LG LC247HV Installation and operation manual
SINGLE-ZONE FOUR-WAY
CEILING-CASSETTE SYSTEM
ENGINEERING MANUAL
Single-Zone Four-Way
Ceiling Cassette
Heat Pump Systems
1.5 to 3.5 Tons
LC187HV (18,000 Btu/h)
LC247HV (24,000 Btu/h)
LC367HV (36,000 Btu/h)
LC427HV (42,000 Btu/h)
DFS-EM-AC-001-US 014D02
For continual product development, LG reserves the right to change specifications without notice.
©LG Electronics Inc.
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.
This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.
TABLE OF CONTENTS
About LG Electronics, Inc.............................................................................................................................................................................................. 4
Duct-Free Split (DFS) Systems...................................................................................................................................................................................... 4
Unit Nomenclature.......................................................................................................................................................................................................... 6
Four-Way Ceiling Cassette System Data................................................................................................................................................................. 7-38
Product Features and Benets..................................................................................................................................................................................... 8
General Data ................................................................................................................................................................................................................ 9
Electrical Data ............................................................................................................................................................................................................ 10
Dimensions............................................................................................................................................................................................................ 11-14
Acoustic Data ........................................................................................................................................................................................................ 15-16
Air Velocity and Temperature Distribution.............................................................................................................................................................. 17-18
Refrigerant Flow Diagrams.................................................................................................................................................................................... 19-20
Wiring Diagrams.................................................................................................................................................................................................... 21-23
Accessories ........................................................................................................................................................................................................... 24-28
Performance Data.................................................................................................................................................................................................... 29-36
Cooling Capacity Tables ........................................................................................................................................................................................ 29-33
Heating Capacity Tables ........................................................................................................................................................................................ 34-35
Application Guidelines............................................................................................................................................................................................ 37-52
Equipment Selection Procedure............................................................................................................................................................................ 38-39
Building Ventilation Design Guide ......................................................................................................................................................................... 40-44
Placement Considerations..................................................................................................................................................................................... 45-52
Refrigerant Piping Design & Layout Best Practices .......................................................................................................................................... 53-218
Design Guideline Summary........................................................................................................................................................................................ 54
Selecting Field-Supplied Copper Tubing ............................................................................................................................................................... 55-56
Refrigerant Piping System Layout......................................................................................................................................................................... 57-61
Piping Insulation .................................................................................................................................................................................................... 62-63
Condensate Drain Piping....................................................................................................................................................................................... 63-64
Electrical and Mechanical Specications ............................................................................................................................................................. 65-71
Wiring Connections ............................................................................................................................................................................................... 66-69
Mechanical Specications ..................................................................................................................................................................................... 70-71
Acronyms...................................................................................................................................................................................................................... 72
TABLE OF SYMBOLS
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injury.
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about the subject.
This symbol indicates a recommendation or tip. Recommendations instruct the user to apply the suggested
practice to ensure the best operating results in order to achieve the maximum benet of the product. Tips
contain practical information that may help the user solve a problem or describe actions that may save time.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp. INTRODUCTION | 3
Introduction
CONVERGENCE OF TECHNOLOGY,
INNOVATION, FLEXIBILITY, & STYLE
About LG Electronics, Inc.
LG Electronics, Inc. is a global leader and technology innovator
in consumer electronics, mobile communications, and home
appliances, employing more than 213,000 people in more than 60
countries worldwide. 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 estab-
lished 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.lghvac.com.
Duct-Free Split (DFS) Systems
LG HVAC systems offer a range of solutions that are cost efficient,
quiet and attractive. Duct-Free Split (DFS) 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 Technology
LG DFS air-source systems offer zoning without the need for zone
damper systems. The advanced controls of the four-way ceiling
cassette system provide exceptional temperature and air flow
control, and can rapidly adapt system operating parameters to the
ever changing building load. Single-zone DFS systems are easy to
design, install, and maintain. The modular design allows occupants
to control their environmental condition, providing individualized
control of the set-point temperature and allowing occupants to condi-
tion only the occupied zones.
Inverter variable-speed compressors are also measurably quieter
and consume less energy than those in conventional air condi-
tioners. The Inverter compressor ramps up or down to match the
required room capacity and maintain the comfort level. When the
selected temperature is reached, the inverter compressor operates
at low speed to maintain that comfort level, thereby using less
energy.
Quality Commitment
LG is committed to the success of DFS projects. We provide tech-
nical support during installation and commissioning. LG offers a
variety of classes designed for installers and servicer providers on
DFS installation. 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 specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
4|INTRODUCTION
Four-Way Ceiling Cassette System Engineering Manual
UNIT NOMENCLATURE
A090 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
LSV 2N
N: Indoor Unit
U: Outdoor Unit
No N or U: System
H = Heat Pump
Generation:
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp. INTRODUCTION | 5
Introduction
Convergence of Technological Innovation with Flexibility and Style
ARCHITECTURAL APPEAL
Four-Way Ceiling-Cassette DFS
Systems
A four-way ceiling-cassette DFS 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 systems are 208-230V/60Hz/1PH systems, available
in a nominal capacities of 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.
Inverter Technology
LG four-way ceiling cassette air-source systems offer zoning without
the need for zone damper systems. The advanced controls of the
four-way ceiling cassette system provide exceptional zone dehumid-
ification and temperature control, and can rapidly adapt system op-
erating parameters to the ever changing building load. Single-zone
four-way ceiling cassette systems are easy to design, install, and
maintain. The design allows occupants to control their environmental
condition, providing individualized control of the set-point tempera-
ture and allowing occupants to condition only the occupied zones.
Benefits of Four-Way Ceiling Cassette Systems
•Inverter technology
•Available in 18,000, 24,000, 36,000, 42,000 Btu/h capacities
•All-season use—heat pump models for both cooling and heat-
ing capabilities
•Operating ranges for outdoor units of 5°F (DB) to 118°F for
cooling; 0°F to 64°F (WB) for heating
•Operating ranges for indoor units of 64°F to 86°F for cooling;
60°F to 86°F for heating
•Quiet operation inside and outside
Inverter variable-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 DFS systems allow cooling or heating
for a single room without the need for extensive remodeling. Long
refrigerant 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 specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
6|INTRODUCTION
Four-Way Ceiling Cassette System Engineering Manual
“Product Features and Benefits” on page 8
“General Data” on page 9
“Electrical Data” on page 10
“Dimensions” on page 11
“Acoustic Data” on page 15
“Air Velocity and Temperature Distribution” on page 17
“Refrigerant Flow Diagrams” on page 19
“Wiring Diagrams” on page 21
“Accessories” on page 24
PRODUCT DATA
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
8|FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
PRODUCT FEATURES AND BENEFITS
Outdoor Unit Model (Btu/h) Indoor Unit Model (Btu/h) Controller
LUU187HV (18,000),
LUU247HV (24,000)
LUU367HV (36,000),
LUU427HV (42,000)
LCN187HV (18,000), LCN247HV (24,000),
LCN367HV (36,000), LCN427HV (42,000) PQWRHDF0
Four-Way Ceiling
Cassette Systems
Single zone four-way ceiling cassette sys-
tems are equipped with inverter components
that offer superior load matching and long
piping installation. The product works for
optimizing power consumption in residential
and small office buildings. Using a four-way
ceiling cassette indoor unit with custom tem-
perature controls allow for precise tempera-
ture 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 quietest sound levels in
the industry, operating as low as 48 dB(A).
To promote a quiet, comfortable environ-
ment, four-way ceiling cassette indoor units
operate as low as 34 dB(A). LG customers
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 condi-
tioning control systems, which use thermo-
static controls to maintain room tempera-
tures, LG inverters continuously vary the
indoor unit fan speed and refrigerant flow, in-
directly providing lower and more consistent
humidity levels in the conditioned space.
The longer the indoor coil temperature is be-
low 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 compres-
sors on and off multiple times per hour. The
outdoor unit responds by varying the com-
pressor speed and fan motors as needed
to maintain system operating pressure. As
a result, four-way ceiling cassette systems
delivers precise space temperature control.
Inverter Driven
The compressor is optimized to maximize
compressor efficiency, which reduces power
consumption and monthly utility bills. This
inverter technology allows the LG four-way
ceiling cassette outdoor unit to vary the com-
pressor motor shaft speed and deliver an
appropriate amount of cooling to the indoor
unit. Occupants 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 intercon-
necting 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 1.5, 2, 3, and 3.5 ton capacities.
Operating ranges for the outdoor units are
Cooling: 5°F DB to 118°F DB; Heating: 0°F
WB to 64°F WB.
Clean Finish
The four-way ceiling cassette indoor unit
case is recessed, while the off-white archi-
tectural 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 efficien-
cy 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
aluminum fins. This maintains heat transfer
properties of the coil for an extended time. A
hydrophilic coating is applied to the outdoor
unit coil fin surface over the GoldFin coating.
This coating enhances the development of
heavier water droplets gathering on the fin
surface. As a result, the droplets roll off the
fin surfaces, delaying the point when frost
forms on the coil surface during heating op-
eration. 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
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
FOUR-WAY CASSETTE | 9
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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-UMC1 PT-UMC1 PT-UMC1 PT-UMC1
Nominal Cooling Capacity (Btu/h) 18,000 24,000 36,000 42,000
Cooling Power Input1(kW) 1.26 1.91 2.97 4.07
Nominal Heating Capacity (Btu/h) 20,000 27,000 40,000 47,000
Heating Power Input1(kW) 1.50 2.60 3.20 4.05
Power Supply V, Ø, Hz2208-230 / 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 Type3R410A
Refrigerant Control EEV
Indoor Unit Sound Pressure Level ±3 dB(A) (H/M/L)438 / 36 / 34 46 / 44 / 43
Outdoor Unit Sound Pressure Level ±3 dB(A) (Cool/Heat)448 / 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)24 x 18
Power Supply (No. AWG) 3 x 12
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.) 25
Maximum Elevation Difference (ft.) 98
Table 2: Four-Way Ceiling Cassette System General Data.
EEV: Electronic Expansion Valve
IDU: Indoor Unit
ODU: outdoor Unit
Power wiring is field supplied and must comply with the applicable local and national codes.
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).
1Power Input is rated at high speed.
2All power/communication cables to be minimum 18 AWG, 4-conductor, stranded, shielded and must
comply with applicable and national code.
3Take 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.
4Sound 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.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
10 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
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
1.5 LUU187HV
60 208 - 230 187 - 253
18.1 30 1 13.5 1 0.6
2 LUU247HV
3 LUU367HV 24.5 40 1 18.0 2 0.6 x 2
3.5 LUU427HV
Voltage tolerance is ±10%.
Maximum allowable voltage unbalance is 2%.
RLA = Rated Load Amps.
MCA = Minimum Circuit Ampacity.
Maximum Overcurrent Protection (MOP) is calculated as follows:
(Largest motor FLA x 2.25) + (Sum of other motor FLA) rounded down
to the nearest standard fuse size.
Table 3: Electrical Data.
Electrical Data
ELECTRICAL DATA
FOUR-WAY CASSETTE | 11
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
OUTDOOR UNIT DIMENSIONS
LUU187HV, LUU247HV
JobName/Location:
Tag#:
Date:
PONo.:
SingleZoneHighStaticDuct
Page2of3DFS‐SB‐AM‐001‐US013E28
Forcontinualproductdevelopment,LGreservestherighttochangespecificationswithoutnotice.
©LGElectronicsU.S.A.,Inc.,EnglewoodCliffs,NJ.Allrightsreserved.“LGLife’sGood”isaregisteredtrademarkofLGCorp./www.lghvac.com
OutdoorUnit
(
ODU
)
‐LUU247HV
Figure 2: LUU187HV, LUU247HV Outdoor Unit Dimensions.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
12 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
OUTDOOR UNIT DIMENSIONS
LUU367HV, LUU427HV
JobName/Location:
Tag#:
Date:
PONo.:
SingleZoneHighStaticDuct
Page2of3DFS‐SB‐AM‐002‐US013E28
Forcontinualproductdevelopment,LGreservestherighttochangespecificationswithoutnotice.
©LGElectronicsU.S.A.,Inc.,EnglewoodCliffs,NJ.Allrightsreserved.“LGLife’sGood”isaregisteredtrademarkofLGCorp./www.lghvac.com
OutdoorUnit
(
ODU
)
‐LUU367HV
Figure 3: LUU367HV, LUU427HV Outdoor Unit Dimensions.
FOUR-WAY CASSETTE | 13
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Figure 4: LCN187HV, LCN247HV Indoor Unit Dimensions.
INDOOR UNIT DIMENSIONS
JobName/Location:
Tag#:
Date:
PONo.:
CeilingCassetteSingleZone
Page3of3DFS‐SB‐AC‐006‐US013E23
Forcontinualproductdevelopment,LGreservestherighttochangespecificationswithoutnotice.
©LGElectronicsU.S.A.,Inc.,EnglewoodCliffs,NJ.Allrightsreserved.“LGLife’sGood”isaregisteredtrademarkofLGCorp./www.lghvac.com
IndoorUnit
(
IDU
)
‐LCN187HV
LCN187HV, LCN247HV
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
14 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
Figure 5: LCN367HV, LCN427HV Indoor Unit Dimensions.
INDOOR UNIT DIMENSIONS
JobName/Location:
Tag#:
Date:
PONo.:
CeilingCassetteSingleZone
Page3of3DFS‐SB‐AC‐007‐US013E23
Forcontinualproductdevelopment,LGreservestherighttochangespecificationswithoutnotice.
©LGElectronicsU.S.A.,Inc.,EnglewoodCliffs,NJ.Allrightsreserved.“LGLife’sGood”isaregisteredtrademarkofLGCorp./www.lghvac.com
IndoorUnit
(
IDU
)
‐LCN367HV
LCN367HV, LCN 427HV
FOUR-WAY CASSETTE | 15
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ACOUSTIC DATA
Outdoor Units
•Measurements taken with no attenuation and units operating at full
load normal operating condition.
•Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
•Sound power levels are measured in dB(A)±3.
•Tested in anechoic chamber per ISO Standard 3745.
Table 4: Four-Way Ceiling Cassette Outdoor Unit Sound
Pressure Levels (dB[A]).
Model Sound Pressure Levels (dB[A])
Cooling Heating
LUU187HV 48 52
LUU247HV 48 52
LUU367HV 52 54
LUU427HV 52 54
Figure 6: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure
Level Measurement Location.
3.3 ft.
4.9 ft.
D
Figure 7: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure Level Diagrams.
LUU187HV, LUU247HV
LUU367HV, LUU427HV
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
▲ Cooling
Heating
▲ Cooling
Heating
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
16 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
4.9 ft.
Ceiling
Microphone
Figure 8: 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)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
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, LCN247HVLCN367HV, LCN427HV
Figure 9: Four-Way Ceiling Cassette Indoor Unit Sound Pressure Level Diagrams.
Table 5: Four-Way Ceiling Cassette Indoor Unit Sound Pressure Levels
(dB[A]).
Model Sound Pressure Levels (dB[A])
H M L
LCN187HV 38 36 34
LCN247HV 38 36 34
LCN367HV 46 44 43
LCN427HV 46 44 43
ACOUSTIC DATA
Indoor Units
FOUR-WAY CASSETTE | 17
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
AIR VELOCITY AND TEMPERATURE DISTRIBUTION
Figure 10: LCN187HV Air Velocity and Temperature Distribution Charts.
Figure 11: 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
6.6
4.6 4.6
3.3
3.3
Discharge angle: 50°
Air velocity [ft/s]
Temperature [°F]
91
91
86 86
81
81
75
75
72
72
75
75
6.6 6.6
3.3
3.3
1.6
1.6
68
6464
68
72
72
73
73
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
6.6
4.6 4.6
3.3
3.3
Discharge angle: 50°
Air velocity [ft/s]
Temperature [°F]
91
91
86 86
81
81
75
75
72
72
75
75
6.6 6.6
3.3
3.3
1.6
1.6
68
6464
68
72
72
73
73
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
18 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
Figure 12: LCN367HV Air Velocity and Temperature Distribution Charts.
Figure 13: 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
13.1
9.8
9.8
6.6
6.6
3.3
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
75
91 91
75
81 81
86 86
72
72
13.113.1
9.8 9.8
6.6
6.6
3.3
3.3
64
64
68
68
72
72
75
75
Cooling Heating
Discharge angle: 40°
Air velocity [ft/s]
Temperature [°F]
13.1
13.1
9.8
9.8
6.6
6.6
3.3
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
75
91 91
75
81 81
86 86
72
72
13.113.1
9.8 9.8
6.6
6.6
3.3
3.3
64
64
68
68
72
72
75
75
FOUR-WAY CASSETTE | 19
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
LCN187, 247, 367, 427HV Cooling / Heating Mode
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 6: Four-Way Ceiling Concealed Outdoor Unit Thermistor Details.
OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM
Refrigerant Flow
Cooling
Heating
MM
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
SVC
Figure 14: LUU187, 247, 367, 427HV Refrigerant Flow Diagram.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
20 |FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
INDOOR UNIT REFRIGERANT FLOW DIAGRAM
Table 7: Four-Way Ceiling Cassette Indoor Unit Refrigerant Pipe Connection Port Diameters.
Model No. Vapor (inch) Liquid (inch)
LC187HV, LC247HV,
LC367HV, LC427HV 5/8 3/8
Table 8: Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
Description (Based on Cooling Mode) PCB Connector
Indoor Air Temperature Thermistor CN-ROOM
Evaporator Inlet Temperature Thermistor CN-PIPE / IN
Evaporator Outlet Temperature Thermistor CN-PIPE / OUT
Heat exchanger Gas pipe connection port
(flare connection)
Liquid pipe connection port
(flare connection)
Turbo fan
Cooling
Heating
M
Indoor Air
Temperature Thermistor
Evaporator Inlet
Temperature Thermistor
Evaporator Outlet
Temperature Thermistor
Figure 15: LCN187, 247, 367, 427HV Refrigerant Flow Diagram.
LCN187, 247, 367, 427HV
Cooling / Heating Mode
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