LG Electronics LD127HV4 Air Conditioner User Manual

SINGLE-ZONE

CEILING-CONCEALED

DUCTED SYSTEM

ENGINEERING MANUAL

Single-Zone Ceiling-Concealed

Ducted Heat Pump Systems

3/4 to 3 Tons

High Static

LH247HV (24,000 Btu/h)

High Static

LH367HV (36,000 Btu/h)

Low Static

LD097HV4 (9,000 Btu/h)

LD127HV4 (12,000 Btu/h)

For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.

PROPRIETARY DATA NOTICE

This 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.

A summary list of safety precautions is on page 4.

For more technical materials such as submittals, catalogs, installation,

owner’s, and service manuals, visit www.lghvac.com.

Due to our policy of continuous product innovation, some specications may change without notication.

INTRODUCTION | 3

Introduction

About LG Electronics, Inc.

LG Electronics, Inc. is a global leader and technology innovator

in consumer electronics, mobile communications, and home

appliances. LG Electronics, Inc. comprises five business units—

Home Entertainment, Mobile Communications, Air Conditioning,

Business Solutions, and Home Appliance. LG is one of the world’s

leading producers of flat panel televisions, audio and video products,

mobile handsets, air conditioners, and washing machines. LG’s

commercial air conditioning business unit was established in 1968

and has built its lineup of residential and commercial products to

include VRF, Multi F, duct-free split systems, packaged terminal air

conditioners (PTACs), and room air conditioners. In 2011, the air

conditioning and energy solutions business unit grew to include LED

lighting and solar products. For more information, visit www.lg-dfs.

com.

Duct-Free Split Systems

LG HVAC systems offer a range of solutions that are cost efficient,

quiet and attractive. Duct-Free Split systems are “split” into indoor

and outdoor units, and provide a smart alternative to both central

HVAC and window-mounted air conditioners. These inverter heat

pump systems are available in a variety of configurations to suit dif-

ferent cooling and heating situations. Installation by a qualified HVAC

contractor is safe and easy – little to no duct work or sheet metal is

required.

Inverter Systems

LG Single Zone Ducted air-source systems offer zoning without

the need for zone damper systems. The advanced controls of the

ceiling-concealed ducted system provide exceptional building dehu-

midification and temperature control, and can rapidly adapt system

operating parameters to the ever changing building load. Single-zone

DFS systems are easy to design, install, and maintain. The modular

design allows occupants to control their environmental condition,

providing individualized control of the set-point temperature and al-

lowing occupants to condition only the occupied zones.

Inverter variable-speed compressors are also measurably quieter

and consume less energy than those in conventional air condi-

tioners. The Inverter compressor ramps up or down to match the

required room capacity and maintain the comfort level. When the

selected temperature is reached, the inverter compressor oper-

ates at low speed to maintain that comfort level, thereby using less

energy.

Quality Commitment

LG is committed to the success of DFS projects. We provide industry

leading technical support during installation and commissioning. LG

offers a variety of classes designed for installers and servicers to

ensure that every system installation is completed successfully.

Classes are conducted at LG’s training centers and in field locations

at various times throughout the year and upon special request.

Due to our policy of continuous product innovation, some specications may change without notication.

4 | INTRODUCTION

Ceiling-Concealed Ducted System Engineering Manual

Due to our policy of continuous product innovation, some specications may change without notication.

Introduction

TABLE OF CONTENTS

About LG Electronics, Inc. ............................................................................................................................................................................................. 3

Duct-Free Split (DFS) Systems ...................................................................................................................................................................................... 3

Unit Nomenclature .......................................................................................................................................................................................................... 9

Ducted (High Static) System Data .......................................................................................................................................................................... 10-36

Product Features and Benets ................................................................................................................................................................................... 10

General Data ...............................................................................................................................................................................................................11

Electrical Data ............................................................................................................................................................................................................ 13

Dimensions ............................................................................................................................................................................................................ 14-19

Acoustic Data ........................................................................................................................................................................................................ 20-21

External Static Pressure ........................................................................................................................................................................................ 22-23

Refrigerant Flow Diagrams .................................................................................................................................................................................... 24-28

Wiring Diagrams .................................................................................................................................................................................................... 29-34

Accessories ........................................................................................................................................................................................................... 35-36

Performance Data .................................................................................................................................................................................................... 37-44

Cooling Capacity Tables ........................................................................................................................................................................................ 38-41

Heating Capacity Tables ........................................................................................................................................................................................ 42-43

Application Guidelines ............................................................................................................................................................................................ 45-61

Equipment Selection Procedure ............................................................................................................................................................................ 46-47

Building Ventilation Design Guide ......................................................................................................................................................................... 48-52

Placement Considerations ..................................................................................................................................................................................... 53-61

Refrigerant Piping Design & Layout Best Practices ............................................................................................................................................ 62-71

Design Guideline Summary ........................................................................................................................................................................................ 63

Selecting Field-Supplied Copper Tubing .................................................................................................................................................................... 64

Refrigerant Piping System Layout ......................................................................................................................................................................... 65-69

Piping Insulation ......................................................................................................................................................................................................... 70

Condensate Drain Piping ............................................................................................................................................................................................ 71

Electrical and Mechanical Specications ............................................................................................................................................................. 72-77

Wiring Connections ............................................................................................................................................................................................... 72-74

Mechanical Specications ..................................................................................................................................................................................... 76-77

Acronyms ...................................................................................................................................................................................................................... 78

TABLE OF SYMBOLS

DANGER

This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury.

This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury.

CAUTION

This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury.

Note:

This symbol indicates situations that may result in equipment or property damage accidents only.

This symbol indicates an action that should not be performed.

Multi F and Multi F MAX Heat Pump System Engineering Manual

INTRODUCTION

“Architectural Appeal” on page 6

Due to our policy of continuous product innovation, some specications may change without notication.

6 | INTRODUCTION

Ceiling-Concealed Ducted System Engineering Manual

Convergence of Technological Innovation with Flexibility and Style

ARCHITECTURAL APPEAL

Single-Zone Ceiling-Concealed

Ducted Systems

A ceiling-concealed ducted system provides a system designer an

edge to engineer a system with individual control, and design flex-

ibility with advanced controls. Ceiling-concealed ducted systems are

208-230V/60Hz/1PH systems available in nominal capacities of 3/4,

1, 2, and 3 tons, and are best suited for applications with zones that

require heating or cooling, such as residential, and small business

office buildings.

Benefits of Ceiling-Concealed Ducted Systems

• Inverter technology

• Low static available in 9,000 and 12,000 Btu/h; High static

available in 24,000, and 36,000 Btu/h capacities

• All-season use—heat pump models for both cooling and heat-

ing capabilities

• Operating ranges for 9,000 and 12,000 Btu/h low static outdoor

units of 0°F to +118°F (DB) for cooling (Cooling range can be

extended from 0°F down to -4°F using the Low Ambient Wind

Baffle Kit [sold separately]); -4°F to +64°F (WB) for heating

• Operating ranges for 9,000 and 12,000 Btu/h low static indoor

units of 57°F to 77°F (WB) for cooling; 59°F to 81°F (DB) for

heating

• Indoor unit temperature for 9,000 and 12,000 Btu/h of 65°F to

86°F (DB) for cooling; 61°F to 86°F (WB) for heating

• Operating ranges for 24,000 and 36,000 Btu/h high static

outdoor units of 5°F to +118°F (DB) for cooling; 0°F to +64°F

(WB) for heating

• Operating ranges for 24,000 and 36,000 Btu/h high static

indoor units of 57°F to 77°F (WB) for cooling; 59°F to 81°F

(DB) for heating

• Indoor unit temperature setting range for 24,000 and 36,000

Btu/h) of 65°F to 86°F (DB) for cooling; 61°F to 86°F (WB) for

heating

• Quiet operation inside and outside

Inverter Technology

Inverter variable-speed compressors are measurably quieter and

consume less energy than those in conventional air conditioners.

The Inverter compressor ramps up or down to match the required

room capacity and maintain the comfort level. When the

selected temperature is reached, the inverter compressor oper-

ates at low speed to maintain that comfort level, thereby using less

energy.

Adaptable and Flexible

Ceiling-concealed ducted systems allow cooling or heating for a

single room without the need for extensive remodeling. Long refrig-

erant piping lengths allow for extra design flexibility in indoor unit

installation. These units may be used for a number of residential or

commercial environments such as:

• Older homes

• New home construction

• Office buildings

• Restaurants

• Hospitals / Medical facilities

• Schools

• Nursing homes

• Retail establishments

• Houses of worship

Figure 1: Ceiling Concealed High Static Ducted System.

“Product Features and Benefits” on page 8

“Unit Nomenclature” on page 9

“General Data” on page 10

“Electrical Data” on page 13

“Dimensions” on page 14

“Acoustic Data” on page 20

“External Static Pressure” on page 22

“Refrigerant Flow Diagrams” on page 24

“Wiring Diagrams” on page 29

“Accessories” on page 35

PRODUCT DATA

Due to our policy of continuous product innovation, some specications may change without notication.

8 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

PRODUCT FEATURES AND BENEFITS

Ceiling-Concealed Ducted Systems

Single zone ceiling-concealed ducted systems are equipped with in-

verter components that offer superior load matching and long piping

installation. The product works for optimizing power consumption in

residential and small office buildings. Using a ducted indoor unit with

custom temperature controls allow for precise temperature settings

in each zone of the building. Ceiling-concealed ducted indoor units

allow flexibility in interior design.

Lower Sound Levels

When outdoor units operate fully loaded, they have one of the quiet-

est sound levels in the industry, operating as low as 47 dB(A). To

promote a quiet, comfortable environment, ceiling-concealed ducted

indoor units operate as low as 23 dB(A). LG customers often ask if

the outdoor unit is running after commissioning is complete.

All rotating components are soft-started by the controller using digi-

tally controlled inverters, which reduce undesirable noise caused by

fans and compressors cycling on and off.

Comfort Control at its Best

Tight temperature control through precise load matching. Unlike

traditional air conditioning control systems, which use thermostatic

controls to maintain room temperatures, LG inverters continuously

vary the indoor unit fan speed and refrigerant flow, indirectly provid-

ing lower and more consistent humidity levels in the conditioned

space. The longer the indoor coil temperature is below the dewpoint

of the room in conjunction with air movement across the coil, the

space humidity level will vary little, compared to technologies that

cycle fans and compressors on and off multiple times per hour. The

outdoor unit responds by varying the compressor speed and fan mo-

tors as needed to maintain system operating pressure. As a result,

ceiling-concealed ducted systems deliver 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 ceiling-concealed ducted out-

door unit to vary the compressor motor shaft speed and deliver an

appropriate amount of cooling to the indoor unit. Occupants remain

comfortable while utility costs are reduced.

Simplified Installation

The LG ceiling-concealed ducted system simplies and reduces

mechanical and control system design time. The designer no longer

has to be concerned with interconnecting chilled and condenser water

piping, complicated air distribution duct systems, matching and selecting

chillers, towers, pumps, coils, fans, air handlers, or Variable Air Volume

(VAV) boxes.

Operating Range

Ceiling-concealed ducted systems are available in 9,000 and 12,000

Btu/h capacities (low static), and in 24,000 and 36,000 Btu/h capaci-

ties (high static).

9,000 and 12,000 Btu/h Low Static Operating Ranges

• Operating ranges for outdoor units of 0°F to +118°F (DB) for

cooling (Cooling range can be extended from 0°F down to -4°F

using the Low Ambient Wind Baffle Kit [sold separately]); -4°F to

+64°F (WB) for heating.

• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;

59°F to 81°F (DB) for heating.

• Indoor unit temperature setting range of 65°F to 86°F (DB) for

cooling; 61°F to 86°F (WB) for heating.

24,000 and 36,000 High Static Operating Ranges

• Operating ranges for outdoor units of 5°F to +118°F (DB) for

cooling; 0°F to +64°F (WB) for heating.

• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;

59°F to 81°F (DB) for heating.

• Indoor unit temperature setting range of 65°F to 86°F (DB) for

cooling; 61°F to 86°F (WB) for heating

Heat Transfer Efficiency

Fin Design with GoldFin™ Coating

All ceiling-concealed ducted outdoor units are provided with large

surface coils made of copper tubes with louvered aluminum fins

designed to maximize unit operating efficiency over a wide range

of ambient conditions. Standard from the factory, the LG ceiling-

concealed ducted outdoor coil fin surface is coated with LG’s exclu-

sive GoldFin™ anti-corrosive coating designed to prevent natural

surface corrosion of the aluminum fins. This maintains heat transfer

properties of the coil for an extended time. A hydrophilic coating is

applied to the outdoor unit coil fin surface over the GoldFin coating.

This coating enhances the development of heavier water droplets

gathering on the fin surface. As a result, the droplets roll off the fin

surfaces, delaying the point when frost forms on the coil surface dur-

ing heating operation. This coating also makes it possible to easily

clean the outdoor unit coil using a mild soap.

Other Features

• Inverter (Variable Speed Compressor)

• Auto restart

• Auto operation

• Auto changeover

• Sleep mode

• Internal condensate pump included

• Precision Load Matching

• Follows AHRI 210/240

UNIT NOMENCLATURE

A 090 H

System Type:

Style:

SV = High Efficiency Inverter

VP = Gallery

YV = Premier

EV = Mega

V = Standard Inverter

T = Thermostat Compatible

Nominal Capacity

(Nominal cooling capacity in Btu/h):

Frame Type:

A: Art Cool™

S: Standard

C: Four-Way Ceiling-Cassette

D: Ceiling-Concealed Duct (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 4N

N: Indoor Unit

U: Outdoor Unit

No N or U: System

H = Heat Pump

Generation:

DUCTED | 9

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

10 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Outdoor Unit Model Indoor Unit Model Controller

Low Static

LUU097HV

LUU127HV

LDN097HV4

LDN127HV4

PQRCVCL0QW

High Static

LUU247HV LHN247HV PQRCVCL0QW

LUU367HV LHN367HV PQRCVCL0QW

The following table shows the available outdoor and indoor unit, along with the factory provided controller.

Table 1: Ceiling-Concealed Ducted System Pairing Table

GENERAL DATA

Ceiling Concealed Ducted Pairing Table

EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. This unit comes with a dry

helium charge.

This data is rated 0 ft above sea level, with 24.6 ft of refrigerant line per indoor unit and a 0 ft level differ-

ence between outdoor and indoor units.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb

(WB); and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).

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).

Power Input is rated at high speed.

All power wiring/communication cables from ODU to IDU are field supplied and are to be minimum 18

AWG, 4-conductor, stranded, shielded or unshielded (if shielded, must be grounded to chassis at ODU

only), and must comply with applicable local and national codes.

Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy

R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of

CAA.

Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the same

in both cooling and heating mode. These values can increase due to ambient conditions during opera-

tion.

Piping lengths are equivalent.

Cooling range can be extended from 0°F down to -4°F using the Low Ambient Wind Baffle Kit (sold

separately).

Type Single Zone Ceiling-Concealed Ducted (Low Static)

System (Model) (Indoor Unit / Outdoor Unit) LD097HV4 (LDN097HV4 / LUU097HV) LD127HV4 (LDN127HV4 / LUU127HV)

Cooling Capacity (Min/Rated/Max) (Btu/h)

3,600 ~ 9,000 ~ 9,900 4,640 ~ 11,600 ~ 12,760

Cooling Power Input

(kW)

0.20 ~ 0.71 ~ 0.89 0.26 ~ 0.9 ~ 1.13

EER (OD 95°F)

12.7 12.9

SEER

18.5 19.6

Heating Capacity (Min/Rated/Max) (Btu/h)

5,600 ~ 14,000 ~ 15,400 6,400 ~ 16,000 ~ 17,600

Heating Power Input

(kW)

0.26 ~ 1.43 ~ 1.80 0.37 ~ 1.29 ~ 1.63

COP (OD 47°F)

2.86 3.64

HSPF

10.3 10.5

Rated Low Heating Capacity (Btu/h)

Outdoor 17°F (WB)/Indoor 70°F (DB)

9,500 10,000

Low COP (OD 17°F)

2.54 2.7

Maximum Heating Capacity (Btu/h)

Outdoor 17°F (WB)/Indoor 70°F (DB)

11,900 (85%) 13,600 (85%)

Outdoor 5°F (WB)/Indoor 70°F (DB)

10,500 (75%) 12,000 (75%)

Outdoor -4°F (WB)/Indoor 70°F (DB)

8,960 (64%) 10,240 (64%)

Power Supply V, Ø, Hz

208-230 / 1 / 60

Outdoor Unit Operating Range

Cooling (°F DB)

0 - +118

Heating (°F WB)

-4 - +64 -4 - +64

Indoor Unit Operating Range

Cooling (°F WB)

57 - 77 57 - 77

Heating (°F DB)

59 - 81 59 - 81

Indoor Temperature Setting Range

Cooling (°F DB)

65 - 86

Heating (°F WB)

61 - 86

Unit Data

Refrigerant Type

R410A

Refrigerant Control

EEV

Indoor Unit Sound Pressure Level dB(A) (H/M/L)

30 / 26 / 23 31 / 28 / 27

Outdoor Unit Sound Pressure Level dB(A) (Cool/Heat)

47 / 51 49 / 52

Indoor Unit Net / Shipping Weight (lbs.)

38.6 / 45.2 50.7 / 59.5

Outdoor Unit Net / Shipping Weight (lbs.)

81.5 / 88.2 81.5 / 88.2

Power Wiring / Communications Cable (No. x AWG)

4 x 18 4 x 18

Compressor (Type x Qty.)

Twin Rotary x 1 Twin Rotary x 1

Dehumidification Rate (pts./hr.)

1.5 2.28

Fan

Indoor Unit Type x Qty.

Sirocco x 2 Sirocco x 3

Outdoor Unit Type x Qty.

Axial x 1 Axial x 1

Motor / Drive

Brushless Digitally Controlled / Direct

Airflow Rate

Indoor Unit (H / M / L [CFM])

318 / 247 / 194 353 / 300 / 247

Outdoor Unit (CFM)

988 988

Piping

Liquid (in.)

1/4

Vapor (in.)

3/8

Indoor Unit Condensate Drain O.D. / I.D. (in.)

1-1/4 / 1

Additional Refrigerant Charge (oz./ft.)

0.22

Maximum Pipe Length (ft.)

Piping Length

(no additional refrigerant, ft.)

24.6

Maximum Elevation Difference (ft.)

Table 2: Ceiling-Concealed Ducted (Low Static) System General Data.

GENERAL DATA / SPECIFICATIONS

DUCTED | 11

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Type Single Zone Ceiling-Concealed Ducted (High Static)

System (Model) (Indoor Unit / Outdoor Unit) LH247HV (LHN247HV / LUU247HV) LH367HV (LHN367HV / LUU367HV)

Cooling Capacity (Min/Rated/Max) (Btu/h)

9,700 ~ 24,000 ~ 26,700 16,000 ~ 36,000 ~ 41,400

Cooling Power Input

(kW)

2.00 2.91

EER (OD 95°F)

12.0 12.1

SEER

17.0 17.6

Heating Capacity (Min/Rated/Max) (Btu/h)

10,900 ~ 27,000 ~ 30,000 17,500 ~ 40,000 ~ 48,000

Heating Power Input

(kW)

2.28 3.36

COP (OD 47°F)

- -

HSPF

10.0 9.20

Power Supply V, Ø, Hz

208-230 / 1 / 60

Outdoor Unit Operating Range

Cooling (°F DB)

5 - 118

Heating (°F WB)

0 - 64

Indoor Unit Operating Range

Cooling (°F WB)

57 - 77

Heating (°F DB)

59 - 81

Indoor Temperature Setting Range

Cooling (°F)

65 - 86

Heating (°F)

61 - 86

Unit Data

Refrigerant Type

R410A

Refrigerant Control

EEV

Indoor Unit Sound Pressure Level ±3 dB(A) (H/M/L)

38 / 36 / 35 39 / 38 / 37

Outdoor Unit Sound Pressure Level ±3 dB(A) (Cool/Heat)

48 / 52 52 / 54

Indoor Unit Net / Shipping Weight (lbs.)

73 / 95 125 / 139

Outdoor Unit Net / Shipping Weight (lbs.)

133 / 146 203 / 227

Power Wiring / Communications Cable (No. x AWG)

4 x 18

Compressor (Type x Qty.)

Twin Rotary x 1

Fan

Indoor Unit Type x Qty.

Sirocco x 2

Outdoor Unit Type x Qty.

Propeller x 1 Propeller x 2

Motor / Drive

Brushless Digitally Controlled / Direct

Airflow Rate

Indoor Unit (Max. / H / M / L [CFM])

688 / 618 / 530 1,130 / 953 / 706

Outdoor Unit (CFM)

2,048 1,942 x 2

Factory Set (High) External Static Pressure (in. wg)

0.39

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.)

24.6

Maximum Elevation Difference (ft.)

98.4

Table 3: Ceiling-Concealed Ducted (High Static) System General Data.

GENERAL DATA / SPECIFICATIONS

EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. This unit comes with a dry

helium charge.

This data is rated 0 ft above sea level, with 24.6 ft of refrigerant line per indoor unit and a 0 ft level differ-

ence between outdoor and indoor units.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb

(WB); and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).

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).

Power Input is rated at high speed.

All power wiring/communication cables from ODU to IDU are field supplied and are to be minimum 18

AWG, 4-conductor, stranded, shielded or unshielded (if shielded, must be grounded to chassis at ODU

only), and must comply with applicable local and national codes.

Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy

R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of

CAA.

Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the same

in both cooling and heating mode. These values can increase due to ambient conditions during opera-

tion.

Piping lengths are equivalent.

Due to our policy of continuous product innovation, some specications may change without notication.

12 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

ELECTRICAL DATA

Nominal

Tons

Unit Model No. Hertz Voltage

Voltage

Range

(Min. to Max.)

MCA MOP

Compressor

Quantity

Compressor

Motor RLA

(Cooling)

Condenser Fan Motor(s)

Condenser

Fan Quantity.

Condenser Fan

Motor FLA

Low Static

3/4 LUU097HV

60 208 - 230 187 - 253

11.9

15 1 9.0 1 0.25

1 LUU127HV 12.3

High Static

2 LUU247HV

60 208 - 230 187 - 253

18.1 30

13.5 1 0.6

3 LUU367HV 24.5 40 18.0 2 0.6 x 2

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 follows:

(Largest motor FLA x 2.25) + (Sum of other motor FLA) rounded down

to the nearest standard fuse size.

Table 4: Electrical Data.

Electrical Data

DUCTED | 13

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Figure 2: LUU097HV, LUU127HV Outdoor Unit Dimensions.

OUTDOOR UNIT DIMENSIONS

LUU097HV, LUU127HV

4-3/32 22-3/16

13/16

12-31/32

13-29/32

13/16

4 Holes for Anchor Bolts (M 13/32)

3D View

1-3/16 11-11/32 31/32

2-9/16

17-11/16

15/16

21-15/32

30-5/16

2-23/32

5/8

2-3/32 5-21/32

17-11/1615/16

4-25/32

Side View

(Valve Cover Removed)

8-25/32

2-3/4

4-7/16 1-11/32

1-7/32

1-29/32

2-3/32

1-13/32

1-1/16

6-5/8

7-1/2

15-11/16

19-11/16

4 - LD.

Ф25/32 Holes for drain connection

9-29/32

Intake air temperature sensor cover

Handle

Conduit

Liquid pipe connection

Vapor pipe connection

Control cover & service valve cover

Air outlet

No. Part Name

[Unit: inch]

Due to our policy of continuous product innovation, some specications may change without notication.

14 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Figure 3: LUU247HV Outdoor Unit Dimensions.

OUTDOOR UNIT DIMENSIONS

LUU247HV

DUCTED | 15

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Job Name/Location:

Tag #:

Date:

PO No.:

Single Zone High Static Duct

Page 2 of 3DFS‐SB‐AM‐001‐US 013E28

For continual product development, LG reserves the right to change specifications without notice.

Outdoor Unit

(

ODU

)

‐ LUU247HV

Figure 4: LUU367HV Outdoor Unit Dimensions.

OUTDOOR UNIT DIMENSIONS

LUU367HV

Job Name/Location:

Tag #:

Date:

PO No.:

Single Zone High Static Duct

Page 2 of 3DFS‐SB‐AM‐002‐US 013E28

For continual product development, LG reserves the right to change specifications w ithout notice.

Outdoor Unit

(

ODU

)

‐ LUU367HV

Due to our policy of continuous product innovation, some specications may change without notication.

16 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

INDOOR UNIT DIMENSIONS

LDN097HV4, LDN127HV4

Figure 5: LDN097HV4, LDN127HV4 Indoor Unit Dimensions.

DUCTED | 17

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

INDOOR UNIT DIMENSIONS

Figure 6: LHN247HV Indoor Unit Dimensions.

Job Name/Location:

Tag #:

Date:

PO N o.:

Single Zone High Static Duct

Page 3 of 3DFS‐SB‐AM‐001‐US 013E28

For continual product development, LG reserves the right to change specifications without notice.

Indoor Unit

(

IDU

)

‐ LHN247HV

LHN247HV

Due to our policy of continuous product innovation, some specications may change without notication.

18 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Figure 7: LHN367HV Indoor Unit Dimensions.

INDOOR UNIT DIMENSIONS

LHN367HV

Job Name/Location:

Tag #:

Date:

PO No.:

Single Zone High Static Duct

Page 3 of 3DFS‐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. A l l rights reserved. “LG Life’s Good” is a registered trademark of LG Corp. /www.lghvac.com

Indoor Unit

(

IDU

)

‐ LHN367HV

DUCTED | 19

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

ACOUSTIC DATA

Outdoor Units

• Measurements taken with no attenuation and units operating at full load normal

operating condition.

• Sound level will vary depending on a range of factors such as construction (acoustic

absorption coefficient) of particular area in which the equipment is installed.

• Sound power levels are measured in dB(A)±3.

• Tested in anechoic chamber per ISO Standard 3745.

Figure 8: Ceiling-Concealed Ducted Outdoor Unit

Sound Pressure Level Measurement Location.

3.3 ft.

4.9 ft.

Table 5: Ceiling-Concealed Ducted Outdoor Unit Sound Pressure Levels (dB[A]).

Model

Sound Pressure Levels (dB[A])

Cooling Heating

Low Static

LUU097HV 47 51

LUU127HV 49 52

High Static

LUU247HV 48 52

LUU367HV 52 54

Figure 9: Ceiling-Concealed Ducted Outdoor Unit

Sound Pressure Level Diagrams.

LUU187HV, LUU247HV LUU367HV, LUU427HV

Octave Band Center Frequency (Hz)

Octave Band Sound Pressure Level (0dB = 20μPa)

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)

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

▲ Cooling

Heating

▲ Cooling

Heating

LUU247HV

LUU367HV

LUU097HV LUU127HV

LUU187HV, LUU247HV LUU367HV, LUU427HV

Octave Band Center Frequency (Hz)

Octave Band Sound Pressure Level (0dB = 20μPa)

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)

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

▲ Cooling

Heating

▲ Cooling

Heating

Due to our policy of continuous product innovation, some specications may change without notication.

20 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Model

Sound Pressure Levels (dB[A])

H M L

Low Static

LDN097HV4 30 26 23

LDN127HV4 31 28 27

High Static

LHN247HV 38 36 35

LHN367HV 39 38 37

Table 6: Ceiling-Concealed Ducted Indoor Unit Sound

Pressure Levels (dB[A]).

Figure 10: Indoor Unit Sound Pressure Level Measurement Location.

Figure 11: Ceiling-Concealed Ducted Indoor Unit Sound Pressure Level

Diagrams.

• Measurements taken with no attenuation and units operating at full

load normal operating condition.

• Sound level will vary depending on a range of factors such as

construction (acoustic absorption coefficient) of particular area in

which the equipment is installed.

• Sound power levels are measured in dB(A)±3.

• Tested in anechoic chamber per ISO Standard 3745.

4.9 ft.

6.6 ft.

3.3 ft.

DUCT

DISCHARG

UCTION

DUCT

Octave Band Sound Pressure Level (0dB = 20μPa)

Approximate

Hearing

Threshold

Octave Band Center Frequency (Hz)

Octave Band Sound Pressure Level (0dB = 20μPa)

63 125 250 500 1000 2000 4000 8000

Octave Band Center Frequency (Hz)

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

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

LHN247HV LHN367HV

Indoor Units

ACOUSTIC DATA

Octave Band Center Frequency (Hz)

Octave Band Sound Pressure Level (0dB = 20μPa)

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)

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

LDN097HV4LDN127HV4

Octave Band Sound Pressure Level (0dB = 20μPa)

Approximate

Hearing

Threshold

Octave Band Center Frequency (Hz)

Octave Band Sound Pressure Level (0dB = 20μPa)

63 125 250 500 1000 2000 4000 8000

Octave Band Center Frequency (Hz)

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

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

LHN247HV LHN367HV

DUCTED | 21

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

EXTERNAL STATIC PRESSURE

Table 7: Ceiling-Concealed Ducted (Low Static) Indoor Unit External Static Pressure Setting Values Table.

• To get the desired air flow and external static pressure combination, use the setting value from the table. Using a setting value other

than that listed in the table will not provide the desired combination.

• Table data is based at 230V. Air flow rate varies according to voltage fluctuation.

Static Pressure (in. wg) 0.1 0.15 0.23 0.31 0.39 0.47 0.55 0.60 0.62 0.70 0.78

Model No. / Nominal Capacity

of System (Btu/h)

Airflow Rate / CFM Setting Value (in. wg)

LHN247HV

24,000

High 688 90 97 108 119 126 134 143 146 149 157 159

Mid 618 86 93 105 115 123 131 140 143 146 153 156

Low 530 82 90 102 112 120 128 137 140 143 150 153

LHN367HV

36,000

High 1,130 - 96 103 109 115 120 126 129 - - -

Mid 953 - 85 96 102 109 115 121 124 - - -

Low 706 - 76 85 95 100 107 113 116 - - -

Indoor Units

Table 8: Ceiling-Concealed Ducted (High Static) Indoor Unit External Static Pressure Setting Values Table.

Static Pressure (in. wg) 0.0 0.04 0.08 0.12 0.16 0.20

Model No. / Nominal Capacity

of System (Btu/h)

Airflow Rate / CFM Setting Value (in. wg)

LDN097HV4

9,000

High 318 98 103 108 116 123 130

Mid 247 82 88 94 102 110 118

Low 194 69 76 83 91 99 109

LDN127HV4

12,000

High 353 95 99 104 109 116 124

Mid 300 86 91 96 101 108 116

Low 247 78 82 87 93 100 108

Due to our policy of continuous product innovation, some specications may change without notication.

22 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

EXTERNAL STATIC PRESSURE

Indoor Units

Setting the External Static Pressure on the Remote Controller

Use this function to set the wind strength for each airflow level.

TEMP

FAN

SPEED

OPER

MODE

To access the controller set mode, press the

and buttons simultaneously

for >three (3)

* External Static Pressure Code: 03

Select the desired air flow rate with the

button.

Select the desired air flow rate value with

the temperature up), down) button.

* External Static Pressure value range: 0~255

- External Static Pressure value will be displayed

at the upper right-hand section of the screen.

Press the button to save / set the chosen

External Static Pressure value.

To deactivate the controller set mode, press the

and buttons simultaneously for > three (3) seconds.

- If there is no input (no buttons pressed) for

more than 25 seconds, the controller set mode

will automatically deactivate.

OPER

MODE

FAN

SPEED

OPER

MODE

seconds.

(Choose from SLo

→Lo→Med→Hi→Po

• The external static pressure must be set by a trained service provider, and it must be set correctly. If the external static pressure is

set incorrectly, the product may malfunction.

• Do not alter the external static pressure value that corresponds to each airflow level.

• External static pressure values vary according to the model.

• When the airflow rate is increased to a higher value, during the external static value setup, the previous airflow value will be stored in

the system memory. (External static pressure values are saved to system memory before the changes are implemented).

DUCTED | 23

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM

LUU097HV and LUU127HV

Figure 12: LUU097HV and LUU127HV Ceiling-Concealed Ducted (Low Static) Outdoor Unit Refrigerant Flow Diagram.

Refrigerant Flow

Cooling

Heating

High

Pressure

Sensor

4 way

Valve

Discharge

Temperature

Thermistor

Suction

Temperature

Thermistor

Inverter

Compressor

Electronic

Expansion

Valve

Strainer Strainer

Condenser Out

Temperature

Thermistor

Inlet Air

Temperature

Thermistor

1/4

Flare Connection

3/8

Flare Connection

Condensing

Temperature

Thermistor

Description PCB Connector

Condenser Inlet Temperature Thermistor CN-AIR

Condenser Outlet Temperature Thermistor CN-C_PIPE

Discharge Temperature Thermistor CN-DISCHARGE

Suction Temperature Thermistor CN-SUCTION

Condensing Temperature Thermistor CN-MID

High Pressure Sensor CN-H_PRESSURE

Electronic Expansion Valve CN-EEV_A

Table 9: LUU097HV and LUU127HV Ceiling-Concealed Ducted (Low Static) Outdoor Unit Thermistor Details.

Due to our policy of continuous product innovation, some specications may change without notication.

24 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

INDOOR UNIT REFRIGERANT FLOW DIAGRAM

Figure 13: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Refrigerant Flow Diagram.

LDN097HV4

Indoor Unit

: Cooling

: Heating

Sirocco Fan

Indoor Air

Temperature

Thermistor

Evaporator

Outlet

Temperature

Thermistor

Evaporator

Inlet

Temperature

Thermistor

Table 10: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No. Vapor (inch) Liquid (inch)

LDN097HV4 3/8 1/4

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

Table 11: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Thermistor Details.

DUCTED | 25

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

INDOOR UNIT REFRIGERANT FLOW DIAGRAM

LDN127HV4

Figure 14: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Flow Diagram.

Indoor Unit

: Cooling

: Heating

Sirocco Fan

Indoor Air

Temperature

Thermistor

Evaporator

Outlet

Temperature

Thermistor

Evaporator

Inlet

Temperature

Thermistor

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

Table 12: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No. Vapor (inch) Liquid (inch)

LDN127HV4 3/8 1/4

Table 13: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Thermistor Details.

Due to our policy of continuous product innovation, some specications may change without notication.

26 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM

LUU247HV and LUU367HV

Refrigerant Flow

Cooling

Heating

High Pressure

Sensor

4 way

36k/42k model only

Valve

Discharge

Temperature

Thermistor

Suction

Temperature

Fusible

Plug

Thermistor

Accumulator

Inverter

Compressor

Strainer Strainer

Condenser Out

Temperature

Thermistor

Outdoor Ambient Air

Temperature

Thermistor

Ø3/8

Flare Connection

Ø5/8

Flare Connection

Condensing

Temperature

Thermistor

Electronic

Expansion Valve

Liquid Side

Piping

Vapor Side

Piping

SVC

Figure 15: LUU247HV and LUU367HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Refrigerant Flow Diagram.

Description (Based on Cooling Mode)

PCB Connector

LUU247HV LUU367HV

Suction Temperature Thermistor

CN-TH3 CN-TH3

Discharge Temperature Thermistor

Condenser Outlet Temperature Thermistor

CN-TH2 CN-TH2

Outdoor Ambient Air Temperature Thermistor

Condenser Inlet Temperature Thermistor CN-TH4 CN-TH4

Pressure Sensor CN-TH1 P-SENSOR(H)

Table 14: LUU247HV and LUU367HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Thermistor Details.

DUCTED | 27

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

INDOOR UNIT REFRIGERANT FLOW DIAGRAM

Figure 16: LHN247HV and LHN367HV Ceiling-Concealed Ducted (High Static) Indoor Unit Refrigerant Flow Diagram.

Table 15: LUU247HV and LHN367HV Ceiling-Concealed Ducted (High Static) Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No. Vapor (inch) Liquid (inch)

LHN247HV

5/8 3/8

LHN367HV

Table 16: LUU247HV and LHN367HV Ceiling-Concealed Ducted (High Static) 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

LHN247HV and LHN367HV

Sirocco Fan

Heat Exchanger

Vapor Pipe Connection Port

(Flare Connection)

Liquid Pipe Connection Port

(Flare Connection)

Cooling

Heating

Evaporator Outlet

Temperature

Thermistor

Evaporator Inlet

Temperature Thermistor

Indoor Air Temperature

Thermistor

Due to our policy of continuous product innovation, some specications may change without notication.

28 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

OUTDOOR UNIT WIRING DIAGRAM

LUU097HV and LUU127HV

Figure 17: LUU097HV and LUU127HV Ceiling-Concealed (Low Static) Ducted Outdoor Unit Wiring Diagram.

DUCTED | 29

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

INDOOR UNIT WIRING DIAGRAM

LDN097HV4, LDN127HV4

Figure 18: LDN097HV4 and LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Wiring Diagram.

Due to our policy of continuous product innovation, some specications may change without notication.

30 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

OUTDOOR UNIT WIRING DIAGRAM

Figure 19: LUU247HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Wiring Diagram.

LUU247HV

DUCTED | 31

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Figure 20: LUU367HV Ceiling-Concealed Ducted (High Static) Outdoor Unit Wiring Diagram.

OUTDOOR UNIT WIRING DIAGRAM

LUU367HV

Due to our policy of continuous product innovation, some specications may change without notication.

32 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

INDOOR UNIT WIRING DIAGRAM

LHN247HV

Figure 21: LHN247HV Ceiling-Concealed Ducted (High Static) Indoor Unit Wiring Diagram.

DUCTED | 33

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

LHN367HV

INDOOR UNIT WIRING DIAGRAM

Figure 22: LHN367HV Ceiling-Concealed Ducted (High Static) Indoor Unit Wiring Diagram.

Due to our policy of continuous product innovation, some specications may change without notication.

34 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Table 17: Indoor Units—Functions, Controls and Options.

Indoor Unit Type

Ceiling Concealed Ducted

(Low Static)

Ceiling Concealed Ducted

(High Static)

Air-

ow

Air supply outlets

1 2

Airflow steps (fan/cool/heat)

3 / 3 / 3 3 / 3 / 3

Washable anti-fungal

√ √

Operation

Drain pump

√ √

E.S.P. control

√ √

Hot Start

√ √

Self diagnostics

√ √

Soft Dry (dehumidification)

√ √

Auto changeover

√ √

Auto restart

√ √

Child lock

o o

Group control – Requires the use of one Group Control Cable Kit

(PZCWRCG3) for every additional indoor unit

o o

Sleep mode

√ √

Timer (on/off)

√ √

Weekly schedule

√ √

Two thermistor control

o o

Controllers

7-Day programmable controller

o o

Simple wired remote controller

√ √

Wireless LCD remote control

Dry contact

o o

Dry contact (temperature setting)

o o

Central control (LGAP)

√ √

Primary washable filters.

Requires wired zone controller.

√ = Standard feature

o = Unit option

ACCESSORIES

Functions, Controls, and Options

Table 18: Ceiling-Concealed Ducted Indoor Unit Accessories Overview.

Model No. Description

ZLABGP01A Low Ambient Wind Baffle for Low Static Ducted Indoor Units

ZFBXBG01A High Efficiency Filter Box for High Static Ducted Indoor Units

ZFBXD201A Dynamic V8 2VL Low Profile Air Cleaner for High Static Ducted Indoor Units

ZPLMV201A Dynamic 2VL Air Cleaner Low Profile Return Air Plenum for High Static Ducted Indoor Units

ZFBXD402A Dynamic V8 4VL Low Profile Air Cleaner for High Static Ducted Indoor Units

ZPLMV402A Dynamic 4VL Air Cleaner Low Profile Return Air Plenum for High Static Ducted Indoor Units

ZFLT1301A 4-Pack Dynamic V8 VL Air Cleaner Replacement Filter Pads for High Static Ducted Indoor Units

ZFLT1302A 24-Pack Dynamic V8 VL Air Cleaner Replacement Filter Pads for High Static Ducted Indoor Units

ZGRLRA01A Dynamic V8 Air Cleaner Louvered Return Air Grille (one per plenum) for High Static Ducted Indoor Units

ZGRLRA02A Dynamic V8 Air Cleaner Egg Crate Return Air Grille (one per plenum) for High Static Ducted Indoor Units

DUCTED | 35

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

• Actual inverter compressor speed

• Target inverter compressor speed

• Actual outdoor fan speed

• Target outdoor unit fan speed

• Actual superheat

• Inverter compressor current value

• Outdoor air temperature

• Actual high pressure/saturation temperature

• Actual low pressure/saturation temperature

• Suction temperature

• Inverter compressor discharge temperature

• Outdoor coil pipe temperature

• Liquid line pipe temperature

• Inverter compressor operation indicator

light

• Four-way reversing valve operation

indicator light

• Pressure graph showing actual low pres-

sure and actual high pressure levels

• Error code display

• Operating mode indicator

• Total number of connected indoor units (for

multi zone systems)

• Communication indicator lights

• Unit error code

• Indoor unit capacity

• Indoor unit operating mode

• Indoor unit fan speed

• Indoor unit room temperature

• Indoor unit inlet pipe temperature

• Indoor unit outlet pipe temperature

LG Monitoring View (LGMV) Diagnostic Software and Cable

LGMV software allows the service technician or commissioning agent to connect a computer

USB port to the outdoor unit main printed circuit board (PCB) using an accessory cable with-

out the need for 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 values to imperial values.

3. Making Data: Recording of real time data to a separate file created to be stored on

the user’s computer.

4. Loading Data: Recorded data from a saved “.CSV” file can be loaded to create an

LGMV session.

5. Electrical Data: The lower half of main screen is changed to show the following:

• Inverter compressor

- Amps

- Volts

- Power Hz

- Inverter control board fan Hz

The software is available in a high version with all of the features listed above. The low version has all features as the high version without

Target High Pressure and Target Low Pressure values shown on main screen.

In lieu of connecting to the ODU, user has the option to connect to IDU with the use of a USB to RS-485 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:

• CPU: Pentium

IV 1.6 GHz

• Operating System: Windows

NT/2000/XP/Vista

• Main Memory: 256 MB

• Hard Disk: 600 MB when operating

• Web Browser: Internet Explorer

5.0

Figure 23: MV Diagnostic Screen

ACCESSORIES

LGMV Diagnostic Software

Due to our policy of continuous product innovation, some specications may change without notication.

36 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

“Cooling Capacity Data” on page 38

“Heating Capacity Data” on page 42

PERFORMANCE DATA

Cooling Capacity Tables

TC = Total Capacity (kBtu/h).

SHC: Sensible Heat Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.

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).

Cooling range can be extended from 0°F down to -4°F using the Low Ambient Wind Baffle Kit (sold

separately).

The shaded table rows indicate reference data. When operating at this temperature, these values can

be different if the system is not running consistently.

Due to our policy of continuous product innovation, some specications may change without notication.

38 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Table 19: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table.

Model No. /

Nominal Capacity

(Btu/h)

Outdoor

Air Temp.

(°F DB)

Indoor Air Temp. °F DB / °F WB

68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75

TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

LD097HV4 /

9,000

-4 8.85 6.84 0.42 9.40 7.23 0.44 9.95 7.00 0.45 10.34 7.15 0.46 11.05 7.21 0.47 11.60 7.34 0.47

0 8.84 6.88 0.42 9.39 7.27 0.44 9.94 7.04 0.46 10.34 7.19 0.46 11.04 7.25 0.47 11.59 7.39 0.48

5 8.84 6.94 0.43 9.38 7.33 0.45 9.93 7.10 0.46 10.33 7.25 0.47 11.03 7.31 0.48 11.58 7.45 0.49

10 8.83 7.00 0.44 9.38 7.39 0.45 9.93 7.16 0.47 10.32 7.31 0.48 11.02 7.37 0.48 11.57 7.51 0.49

15 8.82 7.05 0.44 9.37 7.45 0.46 9.92 7.21 0.48 10.31 7.37 0.48 11.01 7.43 0.49 11.56 7.57 0.50

20 8.82 7.11 0.45 9.36 7.51 0.47 9.91 7.27 0.48 10.31 7.42 0.49 11.01 7.49 0.50 11.55 7.63 0.51

25 8.81 7.16 0.46 9.36 7.57 0.47 9.90 7.33 0.49 10.30 7.48 0.50 11.00 7.54 0.51 11.54 7.69 0.52

30 8.80 7.22 0.46 9.35 7.63 0.48 9.90 7.38 0.50 10.29 7.54 0.50 10.99 7.60 0.51 11.54 7.75 0.52

35 8.80 7.27 0.47 9.34 7.68 0.49 9.89 7.44 0.50 10.28 7.60 0.51 10.98 7.66 0.52 11.53 7.81 0.53

40 8.79 7.33 0.48 9.33 7.74 0.49 9.88 7.50 0.51 10.27 7.65 0.52 10.97 7.72 0.53 11.52 7.86 0.54

45 8.78 7.38 0.48 9.33 7.80 0.50 9.87 7.55 0.52 10.27 7.71 0.52 10.96 7.78 0.53 11.51 7.92 0.55

50 8.78 7.44 0.49 9.32 7.86 0.51 9.87 7.61 0.53 10.26 7.77 0.53 10.96 7.83 0.54 11.50 7.98 0.55

55 8.77 7.49 0.50 9.31 7.91 0.51 9.86 7.66 0.53 10.25 7.82 0.54 10.95 7.89 0.55 11.49 8.04 0.56

60 8.76 7.55 0.50 9.31 7.97 0.52 9.85 7.72 0.54 10.24 7.88 0.55 10.94 7.95 0.56 11.48 8.10 0.57

65 8.76 7.60 0.51 9.30 8.03 0.53 9.84 7.77 0.55 10.24 7.94 0.55 10.93 8.00 0.56 11.47 8.16 0.57

70 8.75 7.65 0.51 9.29 8.09 0.53 9.84 7.83 0.55 10.23 7.99 0.56 10.92 8.06 0.57 11.47 8.21 0.58

75 8.54 7.53 0.54 9.08 7.96 0.56 9.62 7.72 0.58 10.01 7.89 0.59 10.71 7.96 0.60 11.25 8.12 0.61

80 8.33 7.40 0.57 8.87 7.84 0.59 9.41 7.61 0.61 9.80 7.78 0.62 10.49 7.86 0.63 11.03 8.03 0.64

85 8.12 7.27 0.60 8.66 7.71 0.62 9.20 7.49 0.64 9.59 7.66 0.65 10.28 7.76 0.66 10.82 7.92 0.68

90 7.91 7.13 0.63 8.45

7.57 0.65 8.99 7.37 0.67 9.37 7.55 0.68 10.06 7.65 0.69 10.60 7.82 0.71

95 7.68 7.05 0.65 8.22 7.50 0.68 8.75 7.31 0.70 9.00 7.38 0.71 9.83 7.61 0.72 10.36 7.79 0.74

100 7.50 6.86 0.68 8.03 7.31 0.71 8.57 7.14 0.73 8.88 7.27 0.74 9.64 7.44 0.75 10.17 7.63 0.77

105 7.31 6.68 0.71 7.84 7.13 0.73 8.38 6.96 0.76 8.77 7.15 0.77 9.45 7.28 0.78 9.99 7.47 0.80

110 7.12 6.45 0.74 7.66 6.89 0.76 8.19 6.75 0.79 8.58 6.94 0.80 9.26 7.07 0.82 9.80 7.26 0.83

115 6.94 6.25 0.76 7.47 6.70 0.79 8.01 6.57 0.82 8.39 6.76 0.83 9.08 6.90 0.85 9.61 7.10 0.86

118 6.82 6.21 0.78 7.36 6.66 0.81 7.89 6.54 0.84 8.28 6.73 0.85 8.96 6.88 0.86 9.50 7.08 0.88

122 6.79 6.19 0.80 7.32 6.65 0.83 7.86 6.52 0.86 8.24 6.72 0.87 8.93 6.87 0.89 9.46 7.07 0.91

PERFORMANCE DATA

Cooling Capacity Tables

DUCTED | 39

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Table 20: LD127HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table.

Model No. /

Nominal Capacity

(Btu/h)

Outdoor

Air Temp.

(°F DB)

Indoor Air Temp. °F DB / °F WB

68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75

TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

LD127HV4 /

12,000

-4 11.40 9.03 0.53 12.11 9.54 0.55 12.82 9.24 0.57 13.33 9.43 0.58 14.24 9.51 0.59 14.95 9.69 0.60

0 11.40 9.08 0.54 12.11 9.60 0.56 12.81 9.29 0.58 13.33 9.49 0.58 14.23 9.57 0.60 14.94 9.75 0.61

5 11.39 9.17 0.55 12.10 9.68 0.57 12.80 9.38 0.59 13.31 9.57 0.59 14.22 9.65 0.61 14.93 9.84 0.62

10 11.38 9.24 0.56 12.09 9.76 0.58 12.79 9.45 0.60 13.30 9.65 0.60 14.21 9.73 0.61 14.91 9.92 0.63

15 11.37 9.31 0.56 12.08 9.84 0.58 12.78 9.53 0.61 13.29 9.73 0.61 14.20 9.81 0.62 14.90 9.99 0.64

20 11.36 9.39 0.57 12.07 9.91 0.59 12.77 9.60 0.61 13.28 9.80 0.62 14.19 9.88 0.63 14.89 10.07 0.65

25 11.35 9.46 0.58 12.06 9.99 0.60 12.76 9.67 0.62 13.27 9.88 0.63 14.17 9.96 0.64 14.88 10.15 0.65

30 11.35 9.53 0.59 12.05 10.07 0.61 12.75 9.75 0.63 13.26 9.95 0.64 14.16 10.04 0.65 14.87 10.23 0.66

35 11.34 9.60 0.60 12.04 10.14 0.62 12.74 9.82 0.64 13.25 10.03 0.65 14.15 10.11 0.66 14.86 10.31 0.67

40 11.33 9.68 0.60 12.03 10.22 0.63 12.74 9.90 0.65 13.24 10.10 0.66 14.14 10.19 0.67 14.85 10.38 0.68

45 11.32 9.75 0.61 12.02 10.30 0.63 12.73 9.97 0.66 13.23 10.18 0.66 14.13 10.27 0.68 14.83 10.46 0.69

50 11.31 9.82 0.62 12.01 10.37 0.64 12.72 10.04 0.67 13.22 10.26 0.67 14.12 10.34 0.69 14.82 10.54 0.70

55 11.30 9.89 0.63 12.00 10.45 0.65 12.71 10.12 0.67 13.21 10.33 0.68 14.11 10.42 0.70 14.81 10.61 0.71

60 11.29 9.96 0.64 11.99 10.53 0.66 12.70 10.19 0.68 13.20 10.41 0.69 14.10 10.49 0.70 14.80 10.69 0.72

65 11.28 10.04 0.64 11.99 10.60 0.67 12.69 10.26 0.69 13.19 10.48 0.70 14.09 10.57 0.71 14.79 10.77 0.73

70 11.28 10.11 0.65 11.98 10.68 0.68 12.68 10.34 0.70 13.18 10.56 0.71 14.08 10.64 0.72 14.78 10.85 0.74

75 11.00 9.94 0.69 11.70 10.51 0.71 12.40 10.19 0.74 12.91 10.41 0.75 13.80 10.52 0.76 14.50 10.72 0.78

80 10.73 9.77 0.72 11.43 10.35 0.75 12.13 10.04 0.78 12.63 10.27 0.79 13.52 10.38 0.80 14.22 10.60 0.82

85 10.46 9.59 0.76 11.16 10.17 0.79 11.85 9.89 0.81 12.36 10.12 0.82 13.24 10.24 0.84 13.94 10.46 0.86

90 10.20 9.41 0.79 10.89

10.00 0.82 11.58 9.73 0.85 12.08 9.96 0.86 12.97 10.10 0.88 13.66 10.33 0.90

95 9.90 9.31 0.83 10.59 9.91 0.86 11.28 9.65 0.89 11.60 9.74 0.90 12.66 10.05 0.92 13.35 10.28 0.94

100 9.66 9.06 0.86 10.35 9.66 0.89 11.04 9.42 0.93 11.45 9.59 0.94 12.42 9.83 0.96 13.11 10.07 0.98

105 9.42 8.81 0.90 10.11 9.41 0.93 10.80 9.19 0.97 11.30 9.44 0.98 12.18 9.61 0.99 12.87 9.86 1.01

110 9.18 8.51 0.93 9.87 9.10 0.97 10.56 8.91 1.00 11.06 9.16 1.01 11.94 9.34 1.03 12.63 9.59 1.05

115 8.94 8.26 0.97 9.63 8.85 1.00 10.32 8.67 1.04 10.82 8.93 1.05 11.70 9.12 1.07 12.39 9.37 1.09

118 8.79 8.20 0.99 9.48 8.79 1.03 10.17 8.63 1.06 10.67 8.89 1.08 11.55 9.09 1.10 12.24 9.35 1.12

122 8.75 8.18 1.02 9.44 8.77 1.06 10.13 8.61 1.09 10.62 8.87 1.11 11.51 9.08 1.13 12.20 9.34 1.15

TC = Total Capacity (kBtu/h).

SHC: Sensible Heat Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.

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).

Cooling range can be extended from 0°F down to -4°F using the Low Ambient Wind Baffle Kit (sold

separately).

The shaded table rows indicate reference data. When operating at this temperature, these values can

be different if the system is not running consistently.

Table 21: LH247HV Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table.

Model No. /

Nominal Capacity

(Btu/h)

Outdoor

Air Temp.

(°F DB)

Indoor Air Temp. °F DB / °F WB

68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75

TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

LH247HV

24,000

5 23.77 19.04 0.80 25.25 20.11 1.08 26.73 20.70 1.17 27.79 19.88 1.19 29.68 20.05 1.19 31.15 20.43 1.19

10 23.74 19.18 0.82 25.21 20.26 1.11 26.69 20.85 1.20 27.75 20.03 1.22 29.64 20.20 1.22 31.11 20.58 1.22

15 23.70 19.32 0.84 25.18 20.41 1.14 26.65 21.00 1.24 27.71 20.17 1.25 29.59 20.34 1.26 31.07 20.73 1.25

20 23.67 19.45 0.86 25.14 20.55 1.17 26.61 21.15 1.27 27.67 20.32 1.29 29.55 20.49 1.29 31.02 20.88 1.29

25 23.64 19.59 0.89 25.10 20.70 1.20 26.57 21.30 1.30 27.63 20.46 1.32 29.51 20.63 1.32 30.98 21.02 1.32

30 23.60 19.73 0.91 25.07 20.84 1.23 26.53 21.45 1.33 27.59 20.60 1.35 29.47 20.78 1.36 30.93 21.17 1.35

35 23.57 19.87 0.93 25.03 20.98 1.26 26.50 21.60 1.37 27.55 20.75 1.39 29.42 20.92 1.39 30.89 21.32 1.39

40 23.53 20.00 0.95 25.00 21.13 1.29 26.46 21.75 1.40 27.51 20.89 1.42 29.38 21.06 1.42 30.84 21.46 1.42

45 23.50 20.14 0.98 24.96 21.27 1.32 26.42 21.90 1.43 27.47 21.03 1.45 29.34 21.21 1.46 30.80 21.61 1.45

50 23.47 20.27 1.00 24.92 21.41 1.35 26.38 22.04 1.46 27.43 21.17 1.49 29.30 21.35 1.49 30.75 21.75 1.49

55 23.43 20.41 1.02 24.89 21.56 1.38 26.34 22.19 1.50 27.39 21.31 1.52 29.25 21.49 1.52 30.71 21.90 1.52

60 23.40 20.54 1.04 24.85 21.70 1.41 26.30 22.34 1.53 27.35 21.45 1.55 29.21 21.63 1.56 30.66 22.04 1.55

65 23.36 20.67 1.07 24.81 21.84 1.44 26.27 22.48 1.56 27.31 21.59 1.59 29.17 21.77 1.59 30.62 22.19 1.59

70 23.33 20.81 1.09 24.78 21.98 1.47 26.23 22.63 1.60 27.27 21.73 1.62 29.13 21.91 1.62 30.57 22.33 1.62

75 22.77 20.46 1.16 24.21 21.65 1.52 25.66 22.31 1.64 26.70 21.44 1.67 28.55 21.65 1.68 29.99 22.08 1.69

80 22.21 20.11 1.23 23.65 21.30 1.57 25.09 21.98 1.68 26.13 21.14 1.71 27.97 21.38 1.74 29.42 21.82 1.76

85 21.65 19.75 1.40 23.09 20.95 1.70 24.53 21.64 1.81 25.57 20.83 1.84 27.40 21.09 1.87 28.84 21.54 1.90

90 21.09 19.37 1.56 22.53 20.58 1.84 23.96 21.29 1.93 25.00 20.51 1.96 26.83 20.79 2.00 28.27 21.26 2.03

95 20.49 19.17 1.73 21.92 20.40 1.96 23.35 21.13 2.03 24.00 20.06 2.00 26.20 20.68 2.10 27.63 21.17 2.14

100 19.99 18.66 1.82 21.42

19.88 2.00 22.85 20.62 2.05 23.69 19.75 2.03 25.70 20.23 2.10 27.13 20.73 2.14

105 19.49 18.14 1.90 20.92 19.37 2.04 22.35 20.12 2.06 23.38 19.44 2.07 25.20 19.79 2.10 26.63 20.30 2.14

110 18.99 17.52 1.85 20.42 18.74 1.93 21.85 19.50 1.92 22.88 18.86 1.91 24.70 19.23 1.93 26.13 19.74 1.98

115 18.49 17.00 1.66 19.92 18.21 1.68 21.35 18.98 1.64 22.38 18.38 1.61 24.20 18.77 1.62 25.63 19.29 1.66

118 17.47 16.20 1.47 18.84 17.38 1.45 20.21 18.13 1.38 21.20 17.56 1.35 22.95 17.96 1.35 24.32 18.47 1.38

122 17.12 15.93 1.41 18.48 17.10 1.37 19.83 17.84 1.30 20.80 17.29 1.26 22.53 17.68 1.26 23.88 18.19 1.29

TC = Total Capacity (kBtu/h).

SHC: Sensible Heat Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.

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).

The shaded table rows indicate reference data. When operating at this temperature, these values can

be different if the system is not running consistently.

PERFORMANCE DATA

Cooling Capacity Tables

Due to our policy of continuous product innovation, some specications may change without notication.

40 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

PERFORMANCE DATA

Cooling Capacity Tables

Model No. /

Nominal Capacity

(Btu/h)

Outdoor

Air Temp.

(°F DB)

Indoor Air Temp. °F DB / °F WB

68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75

TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

LH367HV

36,000

5 35.66 26.60 1.16 37.87 28.10 1.57 40.09 28.93 1.70 41.69 27.78 1.73 44.52 28.02 1.73 46.73 28.55 1.73

10 35.61 26.80 1.19 37.82 28.31 1.62 40.03 29.14 1.75 41.63 27.99 1.78 44.45 28.22 1.78 46.67 28.76 1.78

15 35.56 26.99 1.22 37.77 28.51 1.66 39.97 29.35 1.80 41.57 28.19 1.83 44.39 28.43 1.83 46.60 28.97 1.82

20 35.51 27.18 1.26 37.71 28.72 1.70 39.92 29.56 1.85 41.51 28.39 1.87 44.33 28.63 1.88 46.53 29.17 1.87

25 35.45 27.38 1.29 37.66 28.92 1.75 39.86 29.77 1.89 41.45 28.59 1.92 44.26 28.83 1.93 46.46 29.38 1.92

30 35.40 27.57 1.32 37.60 29.12 1.79 39.80 29.98 1.94 41.39 28.79 1.97 44.20 29.03 1.97 46.40 29.58 1.97

35 35.35 27.76 1.35 37.55 29.32 1.84 39.74 30.18 1.99 41.33 28.99 2.02 44.13 29.23 2.02 46.33 29.79 2.02

40 35.30 27.95 1.39 37.49 29.52 1.88 39.69 30.39 2.04 41.27 29.19 2.07 44.07 29.43 2.07 46.26 29.99 2.07

45 35.25 28.14 1.42 37.44 29.72 1.92 39.63 30.60 2.08 41.21 29.39 2.12 44.01 29.63 2.12 46.20 30.19 2.11

50 35.20 28.33 1.45 37.39 29.92 1.97 39.57 30.80 2.13 41.15 29.58 2.16 43.94 29.83 2.17 46.13 30.40 2.16

55 35.15 28.51 1.48 37.33 30.12 2.01 39.51 31.01 2.18 41.09 29.78 2.21 43.88 30.03 2.22 46.06 30.60 2.21

60 35.10 28.70 1.52 37.28 30.32 2.06 39.46 31.21 2.23 41.03 29.97 2.26 43.82 30.23 2.27 46.00 30.80 2.26

65 35.05 28.89 1.55 37.22 30.52 2.10 39.40 31.41 2.27 40.97 30.17 2.31 43.75 30.42 2.31 45.93 31.00 2.31

70 34.99 29.07 1.58 37.17 30.71 2.15 39.34 31.61 2.32 40.91 30.36 2.36 43.69 30.62 2.36 45.86 31.20 2.36

75 34.15 28.59 1.68 36.32 30.25 2.21 38.49 31.17 2.39 40.05 29.96 2.43 42.82 30.25 2.45 44.99 30.85 2.46

80 33.31 28.11 1.79 35.47 29.77 2.28 37.64 30.71 2.45 39.20 29.55 2.49 41.96 29.87 2.53 44.12 30.49 2.57

85 32.48 27.59 2.03 34.63 29.27 2.48 36.79 30.24 2.63 38.35 29.11 2.67 41.10 29.46 2.72 43.26 30.10 2.76

90 31.64 27.07 2.28 33.79 28.76 2.68 35.94 29.75 2.81 37.50 28.66 2.85 40.25 29.05 2.90 42.40 29.71 2.96

95 30.74 26.79 2.52 32.88 28.50 2.86 35.02 29.52 2.96 36.00 28.03 2.91 39.30 28.90 3.05 41.44 29.58 3.11

100 29.99 26.07 2.64 32.13

27.78 2.91 34.27 28.82 2.98 35.53 27.60 2.96 38.55 28.27 3.05 40.69 28.97 3.11

105 29.24 25.35 2.77 31.38 27.06 2.96 33.52 28.11 3.00 35.07 27.16 3.01 37.80 27.65 3.05 39.94 28.36 3.11

110 28.49 24.49 2.69 30.63 26.18 2.80 32.77 27.24 2.79 34.32 26.35 2.78 37.05 26.87 2.81 39.20 27.59 2.87

115 27.74 23.75 2.41 29.88 25.45 2.44 32.02 26.52 2.38 33.57 25.68 2.35 36.31 26.23 2.36 38.45 26.96 2.41

118 26.20 22.64 2.14 28.26 24.28 2.11 30.31 25.33 2.01 31.80 24.54 1.97 34.42 25.09 1.96 36.48 25.81 2.01

122 25.69 22.26 2.04 27.71 23.89 1.99 29.74 24.93 1.89 31.21 24.16 1.84 33.80 24.71 1.83 35.82 25.42 1.88

Table 22: LH367HV Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table.

TC = Total Capacity (kBtu/h).

SHC: Sensible Heat Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.

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).

The shaded table rows indicate reference data. When operating at this temperature, these values can

be different if the system is not running consistently.

DUCTED | 41

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

Heating Capacity Tables

PERFORMANCE DATA

Table 23: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Heating Capacity Table.

Table 24: LD127HV4 Ceiling-Concealed Ducted (Low Static) 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

LD097HV4 / 9,000

-4 -4.4 8.12 0.86 7.68 0.90 7.53 0.90 7.42 0.91 7.33 0.91 7.03 0.95

0 -0.4 8.58 0.89 8.16 0.93 7.98 0.94 7.85 0.95 7.75 0.95 7.43 0.99

5 4.5 9.14 0.93 8.74 0.96 8.52 0.98 8.38 0.99 8.26 1.00 7.93 1.04

10 9 9.66 0.97 9.28 1.00 9.01 1.02 8.86 1.04 8.73 1.05 8.39 1.08

17 15 10.35 1.01 9.99 1.05 9.68 1.08 9.50 1.10 9.36 1.11 9.00 1.14

20 19 10.81 1.04 10.47 1.08 10.12 1.11 9.93 1.13 9.78 1.15 9.41 1.18

25 23 11.58 1.10 11.24 1.13 10.85 1.17 10.64 1.20 10.48 1.22 10.08 1.25

30 28 12.36 1.16 11.98 1.20 11.57 1.24 11.36 1.26 11.19 1.28 10.78 1.32

35 32 13.14 1.22 12.73 1.26 12.29 1.30 12.07 1.33 11.89 1.35 11.46 1.38

40 36 13.81 1.26 13.43 1.30 13.00 1.34 12.77 1.36 12.59 1.39 12.14 1.42

45 41 14.65 1.30 14.30 1.34 13.88 1.39 13.65 1.41 13.46 1.43 12.98 1.47

47 43 14.99 1.32 14.65 1.36 14.23 1.41 14.00 1.43 13.81 1.45 13.31 1.49

50 46 15.03 1.31 14.73 1.35 14.36 1.39 14.15 1.41 13.99 1.43 13.52 1.46

55 51 15.10 1.30 14.85 1.33 14.58 1.36 14.41 1.38 14.28 1.39 13.85 1.42

60 56 15.18 1.28 14.98 1.31 14.80 1.33 14.67 1.34 14.57 1.35 14.19 1.37

63 59 15.22 1.27 15.05 1.29 14.92 1.31 14.82 1.32 14.74 1.33 14.40 1.34

68 64 15.26 1.27 15.13 1.28 15.06 1.30 14.98 1.30 14.92 1.30 14.61 1.31

TC = Total Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each 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).

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

LD127HV4 / 12,000

-4 -4.4 5.93 0.93 5.48 0.97 5.46 0.98 5.40 0.99 5.35 0.99 5.11 1.03

0 -0.4 7.22 0.94 6.79 0.98 6.68 1.00 6.59 1.00 6.52 1.01 6.24 1.05

5 4.5 8.75 0.96 8.34 1.00 8.14 1.02 8.01 1.03 7.90 1.04 7.58 1.07

10 9 9.77 0.98 9.37 1.01 9.11 1.04 8.96 1.05 8.83 1.06 8.48 1.10

17 15 10.89 1.00 10.52 1.03 10.18 1.06 10.00 1.08 9.85 1.09 9.47 1.13

20 19 11.58 1.01 11.21 1.04 10.83 1.08 10.63 1.10 10.47 1.12 10.07 1.15

25 23 12.72 1.04 12.34 1.07 11.91 1.11 11.69 1.13 11.51 1.15 11.07 1.18

30 28 13.87 1.07 13.44 1.11 12.98 1.14 12.74 1.16 12.55 1.18 12.09 1.21

35 32 15.02 1.10 14.54 1.14 14.05 1.17 13.80 1.20 13.59 1.22 13.10 1.25

40 36 15.79 1.13 15.34 1.17 14.85 1.21 14.60 1.23 14.39 1.25 13.87 1.28

45 41 16.74 1.17 16.34 1.21 15.86 1.25 15.60 1.27 15.39 1.29 14.83 1.33

47 43 17.13 1.19 16.74 1.23 16.27 1.27 16.00 1.29 15.79 1.31 15.21 1.35

50 46 17.18 1.18 16.83 1.22 16.41 1.25 16.18 1.27 15.99 1.29 15.45 1.32

55 51 17.26 1.17 16.97 1.20 16.66 1.23 16.47 1.24 16.32 1.25 15.83 1.28

60 56 17.34 1.16 17.12 1.18 16.91 1.20 16.76 1.21 16.65 1.22 16.22 1.24

63 59 17.40 1.15 17.21 1.17 17.06 1.19 16.94 1.19 16.85 1.20 16.46 1.21

68 64 17.45 1.14 17.29 1.16 17.21 1.17 17.12 1.17 17.05 1.18 16.69 1.19

TC = Total Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each 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).

Due to our policy of continuous product innovation, some specications may change without notication.

42 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

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

LH247HV

24,000

0 -0.4 13.59 1.70 12.80 1.77 12.79 1.79 12.50 1.81 12.26 1.82 11.75 1.89

5 4.5 15.90 1.73 15.16 1.79 14.93 1.83 14.62 1.85 14.36 1.87 13.79 1.93

10 9 17.45 1.75 16.74 1.81 16.37 1.86 16.04 1.88 15.77 1.90 15.15 1.96

17 15 19.15 1.78 18.48 1.84 17.95 1.90 17.60 1.93 17.32 1.96 16.65 2.01

20 19 20.18 1.81 19.54 1.86 18.91 1.93 18.55 1.96 18.26 1.99 17.56 2.04

25 23 21.90 1.85 21.25 1.90 20.51 1.97 20.12 2.01 19.81 2.04 19.07 2.10

30 28 23.63 1.90 22.89 1.96 22.11 2.02 21.70 2.06 21.38 2.10 20.59 2.15

35 32 25.35 1.95 24.54 2.02 23.71 2.07 23.28 2.12 22.94 2.15 22.11 2.21

40 36 26.64 2.00 25.89 2.07 25.07 2.13 24.63 2.18 24.29 2.21 23.41 2.27

45 41 28.26 2.07 27.58 2.14 26.77 2.21 26.32 2.25 25.97 2.28 25.02 2.35

47 43 28.90 2.10 28.26 2.17 27.45 2.24 27.00 2.28 26.64 2.31 25.67 2.38

50 46 28.99 2.09 28.40 2.15 27.70 2.21 27.30 2.25 26.98 2.27 26.07 2.34

55 51 29.13 2.07 28.65 2.12 28.12 2.17 27.79 2.19 27.54 2.21 26.72 2.26

60 56 29.27 2.04 28.89 2.08 28.53 2.12 28.29 2.14 28.09 2.15 27.38 2.18

63 59 29.35 2.03 29.03 2.06 28.78 2.10 28.59 2.11 28.43 2.11 27.77 2.14

68 64 29.44 2.02 29.18 2.04 29.04 2.07 28.89 2.07 28.77 2.08 28.17 2.10

Table 25: LH247HV Ceiling-Concealed Ducted (High Static) System Heating Capacity Table.

Heating Capacity Tables

PERFORMANCE DATA

Table 26: LH367HV Ceiling-Concealed Duct (High Static) 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

LH367HV

36,000

0 -0.4 10.89 2.36 10.10 2.45 10.27 2.49 10.02 2.51 9.82 2.53 9.38 2.62

5 4.5 16.13 2.42 15.33 2.51 15.16 2.56 14.83 2.59 14.57 2.61 13.98 2.70

10 9 19.64 2.47 18.83 2.56 18.43 2.62 18.06 2.66 17.75 2.69 17.05 2.77

17 15 23.50 2.54 22.68 2.62 22.03 2.70 21.60 2.75 21.25 2.79 20.44 2.87

20 19 25.84 2.59 25.02 2.67 24.21 2.76 23.75 2.81 23.38 2.85 22.49 2.93

25 23 29.74 2.67 28.86 2.75 27.86 2.86 27.33 2.91 26.91 2.96 25.89 3.04

30 28 33.65 2.77 32.61 2.86 31.49 2.95 30.91 3.02 30.45 3.07 29.33 3.14

35 32 37.55 2.87 36.36 2.97 35.12 3.05 34.49 3.12 33.98 3.18 32.76 3.25

40 36 39.47 2.95 38.36 3.05 37.14 3.14 36.49 3.21 35.98 3.26 34.68 3.34

45 41 41.86 3.06 40.86 3.16 39.66 3.26 39.00 3.32 38.47 3.36 37.07 3.46

47 43 42.82 3.10 41.86 3.20 40.66 3.30 40.00 3.36 39.47 3.41 38.03 3.51

50 46 42.94 3.08 42.08 3.17 41.04 3.26 40.44 3.31 39.97 3.35 38.62 3.44

55 51 43.15 3.05 42.44 3.12 41.65 3.20 41.18 3.23 40.79 3.26 39.59 3.33

60 56 43.36 3.01 42.80 3.07 42.27 3.13 41.91 3.15 41.62 3.17 40.56 3.22

63 59 43.49 2.99 43.01 3.04 42.64 3.09 42.35 3.10 42.12 3.12 41.14 3.15

68 64 43.61 2.97 43.23 3.01 43.02 3.05 42.80 3.06 42.62 3.06 41.73 3.09

TC = Total Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each 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).

TC = Total Capacity (kBtu/h).

PI = Power input (KW). Power input (KW) includes compressor and fan(s).

Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor

unit. Corresponding refrigerant piping length is accordance with standard length of each 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).

DUCTED | 43

Product Data

Due to our policy of continuous product innovation, some specications may change without notication.

44 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

“Equipment Selection Procedure” on page 46

“Building Ventilation Design Guide” on page 48

“Placement Considerations” on page 53

APPLICATION

GUIDELINES

Due to our policy of continuous product innovation, some specications may change without notication.

46 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Altitude Correction Factor

The impact of air density must be considered on systems installed at a significant altitude above sea level, therefore, locally accepted

altitude correction factors must be applied.

Cooling / Heating Correction Factors

For Ceiling-Concealed Ducted systems, calculate the equivalent length of the liquid line from the outdoor unit to the indoor unit. Also, deter-

mine the elevation difference of the indoor unit above or below the outdoor unit. Find corresponding cooling or heating capacity correction

factors as shown below. Multiply the correction factors by the cooling or heating capacity obtained 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 27: Low Static Ducted System Cooling and Heating Capacity Coefcient Factors.

Equivalent Piping Length for Piping Components

Piping Length (ft.) 24.6 32.8 49.2 65.6 98.4 131.2 164.0 196.9 229.7 246.0

Cooling Capacity Coefficient Factor

Rate of Capacity

Change (%)

LD097HV4 (9,000) 100 99.7 99.2 98.7 - - - - - -

LD127HV4 (12,000) 100 99.7 99.2 98.7 - - - - - -

Heating Capacity Coefficient Factor

Rate of Capacity

Change (%)

LD097HV4 (9,000) 100 99.7 99.2 98.7 - - - - - -

LD127HV4 (12,000) 100 99.7 99.2 98.7 - - - - - -

Table 28: High Static Ducted System Cooling and Heating Capacity Coefcient Factors.

Component Size (Inches)

Elbow (ft.)

1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 2-1/8

0.5 0.6 0.7 0.8 1.2 1.3 1.5 1.6 1.8 2.0 2.1 2.3 2.5 2.8

EQUIPMENT SELECTION PROCEDURE

Table 29: Equivalent Piping Length for Elbows.

Piping Length (ft.) 16.4 32.8 49.2 65.6 98.4 131.2 164.0 196.9 229.7 246.0

Cooling Capacity Coefficient Factor

Rate of Capacity

Change (%)

LH247HV (24,000 Btu/h) 100 99.3 97.9 96.6 93.8 91.1 88.4 - - -

LH367HV (36,000 Btu/h) 100 99.3 97.9 96.6 93.8 91.1 88.4 85.6 82.9 81.5

Heating Capacity Coefficient Factor

Rate of Capacity

Change (%)

LH247HV (24,000 Btu/h) 100 99.7 99.2 98.7 97.7 96.6 95.6 - - -

LH367HV (36,000 Btu/h) 100 99.7 99.2 98.7 97.7 96.6 95.6 94.6 93.5 93.0

Due to our policy of continuous product innovation, some specications may change without notication.

DUCTED | 47

Application Guidelines

EQUIPMENT SELECTION PROCEDURE

Table 30: Outdoor Unit Frost Accumulation Factor (Heating)

There will be temporary reduction in capacity when frost / ice accumulates on the outside surface of the outdoor unit heat exchanger. The level

of capacity reduction depends on a number of factors, for example, outdoor temperature (°F DB), relative humidity (RH), and the amount of frost

present.

Entering DB (ºF)

19.4 23.0 26.6 32.0 37.4 41.0 44.6

Derate factor

0.98 0.95 0.93 0.86 0.93 0.96 1.0

At 85% outdoor air relative humidity.

The frost accumulation factor does not account for effects of snow accumulation restricting airflow

through the outdoor unit coil.

Defrost Correction Factor for Heating Operation

The outdoor unit heating capacity may need to be adjusted for frost accumulation on air-cooled systems. If design day conditions are below

the dewpoint of the surrounding air, frost may not be a problem and no correction factor is needed. In certain weather conditions, however,

frost may form and accumulate on the air-cooled outdoor unit coil and impact the coils ability to transfer heat. If significant frost accumulates

on the outdoor unit coil, a defrost algorithm will start automatically. The timing between defrost periods is determined by the system’s ability

to achieve a target head pressure value.

Capacity and AHRI ratings tables do not factor in capacity reduction when frost has accumulated on the condenser coil, nor during defrost

operation.

Integrated heating capacity values can be obtained using the formula:

A = B x C

Where:

A = Integrated Heating Capacity.

B = Value found in the Capacity Table.

C = Correction Factor for Frost Accumulation Factor (from Table 24).

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 capacity also must be at least equal to the total of the heating

design load (plus ventilation load, if applicable) for the space(s) and / or thermal zones served by the indoor unit.

The outdoor unit selected should be large enough to offset the total cooling load for all spaces it serves (account for ventilation air cooling

load if the ventilation air has not been pretreated to room neutral conditions). The outdoor unit should also be large enough to offset the total

heating load for all spaces it serves.

If the corrected heating capacity ratio exceeds 100%, reselect the equipment, or change the system design by moving some of the load to

another system.

• Understand the design safety factors.

• Reference load calculations for actual cooling and heating capac-

ities (applies in 99% of applications – consider total load when

latent load is greater than 30%).

• Verify that the sensible load of the zone is satisfied.

• Use caution when sizing to meet listed capacity specifications for

the scheduled manufacturer’s equipment.

If further system design assistance is needed, or you have a unique

application you would like to discuss, contact your LG sales rep.

1. Outdoor Unit Rated Capacity.

odu(rated)

(From capacity tables).

2. Outdoor Unit Capacity at Ti, To Temperature.

odu(Ti, To)

(From capacity tables).

3 Outdoor Unit Capacity Coefficient Factor.

(Ti, To)

= Q

odu(Ti, To)

/ Q

odu(rated)

4. Piping Correction Factor (From Capacity Coefficient

Factor Tables).

(length)

for each piping length

5. Individual Indoor Unit Combination Capacity.

idu (combi)

= Q

odu(rated)

x Q

idu(rated)

/ Q

idu(rated-total)

6. Individual Indoor Unit Actual Capacity.

idu (actual)

= Q

odu(combi)

x F

(Ti, To)

x F

(length, altitude)

System Sizing Check Formulas

Conclusions and Recommendations

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48 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

ASHRAE Standards 62.1 and 62.2 (depending on if the building is residential or commercial), and local codes specify the minimum volume

of airflow that must be provided to an occupied space. Outdoor air is required to minimize adverse health effects, and it provides acceptable

indoor air quality for building occupants while helping reduce the effects of off-gassing from certain building materials that may contribute

to the corrosion of indoor units. Indoor units located within the zone typically require less airflow to condition the space. During the design

phase, refer to the airflow capabilities listed in the specification tables for each product. Choose the best method for the application out of the

five (5) ventilation options available.

Disclaimer

Although we believe that these building ventilation methods have been portrayed accurately, none of the methods have been tested, veried, or

evaluated by LG Electronics, U.S.A., Inc., In all cases, the designer, installer, and contractor should understand if the suggested method is used,

it is used at their own risk. LG Electronics U.S.A., Inc., takes no responsibility and offers no warranty, expressed or implied, of merchantability

or tness 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 ventilation devices, such as operable windows or louvers may be used to ventilate the building when local code permits. The open

area of a window or the free area of a louver must meet the minimum percentage of the net occupied floor area.

Advantages

• Occupants control the volume of the ventilation air manually.

• Useful for historic buildings that have no ceiling space available for

outdoor air ductwork.

• May be used with the full lineup of Duct-Free Split system indoor

units.

Disadvantages

• In some locations, it may be difficult to control humidity levels when

windows are open.

• Thermal comfort levels may be substandard when windows are

open.

• Indoor units may have to be oversized to account for the added

heating and cooling loads when windows are open.

• Provides outdoor air to perimeter spaces only. Additional mechan-

ical ventilation system may be required to satisfy requirements for

interior spaces.

• Outdoor air loads may be difficult to calculate since the quantity of

outdoor air is not regulated.

• May affect indoor unit proper operation when open.

Figure 24: Natural Ventilation (Non-Ducted, Unconditioned Outdoor Air).

BUILDING VENTILATION DESIGN GUIDE

Methodology illustrations are for examples only and do not depict actual

indoor units for the specic outdoor unit pairing. These are generic illus-

trations to show ventilation design only.

Due to our policy of continuous product innovation, some specications may change without notication.

DUCTED | 49

Application Guidelines

BUILDING VENTILATION DESIGN GUIDE

OA Wall

Louver

Damper

Roof Fan

Method 2: Unconditioned Outdoor Air (Non-Ducted, Fan Assisted Ventilation)

When approved by local codes, the fan assisted ventilation method uses exhaust fans to remove air from the building, and outdoor air is

drawn into occupied spaces through a wall louver or gravity roof intake hood. Supply fans can also be used to push the outdoor air into the

space and building positive pressure will vent the exhaust air through louvers or roof-mounted exhaust hoods. Outdoor air is neither 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 amount of outdoor air.

• May be used with the full lineup of Duct-Free Split system indoor

units.

This may result in loss of building pressurization control, increasing inltration loads with adverse effects.

Disadvantages

• In some locations of the country, it may be difficult to control

humidity levels.

• Thermal comfort levels may be substandard when louvers/hoods

are opened.

• Indoor units may have to be oversized to account for the added

heating/cooling loads when louvers/hoods are open.

• Hot, cold, and/or humid areas may be present if the outdoor air is

not evenly distributed to the different spaces.

Figure 25: Unconditioned Outdoor Air (Non-Ducted, Fan Assisted Ventilation).

Methodology illustrations are for examples only and do not depict actual

indoor units for the specic outdoor unit pairing. These are generic illus-

trations to show ventilation design only.

Due to our policy of continuous product innovation, some specications may change without notication.

50 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Method 3: Unconditioned Outdoor Air Ducted to Indoor Units

Untreated outdoor air is channeled through a duct system that is piped to the return air duct on Duct-Free Split system ducted indoor units or

to the frame of Duct-Free Split system four-way cassettes.

Advantages

• May require less ductwork if indoor units are

placed near outdoor walls or a roof deck.

• Controls must be interlocked to shut off the

outdoor air supply fan when the space is

unoccupied.

• Third-party demand-control ventilation

controls may be installed to regulate outdoor

intake based on the CO

levels 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 indoor units, a

remote wall temperature sensor or zone controller will be needed to provide an accurate

reading of the conditioned area temperature.

• Unconditioned outdoor air may affect indoor unit performance, which may necessitate

oversizing the indoor unit.

Outside air may ow backward through the return air-lter grille when the indoor unit fan speed slows or stops in response to changes in the

space load. This may result in captured particulate on the lter media being blown back into the conditioned space.

OA Wall Cap

Damper

Inline Fan

with Filter

Figure 26: Unconditioned Outdoor Air Ducted to Indoor Units.

BUILDING VENTILATION DESIGN GUIDE

Methodology illustrations are for examples only and do not depict actual

indoor units for the specic outdoor unit pairing. These are generic illus-

trations to show ventilation design only.

Due to our policy of continuous product innovation, some specications may change without notication.

DUCTED | 51

Application Guidelines

BUILDING VENTILATION DESIGN GUIDE

Method 4: Coupled Dedicated Outdoor Air (CDOA)

A separate, dedicated outdoor air system delivers air directly to a Duct-Free Split system indoor unit or to the return air duct system. After

mixing with the return air stream, ventilation air passes through the indoor unit and into the conditioned space. The pretreatment system is

capable of filtering, conditioning, and dehumidifying outdoor air to room neutral 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 using the factory mounted return-air thermistor, a remote wall temperature

sensor or zone controller may be required to provide an accurate conditioned space

temperature reading.

Outside air may ow backward through the return air-lter grille when the indoor unit fan speed is reduced or stops when the space load is

satised. This may result in captured particulate on the lter media being blown back into the conditioned space.

Outdoor

Air Unit

Figure 27: Coupled Dedicated Outdoor Air (CDOA).

Methodology illustrations are for examples only and do not depict actual

indoor units for the specic outdoor unit pairing. These are generic illus-

trations to show ventilation design only.

Due to our policy of continuous product innovation, some specications may change without notication.

52 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Method 5: Decoupled Dedicated Outdoor Air System (DDOAS)

Provide a separate, dedicated outdoor-air system designed to filter, condition, and dehumidify ventilation air and deliver it directly to the

conditioned space through a separate register or grille. This approach requires a separate independent ventilation duct system not

associated with the Duct-Free Split system.

Advantages

• May be used with the full lineup of Duct-Free Split system indoor

units.

• 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 the building, this method centralizes the

ventilation air source making service and filter changes easier and

less disruptive for the building occupants.

•

Third-party demand control ventilation controls are more readily

accommodated.

Disadvantages

• Ceiling space is required to accommodate ductwork between the

outdoor air unit and ceiling diffusers.

LG recommends using the DDOAS method in all installations.

Outdoor

Air Unit

Indoor Unit s

Ceiling Diffuser

Indoor Unit

Figure 28: Decoupled Dedicated Outdoor Air System (DDOAS).

BUILDING VENTILATION DESIGN GUIDE

Methodology illustrations are for examples only and do not depict actual

indoor units for the specic outdoor unit pairing. These are generic illus-

trations to show ventilation design only.

Due to our policy of continuous product innovation, some specications may change without notication.

DUCTED | 53

Application Guidelines

PLACEMENT CONSIDERATIONS

Installing in an Area Exposed to Unconditioned Air

In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an

unheated garage or storeroom). To countermeasure:

• Verify that carpet is or will be installed (carpet may increase the temperature by three degrees).

• Add insulation between the floor joists.

• Install radiant heat or another type of heating system to the floor.

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 collect in the plenum:

• Install additional insulation to the indoor unit (glass wool insulation >13/32 inches thick).

• Install additional insulation to the refrigerant piping (insulation >13/16 inches thick).

• Seal all gaps between the indoor unit and the ceiling tiles (make the area air tight) so that humidity does not transfer from the plenum to the

conditioned space. Also, add a ceiling grille for ventilation.

Indoor Unit

Select a location for installing the indoor units that will meet the following conditions:

• Place the unit where air circulation will not be blocked.

• Locate the indoor unit in a location that is level, and where it can be easily connected to the outdoor unit.

• So that condensation drainage can be conveniently routed away.

• Include enough space around the indoor unit so that it is accessible for maintenance and service purposes.

• Where electrical noise / electromagnetic waves will not affect indoor unit operation. Maintain proper distances between the indoor units and

electric wires, audio and visual appliances, breaker / circuit panels, etc. If the frequency signal of the appliance is unstable, then install the

indoor unit a minimum of ten (10) feet away, and run the power and transmission cables through a conduit.

• An area that is level and with enough strength to bear the weight of the indoor unit(s).

Don’ts

• No obstacles to air circulation around the unit; keep proper distances from ceilings, doorways, floor, walls, etc.

• The unit should not be installed near a heat or steam source, or where considerable amounts of oil, iron powder, or flour are used.

• The unit should not be installed where sulfuric acid and flammable or corrosive gases are generated, vented into, or stored.

• Avoid installing the unit near high-frequency generators or near any equipment that generates an electromagnetic field (minimum 3-1/3 feet

away).

If the unit is installed near a body of water, certain components are at risk of being corroded. Appropriate anti-corrosion methods should be taken

for the unit and all components.

The unit should not be installed where sulfuric acid and ammable or corrosive gases are generated, vented into, or stored. There is risk of

re, explosion, and physical injury or death.

Selecting the Best Location for the Indoor Unit

The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed.

Due to our policy of continuous product innovation, some specications may change without notication.

54 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Figure 29: Low Static Ducted Indoor Unit General Service Space Required Dimensions and Bolt Locations

Figure 30: Low Static Ducted Indoor Unit Access Panel Required

Dimensions.

Table 31: Low Static Ducted Indoor Unit Bolt Location Dimensions.

Indoor Unit

PLACEMENT CONSIDERATIONS

Drainage hole

Model / Capacity (Btu/h)

Dimensions (in.)

A B

LDN097HV4 / 9,000

31-1/2

LDN127HV4 / 12,000 39-3/8

Access Opening

(

23-5/8

)

Control box

H = ≤25/32

• "H" dimension is necessary to ensure a slope is included for

condensate drainage.

Side view

23-5/8

(Unit : Inch)

Top view

A (Min)

Ceiling

Service Space

B (Min)

Model / Capacity (Btu/h)

Dimensions (in.)

A B C D E F G H I J

LDN097HV4 / 9,000 28-27/32 30-13/32

24-23/32 27-9/16 1-13/32 7-15/32 25/32

25-31/32

6-3/32

27-9/16

LDN127HV4 / 12,000 36-23/32 38-9/32 33-27/32 35-7/16

Table 32: Low Static Ducted Indoor Unit Access Panel Required

Dimensions.

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DUCTED | 55

Application Guidelines

Drain hole

23-5/8 inches x 23-5/8 inches

23-5/8

inches

39-3/8

inches

H = ≥25/32 inches

23-5/8

inches

Model / Capacity (Btu/h)

Dimensions (inches)

A B C D E F G H I

LHN247HV / 24,000 48-17/32 46-17/32 13-31/32 1-3/4 17-23/32 1-3/16 3-5/8 32-11/16 7-5/16

LHN367HV / 36,000 50-15/32 48-7/16 18-13/16 2-1/4 23-7/32 1-3/16 4-3/4 39-19/32 11-9/16

Figure 33: High Static Ducted Indoor Unit Access Panel and General

Service Space Required Dimensions.

Figure 34: High Static Ducted Indoor Unit Bolt Locations.

Table 33: High Static Ducted Indoor Unit Bolt Location Dimensions.

Indoor Unit

PLACEMENT CONSIDERATIONS

1/50~1/100 slope

Hanger distance

3.3~49.2 feet

Hanger Bracket

Maximum

27-9/16 inches

Flexible drain hose

Insulation

Metal

clamp

Maximum

11-13/16 inches

Indoor Unit Drain System

• Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope

should not be straight up and down.

• Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping.

• 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.

Drain Port

Maintenance

Drain Pipe Support

Indoor unit

1/50~1/100mm

Maximum

27-9/16 inches

Figure 31: Indoor Unit Drain Piping.

Figure 32: Drain Piping Installation Dimensions.

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56 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

PLACEMENT CONSIDERATIONS

Outdoor Unit

When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze

on sidewalks or driveways which may create unsafe conditions.

CAUTION

Selecting the Best Location for the Outdoor Unit

To avoid the possibility of re, do not install the unit in an area where combustible gas may generate, ow, stagnate, or leak. Failure to do so will

cause serious bodily injury or death.

Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it.

Do not install the unit in a location where

acidic solution and spray (sulfur) are often used as this may cause serious bodily injury or death.

Do not use the unit in environments where oil,

steam, or sulfuric gas are present as this may cause serious bodily injury or death.

Select a location for installing the outdoor unit that will meet the following conditions:

• Where the unit 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 vents,

and other sources of extreme temperatures.

• Where operating sound from the unit will not disturb inhabitants of surrounding buildings.

• Where the unit will not be exposed to direct, strong winds.

• Where there is enough strength to bear the weight of the unit.

• Include space for drainage to ensure condensate flows properly out of the unit when it is in heating mode. Avoid placing the outdoor unit in

a low-lying area where water could accumulate.

• A location that allows for optimum air flow and is easily accessible for inspection, maintenance, and service.

• Where piping between the outdoor unit and indoor unit are within allowable limits.

• Where high-frequency electrical noise / electromagnetic waves will not affect operation.

The indoor unit may take longer to provide heat, or heating performance will be reduced in winter if the unit is installed:

1. In a narrow, shady location.

2. Near a location that has a lot of ground moisture.

3. In a highly humid environment.

4. In an area in which condensate does not drain properly.

Planning for Snow and Ice

In climates that experience snow buildup, place the unit on a raised platform to ensure proper condenser airflow. The raised support platform

must be high enough to allow the unit to remain above possible snow drifts. Mount the unit on a field-provided stand that is higher than the

maximum anticipated snowfall for the location. Design the mounting base to prevent snow accumulation on the platform in front or back of

the unit case. If necessary, provide a field fabricated hood to keep snow and ice and/or drifting snow from accumulating on the coil surfaces.

Use inlet and discharge duct or hoods to prevent snow or rain from accumulating on the fan inlet and outlet guards. Best practice prevents

snow from accumulating on top of the unit. Consider tie-down requirements in case of high winds or where required by local codes.

DANGER

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DUCTED | 57

Application Guidelines

Outdoor Unit

PLACEMENT CONSIDERATIONS

Tie-Downs / Wind Restraints and Lightening Protection

The strength of the Ceiling-Concealed Duct (High Static) system

outdoor unit frame is adequate to be used with field-provided wind

restraint tie-downs.

Tie-Downs / Wind Restraints

• The strength of the roof must be checked before installing the

outdoor units.

• If the installation site is prone to high winds or earthquakes, when

installing on the wall or roof, securely anchor the mounting base

using a field-provided tie-down configuration approved by a local

professional engineer.

• The overall tie-down configuration must be approved by a local

professional engineer. Always refer to local code when using a

wind restraint system.

Lightening Protection

• To protect the outdoor unit from lightning, it should be placed within

the specified lightning safety zone.

• Power cable and communication 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 35: Lightening Protection Diagram.

Table 34: Safety Zone Specications.

Building Height (feet)

66 98 148 197

Protection Angle (˚)

55 45 35 25

If the building does not include lightning protection, the outdoor unit

may be damaged from a lightening strike. Inform the customer of

this possibility in advance.

General Mounting

Securely attach the outdoor unit to a condenser pad, base rails, or other mounting platform

that is securely anchored to the ground or building structure. The underlying structure or

foundation must be designed to support the weight of the unit, and avoid placing the outdoor

unit in a low lying area where water may accumulate.

Attaching the Outdoor Unit to the Bracket

When installing the outdoor unit on a wall or roof top, anchor the mounting base securely

using nails or wire with regard to wind and earthquake or vibration.

Refer to installation manual, and follow the applicable local code for clearance, mounting,

anchor, and vibration attenuation requirements.

Figure 36: Bracket Mounting.

• All referenced materials are to be field-supplied.

• Images are not to scale.

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58 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Concrete Platform Specifications

• Concrete foundations should be made of one part cement, two

parts sand, and four parts gravel.

• The surface of the foundation should be finished with mortar with

rounded edges, and weatherproofed.

Figure 38: Close up of Bolt Attachment.

Figure 39: Bolting the LUU247HV Outdoor Unit to the Platform.

Figure 37: Bolting the LUU097HV and LUU127HV Outdoor Units to the

Platform (Appearance May Vary).

Minimum

7-7/8

Minimum

15-3/4

Minimum 24-13/32

Unit: Inch

Bolting the Outdoor Unit to the Platform

Bolting the Outdoor Unit to the Platform Procedure

When installing the outdoor unit onto a concrete or rigid mount, use

a bolt and nut.

1. Ensure that the concrete platform will not degrade easily, and has

enough strength to bear the weight of the unit.

2. Include an H-beam support. Firmly attach the corners, otherwise

the support will bend.

3. Use a hexagon nut.

4. Use anti-vibration material.

5. Include enough space around the concrete foundation for con-

densate drainage.

6. Seal all wiring and piping access holes to prevent bugs from

entering the unit.

• All referenced materials are to be field-supplied.

• Images are not to scale.

PLACEMENT CONSIDERATIONS

Outdoor Unit

Bolt and

nti-vibration

Pad Placement

Refrigerant Piping

Connection Location

Foundation

Top of Outdoor Unit

(Looking Down)

Minimum

7-7/8 inches

Minimum 24-13/32 inches

Minimum 15-3/4 inches

Outdoor Unit Bolt Type Concrete Height Bolt Depth

LUU097HV,

LUU127HV

M10-J

Minimum 3-15/16

inches

Minimum 2-3/8 inches

LUU247HV M10-J

Minimum 7-7/8

inches

LUU367HV M10-J

Table 35: Outdoor Unit Foundation Specications.

Figure 40: Bolting the LUU367HV Outdoor Unit to the Platform.

Figure 41: Platform Mounting.

Minimum

3-15/16

inches

Minimum 22-3/16 inches

Minimum 14-19/32 inches

M10

Anchor Bolt

2-3/8 ~ 4-3/32

25/32

Unit: Inch

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DUCTED | 59

Application Guidelines

Outdoor Unit

PLACEMENT CONSIDERATIONS

Outdoor Unit (9,000 to 24,000 Capacity) Service Access and Allowable Clearances

Specific clearance requirements in the diagram below are for (9,000 to 24,000 Btu/h capacities). Figure 42 shows the overall minimum clear-

ances that must be observed for safe operation and adequate airflow around the outdoor unit.

When placing the outdoor unit under an overhang, awning, sunroof or other “roof-like structure”, observe the clearance requirements (as

shown in Cases 1 and 2) for height in relation to the unit. To have successful service access to the outdoor unit, see Figure 42 for minimum

spacing. When installing multiple outdoor units, see Cases 4 and 5 for correct spacing requirements.

Figure 42: 9,000 to 24,000 Capacity Outdoor Unit Service Access and Allowable Clearances Diagram.

1/16 inch

20 inches or less

Case 1

Case 4

Case 2 Case 3

Case 5

20 inches or less

Unit: Inch A B C D E F G

Case 1

Standard 12 24 - 12 - - -

Minimum 4 10 - 4 - - 40

Case 2

Standard - - 20 - - - -

Minimum - - 14 - - - 40

Case 3

Standard - - 20 12 - - -

Minimum - - 14 4 - - -

Case 4

Standard - - - 12 24 - -

Minimum - - - 4 8 79 -

Case 5

Standard - 24 - 12 - - -

Minimum - 10 - 4 - - -

Table 36: 9,000 to 24,000 Outdoor Unit Service Access and Allowable Clearances Diagram Legend.

Do not place the unit where animals

and/or plants will be in the path of the warm

air, or where the warm air and/or noise will

disturb neighbors.

If the outdoor unit is installed between standard and minimum clearances, capacity decreases approximately 10%.

Minimum Allowable Clearance and Service Access Requirements

Proper clearance for the outdoor unit coil is critical for proper unit operation. When installing the outdoor unit, consider service, inlet and

outlet and minimum allowable space requirements as illustrated in the diagrams on the following pages.

• 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.

• If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that the discharge air of the outdoor unit isn’t

restricted.

• No obstacles to air circulation around the unit; keep proper distances from ceilings, fences, floor, walls, etc. (Install a fence to prevent

pests from damaging the unit or unauthorized individuals from accessing it.)

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Ceiling-Concealed Ducted System Engineering Manual

Minimum 11-13/16

Minimum 19-11/16"

Minimum 39-3/8"

Minimum 11-13/16"

Maximum 19-11/16"

Minimum 11-13/16

Minimum 39-3/8"

Minimum 23-19/32"

Obstacles above and on the air intake side. Obstacles above, on the air intake side,

and on both left and right sides

PLACEMENT CONSIDERATIONS

Outdoor Unit

Minimum 11-13/16

Air inlet grille

Blown

air

Strong

wind

Strong

wind

Minimum 11-13/16

Minimum 23-5/8

Sunroof

Fence or

obstacles

Minimum 11-13/16

Air inlet grille

Blown

air

Strong

wind

Strong

wind

Minimum 19-1/16

Fence or

obstacles

Unit: Inch

Minimum 11-13/16

Ensure that the space at the back of the outdoor unit is a minimum of 11-13/16 inches, and

include a minimum of 23-5/8 inches at the right side of the unit for service.

If the outdoor unit discharge side faces a wall, include a minimum of 19-11/16 inches

between the outdoor unit and the wall. Install the outdoor unit so that the discharge port is

set at a right angle to the wind direction.

Outdoor Unit (36,000 Btu/h Capacity) Service Access and Allowable Clearances

When installing the outdoor unit, consider service, inlet, and outlet, and minimum allowable space requirements as illustrated in the following

diagrams.

Clearance Requirements when Different Obstacles are Present (Unit: Inch).

Minimum 11-13/16"

Minimum 23-19/32"

Obstacle on the suction side only.

Obstacles on the suction side and

on both left and right sides.

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DUCTED | 61

Application Guidelines

Minimum 19-11/16

Minimum 19-11/16"

Minimum 39-3/8"

Obstacle just on the

air discharge side.

Obstacles 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"

Minimum 19-11/16"

Minimum 11-13/16"

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"

Minimum 19-11/16"

Minimum 11-13/16"

Table 37: Ratio among H, A, and L.

If a stand is necessary, it should be contained (not open

frame) to prevent the discharge air from short cycling.

L A

≤ H

0 < L ≤ 1/2 H 29-1/32 inches

1/2 H < L 39-3/8 inches

H < L

Set Stand as: L ≤ H

PLACEMENT CONSIDERATIONS

Outdoor Unit

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"

“L” should be lower than

“H”. If a stand is neces-

sary, it should be con-

tained (not open frame) to

prevent the discharge air

from short cycling.

Minimum 19-11/16"

Minimum 39-3/8"

Obstacle just on the

air discharge side.

Obstacles above and on the

air discharge side.

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"

Minimum 78-3/4"

Minimum 23-19/32"

Minimum 39-3/8"

Series installation

“Design Guideline Summary” on page 63

“Selecting Field-Supplied Copper Tubing” on page 64

“Refrigerant Piping System Layout” on page 65

“Piping Insulation” on page 70

“Condensate Drain Piping” on page 71

REFRIGERANT PIPING

DESIGN & LAYOUT

BEST PRACTICES

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DUCTED | 63

Refrigerant Piping Design and Best Practices

Device Connection Limitations

A single-zone ceiling-concealed ducted system consists of one outdoor unit and one indoor unit. One of the most critical elements of a sin-

gle-zone ceiling-concealed ducted system is the refrigerant piping. The table below lists pipe length limits that must be followed in the design

of a single-zone ceiling-concealed ducted refrigerant pipe system:

REFRIGERANT PIPING DESIGN

Design Guideline Summary

Table 38: Single-Zone Ceiling-Concealed Ducted Refrigerant Piping System Limitations.

System Model Name

LD097HV4, LD127HV4 LH247HV LH367HV

Pipe Length

(ELF = Equivalent Length of Pipe)

Longest total equivalent piping

length

66 feet 164 feet 246 feet

Shortest total equivalent

piping length

6.6 6.6 6.6

Distance between ttings and

indoor or outdoor units

≥20 inches ≥20 inches ≥20 inches

No additional refrigerant

25 feet 25 feet 25 feet

Elevation

(All Elevation Limitations are

Measured in Actual Feet)

If outdoor unit is above indoor

unit

49 feet 98 feet 98 feet

If outdoor unit is below indoor

unit

49 feet 98 feet 98 feet

Additional Refrigerant Needed (oz/ft)

0.22 0.43 0.43

DFS System Layout

Figure 43: Typical LD097HV4 and LD127HV4 System Layout. Figure 44: Typical LH247HV System Layout.

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

164

Max Length = A

Max Elevation = B

164

Unit = Feet

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

246

Max Length = A

Max Elevation = B

246

Unit = Feet

Figure 45: Typical LH367HV System Layout.

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Max Length = A

Max Elevation = B

Unit = Feet

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64 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

Large Tubing U-bend (>3/4 in.) Loop

Small Tubing U-bend (<3/4 in.)

Figure 46: Coiled Expansion Loops and Offsets.

Table 39: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.

Anticipated Linear Expansion (LE) (inches)

Nominal Tube Size (OD) inches

1/4 3/8 1/2 3/4

1/2

6 7 8 9

38 44 50 59

9 10 11 13

54 63 70 83

1-1/2

11 12 14 16

66 77 86 101

12 14 16 19

77 89 99 117

2-1/2

14 16 18 21

86 99 111 131

15 17 19 23

94 109 122 143

3-1/2

16 19 21 25

102 117 131 155

17 20 22 26

109 126 140 166

R = Centerline Length of Pipe.

L = Centerline Minimum Radius (inches).

Selecting Field-Supplied Copper Tubing

REFRIGERANT PIPING DESIGN

Table 40: Linear Thermal Expansion of Copper Tubing in Inches.

Pipe

Length

Fluid Temperature °F

35° 40° 45° 50° 55° 60° 65° 70° 75° 80° 85° 90° 95° 100° 105° 110° 115° 120° 125° 130°

0.04 0.04 0.05 0.06 0.06 0.07 0.08 0.08 0.09 0.09 0.10 0.10 0.11 0.11 0.11 0.12 0.13 0.14 0.15 0.15

0.08 0.08 0.10 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.22 0.23 0.26 0.28 0.29 0.30

0.12 0.12 0.15 0.18 0.20 0.21 0.23 0.24 0.26 0.27 0.29 0.30 0.32 0.33 0.32 0.35 0.39 0.42 0.44 0.45

0.16 0.16 0.20 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.43 0.46 0.52 0.56 0.58 0.60

0.20 0.20 0.25 0.30 0.33 0.35 0.38 0.40 0.43 0.45 0.48 0.50 0.53 0.55 0.54 0.58 0.65 0.70 0.73 0.75

0.24 0.24 0.30 0.36 0.39 0.42 0.45 0.48 0.51 0.54 0.57 0.60 0.63 0.66 0.65 0.69 0.78 0.84 0.87 0.90

0.28 0.28 0.35 0.42 0.46 0.49 0.53 0.56 0.60 0.63 0.67 0.70 0.74 0.77 0.76 0.81 0.91 0.98 1.02 1.05

0.32 0.32 0.40 0.48 0.52 0.56 0.60 0.64 0.68 0.72 0.76 0.80 0.84 0.88 0.86 0.92 1.04 1.12 1.16 1.20

0.36 0.36 0.45 0.54 0.59 0.63 0.68 0.72 0.77 0.81 0.86 0.90 0.95 0.99 0.97 1.04 1.17 1.26 1.31 1.35

100

0.40 0.40 0.50 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.08 1.15 1.30 1.40 1.45 1.50

120

0.48 0.48 0.60 0.72 0.78 0.84 0.90 0.96 1.02 1.08 1.14 1.20 1.26 1.32 1.30 1.38 1.56 1.68 1.74 1.80

140

0.56 0.56 0.70 0.84 0.91 0.98 1.05 1.12 1.19 1.26 1.33 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 1.76 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 2.81 2.99 3.38 3.64 3.77 3.90

280

1.12 1.12 1.40 1.68 1.82 1.96 2.10 2.24 2.38 2.52 2.66 2.80 2.94 3.08 3.02 3.22 3.64 3.92 4.06 4.20

Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com.

Due to our policy of continuous product innovation, some specications may change without notication.

DUCTED | 65

Refrigerant Piping Design and Best Practices

Definitions

Physical Pipe Length: Actual length of straight segment(s) of pipe.

Equivalent Pipe Length: Actual length of pipe plus equivalent lengths of long radius elbows, Y-branches, and valves.

1. Draft a one-line diagram of the proposed piping system connecting outdoor unit to indoor units. Follow the pipe limitations listed on page

63.

2. Calculate the physical length of each pipe segment and note it on the drawing.

3. Calculate the equivalent pipe length of each pipe segment.

Using Elbows

Field-supplied elbows are allowed as long as they are long radius and designed

for use with R410A refrigerant. The designer should be cautious with the quantity

and size of fittings used, and must account for the additional pressure losses in

equivalent pipe length calculation. The equivalent pipe length of each elbow must

be added to each pipe segment. See Table 41 for equivalent lengths.

Table 41: Equivalent Piping Length for Piping Components.

Layout Procedure

Component

Size (Inches)

1/4 3/8 1/2 5/8 3/4

Long Radius Elbow (ft.)

0.5 0.6 0.7 0.8 1.2

Field-Provided Isolation Ball Valves

It is acceptable to install field-supplied ball valves with Schrader ports at the indoor unit. Full-port isolation ball valves with Schrader ports

(positioned between valve and indoor unit) rated for use with R410A refrigerant should be used on both the liquid and vapor lines.

If valves are not installed and the indoor unit needs to be removed or repaired, the entire system must be shut down and evacuated. Position

valves with a minimum distance of three (3) to six (6) inches of pipe on either side of the valve. Valves must be easily accessible for service.

If necessary, install drywall access doors or removable ceiling panels, and position the valves to face the access door or ceiling panel open-

ing. Mount valves with adequate space between them to allow for placement of adequate pipe insulation around the valves. Recommended

best practice is to clearly label and document locations of all service valves. The equivalent pipe length of each ball valve must be added to

each pipe segment.

Figure 47: Installing Piping Above and Below an Obstacle.

Above an obstacle.

Minimum

Below an obstacle.

Obstacles

When an obstacle, such as an I-beam or concrete T, is in the path

of the planned refrigerant pipe run, it is best practice to route the

pipe over the obstacle. If adequate space is not available to route

the insulated pipe over the obstacle, then route the pipe under the

obstacle. In either case, it is imperative the horizontal section of pipe

above or below the obstacle be a minimum of three (3) times greater

than the longest vertical rise (or fall) distance.

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

on the refrigerant piping system between the outdoor unit and the indoor unit. Single Zone air-source systems are provided with redundant

systems that assure oil is properly returned to the compressor. Sight-glasses and solenoid valves may cause vapor to form in the liquid

stream. Over time, dryers may deteriorate and introduce debris into the system. The designer and installer verify the refrigerant piping sys-

tem is free of traps, sagging pipes, sight glasses, filter dryers, etc.

REFRIGERANT PIPING DESIGN

Refrigerant Piping System Layout

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66 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

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.

Figure 48: Installing an Insert Into a

Concrete Beam.

Inserts and Pipe Supports

Inserts

An insert can be installed into a floor or beam before the concrete sets so that fittings such as ducts,

pipes, or suspension bolts can be added at a later time. Decide where the inserts should be placed

before support installation.

Concrete Beam

Insert

Suspension Bolt

Anti-vibration Material

Nail

Figure 49: Typical Pipe Support Location—Change in Pipe Direction.

A properly installed pipe system should be adequately supported to avoid pipe sagging. Sagging pipes

become oil traps that lead to equipment malfunction.

Figure 50: Pipe Support at Indoor Unit.

Pipe Supports

Pipe supports should never touch the pipe wall; supports shall be installed outside (around) the primary

pipe insulation jacket (see Figure 51). Insulate the pipe first because pipe supports shall be installed

outside (around) the primary pipe insulation jacket. Clevis hangers should be used with shields between

the hangers and insulation.

Field provided pipe supports should be designed to meet local codes. If allowed by code,

use fiber straps or split-ring hangers 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 insula-

tion). 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 where

potential sagging could occur. Maximum spacing of pipe supports must meet local codes.

If local codes do not specify pipe support spacing, pipe must be supported a maximum of

five feet (5′) on center for straight segments of pipe up to 3/4" outside diameter size.

Wherever the pipe changes direction, place a hanger within twelve (12) inches on one side

and within twelve to nineteen (12 to 19) inches of the bend on the other side as shown in Figure 49.

Figure 51: Pipe Hanger Details.

Max. 12"

~ 12" – 19"

A + B ~ 12" – 19"

Refrigerant Piping System Layout

INSTALLATION & LAYOUT BEST PRACTICES

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DUCTED | 67

Refrigerant Piping Design and Best Practices

40 in40 in

Inside wall (concealed)

Floor (fire-resistance)

Area between fire-resistant

insulation and boundary wall

Roof pipe shaft

Outside wall

Outside wall (exposed)

Sleeve

Insulation

Lagging

Caulk

Band

Water-resistant layer

Sleeve with edge

Lagging

Mortar or other fire-resistant caulk

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.

( Do not use a vinyl cover.)

Pipe Sleeves at Penetrations

LG requires that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an ap-

propriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve.

Underground refrigerant pipe shall be routed inside a protective sleeve to prevent insulation deterioration.

Figure 52: Pipe Sleeve Options.

Diameter of penetrations shall be determined by pipe diameter plus the thickness of the insulation.

Vapor Line

Liquid Line

Min. 18 Gauge

Cable

Power/Communication

e 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 refrigerant pipe must

be located at a level below the frost line.

Figure 53: Typical Arrangement of Refrigerant Pipe and Cable(s) in a

Utility Conduit.

Table 42: Utility Conduit Sizes.

OD pipe diameter in inches; Values in parenthesis () indicate OD of pipe with insulation jacket.

Diameter of pipe with insulation. Thickness of pipe insulation is typical. Actual required thickness may

vary based on surrounding ambient conditions and should be calculated and specified by the design

engineer.

Insulation thickness (value in parenthesis) = 3/8 inch.

Insulation thickness (value in parenthesis) = 1 inch.

Insulation thickness (value in parenthesis) = 3/4 inch.

Liquid Pipe

Vapor Pipe

1/2 (2.0

2,5

) 5/8 (2-1/8

2,5

) 3/4 (2-1/4

2,5

)

1/4 (1.0)

4 4 4

3/8 (1-1/8)

4 4 5

1/2 (1-1/2)

5 5 5

5/8 (1-5/8)

5 5 5

3/4 (1-3/4)

5 5 5

Table 43: Outdoor Unit Refrigerant Pipe Connections.

System Model No. Liquid Conn. (in., O.D.) Vapor Conn. (in., O.D.)

Low Static

LD097HV4, LD127HV4 1/4 3/8

High Static

LH247HV, LH367HV 3/8 5/8

Refrigerant Piping System Layout

INSTALLATION & LAYOUT BEST PRACTICES

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REFRIGERANT PIPING DESIGN

Refrigerant Piping System Layout

Piping can be installed

in one of four different

layouts.

Single Zone Ducted Outdoor Unit Connections

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

2. Align the center of the refrigerant pipe and corresponding connection.

3. Place a couple of drops of refrigerant oil on the opening rim of the flare before assembling. Ensure you do not add any contaminants.

Tighten the flare nut initially by hand.

4. Finish tightening the flare nut with a torque wrench until the wrench clicks. See page 69 for torque information.

Figure 54: Removing the Refrigerant Piping

Connection Cover (LUU097HV, LUU127HV).

Figure 55: Removing the Refrigerant Piping

Connection Cover (LUU247HV).

Figure 56: LUU097HV, LUU127HV, LUU247HV

Refrigerant Piping Connections.

Outdoor unit

Gas side piping

(Bigger diameter)

Liquid side piping

(Smaller diameter)

Torque wrench

Connection cover

When tightening the are nut with a torque wrench, ensure the direction for tightening follows the arrow on the wrench.

Tubing cover

Figure 58: LUU367HV Refrigerant Piping Connections.

Figure 57: Ceiling-Concealed Ducted Refrigerant Piping Connections.

Liquid Piping

Connection

Insulation for Refrigerant Piping

(Field-Supplied)

Vapor Piping Connection

Insulation

(Field-Supplied)

Clamp for Insulation

(Field-Supplied)

Ensure no gaps are present.

Overlap the Insulation at the

Connection

Insulation for Refrigerant Piping

(Field-Supplied)

Insulation for Field-Installed Piping

(Field-Supplied)

Single Zone Ducted Indoor Unit

Connections

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DUCTED | 69

Refrigerant Piping Design and Best Practices

REFRIGERANT PIPING DESIGN

Refrigerant Piping System Layout

Brazing Practices

All joints are brazed in the field. Single Zone Ducted refrigeration system com-

ponents contain very small capillary tubes, small orifices, electronic expansion

valves, oil separators, and heat exchangers that can easily become blocked.

Proper system operation depends on the installer using best practices and utmost

care while assembling the piping system.

• While brazing, use a dry nitrogen purge operating at a minimum pressure of three

(3) psig and maintain a steady flow.

• Blow clean all pipe sections with dry nitrogen prior to assembly.

• Do not use a saw to cut pipe; 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.

• Do not use flux, soft solder, or anti-oxidant agents.

• Use a 15% silver phosphorous copper brazing alloy to avoid overheating and produce good flow.

• Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or a

heat barrier spray product.

Pressure-reducing

Valve

Packless

Valve

Tape

Nitrogen

Pipe to

be brazed

Refrigerant

Piping

Figure 59: Refrigerant Pipe Brazing.

Keep the piping system free of contaminants and debris 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 44 for the amount of

torque to use, tighten the flare nut with a torque wrench until the

wrench clicks.

4. When flare is sufficiently tightened and the system has been

tested for refrigerant leaks, wrap insulation around the

connection.

Indoor Unit

Piping

Field-Supplied

Piping

Flare Nut

Piping O.D. (in.) Torque (lbs. / ft.)

1/4 13-18

3/8 24.6-30.4

1/2 39.8-47.7

5/8 45.6-59.3

3/4 71.6-87.5

Indoor Unit Piping

Flare Nut

Field-Supplied

Piping

Figure 60: Flare Connection, Isometric View.

Figure 61: Flare Connection, Side View.

Table 44: Torque Wrench Tightening.

• Improperly installed flare connections can lead to refrigerant leaks.

• When tightening the flare unit with a torque wrench, ensure the direction for tightening follows the arrow on the wrench.

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REFRIGERANT PIPING DESIGN

Refrigerant Piping System Layout

Charging

Each outdoor unit is factory charged (nameplate charge) for the

evaporator as well as a standard 24.6 foot line. Any time a line set is

used longer then the standard 24.6 foot line set length, the refriger-

ant charge has to be adjusted.

You must adjust the charge based on how many feet of piping are

added based on 0.22 or 0.43 oz. of R410A per foot (depends on the

system). The factory charge accommodates pipe lengths up to the

standard length without requiring refrigerant removal.

Example: A 50 ft line set is used --

9 additional feet x 0.22 oz per ft = Add 1.98 oz

of R410A

If you are uncertain of the unit charge, reclaim, evacuate and weigh in

the correct charge using the unit nameplate (capacity) charge adjusting

for line sets longer than 24.6 or 41 ft. This will prevent any interruptions

to the functioning of the unit and possible damage.

Capacity

(Btu/h)/Model

Pipe Size

Standard

Length (ft)

Max.

Elevation (ft)

Max.

Length (ft)

Min.

Length (ft)

Additional

Refrigerant (oz/ft)

Vapor Liquid

9k LD097HV4,

12k LD127HV4

3/8 1/4 24.6 49 66 6.6 0.22

24k LH247HV 5/8 3/8 24.6 98.4 164 6.6 0.43

36k LH367HV 5/8 3/8 24.6 98.4 246 6.6 0.43

Table 45: Charging Capacity.

Refrigerant Piping System Insulation

All refrigerant piping including connections, field-provided isolation ball valves, service valves, and elbows shall be completely insulated

using closed cell pipe insulation.

To prevent heat loss/heat gain through the refrigerant piping, all refrigerant piping including liquid lines and vapor lines shall be insulated sep-

arately. Insulation shall be a minimum 1/2″ thick, and thickness may need to be increased based on ambient conditions and local codes.

All insulation joints shall be glued with no air gaps. Insulation material shall fit 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 the sun and outdoor elements shall be properly protected with PVC,

aluminum vapor barrier, or alternatively placed in a weather-resistant enclosure such as a pipe rack with a top cover; and meet local codes.

Pay special attention to insulating the pipes installed in the ceiling plenum.

The design engineer should perform calculations to determine if the factory-supplied insulation jackets are sufficient to meet local codes and

avoid sweating. Maximum refrigerant piping temperature is +227°F; minimum refrigerant piping temperature is -4°F. Add additional insulation

if necessary. Check the fit of the insulation jacket after the header fitting and all run-out pipes are installed. Mark all pipes at the point where

the insulation jacket ends. Remove the jacket. Install field provided insulation on the run-out and main trunk pipes first. Install the LG-pro-

vided 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.

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Refrigerant Piping Design and Best Practices

REFRIGERANT PIPING DESIGN

Condensate Drain Piping

Condensate drain piping should be constructed out of materials approved by local codes (generally PVC). Drain piping must have downward

gradient of at least 1/50 to 1/100; to prevent reverse flow, slope should not be straight up and down, and support hangers should be used at

3-5/16 to 5 foot intervals to keep the condensate drainage system stable.

The inside temperature of the drain piping can rise to about 50°F. When high temperature and humidity air touch the outside surface of the

drain pipe, condensation may form. To prevent condensation from forming, install polyethylene insulation 1/4 to 7/16 inches thick. Drain

piping must be properly insulated to prevent damage to the indoor unit and the ceiling.

Test the condensate drain piping system for leaks 24 hours after installation is complete. Use only water to test the drain piping.

Outdoor Units

See pages 56 to 61 for information in reference to outdoor unit placement and condensate drainage.

Indoor Units

Ceiling-Concealed Ducted indoor units include a factory-installed drain pump. Depending on the location of the indoor unit, condensation can

be drained directly to the outside of the building, or tied into a drainage piping system.

Table 46: Drain Piping Specications.

Indoor Unit

Drain Pipe Dia. (inches)

(External / Internal)

Drain Pump Drain Lift Height (inches)

Amount of Drainage (gpm)

(at 0.4 inches high)

Ceiling Concealed Ducted 1-1/4 / 1 Standard 27-9/16 0.106

Figure 62: Condensate Drain Piping Trap.

Models with drain pump

Models without drain pump

Polyethylene insulation 10t

PVC drain pipe

Metal clamp

Drain pan

Thermal insulation(bend area)

Flexible drain hose

Thermal insulation (drain pipe area)

Flexible hose

Drain pump

PVC elbow

PVC

Max.

31-1/2 inches

11-13/16 inches or less

Common drain pipe

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72 | DUCTED

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ELECTRICAL CONNECTIONS

LUU097HV, LUU127HV, LUU187HV, LUU247HV Outdoor

Unit Connections

1. Remove the cover or control cover from the unit by loosening the

fastening screws.

2. Take off the caps on the conduit panel.

3. Connect both the power supply and low voltage lines to the

corresponding terminals on the terminal block.

4. Be sure to ground the unit by following local codes.

5. Allow for enough length (add several inches) for each wiring.

6. Secure the cable with the cord clamp.

7. Secure conduit tubes with lock nuts.

8. Reattach the control cover to the original position with the

fastening screws.

Terminal Block

Connecting

Cable

Power

Supply

Cord

Conduit Panel

Tubing Cover

Over 0.2”

LUU367HV Outdoor Unit Connections

1. Remove the side panel.

2. Use the clamp to attach the wiring / cable.

Figure 63: LUU097, 127HV Outdoor Unit Terminal Block Location.

Terminal block

Over 0.2”

Control cover

Conduit panel

Connecting

cable

Power supply

cord

Figure 64: LUU247HV Outdoor Unit Terminal Block Location. Location.

When connecting the power wiring /

communication cables, make sure

the rubber bushing is properly inserted

in the access holes after removing the insulation.

Insulation

Main

Terminal

Block

Clamps

Clamp

Outdoor Unit Power Wiring / Communications Cable Connections

Figure 65: LUU367HV Outdoor Unit Terminal Block

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DUCTED | 73

Electrical Connections and Mechanical Specs

ELECTRICAL CONNECTIONS

Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.

Figure 66: Circuit Breaker/Time Delay Fuse

Connection.

Air

Conditioner

Main Power Source

Circuit Breaker

Use a circuit breaker

Or time delay fuse

Ducted Indoor Unit Power Wiring / Communications Cable Connections

Lock Nut

Conduit

Mounting

Plate

Conduit

1(L1) 2(L2)

3(A) 4(B)

Power Supply

(208-230V)

Communication

1. To access the terminal block, first detach the cover from the control box.

2. Insert the power wiring / communications cable from the outdoor unit through the

sides of the indoor unit and control box. Pass the wiring through the designated

access holes to prevent damage. To prevent electromagnetic interference and

product malfunction, leave a space between the power wiring and communications

cable outside of the indoor unit. (For power wiring / communications cable between

the single zone outdoor unit and the indoor unit, use a four-conductor, stranded,

shielded or unshielded wire. If shielded, the wire must be grounded to the chassis

at the outdoor unit only.)

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. Secure the power wiring / communications cable with the cable restraint.

5. Reattach the steel clamp to the inside of the control panel.

• Place the wiring / cables in the clamp and tighten the plastic clamp to an open surface of the control panel.

• Do not apply force to the wiring connections when clamping.

• Neatly arrange the wiring. Do not catch the wiring in the electric box cover. Ensure the cover firmly closes.

6. Fill in any gaps around the wiring access holes with sealant to prevent foreign particles from entering the indoor unit.

Figure 67: Accessing the Indoor Unit Terminal Block.

Control Box

Terminal Block

Control Box Cover

1(L1)2(L2) 3

Power Wiring

Connections

Lock nut

Conduit

mounting

plate

Conduit

Using a Conduit

1. Remove the rubber stopper on the indoor unit.

Pass the power wiring / communications cable

through the conduit, the conduit mounting

plate, and to / through the control panel of the

indoor unit.

2. Connect the power wiring / communications

cable to the indoor unit terminal block.

3. Screw the conduit mounting plate to the

indoor unit.

4. Tighten the conduit and the conduit mounting

plate together.

Figure 68: Ducted Indoor Unit Terminal Block Location / Using a Conduit.

• Separately wire the high and low voltage lines. There is a risk of electric shock, physical

injury, or death.

• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid

wiring malfunction and electrical shock, which may cause physical injury or death.

• Ensure you connect the wire firmly. Loose wiring may cause unit malfunction, the wires

to burnout or the terminal to overheat and catch fire. There is a risk of electric shock,

physical injury or death.

• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid electrical

shock, which may cause physical injury or death.

• Separately wire the high and low voltage lines to avoid damage to unit.

• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid damage to unit.

• Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.

• Connect the wire firmly. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is

a risk of equipment malfunction or property damage.

• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid damage

to the unit.

• Comply with local codes while running wire from the indoor unit to the outdoor unit.

•

Do not allow wire to touch refrigerant tubing, the compressor or any moving parts since it can lead to mechanical failure.

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ELECTRICAL CONNECTIONS

Wiring Connections

• Power wiring and communications cable sizes must comply with applicable federal UL / ETL, state, and local codes.

• Separately wire the high and low voltage lines to avoid damage to unit.

• Local codes may require field-installed disconnect switches from outdoor unit to indoor unit.

• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid damage to unit.

• Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.

• Firmly connect the wire. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There

is a risk of equipment malfunction or property damage.

• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid dam-

age to the unit.

• Comply with local codes while running wire from the indoor unit to the outdoor unit.

• Do not allow wire to touch refrigerant tubing, the compressor or any moving parts since it can lead to mechanical failure.

Figure 69: Detailed Power / Communications System Schematic.

Power Supply

Main Switch

Circuit Breaker

Fuse

Power Wiring

(Including Ground)

Outdoor Unit

1(L1) 2(L2)

Terminal Block Outdoor

1(L1) 2(L2) 3

Terminal Block Outdoor

Communication

Cable

1(L1) 2(L2)

Terminal Block Indoor

Indoor Unit

Power

Wiring

TECHNICAL DATA

“Mechanical Specifications” on page 76

“Acronyms” on page 78

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76 | DUCTED

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MECHANICAL SPECIFICATIONS

Ceiling-Concealed Ducted System

General

System

LG single zone ceiling-concealed ducted system comprises of a

single frame outdoor unit connected to a single indoor unit with a

single refrigerant circuit. An LG single zone ceiling-concealed ducted

system is a DFS system that can operate in either cooling or heating

mode. The system is capable of changing mode within a maximum

time of three (3) minutes to ensure indoor temperature can be

properly maintained. LG components are manufactured in a facility

registered to ISO 9001 and ISO 14001, which is a set of standards

applying to environmental protection set by the International orga-

nization for Standardization (ISO). The system components comply

with Underwriters Laboratories (UL) 1995 Heating and Cooling

Equipment Standard for Safety and bear the Electrical Testing Labo-

ratories (ETL) label. Wiring in these units are in accordance with the

national Electrical Code (NEC). LG single zone ceiling-concealed

ducted systems have published performance ratings certified by

AHRI (Air-Conditioning, Heating, and Refrigeration Institute) and are

listed in the AHRI Standard 210/240 certified product directory.

Outdoor Unit

The outdoor unit has sound levels not exceeding 54 dB(A) tested in

an anechoic chamber under ISO Standard 3745.

Indoor Unit

Ceiling-Concealed Ducted units are designed for air volume against

an external static pressure up to 0.20″WG for the 9,000 and 12,000

Btu/h models, up to 0.78″WG for the 24,000 Btu/h model; up to

0.6″WG for the 36,000 Btu/h model.

Temperature Ranges

9,000 and 12,000 Btu/h Low Static Operating Ranges

• Operating ranges for outdoor units of 0°F to +118°F (DB) for

cooling (Cooling range can be extended from 0°F down to -4°F

using the Low Ambient Wind Baffle Kit [sold separately]); -4°F to

+64°F (WB) for heating.

• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;

59°F to 81°F (DB) for heating.

• Indoor unit temperature setting range of 65°F to 86°F (DB) for

cooling; 61°F to 86°F (WB) for heating.

24,000 and 36,000 High Static Operating Ranges

• Operating ranges for outdoor units of 5°F to +118°F (DB) for

cooling; 0°F to +64°F (WB) for heating.

• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;

59°F to 81°F (DB) for heating.

• Indoor unit temperature setting range of 65°F to 86°F (DB) for

cooling; 61°F to 86°F (WB) for heating

Casing /

Frame

Outdoor Unit

The outdoor condensing

unit case is constructed

from pre-coated metal

(PCM) that has been

tested in accordance

with ASTM B-117 salt

spray procedure for

a minimum of 1,000

hours. Case has a re-

movable panel to allow

access to major internal

components, and legs

to secure the unit during

installation.

Indoor Unit

The indoor unit casing is designed to mount fully concealed above

a finished ceiling. Casing is manufactured of galvanized steel plate.

Cold surfaces of the unit are covered internally with a coated polysty-

rene insulating material, and covered externally with sheet insulation

made of ethylene propylene diene monomer (M-Class) (EPDM).

External insulation is plenum rated and conforms to ASTM Standard

D-1418. Hanger brackets are included on the casing to support the

weight on four corners. The indoor unit has a front horizontal supply

air discharge, and one dedicated rear horizontal return air. The sup-

ply air opening is flanged to accept field-installed ductwork that shall

not exceed the external static pressure limitation of the unit.

Refrigerant System

System is designed for use with R410A refrigerant, and consists of a

single refrigeration circuit. The refrigeration circuit is pressure-tested

at the factory and shipped with a holding charge of helium gas. The

outdoor unit is provided with factory installed components, includ-

ing a refrigerant strainer, accumulator, four-way reversing valve,

electronic expansion valve (EEV), high and low side charging ports,

service valves, and interconnecting piping. All refrigerant lines from

the outdoor unit to the indoor unit are field-installed and must be

insulated separately.

Compressors

The outdoor unit is equipped with one hermetically sealed, digitally

controlled, inverter-driven twin rotary compressor to modulate capac-

ity (variable from 20 to 100 Hz, modulate in 1 Hz increments). Teflon

coated bearings, overcurrent protection and vibration isolation are

integrated with the compressor.

Figure 70: Ceiling-Concealed Ducted

System (LH247HV High Static Model).

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DUCTED | 77

Electrical Connections and Mechanical Specs

Coil

Outdoor Unit

Heat pump outdoor unit coils are made of nonferrous louvered

aluminum fins protected with an integral coil guard. The coil for each

outdoor unit has a minimum of 14 fins per inch (FPI); heat exchanger

has two rows. The coil fins have a factory applied corrosion resistant

GoldFin™ material with hydrophilic coating tested in accordance with

ASTM B-117 salt spray test procedure for a minimum of 1,000 hours.

Coils are factory tested to a pressure of 551 psig.

Indoor Unit

Indoor unit coils are factory built and are comprised of aluminum fins

mechanically bonded to copper tubing. Each indoor unit has a mini-

mum of three rows of coils, which are pressure tested to 551 psig at

the factory. Each unit is provided with a factory installed condensate

drain pan below the coil.

Fans and Motors

Outdoor Unit

The 9,000 Btu/h (LUU097HV) and 12,000 Btu/h (LUU127HV),

and 24,000 Btu/h (LUU247HV) outdoor units include one direct

drive, variable speed axial / propeller type fan with a horizontal air

discharge; the 36,000 Btu/h outdoor unit (LUU367HV) includes two

fans. Fan blades are made of Acrylonitrile Butadiene Styrene (ABS)

material, and have a Brushless Digitally Controlled (BLDC) fan

motor. The fan motor has inherent protection, permanently lubricated

bearings, and variable speed with a maximum speed up to 950 rpm.

Raised guards are provided to limit contact with moving parts.

Indoor Unit

The 9,000 Btu/h (LDN097HV4), 24,000 Btu/h (LHN247HV), and

36,000 Btu/h (LHN367HV) indoor units have two direct-drive, Sirocco

fans made of high strength ABS GP-2200 polymeric resin; the

12,000 Btu/h (LDN127HV4) has three direct-drive Sirocco fans. The

fans are statically and dynamically balanced, mounted on a com-

mon brushless digitally controlled (BLDC) motor, and mounted on

vibration-attenuating rubber grommets. Fan speed is controlled using

a microprocessor-based direct digital control algorithm. The indoor

fan has Low, Med, High, and Auto settings for Cooling mode; and

has Low, Med, High, and Auto settings for Heating mode. The Auto

setting adjusts the fan speed based on the difference between the

controller set-point and space temperature.

Air Filter -

Indoor Unit

The return air inlet on

the indoor unit includes a

factory-supplied remov-

able, washable filter that is

accessible from the back

of the unit. Options include

a return filter box that

holds a field-provided high

efficiency one or two inch

MERV-rated filters, and a

LG-supplied air cleaner

(each sold separately).

Electrical

The system was de-

signed to operate using

208–230/60/1 power with

voltage variances of ±10%

and includes overcurrent

protection. The indoor unit is powered through the outdoor unit.

Controls

Indoor and outdoor units are factory wired with necessary electrical

control components, printed circuit boards, thermistors, sensors,

terminal blocks, and lugs for power wiring. Factory installed micro-

processor controls in the outdoor unit and indoor unit shall perform

functions to efficiently operate the single zone system, communi-

cating via an 18 AWG four stranded and shielded conductor power/

transmission cable. Microprocessor-based algorithms provide com-

ponent protection, soft-start capability, refrigeration system pressure,

temperature, defrost, and ambient control. System can be operated

through a simple wired remote controller supplied with the duct (high

static) indoor unit.

Condensate Lift/Pump

The indoor unit is provided with a factory installed and wired

condensate lift/pump capable of providing a minimum 27-9/16 inch

lift from the bottom surface of the unit. Drain pump has a safety

switch to shut off the indoor unit if the condensate rises too high in

the drain pan.

Figure 71: Ceiling-Concealed Duct

(High Static) System (LH367HV Model).

MECHANICAL SPECIFICATIONS

Ceiling-Concealed Ducted System

Due to our policy of continuous product innovation, some specications may change without notication.

78 | DUCTED

Ceiling-Concealed Ducted System Engineering Manual

ACRONYMS

Table 47: Table of Acronyms.

ABS

Acrylonitrile Butadiene Styrene

Kilo Watts

Air Conditioner

LED

Light Emitting Diode

ACP

Advanced Control Platform

LEED

Leadership in Energy and Environmental Design

ASHRAE

American Society of Heating, Refrigeration, and

Air-Conditioning Engineers

MBh

Thousands BTUs per hour

AWG

American Wire Gauge

MCA

Maximum Circuit Ampacity

BLDC

Brushless Digitally Controlled

MOP

Maximum overcurrent Protection

Btu/h

British Thermal Units per hour

MSC

Maximum Starting Current

BUS

Binary Unit System

Noise Criterion (regarding Sound Pressure Levels)

CFM

Cubic Feet per Minute New Construction (LEED Related)

Dry Bulb Normally Closed

dB(A)

Decibels with “A” frequency weighting

NEC

National Electrical Code

DDOAS

Decoupled Dedicated Outdoor Air System

No.

Number

Digital Input

ODU

Outdoor Unit

DFS

Duct Free Split

PCB

Printed Circuit Board

Digital output

PCM

Pre-Coated Metal

DPST

Double-Pole Single-Throw (switch)

PDI

Power Distribution Indicator

EEV

Electronic Expansion Valve

Power Input

ELF

Equivalent Length in Feet

Prerequisite (LEED Related)

ETL

Electronic Testing Laboratories

PVC

Polyvinyl Chloride

H/M/L

High/Medium/Low

SW or S/W

Switch

HIPS

High Impact Polystyrene

USB

Universal Serial BUS

HVAC

Heating,Ventilation and Air Conditioning

VAC

Voltage Alternating Current

Innovations in Design (LEED Related)

VRF

Variable Refrigerant Flow

IDU

Indoor Unit

Wet Bulb

ISO

International organization for Standardization

EM_SZ_Ducted_5_16

Supersedes: DFS-EM-AM-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.

LG Electronics, U.S.A., Inc.

Commercial Air Conditioning Division

4300 North Point Parkway

Alpharetta, Georgia 30022

LG Electronics LD127HV4 Air Conditioner

Product's Documents

User Manual

Specifications

LG Electronics LD127HV4 Questions and Answers

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