LG Electronics LC097HV4 Air Conditioner User Manual

SINGLE-ZONE FOUR-WAY

CEILING-CASSETTE SYSTEM

ENGINEERING MANUAL

Single-Zone Four-Way

Ceiling Cassette

Heat Pump Systems

3/4 to 3-1/2 Tons

LC187HV (18,000 Btu/h)

LC247HV (24,000 Btu/h)

LC367HV (36,000 Btu/h)

LC427HV (42,000 Btu/h)

LC097HV4 (9,000 Btu/h)

LC127HV4 (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.

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

different 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 Four-Way Ceiling Cassette air-source systems offer

the opportunity to minimize ductwork in the same configuration. The

system offers zoning without the need for zone damper systems.

The LG Single Zone Four-Way Ceiling Cassette system’s advanced

controls provide exceptional building dehumidification and tempera-

ture control, and can rapidly adapt system operating parameters

to the ever changing building load. The LG Single Zone Four-Way

Ceiling Cassette system is easy to design, install, and maintain.

The modular design allows occupants to control their environmental

condition, providing individualized control of the setpoint temperature

and allowing occupants to condition only the occupied zones.

Quality Commitment

LG is committed to the success of Duct-Free Split 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.

INTRODUCTION | 3

Introduction

TABLE OF CONTENTS

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

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

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

Four-Way Ceiling Cassette System Data................................................................................................................................................................. 7-35

Product Features and Benets ..................................................................................................................................................................................... 8

General Data ........................................................................................................................................................................................................... 9-12

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

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

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

Air Velocity and Temperature Distribution .............................................................................................................................................................. 22-24

Refrigerant Flow Diagrams .................................................................................................................................................................................... 25-28

Wiring Diagrams .................................................................................................................................................................................................... 29-33

Accessories ........................................................................................................................................................................................................... 34-35

Performance Data .................................................................................................................................................................................................... 36-46

Cooling Capacity Tables ........................................................................................................................................................................................ 37-42

Heating Capacity Tables ........................................................................................................................................................................................ 43-45

Application Guidelines ............................................................................................................................................................................................ 47-62

Equipment Selection Procedure ............................................................................................................................................................................ 48-49

Building Ventilation Design Guide ......................................................................................................................................................................... 50-54

Placement Considerations ..................................................................................................................................................................................... 55-62

Refrigerant Piping Design & Layout Best Practices ............................................................................................................................................ 63-72

Design Guideline Summary ........................................................................................................................................................................................ 64

Selecting Field-Supplied Copper Tubing ............................................................................................................................................................... 65-66

Refrigerant Piping System Layout ......................................................................................................................................................................... 66-70

Piping Insulation ......................................................................................................................................................................................................... 71

Condensate Drain Piping ............................................................................................................................................................................................ 72

Electrical and Mechanical Specications ............................................................................................................................................................. 73-78

Electrical Connections ........................................................................................................................................................................................... 73-75

Mechanical Specications ..................................................................................................................................................................................... 77-78

Acronyms ...................................................................................................................................................................................................................... 79

TABLE OF SYMBOLS

DANGER

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

serious injury.

WARNING

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.

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

4 | INTRODUCTION

Four-Way Ceiling Cassette System Engineering Manual

INTRODUCTION

“Architectural Appeal” on page 6

Convergence of Technological Innovation with Flexibility and Style

ARCHITECTURAL APPEAL

Single-Zone Four-Way Ceiling-

Cassette Systems

A four-way ceiling-cassette system provides a system designer an

edge to engineer a system with many user-adjustable settings. Four-

way ceiling cassette systems features a ceiling-recessed indoor unit

case and an off-white architectural grille (required; sold separately)

that is flush mounted, providing a clean look to the room. These sys-

tems are 208-230V/60Hz/1PH systems, available in nominal capaci-

ties of 3/4, 1, 1-1/2, 2, 3, and 3-1/2 tons, and are best suited in light

commercial applications or large, open spaces. The ceiling cassette

indoor unit is a useful alternative when wall space is limited.

Benefits of Four-Way Ceiling Cassette Systems

• Inverter technology

• Available in 9,000, 12,000, 18,000, 24,000, 36,000, 42,000 Btu/h

capacities

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

heating capabilities

• Operating ranges for 9,000 and 12,000 Btu/h 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 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 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 18,000, 24,000, 36,000, 42,000 Btu/h

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

(WB) for heating

• Operating ranges for 18,000, 24,000, 36,000, 42,000 Btu/h

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 18,000, 24,000, 36,000,

and 42,000 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 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 operates

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

energy.

Adaptable and Flexible

Four-way ceiling-cassette 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: Four-Way Ceiling Cassette System.

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

6 | INTRODUCTION

Four-Way Ceiling Cassette System Engineering Manual

PRODUCT DATA

“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

“Air Velocity and Temperature Distribution” on page 22

“Refrigerant Flow Diagrams” on page 25

“Wiring Diagrams” on page 29

“Accessories” on page 34

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

8 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

PRODUCT FEATURES AND BENEFITS

Four-Way Ceiling Cassette Systems

Single zone four-way ceiling cassette systems are equipped with

inverter components that offer superior load matching and long

piping installation. The product works for optimizing power consump-

tion in residential and small office buildings. Using a four-way ceiling

cassette indoor unit with custom temperature controls allow for

precise temperature settings in each zone of the building. Four-way

ceiling cassette indoor units allow flexibility in interior design and

complement any decor.

Lower Sound Levels

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

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

promote a quiet, comfortable environment, four-way ceiling cassette

indoor units operate as low as 30 dB(A) at low speed. LG custom-

ers often ask if the outdoor unit is running after commissioning is

complete. All rotating components are soft-started using digitally

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 pro-

viding 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 out-

door unit responds by varying the compressor speed and fan motors

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

four-way ceiling cassette 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 four-way ceiling cassette 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 four-way ceiling cassette system simplifies 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

Four-way ceiling cassette systems are available in 9,000, 12,000,

18,000, 24,000, 36,000, and 42,000 Btu/h capacities.

9,000 and 12,000 Btu/h Operat-

ing 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 cool-

ing; 61°F to 86°F (WB) for heating.

18,000, 24,000, 36,000, and

42,000 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

Clean Finish

The four-way ceiling cassette indoor unit case is recessed, while

the off-white architectural grille (required, sold separately) is flush

mounted, providing a clean look to the room.

Heat Transfer Efficiency

Fin Design with GoldFin™ Coating

All four-way ceiling cassette 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 outdoor coil

fin surface is coated with LG’s exclusive GoldFin™ anti-corrosive

coating designed to prevent natural surface corrosion of the alumi-

num 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 during 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

• Five fan speeds

• Auto restart

• Auto changeover

• Swirl Wind

• Internal condensate pump

included

• Precision Load Matching

• Follows AHRI 210/240

FOUR-WAY CASSETTE | 9

Product Data

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

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:

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

10 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Outdoor Unit Model Indoor Unit Model Controller

LUU097HV

LUU127HV

LCN097HV4

LCN127HV4

PQWRHQ0FDB

LUU187HV

LUU247HV

LCN187HV

LCN247HV

PQWRHQ0FDB

LUU367HV

LUU427HV

LCN367HV

LCN427HV

PQWRHQ0FDB

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

Table 1: Four-Way Ceiling Cassette System Pairing Table

GENERAL DATA

Four-Way Ceiling Cassette Pairing Table

FOUR-WAY CASSETTE | 11

Product Data

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

GENERAL DATA / SPECIFICATIONS

Type Single Zone Four-Way Ceiling Cassette

System (Model) (Indoor Unit / Outdoor Unit) LC097HV4 (LCN097HV4 / LUU097HV) LC127HV4 (LCN127HV4 / LUU127HV)

Ceiling Grille Model Number (Sold Separately) PT-QCHW0 / PT-UQC PT-QCHW0 / PT-UQC

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

3,600 ~ 9,000 ~ 9,900 3,400 ~ 11,100 ~ 12,400

Cooling Power Input

(kW)

0.19 ~ 0.66 ~ 0.83 0.25 ~ 0.88 ~ 1.1

EER (OD 95°F)

13.65 12.6

SEER

20.2 19.4

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

4,400 ~ 11,000 ~ 12,100 2,800 ~ 14,000 ~ 15,500

Heating Power Input

(kW)

0.15 ~ 0.83 ~ 1.05 0.22 ~ 1.19 ~ 1.5

COP (OD 47°F)

3.88 3.44

HSPF

10.5 10.4

Rated Low Heating Capacity (Btu/h)

Outdoor 17°F (WB)/Indoor 70°F (DB)

7,000 9,100

Low COP (OD 17°F)

2.92 2.7

Maximum Heating Capacity (Btu/h)

Outdoor 17°F (WB)/Indoor 70°F (DB)

9,350 (85%) 11,900 (85%)

Outdoor 5°F (WB)/Indoor 70°F (DB)

8,250 (75%) 10,500 (75%)

Outdoor -4°F (WB)/Indoor 70°F (DB)

7,040 (64%) 8,960 (64%)

Power Supply V, Ø, Hz

208-230 / 1 / 60

Outdoor Unit Operating Range

Cooling (°F DB)

0 to +118

Heating (°F WB)

-4 to +64 -4 to +64

Indoor Unit Operating Range

Cooling (°F WB)

57 to 77 57 to 77

Heating (°F DB)

59 to 81 59 to 81

Indoor Temperature Setting Range

Cooling (°F DB)

65 to 86 65 to 86

Heating (°F WB)

61 to 86 61 to 86

Unit Data

Refrigerant Type

R410A

Refrigerant Control

EEV

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

36 / 33 / 30 38 / 35 / 32

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

47 / 51 49 / 52

Indoor Unit Net / Shipping Weight (lbs.)

31 / 37 31 / 37

Outdoor Unit Net / Shipping Weight (lbs.)

82 / 89 82 / 89

Grille Net / Shipping Weight (lbs.)

7 / 9 7 / 9

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.)

1.6 2.47

Fan

Indoor Unit Type x Qty.

Turbo x 1

Outdoor Unit Type x Qty.

Axial x 1

Motor / Drive

Brushless Digitally Controller / Direct

Airflow Rate

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

300 / 265 / 230 335 / 283 / 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.)

Maximum Elevation Difference (ft.)

Table 2: Four-Way Ceiling Cassette System General Data.

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

difference 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

operation.

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).

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

12 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

GENERAL DATA / SPECIFICATIONS

Type Single Zone Four-Way Ceiling Cassette

System (Model) (Indoor Unit / Outdoor Unit)

LC187HV

(LCN187HV /

LUU187HV)

LC247HV

(LCN247HV /

LUU247HV)

LC367HV

(LCN367HV /

LUU367HV)

LC427HV

(LCN427HV /

LUU427HV)

Ceiling Grille Model Number (Sold Separately)

PT-UMC1B / PT-UMC1 PT-UMC1B / PT-UMC1 PT-UMC1B / PT-UMC1 PT-UMC1B / PT-UMC1

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

9,500~18,000~19,800 9,700~24,000~26,700 14,000~36,000~42,000 17,100~42,000~47,100

Cooling Power Input

(kW)

1.26 1.91 2.97 4.07

EER (OD 95°F)

15 12.6 13.5 10.3

SEER

20.0 17.0 19.0 17.0

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

9,300~20,000~22,000 10,900~27,000~30,000 14,500~40,000~45,000 17,100~47,000~52,600

Heating Power Input

(kW)

1.5 2.60 3.20 4.05

COP (OD 47°F)

- - - -

HSPF

10.1 9.7 9.5 8.6

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 DB)

65-86

Heating (°F WB)

61-86

Unit Data

Refrigerant Type

R410A

Refrigerant Control

EEV

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

38 / 36 / 34 46 / 44 / 43

Outdoor Unit Sound Pressure Level ±3 dB(A)

(Cool/Heat)

48 / 52 52 / 54

Indoor Unit Net / Shipping Weight (lbs.)

46 / 55 55 / 65

Outdoor Unit Net / Shipping Weight (lbs.)

133 / 148 203 / 227

Grille Net / Shipping Weight (lbs.)

11 / 20

Power Wiring / Communications Cable (No. x AWG)

4 x 18

Compressor (Type x Qty.)

Twin Rotary x 1

Dehumidification Rate (pts./hr.)

5.1 7.7

Fan

Indoor Unit Type x Qty.

Turbo x 1

Outdoor Unit Type x Qty.

Propeller x 1 Propeller x 2

Motor / Drive

Brushless Digitally Controller / Direct

Airflow Rate

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

565/494/424 600/530/459 1,060/989/918 1,060/989/918

Outdoor Unit (CFM)

2,048 2,048 1,942 x 2 1,942 x 2

Piping

Liquid (in.)

3/8

Vapor (in.)

5/8

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

1-1/4 / 1

Additional Refrigerant Charge (oz./ft.)

0.43

Maximum Pipe Length (ft.)

164 246

Piping Length

(no additional refrigerant, ft.)

Maximum Elevation Difference (ft.)

Table 3: Four-Way Ceiling Cassette System General Data, continued.

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

difference 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

operation.

Piping lengths are equivalent.

FOUR-WAY CASSETTE | 13

Product Data

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

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

3/4 LUU097HV

60 208 - 230 187 - 253

11.9

9.0

0.25

1 LUU127HV 12.3

1-1/2 LUU187HV

18.1 30 13.5 0.6

2 LUU247HV

3 LUU367HV

24.5 40 18.0 2 0.6 x 2

3-1/2 LUU427HV

Voltage tolerance is ±10%.

Maximum allowable voltage unbalance is 2%.

RLA = Rated Load Amps.

MCA = Minimum Circuit Ampacity.

Maximum Overcurrent Protection (MOP) is calculated as 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

ELECTRICAL DATA

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

14 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

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]

Figure 2: LUU097HV, LUU127HV Outdoor Unit Dimensions.

FOUR-WAY CASSETTE | 15

Product Data

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

OUTDOOR UNIT DIMENSIONS

LUU187HV, LUU247HV

Figure 3: LUU187HV, LUU247HV Outdoor Unit Dimensions.

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

16 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

OUTDOOR UNIT DIMENSIONS

LUU367HV, LUU427HV

Figure 4: LUU367HV, LUU427HV Outdoor Unit Dimensions.

FOUR-WAY CASSETTE | 17

Product Data

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

INDOOR UNIT DIMENSIONS

LCN097HV4, LCN127HV4

Figure 5: LCN097HV4, LCN127HV4 Indoor Unit Dimensions.

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

18 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Figure 6: LCN187HV, LCN247HV Indoor Unit Dimensions.

INDOOR UNIT DIMENSIONS

JobName/Location:

Tag#:

Date:

PONo.:

CeilingCassetteSingleZone

Page3of3DFS‐SB‐AC‐006‐US013E23

Forcontinualproductdevelopment,LGreservestherighttochangespecificati onswithoutnotice.

©LGElectronicsU.S.A.,Inc.,EnglewoodCliffs,NJ.Allrig htsreserved.“LGLife’sGood”isaregisteredtrademarkofLGCo rp./www.lghvac.com

IndoorUnit 

(

IDU

)

‐LCN187HV

LCN187HV, LCN247HV

FOUR-WAY CASSETTE | 19

Product Data

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

Figure 7: LCN367HV, LCN427HV Indoor Unit Dimensions.

INDOOR UNIT DIMENSIONS

JobName/Location:

Tag#:

Date:

PONo.:

CeilingCassetteSingleZone

Page3of3DFS‐SB‐AC‐007‐US013E23

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

©LGElectronicsU.S.A.,Inc.,Englewo odCliffs,NJ.Allrightsreserved.“LGLife’sGood ”isaregisteredtrademarkofLGCorp./www.lghvac.com

IndoorUnit 

(

IDU

)

‐LCN367HV

LCN367HV, LCN427HV

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

20 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

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 (acous-

tic 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.

Table 5: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure Levels (dB[A]).

Model

Sound Pressure Levels (dB[A])

Cooling Heating

LUU097HV 47 51

LUU127HV 49 52

LUU187HV 48 52

LUU247HV 48 52

LUU367HV 52 54

LUU427HV 52 54

Figure 8: Four-Way Ceiling Cassette Outdoor Unit

Sound Pressure Level Measurement Location.

3.3 ft.

4.9 ft.

Figure 9: Four-Way Ceiling Cassette 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

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

FOUR-WAY CASSETTE | 21

Product Data

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

4.9 ft.

Ceiling

Microphone

Figure 10: Indoor Unit Sound Pressure Level

Measurement Location.

• 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.

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

LCN187HV, LCN247H

VLCN367HV, LCN427HV

Figure 11: Four-Way Ceiling Cassette Indoor Unit

Sound Pressure Level Diagrams.

Table 6: Four-Way Ceiling Cassette Indoor Unit Sound Pressure Levels (dB[A]).

Model

Sound Pressure Levels (dB[A])

H M L

LCN097HV4 36 33 30

LCN127HV4 38 35 32

LCN187HV 38 36 34

LCN247HV 38 36 34

LCN367HV 46 44 43

LCN427HV 46 44 43

ACOUSTIC DATA

Indoor Units

63 125 250 500 1000 2000 4000 8000

Octave Band Center Frequency (Hz)

NC-15

NC-70

NC-65

NC-60

NC-55

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

Sound Pressure Level (dB re 20uPa)

LCN097HV4

Octave band center frequency (Hz)

Sound pressure level (0 dB = 20 µPa)

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

LCN127HV4

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

LCN187HV, LCN247HVL

CN367HV, LCN427HV

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

22 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

AIR VELOCITY AND TEMPERATURE DISTRIBUTION

Figure 12: LCN097HV4 Air Velocity and Temperature Distribution Charts.

Figure 13: LCN127HV4 Air Velocity and Temperature Distribution Charts.

Cooling Heating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

9ft

7ft

3ft

0ft

5ft5ft8ft8ft0ft

9ft

7ft

3ft

0ft

ft8f

ft0ft

9ft

7ft

3ft

5ft5ft8ft8ft0ft

0ft

9ft

7ft

3ft

ft8f

ft0ft

6.66.6

4.94.9

3.33.3

1.61.6

6464

6868

7272

7575

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

6.66.6

4.94.9

3.33.3

1.61.6

9191

8686

8181

7575

7070

Cooling Heating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

9ft

7ft

3ft

0ft

5ft5ft8ft8ft0ft

9ft

7ft

3ft

0ft

t5ft8ft8ft0ft

9ft

7ft

3ft

5ft5ft8ft8ft0ft

0ft

9ft

7ft

3ft

t5ft8ft8ft0ft

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

6.6

4.6

3.3

1.6

9191

6.6

4.6

3.3

1.6

FOUR-WAY CASSETTE | 23

Product Data

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

Figure 14: LCN187HV Air Velocity and Temperature Distribution Charts.

Figure 15: LCN247HV Air Velocity and Temperature Distribution Charts.

Cooling Heating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

9ft

7ft

3ft

0ft

13ft10ft10ft13ft7ft7ft3ft3ft 0ft

9ft

7ft

3ft

13ft10ft10ft13ft7ft7ft3ft3ft 0ft

9ft

7ft

3ft

0ft

13ft10ft10ft13ft7ft7ft3ft3ft 0ft

9ft

7ft

3ft

0ft

13ft10ft10ft13ft7ft7ft 3ft3ft0ft

6.6

4.6

3.3

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

6.6 6.6

3.3

1.6

6464

CoolingHeating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

9ft

7ft

3ft

0ft

13ft10ft10ft13ft7ft7ft 3ft3ft0ft

9ft

7ft

3ft

13ft10ft10ft13ft7ft7ft 3ft3ft0ft

9ft

7ft

3ft

0ft

13ft10ft10ft13ft 7ft7ft3ft3ft 0ft

9ft

7ft

3ft

0ft

13ft10ft10ft13ft 7ft7ft3ft3ft0ft

6.6

4.6

3.3

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

6.6 6.6

3.3

1.6

6464

AIR VELOCITY AND TEMPERATURE DISTRIBUTION

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

24 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Figure 16: LCN367HV Air Velocity and Temperature Distribution Charts.

Figure 17: LCN427HV Air Velocity and Temperature Distribution Charts.

AIR VELOCITY AND TEMPERATURE DISTRIBUTION

Cooling Heating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

13.1

9.8

6.6

3.3

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

10.5ft

0ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

13.113.1

9.8

6.6

3.3

Cooling Heating

Discharge angle: 40°

Air velocity [ft/s]

Temperature [°F]

13.1

9.8

6.6

3.3

Discharge angle: 50°

Air velocity [ft/s]

Temperature [°F]

10.5ft

0ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft 7ft13ft

10.5ft

13ft 16ft10ft16ft 7ft3ft3ft0ft

7ft

3ft

10ft7ft13ft

13.113.1

9.8

6.6

3.3

FOUR-WAY CASSETTE | 25

Product Data

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

LUU097, 127HV

OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM

Figure 18: LUU097, 127HV Refrigerant Flow Diagram.

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 7: LUU097-127HV Four-Way Ceiling Concealed Outdoor Unit Thermistor Details.

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

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

26 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

INDOOR UNIT REFRIGERANT FLOW DIAGRAM

LCN097, 127HV4

Figure 19: LCN097, 127HV4 Refrigerant Flow Diagram.

Table 8: Four-Way Ceiling Cassette Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No. Vapor (inch) Liquid (inch)

LCN097HV4, LCN127HV4 3/8 1/4

Table 9: Four-Way Ceiling Cassette Indoor Unit Thermistor Details.

Description (Based on Cooling Mode) PCB Connector

Indoor Air Temperature Thermistor CN-ROOM

Evaporator Inlet Temperature Thermistor CN-PIPE / IN

Evaporator Outlet Temperature Thermistor CN-PIPE / OUT

Heat exchanger

Gas pipe connection port

(flare connection)

Liquid pipe connection port

(flare connection)

Turbo fan

Cooling

Heating

Indoor Air

Temperature Thermistor

Evaporator Inlet

Temperature Thermistor

Evaporator Outlet

Temperature Thermistor

FOUR-WAY CASSETTE | 27

Product Data

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

LUU187, 247, 367, 427HV

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 10: LUU197~427 Four-Way Ceiling Concealed Outdoor Unit Thermistor Details.

OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM

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 20: LUU187, 247, 367, 427HV Refrigerant Flow Diagram.

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

28 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

INDOOR UNIT REFRIGERANT FLOW DIAGRAM

Table 11: LCN187~427HV Four-Way Ceiling Cassette Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No. Vapor (inch) Liquid (inch)

LCN187HV, LC247HV,

LCN367HV, LC427HV

5/8 3/8

Table 12: LCN187~427HV Four-Way Ceiling Cassette Indoor Unit Thermistor Details.

Description (Based on Cooling Mode) PCB Connector

Indoor Air Temperature Thermistor CN-ROOM

Evaporator Inlet Temperature Thermistor CN-PIPE / IN

Evaporator Outlet Temperature Thermistor CN-PIPE / OUT

Heat exchanger

Gas pipe connection port

(flare connection)

Liquid pipe connection port

(flare connection)

Turbo fan

Cooling

Heating

Indoor Air

Temperature Thermistor

Evaporator Inlet

Temperature Thermistor

Evaporator Outlet

Temperature Thermistor

Figure 21: LCN187, 247, 367, 427HV Refrigerant Flow Diagram.

LCN187, 247, 367, 427HV

FOUR-WAY CASSETTE | 29

Product Data

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

OUTDOOR UNIT WIRING DIAGRAM

LUU097HV and LUU127HV

Figure 22: Four-Way Ceiling Cassette LUU097HV and LUU127HV Outdoor Unit Wiring Diagram.

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

30 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

OUTDOOR UNIT WIRING DIAGRAM

Figure 23: Four-Way Ceiling Cassette LUU187HV and LUU247HV Outdoor Unit Wiring Diagram.

LUU187HV and LUU247HV

FOUR-WAY CASSETTE | 31

Product Data

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

OUTDOOR UNIT WIRING DIAGRAM

LUU367HV and LUU427HV

Figure 24: Four-Way Ceiling Cassette LUU367HV and LUU427HV Outdoor Unit Wiring Diagram.

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

32 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

LCN097,127HV4

INDOOR UNIT WIRING DIAGRAM

Figure 25: Four-Way Ceiling Cassette LCN097, 127HV4 Indoor Unit Wiring Diagram.

FOUR-WAY CASSETTE | 33

Product Data

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

LCN187, 247, 367, 427HV

INDOOR UNIT WIRING DIAGRAM

Figure 26: Four-Way Ceiling Cassette LCN187, 247, 367, 427 HV Indoor Unit Wiring Diagram.

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

34 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

ACCESSORIES

Functions, Controls, and Options

Table 13: Indoor Units—Functions, Controls and Options.

Indoor Unit Type Four-Way Ceiling-Cassette

Airow

Air supply outlets

Airflow direction control (up & down)

Auto

Auto swing (up and down)

√

Airflow steps (fan/cool/heat)

4 / 5 / 4

Chaos wind (auto wind)

√

Jet cool/heat

√ / -

Swirl wind

√

Plasma air purifier

√

Washable anti-fungal

√

Operation

Drain pump

√

E.S.P. control

High ceiling operation

Auto Elevation Grille

Hot Start

√

Self diagnostics

√

Soft Dry (dehumidification)

√

Auto changeover

√

Auto operation

√

Auto restart

√

Child lock

√

Forced operation

√

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

(PZCWRCG3) for every additional indoor unit

Sleep mode

√

Timer (on/off)

√

Weekly schedule

√

Two thermistor control

√

Controllers

7-Day programmable controller

Simple wired remote controller

Wireless LCD remote control

√

Dry contact

Dry contact (temperature setting)

Central control (LGAP)

Primary washable filters.

Requires wired zone controller.

√ = Standard feature

o = Unit option

Table 14: Four-Way Ceiling-Cassette Indoor Unit Accessories Overview.

Model No. Description

ZLABGP01A Low Ambient Wind Baffle for for 9 and 12k Capacities

PT-QCHW0

Ceiling Grilles for 9 and 12k Capacities

PT-UQC

PT-UMC1B

Ceiling Grilles for 18 ~ 42k Capacities

PT-UMC1

PTVK410+PTVK420

Ventilation Kit + Flange for All Capacities

(Must comply with applicable codes for fire isolation dampers.)

PTVK430 Flange for All Capacities

PTEGM0 Auto Elevation Kit for All Capacities

FOUR-WAY CASSETTE | 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 comput-

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

without 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 27: MV Diagnostic Screen

ACCESSORIES

LGMV Diagnostic Software

“Cooling Capacity Data” on page 37

“Heating Capacity Data” on page 43

PERFORMANCE DATA

FOUR-WAY CASSETTE | 37

Product Data

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

PERFORMANCE DATA

Cooling Capacity Tables

Table 15: LC097HV4 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

LC097HV4 /

9,000

-4 8.85 6.84 0.39 9.40 7.23 0.40 9.95 7.00 0.42 10.34 7.15 0.42 11.05 7.21 0.43 11.60 7.34 0.44

0 8.84 6.88 0.39 9.39 7.27 0.41 9.94 7.04 0.42 10.34 7.19 0.43 11.04 7.25 0.44 11.59 7.39 0.45

5 8.84 6.94 0.40 9.38 7.33 0.42 9.93 7.10 0.43 10.33 7.25 0.44 11.03 7.31 0.44 11.58 7.45 0.45

10 8.83 7.00 0.41 9.38 7.39 0.42 9.93 7.16 0.44 10.32 7.31 0.44 11.02 7.37 0.45 11.57 7.51 0.46

15 8.82 7.05 0.41 9.37 7.45 0.43 9.92 7.21 0.44 10.31 7.37 0.45 11.01 7.43 0.46 11.56 7.57 0.47

20 8.82 7.11 0.42 9.36 7.51 0.43 9.91 7.27 0.45 10.31 7.42 0.46 11.01 7.49 0.46 11.55 7.63 0.47

25 8.81 7.16 0.42 9.36 7.57 0.44 9.90 7.33 0.46 10.30 7.48 0.46 11.00 7.54 0.47 11.54 7.69 0.48

30 8.80 7.22 0.43 9.35 7.63 0.45 9.90 7.38 0.46 10.29 7.54 0.47 10.99 7.60 0.48 11.54 7.75 0.49

35 8.80 7.27 0.44 9.34 7.68 0.45 9.89 7.44 0.47 10.28 7.60 0.47 10.98 7.66 0.48 11.53 7.81 0.49

40 8.79 7.33 0.44 9.33 7.74 0.46 9.88 7.50 0.48 10.27 7.65 0.48 10.97 7.72 0.49 11.52 7.86 0.50

45 8.78 7.38 0.45 9.33 7.80 0.47 9.87 7.55 0.48 10.27 7.71 0.49 10.96 7.78 0.50 11.51 7.92 0.51

50 8.78 7.44 0.45 9.32 7.86 0.47 9.87 7.61 0.49 10.26 7.77 0.49 10.96 7.83 0.50 11.50 7.98 0.51

55 8.77 7.49 0.46 9.31 7.91 0.48 9.86 7.66 0.49 10.25 7.82 0.50 10.95 7.89 0.51 11.49 8.04 0.52

60 8.76 7.55 0.47 9.31 7.97 0.48 9.85 7.72 0.50 10.24 7.88 0.51 10.94 7.95 0.52 11.48 8.10 0.53

65 8.76 7.60 0.47 9.30 8.03 0.49 9.84 7.77 0.51 10.24 7.94 0.51 10.93 8.00 0.52 11.47 8.16 0.53

70 8.75 7.65 0.48 9.29 8.09 0.50 9.84 7.83 0.51 10.23 7.99 0.52 10.92 8.06 0.53 11.47 8.21 0.54

75 8.54 7.53 0.50 9.08 7.96 0.52 9.62 7.72 0.54 10.01 7.89 0.55 10.71 7.96 0.56 11.25 8.12 0.57

80 8.33 7.40 0.53 8.87 7.84 0.55 9.41 7.61 0.57 9.80 7.78 0.58 10.49 7.86 0.59 11.03 8.03 0.60

85 8.12 7.27 0.56 8.66 7.71 0.58 9.20 7.49 0.60 9.59 7.66 0.60 10.28 7.76 0.62 10.82 7.92 0.63

90 7.91 7.13 0.58 8.45

7.57 0.60 8.99 7.37 0.62 9.37 7.55 0.63 10.06 7.65 0.64 10.60 7.82 0.66

95 7.68 7.05 0.61 8.22 7.50 0.63 8.75 7.31 0.65 9.00 7.38 0.66 9.83 7.61 0.67 10.36 7.79 0.69

100 7.50 6.86 0.63 8.03 7.31 0.66 8.57 7.14 0.68 8.88 7.27 0.69 9.64 7.44 0.70 10.17 7.63 0.72

105 7.31 6.68 0.66 7.84 7.13 0.68 8.38 6.96 0.71 8.77 7.15 0.72 9.45 7.28 0.73 9.99 7.47 0.74

110 7.12 6.45 0.68 7.66 6.89 0.71 8.19 6.75 0.74 8.58 6.94 0.74 9.26 7.07 0.76 9.80 7.26 0.77

115 6.94 6.25 0.71 7.47 6.70 0.74 8.01 6.57 0.76 8.39 6.76 0.77 9.08 6.90 0.79 9.61 7.10 0.80

118 6.82 6.21 0.73 7.36 6.66 0.75 7.89 6.54 0.78 8.28 6.73 0.79 8.96 6.88 0.80 9.50 7.08 0.82

122 6.79 6.19 0.75 7.32 6.65 0.77 7.86 6.52 0.80 8.24 6.72 0.81 8.93 6.87 0.83 9.46 7.07 0.84

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 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Cooling Capacity Tables

PERFORMANCE DATA

Table 16: LC127HV4 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

LC127HV4 /

12,000

-4 10.91 7.83 0.52 11.59 8.27 0.54 12.27 8.00 0.56 12.76 8.17 0.57 13.62 8.24 0.58 14.30 8.40 0.59

0 10.91 7.87 0.53 11.58 8.32 0.55 12.26 8.05 0.57 12.75 8.22 0.57 13.62 8.29 0.58 14.29 8.45 0.59

5 10.90 7.94 0.53 11.57 8.38 0.55 12.25 8.12 0.57 12.74 8.29 0.58 13.61 8.36 0.59 14.28 8.52 0.60

10 10.89 8.00 0.54 11.57 8.45 0.56 12.24 8.18 0.58 12.73 8.35 0.59 13.59 8.42 0.60 14.27 8.58 0.61

15 10.88 8.06 0.55 11.56 8.52 0.57 12.23 8.25 0.59 12.72 8.42 0.60 13.58 8.49 0.61 14.26 8.65 0.62

20 10.87 8.13 0.56 11.55 8.58 0.58 12.22 8.31 0.60 12.71 8.49 0.61 13.57 8.56 0.62 14.25 8.72 0.63

25 10.86 8.19 0.57 11.54 8.65 0.59 12.21 8.38 0.61 12.70 8.55 0.62 13.56 8.62 0.63 14.24 8.79 0.64

30 10.86 8.25 0.57 11.53 8.72 0.60 12.20 8.44 0.62 12.69 8.62 0.62 13.55 8.69 0.64 14.23 8.85 0.65

35 10.85 8.31 0.58 11.52 8.78 0.60 12.20 8.50 0.63 12.68 8.68 0.63 13.54 8.76 0.64 14.22 8.92 0.66

40 10.84 8.38 0.59 11.51 8.85 0.61 12.19 8.57 0.63 12.67 8.75 0.64 13.53 8.82 0.65 14.21 8.99 0.67

45 10.83 8.44 0.60 11.50 8.91 0.62 12.18 8.63 0.64 12.66 8.81 0.65 13.52 8.89 0.66 14.19 9.06 0.68

50 10.82 8.50 0.61 11.50 8.98 0.63 12.17 8.70 0.65 12.65 8.88 0.66 13.51 8.95 0.67 14.18 9.12 0.68

55 10.81 8.56 0.61 11.49 9.05 0.64 12.16 8.76 0.66 12.64 8.94 0.67 13.50 9.02 0.68 14.17 9.19 0.69

60 10.81 8.63 0.62 11.48 9.11 0.64 12.15 8.82 0.67 12.63 9.01 0.68 13.49 9.08 0.69 14.16 9.26 0.70

65 10.80 8.69 0.63 11.47 9.18 0.65 12.14 8.89 0.68 12.62 9.07 0.68 13.48 9.15 0.70 14.15 9.32 0.71

70 10.79 8.75 0.64 11.46 9.24 0.66 12.13 8.95 0.69 12.61 9.14 0.69 13.47 9.22 0.71 14.14 9.39 0.72

75 10.53 8.61 0.67 11.20 9.10 0.70 11.87 8.82 0.72 12.35 9.02 0.73 13.20 9.10 0.74 13.87 9.28 0.76

80 10.27 8.46 0.71 10.94 8.96 0.73 11.60 8.70 0.76 12.09 8.89 0.77 12.94 8.99 0.78 13.60 9.17 0.80

85 10.01 8.30 0.74 10.68 8.81 0.77 11.34 8.56 0.80 11.82 8.76 0.81 12.67 8.87 0.82 13.34 9.06 0.84

90 9.76 8.15 0.78 10.42

8.65 0.80 11.08 8.42 0.83 11.56 8.63 0.84 12.41 8.74 0.86 13.07 8.94 0.88

95 9.48 8.06 0.81 10.14 8.58 0.84 10.80 8.36 0.87 11.10 8.44 0.88 12.12 8.70 0.90 12.78 8.90 0.91

100 9.25 7.85 0.84 9.91 8.36 0.87 10.57 8.16 0.91 10.96 8.31 0.92 11.89 8.51 0.93 12.55 8.72 0.95

105 9.02 7.63 0.88 9.68 8.14 0.91 10.34 7.96 0.94 10.81 8.18 0.95 11.66 8.32 0.97 12.32 8.54 0.99

110 8.78 7.37 0.91 9.44 7.88 0.95 10.10 7.71 0.98 10.58 7.93 0.99 11.43 8.09 1.01 12.09 8.30 1.03

115 8.55 7.15 0.95 9.21 7.66 0.98 9.87 7.51 1.02 10.35 7.73 1.03 11.19 7.89 1.05 11.85 8.11 1.07

118 8.42 7.10 0.97 9.08 7.61 1.00 9.74 7.47 1.04 10.21 7.69 1.05 11.06 7.87 1.07 11.72 8.09 1.09

122 8.37 7.08 1.00 9.03 7.60 1.03 9.69 7.46 1.07 10.17 7.68 1.08 11.01 7.86 1.10 11.67 8.08 1.12

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.

FOUR-WAY CASSETTE | 39

Product Data

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

PERFORMANCE DATA

Cooling Capacity Tables

Table 17: LC187HV 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

LC187HV /

18,000

5 17.83 14.43 0.50 18.94 15.24 0.68 20.04 15.69 0.74 20.84 15.07 0.75 22.26 15.19 0.75 23.37 15.48 0.75

10 17.80 14.53 0.52 18.91 15.35 0.70 20.02 15.80 0.76 20.81 15.18 0.77 22.23 15.30 0.77 23.33 15.59 0.77

15 17.78 14.64 0.53 18.88 15.46 0.72 19.99 15.92 0.78 20.78 15.29 0.79 22.20 15.42 0.79 23.30 15.71 0.79

20 17.75 14.74 0.54 18.86 15.57 0.74 19.96 16.03 0.80 20.75 15.40 0.81 22.16 15.53 0.81 23.27 15.82 0.81

25 17.73 14.85 0.56 18.83 15.68 0.76 19.93 16.14 0.82 20.72 15.50 0.83 22.13 15.63 0.83 23.23 15.93 0.83

30 17.70 14.95 0.57 18.80 15.79 0.78 19.90 16.26 0.84 20.69 15.61 0.85 22.10 15.74 0.85 23.20 16.04 0.85

35 17.68 15.05 0.59 18.77 15.90 0.80 19.87 16.37 0.86 20.66 15.72 0.87 22.07 15.85 0.88 23.17 16.15 0.87

40 17.65 15.16 0.60 18.75 16.01 0.81 19.84 16.48 0.88 20.63 15.83 0.90 22.04 15.96 0.90 23.13 16.26 0.89

45 17.63 15.26 0.61 18.72 16.12 0.83 19.81 16.59 0.90 20.60 15.94 0.92 22.00 16.07 0.92 23.10 16.37 0.92

50 17.60 15.36 0.63 18.69 16.23 0.85 19.79 16.70 0.92 20.57 16.04 0.94 21.97 16.18 0.94 23.06 16.48 0.94

55 17.57 15.46 0.64 18.67 16.33 0.87 19.76 16.81 0.94 20.55 16.15 0.96 21.94 16.28 0.96 23.03 16.59 0.96

60 17.55 15.56 0.66 18.64 16.44 0.89 19.73 16.92 0.96 20.52 16.25 0.98 21.91 16.39 0.98 23.00 16.70 0.98

65 17.52 15.66 0.67 18.61 16.55 0.91 19.70 17.03 0.98 20.49 16.36 1.00 21.88 16.50 1.00 22.96 16.81 1.00

70 17.50 15.77 0.69 18.58 16.65 0.93 19.67 17.14 1.01 20.46 16.47 1.02 21.84 16.60 1.02 22.93 16.92 1.02

75 17.08 15.51 0.73 18.16 16.40 0.96 19.24 16.90 1.03 20.03 16.25 1.05 21.41 16.40 1.06 22.50 16.73 1.07

80 16.66 15.24 0.77 17.74 16.14 0.99 18.82 16.66 1.06 19.60 16.02 1.08 20.98 16.20 1.10 22.06 16.53 1.11

85 16.24 14.96 0.88 17.32 15.87 1.07 18.40 16.40 1.14 19.17 15.78 1.16 20.55 15.98 1.18 21.63 16.32 1.20

90 15.82 14.68 0.99 16.90 15.59 1.16 17.97 16.13 1.21 18.75 15.54 1.23 20.12 15.75 1.26 21.20 16.11 1.28

95 15.37 14.53 1.09 16.44 15.45 1.24 17.51 16.01 1.28 18.00 15.20 1.26 19.65 15.67 1.32 20.72 16.04 1.35

100 14.99 14.14 1.14 16.06

15.06 1.26 17.13 15.63 1.29 17.77 14.96 1.28 19.28 15.33 1.32 20.35 15.71 1.35

105 14.62 13.75 1.20 15.69 14.68 1.28 16.76 15.25 1.30 17.53 14.73 1.30 18.90 15.00 1.32 19.97 15.38 1.35

110 14.24 13.28 1.16 15.32 14.20 1.21 16.39 14.77 1.21 17.16 14.29 1.21 18.53 14.57 1.22 19.60 14.96 1.24

115 13.87 12.88 1.05 14.94 13.80 1.06 16.01 14.38 1.03 16.79 13.93 1.02 18.15 14.22 1.02 19.22 14.62 1.04

118 13.10 12.28 0.93 14.13 13.17 0.91 15.16 13.74 0.87 15.90 13.31 0.85 17.21 13.61 0.85 18.24 14.00 0.87

122 12.84 12.07 0.89 13.86 12.95 0.86 14.87 13.52 0.82 15.60 13.10 0.80 16.90 13.40 0.79 17.91 13.79 0.81

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.

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

40 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

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

LC247HV /

24,000

5 23.77 17.54 0.76 25.25 18.53 1.03 26.73 19.07 1.12 27.79 18.32 1.13 29.68 18.47 1.14 31.15 18.82 1.13

10 23.74 17.67 0.78 25.21 18.66 1.06 26.69 19.21 1.15 27.75 18.45 1.17 29.64 18.61 1.17 31.11 18.96 1.17

15 23.70 17.80 0.80 25.18 18.80 1.09 26.65 19.35 1.18 27.71 18.58 1.20 29.59 18.74 1.20 31.07 19.10 1.20

20 23.67 17.92 0.83 25.14 18.93 1.12 26.61 19.49 1.21 27.67 18.72 1.23 29.55 18.88 1.23 31.02 19.23 1.23

25 23.64 18.05 0.85 25.10 19.07 1.15 26.57 19.63 1.24 27.63 18.85 1.26 29.51 19.01 1.26 30.98 19.37 1.26

30 23.60 18.17 0.87 25.07 19.20 1.18 26.53 19.76 1.27 27.59 18.98 1.29 29.47 19.14 1.30 30.93 19.50 1.29

35 23.57 18.30 0.89 25.03 19.33 1.21 26.50 19.90 1.31 27.55 19.11 1.33 29.42 19.27 1.33 30.89 19.64 1.32

40 23.53 18.43 0.91 25.00 19.46 1.23 26.46 20.04 1.34 27.51 19.24 1.36 29.38 19.41 1.36 30.84 19.77 1.36

45 23.50 18.55 0.93 24.96 19.60 1.26 26.42 20.17 1.37 27.47 19.37 1.39 29.34 19.54 1.39 30.80 19.91 1.39

50 23.47 18.67 0.95 24.92 19.73 1.29 26.38 20.31 1.40 27.43 19.50 1.42 29.30 19.67 1.42 30.75 20.04 1.42

55 23.43 18.80 0.97 24.89 19.86 1.32 26.34 20.44 1.43 27.39 19.63 1.45 29.25 19.80 1.45 30.71 20.17 1.45

60 23.40 18.92 1.00 24.85 19.99 1.35 26.30 20.58 1.46 27.35 19.76 1.48 29.21 19.93 1.49 30.66 20.31 1.48

65 23.36 19.05 1.02 24.81 20.12 1.38 26.27 20.71 1.49 27.31 19.89 1.52 29.17 20.06 1.52 30.62 20.44 1.52

70 23.33 19.17 1.04 24.78 20.25 1.41 26.23 20.84 1.52 27.27 20.02 1.55 29.13 20.19 1.55 30.57 20.57 1.55

75 22.77 18.85 1.11 24.21 19.94 1.45 25.66 20.55 1.57 26.70 19.75 1.59 28.55 19.94 1.61 29.99 20.34 1.62

80 22.21 18.53 1.17 23.65 19.63 1.50 25.09 20.25 1.61 26.13 19.48 1.64 27.97 19.69 1.66 29.42 20.10 1.68

85 21.65 18.19 1.33 23.09 19.30 1.63 24.53 19.93 1.72 25.57 19.19 1.75 27.40 19.43 1.78 28.84 19.84 1.81

90 21.09 17.85 1.49 22.53 18.96 1.76 23.96 19.61 1.84 25.00 18.90 1.87 26.83 19.15 1.91 28.27 19.59 1.94

95 20.49 17.66 1.65 21.92 18.79 1.87 23.35 19.46 1.94 24.00 18.48 1.91 26.20 19.05 2.00 27.63 19.50 2.04

100 19.99 17.19 1.73 21.42

18.31 1.91 22.85 19.00 1.96 23.69 18.19 1.94 25.70 18.64 2.00 27.13 19.10 2.04

105 19.49 16.71 1.82 20.92 17.84 1.95 22.35 18.54 1.97 23.38 17.91 1.97 25.20 18.23 2.00 26.63 18.70 2.04

110 18.99 16.14 1.76 20.42 17.26 1.84 21.85 17.96 1.83 22.88 17.37 1.83 24.70 17.71 1.85 26.13 18.19 1.89

115 18.49 15.66 1.58 19.92 16.78 1.60 21.35 17.49 1.56 22.38 16.93 1.54 24.20 17.29 1.55 25.63 17.77 1.58

118 17.47 14.93 1.40 18.84 16.01 1.38 20.21 16.70 1.32 21.20 16.18 1.29 22.95 16.54 1.29 24.32 17.02 1.32

122 17.12 14.68 1.34 18.48 15.75 1.31 19.83 16.44 1.24 20.80 15.93 1.21 22.53 16.29 1.20 23.88 16.76 1.23

Table 18: LC247HV 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.

Cooling Capacity Tables

PERFORMANCE DATA

FOUR-WAY CASSETTE | 41

Product Data

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

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

LC367HV /

36,000

5 35.66 25.73 1.18 37.87 27.18 1.60 40.09 27.98 1.74 41.69 26.87 1.76 44.52 27.10 1.77 46.73 27.61 1.76

10 35.61 25.92 1.22 37.82 27.38 1.65 40.03 28.18 1.79 41.63 27.07 1.81 44.45 27.30 1.82 46.67 27.81 1.81

15 35.56 26.11 1.25 37.77 27.58 1.69 39.97 28.39 1.83 41.57 27.26 1.86 44.39 27.49 1.87 46.60 28.01 1.86

20 35.51 26.29 1.28 37.71 27.77 1.74 39.92 28.59 1.88 41.51 27.46 1.91 44.33 27.69 1.92 46.53 28.21 1.91

25 35.45 26.48 1.32 37.66 27.97 1.78 39.86 28.79 1.93 41.45 27.65 1.96 44.26 27.89 1.97 46.46 28.41 1.96

30 35.40 26.66 1.35 37.60 28.17 1.83 39.80 28.99 1.98 41.39 27.85 2.01 44.20 28.08 2.01 46.40 28.61 2.01

35 35.35 26.85 1.38 37.55 28.36 1.87 39.74 29.19 2.03 41.33 28.04 2.06 44.13 28.27 2.06 46.33 28.81 2.06

40 35.30 27.03 1.42 37.49 28.55 1.92 39.69 29.39 2.08 41.27 28.23 2.11 44.07 28.47 2.11 46.26 29.01 2.11

45 35.25 27.21 1.45 37.44 28.75 1.96 39.63 29.59 2.13 41.21 28.42 2.16 44.01 28.66 2.16 46.20 29.20 2.16

50 35.20 27.40 1.48 37.39 28.94 2.01 39.57 29.79 2.18 41.15 28.61 2.21 43.94 28.85 2.21 46.13 29.40 2.21

55 35.15 27.58 1.52 37.33 29.13 2.05 39.51 29.99 2.22 41.09 28.80 2.26 43.88 29.04 2.26 46.06 29.59 2.26

60 35.10 27.76 1.55 37.28 29.32 2.10 39.46 30.18 2.27 41.03 28.99 2.31 43.82 29.24 2.31 46.00 29.79 2.31

65 35.05 27.94 1.58 37.22 29.51 2.14 39.40 30.38 2.32 40.97 29.18 2.36 43.75 29.43 2.36 45.93 29.98 2.36

70 34.99 28.12 1.61 37.17 29.70 2.19 39.34 30.58 2.37 40.91 29.37 2.41 43.69 29.61 2.41 45.86 30.18 2.41

75 34.15 27.66 1.72 36.32 29.25 2.26 38.49 30.15 2.43 40.05 28.98 2.48 42.82 29.26 2.50 44.99 29.83 2.51

80 33.31 27.18 1.82 35.47 28.79 2.33 37.64 29.71 2.50 39.20 28.58 2.55 41.96 28.89 2.59 44.12 29.48 2.62

85 32.48 26.69 2.07 34.63 28.31 2.53 36.79 29.24 2.68 38.35 28.15 2.73 41.10 28.50 2.77 43.26 29.11 2.82

90 31.64 26.18 2.32 33.79 27.81 2.73 35.94 28.77 2.86 37.50 27.72 2.91 40.25 28.10 2.96 42.40 28.73 3.02

95 30.74 25.91 2.57 32.88 27.56 2.91 35.02 28.55 3.02 36.00 27.11 2.97 39.30 27.95 3.11 41.44 28.61 3.18

100 29.99 25.21 2.70 32.13

26.87 2.97 34.27 27.87 3.04 35.53 26.69 3.02 38.55 27.35 3.11 40.69 28.02 3.18

105 29.24 24.52 2.82 31.38 26.17 3.03 33.52 27.19 3.06 35.07 26.27 3.07 37.80 26.75 3.11 39.94 27.43 3.18

110 28.49 23.68 2.74 30.63 25.33 2.86 32.77 26.35 2.85 34.32 25.49 2.84 37.05 25.99 2.87 39.20 26.68 2.93

115 27.74 22.97 2.46 29.88 24.61 2.49 32.02 25.65 2.43 33.57 24.84 2.40 36.31 25.36 2.40 38.45 26.07 2.46

118 26.20 21.90 2.18 28.26 23.49 2.15 30.31 24.50 2.05 31.80 23.74 2.01 34.42 24.27 2.00 36.48 24.96 2.05

122 25.69 21.53 2.09 27.71 23.10 2.04 29.74 24.11 1.93 31.21 23.37 1.88 33.80 23.90 1.87 35.82 24.59 1.92

Table 19: LC367HV 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.

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

42 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Cooling Capacity Tables

PERFORMANCE DATA

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

LC427HV /

42,000

5 41.60 30.30 1.62 44.19 32.00 2.20 46.77 32.94 2.38 48.64 31.64 2.42 51.94 31.91 2.42 54.52 32.51 2.42

10 41.54 30.52 1.67 44.12 32.24 2.26 46.70 33.18 2.45 48.57 31.87 2.49 51.86 32.14 2.49 54.44 32.75 2.48

15 41.48 30.74 1.71 44.06 32.47 2.32 46.64 33.42 2.51 48.50 32.10 2.55 51.79 32.37 2.56 54.36 32.98 2.55

20 41.42 30.96 1.76 44.00 32.70 2.38 46.57 33.66 2.58 48.43 32.33 2.62 51.71 32.60 2.63 54.29 33.22 2.62

25 41.36 31.18 1.80 43.93 32.93 2.45 46.50 33.90 2.65 48.36 32.56 2.69 51.64 32.83 2.69 54.21 33.45 2.69

30 41.30 31.39 1.85 43.87 33.16 2.51 46.43 34.14 2.71 48.29 32.79 2.76 51.57 33.06 2.76 54.13 33.69 2.75

35 41.24 31.61 1.89 43.81 33.39 2.57 46.37 34.37 2.78 48.22 33.01 2.82 51.49 33.29 2.83 54.05 33.92 2.82

40 41.18 31.83 1.94 43.74 33.62 2.63 46.30 34.61 2.85 48.15 33.24 2.89 51.42 33.52 2.90 53.97 34.15 2.89

45 41.13 32.04 1.99 43.68 33.85 2.69 46.23 34.84 2.91 48.08 33.46 2.96 51.34 33.75 2.96 53.90 34.38 2.96

50 41.07 32.26 2.03 43.62 34.07 2.75 46.17 35.08 2.98 48.01 33.69 3.03 51.27 33.97 3.03 53.82 34.62 3.03

55 41.01 32.47 2.08 43.55 34.30 2.82 46.10 35.31 3.05 47.94 33.91 3.10 51.19 34.20 3.10 53.74 34.85 3.09

60 40.95 32.68 2.12 43.49 34.53 2.88 46.03 35.54 3.11 47.87 34.13 3.16 51.12 34.42 3.17 53.66 35.07 3.16

65 40.89 32.90 2.17 43.43 34.75 2.94 45.97 35.77 3.18 47.80 34.36 3.23 51.04 34.65 3.24 53.58 35.30 3.23

70 40.83 33.11 2.21 43.36 34.97 3.00 45.90 36.00 3.25 47.73 34.58 3.30 50.97 34.87 3.30 53.50 35.53 3.30

75 39.84 32.56 2.36 42.37 34.44 3.10 44.90 35.50 3.34 46.73 34.12 3.39 49.96 34.45 3.42 52.49 35.13 3.44

80 38.86 32.01 2.50 41.39 33.90 3.19 43.91 34.98 3.42 45.73 33.65 3.49 48.95 34.01 3.54 51.48 34.72 3.59

85 37.89 31.42 2.84 40.41 33.33 3.47 42.92 34.43 3.67 44.74 33.15 3.74 47.96 33.55 3.80 50.47 34.28 3.86

90 36.91 30.83 3.18 39.43 32.75 3.74 41.94 33.88 3.92 43.75 32.64 3.98 46.96 33.08 4.06 49.47 33.83 4.14

95 35.86 30.51 3.52 38.36 32.45 3.99 40.85 33.62 4.14 42.00 31.92 4.07 45.85 32.91 4.27 48.35 33.68 4.35

100 34.98 29.69 3.69 37.48

31.63 4.07 39.98 32.81 4.17 41.46 31.43 4.14 44.98 32.20 4.27 47.47 32.99 4.35

105 34.11 28.87 3.87 36.61 30.82 4.15 39.11 32.02 4.19 40.91 30.93 4.21 44.10 31.49 4.26 46.60 32.30 4.36

110 33.24 27.88 3.76 35.74 29.82 3.92 38.23 31.03 3.91 40.04 30.01 3.89 43.23 30.60 3.93 45.73 31.41 4.02

115 32.37 27.05 3.38 34.86 28.98 3.41 37.36 30.20 3.33 39.17 29.24 3.29 42.36 29.87 3.30 44.86 30.70 3.37

118 30.57 25.78 2.99 32.97 27.65 2.94 35.36 28.85 2.81 37.10 27.95 2.75 40.16 28.57 2.74 42.56 29.39 2.81

122 29.97 25.35 2.86 32.33 27.20 2.79 34.70 28.39 2.64 36.41 27.51 2.57 39.43 28.14 2.56 41.79 28.95 2.63

Table 20: LC427HV 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.

FOUR-WAY CASSETTE | 43

Product Data

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

PERFORMANCE DATA

Heating Capacity Tables

Table 21: LC097HV4 System Heating Capacity Table.

Table 22: LC127HV 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

LC097HV4 / 9,000

-4 -4.4 4.38 0.61 4.06 0.63 4.03 0.64 3.99 0.64 3.95 0.65 3.77 0.67

0 -0.4 5.22 0.62 4.91 0.64 4.84 0.65 4.77 0.65 4.71 0.66 4.51 0.68

5 4.5 6.22 0.63 5.93 0.65 5.79 0.66 5.70 0.67 5.62 0.68 5.39 0.70

10 9 6.89 0.63 6.61 0.66 6.43 0.67 6.32 0.68 6.23 0.69 5.98 0.71

17 15 7.63 0.65 7.36 0.67 7.13 0.69 7.00 0.70 6.90 0.71 6.63 0.73

20 19 8.07 0.66 7.82 0.68 7.55 0.70 7.41 0.71 7.30 0.72 7.02 0.74

25 23 8.82 0.67 8.56 0.69 8.26 0.72 8.10 0.73 7.98 0.74 7.68 0.76

30 28 9.57 0.69 9.28 0.71 8.96 0.73 8.79 0.75 8.66 0.76 8.34 0.78

35 32 10.33 0.71 10.00 0.73 9.66 0.75 9.48 0.77 9.35 0.78 9.01 0.80

40 36 10.85 0.73 10.55 0.75 10.21 0.78 10.04 0.79 9.89 0.81 9.54 0.83

45 41 11.51 0.75 11.24 0.78 10.91 0.80 10.72 0.82 10.58 0.83 10.20 0.86

47 43 11.77 0.77 11.51 0.79 11.18 0.82 11.00 0.83 10.85 0.84 10.46 0.87

50 46 11.81 0.76 11.57 0.78 11.28 0.81 11.12 0.82 10.99 0.83 10.62 0.85

55 51 11.87 0.75 11.67 0.77 11.45 0.79 11.32 0.80 11.22 0.81 10.89 0.82

60 56 11.92 0.74 11.77 0.76 11.62 0.77 11.53 0.78 11.45 0.78 11.15 0.80

63 59 11.96 0.74 11.83 0.75 11.73 0.76 11.65 0.77 11.58 0.77 11.31 0.78

68 64 11.99 0.73 11.89 0.74 11.83 0.75 11.77 0.75 11.72 0.76 11.48 0.76

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

LC127HV4 / 12,000

-4 -4.4 6.04 0.83 5.61 0.86 5.56 0.87 5.50 0.88 5.44 0.88 5.20 0.92

0 -0.4 7.04 0.85 6.63 0.88 6.52 0.89 6.43 0.90 6.36 0.91 6.09 0.94

5 4.5 8.24 0.87 7.85 0.90 7.66 0.92 7.54 0.93 7.44 0.93 7.14 0.97

10 9 9.03 0.88 8.67 0.91 8.43 0.94 8.28 0.95 8.17 0.96 7.85 0.99

17 15 9.91 0.91 9.57 0.94 9.27 0.96 9.10 0.98 8.97 0.99 8.62 1.02

20 19 10.45 0.92 10.11 0.95 9.78 0.98 9.60 1.00 9.45 1.02 9.09 1.04

25 23 11.34 0.95 11.00 0.98 10.62 1.01 10.42 1.04 10.26 1.05 9.87 1.08

30 28 12.24 0.98 11.86 1.02 11.46 1.05 11.25 1.07 11.08 1.09 10.67 1.12

35 32 13.14 1.02 12.73 1.05 12.29 1.08 12.07 1.10 11.89 1.12 11.46 1.15

40 36 13.81 1.05 13.43 1.08 13.00 1.11 12.77 1.14 12.59 1.15 12.14 1.18

45 41 14.65 1.08 14.30 1.12 13.88 1.15 13.65 1.17 13.46 1.19 12.98 1.23

47 43 14.99 1.10 14.65 1.13 14.23 1.17 14.00 1.19 13.81 1.21 13.31 1.24

50 46 15.03 1.09 14.73 1.12 14.36 1.16 14.15 1.17 13.99 1.19 13.52 1.22

55 51 15.10 1.08 14.85 1.11 14.58 1.13 14.41 1.14 14.28 1.15 13.85 1.18

60 56 15.18 1.07 14.98 1.09 14.80 1.11 14.67 1.12 14.57 1.12 14.19 1.14

63 59 15.22 1.06 15.05 1.08 14.92 1.09 14.82 1.10 14.74 1.10 14.40 1.12

68 64 15.26 1.05 15.13 1.07 15.06 1.08 14.98 1.08 14.92 1.08 14.61 1.09

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).

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

44 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette 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

LC187HV / 18,000

0 -0.4 8.96 1.12 8.42 1.16 8.43 1.18 8.24 1.19 8.08 1.20 7.74 1.24

5 4.5 10.89 1.14 10.37 1.18 10.23 1.20 10.01 1.22 9.84 1.23 9.44 1.27

10 9 12.18 1.15 11.69 1.19 11.43 1.22 11.20 1.24 11.01 1.25 10.58 1.29

17 15 13.60 1.17 13.13 1.21 12.75 1.25 12.50 1.27 12.30 1.29 11.83 1.32

20 19 14.46 1.19 14.00 1.22 13.55 1.27 13.29 1.29 13.08 1.31 12.59 1.35

25 23 15.90 1.22 15.43 1.25 14.89 1.30 14.61 1.32 14.38 1.35 13.84 1.38

30 28 17.34 1.25 16.80 1.29 16.22 1.33 15.93 1.36 15.69 1.38 15.11 1.42

35 32 18.78 1.28 18.18 1.33 17.56 1.36 17.24 1.39 16.99 1.42 16.38 1.45

40 36 19.73 1.32 19.18 1.36 18.57 1.40 18.25 1.43 17.99 1.45 17.34 1.49

45 41 20.93 1.36 20.43 1.41 19.83 1.45 19.50 1.48 19.24 1.50 18.54 1.55

47 43 21.41 1.38 20.93 1.43 20.33 1.47 20.00 1.50 19.73 1.52 19.02 1.57

50 46 21.47 1.37 21.04 1.42 20.52 1.46 20.22 1.48 19.98 1.50 19.31 1.54

55 51 21.58 1.36 21.22 1.39 20.83 1.43 20.59 1.44 20.40 1.46 19.79 1.49

60 56 21.68 1.35 21.40 1.37 21.14 1.40 20.95 1.41 20.81 1.42 20.28 1.44

63 59 21.74 1.34 21.51 1.36 21.32 1.38 21.18 1.39 21.06 1.39 20.57 1.41

68 64 21.81 1.33 21.62 1.34 21.51 1.36 21.40 1.36 21.31 1.37 20.86 1.38

Table 23: LC187HV System Heating Capacity Table.

Table 24: LC247HV 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

LC247HV / 24,000

0 -0.4 15.86 1.74 14.97 1.81 14.92 1.83 14.59 1.85 14.32 1.86 13.72 1.93

5 4.5 17.72 1.80 16.91 1.86 16.65 1.90 16.30 1.92 16.01 1.94 15.37 2.00

10 9 18.97 1.85 18.21 1.91 17.80 1.96 17.44 1.98 17.15 2.01 16.48 2.07

17 15 20.35 1.91 19.64 1.97 19.07 2.04 18.70 2.07 18.40 2.10 17.69 2.16

20 19 21.18 1.96 20.50 2.02 19.84 2.09 19.46 2.13 19.16 2.16 18.43 2.22

25 23 22.57 2.04 21.90 2.10 21.14 2.18 20.74 2.22 20.42 2.26 19.65 2.32

30 28 23.96 2.13 23.22 2.20 22.42 2.27 22.01 2.32 21.68 2.36 20.88 2.42

35 32 25.35 2.22 24.54 2.30 23.71 2.36 23.28 2.41 22.94 2.46 22.11 2.52

40 36 26.64 2.28 25.89 2.36 25.07 2.43 24.63 2.48 24.29 2.52 23.41 2.59

45 41 28.26 2.37 27.58 2.44 26.77 2.52 26.32 2.57 25.97 2.60 25.02 2.68

47 43 28.90 2.40 28.26 2.48 27.45 2.56 27.00 2.60 26.64 2.64 25.67 2.71

50 46 28.99 2.38 28.40 2.45 27.70 2.52 27.30 2.56 26.98 2.59 26.07 2.66

55 51 29.13 2.36 28.65 2.42 28.12 2.47 27.79 2.50 27.54 2.52 26.72 2.58

60 56 29.27 2.33 28.89 2.38 28.53 2.42 28.29 2.44 28.09 2.45 27.38 2.49

63 59 29.35 2.32 29.03 2.35 28.78 2.39 28.59 2.40 28.43 2.41 27.77 2.44

68 64 29.44 2.30 29.18 2.33 29.04 2.36 28.89 2.36 28.77 2.37 28.17 2.39

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).

PERFORMANCE DATA

Heating Capacity Tables

FOUR-WAY CASSETTE | 45

Product Data

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

Table 25: LC367HV 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

LC367HV / 36,000

0 -0.4 19.98 2.41 18.81 2.50 18.80 2.54 18.37 2.56 18.03 2.58 17.27 2.67

5 4.5 23.43 2.44 22.34 2.53 22.01 2.58 21.54 2.61 21.17 2.63 20.32 2.72

10 9 25.75 2.47 24.71 2.56 24.16 2.62 23.67 2.66 23.27 2.69 22.36 2.77

17 15 28.29 2.51 27.31 2.60 26.52 2.68 26.00 2.72 25.58 2.76 24.60 2.84

20 19 29.83 2.54 28.88 2.62 27.95 2.71 27.41 2.76 26.99 2.80 25.96 2.88

25 23 32.40 2.60 31.44 2.67 30.35 2.77 29.77 2.83 29.31 2.88 28.21 2.95

30 28 34.98 2.67 33.90 2.75 32.73 2.84 32.13 2.90 31.65 2.95 30.49 3.02

35 32 37.55 2.73 36.36 2.83 35.12 2.90 34.49 2.97 33.98 3.02 32.76 3.10

40 36 39.47 2.81 38.36 2.91 37.14 2.99 36.49 3.05 35.98 3.10 34.68 3.19

45 41 41.86 2.91 40.86 3.01 39.66 3.10 39.00 3.16 38.47 3.20 37.07 3.30

47 43 42.82 2.95 41.86 3.05 40.66 3.15 40.00 3.20 39.47 3.24 38.03 3.34

50 46 42.94 2.93 42.08 3.02 41.04 3.11 40.44 3.15 39.97 3.19 38.62 3.28

55 51 43.15 2.90 42.44 2.97 41.65 3.04 41.18 3.08 40.79 3.11 39.59 3.17

60 56 43.36 2.87 42.80 2.93 42.27 2.98 41.91 3.00 41.62 3.02 40.56 3.07

63 59 43.49 2.85 43.01 2.90 42.64 2.94 42.35 2.96 42.12 2.97 41.14 3.00

68 64 43.61 2.83 43.23 2.87 43.02 2.90 42.80 2.91 42.62 2.92 41.73 2.94

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).

Table 26: LC427HV System Heating Capacity Table.

Model No. /

Nominal Capacity

(Btu/h)

Outdoor Air Temp. Indoor Air Temp. °F DB

°F DB °F WB

61 64 68 70 72 75

TC PI TC PI TC PI TC PI TC PI TC PI

LC427HV / 42,000

0 -0.4 21.92 2.60 20.62 2.70 20.64 2.74 20.17 2.76 19.79 2.78 18.95 2.88

5 4.5 26.29 2.70 25.06 2.79 24.69 2.85 24.17 2.88 23.75 2.91 22.79 3.01

10 9 29.21 2.79 28.03 2.89 27.41 2.96 26.85 3.00 26.40 3.03 25.36 3.13

17 15 32.42 2.91 31.30 3.01 30.40 3.10 29.80 3.15 29.32 3.19 28.20 3.28

20 19 34.37 2.99 33.28 3.09 32.21 3.19 31.59 3.25 31.09 3.30 29.91 3.39

25 23 37.62 3.14 36.50 3.23 35.23 3.35 34.57 3.42 34.03 3.47 32.75 3.57

30 28 40.87 3.30 39.61 3.41 38.25 3.51 37.55 3.59 36.98 3.65 35.63 3.74

35 32 44.13 3.46 42.72 3.58 41.27 3.67 40.53 3.76 39.93 3.83 38.49 3.92

40 36 46.38 3.56 45.07 3.68 43.64 3.79 42.88 3.86 42.28 3.93 40.74 4.03

45 41 49.19 3.68 48.01 3.81 46.60 3.93 45.82 4.00 45.20 4.05 43.56 4.17

47 43 50.31 3.73 49.19 3.86 47.78 3.98 47.00 4.05 46.38 4.10 44.69 4.23

50 46 50.46 3.71 49.44 3.82 48.22 3.93 47.52 3.99 46.96 4.04 45.37 4.15

55 51 50.70 3.67 49.86 3.76 48.94 3.85 48.38 3.90 47.93 3.93 46.51 4.01

60 56 50.95 3.63 50.29 3.70 49.67 3.77 49.24 3.80 48.90 3.82 47.65 3.88

63 59 51.10 3.61 50.54 3.67 50.10 3.72 49.76 3.74 49.49 3.76 48.34 3.80

68 64 51.25 3.59 50.80 3.63 50.54 3.67 50.29 3.68 50.08 3.69 49.03 3.72

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).

PERFORMANCE DATA

Heating Capacity Tables

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

46 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

“Equipment Selection Procedure” on page 48

“Building Ventilation Design Guide” on page 50

“Placement Considerations” on page 55

APPLICATION

GUIDELINES

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48 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

EQUIPMENT SELECTION PROCEDURE

Equivalent Piping Length for Piping Components

Table 27: 9,000 and 12,000 Btu/h Capacity Cassette 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

Cooling / Heating Correction Factors

For Four-Way Ceiling Cassette 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 28: 18,000 to 42,000 Btu/h Capacity Cassette System Cooling and Heating Capacity Coefcient Factors.

Table 29: Equivalent Piping Length for Elbows.

Altitude Correction Factor

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

tude correction factors must be applied.

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 (%)

LC097HV4 (9,000 Btu/h) 100 99.7 99.2 98.7 - - - - - -

LC127HV4 (12,000 Btu/h) 100 99.7 99.2 98.7 - - - - - -

Heating Capacity Coefficient Factor

Rate of Capacity

Change (%)

LC097HV4 (9,000 Btu/h) 100 99.7 99.2 98.7 - - - - - -

LC127HV4 (12,000 Btu/h) 100 99.7 99.2 98.7 - - - - - -

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 (%)

LC187HV (18,000 Btu/h) 100 99.3 97.9 96.6 93.8 91.1 88.4 - - -

LC247HV (24,000 Btu/h) 100 99.3 97.9 96.6 93.8 91.1 88.4 - - -

LC367HV (36,000 Btu/h) 100 99.3 97.9 96.6 93.8 91.1 88.4 85.6 82.9 81.5

LC427HV (42,000 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 (%)

LC187HV (18,000 Btu/h) 100 99.7 99.2 98.7 97.7 96.6 95.6 - - -

LC247HV (24,000 Btu/h) 100 99.7 99.2 98.7 97.7 96.6 95.6 - - -

LC367HV (36,000 Btu/h) 100 99.7 99.2 98.7 97.7 96.6 95.6 94.6 93.5 93.0

LC427HV (42,000 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.

FOUR-WAY CASSETTE | 49

Application Guidelines

EQUIPMENT SELECTION PROCEDURE

Table 30: Outdoor Unit Frost Accumulation Factor (Heating)

There will be a 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 30).

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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50 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette 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. 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 express, implied, or statutory and

the implied warranties of merchantability and tness for a particular purpose are excluded should the building ventilation methods fail 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 28: 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.

FOUR-WAY CASSETTE | 51

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 while outdoor air louvers/hoods are opened.

• 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 29: 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.

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52 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette 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 30: 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.

FOUR-WAY CASSETTE | 53

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 31: 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.

54 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette 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 32: 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.

FOUR-WAY CASSETTE | 55

Application Guidelines

PLACEMENT CONSIDERATIONS

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.

• Place the unit in a location where condensation drainage can be conveniently routed away.

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

• Place the unit in a location where electrical noise / electromagnetic waves will not affect 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.

• Place in 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).

Installing in a High or Dropped Ceiling

High or dropped ceilings, often found in commercial buildings and offices, may cause a wide temperature differentiation. To countermeasure:

• Change the indoor unit mode selection to allow for higher ceilings (see table).

• Install an air circulator.

• Set the air discharge outlet so that heated air flows in a downward direction.

• Use a dual door system to protect the building gate or exit.

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.

Ceiling Height Mode Selection

≤7-1/2 feet Low Ceiling

7-1/2 feet to 8-7/8 feet Standard

8-7/8 feet to 10-3/16 feet High Ceiling

10-3/16 feet to 11-13/16 feet Very High Ceiling

Table 31: Indoor Unit High Ceiling Mode Selection Options

(LCN097HV4, LCN127HV4, LCN187HV, LCN247HV).

Ceiling Height Mode Selection

≤8-7/8 feet Low Ceiling

8-7/8 feet to 10-1/2 feet Standard

10-1/2 feet to 11-13/16 feet High Ceiling

11-13/16 feet to 13-13/16 feet Very High Ceiling

Table 32: Indoor Unit High Ceiling Mode Selection Options (LCN367,

LCN427HV ).

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.

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56 | FOUR-WAY CASSETTE

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Indoor Unit

PLACEMENT CONSIDERATIONS

Ceiling

Ceiling Tile

Floor

≥13/32

≥11-13/16 inches

H = 6 feet to 12 feet

≥39-3/8 inches

≥19-11/16

≤11-13/16 inches

inches

Figure 33: Indoor Unit Clearance Requirements.

23-1/16 inches ~ 26 inches (Ceiling Opening)

20-3/8 inches

18-5/32 inches

20-3/8 inches

23-1/16 inches ~ 26 inches (Ceiling Opening)

20-19/32 inches

22-15/32 inches

Unit Size

22-15/32 inches

Unit Size

12-9/16 inches

Figure 34: Ceiling Opening Dimensions and Bolt Locations.

Installing the 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-sup-

plied 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.

1/50~

1/100

<27-1/2 inches (9k, 12k)

<31-1/2 inches (18k to 42k)

Figure 35: Indoor Unit Drain Piping.

Installing in an Area with High Humidity Levels

If the environment is prone to humidity levels of 80% or more (near the ocean, lakes, etc.) or where steam could 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.

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.

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

FOUR-WAY CASSETTE | 57

Application Guidelines

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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58 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Outdoor Unit

PLACEMENT CONSIDERATIONS

Tie-Downs / Wind Restraints and Lightening Protection

The strength of the Four-Way Ceiling Cassette 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 con-

figuration 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 36: Lightening Protection Diagram.

Table 33: 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 37: Bracket Mounting.

• All referenced materials are to be field-supplied.

• Images are not to scale.

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FOUR-WAY CASSETTE | 59

Application Guidelines

Bolt and

nti-vibration

Pad Placement

Refrigerant Piping

Connection Location

Foundation

Top of Outdoor Unit

(Looking Down)

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: Bolting the LUU097HV and LUU127HV Outdoor Units to the

Platform (Appearance May Vary).

Minimum

7-7/8 inches

Minimum 24-13/32 inches

Minimum 15-3/4 inches

Figure 39: Bolting the LUU187HV and LUU247HV Outdoor Unit to the

Platform.

Outdoor Unit Bolt Type Concrete Height Bolt Depth

LUU097HV,

LUU127HV

M10-J

Minimum 3-15/16

inches

Minimum 2-3/8 inches

LUU187HV,

LUU247HV

M10-J

Minimum 7-7/8

inches

LUU367HV

LUU427HV

M10-J

Table 34: Outdoor Unit Foundation Specications.

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

Figure 40: Bolting the LUU367HV and LUU427HV Outdoor Unit to the

Platform.

Figure 41: Platform Mounting.

Minimum

3-15/16

inches

Minimum 22-3/16 inches

Minimum 14-19/32 inches

Figure 42: Close up of Bolt Attachment.

Minimum

7-7/8

Minimum

15-3/4

Minimum 24-13/32

Unit: Inch

M10

Anchor Bolt

2-3/8 ~ 4-3/32

25/32

Unit: Inch

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60 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

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 43 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 43 for minimum

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

Figure 43: 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 35: 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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FOUR-WAY CASSETTE | 61

Application Guidelines

PLACEMENT CONSIDERATIONS

Outdoor Unit

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

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 and 42,000 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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62 | FOUR-WAY CASSETTE

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PLACEMENT CONSIDERATIONS

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 36: 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

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

Outdoor Unit

REFRIGERANT PIPING

DESIGN & LAYOUT

BEST PRACTICES

“Refrigerant Piping Design” on page 64

"Selecting Field-Supplied Copper Tubing" on page 65

"Refrigerant Piping System Layout" on page 66

"Electrical Connections" on page 73

REFRIGERANT PIPING DESIGN

Design Guideline Summary

Device Connection Limitations

A single-zone four-way ceiling cassette system consists of one outdoor unit and one indoor unit. One of the most critical elements of a

single-zone four-way ceiling cassette system is the refrigerant piping. The table below lists pipe length limits that must be followed in the

design of a single-zone four-way ceiling cassette refrigerant pipe system.

Table 37: Single-Zone Four-Way Ceiling Cassette Refrigerant Piping System Limitations.

System Model Name

LC097HV4, LC127HV4 LC187HV, LC247HV LC367HV, LC427HV

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 fittings and indoor or

outdoor units

≥20 inches ≥20 inches ≥20 inches

No additional refrigerant

24.6 feet 24.6 feet 24.6 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

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

164

Max Length = A

Max Elevation = B

164

Unit = Feet

Figure 44: Typical LC097HV4 and LC127HV4 System Layout. Figure 45: Typical LC187HV and LC247HV System Layout.

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Max Length = A

Max Elevation = B

Unit = Feet

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

246

Max Length = A

Max Elevation = B

246

Unit = Feet

Figure 46: Typical LC347HV and LC427HV System Layout.

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64 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

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

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

Figure 47: 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 38: 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.

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FOUR-WAY CASSETTE | 65

Refrigerant Piping Design and Best Practices

REFRIGERANT PIPING DESIGN

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

64.

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 40 for equivalent lengths.

Table 40: 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 48: 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.

Selecting Field-Supplied Copper Tubing / Refrigerant Piping System Layout

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.

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66 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

No Pipe Size Substitutions

Using a different size is prohibited and may result in a system malfunction or failure to work at all.

Refrigerant Piping System Layout

Pipe Supports

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

pipe insulation jacket (see Figure 50). 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 insulation). Place a second layer of in-

sulation 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: 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 51.

Figure 51: Typical Pipe Support Location—Change

in Pipe Direction.

Max. 12"

~ 12" – 19"

Figure 50: Pipe Hanger Details.

A + B ~ 12" – 19"

Figure 52: Pipe Support at Indoor Unit.

Figure 49: 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.

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

become oil traps that lead to equipment malfunction.

Concrete Beam

Insert

Suspension Bolt

Anti-vibration Material

Nail

INSTALLATION & LAYOUT BEST PRACTICES

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Refrigerant Piping Design and Best Practices

Refrigerant Piping System Layout

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 53: Pipe Sleeve Options.

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

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

Utility Conduit.

Table 41: 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 42: Outdoor Unit Refrigerant Pipe Connections.

System Model No. Liquid Conn. (inches) Vapor Conn. (inches)

LC097HV, LC127HV 1/4 3/8

LC187HV, LC247HV,

LC367HV, LC427HV

3/8 5/8

Vapor Line

Liquid Line

Min. 18 Gauge

Cable

Power/Communication

e Sleeve

Insulation Material

Insulation

Material

INSTALLATION & LAYOUT BEST PRACTICES

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68 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Piping can be installed

in one of four different

layouts.

Figure 55: Removing the Refrigerant Piping Connection Cover

(LUU097HV, LUU127HV).

Figure 56: Removing the Refrigerant Piping Connection Cover

(LUU187HV, LUU247HV).

Figure 57: LUU097HV, LUU127HV, LUU187HV, LUU247HV Refrigerant

Piping Connections.

Single Zone Cassette 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 70 for torque information.

Outdoor unit

Gas side piping

(Bigger diameter)

Liquid side piping

(Smaller diameter)

Torque wrench

Connection cover

Figure 58: LUU367HV, LUU427HV Refrigerant Piping Connections.

Tubing cover

When tightening the are nut with a torque wrench, ensure the direction

for tightening follows the arrow on the wrench.

Refrigerant Piping System Layout

INSTALLATION & LAYOUT BEST PRACTICES

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FOUR-WAY CASSETTE | 69

Refrigerant Piping Design and Best Practices

Refrigerant Piping System Layout

Brazing Practices

Pressure-reducing

Valve

Packless

Valve

Tape

Nitrogen

Pipe to

be brazed

Refrigerant

Piping

Figure 59: Refrigerant Pipe Brazing.

It is imperative to keep the piping system free of contaminants and debris such as 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 43 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

• 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.

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 43: Torque Wrench Tightening.

INSTALLATION & LAYOUT BEST PRACTICES

All joints are brazed in the field. Single Zone Cassette refrigeration system

components contain very small capillary tubes, small orifices, electronic expan-

sion 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.

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

70 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

Charging

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

evaporator as well as a standard 25 ft line. Any time a line set is

used longer then the standard 25 ft line set length, the refrigerant

charge has to be adjusted.

You must adjust the charge based on how many feet of piping are

added based on 0.22 oz. of R410A per foot. 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.

Table 44: Charging Capacity.

Refrigerant Piping System Layout

INSTALLATION & LAYOUT BEST PRACTICES

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.

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 LC097HV4,

12k LC127HV4

3/8 1/4 24.6 49 66 6.6 0.22

18k LC187HV,

24k LC247HV

5/8 3/8 24.6 98.4 164 6.6 0.43

36k LH367HV,

42k LH427HV

5/8 3/8 24.6 98.4 246 6.6 0.43

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

FOUR-WAY CASSETTE | 71

Refrigerant Piping Design and Best Practices

CONDENSATE DRAIN PIPING

Indoor Unit

Drain Pipe Dia. (inches)

(External / Internal)

Drain Pump Drain Lift Height (inches)

Amount of Drainage (gpm)

(at 0.4 inches high)

9k to 12k Ceiling Cassette 1-1/4 / 1 Standard 27-1/2 0.106

18k to 42 Ceiling Cassette 1-1/4 / 1 Standard 31-1/2 0.106

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 57 to 62 for information in reference to outdoor unit placement and condensate drainage.

Indoor Units

The Four-Way Ceiling Cassette indoor units include a factory-installed drain pump. Depending on the location of the indoor unit, condensa-

tion can be drained directly to the outside of the building, or tied into a drainage piping system.

Table 45: Drain Piping Specications.

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 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

ELECTRICAL CONNECTIONS

LUU367HV, LUU427HV Outdoor Unit Connections

1. Remove the side panel.

2. Use the clamp to attach the wiring / cable.

LUU097HV, LUU127HV, LUU187HV, LUU247HV Outdoor

Unit Connections

1. Remove the 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 fasten-

ing screws.

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: LUU187, 247HV Outdoor Unit Terminal Block 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

Figure 65: LUU367, 427HV Outdoor Unit Terminal Block Location.

Terminal Block

Connecting

Cable

Power

Supply

Cord

Conduit Panel

Tubing Cover

Over 0.2”

Outdoor Unit Power Wiring / Communications Cable Connections

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

FOUR-WAY CASSETTE | 73

Electrical Connections and Mechanical Specs

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

Cassette Indoor Unit Power Wiring / Communications Cable Connections

Lock Nut

Conduit

Mounting

Plate

Conduit

Wiring / Cable Connections

Power Wiring

Wired

Controller

Cable

Control Box Cover

Control Box

Cover Screws

1. To access the terminal block, open the control box cover.

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. Neatly arrange power wiring / communications cable and secure with the appropriate

cable restraint. Do not apply force to the wiring connections when clamping.

5. Firmly reattach the control box cover. Do not catch the wiring in the electric box

cover. Make sure the cover firmly closes.

6. Fill in any gaps around the wiring access holes with sealant to prevent foreign parti-

cles from entering the indoor unit.

Figure 67: Power Wiring and Communications

Cable Connection Access.

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: Cassette Indoor Unit Terminal

Block Location / Using a Conduit.

ELECTRICAL CONNECTIONS

• 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.

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

74 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

ELECTRICAL CONNECTIONS

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

Power

Wiring

Indoor Unit

• 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.

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

FOUR-WAY CASSETTE | 75

Electrical Connections and Mechanical Specs

TECHNICAL DATA

“Mechanical Specifications” on page 77

“Acronyms” on page 79

MECHANICAL SPECIFICATIONS

Four-Way Ceiling Cassette System

Figure 70: Four-Way Ceiling Cassette

System (LC187HV, LC247HV Models).

General

System

LG single zone four-way ceiling cassette system comprises of a sin-

gle frame outdoor unit connected to a single indoor unit with a single

refrigerant circuit. An LG single zone four-way ceiling cassette 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 main-

tained. LG components are manufactured in a facility registered to

ISO 9001 and ISO 14001, which is a set of standards applying to en-

vironmental protection set by the International organization for Stan-

dardization (ISO). The system components comply with Underwriters

Laboratories (UL) 1995 Heating and Cooling Equipment Standard

for Safety and bear the Electrical Testing Laboratories (ETL) label.

Wiring in these units are in accordance with the national Electrical

Code (NEC). LG single zone four-way ceiling cassette systems have

published performance ratings certified by AHRI (Air-Conditioning,

Heating, and Refrigeration Institute) and are listed in the AHRI Stan-

dard 210/240 certified product directory.

Outdoor Unit

The outdoor units have sound levels not exceeding 54 dB(A) tested

in an anechoic chamber under ISO Standard 3745.

Indoor Unit

The indoor units have sound ratings no higher than 46 dB(A) as

tested per ISO Standard 3745.

Temperature Ranges

9,000 and 12,000 Btu/h Ceiling Cassette Operating Ranges

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

ing (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.

18,000, 24,000, 36,000, and 42,000 Btu/h Ceiling Cassette

Operating Ranges

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

ing; 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 removable panel

to allow access to major

internal components, and

legs to secure the unit during

installation.

Indoor Unit

The indoor unit case is con-

structed of a galvanized steel

plate designed to recess in

the ceiling, and has a surface

mounted concentric grille on

the bottom of the unit. Unit

has four supply air outlets

and one return air inlet. The

supply air outlet has four-

directional slot diffusers, each

equipped with an independent

oscillating motorized guide vane to change airflow direction. A guide

vane algorithm sequentially changes the predominant discharge

airflow direction in counterclockwise pattern, or can be used to lock

each guide vane independently in a field-adjusted fixed position.

The four vanes can be individually adjusted from the wired remote

controller to customize the airflow pattern for the conditioned space.

A setting in the cooling and heating modes can cycle the vanes up

and down for uniform / random air distribution.

A required architectural grille is sold as a separate required acces-

sory. The four-way grille is off-white acrylonitrile butadiene styrene

(ABS) polymeric resin with a tapered trim edge.

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.

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

FOUR-WAY CASSETTE | 77

Electrical Connections and Mechanical Specs

MECHANICAL SPECIFICATIONS

Four-Way Ceiling Cassette System

Figure 71: Four-Way Ceiling Cassette

System (LC367HV, LC427HV Models).

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 min-

imum of two 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), 12,000 Btu/h (LUU127HV), 18,000

Btu/h (LUU187HV), 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 (LUU367HV) and 42,000

Btu/h (LUU427HV) include two fans. Fan blades are made of Acry-

lonitrile 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

All of the indoor units have a single, direct-drive, turbo fan manu-

factured of high-strength ABS HT-700 polymeric resin; the fans are

statically and dynamically balanced. The fan motor is brushless

digitally controlled (BLDC) with permanently lubricated and sealed

ball bearings. The fan / motor assembly is mounted on vibra-

tion-attenuating rubber grommets. Fan speed is controlled using a

microprocessor-based direct digital control algorithm that provides

pre-programmed, field-selectable fixed or auto fan speeds in the

Heating and Cooling modes.

The indoor fan has Low, Med, High, Power Cool and Auto settings

for Cooling mode; and has Low, Med, High, and Auto settings for

Heating mode. Auto setting adjusts the fan speed based on the

difference between the controller set-point and space temperature.

Air Filter -

Indoor Unit

Return air is filtered with a

factory-supplied, removable,

washable filter accessible

from the bottom of the unit.

Electrical

The system was designed to

operate using 208–230/60/1

power with voltage varianc-

es 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 compo-

nents, printed circuit boards, thermistors, sensors, terminal blocks,

and lugs for power wiring. Factory installed microprocessor controls

in the outdoor unit and indoor unit shall perform functions to efficient-

ly operate the single zone system, communicating via an 18 AWG

four stranded and shielded conductor power/transmission cable. Mi-

croprocessor-based algorithms provide component protection, soft-

start capability, refrigeration system pressure, temperature, defrost,

and ambient control. System can be operated through a handheld

wireless controller supplied with the four-way ceiling cassette indoor

unit.

Condensate Lift/Pump

The indoor unit is provided with a factory installed and wired conden-

sate lift/pump capable of providing a minimum 27-1/2 inch (9k and

12k indoor units) or minimum 31-1/2 inch (18k to 42k indoor units) 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.

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

78 | FOUR-WAY CASSETTE

Four-Way Ceiling Cassette System Engineering Manual

ACRONYMS

Table 46: 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

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

FOUR-WAY CASSETTE | 79

Electrical Connections and Mechanical Specs

EM_SZ_Cassette_7_16

Supersedes: DFS-EM-AC-001-US_014D02

20001747 ISO 9001: 2008

LG ELECTRONICS INC.

LG Electronics Commercial Products Support

1-888-865-3026 USA

Follow the prompts for commercial A/C products.

LG Electronics, U.S.A., Inc.

Commercial Air Conditioning Division

4300 North Point Parkway

Alpharetta, Georgia 30022

LG Electronics LC097HV4 Air Conditioner

Product's Documents

Single Zone Four Way Ceiling Cassette System Engineering Manual

Specifications

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