FOUR-WAY
CEILING-CASSETTE SYSTEM
ENGINEERING MANUAL
Single-Zone Four-Way
Ceiling-Cassette
Heat Pump Systems
1.5 to 4 Tons
LC188HHV4 (18,000 Btu/h)
LC369HHV (36,000 Btu/h)
LC429HHV (42,000 Btu/h)
LC489HHV (48,000 Btu/h)
LC249HHV (24,000 Btu/h)
SINGLE-ZONE
For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.
© LG Electronics U.S.A., 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.
A summary list of safety precautions is on page 3.
For more technical materials such as submittals, catalogs, installation, best
practices, building ventilation, owner’s, and service manuals, visit
www.lghvac.com.
INTRODUCTION | 3
Introduction
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TABLE OF CONTENTS
TABLE OF SYMBOLS
D ANGER
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, will result in minor or moderate injury.
Note:
This symbol indicates situations that will result in equipment or property damage accidents only.
This symbol indicates an action that should not be performed.
Unit Nomenclature ..........................................................................................................................................................................................................4
LG Air Conditioner Technical Solution (LATS) .........................................................................................................................................................5-6
LGRED° Four-Way Ceiling-Cassette Product Data ................................................................................................................................................7-41
0HFKDQLFDO6SHFL¿FDWLRQV .........................................................................................................................................................................................8-9
General Data .........................................................................................................................................................................................................10-12
Electrical Data ............................................................................................................................................................................................................13
Functions, Controls, and Options ...............................................................................................................................................................................14
Outdoor Unit Dimensions ......................................................................................................................................................................................15-16
Outdoor Unit Center of Gravity / Corner Weights .......................................................................................................................................................17
Indoor Unit Dimensions .........................................................................................................................................................................................18-20
Acoustic Data ........................................................................................................................................................................................................21-24
Refrigerant Flow Diagrams ....................................................................................................................................................................................25-29
Wiring Diagrams ....................................................................................................................................................................................................30-34
Electrical Connections ...........................................................................................................................................................................................35-37
Air Velocity and Temperature Distribution ..............................................................................................................................................................38-39
Accessories ...........................................................................................................................................................................................................40-41
LGRED° Four-Way Ceiling-Cassette Performance Data ......................................................................................................................................42-60
Cooling Capacity ...................................................................................................................................................................................................43-47
Maximum Cooling Capacity ...................................................................................................................................................................................48-52
Heating Capacity ...................................................................................................................................................................................................53-55
Maximum Heating Capacity ...................................................................................................................................................................................56-58
Equipment Selection Procedure ............................................................................................................................................................................59-60
Placement Considerations .....................................................................................................................................................................................61-73
Indoor Unit .............................................................................................................................................................................................................62-63
Outdoor Unit ..........................................................................................................................................................................................................64-69
Installing Outdoor Units Indoors ............................................................................................................................................................................70-72
Refrigerant Piping Design ...........................................................................................................................................................................................73
4| INTRODUCTION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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UNIT NOMENCLATURE
C 188 H
System Type:
Style:
SV = High Efficiency Inverter
VP = Gallery
YV = Premier
EV = Mega
XV = Mega 115V
V = Standard Inverter
T = Thermostat Compatible
LV = Extended Piping
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
18 / 188 / 189 = 18,000
24 / 248 / 249 = 24,000
30 = 30,000
36 / 368 / 369 = 36,000
42 / 428 / 429 = 42,000
48 / 489 = 48,000
L V 4N
N: Indoor Unit
U: Outdoor Unit
No N or U: System
H = Heat Pump
Generation:
Single-Zone Indoor Units and Outdoor Units
H
System Type:
H = LGRED° Outdoor Unit
INTRODUCTION | 5
Introduction
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LG AIR CONDITIONER
TECHNICAL SOLUTION (LATS)
Figure 1: Example of LATS CAD2.
LG Air Conditioner Technical Solution (LATS) Software
A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist
engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning
systems. Contact your LG Rep for the best software program for your application.
To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all projects.
Formats
LATS is available to LG customers in three user interfaces: LATS HVAC, LATS CAD2, and LATS Revit. All three LATS formats are available
through www.myLGHVAC.com, or contact an LG Sales Representative.
LATS HVAC is a Windows
®
-based application that aids engineers in designing LG Variable Refrigerant Flow (VRF), Multi F / Multi F MAX,
Single-Zone, and Energy Recovery Ventilator (ERV) systems.
*Windows
®
is a registered mark of Microsoft
®
Corporation.
LATS CAD2 combines the LG LATS program with AutoCAD
®
software**. It permits engineers to layout and validate LG Multi V
Variable Refrigerant Flow (VRF), Multi F / Multi F MAX, Single-Zone,
and Energy Recovery Ventilator (ERV) systems directly into CAD
drawings.
LATS Revit integrates the LG LATS program with Revit
®
software**.
It permits engineers to layout and validate Multi V VRF systems
directly into Revit drawings.
**AutoCAD® and Revit® are both registered marks of Autodesk, Inc.
Features
All LG product design criteria have been loaded into the program,
making LATS simple to use: double click or drag and drop the
component choices. Build systems in Tree Mode where the
refrigerant system can be viewed. Switch to a Schematic diagram to
see the electrical and communications wiring.
LATS software permits the user to input region data, indoor and outdoor design temperatures, modify humidity default values, zoning, specify
type and size of outdoor units and indoor units, and input air flow and external static pressure (ESP) for ducted indoor units.
The program can also:
• Import building loads from a separate Excel file.
• Present options for outdoor unit auto selection.
• Automatically calculate component capacity based on design
conditions for the chosen region.
• Verify if the height differences between the various system
components are within system limits.
• Provide the correct size of each refrigerant piping segment and LG
Y-Branches and Headers.
• Adjust overall piping system length when elbows are added.
• Check for component piping limitations and flag if any parameters
are broken.
• Factor operation and capacity for defrost operation.
• Calculate refrigerant charge, noting any additional trim charge.
• Suggest accessories for indoor units and outdoor units.
• Run system simulation.
Features depend on which LATS program is being used, and the type of system being designed.
6| INTRODUCTION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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LATS Generates a Complete Project Report
LATS software also generates a report containing project design parameters, cooling and heating design data, system component
performance, and capacity data. The report includes system combination ratio and refrigerant charge calculations; and provides detailed bill
of material, including outdoor units, indoor units, control devices, accessories, refrigerant pipe sizes segregated by building, by system, by
pipe size, and by pipe segments. LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
Proper Design to Install Procedure
LG encourages a two report design-to-install-procedure. After the
design engineer determines building / zone loads and other details,
the engineer opens the LATS program and inputs the project’s
information. When the design is complete, the “Auto Piping” and
“System Check” functions must be used to verify piping sizes,
limitations, and if any design errors are present. If errors are found,
engineers must adjust the design, and run Auto Piping and System
Check again. When the design passes the checks, then the engineer
prints out a project “Shop Drawing” (LATS Tree Diagram) and
provides it to the installing contractor. The contractor must follow the
LATS Tree Diagram when building the piping system, but oftentimes
the design changes on the building site:
• Architect has changed location and/or purpose of room(s).
• Outdoor unit cannot be placed where originally intended.
• Structural elements prevent routing the piping as planned.
• Air conditioning system conflicts with other building systems (plumbing, gas lines, etc.).
The contractor must mark any deviation from the design on the Shop Drawing, including as-built straight lines and elbows. This “Mark Up”
drawing must be returned to the design engineer or Rep, who must input contractor changes into the LATS file. (Copy the original LATS
software file, save and rename as a separate file, and modify all piping lengths by double-clicking on each length and editing information.)
Like the shop drawing, the Auto Piping and System Check must also be run on this new “As Built” drawing. The design engineer or Rep must
then provide the final As Built file to the contractor. The Mark Up version must be compared to the As Built version for:
• Differences in pipe diameter(s). If incorrect diameters have been installed, the piping must be changed out. If pipe diameters have changed,
check to see if Y-Branches will also need to be changed.
• Changes to outdoor unit and indoor unit capacities. Capacities changes will impact line length changes.
• Additional refrigerant charge quantity (“Trim Charge”). Trim charge will change if piping lengths and diameters change. The As Built version
must reflect installed piping lengths to ensure correct trim charge.
All documents submitted by the contractor, as well as the Shop Drawing and the As Built Drawing files must be provided for commissioning
purposes. Model and serial numbers for all system components must also be submitted. If the steps previously detailed are not followed,
and all documents are not provided to the commissioning agent, the project runs the risk of not being commissioned and voiding any limited
warranty LG offers on the equipment.
Figure 2: Example of a LATS Tree Diagram.
LG AIR CONDITIONER
TECHNICAL SOLUTION (LATS)
Contact your LG representative for the best software program for your application.
PRODUCT DATA
Mechanical Specifications on page 8
General Data on page 10
Electrical Data on page 13
Functions, Controls, and Options on page 14
Outdoor Unit Dimensions on page 15
Outdoor Unit Center of Gravity / Corner Weights on page 17
Indoor Unit Dimensions on page 18
Acoustic Data on page 21
Refrigerant Flow Diagrams on page 25
Wiring Diagrams on page 30
Electrical Connections on page 35
Air Velocity and Temperature Distribution on page 38
Accessories on page 40
8| PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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MECHANICAL SPECIFICATIONS
General
System
LG single zone four-way ceiling cassette system comprises of a
single frame outdoor unit connected to a single indoor unit with a
single refrigerant circuit. An LG single zone four-way ceiling cassette
is a system that can operate in either cooling or heating mode.
The system is capable of changing mode within a maximum time
of three (3) minutes to ensure indoor temperature can be properly
maintained. LG components are manufactured in a facility registered
to ISO 9001 and ISO 14001, which is a set of standards applying
to environmental protection set by the International organization
for Standardization (ISO). The system components comply with
CSA Standard for Safety and bear the CSA 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 Standard 210 /
240 certified product directory.
Outdoor Unit
The outdoor units have sound levels not exceeding 56 dB(A) tested
in an anechoic chamber under ISO Standard 3745.
Indoor Unit
The indoor units have sound ratings no higher than 56 dB(A) as
tested per ISO Standard 3745.
Temperature Ranges
18,000, 24,000, 36,000, 42,000, and 48,000 Btu/h Ceiling
Cassette Operating Ranges
• Operating range for outdoor units of 5°F to +118°F (DB) for cooling
(Cooling range can be extended from 5°F down to -4°F using the
Low Ambient Wind Baffle Kit [sold separately]).
• Operating range for outdoor units of -13°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 (DB) 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 constructed 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.
The smart dual vane (for 24,000 Btu/h ~ 48,000 Btu/h indoor units
only) moves the air dynamically and evenly distributes air to every
corner of large space. The dual vane provides optimized angle and
provides conditioned air without feeling the draft.
A required architectural grille is sold as a separate required
accessory. The four-way grille is off-white acrylonitrile butadiene
styrene (ABS) polymeric resin with a tapered trim edge.
The unit has capability of sensing both temperature and humidity to
avoid over cooling and maximizing comfort using Humidity sensor
(sold separately).
Refrigerant System
The 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,
including 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. LUU420HHV and LUU480HHV include
a sub-cooled heat exchanger, vapor injection, and vapor bypass
circuit.
Compressors
All of the outdoor units are equipped with one hermetically sealed,
digitally controlled, inverter-driven R1 scroll compressor to modulate
capacity (modulation in 1 Hz increments). Teflon coated bearings,
overcurrent protection and vibration isolation are integrated with the
compressor.
Figure 3: Four-Way 18,000 Btu/h 2x2
Ceiling Cassette System (LC188HHV4).
PRODUCT DATA | 9
Product Data
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MECHANICAL SPECIFICATIONS
Frequency ranges for the 18,000 ~ 48,000 Btu/h outdoor
units are:
18k, 24k Btu/h = 10 to 95 Hz Cooling; 10 to 130 Hz Heating
36k Btu/h = 15 to 120 Hz Cooling; 15 to 135 Hz Heating
42k, 48K Btu/h = 10 to 120 Hz Cooling; 10 to 135 Hz Heating
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 minimum 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 18,000 Btu/h (LUU180HHV),and 24,000 Btu/h (LUU240HHV)
outdoor units include one direct drive, variable speed axial /
propeller type fan with a horizontal air discharge; the 36,000 Btu/h
(LUU360HHV), 42,000 Btu/h (LUU420HHV), and 48,000 Btu/h
(LUU480HHV) include two fans. Fan blades are made of Acrylonitrile
Butadiene Styrene (ABS) material, and have a Brushless Digitally
Controlled (BLDC) fan motor. The fan motor has inherent protection,
permanently lubricated bearings, and variable speed with a
maximum speed up to 750 rpm (cooling) and 800 rpm (heating).
Raised guards are provided to limit contact with moving parts.
Indoor Unit
All of the indoor units have a single, direct-drive, turbo fan
manufactured 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 vibration-
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, Power Heat, 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. For 2’
x 2’ cassettes the removable
washable filter size is 14” x 14”
x 1.”
For 3’ x 3’ cassettes the
removable washable filter size is
20.5” x 20.5” x 1.”
Electrical
The system was designed to
operate using 208–230/60/1
power with voltage variances of
±10% and includes overcurrent
protection. The indoor unit is
powered through the outdoor
unit.
Controls
Indoor and outdoor units are
factory wired with necessary
electrical control components,
printed circuit boards, thermistors, sensors, terminal blocks, and
lugs for power wiring. Factory installed microprocessor controls in
the outdoor unit and indoor unit shall perform functions to efficiently
operate the single zone system, communicating via a 14 AWG four-
conductor, stranded, shielded or unshielded (if shielded, must be
grounded to the chassis at the outdoor unit only) power/transmission
cable (and must comply with applicable local and national codes.
Microprocessor-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
condensate lift/pump capable of providing a maximum 31-1/2 inch
(18k, 24k, 36k, 42k, 48k 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.
Figure 4: Four-Way 36,000 to
48,000 Btu/h 3x3 Ceiling Cassette
System (LC369HHV, LC429HHV,
and LC489HHV Models).
10 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Outdoor Unit Model Indoor Unit Model Controller
LUU180HHV LCN188HV4 PQWRHQ0FDB
LUU240HHV LCN249HV AKB75735404
LUU360HHV, LUU420HHV, LUU480HHV LCN369HV
LCN429HV
LCN489HV
AKB75735404
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
Pairing Table
PRODUCT DATA | 11
Product Data
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GENERAL DATA
System (Model) (Indoor Unit / Outdoor Unit) LC188HHV4 (LCN188HV4 / LUU180HHV)
Ceiling Grille Model Number (Sold Separately) PT-UQC / PT-QCHW0
Cooling Capacity (Min ~ Rated ~ Max) (Btu/h)
7,200 ~ 18,000 ~ 24,800
Cooling Power Input
1
(kW)
0.53 ~ 1.41 ~ 2.85
Heating Capacity (Min ~ Rated ~ Max) (Btu/h)
6,500 ~ 20,000 ~ 23,700
Heating Power Input
1
(kW)
0.46 ~ 1.80 ~ 2.60
COP @47°F
3.25
Maximum Heating Capacity (Btu/h)
Outdoor 17°F (WB)/Indoor 70°F (DB)
22,610
Outdoor 5°F (WB)/Indoor 70°F (DB)
20,000
Outdoor 0°F (WB)/Indoor 70°F (DB)
18,850
Outdoor -4°F (WB)/Indoor 70°F (DB)
17,920
Outdoor -13°F (WB)/Indoor 70°F (DB)
15,990
EER
12.80
SEER
20.00
HSPF
11.20
Power Supply V, Ø, Hz
2
208-230 / 1 / 60
Outdoor Unit Operating Range
Cooling (°F DB)
5 to 118
7
Heating (°F WB)
-13 to +64
Indoor Unit Operating Range
Cooling (°F WB)
57 to 77
Heating (°F DB)
59 to 81
Indoor Temperature Setting Range
Cooling (°F DB)
65 to 86
Heating (°F DB)
61 to 86
Unit Data
Refrigerant Type
3
/ Refrigerant Control
R410A / EEV
IDU Sound Pressure Levels ±1 dB(A) (Max/H/M/L/SL)
4
43 / 41 / 39 / 36 / 33
Outdoor Unit Sound Pressure Level ±1 dB(A) (Cool/Heat)
4
51 / 52
Indoor Unit Net / Shipping Weight (lbs.)
31.5 / 40
Outdoor Unit Net / Shipping Weight (lbs.)
133.4 / 144.4
Grille Net / Shipping Weight (lbs.)
PT-UQC: 6.8 / 11.0; PT-QCHW0: 6.6 / 8.8
Power Wiring / Communications Cable (No. x AWG)
5
4 x 14
Compressor (Type x Qty.)
R1 Scroll x 1
Dehumidification Rate (pts./hr.)
4.28
Fan
Indoor Unit Type x Qty. / Outdoor Unit Type x Qty.
Turbo x 1 / Axial x 1
Motor / Drive
Brushless Digitally Controlled / Direct
Airflow Rate
Indoor Unit (Max / H / M / L [CFM])
494 / 460 / 424 / 388
Outdoor Unit (CFM)
2,048
Piping
Liquid (in.)
Connection Size
1/4 Flare
Pipe Size
3/8 Flare
Vapor (in.)
Connection Size
1/2 Flare
Pipe Size
5/8 Flare
Condensate Drain O.D. / I.D. (in.)
1-1/4 / 1
Additional Refrigerant Charge (oz./ft.)
0.43
Minimum / Maximum Pipe Length (ft.)
16.4 / 164
Piping Length
6
(no additional refrigerant, ft.)
24.9
Maximum Elevation Difference (ft.)
98.4
Table 2: Single-Zone LGRED Four-Way 2 x 2 Ceiling Cassette System General Data.
EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. 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).
1
Power Input is rated at high speed.
2
Power wiring to the ODU is field supplied, solid or stranded, and must comply with the applicable local
and national codes.
3
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.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745.
5
All power wiring/communication cables from ODU to IDU are field supplied and are to be minimum 14
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.
6
Piping lengths are equivalent.
7
Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
12 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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GENERAL DATA
Table 3: Single-Zone LGRED Four-Way 3 x 3 Ceiling Cassette System General Data.
EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. 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).
1
Power Input is rated at high speed.
2
Power wiring to the ODU is field supplied, solid or stranded, and must comply with the applicable local
and national codes.
3
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.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745.
5
All power wiring/communication cables from ODU to IDU are field supplied and are to be minimum 14
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.
6
Piping lengths are equivalent.
7
Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
System (Model) (Indoor Unit / Outdoor Unit)
LC249HHV
(LCN249HV/
LUU240HHV)
LC369HHV
(LCN369HV/
LUU360HHV)
LC429HHV
(LCN429HV/
LUU420HHV)
LC489HHV
(LCN489HV/
LUU480HHV)
Ceiling Grille Model Number (Sold Separately) PT-AAGW0 PT-AAGW0 PT-AAGW0 PT-AAGW0
Cooling Capacity (Min ~ Rated ~ Max) (Btu/h)
9,600~24,000~30,000 14,400~36,000~46,000 16,800~42,000~49,000 19,200~ 48,000~53,000
Cooling Power Input
1
(kW)
0.48~1.905~3.00 0.72~2.858~5.410 0.93~3.28~5.50 1.09~3.84~5.82
Heating Capacity (Min ~ Rated ~ Max) (Btu/h)
10,800~27,000~33,000 16,000~40,000~46,000 18,000~48,000~57,600 19,000~52,000~61,000
Heating Power Input
1
(kW)
0.57~2.25~3.80 0.80~3.20~4.70 1.17~3.405~5.80 1.40~3.85~6.20
COP @47°F
3.51 3.66 4.13 3.95
Maximum Heating Capacity (Btu/h)
Outdoor 17°F (WB)/Indoor 70°F (DB)
29,100 42,100 51,400 55,100
Outdoor 5°F (WB)/Indoor 70°F (DB)
27,000 40,000 48,000 52,000
Outdoor 0°F (WB)/Indoor 70°F (DB)
25,560 37,760 45,200 47,410
Outdoor -4°F (WB)/Indoor 70°F (DB)
24,410 35,970 42,970 43,740
Outdoor -13°F (WB)/Indoor 70°F (DB)
21,610 30,000 35,990 35,980
EER
12.60 12.60 12.80 12.50
SEER
21.00 21.50 19.50 17.50
HSPF
10.20 11.00 11.60 11.70
Power Supply V, Ø, Hz
2
208-230 / 1 / 60
Outdoor Unit Operating Range
Cooling (°F DB)
5 to 118
7
Heating (°F WB)
-13 to +64
Indoor Unit Operating Range
Cooling (°F WB)
57 to 77
Heating (°F DB)
59 to 81
Indoor Temperature Setting Range
Cooling (°F DB)
60 to 86
Heating (°F DB)
60 to 86
Unit Data
Refrigerant Type
3
/ Refrigerant Control
R410A / EEV
IDU Sound Pressure Levels ±1 dB(A) (Mx/H/M/L/SL)
4
48 / 40 / 37 / 35 / 32 55 / 44 / 42 / 41 / 40 56 / 46 / 43 / 41 / 39 56 / 46 / 43 / 41 / 39
ODU Sound Pressure Level ±1 dB(A) (Cool/Heat)
4
51 / 52 52 / 54 54 / 56 54 / 56
Indoor Unit Net / Shipping Weight (lbs.)
45.2 / 54.9 55.8 / 67.7 59.5 / 70.5 59.5 / 70.5
Outdoor Unit Net / Shipping Weight (lbs.)
133.4 / 144.4 198.9 / 223.1 210.9 / 234.1 210.9 / 234.1
Grille Net / Shipping Weight (lbs.)
15.6 / 20.5 15.6 / 20.5 15.6 / 20.5 15.6 / 20.5
Power Wiring / Communications Cable (No. x AWG)
5
4 x 14
Compressor (Type x Qty.)
R1 Scroll x 1
Dehumidification Rate (pts./hr.)
3.80 7.10 7.27 9.74
Fan
Indoor Unit Type x Qty. / Outdoor Unit Type x Qty.
Turbo x 1 / Axial x 1 Turbo x 1 / Axial x 2
Motor / Drive
Brushless Digitally Controlled / Direct
Airflow Rate
Indoor Unit (Cooling, Max / H / M / L [CFM])
794 / 671 / 600 / 530 1,200 / 971 / 883 / 794 1,483 / 1,130 / 953 / 812
Outdoor Unit (CFM)
2,048 4,238
Piping
Liquid (in.)
Connection Size
3/8 Flare
Pipe Size
3/8 Flare
Vapor (in.)
Connection Size
5/8 Flare
Pipe Size
5/8 Flare
Condensate Drain O.D. / I.D. (in.)
1-1/4 / 1
Additional Refrigerant Charge (oz./ft.)
0.43
Minimum / Maximum Pipe Length (ft.)
16.4 / 164 16.4 / 246
Piping Length
6
(no additional refrigerant, ft.)
24.9
Maximum Elevation Difference (ft.)
98.4
PRODUCT DATA | 13
Product Data
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Nominal
Tons
Unit Model
No.
Hertz Voltage
Voltage
Range
(Min. to Max.)
MCA MOP
Compressor
Quantity
Compressor
Motor RLA
Locked
Rotor
Amps
Outdoor Unit
Fan Motor
Indoor Unit Fan
Motor
W FLA W. FLA
Cooling Heating
2 x 2 Four-Way Ceiling Cassettes
1-1/2 LC188HHV4 60 208 - 230 187 - 253 22 30 1 14.5 14.5 23 460 x 1 1.6 x 1 170 0.6
3 x 3 Four-Way Ceiling Cassettes
2 LC249HHV
60 208 - 230 187 - 253
22 30
1
14.5 14.5 23 460 x 1 1.6 x 1 170 0.6
3 LC369HHV
32 40 22 22 33 280 x 2 1.6 x 2
230 1.0
3-1/2 LC429HHV
260 1.3
4 LC489HHV
Voltage tolerance is ±10%.
Maximum allowable voltage unbalance is 2%.
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.
RLA = Rated Load Amps.
FLA = Full Load Amps.
Table 4: Electrical Data.
ELECTRICAL DATA
14 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Table 5: Functions, Controls and Options.
1
Primary washable filter. 14”x14”x1” for 2x2 units; 20.5”x20.5”x1” for 3x3 units.
2
Requires wired zone controller.
¥ 6WDQGDUGIHDWXUH o = Unit option X = Not Available
FUNCTIONS, CONTROLS, AND OPTIONS
System Type 2x2 Cassette 18K 3x3 Cassette 24K 3x3 Cassette 36K 3x3 Cassette 42K / 48K
$LUÀRZ
Air Supply Outlets
4444
Airflow Direction Control
Auto ¥6L[6WHSV ¥6L[6WHSV ¥6L[6WHSV
Auto Swing (Up and Down)
¥ ¥¥¥
Airflow Steps (Fan / Cool / Heat)
4 / 5 / 5 4 / 5 / 5 4 / 5 / 5 4 / 5 / 5
Jet Cool / Jet Heat (Power Wind)
¥ ¥¥ ¥¥ ¥¥
Swirl Wind
X ¥¥¥
Refresh Mode
X ¥¥¥
Smart Mode
X ¥¥¥
Indirect Wind
X ¥¥¥
Direct Wind
X ¥¥¥
Filters
Long Life Pre-filter (Washable / Anti-fungal)
1
¥ ¥¥¥
Oper.
Drain Pump
¥ ¥¥¥
High Ceiling Operation
2
¥ ¥¥¥
Reliability
Hot Start
¥ ¥¥¥
Self Diagnosis
¥ ¥¥¥
De-ice Control (Defrost)
¥ ¥¥¥
Dry (Dehumidification) Operation
¥ ¥¥¥
Convenience
Auto Changeover
¥ ¥¥¥
Auto Cleaning (Coil Dry)
¥ ¥¥¥
Auto Restart
¥ ¥¥¥
Child Lock
2
¥ ¥¥¥
Forced Cooling Operation (Outdoor Unit)
¥ ¥¥¥
Sleep Mode
¥ ¥¥¥
Timer: 24 hour (On / Off) / 7 hour (Off)
¥¥ ¥¥ ¥¥ ¥¥
Timer: Weekly
2
¥ ¥¥¥
Two Thermistor Control
2
¥ ¥¥¥
Low Ambient Operation
¥ ¥¥¥
Overheating Protection
X ¥¥¥
ODU Silent Mode / Night Low Noise Operation
¥ ¥¥¥
Smart Diagnosis
¥¥¥¥
Indoor Unit Display Type
X One LED One LED One LED
Indoor Unit Display Light
X On / Off On / Off On / Off
Ener.
Sav.
Energy Saving
X ¥¥¥
Energy Control
X ¥¥¥
Netwk.
Func.
Network Solution (LGAP)
¥ ¥¥¥
Controllers
3
Programmable Controllers (MultiSITE CRC1 / +)
o (PREMTBVC0 / PREMTBVC1)
Simple Remote Controller
o (PREMTC00U)
o (PREMTC00U)
3
o (PREMTC00U)
3
o (PREMTC00U)
3
Premium Remote Controller
o (PREMTA000) o (PREMTA000) o (PREMTA000) o (PREMTA000)
Wireless Handheld Remote Controller
¥34:5+4)'% ¥$.% ¥$.% ¥$.%
Remote Temperature Button Sensor
o (ZRTBS01) o (ZRTBS01) o (ZRTBS01) o (ZRTBS01)
Dry Contact
o (PDRYCB100 / 320 / 400)
PI-485
o (PMNFP14A1) o (PMNFP14A1) o (PMNFP14A1) o (PMNFP14A1)
Cntrl. Contl./
Integ. Sol.
AC Smart 5
o (PACS5A000) o (PACS5A000) o (PACS5A000) o (PACS5A000)
ACP 5
o (PACP5A000) o (PACP5A000) o (PACP5A000) o (PACP5A000)
MultiSITE Communications Manager
o (PBACNBTR0A) o (PBACNBTR0A) o (PBACNBTR0A) o (PBACNBTR0A)
MultiSITE VM3
o (PBACNBTR1A) o (PBACNBTR1A) o (PBACNBTR1A) o (PBACNBTR1A)
Special
Function
Aux. Heat Relay Kit
o (PRARH1) o (PRARH1) o (PRARH1) o (PRARH1)
Wi-Fi
3
o (PWFMDD200) o (PWFMDD200) o (PWFMDD200) o (PWFMDD200)
Wind Baffle Kit
¥=/$%*3$ ¥=/$%*3$ ¥=/$%*3$[ ¥=/$%*3$[
Sheath Heater (Drain Pan Heater)
¥ ¥¥¥
Smart Inverter Monitoring System (SIMS)
o (PSWMOZ3) o (PSWMOZ3) o (PSWMOZ3) o (PSWMOZ3)
Other
Mode Lock
Cooling Only or Heating Only
Temperature Control
¥ ¥¥¥
3
Not all controllers can support all features.
Contact your LG representative for details.
PRODUCT DATA | 15
Product Data
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OUTDOOR UNIT DIMENSIONS
LUU180HHV, LUU240HHV
Figure 5: LUU180HHV, LUU240HHV Outdoor Unit Dimensions.
16 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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OUTDOOR UNIT DIMENSIONS
LUU360HHV, LUU420HHV, LUU480HHV
Figure 6: LUU360HHV, LUU420HHV, LUU480HHV Outdoor Unit Dimensions.
PRODUCT DATA | 17
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OUTDOOR UNIT CENTER OF GRAVITY /
CORNER WEIGHTS
Model No.
Weight (lb.) Center of Gravity (in.) Leg (in.) Corner Weight (lb.)
Shipping Net a b c d e A B C D
LUU180HHV 144.4 133.4 23-7/32 12-19/32 5-29/32 24-13/32 14-3/16 18.8 26.4 51.4 36.7
LUU240HHV 144.4 133.4 23-7/32 12-19/32 5-29/32 24-13/32 14-3/16 18.8 26.4 51.4 36.7
• Design features and information of indoor and outdoor unit may be changed without notifications due to our policy of innovation.
• The center of gravity and corner weight may be different from the actual values because these are simulation results.
Model No.
Weight (lb.) Center of Gravity (in.) Leg (in.) Corner Weight (lb.)
Shipping Net a b c d e A B C D
LUU360HHV 223.1 198.9 27-7/32 21-15/32 6-5/8 24-13/32 14-3/16 16.3 18.6 87.4 76.6
LUU420HHV 234.1 210.9 27-7/32 21-15/32 6-5/8 24-13/32 14-3/16 17.28 19.72 92.7 81.21
LUU480HHV 234.1 210.9 27-7/32 21-15/32 6-5/8 24-13/32 14-3/16 17.28 19.72 92.7 81.21
Table 6: LUU180HHV and LUU240HHV Center of Gravity and Corner Weights.
Table 7: LUU360HHV, LUU420HHV, and LUU480HHV Center of Gravity and Corner Weights.
Figure 7: LUU180HHV and LUU240HHV Center of Gravity and Corner Weight Diagram.
Figure 8: LUU360HHV, LUU420HHV, and LUU480HHV Center of Gravity and Corner Weight Diagram.
18 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Figure 9: LCN188HV4 Indoor Unit Dimensions.
INDOOR UNIT DIMENSIONS
LCN188HV4
Unit: Inch (mm)
2-51/64
(71)
5-29/32
(150)
7/64
(3)
2-3/4
(70)
6-3/16
(157)
7-9/16
(192)
23-5/8 (600) (Ceiling Opening)
23-5/8 (600) (Ceiling Opening)
20-23/64 (517) (Hanging Bolt)
20-23/64 (517) (Hanging Bolt)
10-13/64 (259)
10-13/64 (259)
10-13/64 (259)
10-13/64 (259)
20-19/32 (523) (Hanging Bolt)
18-5/32 (461) (Hanging Bolt)
22-7/16 (570)
22-7/16 (570)
5-19/32
(142)
1-31/32
(50)
1-3/16
(30)
63/64
(25)
63/64
(25)
7-13/64
(183)
1-11/32
(34)
3-1/2
(89)
6-1/16
(154)
24-13/32 (620)
14-29/32 (379) (Air Outlet Hole)
24-13/32 (620)
14-29/32 (379)
(Air Outlet Hole)
Max. Condensate Lift: 31-1/2
(800) or less
7-61/64
(202)
7-61/64
(202)
11
(279)
1
11
32
24-13/32 (620)
24-13/32 (620)
PT-QCHW0
PRODUCT DATA | 19
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Figure 10: LCN249HV Indoor Unit Dimensions.
INDOOR UNIT DIMENSIONS
LCN249HV
Note:
20 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Figure 11: LCN369HV, LCN429HV, LCN489HV Indoor Unit Dimensions.
INDOOR UNIT DIMENSIONS
LCN369HV, LCN429HV, LCN489HV
Note:
PRODUCT DATA | 21
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4.9 ft.
Ceiling
Microphone
Figure 12: 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 pressure levels are measured in dB(A)±1.
• Tested in anechoic chamber per ISO Standard 3745.
Figure 13: Four-Way Ceiling Cassette Indoor Unit
Sound Pressure Level Diagrams.
Table 8: Four-Way Ceiling Cassette Indoor Unit Sound Levels (dB[A]).
Model
Sound Pressure Levels (dB[A])
Cooling Heating
HMLHML
LCN188HV4 41 39 36 41 39 36
LCN249HV 40 37 35 40 37 35
LCN369HV 44 42 41 44 42 41
LCN429HV 46 43 41 46 43 41
LCN489HV 46 43 41 46 43 41
ACOUSTIC DATA
Indoor Units
LCN188HV4
LCN249HV LCN369HV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
Octave Band Center Frequency (Hz)
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
High
Middle
Low
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
Octave Band Center Frequency (Hz)
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
High
Middle
Low
LCN429HV, LCN489HV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
Octave Band Center Frequency (Hz)
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
High
Middle
Low
22 | PRODUCT DATA
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ACOUSTIC DATA
Indoor Units
Table 9: Four-Way Ceiling Cassette Indoor Unit Sound Power Levels
(dB[A]).
Model Sound Power Levels (dB[A])
LCN188HV4 -
LCN249HV 57
LCN369HV 61
LCN429HV 62
LCN489HV 62
• Data is valid under diffuse field conditions.
• Data is valid under nominal operating conditions.
• Sound power level is measured using rated conditions, and tested
in a reverberation room per ISO 3741 standards.
• Sound power level will vary depending on a range of factors such
as construction (acoustic absorption coefficient) of particular area
in which the equipment is installed
• 5HIHUHQFHDFRXVWLFLQWHQVLW\G% (ȝ:P
2
Figure 14: Four-Way Ceiling Cassette Indoor Unit Sound Power Level Diagrams.
LCN249HV
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
Sound Power Level (0dB = 10E-6ȝW/m
2
)
Octave Band Center Frequency (Hz)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
LCN369HV
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
S
oun
d
P
ower
L
eve
l
(0dB
=
10E
-
6
ȝW/m
2
)
Octave Band Center Frequency (Hz)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
LCN429HV, LCN489HV
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
Sound Power Level (0dB = 10E-6ȝW/m
2
)
Octave Band Center Frequency (Hz)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
PRODUCT DATA | 23
Product Data
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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 pressure levels are measured in dB(A)±1.
• Tested in anechoic chamber per ISO Standard 3745.
Table 10: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure Levels (dB[A]).
Figure 15: Four-Way Ceiling Cassette Outdoor Unit
Sound Pressure Level Measurement Location.
3.3 ft.
4.9 ft.
D
Figure 16: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure Level Diagrams.
Model
Sound Pressure Levels (dB[A])
Cooling Heating
LUU180HHV 51 52
LUU240HHV 51 52
LUU360HHV 52 54
LUU420HHV 54 56
LUU480HHV 54 56
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
02 = Bd0( leveL erusserP dnuoS dnaB evatcO ȝPa )
Octave Band Center Frequency (Hz)
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
LUU180HHV, LUU240HHV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (dB = 20ȝPa)
Octave Band Center Frequency (Hz)
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Ŷ Cooling
ŸHeating
LUU360HHV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
02 = Bd0( leveL erusserP dnuoS dnaB evatcO ȝPa )
Octave Band Center Frequency (Hz)
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
LUU420HHV, LUU480HHV
24 | PRODUCT DATA
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ACOUSTIC DATA
Outdoor Units
Figure 17: Four-Way Ceiling Cassette Outdoor Unit Sound Power Level Diagrams.
• Data is valid under diffuse field conditions.
• Data is valid under nominal operating conditions.
• Sound power level is measured using rated conditions, and tested
in a reverberation room per ISO 3741 standards.
• Sound power level will vary depending on a range of factors such
as construction (acoustic absorption coefficient) of particular area
in which the equipment is installed
• 5HIHUHQFHDFRXVWLFLQWHQVLW\G% (ȝ:P
2
Table 11: Four-Way Ceiling Cassette Outdoor Unit Sound Power Levels
(dB[A]).
Model Sound Power Levels (dB[A])
LUU180HHV 67
LUU240HHV 67
LUU360HHV 69
LUU420HHV 71
LUU480HHV 71
LUU180HHV, LUU240HHV
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
Sound Power Level (0dB = 10E-6ȝW/m
2
)
Octave Band Center Frequency (Hz)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
Sound Power Level (0dB = 10E-6ȝW/m
2
)
Octave Band Center Frequency (Hz)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
LUU360HHV
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
110.0
120.0
125 250 500 1000 2000 4000 8000
S
oun
d
P
ower
L
eve
l
(0dB
=
10E
-
6
ȝW/m
2
)
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
NR-75
NR-25
NR-20
NR-80
NR-85
NR-90
NR-95
NR-100
NR-105
NR-110
LUU420HHV, LUU480HHV
Octave Band Center Frequency (Hz)
PRODUCT DATA | 25
Product Data
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REFRIGERANT FLOW DIAGRAMS
Table 12: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
Model No. Vapor (inch) Liquid (inch)
LCN188HV4 1/2 1/4
Table 13: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Refrigerant Pipe
Connections.
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 18: LCN188HV4 Refrigerant Flow Diagram.
LCN188HV4 Indoor Units
Table 14: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Refrigerant Pipe Sizes.
Model No. Vapor (inch) Liquid (inch)
LCN188HV4 5/8 3/8
Table 15: LCN188HV4 Connection Socket Dimensions.
Model No. Vapor (inch) Liquid (inch)
LCN188HV4 Ø1/2 – Ø5/8 Ø1/4 – Ø3/8
Figure 19: LCN188HV4 Refrigerant Pipe Connections.
1/2 in. to 5/8 in.
Connection
Ø5/8 in.
Connection socket
Flare nut
Piping
Ø1/2 in.
1/4 in. to 3/8 in.
Connection
Flare side to indoor unit
Ø3/8 in.
Connection socket
Flare nut
Piping
Ø1/4 in.
Flare side to indoor unit
Flare
side pipe
from ODU
Flare
side to
ODU
26 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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LCN249HV, LCN369HV Indoor Units
Table 16: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Thermistor
Details.
Model No. Vapor (inch) Liquid (inch)
LCN249HV, LCN369HV 5/8 3/8
Table 17: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Refrigerant
Pipe Connections.
Description (Based on Cooling Mode) PCB Connector
Suction Air Temperature Thermistor CN_ROOM
Evaporator Inlet Temperature Thermistor CN_PIPE_IN
Evaporator Outlet Temperature Thermistor CN_PIPE_OUT
Humidity Sensor CN_ROOM_HUMID
Table 18: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Refrigerant
Pipe Sizes.
Model No. Vapor (inch) Liquid (inch)
LCN249HV, LCN369HV 5/8 3/8
REFRIGERANT FLOW DIAGRAMS
Figure 20: LCN249HV, LCN369HV Refrigerant Flow Diagram.
Heat Exchanger
Gas Pipe Connection Port
(Flare Connection)
Liquid Pipe Connection Port
(Flare Connection)
Cooling
Heating
Turbo Fan
M
Suction Air
Temperature
Thermistor
Evaporator Inlet
Temperature Thermistor
Humidity Sensor
Evaporator Outlet
Temperature Thermistor
PRODUCT DATA | 27
Product Data
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Table 19: LCN429HV, LCN489HV Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
Model No. Vapor (inch) Liquid (inch)
LCN429HV, LCN489HV 5/8 3/8
Table 20: LCN429HV, LCN489HV Four-Way Ceiling Cassette Indoor Unit Refrigerant
Pipe Connections.
Thermistor Description (Based on Cooling Mode) PCB Connector
Th1 Indoor Air Temperature Thermistor CN_ROOM
Th2 Evaporator Inlet Temperature Thermistor CN_PIPE_IN
Th3 Evaporator Outlet Temperature Thermistor CN_PIPE_OUT
H1 Humidity Sensor CN_ROOM_HUMID
Table 21: LCN429HV, LCN489HV Four-Way Ceiling Cassette Indoor Unit Refrigerant
Pipe Sizes.
Model No. Vapor (inch) Liquid (inch)
LCN429HV, LCN489HV 5/8 3/8
LCN429HV, LCN489HV Indoor Units
REFRIGERANT FLOW DIAGRAMS
Figure 21: LCN429HV, LCN489HV Refrigerant Flow Diagram.
: Cooling
: Heating
Th3
Th2
M
(3D Turbo Fan)
H1Th1
28 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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LUU180HHV, LUU240HV, LUU360HV Outdoor Units
Description PCB Connector
Discharge Pipe Temperature Thermistor CN_DISCHARGE_BK
Suction Pipe Temperature Thermistor CN_SUCTION_GR
Condenser Outlet Pipe Temperature Thermistor CN_C_PIPE_VI
Air Temperature Thermistor CN_AIR_YL
Condenser Middle Pipe Temperature Thermistor CN_MID_BR
Pressure Sensor CN_H_PRESS_RD
Table 22: LUU180HHV, LUU240HHV, LUU360HHV Four-Way Ceiling Cassette Outdoor Unit Thermistor Details.
REFRIGERANT FLOW DIAGRAMS
Figure 22: LUU180HHV, LUU240HHV, LUU360HHV Refrigerant Flow Diagram.
36,000 Btu/h Outdoor
Units have two (2)
fans.
Condenser
Middle Pipe
Temperature
Thermistor
Condenser
Outlet Pipe
Temperature
Thermistor
Ø3/8 Inch
Ø5/8 Inch
Liquid Side
Piping
Vapor Side
Piping
SVC
SVC
High Pressure
Sensor
PRODUCT DATA | 29
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LUU420HHV, LUU480HHV Outdoor Units
REFRIGERANT FLOW DIAGRAMS
Figure 23: LUU420HHV, LUU480HHV Refrigerant Flow Diagram.
M
S
Description PCB Connector
Discharge Pipe Temperature Thermistor CN_DISCHARGE_BK
Suction Pipe Temperature Thermistor CN_SUCTION_GR
Condenser Outlet Pipe Temperature Thermistor CN_C_PIPE_VI
Air Temperature Thermistor CN_AIR_YL
Condenser Middle Pipe Temperature Thermistor CN_MID_BR
Vapor Injection Inlet Temperature Thermistor CN_VI_IN_WH
Vapor Injection Outlet Temperature Thermistor CN_VI_OUT_BL
Pressure Sensor CN_H_PRESS_RD
Table 23: LUU420HHV, LUU480HHV Four-Way Ceiling Cassette Outdoor Unit Thermistor Details.
30 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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LCN188HV4 Indoor Units
WIRING DIAGRAMS
Figure 24: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Wiring Diagram.
PRODUCT DATA | 31
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WIRING DIAGRAMS
LCN249HV, LCN369HV Indoor Units
Figure 25: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Wiring Diagram.
07/20
32 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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WIRING DIAGRAMS
LCN429HV, LCN489HV Indoor Units
Figure 26: LCN429HV, LCN489HV 3x3 Four-Way Ceiling Cassette Indoor Unit Wiring Diagram.
07/20
PRODUCT DATA | 33
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WIRING DIAGRAMS
LUU180HHV, LUU240HHV Outdoor Units
07/20
Figure 27: LUU180HHV, LUU240HHV Outdoor Unit Wiring Diagram.
34 | PRODUCT DATA
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WIRING DIAGRAMS
LUU360HHV, LUU420HHV, LUU480HHV Outdoor Units
Figure 28: LUU360HHV, LUU420HHV, LUU480HHV Outdoor Unit Wiring Diagram.
07/20
PRODUCT DATA | 35
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ELECTRICAL CONNECTIONS
• Terminal screws will become loose during transport. Properly tighten the terminal connections during installation or risk electric shock, phys-
ical injury, or death.
• Loose wiring will cause unit to malfunction, overheat, and catch fire, resulting in severe injury or death.
• Terminal screws will loosen during transport. Properly tighten the terminal connections during installation or risk equipment malfunction or
property damage.
• Loose wiring will cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is a risk of equipment malfunc-
tion or property damage.
A voltage drop will cause the following problems:
• Magnetic switch vibration, fuse breaks, or disturbance to the normal function of an overload protection device.
• Compressor will not receive the proper starting current.
WARNING
General Power Wiring / Communications Cable Guidelines
• Follow manufacturer’s circuit diagrams displayed on the inside of the control box cover.
• Confirm power source specifications.
• Properly ground the outdoor unit and the indoor unit per National Electrical Code (NEC) and local codes.
• Connect the wiring firmly so that the wires cannot be easily pulled out.
• Confirm that the electrical capacity is sufficient.
• Power supply to the outdoor unit must be selected based on NEC and local codes. Maximum allowable voltage fluctuation ±10% or name-
plate rated value.
• It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
• Include a disconnect in the power wiring system. Add an air gap contact separation of at least 1/8 inch in each active (phase) conductor.
• Any openings where the field wiring enters the cabinet must be completely sealed.
Do not install power wiring to the outdoor unit and the communication / connection (power) cable from the outdoor unit to the indoor unit
in the same conduit. Use separate conduits.
Power Wiring / Communications Cable Specifications
• Power wiring to the outdoor unit must be solid or stranded, and must comply with the applicable local and national electric codes.
• Communication / connection (power) cable from the outdoor unit to the indoor unit must be a minimum of 14 AWG, four (4) conductor,
stranded, shielded or unshielded (if shielded, must be grounded to chassis at the outdoor unit only) and must comply with applicable local
and national codes.
• Communication cable from the indoor unit to optional remote controller is to be 22 AWG, three (3) conductor, twisted, stranded, unshielded.
Wiring must comply with all applicable local and national codes.
36 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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ELECTRICAL CONNECTIONS
Figure 29: General Four-Way Ceiling Cassette System Power / Communications System Schematic (Appearances May Vary).
Controller Options
Single Zone LGRED Four-Way Ceiling Cassette systems include a wireless handheld remote controller
(18,000 Btu/h models Model No. PQWRHQ0FDB; Part No. AKB73757604 for 18,000 Btu/h cassette
indoor units; Part No. AKB75735404 for 24,000 to 48,000 Btu/h cassette indoor units). Optional
LG-suppled wired controllers are available. See “Functions, Controls, Options”, or contact an LG
representative for more information.
Wireless Handheld Remote Controller features:
• Display Panel: Displays operation conditions.
• On / Off Buttons: Turns system operation on and off.
• Mode Button: Selects the operation mode: Cooling, Heating, Auto, Dry (Dehumidification), or Fan.
• Temp Up / Down Buttons: Adjusts the desired room temperature in the different modes.
• Fan Speed Button: Sets desired fan speed.
• Reset: Initializes the handheld remote control settings.
Wired Controller Connections
Optional controllers (see “Functions, Controls, Options”, or contact an LG representative for more
information) can connect to the Four-Way Ceiling Cassette indoor unit in one of two different ways.
1. LG Wired Remote Extension Cable with Molex plug (PZCWRC1; sold separately) that connects to the
CN-REMO terminal on the indoor unit PCB.
2. Field-supplied controller cable that connects to the indoor unit terminal block (must be at least
UL2547 or UL1007, and at least FT-6 rated if local electric and building codes require plenum cable
usage). Communication cable from indoor unit to remote controller(s) is to be 22 AWG, 3-conductor,
twisted, stranded, unshielded. Wiring must comply with all applicable local and national codes.
• Use a conduit for the communications cable / power wiring from the outdoor unit to the indoor units.
• Make sure the communications cable / power wiring from the outdoor units to the indoor units, and the power wiring to the outdoor unit are
separate, otherwise, the outdoor unit operation will be affected by electrical noise and will malfunction or fail.
Figure 30: PQWRHQ0FDB
(AKB73757604) Wireless Hand-
held Remote Controller for 18,000
Btu/h Cassette Indoor Units.
L
L
N
N
G
Power Supply
Main Switch
Circuit Breaker
Fuse
Power Wiring
(Including Ground)
Outdoor Unit
1(L1)
or
L(L1)
2(L2)
or
N(L2)
Terminal Block Outdoor
3
Terminal Block Outdoor
Communication
Cable
Terminal Block Indoor
3
Power
Wiring
Indoor Unit
1(L1)
or
L(L1)
2(L2)
or
N(L2)
1(L1) or
L(L1)
2(L2) or
N(L2)
PRODUCT DATA | 37
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Figure 31: Proper Location for the Wired Controller.
4 to 5 feet
above the floor
NO
NO
NO
YES
Remote Controlle r
TEMP
Remote Controlle r
TEMP
R
e
m
o
t
e
C
o
n
t
r
o
l
l
e
r
TE
M
P
Wired Controller Placement
Wired controllers include a sensor to detect room temperature.
To maintain comfort levels in the conditioned space, the wired
controller must be installed in a location away from direct sunlight,
high humidity, and where it could be directly exposed to cold air.
Controller must be installed four (4) to five (5) feet above the floor
where its LED display can be read easily, in an area with good air
circulation, and where it can detect an average room temperature.
Do not install the wired controller near or in:
• Drafts or dead spots behind doors and in corners.
• Hot or cold air from ducts.
• Radiant heat from the sun or appliances.
• Concealed pipes and chimneys.
• An area where temperatures are uncontrolled, such as an outside
wall.
Assigning the Thermistor for Temperature Detection
Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice
of sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller. It is also an option to set
both thermistors to sense temperature so that indoor unit bases its operation on the first thermistor to reach the designated temperature
differential.
Figure 32: PZCWRC1 LG Wired Remote Extension Cable.
Verify the connectors are properly inserted.
C/BOX Cable (Plug type)
Extension cable
To Indoor Unit
CN-REMO
Terminal
TEMP
FAN
SPEED
OPER
MODE
Figure 33: Wired Controller Connection (Example Only).
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to black (ground wire) terminals from the remote controller to the indoor unit terminal blocks.
Indoor Unit Terminal Block
1 or
L (L1)
2 or N
(L2)
GND
3
GRN /
YLW
BR
BL
RD
CN-REMO
ELECTRICAL CONNECTIONS
38 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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AIR VELOCITY AND
TEMPERATURE DISTRIBUTION
Figure 34: LCN188HV4 Air Velocity and Temperature Distribution Charts.
Figure 35: LCN249HV Air Velocity and Temperature Distribution Charts.
Cooling
Discharge angle: Outer - 30°, Inner - 67°
Air velocity [ft/s]
Temperature [°F]
8.9 ft
6.6 ft
3.3 ft
0 ft
13.1 ft9.8 ft6.6 ft3.3 ft0 ft3.3 ft6.6 ft9.8 ft13.1 ft
8.9 ft
6.6 ft
3.3 ft
0 ft
13.1 ft9.8 ft6.6 ft3.3 ft0 ft3.3 ft6.6 ft9.8 ft13.1 ft
Heating
Discharge angle: Outer - 36°, Inner - 70°
Air velocity [ft/s]
Temperature [°F]
8.9 ft
6.6 ft
3.3 ft
0 ft
13.1 ft9.8 ft6.6 ft3.3 ft0 ft3.3 ft6.6 ft9.8 ft13.1 ft
8.9 ft
6.6 ft
3.3 ft
0 ft
13.1 ft9.8 ft6.6 ft3.3 ft0 ft3.3 ft6.6 ft9.8 ft13.1 ft
6.6 6.6
4.9
4.9
3.3 3.3
1.6
1.6
0.8 0.8
4.9 4.9
3.3 3.3
1.6
1.6
0.8
0.8
0.8 0.8
64.4 64.4
68
68
71.6
71.6
71.6 71.6
75.275.2
78.8
78.8
82.482.4
86 86
89.689.6
93.293.2
96.8
96.8
PRODUCT DATA | 39
Product Data
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AIR VELOCITY AND
TEMPERATURE DISTRIBUTION
Figure 36: LCN369HV Air Velocity and Temperature Distribution Charts.
Cooling
Discharge angle: Outer - 30°, Inner - 67°
Air velocity [ft/s]
Temperature [°F]
10.5 ft
6.6 ft
3.3 ft
9.8 ft
16.4 ft 13.1 ft 9.8 ft 6.6 ft 3.3ft 0 ft 3.3 ft 6.6 ft 9.8 ft 13.1 ft 16.4 ft
10.5 ft
6.6 ft
3.3 ft
9.8 ft
Heating
Discharge angle: Outer - 36°, Inner - 70°
Air velocity [ft/s]
Temperature [°F]
10.5 ft
6.6 ft
3.3 ft
9.8 ft
10.5 ft
6.6 ft
3.3 ft
9.8 ft
0 ft
16.4 ft 13.1 ft 9.8 ft 6.6 ft 3.3ft 0 ft 3.3 ft 6.6 ft 9.8 ft 13.1 ft 16.4 ft
0 ft
16.4 ft 13.1 ft 9.8 ft 6.6 ft 3.3ft 0 ft 3.3 ft 6.6 ft 9.8 ft 13.1 ft 16.4 ft
0 ft
16.4 ft 13.1 ft 9.8 ft 6.6 ft 3.3ft 0 ft 3.3 ft 6.6 ft 9.8 ft 13.1 ft 16.4 ft
0 ft
8.2 8.2
6.6 6.6
4.9 4.9
3.3 3.31.6
1.6
0.8 0.8
8.2
8.2
6.6 6.6
4.9 4.9
0.8 0.8
64.4
64.4
6868
71.6
71.6
75.2 75.2
86
1.6
1.6
3.3
3.3
86
82.4
82.4
78.8 78.8
Figure 37: LCN429HV, LCN489HV Air Velocity and Temperature Distribution Charts.
Cooling
Discharge angle: Outer - 30°, Inner - 67°
Air velocity [
/s]
Temperature [° ]
Heating
Discharge angle: Outer - 36°, Inner - 70°
Air velocity [
/s]
Temperature [° ]
ft ft ft ft ft 0 ft ft ft ft ft ft
ft ft ft ft ft 0 ft ft ft ft
ft ft
ft ft ft ft ft 0 ft ft ft ft ft ft
ft ft ft ft ft 0 ft ft ft ft ft ft
0 ft
0 ft
0 ft
0 ft
8.2
8.2
6.6
6.6
4.9
4.9
3.3
3.3
1.6 1.6
0.8 0.8
8.2
8.2
6.6
6.6
4.9
4.9
3.3
3.3
1.6
1.6
0.8
0.8
0.8
0.8
0.8 0.8
64.4 64.4
68
68
71.6
71.6
71.6
71.6
93.2
93.2
89.6
89.6
86
86
82.4
82.4 82.4
82.4
0
40 | PRODUCT DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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ACCESSORIES
• Actual inverter compressor speed
• Target inverter compressor speed
• Actual outdoor fan speed
• Target outdoor unit fan speed
• Actual superheat
• Target superheat
• Actual subcooler circuit superheat
• Target subcooler circuit superheat
• Main EEV position
• Subcooling EEV position
• Inverter compressor current transducer
value
• Outdoor air temperature
• Actual high pressure/saturation temperature
• Actual low pressure/saturation temperature
• Suction temperature
• Inverter compressor discharge temperature
• Constant speed compressor discharge
temperature
• Front outdoor coil pipe temperature
• Back outdoor coil pipe temperature
• Liquid line pipe temperature
• Subcooler inlet temperature
• Subcooler outlet temperature
• Average indoor unit (IDU) pipe temperature
• Inverter compressor operation indicator
light
• 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
• Target high pressure
• Target low pressure
• PCB (printed circuit board) version
• Software
version
• Installer
name
• Model no.
of outdoor units
• Site name
• Total number of connected indoor units
• Communication indicator lights
• Indoor unit capacity
• Indoor unit operating mode
• Indoor unit fan speed
• Indoor unit EEV position
• Indoor unit room temperature
• Indoor unit inlet pipe temperature
• Indoor unit outlet pipe temperature
• Indoor unit error code
LG Monitoring View (LGMV) Diagnostic Software and Cable
LGMV software allows the service technician or commissioning agent to connect a computer USB port
to the outdoor unit main printed circuit board (PCB) using an accessory cable without the need for a
separate interface device. The main screen for LGMV allows user to view the following real time data on
one screen:
Additional screens can be accessed by tabs on the main screen:
1. Cycleview: Graphic of internal components including:
2. Graph: Full screen graph of actual high and low pressures and high and low pressure limits. A
sliding bar enables user to go back in time and view data.
3. Control IDU: Enables user to turn on all IDU’s default setpoints of 86°F in heat mode or 64°F in
cool mode.
4. Setting: Converts metric values to imperial values.
5. Making Data: Recording of real time data to a separate file created to be stored on the user’s computer.
6. Loading Data: Recorded data from a saved “.CSV” file can be loaded to create an LGMV session.
7. Electrical Data: The lower half of main screen is changed to show the following:
Figure 38: Sample Cycleview.
• Compressors showing actual speeds
• EEVs
• Indoor
Units
• Liquid injection valves
• Temperature and pressure sensors
• Four-way reversing valve
• Outdoor fans showing status and speeds
• Inverter compressor
- Amps
- Volts
- Power Hz
- Inverter control board fan Hz
• Constant compressor
- Current transducer value
- Phase
• 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
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Sales Representative for more information.
In lieu of connecting to the outdoor unit, user has the option to connect to the indoor unit with the use of a USB to RS-485 connector kit.
When connected through the indoor unit, 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:
PRODUCT DATA | 41
Product Data
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ACCESSORIES
Contact your LG Sales Representative for system requirements, the latest version of SIMS,
how to download the app, or other information.
Figure 39: LG SIMS WLAN
Module.
LG Smart Inverter Monitoring System (SIMS)
SIMS can be used to display and graph operational data for single zone systems and respective
components (indoor unit and outdoor unit). SIMS also displays error codes and a troubleshooting guide.
SIMs consists of a hardware Wireless Local Area Network (WLAN) module, an interface cable, and a
free downloadable application (app) for iOS® or Android™. The user must supply either an Apple® or an
Android smart phone; SIMs is not optimized for tablets, and only be used with LG single zone and Multi F
systems.
Only trained HVAC service technicians familiar with variable refrigerant flow (VRF) systems in general
and with LG’s single zone and multi zone products can use SIMS. The technician must understand
inverter air conditioning operation cycles, the meaning of the data displayed by SIMS, and how to use
the data to troubleshoot the system.
iOS is a registered trademark of Cisco in the U.S. and other countries. Android is a trademark of Google Inc.
Apple is a trademark of Apple Inc., registered in the U.S. and other countries.
Table 24: Four-Way Ceiling-Cassette Accessories Overview.
Four-Way Ceiling-Cassette Accessories Overview
Model No. Description
ZLABGP04A
Low Ambient Wind Baffle for 18k and 24k Outdoor Units (One [1] Required),
36k, 42k and 48k Outdoor Units (Two [2] Required)
PT-QCHW0 / PT-UQC Ceiling Grilles for 2’ x 2’ Indoor Units
PTDCQ Decorative Cover for 2’ x 2’ Indoor Unit (Can Only Be Used with the PT-UQC Ceiling Grille)
PT-AAGW0 Ceiling Grilles for 3’ x 3’ Indoor Units
PTVK430 Outside Air Flange for All Capacities (Must comply with applicable codes for fire isolation dampers.)
PRARH1 Auxiliary Heat Relay Kit for All Capacities
PMNFP14A1 PI-485 for All Capacities
PAHCMR000 AHU Communication Kit for All Capacities
PWFMDD200 Wi-Fi Module for All Capacities
Cooling Capacity Data on page 43
Maximum Cooling Capacity Data on page 48
Heating Capacity Data on page 53
Maximum Heating Capacity Data on page 56
Equipment Selection Procedure on page 59
PERFORMANCE DATA
PERFORMANCE DATA | 43
Performance Data
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PERFORMANCE DATA
Cooling Capacity
Table 25: LCN188HV4 / LUU180HHV Cooling Capacities.
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
-4 17.70 12.52 0.83 18.80 13.22 0.86 19.89 12.80 0.90 20.69 13.07 0.91 22.09 13.18 0.92 23.19 13.43 0.94
-0.4 17.69 12.59 0.84 18.79 13.30 0.87 19.88 12.88 0.91 20.68 13.15 0.92 22.08 13.26 0.93 23.18 13.51 0.95
5 17.67 12.70 0.86 18.77 13.42 0.89 19.87 12.99 0.92 20.66 13.26 0.93 22.06 13.38 0.95 23.16 13.63 0.97
10 17.66 12.80 0.87 18.76 13.52 0.90 19.85 13.09 0.93 20.64 13.37 0.95 22.05 13.48 0.96 23.14 13.74 0.98
15 17.65 12.90 0.88 18.74 13.63 0.91 19.84 13.20 0.95 20.63 13.47 0.96 22.03 13.59 0.98 23.12 13.85 1.00
20 17.63 13.00 0.90 18.73 13.74 0.93 19.82 13.30 0.96 20.61 13.58 0.97 22.01 13.69 0.99 23.11 13.95 1.01
25 17.62 13.10 0.91 18.71 13.84 0.94 19.81 13.40 0.98 20.60 13.69 0.99 22.00 13.80 1.00 23.09 14.06 1.03
30 17.60 13.20 0.92 18.70 13.95 0.95 19.79 13.51 0.99 20.58 13.79 1.00 21.98 13.91 1.02 23.07 14.17 1.04
35 17.59 13.30 0.93 18.68 14.05 0.97 19.78 13.61 1.00 20.57 13.90 1.01 21.96 14.01 1.03 23.05 14.28 1.05
40 17.58 13.41 0.95 18.67 14.16 0.98 19.76 13.71 1.02 20.55 14.00 1.03 21.94 14.12 1.05 23.04 14.39 1.07
45 17.56 13.51 0.96 18.66 14.27 0.99 19.75 13.81 1.03 20.53 14.10 1.04 21.93 14.22 1.06 23.02 14.49 1.08
50 17.55 13.60 0.97 18.64 14.37 1.01 19.73 13.92 1.04 20.52 14.21 1.06 21.91 14.33 1.08 23.00 14.60 1.10
55 17.54 13.70 0.98 18.63 14.48 1.02 19.72 14.02 1.06 20.50 14.31 1.07 21.89 14.43 1.09 22.98 14.71 1.11
60 17.52 13.80 1.00 18.61 14.58 1.03 19.70 14.12 1.07 20.49 14.42 1.08 21.88 14.54 1.10 22.97 14.81 1.13
65 17.51 13.90 1.01 18.60 14.69 1.05 19.69 14.22 1.08 20.47 14.52 1.10 21.86 14.64 1.12 22.95 14.92 1.14
70 17.50 14.00 1.02 18.58 14.79 1.06 19.67 14.32 1.10 20.46 14.62 1.11 21.84 14.75 1.13 22.93 15.03 1.15
75 17.08 13.77 1.08 18.16 14.57 1.12 19.24 14.12 1.16 20.03 14.43 1.17 21.41 14.57 1.19 22.50 14.86 1.22
80 16.66 13.54 1.13 17.74 14.34 1.17 18.82 13.91 1.22 19.60 14.23 1.23 20.98 14.38 1.25 22.06 14.68 1.28
85 16.24 13.29 1.19 17.32 14.10 1.23 18.40 13.70 1.28 19.17 14.02 1.29 20.55 14.19 1.31 21.63 14.50 1.34
90 15.82 13.04 1.24 16.90 13.85 1.29 17.97 13.48 1.33
18.75 13.80 1.35 20.12 13.99 1.38 21.20 14.31 1.40
95 15.37 12.90 1.30 16.44 13.73 1.34 17.51 13.37 1.39 18.00 13.50 1.41 19.65 13.92 1.44 20.72 14.24 1.47
100 14.99 12.56 1.35 16.06 13.38 1.40 17.13 13.05 1.45 17.77 13.29 1.47 19.28 13.62 1.50 20.35 13.95 1.53
105 14.62 12.21 1.41 15.69 13.03 1.46 16.76 12.74 1.51 17.53 13.08 1.53 18.90 13.32 1.56 19.97 13.66 1.59
110 14.24 11.79 1.46 15.32 12.61 1.52 16.39 12.34 1.57 17.16 12.69 1.59 18.53 12.94 1.62 19.60 13.29 1.65
115 13.87 11.44 1.52 14.94 12.26 1.57 16.01 12.02 1.63 16.79 12.37 1.65 18.15 12.63 1.68 19.22 12.98 1.71
118 13.65 11.36 1.55 14.72 12.18 1.61 15.79 11.95 1.67 16.56 12.31 1.69 17.93 12.59 1.72 19.00 12.95 1.75
122 13.57 11.33 1.60 14.64 12.16 1.65 15.71 11.93 1.71 16.49 12.29 1.73 17.85 12.57 1.77 18.92 12.94 1.80
LC188HHV4
Cooling Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
44 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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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
-4 23.60 18.25 1.13 25.06 19.28 1.17 26.53 18.66 1.21 27.58 19.06 1.22 29.46 19.22 1.25 30.92 19.58 1.27
-0.4 23.58 18.35 1.14 25.05 19.39 1.18 26.51 18.77 1.22 27.57 19.17 1.24 29.44 19.33 1.26 30.91 19.70 1.29
5 23.56 18.51 1.16 25.03 19.56 1.20 26.49 18.94 1.24 27.55 19.34 1.26 29.42 19.50 1.28 30.88 19.87 1.31
10 23.55 18.66 1.18 25.01 19.71 1.22 26.47 19.09 1.26 27.53 19.49 1.28 29.39 19.65 1.30 30.86 20.03 1.33
15 23.53 18.81 1.19 24.99 19.87 1.24 26.45 19.24 1.28 27.50 19.64 1.30 29.37 19.81 1.32 30.83 20.18 1.35
20 23.51 18.96 1.21 24.97 20.02 1.25 26.43 19.39 1.30 27.48 19.80 1.31 29.35 19.96 1.34 30.81 20.34 1.37
25 23.49 19.10 1.23 24.95 20.18 1.27 26.41 19.54 1.32 27.46 19.95 1.33 29.33 20.12 1.36 30.79 20.50 1.39
30 23.47 19.25 1.24 24.93 20.33 1.29 26.39 19.69 1.34 27.44 20.10 1.35 29.30 20.27 1.38 30.76 20.66 1.40
35 23.46 19.40 1.26 24.91 20.49 1.31 26.37 19.84 1.35 27.42 20.26 1.37 29.28 20.43 1.40 30.74 20.81 1.42
40 23.44 19.54 1.28 24.89 20.64 1.32 26.35 19.99 1.37 27.40 20.41 1.39 29.26 20.58 1.41 30.72 20.97 1.44
45 23.42 19.69 1.29 24.87 20.80 1.34 26.33 20.14 1.39 27.38 20.56 1.41 29.24 20.73 1.43 30.69 21.13 1.46
50 23.40 19.83 1.31 24.85 20.95 1.36 26.31 20.29 1.41 27.36 20.71 1.43 29.21 20.89 1.45 30.67 21.28 1.48
55 23.38 19.98 1.33 24.84 21.10 1.38 26.29 20.43 1.43 27.34 20.86 1.44 29.19 21.04 1.47 30.64 21.44 1.50
60 23.37 20.12 1.35 24.82 21.26 1.40 26.27 20.58 1.45 27.32 21.02 1.46 29.17 21.19 1.49 30.62 21.59 1.52
65 23.35 20.27 1.36 24.80 21.41 1.41 26.25 20.73 1.46 27.29 21.17 1.48 29.15 21.35 1.51 30.60 21.75 1.54
70 23.33 20.41 1.38 24.78 21.56 1.43 26.23 20.88 1.48 27.27 21.32 1.50 29.13 21.50 1.53 30.57 21.91 1.56
75 22.77 20.08 1.46 24.21 21.24 1.51 25.66 20.59 1.56 26.70 21.03 1.58 28.55 21.24 1.61 29.99 21.66 1.64
80 22.21 19.73 1.53 23.65 20.90 1.59 25.09 20.28 1.64 26.13 20.74 1.66 27.97 20.97 1.69 29.42 21.40 1.73
85 21.65 19.37 1.60 23.09 20.55 1.66 24.53 19.97 1.72 25.57 20.44 1.74 27.40 20.69 1.78 28.84 21.13 1.81
90 21.09 19.01 1.68 22.53 20.19 1.74 23.96 19.65 1.80
25.00 20.12 1.82 26.83 20.40 1.86 28.27 20.86 1.90
95 20.49 18.81 1.75 21.92 20.01 1.82 23.35 19.50 1.88 24.00 19.68 1.91 26.20 20.29 1.94 27.63 20.77 1.98
100 19.99 18.30 1.83 21.42 19.50 1.89 22.85 19.03 1.96 23.69 19.38 1.99 25.70 19.85 2.02 27.13 20.34 2.06
105 19.49 17.80 1.90 20.92 19.00 1.97 22.35 18.57 2.04 23.38 19.07 2.07 25.20 19.42 2.11 26.63 19.91 2.15
110 18.99 17.19 1.98 20.42 18.38 2.05 21.85 17.99 2.12 22.88 18.50 2.15 24.70 18.86 2.19 26.13 19.37 2.23
115 18.49 16.68 2.05 19.92 17.87 2.13 21.35 17.52 2.20 22.38 18.03 2.23 24.20 18.41 2.27 25.63 18.93 2.32
118 18.19 16.56 2.10 19.62 17.76 2.17 21.05 17.43 2.25 22.08 17.95 2.28 23.90 18.35 2.32 25.33 18.88 2.37
122 18.10 16.52 2.16 19.52 17.72 2.23 20.95 17.40 2.32 21.98 17.92 2.34 23.81 18.33 2.39 25.23 18.86 2.43
Table 26: LCN249HV / LUU240HHV Cooling Capacities.
Cooling Capacity
PERFORMANCE DATA
LC249HHV
Cooling Capacity Table for LC249HHV (LCN249HV + LUU240HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
PERFORMANCE DATA | 45
Performance Data
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PERFORMANCE DATA
Cooling Capacity
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
-4 35.39 26.04 1.69 37.59 27.50 1.75 39.79 26.63 1.82 41.38 27.19 1.84 44.19 27.42 1.87 46.38 27.94 1.91
-0.4 35.37 26.19 1.71 37.57 27.66 1.77 39.77 26.79 1.84 41.35 27.35 1.86 44.16 27.58 1.89 46.36 28.10 1.93
5 35.34 26.42 1.74 37.54 27.91 1.80 39.73 27.02 1.87 41.32 27.59 1.89 44.12 27.82 1.92 46.32 28.35 1.96
10 35.32 26.63 1.76 37.51 28.13 1.83 39.70 27.24 1.90 41.29 27.81 1.92 44.09 28.04 1.95 46.28 28.57 1.99
15 35.29 26.84 1.79 37.48 28.35 1.86 39.67 27.45 1.92 41.26 28.03 1.95 44.06 28.26 1.98 46.25 28.80 2.02
20 35.26 27.05 1.82 37.45 28.57 1.88 39.64 27.66 1.95 41.23 28.25 1.97 44.02 28.49 2.01 46.21 29.02 2.05
25 35.24 27.26 1.84 37.43 28.79 1.91 39.61 27.88 1.98 41.19 28.47 2.00 43.99 28.71 2.04 46.18 29.25 2.08
30 35.21 27.47 1.87 37.40 29.01 1.94 39.58 28.09 2.01 41.16 28.68 2.03 43.96 28.93 2.07 46.14 29.47 2.11
35 35.18 27.67 1.89 37.37 29.23 1.96 39.55 28.31 2.03 41.13 28.90 2.06 43.92 29.15 2.10 46.11 29.70 2.14
40 35.16 27.88 1.92 37.34 29.45 1.99 39.52 28.52 2.06 41.10 29.12 2.08 43.89 29.37 2.12 46.07 29.92 2.17
45 35.13 28.09 1.94 37.31 29.67 2.02 39.49 28.73 2.09 41.07 29.34 2.11 43.86 29.58 2.15 46.04 30.14 2.20
50 35.10 28.30 1.97 37.28 29.89 2.04 39.46 28.94 2.12 41.04 29.55 2.14 43.82 29.80 2.18 46.00 30.37 2.22
55 35.08 28.51 2.00 37.25 30.11 2.07 39.43 29.16 2.14 41.01 29.77 2.17 43.79 30.02 2.21 45.97 30.59 2.25
60 35.05 28.71 2.02 37.23 30.33 2.10 39.40 29.37 2.17 40.97 29.99 2.20 43.76 30.24 2.24 45.93 30.81 2.28
65 35.02 28.92 2.05 37.20 30.55 2.12 39.37 29.58 2.20 40.94 30.20 2.22 43.72 30.46 2.27 45.90 31.03 2.31
70 34.99 29.13 2.07 37.17 30.77 2.15 39.34 29.79 2.23 40.91 30.42 2.25 43.69 30.67 2.29 45.86 31.26 2.34
75 34.15 28.65 2.18 36.32 30.30 2.26 38.49 29.37 2.35 40.05 30.01 2.37 42.82 30.30 2.42 44.99 30.90 2.47
80 33.31 28.16 2.30 35.47 29.82 2.38 37.64 28.94 2.47 39.20 29.60 2.50 41.96 29.92 2.54 44.12 30.54 2.59
85 32.48 27.64 2.41 34.63 29.32 2.50 36.79 28.49 2.59 38.35 29.16 2.62 41.10 29.52 2.67 43.26 30.15 2.72
90 31.64 27.12 2.52 33.79 28.81 2.61 35.94 28.03 2.71
37.50 28.71 2.74 40.25 29.10 2.79 42.40 29.76 2.85
95 30.74 26.84 2.63 32.88 28.55 2.73 35.02 27.82 2.83 36.00 28.08 2.86 39.30 28.95 2.91 41.44 29.63 2.97
100 29.99 26.12 2.74 32.13 27.83 2.84 34.27 27.15 2.95 35.53 27.65 2.98 38.55 28.32 3.04 40.69 29.02 3.10
105 29.24 25.40 2.86 31.38 27.11 2.96 33.52 26.49 3.07 35.07 27.21 3.10 37.80 27.70 3.16 39.94 28.41 3.22
110 28.49 24.53 2.97 30.63 26.23 3.08 32.77 25.67 3.19 34.32 26.40 3.22 37.05 26.92 3.28 39.20 27.64 3.35
115 27.74 23.80 3.08 29.88 25.49 3.19 32.02 24.99 3.31 33.57 25.72 3.35 36.31 26.27 3.41 38.45 27.01 3.48
118 27.29 23.62 3.15 29.43 25.34 3.26 31.57 24.87 3.38 33.12 25.61 3.42 35.86 26.18 3.48 38.00 26.93 3.55
122 27.14 23.56 3.24 29.28 25.29 3.35 31.43 24.82 3.48 32.97 25.57 3.52 35.71 26.15 3.58 37.85 26.91 3.65
Table 27: LCN369HV / LUU360HHV Cooling Capacities.
Cooling Capacity Table for LC369HHV (LCN369HV + LUU360HHV)
LC369HHV
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
46 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Cooling Capacity
PERFORMANCE DATA
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
-4 41.29 31.54 1.94 43.86 33.32 2.01 46.42 32.26 2.08 48.27 32.94 2.11 51.55 33.22 2.15 54.11 33.85 2.19
-0.4 41.27 31.73 1.96 43.83 33.52 2.03 46.40 32.45 2.11 48.25 33.14 2.13 51.52 33.42 2.17 54.08 34.05 2.22
5 41.24 32.00 1.99 43.80 33.81 2.07 46.36 32.74 2.14 48.21 33.42 2.17 51.48 33.71 2.21 54.04 34.34 2.25
10 41.20 32.26 2.02 43.76 34.08 2.10 46.32 33.00 2.17 48.17 33.69 2.20 51.44 33.98 2.24 54.00 34.62 2.28
15 41.17 32.51 2.05 43.73 34.35 2.13 46.29 33.26 2.21 48.13 33.96 2.23 51.40 34.24 2.27 53.96 34.89 2.32
20 41.14 32.77 2.08 43.70 34.62 2.16 46.25 33.52 2.24 48.10 34.22 2.26 51.36 34.51 2.31 53.92 35.16 2.35
25 41.11 33.02 2.11 43.66 34.88 2.19 46.22 33.78 2.27 48.06 34.49 2.29 51.32 34.78 2.34 53.88 35.44 2.38
30 41.08 33.28 2.14 43.63 35.15 2.22 46.18 34.04 2.30 48.02 34.75 2.33 51.28 35.04 2.37 53.83 35.71 2.42
35 41.05 33.53 2.17 43.60 35.42 2.25 46.15 34.29 2.33 47.99 35.02 2.36 51.24 35.31 2.40 53.79 35.98 2.45
40 41.02 33.78 2.20 43.56 35.68 2.28 46.11 34.55 2.36 47.95 35.28 2.39 51.20 35.58 2.44 53.75 36.25 2.48
45 40.98 34.03 2.23 43.53 35.95 2.31 46.07 34.81 2.40 47.91 35.54 2.42 51.17 35.84 2.47 53.71 36.52 2.52
50 40.95 34.28 2.26 43.50 36.22 2.34 46.04 35.07 2.43 47.88 35.81 2.45 51.13 36.11 2.50 53.67 36.79 2.55
55 40.92 34.54 2.29 43.46 36.48 2.37 46.00 35.32 2.46 47.84 36.07 2.49 51.09 36.37 2.53 53.63 37.06 2.58
60 40.89 34.79 2.32 43.43 36.75 2.40 45.97 35.58 2.49 47.80 36.33 2.52 51.05 36.64 2.57 53.59 37.33 2.62
65 40.86 35.04 2.35 43.40 37.01 2.43 45.93 35.84 2.52 47.77 36.59 2.55 51.01 36.90 2.60 53.55 37.60 2.65
70 40.83 35.29 2.38 43.36 37.28 2.46 45.90 36.09 2.55 47.73 36.85 2.58 50.97 37.16 2.63 53.50 37.87 2.68
75 39.84 34.71 2.51 42.37 36.71 2.60 44.90 35.59 2.69 46.73 36.36 2.72 49.96 36.71 2.77 52.49 37.44 2.83
80 38.86 34.11 2.63 41.39 36.13 2.73 43.91 35.07 2.83 45.73 35.86 2.86 48.95 36.25 2.92 51.48 37.00 2.97
85 37.89 33.49 2.76 40.41 35.52 2.86 42.92 34.52 2.97 44.74 35.33 3.00 47.96 35.76 3.06 50.47 36.53 3.12
90 36.91 32.86 2.89 39.43 34.90 3.00 41.94 33.96 3.10
43.75 34.79 3.14 46.96 35.26 3.20 49.47 36.05 3.26
95 35.86 32.51 3.02 38.36 34.59 3.13 40.85 33.70 3.24 42.00 34.02 3.28 45.85 35.07 3.34 48.35 35.90 3.41
100 34.98 31.64 3.15 37.48 33.72 3.26 39.98 32.90 3.38 41.46 33.49 3.42 44.98 34.32 3.48 47.47 35.16 3.55
105 34.11 30.77 3.27 36.61 32.85 3.39 39.11 32.10 3.52 40.91 32.97 3.56 44.10 33.56 3.63 46.60 34.42 3.70
110 33.24 29.72 3.40 35.74 31.78 3.53 38.23 31.10 3.66 40.04 31.98 3.70 43.23 32.61 3.77 45.73 33.48 3.84
115 32.37 28.83 3.53 34.86 30.89 3.66 37.36 30.28 3.79 39.17 31.17 3.84 42.36 31.83 3.91 44.86 32.72 3.99
118 31.84 28.62 3.61 34.34 30.70 3.74 36.84 30.13 3.88 38.64 31.03 3.92 41.83 31.72 3.99 44.33 32.63 4.07
122 31.67 28.55 3.71 34.16 30.64 3.85 36.66 30.07 3.99 38.47 30.98 4.03 41.66 31.68 4.11 44.16 32.60 4.19
Table 28: LCN429HV / LUU420HHV Cooling Capacities.
Cooling Capacity Table for LC429HHV (LCN429HV + LUU420HHV)
LC429HHV
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
PERFORMANCE DATA | 47
Performance Data
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Cooling Capacity
PERFORMANCE DATA
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
-4 47.19 34.27 2.27 50.12 36.20 2.35 53.05 35.05 2.44 55.17 35.79 2.47 58.91 36.09 2.52 61.84 36.78 2.57
-0.4 47.16 34.47 2.30 50.09 36.41 2.38 53.02 35.26 2.47 55.14 36.00 2.50 58.88 36.30 2.54 61.81 36.99 2.59
5 47.13 34.77 2.33 50.05 36.73 2.42 52.98 35.56 2.51 55.09 36.31 2.54 58.83 36.62 2.58 61.76 37.31 2.64
10 47.09 35.05 2.37 50.01 37.02 2.46 52.94 35.85 2.54 55.05 36.60 2.57 58.79 36.91 2.62 61.71 37.61 2.67
15 47.05 35.32 2.40 49.98 37.31 2.49 52.90 36.13 2.58 55.01 36.89 2.61 58.74 37.20 2.66 61.67 37.91 2.71
20 47.02 35.60 2.44 49.94 37.61 2.53 52.86 36.41 2.62 54.97 37.18 2.65 58.70 37.49 2.70 61.62 38.20 2.75
25 46.98 35.88 2.47 49.90 37.90 2.56 52.82 36.70 2.66 54.93 37.47 2.69 58.65 37.78 2.74 61.57 38.50 2.79
30 46.95 36.15 2.51 49.86 38.19 2.60 52.78 36.98 2.69 54.88 37.75 2.72 58.61 38.07 2.78 61.52 38.79 2.83
35 46.91 36.43 2.54 49.82 38.48 2.63 52.74 37.26 2.73 54.84 38.04 2.76 58.56 38.36 2.81 61.48 39.09 2.87
40 46.87 36.70 2.58 49.79 38.77 2.67 52.70 37.54 2.77 54.80 38.33 2.80 58.52 38.65 2.85 61.43 39.38 2.91
45 46.84 36.97 2.61 49.75 39.06 2.71 52.66 37.82 2.80 54.76 38.61 2.84 58.47 38.94 2.89 61.38 39.68 2.95
50 46.80 37.25 2.64 49.71 39.35 2.74 52.62 38.10 2.84 54.72 38.90 2.87 58.43 39.23 2.93 61.34 39.97 2.99
55 46.77 37.52 2.68 49.67 39.63 2.78 52.58 38.38 2.88 54.67 39.18 2.91 58.38 39.52 2.97 61.29 40.26 3.03
60 46.73 37.79 2.71 49.63 39.92 2.81 52.54 38.66 2.92 54.63 39.47 2.95 58.34 39.80 3.00 61.24 40.56 3.06
65 46.70 38.06 2.75 49.60 40.21 2.85 52.50 38.93 2.95 54.59 39.75 2.99 58.30 40.09 3.04 61.20 40.85 3.10
70 46.66 38.34 2.78 49.56 40.50 2.88 52.46 39.21 2.99 54.55 40.04 3.02 58.25 40.37 3.08 61.15 41.14 3.14
75 45.54 37.70 2.93 48.43 39.88 3.04 51.32 38.66 3.15 53.41 39.50 3.19 57.10 39.88 3.25 59.99 40.67 3.31
80 44.41 37.06 3.08 47.30 39.25 3.20 50.18 38.10 3.31 52.26 38.96 3.35 55.95 39.38 3.41 58.83 40.20 3.48
85 43.30 36.38 3.23 46.18 38.59 3.35 49.05 37.50 3.47 51.13 38.38 3.51 54.81 38.85 3.58 57.68 39.69 3.65
90 42.19 35.70 3.38 45.06 37.92 3.51 47.93 36.90 3.63
50.00 37.79 3.68 53.66 38.31 3.75 56.53 39.17 3.82
95 40.98 35.32 3.53 43.84 37.58 3.66 46.69 36.62 3.80 48.00 36.96 3.84 52.40 38.10 3.91 55.25 39.00 3.99
100 39.98 34.37 3.68 42.84 36.63 3.82 45.69 35.74 3.96 47.38 36.39 4.00 51.40 37.28 4.08 54.26 38.20 4.16
105 38.98 33.43 3.83 41.84 35.68 3.97 44.69 34.87 4.12 46.76 35.82 4.17 50.40 36.46 4.24 53.26 37.40 4.33
110 37.99 32.29 3.98 40.84 34.53 4.13 43.70 33.79 4.28 45.76 34.75 4.33 49.41 35.43 4.41 52.26 36.37 4.50
115 36.99 31.32 4.13 39.84 33.56 4.29 42.70 32.90 4.44 44.76 33.86 4.49 48.41 34.58 4.58 51.26 35.55 4.67
118 36.39 31.09 4.22 39.24 33.35 4.38 42.10 32.73 4.54 44.16 33.71 4.59 47.81 34.46 4.68 50.66 35.45 4.77
122 36.19 31.02 4.34 39.05 33.28 4.50 41.90 32.67 4.67 43.96 33.66 4.72 47.61 34.42 4.81 50.46 35.42 4.91
Table 29: LCN489HV / LUU480HHV Cooling Capacities.
Cooling Capacity Table for LC489HHV (LCN489HV + LUU480HHV)
LC489HHV
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
48 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Maximum Cooling Capacity
PERFORMANCE DATA
Table 30: LCN188HV4 / LUU180HHV Maximum Cooling Capacities.
LC188HHV4
Maximum Cooling Capacity Table for LC188HHV4 (LCN188HV4 +
LUU180HHV)
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
-4 24.38 16.10 1.69 25.90 17.00 1.75 27.41 16.46 1.81 28.50 16.81 1.83 30.44 16.95 1.87 31.95 17.27 1.90
-0.4 24.37 16.19 1.70 25.88 17.10 1.77 27.40 16.56 1.83 28.49 16.91 1.85 30.42 17.05 1.89 31.94 17.37 1.93
5 24.35 16.33 1.73 25.86 17.25 1.80 27.37 16.70 1.86 28.46 17.06 1.88 30.40 17.20 1.92 31.91 17.53 1.96
10 24.33 16.46 1.76 25.84 17.39 1.82 27.35 16.84 1.89 28.44 17.19 1.91 30.37 17.34 1.95 31.88 17.67 1.99
15 24.31 16.59 1.78 25.82 17.53 1.85 27.33 16.97 1.92 28.42 17.33 1.94 30.35 17.47 1.97 31.86 17.80 2.01
20 24.29 16.72 1.81 25.80 17.66 1.88 27.31 17.10 1.94 28.40 17.46 1.97 30.33 17.61 2.00 31.84 17.94 2.04
25 24.27 16.85 1.83 25.78 17.80 1.90 27.29 17.24 1.97 28.38 17.60 1.99 30.30 17.75 2.03 31.81 18.08 2.07
30 24.26 16.98 1.86 25.76 17.94 1.93 27.27 17.37 2.00 28.36 17.73 2.02 30.28 17.88 2.06 31.79 18.22 2.10
35 24.24 17.11 1.89 25.74 18.07 1.95 27.25 17.50 2.03 28.33 17.87 2.05 30.26 18.02 2.09 31.76 18.36 2.13
40 24.22 17.24 1.91 25.72 18.21 1.98 27.23 17.63 2.05 28.31 18.00 2.08 30.24 18.15 2.12 31.74 18.50 2.16
45 24.20 17.37 1.94 25.70 18.35 2.01 27.21 17.76 2.08 28.29 18.14 2.11 30.21 18.29 2.14 31.71 18.64 2.19
50 24.18 17.49 1.96 25.68 18.48 2.03 27.19 17.89 2.11 28.27 18.27 2.13 30.19 18.43 2.17 31.69 18.77 2.22
55 24.16 17.62 1.99 25.66 18.62 2.06 27.16 18.03 2.14 28.25 18.40 2.16 30.17 18.56 2.20 31.67 18.91 2.25
60 24.14 17.75 2.01 25.64 18.75 2.09 27.14 18.16 2.16 28.23 18.54 2.19 30.14 18.69 2.23 31.64 19.05 2.27
65 24.13 17.88 2.04 25.62 18.89 2.11 27.12 18.29 2.19 28.20 18.67 2.22 30.12 18.83 2.26 31.62 19.19 2.30
70 24.11 18.01 2.07 25.60 19.02 2.14 27.10 18.42 2.22 28.18 18.81 2.24 30.10 18.96 2.29 31.59 19.32 2.33
75 23.53 17.71 2.18 25.02 18.73 2.26 26.51 18.16 2.34 27.59 18.55 2.37 29.50 18.73 2.41 30.99 19.10 2.46
80 22.95 17.41 2.29 24.44 18.44 2.37 25.93 17.89 2.46 27.00 18.30 2.49 28.91 18.50 2.53 30.40 18.88 2.58
85 22.37 17.09 2.40 23.86 18.13 2.49 25.34 17.61 2.58 26.42 18.03 2.61 28.32 18.25 2.66 29.80 18.64 2.71
90 21.80 16.77 2.51 23.28 17.81 2.60 24.76 17.33 2.70
25.83 17.75 2.73 27.73 17.99 2.78 29.21 18.40 2.84
95 21.17 16.59 2.62 22.65 17.65 2.72 24.12 17.20 2.82 24.80 17.36 2.85 27.07 17.90 2.90 28.55 18.32 2.96
100 20.66 16.15 2.73 22.13 17.20 2.83 23.61 16.79 2.94 24.48 17.09 2.97 26.56 17.51 3.03 28.03 17.94 3.09
105 20.14 15.70 2.85 21.62 16.76 2.95 23.09 16.38 3.06 24.16 16.82 3.09 26.04 17.13 3.15 27.52 17.57 3.21
110 19.63 15.17 2.96 21.10 16.22 3.06 22.58 15.87 3.18 23.64 16.32 3.21 25.53 16.64 3.27 27.00 17.08 3.34
115 19.11 14.71 3.07 20.59 15.76 3.18 22.06 15.45 3.30 23.13 15.90 3.33 25.01 16.24 3.40 26.49 16.70 3.47
118 18.80 14.61 3.14 20.28 15.67 3.25 21.75 15.37 3.37 22.82 15.83 3.41 24.70 16.19 3.47 26.18 16.65 3.54
122 18.70 14.57 3.22 20.17 15.63 3.34 21.65 15.35 3.46 22.71 15.81 3.50 24.60 16.17 3.57 26.07 16.64 3.64
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
PERFORMANCE DATA | 49
Performance Data
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Maximum Cooling Capacity
PERFORMANCE DATA
Table 31: LCN249HV / LUU240HHV Maximum Cooling Capacities.
LC249HHV
Maximum Cooling Capacity Table for LC249HHV (LCN249HV + LUU240HHV)
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
-4 29.49 19.47 1.77 31.33 20.57 1.84 33.16 19.92 1.91 34.48 20.34 1.93 36.82 20.51 1.96 38.65 20.90 2.00
-0.4 29.48 19.59 1.79 31.31 20.69 1.86 33.14 20.03 1.93 34.46 20.45 1.95 36.80 20.63 1.99 38.63 21.02 2.03
5 29.45 19.76 1.82 31.28 20.87 1.89 33.11 20.21 1.96 34.43 20.63 1.98 36.77 20.81 2.02 38.60 21.20 2.06
10 29.43 19.91 1.85 31.26 21.04 1.92 33.09 20.37 1.99 34.41 20.80 2.01 36.74 20.97 2.05 38.57 21.37 2.09
15 29.41 20.07 1.88 31.24 21.20 1.95 33.06 20.53 2.02 34.38 20.96 2.04 36.71 21.14 2.08 38.54 21.54 2.12
20 29.39 20.23 1.90 31.21 21.37 1.97 33.04 20.69 2.05 34.35 21.12 2.07 36.69 21.30 2.11 38.51 21.71 2.15
25 29.36 20.38 1.93 31.19 21.53 2.00 33.01 20.85 2.07 34.33 21.29 2.10 36.66 21.47 2.14 38.48 21.87 2.18
30 29.34 20.54 1.96 31.16 21.70 2.03 32.99 21.01 2.10 34.30 21.45 2.13 36.63 21.63 2.17 38.45 22.04 2.21
35 29.32 20.70 1.99 31.14 21.86 2.06 32.96 21.17 2.13 34.28 21.61 2.16 36.60 21.80 2.20 38.42 22.21 2.24
40 29.30 20.85 2.01 31.12 22.03 2.09 32.94 21.33 2.16 34.25 21.78 2.19 36.57 21.96 2.23 38.39 22.38 2.27
45 29.27 21.01 2.04 31.09 22.19 2.11 32.91 21.49 2.19 34.22 21.94 2.22 36.55 22.13 2.26 38.36 22.54 2.30
50 29.25 21.16 2.07 31.07 22.36 2.14 32.89 21.65 2.22 34.20 22.10 2.25 36.52 22.29 2.29 38.34 22.71 2.33
55 29.23 21.32 2.09 31.04 22.52 2.17 32.86 21.81 2.25 34.17 22.26 2.27 36.49 22.45 2.32 38.31 22.88 2.36
60 29.21 21.47 2.12 31.02 22.68 2.20 32.83 21.96 2.28 34.14 22.43 2.30 36.46 22.61 2.35 38.28 23.04 2.39
65 29.18 21.63 2.15 31.00 22.85 2.23 32.81 22.12 2.31 34.12 22.59 2.33 36.43 22.78 2.38 38.25 23.21 2.42
70 29.16 21.78 2.17 30.97 23.01 2.25 32.78 22.28 2.34 34.09 22.75 2.36 36.41 22.94 2.41 38.22 23.37 2.46
75 28.46 21.42 2.29 30.27 22.66 2.38 32.07 21.97 2.46 33.38 22.45 2.49 35.69 22.66 2.54 37.49 23.11 2.59
80 27.76 21.06 2.41 29.56 22.30 2.50 31.36 21.65 2.59 32.66 22.14 2.62 34.97 22.38 2.67 36.77 22.84 2.72
85 27.06 20.67 2.53 28.86 21.93 2.62 30.66 21.31 2.71 31.96 21.81 2.75 34.25 22.07 2.80 36.05 22.55 2.85
90 26.37 20.28 2.64 28.16 21.54 2.74 29.95 20.96 2.84
31.25 21.47 2.87 33.54 21.77 2.93 35.33 22.26 2.99
95 25.61 20.07 2.76 27.40 21.35 2.86 29.18 20.80 2.97 30.00 21.00 3.00 32.75 21.65 3.06 34.53 22.16 3.12
100 24.99 19.53 2.88 26.77 20.81 2.98 28.56 20.31 3.09 29.61 20.67 3.13 32.13 21.18 3.19 33.91 21.70 3.25
105 24.37 18.99 3.00 26.15 20.27 3.10 27.93 19.81 3.22 29.22 20.35 3.25 31.50 20.72 3.32 33.29 21.25 3.38
110 23.74 18.35 3.11 25.53 19.62 3.23 27.31 19.20 3.34 28.60 19.74 3.38 30.88 20.13 3.45 32.66 20.67 3.52
115 23.12 17.80 3.23 24.90 19.07 3.35 26.69 18.69 3.47 27.98 19.24 3.51 30.26 19.65 3.58 32.04 20.20 3.65
118 22.74 17.67 3.30 24.53 18.95 3.42 26.31 18.60 3.55 27.60 19.15 3.59 29.88 19.58 3.65 31.67 20.14 3.73
122 22.62 17.62 3.39 24.40 18.91 3.52 26.19 18.56 3.65 27.48 19.12 3.69 29.76 19.56 3.76 31.54 20.12 3.83
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor
, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
50 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Maximum Cooling Capacity
PERFORMANCE DATA
Table 32: LCN369HV / LUU360HHV Maximum Cooling Capacities.
LC369HHV
Maximum Cooling Capacity Table for LC369HHV (LCN369HV + LUU360HHV)
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
-4 45.22 31.14 3.20 48.03 32.89 3.32 50.84 31.85 3.44 52.87 32.52 3.48 56.46 32.79 3.54 59.27 33.41 3.61
-0.4 45.20 31.32 3.24 48.01 33.08 3.35 50.81 32.03 3.48 52.84 32.71 3.52 56.43 32.98 3.58 59.24 33.61 3.65
5 45.16 31.59 3.29 47.97 33.37 3.41 50.77 32.31 3.53 52.80 32.99 3.57 56.38 33.27 3.64 59.19 33.90 3.71
10 45.13 31.84 3.34 47.93 33.64 3.46 50.73 32.57 3.59 52.76 33.26 3.63 56.34 33.54 3.69 59.14 34.17 3.77
15 45.09 32.09 3.39 47.89 33.90 3.51 50.69 32.83 3.64 52.72 33.52 3.68 56.30 33.80 3.75 59.10 34.44 3.82
20 45.06 32.34 3.43 47.86 34.17 3.56 50.66 33.08 3.69 52.68 33.78 3.73 56.25 34.06 3.80 59.05 34.71 3.88
25 45.02 32.59 3.48 47.82 34.43 3.61 50.62 33.34 3.74 52.64 34.04 3.78 56.21 34.33 3.86 59.01 34.98 3.93
30 44.99 32.84 3.53 47.78 34.70 3.66 50.58 33.60 3.79 52.60 34.30 3.84 56.17 34.59 3.91 58.96 35.25 3.99
35 44.96 33.09 3.58 47.75 34.96 3.71 50.54 33.85 3.85 52.56 34.56 3.89 56.12 34.85 3.96 58.92 35.51 4.04
40 44.92 33.34 3.63 47.71 35.22 3.76 50.50 34.11 3.90 52.52 34.82 3.94 56.08 35.12 4.02 58.87 35.78 4.10
45 44.89 33.59 3.68 47.68 35.49 3.81 50.46 34.36 3.95 52.48 35.08 4.00 56.04 35.38 4.07 58.83 36.05 4.15
50 44.85 33.84 3.73 47.64 35.75 3.86 50.42 34.61 4.00 52.44 35.34 4.05 56.00 35.64 4.13 58.78 36.32 4.21
55 44.82 34.09 3.77 47.60 36.01 3.91 50.39 34.87 4.06 52.40 35.60 4.10 55.95 35.90 4.18 58.74 36.58 4.26
60 44.78 34.34 3.82 47.57 36.27 3.96 50.35 35.12 4.11 52.36 35.86 4.15 55.91 36.16 4.23 58.69 36.85 4.32
65 44.75 34.58 3.87 47.53 36.53 4.01 50.31 35.37 4.16 52.32 36.12 4.21 55.87 36.42 4.29 58.65 37.11 4.37
70 44.72 34.83 3.92 47.49 36.79 4.06 50.27 35.63 4.21 52.28 36.38 4.26 55.82 36.68 4.34 58.60 37.38 4.43
75 43.64 34.26 4.13 46.41 36.23 4.28 49.18 35.12 4.44 51.18 35.89 4.49 54.72 36.24 4.57 57.49 36.95 4.67
80 42.56 33.67 4.34 45.33 35.66 4.50 48.09 34.61 4.67 50.09 35.40 4.72 53.62 35.78 4.81 56.38 36.52 4.91
85 41.50 33.06 4.56 44.25 35.06 4.72 47.01 34.07 4.89 49.00 34.87 4.95 52.52 35.30 5.04 55.28 36.06 5.14
90 40.43 32.43 4.77 43.18 34.45 4.94 45.93 33.52 5.12
47.92 34.34 5.18 51.43 34.80 5.28 54.18 35.59 5.38
95 39.27 32.09 4.98 42.01 34.14 5.16 44.74 33.27 5.35 46.00 33.58 5.41 50.22 34.62 5.51 52.95 35.43 5.62
100 38.32 31.23 5.19 41.05 33.28 5.38 43.79 32.47 5.58 45.40 33.06 5.64 49.26 33.87 5.75 52.00 34.70 5.86
105 37.36 30.37 5.40 40.10 32.42 5.60 42.83 31.68 5.80 44.81 32.54 5.87 48.30 33.13 5.98 51.04 33.98 6.10
110 36.40 29.34 5.61 39.14 31.37 5.82 41.88 30.70 6.03 43.85 31.57 6.10 47.35 32.19 6.21 50.08 33.05 6.34
115 35.45 28.46 5.82 38.18 30.49 6.04 40.92 29.89 6.26 42.90 30.76 6.33 46.39 31.42 6.45 49.13 32.29 6.58
118 34.87 28.25 5.95 37.61 30.30 6.17 40.35 29.74 6.39 42.32 30.63 6.47 45.82 31.31 6.59 48.55 32.21 6.72
122 34.68 28.18 6.12 37.42 30.24 6.34 40.15 29.68 6.58 42.13 30.58 6.65 45.63 31.28 6.78 48.36 32.18 6.91
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor
, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
PERFORMANCE DATA | 51
Performance Data
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Maximum Cooling Capacity
PERFORMANCE DATA
Table 33: LCN429HV / LUU420HHV Maximum Cooling Capacities.
LC429HHV
Maximum Cooling Capacity Table for LC429HHV (LCN429HV + LUU420HHV)
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
-4 48.17 34.08 3.25 51.17 36.00 3.37 54.16 34.85 3.50 56.32 35.59 3.54 60.14 35.89 3.60 63.13 36.57 3.67
-0.4 48.15 34.27 3.29 51.14 36.21 3.41 54.13 35.06 3.53 56.29 35.80 3.57 60.11 36.10 3.64 63.10 36.78 3.72
5 48.11 34.57 3.34 51.10 36.52 3.47 54.08 35.36 3.59 56.24 36.11 3.63 60.06 36.41 3.70 63.05 37.10 3.78
10 48.07 34.85 3.39 51.06 36.81 3.52 54.04 35.64 3.64 56.20 36.39 3.69 60.01 36.70 3.76 63.00 37.40 3.83
15 48.03 35.12 3.44 51.02 37.10 3.57 54.00 35.93 3.70 56.16 36.68 3.74 59.97 36.99 3.81 62.95 37.69 3.89
20 48.00 35.40 3.49 50.98 37.39 3.62 53.96 36.21 3.75 56.11 36.97 3.79 59.92 37.28 3.87 62.90 37.99 3.94
25 47.96 35.67 3.54 50.94 37.68 3.67 53.92 36.49 3.80 56.07 37.25 3.85 59.88 37.57 3.92 62.85 38.28 4.00
30 47.92 35.95 3.59 50.90 37.97 3.72 53.88 36.77 3.86 56.03 37.54 3.90 59.83 37.86 3.97 62.81 38.57 4.05
35 47.89 36.22 3.64 50.86 38.26 3.77 53.84 37.05 3.91 55.98 37.83 3.96 59.78 38.14 4.03 62.76 38.87 4.11
40 47.85 36.49 3.69 50.82 38.55 3.82 53.79 37.32 3.96 55.94 38.11 4.01 59.74 38.43 4.08 62.71 39.16 4.17
45 47.81 36.76 3.74 50.78 38.84 3.88 53.75 37.60 4.02 55.90 38.39 4.06 59.69 38.72 4.14 62.66 39.45 4.22
50 47.78 37.04 3.79 50.75 39.12 3.93 53.71 37.88 4.07 55.86 38.68 4.12 59.65 39.01 4.19 62.61 39.74 4.28
55 47.74 37.31 3.84 50.71 39.41 3.98 53.67 38.16 4.12 55.81 38.96 4.17 59.60 39.29 4.25 62.57 40.03 4.33
60 47.70 37.58 3.89 50.67 39.70 4.03 53.63 38.44 4.18 55.77 39.24 4.22 59.56 39.58 4.30 62.52 40.33 4.39
65 47.67 37.85 3.94 50.63 39.98 4.08 53.59 38.71 4.23 55.73 39.53 4.28 59.51 39.86 4.36 62.47 40.62 4.45
70 47.63 38.12 3.99 50.59 40.27 4.13 53.55 38.99 4.28 55.68 39.81 4.33 59.46 40.15 4.41 62.42 40.91 4.50
75 46.49 37.49 4.20 49.44 39.66 4.35 52.39 38.44 4.51 54.52 39.28 4.57 58.29 39.66 4.65 61.24 40.44 4.74
80 45.34 36.85 4.42 48.28 39.03 4.58 51.23 37.88 4.74 53.35 38.74 4.80 57.11 39.16 4.89 60.06 39.97 4.99
85 44.20 36.18 4.63 47.14 38.37 4.80 50.08 37.29 4.98 52.20 38.16 5.03 55.95 38.63 5.13 58.88 39.46 5.23
90 43.07 35.49 4.85 46.00 37.70 5.02 48.93 36.69 5.21
51.04 37.58 5.27 54.78 38.09 5.36 57.71 38.95 5.47
95 41.83 35.12 5.06 44.75 37.37 5.25 47.66 36.41 5.44 49.00 36.75 5.50 53.49 37.89 5.60 56.41 38.78 5.72
100 40.82 34.18 5.28 43.73 36.42 5.47 46.64 35.54 5.67 48.37 36.18 5.73 52.47 37.07 5.84 55.39 37.98 5.96
105 39.80 33.24 5.49 42.71 35.48 5.69 45.63 34.67 5.90 47.73 35.61 5.97 51.45 36.26 6.08 54.37 37.18 6.20
110 38.78 32.10 5.71 41.69 34.33 5.91 44.61 33.60 6.13 46.71 34.55 6.20 50.44 35.23 6.32 53.35 36.17 6.44
115 37.76 31.14 5.92 40.67 33.37 6.14 43.59 32.71 6.36 45.69 33.67 6.43 49.42 34.38 6.56 52.33 35.34 6.69
118 37.15 30.92 6.05 40.06 33.16 6.27 42.98 32.54 6.50 45.08 33.52 6.57 48.81 34.27 6.70 51.72 35.25 6.83
122 36.94 30.84 6.22 39.86 33.09 6.45 42.77 32.49 6.68 44.88 33.47 6.76 48.60 34.23 6.89 51.52 35.22 7.03
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor
, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
52 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Maximum Cooling Capacity
PERFORMANCE DATA
Table 34: LCN489HV / LUU480HHV Maximum Cooling Capacities.
LC489HHV
Maximum Cooling Capacity Table for LC489HHV (LCN489HV + LUU480HHV)
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
-4 52.11 37.84 3.44 55.34 39.97 3.57 58.58 38.70 3.70 60.92 39.52 3.74 65.05 39.85 3.81 68.29 40.61 3.89
-0.4 52.08 38.06 3.48 55.31 40.21 3.61 58.55 38.93 3.74 60.88 39.75 3.78 65.01 40.09 3.85 68.25 40.84 3.93
5 52.04 38.39 3.54 55.27 40.56 3.67 58.50 39.27 3.80 60.83 40.10 3.84 64.96 40.43 3.92 68.19 41.20 4.00
10 52.00 38.70 3.59 55.22 40.88 3.72 58.45 39.58 3.86 60.79 40.42 3.90 64.91 40.76 3.97 68.14 41.53 4.05
15 51.96 39.00 3.64 55.18 41.20 3.78 58.41 39.89 3.91 60.74 40.73 3.96 64.86 41.08 4.03 68.09 41.86 4.11
20 51.92 39.31 3.69 55.14 41.52 3.83 58.36 40.21 3.97 60.69 41.05 4.01 64.81 41.40 4.09 68.04 42.18 4.17
25 51.88 39.61 3.75 55.10 41.85 3.88 58.32 40.52 4.03 60.65 41.37 4.07 64.76 41.72 4.15 67.99 42.51 4.23
30 51.84 39.92 3.80 55.06 42.17 3.94 58.28 40.83 4.08 60.60 41.69 4.13 64.71 42.04 4.21 67.93 42.84 4.29
35 51.80 40.22 3.85 55.01 42.49 3.99 58.23 41.14 4.14 60.55 42.00 4.19 64.66 42.36 4.26 67.88 43.16 4.35
40 51.76 40.52 3.90 54.97 42.81 4.05 58.19 41.45 4.19 60.51 42.32 4.24 64.62 42.68 4.32 67.83 43.49 4.41
45 51.72 40.83 3.96 54.93 43.13 4.10 58.14 41.76 4.25 60.46 42.64 4.30 64.57 43.00 4.38 67.78 43.81 4.47
50 51.68 41.13 4.01 54.89 43.45 4.15 58.10 42.07 4.31 60.42 42.95 4.36 64.52 43.31 4.44 67.73 44.13 4.53
55 51.64 41.43 4.06 54.85 43.76 4.21 58.05 42.37 4.36 60.37 43.27 4.41 64.47 43.63 4.50 67.67 44.46 4.59
60 51.60 41.73 4.11 54.80 44.08 4.26 58.01 42.68 4.42 60.32 43.58 4.47 64.42 43.95 4.55 67.62 44.78 4.65
65 51.56 42.03 4.17 54.76 44.40 4.32 57.96 42.99 4.48 60.28 43.89 4.53 64.37 44.26 4.61 67.57 45.10 4.70
70 51.52 42.33 4.22 54.72 44.71 4.37 57.92 43.30 4.53 60.23 44.21 4.58 64.32 44.58 4.67 67.52 45.42 4.76
75 50.28 41.63 4.45 53.47 44.04 4.61 56.66 42.69 4.78 58.97 43.62 4.83 63.05 44.04 4.92 66.24 44.91 5.02
80 49.04 40.92 4.67 52.22 43.34 4.84 55.41 42.06 5.02 57.71 43.02 5.08 61.78 43.49 5.17 64.96 44.38 5.28
85 47.81 40.17 4.90 50.99 42.61 5.08 54.16 41.41 5.26 56.46 42.38 5.33 60.52 42.90 5.43 63.69 43.82 5.53
90 46.58 39.42 5.13 49.75 41.87 5.32 52.92 40.74 5.51
55.21 41.73 5.57 59.26 42.30 5.68 62.42 43.25 5.79
95 45.25 39.00 5.36 48.40 41.49 5.55 51.55 40.43 5.75 53.00 40.81 5.82 57.86 42.07 5.93 61.01 43.06 6.05
100 44.15 37.95 5.58 47.30 40.44 5.79 50.45 39.46 6.00 52.31 40.18 6.07 56.76 41.16 6.18 59.91 42.17 6.31
105 43.05 36.91 5.81 46.20 39.40 6.02 49.35 38.50 6.24 51.63 39.55 6.31 55.65 40.26 6.43 58.81 41.29 6.56
110 41.94 35.65 6.04 45.10 38.12 6.26 48.25 37.31 6.49 50.52 38.36 6.56 54.55 39.12 6.68 57.71 40.16 6.82
115 40.84 34.58 6.27 43.99 37.05 6.49 47.15 36.32 6.73 49.42 37.39 6.81 53.45 38.18 6.94 56.60 39.25 7.08
118 40.18 34.33 6.40 43.33 36.83 6.64 46.49 36.14 6.88 48.76 37.22 6.96 52.79 38.05 7.09 55.94 39.14 7.23
122 39.96 34.25 6.58 43.11 36.75 6.82 46.26 36.08 7.07 48.54 37.17 7.16 52.57 38.01 7.29 55.72 39.11 7.44
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
SHC: Sensible Capacity (kBtu/h) PI: Power Input (kW) (includes compressor
, indoor fan motor and
outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Cooling range can be extended from 5°F down to -4°F using the Low Ambient Wind Baffle Kit (sold
separately).
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
4. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
PERFORMANCE DATA | 53
Performance Data
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Table 35: LCN249HV / LUU240HHV Heating Capacities.
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
-13 -13.4 7.00 1.43 6.09 1.48 6.31 1.52 6.30 1.55 6.28 1.56 5.95 1.61
-4 -4.4 11.30 1.54 10.49 1.58 10.42 1.63 10.29 1.66 10.19 1.68 9.74 1.73
0 -0.4 13.29 1.58 12.51 1.63 12.31 1.68 12.14 1.71 12.00 1.73 11.49 1.78
5 4.5 15.65 1.64 14.92 1.69 14.56 1.74 14.33 1.77 14.14 1.79 13.57 1.84
10 9 17.23 1.69 16.53 1.74 16.07 1.80 15.80 1.83 15.57 1.85 14.96 1.90
17 15 18.97 1.76 18.31 1.81 17.73 1.87 17.41 1.90 17.15 1.92 16.49 1.98
20 19 20.02 1.80 19.38 1.86 18.74 1.92 18.39 1.95 18.11 1.98 17.42 2.03
25 23 21.79 1.85 21.14 1.91 20.41 1.97 20.02 2.00 19.71 2.03 18.97 2.09
30 28 23.57 1.90 22.84 1.97 22.05 2.03 21.65 2.06 21.33 2.09 20.54 2.15
35 32 25.35 1.95 24.54 2.01 23.71 2.08 23.28 2.11 22.94 2.14 22.11 2.20
40 36 26.64 2.00 25.89 2.06 25.07 2.13 24.63 2.16 24.29 2.19 23.41 2.26
45 41 28.26 2.05 27.58 2.12 26.77 2.19 26.32 2.23 25.97 2.26 25.02 2.32
47 43 28.90 2.07 28.26 2.14 27.45 2.21 27.00 2.25 26.64 2.28 25.67 2.35
50 46 28.99 2.06 28.40 2.12 27.70 2.18 27.30 2.22 26.98 2.24 26.07 2.30
55 51 29.13 2.04 28.65 2.09 28.12 2.14 27.79 2.16 27.54 2.18 26.72 2.23
60 56 29.27 2.02 28.89 2.06 28.53 2.09 28.29 2.11 28.09 2.12 27.38 2.16
63 59 29.35 2.01 29.03 2.04 28.78 2.07 28.59 2.08 28.43 2.09 27.77 2.11
68 64 29.44 1.99 29.18 2.02 29.04 2.04 28.89 2.05 28.77 2.05 28.17 2.07
PERFORMANCE DATA
Heating Capacity
Table 36: LCN188HV4 / LUU180HHV Heating Capacities.
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
-13 -13.4 7.63 1.15 6.85 1.18 6.95 1.22 6.90 1.24 6.86 1.25 6.52 1.29
-4 -4.4 10.24 1.23 9.56 1.27 9.46 1.30 9.34 1.33 9.24 1.34 8.84 1.38
0 -0.4 11.45 1.27 10.80 1.30 10.61 1.34 10.46 1.37 10.33 1.38 9.90 1.42
5 4.5 12.88 1.31 12.29 1.35 11.99 1.39 11.79 1.42 11.64 1.43 11.17 1.47
10 9 13.84 1.35 13.28 1.39 12.91 1.44 12.69 1.46 12.51 1.48 12.02 1.52
17 15 14.89 1.41 14.38 1.45 13.92 1.50 13.67 1.52 13.47 1.54 12.95 1.58
20 19 15.53 1.44 15.04 1.49 14.54 1.53 14.27 1.56 14.05 1.58 13.52 1.63
25 23 16.61 1.48 16.11 1.53 15.55 1.57 15.26 1.60 15.02 1.62 14.46 1.67
30 28 17.69 1.52 17.14 1.57 16.56 1.62 16.25 1.65 16.01 1.67 15.42 1.72
35 32 18.78 1.56 18.18 1.61 17.56 1.66 17.24 1.69 16.99 1.71 16.38 1.76
40 36 19.73 1.60 19.18 1.65 18.57 1.70 18.25 1.73 17.99 1.75 17.34 1.81
45 41 20.93 1.64 20.43 1.70 19.83 1.75 19.50 1.78 19.24 1.80 18.54 1.86
47 43 21.41 1.66 20.93 1.71 20.33 1.77 20.00 1.80 19.73 1.82 19.02 1.88
50 46 21.47 1.65 21.04 1.70 20.52 1.75 20.22 1.77 19.98 1.80 19.31 1.84
55 51 21.58 1.63 21.22 1.67 20.83 1.71 20.59 1.73 20.40 1.75 19.79 1.78
60 56 21.68 1.61 21.40 1.65 21.14 1.68 20.95 1.69 20.81 1.70 20.28 1.72
63 59 21.74 1.60 21.51 1.63 21.32 1.65 21.18 1.66 21.06 1.67 20.57 1.69
68 64 21.81 1.59 21.62 1.61 21.51 1.63 21.40 1.64 21.31 1.64 20.86 1.65
LC188HHV4, LC249HHV
Heating Capacity Table for LC188HHV4 (LCN188HV4 + LUU180HHV)
Heating Capacity Table for LC249HHV (LCN249HV + LUU240HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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).
54 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Table 37: LCN369HV / LUU360HHV Heating Capacities.
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
-13 -13.4 9.45 1.94 8.15 2.00 8.49 2.06 8.48 2.09 8.47 2.12 8.01 2.18
-4 -4.4 16.04 2.10 14.86 2.17 14.77 2.23 14.60 2.27 14.46 2.30 13.82 2.36
0 -0.4 19.08 2.17 17.96 2.24 17.67 2.31 17.42 2.35 17.22 2.38 16.50 2.45
5 4.5 22.70 2.26 21.64 2.33 21.12 2.40 20.78 2.44 20.51 2.48 19.68 2.55
10 9 25.12 2.34 24.10 2.42 23.43 2.49 23.03 2.53 22.71 2.57 21.81 2.64
17 15 27.78 2.45 26.82 2.53 25.97 2.61 25.50 2.65 25.12 2.68 24.16 2.76
20 19 29.40 2.52 28.46 2.60 27.51 2.68 27.00 2.73 26.59 2.76 25.58 2.85
25 23 32.10 2.59 31.15 2.68 30.06 2.76 29.50 2.81 29.04 2.84 27.95 2.93
30 28 34.83 2.68 33.75 2.77 32.59 2.86 31.99 2.91 31.51 2.94 30.36 3.03
35 32 37.55 2.75 36.36 2.84 35.12 2.93 34.49 2.98 33.98 3.02 32.76 3.11
40 36 39.47 2.83 38.36 2.92 37.14 3.01 36.49 3.06 35.98 3.10 34.68 3.20
45 41 41.86 2.91 40.86 3.01 39.66 3.11 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
PERFORMANCE DATA
Heating Capacity
Table 38: LCN429HV / LUU420HHV Heating Capacities.
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
-13 -13.4 7.17 1.96 5.79 2.01 6.30 2.07 6.36 2.11 6.40 2.13 5.99 2.19
-4 -4.4 16.06 2.14 14.78 2.21 14.76 2.28 14.60 2.31 14.47 2.34 13.81 2.41
0 -0.4 20.17 2.23 18.93 2.30 18.66 2.37 18.40 2.41 18.20 2.44 17.42 2.51
5 4.5 25.04 2.33 23.86 2.40 23.30 2.48 22.92 2.52 22.62 2.55 21.71 2.62
10 9 28.31 2.43 27.16 2.50 26.40 2.58 25.95 2.62 25.59 2.66 24.58 2.73
17 15 31.90 2.55 30.79 2.63 29.82 2.71 29.28 2.76 28.85 2.80 27.74 2.88
20 19 34.08 2.64 32.99 2.72 31.89 2.81 31.30 2.85 30.82 2.89 29.65 2.97
25 23 37.72 2.72 36.60 2.81 35.33 2.90 34.66 2.94 34.13 2.98 32.84 3.07
30 28 41.39 2.82 40.11 2.92 38.74 3.01 38.02 3.06 37.46 3.10 36.08 3.19
35 32 45.07 2.91 43.63 3.00 42.14 3.10 41.39 3.15 40.78 3.19 39.31 3.29
40 36 47.36 2.99 46.03 3.09 44.56 3.19 43.79 3.24 43.17 3.29 41.61 3.39
45 41 50.23 3.10 49.03 3.20 47.59 3.30 46.80 3.36 46.17 3.40 44.49 3.51
47 43 51.38 3.14 50.23 3.24 48.80 3.35 48.00 3.41 47.36 3.45 45.64 3.55
50 46 51.53 3.12 50.49 3.21 49.24 3.31 48.53 3.36 47.96 3.40 46.34 3.49
55 51 51.78 3.09 50.92 3.16 49.98 3.24 49.41 3.28 48.95 3.30 47.50 3.38
60 56 52.03 3.05 51.36 3.11 50.73 3.17 50.29 3.19 49.94 3.21 48.67 3.26
63 59 52.19 3.03 51.62 3.08 51.17 3.13 50.82 3.15 50.54 3.16 49.37 3.20
68 64 52.34 3.01 51.88 3.05 51.62 3.09 51.36 3.10 51.14 3.10 50.07 3.13
Heating Capacity Table for LC369HHV (LCN369HV + LUU360HHV)
LC369HHV, LC429HHV
Heating Capacity Table for LC429HHV (LCN429HV + LUU420HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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 | 55
Performance Data
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Table 39: LCN489HV / LUU480HHV Heating Capacities.
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
-13 -13.4 11.12 2.36 9.47 2.43 9.94 2.50 9.95 2.54 9.96 2.57 9.40 2.64
-4 -4.4 19.96 2.55 18.46 2.63 18.37 2.71 18.16 2.75 17.99 2.78 17.18 2.86
0 -0.4 24.04 2.63 22.61 2.72 22.26 2.80 21.95 2.84 21.70 2.88 20.78 2.96
5 4.5 28.89 2.74 27.54 2.82 26.88 2.91 26.45 2.96 26.10 2.99 25.05 3.08
10 9 32.14 2.83 30.84 2.92 29.98 3.01 29.46 3.06 29.05 3.10 27.91 3.19
17 15 35.71 2.96 34.47 3.05 33.38 3.15 32.78 3.20 32.30 3.24 31.05 3.34
20 19 37.88 3.04 36.67 3.14 35.45 3.24 34.79 3.29 34.26 3.34 32.96 3.43
25 23 41.50 3.13 40.27 3.23 38.87 3.33 38.14 3.39 37.55 3.43 36.14 3.53
30 28 45.16 3.23 43.77 3.34 42.26 3.44 41.49 3.50 40.87 3.55 39.36 3.65
35 32 48.82 3.32 47.27 3.43 45.66 3.53 44.84 3.59 44.18 3.64 42.58 3.75
40 36 51.31 3.40 49.87 3.51 48.28 3.63 47.44 3.69 46.77 3.74 45.08 3.85
45 41 54.42 3.51 53.12 3.62 51.55 3.74 50.70 3.80 50.01 3.86 48.20 3.97
47 43 55.66 3.55 54.42 3.67 52.86 3.78 52.00 3.85 51.31 3.90 49.44 4.02
50 46 55.83 3.53 54.70 3.63 53.35 3.74 52.57 3.79 51.95 3.84 50.20 3.94
55 51 56.10 3.49 55.17 3.58 54.15 3.66 53.53 3.70 53.03 3.74 51.46 3.82
60 56 56.37 3.45 55.64 3.52 54.95 3.58 54.48 3.61 54.11 3.63 52.72 3.69
63 59 56.53 3.43 55.92 3.49 55.44 3.54 55.06 3.56 54.75 3.57 53.48 3.61
68 64 56.70 3.41 56.20 3.45 55.92 3.49 55.63 3.50 55.41 3.51 54.25 3.54
Heating Capacity Table for LC489HHV (LCN489HV + LUU480HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
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
LC489HHV
56 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Maximum Heating Capacity
PERFORMANCE DATA
Table 40: LCN188HV4 / LUU180HHV Maximum Heating Capacities.
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
-13 -13.4 17.12 3.33 16.74 3.44 16.26 3.55 15.99 3.61 15.78 3.66 15.21 3.77
-4 -4.4 19.19 3.17 18.76 3.28 18.22 3.38 17.92 3.44 17.69 3.49 17.04 3.59
0 -0.4 20.17 3.13 19.72 3.23 19.16 3.34 18.85 3.40 18.60 3.44 17.92 3.55
5 4.5 21.41 3.08 20.93 3.18 20.33 3.28 20.00 3.34 19.73 3.39 19.02 3.49
10 9 22.56 3.11 22.05 3.21 21.42 3.31 21.07 3.37 20.79 3.41 20.04 3.52
17 15 24.08 3.13 23.55 3.23 22.87 3.33 22.50 3.39 22.20 3.44 21.39 3.54
20 19 24.27 3.02 23.73 3.12 23.05 3.22 22.67 3.28 22.37 3.32 21.56 3.42
25 23 24.45 2.92 23.91 3.01 23.22 3.11 22.84 3.16 22.54 3.21 21.72 3.30
30 28 24.68 2.79 24.13 2.88 23.44 2.97 23.06 3.02 22.75 3.06 21.92 3.16
35 32 24.86 2.68 24.31 2.77 23.61 2.86 23.23 2.91 22.92 2.95 22.09 3.04
40 36 25.05 2.58 24.49 2.66 23.79 2.75 23.40 2.80 23.09 2.84 22.25 2.92
45 41 25.28 2.45 24.71 2.53 24.01 2.61 23.61 2.66 23.30 2.69 22.45 2.77
47 43 25.37 2.40 24.80 2.48 24.09 2.56 23.70 2.60 23.39 2.64 22.53 2.71
50 46 25.44 2.38 24.93 2.45 24.31 2.52 23.96 2.56 23.68 2.59 22.88 2.66
55 51 25.57 2.36 25.14 2.42 24.68 2.47 24.40 2.50 24.17 2.52 23.45 2.58
60 56 25.69 2.33 25.36 2.38 25.05 2.42 24.83 2.44 24.66 2.45 24.03 2.49
63 59 25.77 2.32 25.49 2.35 25.27 2.39 25.09 2.40 24.95 2.41 24.37 2.44
68 64 25.84 2.30 25.61 2.33 25.49 2.36 25.36 2.36 25.25 2.37 24.72 2.39
Maximum Heating Capacity Table for LC188HHV4 (LCN188HV4 +
LUU180HHV)
LC188HHV4, LC249HHV
Table 41: LCN249HV / LUU240HHV Maximum Heating Capacities.
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
-13 -13.4 23.13 4.36 22.61 4.50 21.97 4.64 21.61 4.73 21.32 4.79 20.55 4.93
-4 -4.4 26.13 4.27 25.54 4.42 24.81 4.56 24.41 4.64 24.08 4.70 23.21 4.84
0 -0.4 27.36 4.22 26.75 4.36 25.98 4.50 25.56 4.58 25.22 4.64 24.30 4.78
5 4.5 28.90 4.15 28.26 4.29 27.45 4.42 27.00 4.50 26.64 4.56 25.67 4.70
10 9 29.68 4.04 29.02 4.18 28.19 4.31 27.73 4.38 27.36 4.44 26.37 4.58
17 15 30.72 3.97 30.03 4.10 29.18 4.23 28.70 4.30 28.32 4.36 27.29 4.49
20 19 31.38 3.90 30.68 4.03 29.80 4.16 29.31 4.23 28.92 4.29 27.87 4.41
25 23 32.04 3.83 31.32 3.96 30.43 4.09 29.93 4.16 29.53 4.21 28.46 4.34
30 28 32.86 3.75 32.12 3.87 31.21 4.00 30.70 4.07 30.29 4.12 29.19 4.25
35 32 33.52 3.69 32.77 3.81 31.83 3.93 31.31 4.00 30.89 4.05 29.77 4.17
40 36 34.17 3.62 33.41 3.74 32.46 3.86 31.93 3.93 31.50 3.98 30.36 4.10
45 41 35.00 3.54 34.21 3.65 33.24 3.77 32.69 3.84 32.26 3.89 31.09 4.00
47 43 35.32 3.50 34.53 3.62 33.55 3.74 33.00 3.80 32.56 3.85 31.38 3.97
50 46 35.43 3.48 34.71 3.59 33.85 3.69 33.36 3.75 32.97 3.79 31.86 3.89
55 51 35.60 3.45 35.01 3.53 34.36 3.61 33.97 3.66 33.65 3.69 32.66 3.77
60 56 35.77 3.41 35.31 3.47 34.87 3.54 34.58 3.56 34.34 3.59 33.46 3.64
63 59 35.88 3.39 35.49 3.44 35.18 3.49 34.94 3.51 34.75 3.52 33.94 3.57
68 64 35.98 3.36 35.67 3.41 35.49 3.45 35.31 3.46 35.16 3.46 34.43 3.49
Maximum Heating Capacity Table for LC249HHV (LCN249HV + LUU240HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
PERFORMANCE DATA | 57
Performance Data
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Table 42: LCN369HV / LUU360HHV Maximum Heating Capacities.
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
-13 -13.4 32.11 5.22 31.40 5.39 30.50 5.57 30.00 5.66 29.60 5.74 28.53 5.91
-4 -4.4 38.50 5.83 37.64 6.03 36.56 6.22 35.97 6.33 35.49 6.41 34.20 6.61
0 -0.4 40.42 5.97 39.51 6.17 38.39 6.37 37.76 6.48 37.26 6.56 35.90 6.76
5 4.5 42.82 6.14 41.86 6.34 40.66 6.55 40.00 6.66 39.47 6.75 38.03 6.95
10 9 43.60 5.84 42.62 6.03 41.41 6.23 40.73 6.33 40.19 6.42 38.73 6.61
17 15 44.64 5.62 43.64 5.81 42.39 6.00 41.70 6.10 41.15 6.18 39.65 6.37
20 19 45.29 5.44 44.28 5.62 43.02 5.80 42.31 5.90 41.75 5.98 40.23 6.16
25 23 45.95 5.26 44.93 5.43 43.64 5.60 42.93 5.70 42.36 5.78 40.82 5.95
30 28 46.77 5.03 45.73 5.19 44.42 5.36 43.70 5.45 43.12 5.52 41.55 5.69
35 32 47.43 4.84 46.37 5.00 45.05 5.16 44.31 5.25 43.72 5.32 42.13 5.48
40 36 48.09 4.66 47.01 4.81 45.67 4.96 44.93 5.05 44.33 5.12 42.72 5.27
45 41 48.91 4.43 47.82 4.57 46.45 4.72 45.69 4.80 45.09 4.87 43.45 5.01
47 43 49.24 4.33 48.14 4.48 46.76 4.62 46.00 4.70 45.39 4.76 43.74 4.91
50 46 49.38 4.31 48.39 4.44 47.19 4.56 46.51 4.63 45.96 4.69 44.41 4.81
55 51 49.63 4.26 48.80 4.37 47.90 4.47 47.35 4.52 46.91 4.56 45.52 4.66
60 56 49.87 4.22 49.22 4.30 48.61 4.38 48.20 4.41 47.86 4.43 46.64 4.50
63 59 50.01 4.19 49.47 4.26 49.04 4.32 48.70 4.34 48.43 4.36 47.31 4.41
68 64 50.16 4.16 49.72 4.21 49.47 4.26 49.22 4.28 49.01 4.28 47.99 4.32
Maximum Heating Capacity Table for LC369HHV (LCN369HV + LUU360HHV)
Table 43: LCN429HV / LUU420HHV Maximum Heating Capacities.
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
-13 -13.4 38.52 5.73 37.66 5.92 36.58 6.10 35.99 6.21 35.51 6.29 34.22 6.48
-4 -4.4 45.99 6.24 44.96 6.44 43.68 6.65 42.97 6.76 42.39 6.85 40.85 7.06
0 -0.4 48.39 6.29 47.31 6.50 45.95 6.71 45.20 6.82 44.60 6.92 42.98 7.12
5 4.5 51.38 6.36 50.23 6.57 48.80 6.78 48.00 6.90 47.36 6.99 45.64 7.20
10 9 52.62 6.19 51.44 6.40 49.97 6.60 49.16 6.71 48.50 6.81 46.74 7.01
17 15 54.27 6.07 53.06 6.27 51.54 6.47 50.70 6.58 50.03 6.67 48.21 6.87
20 19 55.33 5.96 54.09 6.16 52.54 6.36 51.69 6.47 51.00 6.56 49.14 6.75
25 23 56.38 5.86 55.12 6.06 53.55 6.25 52.67 6.36 51.97 6.44 50.08 6.64
30 28 57.70 5.73 56.41 5.92 54.80 6.11 53.90 6.22 53.19 6.30 51.25 6.49
35 32 58.76 5.63 57.44 5.82 55.80 6.00 54.89 6.11 54.16 6.19 52.19 6.38
40 36 59.81 5.53 58.47 5.71 56.80 5.89 55.88 6.00 55.13 6.08 53.13 6.26
45 41 61.13 5.40 59.76 5.58 58.06 5.76 57.11 5.86 56.35 5.94 54.30 6.11
47 43 61.66 5.35 60.28 5.52 58.56 5.70 57.60 5.80 56.83 5.88 54.77 6.06
50 46 61.84 5.31 60.59 5.47 59.09 5.63 58.23 5.72 57.55 5.78 55.61 5.94
55 51 62.14 5.26 61.11 5.39 59.98 5.52 59.29 5.58 58.74 5.63 57.00 5.75
60 56 62.44 5.20 61.63 5.30 60.87 5.40 60.35 5.44 59.93 5.47 58.40 5.56
63 59 62.62 5.17 61.94 5.25 61.41 5.33 60.98 5.36 60.65 5.38 59.24 5.44
68 64 62.80 5.13 62.25 5.20 61.94 5.26 61.63 5.28 61.37 5.29 60.09 5.33
Maximum Heating Capacity
PERFORMANCE DATA
LC369HHV, LC429HHV
Maximum Heating Capacity Table for LC429HHV (LCN429HV + LUU420HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
58 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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LC489HHV
Table 44: LCN489HV / LUU480HHV Maximum Heating Capacities.
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
-13 -13.4 38.51 5.68 37.65 5.87 36.57 6.06 35.98 6.17 35.50 6.25 34.21 6.44
-4 -4.4 46.82 6.19 45.77 6.39 44.46 6.60 43.74 6.71 43.15 6.80 41.59 7.01
0 -0.4 50.75 6.25 49.61 6.45 48.20 6.66 47.41 6.77 46.78 6.87 45.08 7.07
5 4.5 55.66 6.32 54.42 6.53 52.86 6.73 52.00 6.85 51.31 6.94 49.44 7.15
10 9 56.81 6.21 55.54 6.42 53.95 6.63 53.07 6.74 52.37 6.83 50.46 7.04
17 15 58.34 6.14 57.03 6.34 55.41 6.55 54.50 6.66 53.78 6.75 51.82 6.95
20 19 59.33 6.08 58.01 6.28 56.35 6.48 55.43 6.59 54.69 6.68 52.70 6.88
25 23 60.33 6.02 58.98 6.22 57.29 6.42 56.36 6.53 55.61 6.62 53.59 6.82
30 28 61.57 5.94 60.19 6.14 58.47 6.34 57.52 6.45 56.75 6.53 54.69 6.73
35 32 62.56 5.88 61.16 6.08 59.42 6.27 58.45 6.38 57.67 6.47 55.57 6.66
40 36 63.56 5.82 62.14 6.02 60.36 6.21 59.38 6.32 58.59 6.40 56.46 6.59
45 41 64.80 5.75 63.35 5.94 61.54 6.13 60.54 6.23 59.73 6.32 57.56 6.51
47 43 65.30 5.72 63.84 5.91 62.01 6.10 61.00 6.20 60.19 6.28 58.00 6.47
50 46 65.49 5.68 64.17 5.85 62.58 6.02 61.67 6.11 60.95 6.18 58.89 6.35
55 51 65.81 5.62 64.72 5.76 63.52 5.90 62.79 5.96 62.21 6.02 60.37 6.15
60 56 66.13 5.56 65.27 5.67 64.46 5.77 63.91 5.82 63.47 5.85 61.85 5.94
63 59 66.32 5.52 65.60 5.61 65.03 5.70 64.58 5.73 64.23 5.75 62.74 5.82
68 64 66.51 5.49 65.93 5.56 65.60 5.62 65.26 5.64 64.99 5.65 63.64 5.70
Maximum Heating Capacity Table for LC489HHV (LCN489HV + LUU480HHV)
DB: Dry Bulb Temperature (°F) WB: Wet Bulb Temperature (°F) TC: Total Capacity (kBtu/h)
PI: Power Input (kW) (includes compressor, indoor fan motor and outdoor fan motor)
1. All capacities are net, evaporator fan motor heat is deducted.
2. Direct interpolation is permissible.
Do not extrapolate.
3. Grey shading indicates reference data. When operating at this temperature, these values can be
different if the system is not running consistently.
Capacity as rated: 0 ft. above sea level with 24.6 ft. of refrigerant piping. 0 ft. level difference between
outdoor and indoor units.
Maximum capacity based on full-load (maximum) compressor operation rather than part-load operation
as published in rated capacity tables.
Maximum Heating Capacity
PERFORMANCE DATA
PERFORMANCE DATA | 59
Performance Data
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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,
determine 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 resultant is the NET cooling or heating capacity.
Refrigerant Line Length Derates
For air-cooled systems, a capacity correction factor will 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 45: WR%WXK&DSDFLW\&DVVHWWH6\VWHP&RROLQJDQG+HDWLQJ&DSDFLW\&RHI¿FLHQW)DFWRUV
EQUIPMENT SELECTION PROCEDURE
Piping Length (ft.) 16.4 24.6 32.8 49.2 65.6 82.0 98.4 114.8 131.2 147.6 164 180.4 196.9 213.3 229.7 246
Cooling Capacity Coefficient Factor.
Rate of Capacity
Change (%)
LC188HHV4 (18,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - - -
LC249HHV (24,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - - -
LC369HHV (36,000 Btu/h) 100 100 100 100 100 99.3 98.5 97.8 97.0 96.3 95.5 94.8 94.0 93.3 92.5 91.8
LC429HHV (42,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1
LC489HHV (48,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1
Heating Capacity Coefficient Factor.
Rate of Capacity
Change (%)”
LC188HHV4 (18,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - -
LC249HHV (24,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - -
LC369HHV (36,000 Btu/h) 100 100 100 100 100 99.3 98.5 97.8 97.0 96.3 95.5 94.8 94.0 93.3 92.5 91.8
LC429HHV (42,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1
LC489HHV (48,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1
Equivalent Piping Length for Piping Components
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
Table 46: 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
altitude correction factors must be applied.
60 | PERFORMANCE DATA
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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EQUIPMENT SELECTION PROCEDURE
Table 47: Outdoor Unit Frost Accumulation Factor (Heating)
1
.
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
1
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 will need to be adjusted for frost accumulation on air-cooled systems. If design day conditions are below
the dewpoint of the surrounding air, frost will not be a problem and no correction factor is needed. In certain weather conditions, however,
frost will 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 at right).
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 must 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 must 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 capacities (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.
Q
odu(rated)
(From capacity tables).
2. Outdoor Unit Capacity at Ti, To Temperature.
Q
odu(Ti, To)
(From capacity tables).
3. Outdoor Unit Capacity Coefficient Factor.
F
(Ti, To)
= Q
odu(Ti, To)
/ Q
odu(rated)
4. Piping Correction Factor (From Capacity Coefficient
Factor Tables).
F
(length)
for each piping length
5. Individual Indoor Unit Combination Capacity.
Q
idu (combi)
= Q
odu(rated)
x Q
idu(rated)
/ Q
idu(rated-total)
6. Individual Indoor Unit Actual Capacity.
Q
idu (actual)
= Q
odu(combi)
x F
(Ti, To)
x F
(length, altitude)
System Sizing Check Formulas
Conclusions and Recommendations
Placement Considerations on page 62
Installing Outdoor Units Indoors on page 70
Refrigerant Piping Design on page 73
APPLICATION
GUIDELINES
62 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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PLACEMENT CONSIDERATIONS
Indoor Unit
Do’s
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 impact operation. Maintain proper distances between
the indoor units and electric wires, audio and visual appliances,
breaker / circuit panels, etc.
• Place in an area that is level and with enough strength to bear the
weight of the indoor unit(s).
Do Not’s
• 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).
7KHXQLWVKRXOGQRWEHLQVWDOOHGZKHUHVXOIXULFDFLGDQGÀDPPDEOHRUFRUURVLYHJDVHVDUHJHQHUDWHGYHQWHGLQWRRUVWRUHG7KHUHLVULVNRI¿UH
explosion, and physical injury or death.
Selecting the Best Location for the Indoor Unit
WARNING
Figure 41: 2 x 2 Cassette Ceiling Opening Dimensions and Bolt
Locations.
Figure 42: 3 x 3 Cassette Ceiling Opening Dimensions and Bolt
Locations.
Figure 40: Indoor Unit Clearance Requirements.
“A”
19-11/16
or more
19 -11/16
or more
11 -13/16
or less
39-3/8
or more
Ceiling Cassette
Ceiling Board
13/32
or more
Ceiling beam or
other obstruction
Floor
Unit: Inch
Ceiling
WALL
“A” =
Ceiling Board
Any objects in room
(cabinets, furniture, etc.)
Below 36 kBtu: At least 70 - 7/8; no more than 11 ft., 9-23/32 in.
Over 36 kBtu: At least 70 - 7/8; no more than 13 ft., 9-11/32 in.
23-1/16 (585) ~ 26 (660) (Ceiling Opening)
23-1/16 (585) ~ 26 (660) (Ceiling Opening)
Panel Size: 27-9/16 (700) x 27-9/16 (700)
Unit: Inch (mm)
20-3/8 (517)
18-1/8 (461)
20-3/8 (517)
20-9/16 (523)
22-7/16
(570)
22-7/16
(570)
12-9/16
(319)
34-7/16 (875) (Ceiling Opening)
34-7/16 (875) (Ceiling Opening)
30-15/16 (787)
(Hanging Bolt)
26-15/16 (684)
Panel Size: 37-3/8 (950) x 37-3/8 (950)
Unit: Inch
(
mm
)
26-7/16 (671)
33-1/16 (840)
Unit Size
33-1/16 (840)
Unit Size
APPLICATION | 63
Application Guidelines
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Installing in a High or Dropped Ceiling
High or dropped ceilings, often found in commercial buildings and offices, will 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.
Ceiling Height Mode Selection
IHHW 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 Super High Ceiling
Table 48: Indoor Unit High Ceiling Mode Selection Options
(LCN188HV4).
Ceiling Height Mode Selection
IHHW 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 16-3/8 feet Super High Ceiling
Table 49: Indoor Unit High Ceiling Mode Selection Options (LCN249HV,
LCN369HV, LCN429HV, LCN489HV).
The unit will be damaged, will malfunction, and / or will not operate as designed if installed in any of the conditions listed.
• Indoor units (IDUs) should not be placed in an environment where the IDUs will be exposed to harmful volatile organic compounds (VOCs) or
in environments where there is improper air make up or supply or inadequate ventilation. If there are concerns about VOCs in the environment
where the IDUs are installed, proper air make up or supply and / or adequate ventilation should be provided. Additionally, in buildings where
IDUs will be exposed to VOCs consider a factory-applied epoxy coating to the fan coils for each IDU.
• 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.
Indoor Unit
PLACEMENT CONSIDERATIONS
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 will be exposed to unconditioned air (room will be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet will increase the temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
64 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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PLACEMENT CONSIDERATIONS
Selecting the Best Location for the Outdoor Unit
DANGER
• Do not install the unit in an area where combustible gas will generate, flow, stagnate, or leak. These conditions can cause a fire, resulting
in bodily injury or death.
• Do not install the unit in a location where acidic solution and spray (sulfur) are often used as it can cause bodily injury or death.
•
Do not use the unit in environments where oil, steam, or sulfuric gas are present as it can cause bodily injury or death.
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 will create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking,
leaking, and causing unsafe conditions from frozen condensate.
Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it. Vermin and unauthorized individuals will
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Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it. Vermin and unauthorized individuals will
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Select a location for installing the outdoor unit that will meet the following conditions:
• Where there is enough strength to bear the weight of the unit.
• 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 is within allowable limits.
• 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.
• If the outdoor unit is installed in a highly humid environment (near an ocean, lake, etc.), ensure that the site is well-ventilated and has a lot
of natural light (Example: Install on a rooftop).
Do Not’s
• Where it will be subjected to direct thermal radiation from other heat sources, or an area that would 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 high-frequency electrical noise / electromagnetic waves will affect operation.
• Where operating sound from the unit will disturb inhabitants of surrounding buildings.
• Where the unit will be exposed to direct, strong winds.
• Where the discharge of one outdoor unit will blow into the inlet side of an adjacent unit (when installing multiple outdoor units).
Planning for Snow and Ice
To ensure the outdoor unit operates properly, certain measures are required in locations where there is a possibility of heavy snowfall or
severe windchill or cold:
1. Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these are unusual phenomena.
2. Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall. If snow piles up and blocks the airflow, the
system will malfunction.
3. Remove any snow that has accumulated four (4) inches or more on the top of the outdoor unit.
4. In climates that will experience significant snow buildup, mount the outdoor unit on a raised, field-provided platform or stand. The raised
support platform must be high enough to allow the unit to remain above possible snow drifts, and must be higher than the maximum
anticipated snowfall for the location.
5. Design the mounting base to prevent snow accumulation on the platform in front or back of the unit frame.
6. Provide a field fabricated snow protection hood to keep snow and ice and/or drifting snow from accumulating on the coil surfaces.
7. To prevent snow and heavy rain from entering the outdoor unit, install the condenser air inlets and outlets facing away from direct winds.
8. Consider tie-down requirements in case of high winds or where required by local codes.
Outdoor Unit Condensate Drain Piping
Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See pages 67-69
for information in reference to outdoor unit placement.
Outdoor Unit
APPLICATION | 65
Application Guidelines
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PLACEMENT CONSIDERATIONS
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 will create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking,
leaking, and causing unsafe conditions from frozen condensate.
Planning for Snow and Ice, continued.
Tie-Downs and Lightning Protection
Tie-Downs
• The strength of the roof must be checked before installing the
outdoor units.
• If the installation site is prone to high winds or earthquakes, when
installing on the wall or roof, securely anchor the mounting base
using a field-provided tie-down configuration approved by a local
professional engineer.
• The overall tie-down configuration must be approved by a local
professional engineer.
Always refer to local code when using a wind restraint system.
Lightning Protection
• To protect the outdoor unit from lightning, it must be placed within
the specified lightning safety zone.
• Power cable and communication cable must be installed five (5) feet away from lightning rod.
• A high-resistance ground system must be included to protect against induced lightning or indirect strike.
Building Height (feet)
66 98 148 197
3URWHFWLRQ$QJOHÛ
55 45 35 25
If the building does not include lightning protection, the outdoor unit will be damaged from a lightning strike. Inform the customer of this possibility in
advance.
Figure 43: Typical Arrangement of Single Zone Refrigerant Pipe and
Cable(s) in a Utility Conduit.
Ground
Safe zone
Lightning rod
3URWHFWLRQ$QJOHÛaÛ
5 feet
Lightning rod
Underground Refrigerant Piping
Refrigerant pipe installed underground must 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 44: Lightning Protection Diagram.
Table 50: Utility Conduit Sizes (Inches).
Table 51: Outdoor Unit Refrigerant Pipe Connections.
Model
Liquid Conn.
(inches)
Vapor Conn.
(inches)
LC188HHV4 3/8 5/8
LC249HHV, LC369HHV, LC429HHV,
LC489HHV
3/8 5/8
Table 52: 6DIHW\=RQH6SHFL¿FDWLRQV
Outdoor Unit
1
OD pipe diameter in inches; Values in parenthesis () indicate OD of pipe with insulation jacket.
2
Diameter of pipe with insulation. Thickness of pipe insulation is typical. Actual required thickness will
vary based on surrounding ambient conditions and must be calculated and specified by the design
engineer.
3
Insulation thickness (value in parenthesis) = 3/8 inch.
4
Insulation thickness (value in parenthesis) = 1 inch.
5
Insulation thickness (value in parenthesis) = 3/4 inch.
Liquid Pipe
1
Vapor Pipe
1
3/8 (2.0
2,5
) 1/2 (2.0
2,5
) 5/8 (2-1/8
2,5
) 3/4 (2-1/4
2,5
)
1/4 (1.0)
3
4444
3/8 (1-1/8)
3
4445
1/2 (1-1/2)
4
5555
5/8 (1-5/8)
4
5555
3/4 (1-3/4)
4
5555
Vapor Line
Liquid Line
Min. 14 Gauge
Cable
Power/Communication
Pi
p
e Sleeve
Insulation Material
Insulation
Material
66 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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• Avoid installing the outdoor unit where it would be directly
exposed to ocean winds.
• Install the outdoor unit on the side of the building opposite from
direct ocean winds.
• Select a location with good drainage.
• Periodically clean dust or salt particles off of the heat exchanger
with water.
• If the outdoor unit must be placed in a location where it would
be subjected to direct ocean winds, install a concrete windbreak
strong enough to block any winds.
• Windbreak must be more than 150% of the outdoor unit’s height.
There must be 2 to 3-1/2 inches of clearance between the outdoor
unit and the windbreaker for purposes of air flow.
Additional anti-corrosion treatment will need to be applied to the outdoor
unit at oceanside locations.
Ocean winds will cause corrosion, particularly on the condenser and
HYDSRUDWRU¿QVZKLFKLQWXUQFRXOGFDXVHSURGXFWPDOIXQFWLRQRU
LQHI¿FLHQWSHUIRUPDQFH
Figure 45: Oceanside Placement Using Windbreak.
Figure 46: Placement Using Building as Shield.
Oceanside Applications
Use of a Windbreak to Shield from Sea Wind
Sea wind
Windbreak
Use of a Building to Shield from Sea Wind
If a windbreak is not possible, a building or larger structure must be
used to shield the outdoor unit from direct exposure to the sea wind.
The unit must be placed on the side of the building directly opposite
to the direction of the wind as shown in the figure at right.
Sea wind
Sea wind
Building
Building
PLACEMENT CONSIDERATIONS
Outdoor Unit
APPLICATION | 67
Application Guidelines
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Outdoor Unit
PLACEMENT CONSIDERATIONS
Outdoor Unit (18,000 and 24,000 Capacity) Service Access and Allowable Clearances
Specific clearance requirements in the diagram below are for 18,000 and 24,000 Btu/h capacities. The figure below shows the overall
minimum clearances 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 the figure below for
minimum spacing. When installing multiple outdoor units, see Cases 4 and 5 for correct spacing requirements.
Figure 47: 18,000 and 24,000 Capacity Outdoor Unit Service Access and Allowable Clearances Diagram.
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 53: 18,000 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 below and 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.)
A
B
D
G
C
G
C
D
E
D
D
B
B
F
1/16 inch
20 inches or less
Case 1
Case 4
Case 2 Case 3
Case 5
20 inches or less
68 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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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
Minimum 27-9/16
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 to 48,000 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 11-13/16"
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.
APPLICATION | 69
Application Guidelines
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PLACEMENT CONSIDERATIONS
Minimum 19-11/16
"
Obstacle just on the
air discharge side.
Where there are obstacles on both suction
and discharge sides (discharge side obstacle
is higher than the outdoor unit).
Minimum 19-11/16"
Minimum 11-13/16
"
Where there are obstacles above, and on both
suction and discharge sides (discharge side obstacle
is higher than the outdoor unit).
Maximum 19-11/16"
Minimum 11-13/16"
Minimum 39-3/8"
L
H
A
Table 54: 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.
LA
/+
/+ 29-1/32 inches
1/2 H < L 39-3/8 inches
H < L
6HW6WDQGDV/+
L
Minimum 39-3/8"
Minimum 39-3/8"
Maximum 19-11/16"
Minimum 11-13/16"
Where there are obstacles above, and on both
suction and discharge sides (discharge side obstacle
is lower than the outdoor unit).
H
³/´VKRXOGEHORZHUWKDQ
³+´,IDVWDQGLVQHFHV-
sary, it should be con-
tained (not open frame) to
prevent the discharge air
from short cycling.
Minimum 19-11/16"
Minimum 19-11/16
"
Minimum 39-3/8"
Obstacles above and on the
air discharge side.
Where there are obstacles on both suction
and discharge sides (discharge side obstacle
is lower than the outdoor unit).
Minimum 19-11/16"
Minimum 11-13/16"
Minimum 11-13/16"
Minimum 78-3/4
"
Minimum 23-19/32"
Minimum 39-3/8"
Series installation
Outdoor Unit
70 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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PLACEMENT CONSIDERATIONS
Installing Outdoor Units Indoors
Single Zone Cassette outdoor units are engineered to be mounted outdoors and include technology designed to minimize the negative
effects of winter weather’s freezing rain, sleet, and snow. Some building projects, however, necessitate placing the HVAC outdoor units
indoors:
• Lack of ground space.
• Lack of an appropriate outdoor location that meets system design requirements.
• When mounting on the roof is not an option due to a lack of roof space.
• Roof warranty will be voided if mechanical equipment is placed on the membrane.
• On retrofit projects, a former chiller / boiler / air handler equipment room, mechanical area, or penthouse already exists.
• To curtail the potential need for redundant zone heating devices such as wall-fin radiators or duct heaters.
• In extremely cold environments where there is a significant amount of run-time at temperatures well below freezing outside the outdoor unit
ambient air temperature range published in this engineering manual.
Benefits of Installing Outdoor Units Indoors
• Shelters the outdoor unit from direct exposure to prevailing winds that decrease the heating capability of the outdoor unit.
• Protects equipment from freezing precipitation and / or potential ice build-up that could hinder unit operation.
• Maintains coil heat transfer efficiency by reducing the number of and shortening the cycle time for defrost operation.
• Easier maintenance and servicing during inclement weather.
• When mounted in a fully enclosed space, limiting the ambient air temperature will allow the Single Zone Cassette system designer to elimi-
nate oversizing.
• The outdoor unit to compensate for loss of capacity at low ambient temperatures.
• Will also curtail the need to provide inefficient redundant zone heating devices such as wall-fin radiators and second-stage ancillary heating
devices.
Design Considerations Include:
• Enclosure types and elements such as louvers (see next page), rain hoods, dampers and controls, heating methods and sizing of heating
devices.
• Heating strategies.
• Duct design.
• Condensate handling.
General Guidelines
• Follow ASHRAE 62.1 design guidelines.
• Depending on the project / application, a roof over the outdoor units in combination with a wind break will be all that is necessary.
• Consider the potential for snow accumulation near louvers / roof openings. Outside air intakes and discharge ducts/louvers must be engi-
neered to clear anticipated snow accumulation levels by at least one (1) foot.
• In situations where operation is anticipated at temperatures lower than the product’s minimum operating temperature, ancillary heat must
be provided to heat the outdoor unit coils to ensure continuous compressor operation and heating.
It will be necessary to use a field-fabricated air guide to prevent discharge air from short-cycling back to the coil inlet.
• Consider the direction of prevailing winds and opening placement. If possible, locate inlet openings upwind of discharge openings and other
exhaust outlets.
• When inlet and outlet openings are placed on the same wall, minimum distance between the two openings must be approximately three (3)
feet (minimum distance varies significantly with variations in outlet opening face velocity).
• If roof-mounted ventilation openings are used, strategically locate the inlet ventilation opening(s) upwind of the outlet opening(s).
• Discharge and supply ductwork must be designed to avoid weather related long periods of water entrainment and the potential for microbial
growth.
Installing Outdoor Units Indoors
APPLICATION | 71
Application Guidelines
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1. Outdoor Unit Enclosure: Manual Door Open Type.
2. Louver Angle: No More Than 15° Horizontally.
3. Space Between Louvers: More than 4 inches (Recommend).
4. Louver Shape: Wing or Plane Type.
Inside
Outside
Air flow passing through
the louver blade backwards
can generate noise.
In
side
Maximum 15°
(Recommended)
More than 4 in.
(Recommended)
Louver
• Open Rate and Inlet must be taken into consideration when design-
ing the louvered outdoor unit enclosure.
• 'RQRWXVH³6´W\SHORXYHUV
If the Louver Open Rate is Too Small
1. Noise can occur because of the increased air velocity passing
through the louver blade.
2. Noise can occur from louver blade vibrations.
3. A drop in outdoor unit fan performance (excess static pressure
can cause a drop in outdoor unit performance and heat exchanger
efficiency).
4. If the louver open rate is too small or there is insufficient air flow
exchange, the air conditioner might stop operating.
Figure 48: Louver Recommendations.
Figure 49: Using “S” Type Louvers.
Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet
louver enclosed area.
• Install a field-provided drain pan under the outdoor units and provide a path to a nearby floor drain.
• If the ambient air temperature is expected to drop below 32°F in the enclosure, heat the bottom surface of the pan, drain line, and floor
drain so that the condensate does not freeze before reaching the drain.
Louver Recommendations for Outdoor Unit Enclosure
Allow for ventilation intake and exhaust air based on maximum outdoor unit fan capacity.
• Select the size, type and orientation of architectural louvers with adequate “net free area” face velocity to ensure the total external static
pressure from the outdoor unit fan does not exceed design limitations (see specification data tables).
• No obstructions must be placed in front of the louver that could hamper the free flow (throw) of air.
• Roof top openings and / or discharge and supply louvers must be equipped with screens to prevent bird and insect infiltration.
For louver recommendations, see below and on the next page.
As always, the best solution for each project balances acceptable heating performance (considering local weather conditions), capital costs,
life cycle energy consumption, and limitations set forth by local building codes.
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 side-
walks or driveways which will create unsafe conditions.
CAUTION
PLACEMENT CONSIDERATIONS
Installing Outdoor Units Indoors
72 | APPLICATION
Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual
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Formula
• Total Louver Dimension (Excluding Frame) (A) = 3.9 feet x 6.2 feet = 24.2 ft.
2
• Area Blocked by Outdoor Unit (Discharge) (B) = 2.6 feet x 2.8 feet = 7.41 ft.
2
• Inlet Louver Dimension (A - B) = 16.8 ft.
2
• Equivalent Inlet Dimension (Open Rate 80%) = 16.8 ft.
2
x 0.8 = 13.44 ft.
2
• Equivalent Inlet Airflow = 13.44 ft.
2
x 8.2 ft./s x 60 sec./min. = 6,612 ft.
3
/min.
• Equivalent Inlet Airflow / Discharge Airflow = 6,612 ft.
3
/min. / 2,119 ft.
3
/min. = 312% (Within Allowable Limits)
Confirming Air Flow Rate / Total Opening Rate
• Example: LSU180HSV5.
• Discharge Airflow Rate: 2,119 ft.
3
/min.
• Velocity of Outlet Air: 16.4 ft./s
• Velocity of Inlet Air: 8.2 ft./s
• Open Rate = 80% or More
• Inlet airflow must match or exceed discharge airflow.
• Separate inlet airflow from discharge airflow to
prevent recirculation.
Figure 50: Open Rate by Louver Radian Formula.
Open Rate = Effective Face Area (Af)
Total Face Area (A)
Side View
ho = h * COS
Total Area (A) = H * W
Number of Open Spaces (N) = (Number of Louvers - 1)
Effective Area (Af) = ho * W * N
Louver Open Rate (n) = Af / A
Af = A * n
Effective Cross Section Area
ho
h
W
Front View
H
Open Rate by Louver Radian
Figure 51: Example of Installing Outdoor Unit Indoors.
PLACEMENT CONSIDERATIONS
Installing Outdoor Units Indoors
55-1/8
47-1/4
34-1/4
74-13/16
31-1/2
Unit: Inch
Louver Dimensions Air Guide Duct on
Outdoor Unit
Outdoor Unit
Dimensions
APPLICATION | 73
Application Guidelines
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REFRIGERANT PIPING DESIGN
Device Connection Limitations
A single-zone system consists of one outdoor unit and one indoor unit. One of the most critical elements of a single-zone system is the
refrigerant piping. If the connection piping is not within allowable limits, there will be reliability, performance, noise, and vibration issues.
The table below lists pipe length limits that must be followed in the design of a Single Zone LGRED Four-Way Ceiling-Cassette refrigerant
pipe system. See paragraph below for calculating additional refrigerant charge necessary for longer piping lengths. Refer to the figures for
maximum length and elevation of piping.
Table 55: Single-Zone Four-Way LGRED Ceiling Cassette
Refrigerant Piping System Limitations.
System Model Name
LC188HHV4, LC249HHV LC369HHV, LC429HHV, LC489HHV
Pipe Sizes
Vapor
5/8 5/8
Liquid
3/8 3/8
Pipe Length
(ELF = Equivalent
Length of Pipe)
Standard length (no add’l refrigerant)
24.9 feet 24.9 feet
Longest total equivalent piping length
164 feet 246 feet
Shortest total equivalent piping length
16.4 16.4
Distance between fittings and indoor or
outdoor units
LQFKHV LQFKHV
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
98.4 feet 98.4 feet
If outdoor unit is below indoor unit
98.4 feet 98.4 feet
Additional Refrigerant Needed (oz/ft)
0.43 0.43
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
98
98
164
Max Length = A
Max Elevation = B
164
Unit = Feet
Figure 52: Typical LC188HHV4 and LC249HHV System Layout.
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
98
98
246
Max Length = A
Max Elevation = B
246
Unit = Feet
Figure 53: Typical LC369HHV, LC429HHV, and LC489HHV System
Layout.
Additional Refrigerant Charge
Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a standard 24.9 foot line. Any time a line set is used
longer then the standard 24.9 foot line set length, the refrigerant charge has to be adjusted.
The charge must be adjusted on 0.43 oz. of R410A per foot based on how many feet of piping are added. The factory charge
accommodates pipe lengths up to the standard length without requiring refrigerant removal.
Example:
A 50 foot line set is used -- 25.1 additional feet x 0.43 oz. per foot. = Add 10.79 oz. of R410A.
If the unit charge is unknown, reclaim, evacuate and weigh in the correct charge using the unit nameplate (capacity) charge adjusting for line sets
longer than 24.9 ft. This will prevent any interruptions to the functioning of the unit and possible damage.
New Issue: EM_SZ_LGRED_Cassette_09_20
20001747 ISO 9001: 2008
LG ELECTRONICS INC.
LG Electronics, U.S.A., Inc.
Air Conditioning Technologies
4300 North Point Parkway
Alpharetta, Georgia 30022
www.lghvac.com
