Lightning rod Protection Angle 25 55 1 5m 5 feet Lightning rod Figure 29 Lightening Protection Diagram Table 30 Safety Zone Specifications Building Height feet 66 98 148 197 Protection Angle 55 45 35 25 If ...

Page 49: ...latform Minimum 7 7 8 7 7 8 15 3 4 Minimum 24 13 32 Unit Inch Outdoor Unit Bolt Type Concrete Height Bolt Depth LUU187HV LUU247HV M10 J Minimum 7 7 8 inches Minimum 2 3 4 inches LUU367HV LUU427HV M10 J Minimum 2 3 4 inches Table 31 Outdoor Unit Foundation Specifications LUU367 427HV Outdoor Unit LUU187 247HV Outdoor Unit Bolting the Outdoor Unit to the Platform Bolting the Outdoor Unit to the Plat...

Page 50: ...ion Outdoor Unit Service Access and Allowable Clearances Appropriate airflow through the outdoor unit coil is critical for proper unit operation Include enough space for airflow and for service access If installing multiple outdoor units avoid placing the units where the discharge of one unit will blow into the inlet side of an adjacent unit No obstacles to air circulation around the unit keep pro...

Page 51: ...acles above and on the air discharge side Where there are obstacles on both suction and discharge sides discharge side obstacle is higher than the outdoor unit Where there are obstacles above and on both suction and discharge sides discharge side obstacle is higher than the outdoor unit Maximum 19 11 16 Minimum 11 13 16 Minimum 39 3 8 L H A Minimum 19 11 16 Minimum 11 13 16 Where there are obstacl...

Page 52: ...d Unit Inch L Minimum 39 3 8 Minimum 39 3 8 Maximum 19 11 16 Minimum 11 13 16 Where there are obstacles on both suction and discharge sides discharge side obstacle is lower than the outdoor unit Where there are obstacles above and on both suction and discharge sides discharge side obstacle is lower than the outdoor unit Minimum 19 11 16 Minimum 11 13 16 H Minimum 11 13 16 Minimum 78 3 4 Minimum 23...

Page 53: ...esign Layout Best Practices Design Guideline Summary on page 54 Selecting Field Supplied Copper Tubing on page 55 Refrigerant Piping System Layout on page 58 Piping Insulation on page 62 Condensate Drain Piping on page 63 ...

Page 54: ...nce between fittings and indoor or outdoor units 20 inches 20 inches Elevation All Elevation Limitations are Measured in Actual Feet If outdoor unit is above indoor unit 98 feet 98 feet If outdoor unit is below indoor unit 98 feet 98 feet DFS System Layout Outdoor unit Indoor unit A B Outdoor unit Indoor unit A B 98 98 164 Max Length A Max Elevation B 164 Unit Feet Figure 34 Typical LC187HV and LC...

Page 55: ... of expansion Loop or U bends See Figure 36 on page 56 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 expansion can be calculated using the...

Page 56: ...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 09 2 20 2 31 2 42 2 38 2 53 2 86 3 08 3 19 3 30 240 0 96 0 96 1 20 1 44 1 56 1 68 1 80 1 92 2 04 2 16 2 28 2 40 2 52 2 64 2 59 2 76 3 12 3 36 3 48 3 60 260 1 04 1 04 1 30 1 56 1 69 1 82 1 95 2 08 2 21 2 34 2 47 2 60 2 73 2 86 2...

Page 57: ...e outdoor units and the indoor units The components may cause vapor to form in the liquid stream Over time dryers may deteriorate and introduce debris into the system No Pipe Size Substitutions Use only the pipe size as conveyed in the product installation instructions Using a different size is prohibited and may result in a system malfunction or failure to work at all Using Elbows Field supplied ...

Page 58: ...ed as long as they do not compress the pipe in sulation 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 from sagging during the life of the system As necessary place supports closer for segments w...

Page 59: ...on Vapor Line Liquid Line Min 18 Gauge Communications Cable Pipe Sleeve Insulation Material Insulation Material Underground Refrigerant Piping Refrigerant pipe installed underground should be routed inside a vapor tight protective sleeve to prevent insulation deterioration and water infiltration Refrigerant pipe installed inside underground casing must be continuous without any joints Underground ...

Page 60: ...the refrigerant pipe and corresponding con nection and tighten the flare nut by hand 3 Tighten the flare nut with a torque wrench until the wrench clicks See page 61 for guidelines for the torque amount to use Outdoor unit Gas side piping Bigger diameter Liquid side piping Smaller diameter Torque wrench Connection cover Refer to the Installation Manual for indoor unit refrigerant piping connection...

Page 61: ...ebris such copper burrs slag or carbon dust during installation Flare Connection Practices 1 Place a couple of drops of refrigerant oil on the opening rim of the flare before assembling Take care not to add any contaminants 2 Align the center of the refrigerant pipe and corresponding connection and tighten the flare nut by hand 3 Following the guidelines as outlined in Table 42 for the amount of t...

Page 62: ... the LG provided insulation plugs on the ends of all unused header ports Peel the adhesive glue protector slip from the insulation jacket and install the clam shell jacket over the fitting Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene EPDM Insulation Wall Thickness Requirements Follow locals codes when selecting EPDM insulation wall thickness Table 43 Insulation Guidelines for Typica...

Page 63: ...ondensate drainage system stable see table below and to reduce vibration Indoor unit Or Outdoor unit Gradient of at least 1 50 1 100 Figure 52 Condensate Drain Piping Gradient Pipe Diameter Inches 13 16 1 9 16 1 9 16 2 2 9 16 4 15 16 Maximum Interval feet 3 28 4 5 Table 44 Interval per Drainage Pipe Diameter Indoor Unit Drain Pipe Dia inches External Internal Drain Pump Drain Lift Height inches Am...

Page 64: ...mon drain pipe Figure 55 Properly Insulated Condensate Drain Piping Sharp crook Sharp bend Clamp connection Reverse slope Water flow Figure 56 Condensate Drain Piping Should Not Include Sharp Bends Drain Piping Leak Test Test the condensate drain piping system for leaks 24 hours after installation is complete Use only water to test the drain piping Insulation required Insulation not required Insul...

Page 65: ... Wiring Connections on page 66 Mechanical Specifications on page 70 Acronyms on page 72 Electrical and Mechanical Specifications ...

Page 66: ...from touching the piping Use ring terminals to attach the wiring Verify that all power wiring and communications cable terminals are securely attached ensure enough slack is included in the wiring and cables to avoid damaging the connections Use a conduit to protect the power wiring Do not install a phase advancing capacitor the outdoor unit may overheat Verify all wiring cable connections are app...

Page 67: ...lude some allowance in the wiring length when terminating Provide some slack to facilitate removing the electrical panels while servicing 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 If power wires are not properly terminated and or firmly attached there is a risk of fire...

Page 68: ...le with the cord clamp 7 Secure conduit tubes with lock nuts 8 Reattach the control cover with screws Figure 64 LUU187 247HV Outdoor Unit Terminal Block Location Outdoor Unit Electrical Connection Terminal block Over 0 2 Control cover Conduit panel Connecting cable Power supply cord Connection might look slightly different depending on Single Zone ODU being used Figure 65 LUU367 427HV Outdoor Unit...

Page 69: ...magnetic interference and prod uct malfunction leave a space between the power wiring and communications cable outside of the indoor unit 3 Connect each wire to its appropriate terminal on the indoor unit control board Verify that the color and terminal numbers from the outdoor unit wiring match the color and terminal numbers on the indoor unit 4 Neatly arrange power wiring communications cable an...

Page 70: ... Indoor Unit The indoor unit case is con structed of a galvanized steel plate designed to recess in the ceiling and has a surface mounted concentric grille on the bottom of the unit Unit has four supply air outlets and one return air inlet The supply air outlet has four directional slot diffusers each equipped with an independent oscillating motorized guide vane to change airflow direc tion A guid...

Page 71: ...rocessor based di rect digital control algorithm that provides pre programmed field se lectable fixed or auto fan speeds in the Heating and Cooling modes The indoor fan has Low Med High Power Cool and Auto settings for Cooling mode and has Low Med High and Auto settings for Heating mode Auto setting adjusts the fan speed based on the difference between the controller set point and space temperatur...

Page 72: ...Air System No Number DI Digital Input ODU Outdoor Unit DFS Duct Free Split PCB Printed Circuit Board DO Digital output PCM Pre Coated Metal DPST Double Pole Single Throw switch PDI Power Distribution Indicator EEV Electronic Expansion Valve PI Power Input ELF Equivalent Length in Feet PR Prerequisite LEED Related ETL Electronic Testing Laboratories PVC Polyvinyl Chloride H M L High Medium Low SW o...

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Page 76: ... 11405 Old Roswell Road Alpharetta Georgia 30009 www lghvac com www lg dfs com DFS EM AC 001 US_014D02 20001747 ISO 9001 2008 LG ELECTRONICS INC LG Electronics Commercial Products Support 1 888 865 3026 USA Follow the prompts for commercial A C products ...

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