LG Electronics is a global leader and technology innovator in consumer electronics, mobile communications, and home appliances.
LG Electronics comprises five business units—Home Entertainment,
Mobile Communications, Air Conditioning, Business Solutions, and
Home Appliance. LG is one of the world’s leading producers of flat
panel televisions, audio and video products, mobile handsets, air
conditioners, and washing machines. LG’s commercial air conditioning business unit was established in 1968 and has built its lineup of
residential and commercial products to include VRF, Multi F, ductfree split systems, packaged terminal air conditioners (PTACs), and
room air conditioners. In 2011, the air conditioning and energy solutions business unit grew to include LED lighting and solar products.
For more information, visit www.lg.com.
Multi-Zone Systems
LG HVAC systems offer a range of solutions that are cost efficient,
quiet and attractive. Multi-zone systems are “split” into indoor and
outdoor units, and provide a smart alternative to both central HVAC
and window-mounted air conditioners. These inverter heat pump systems are available in a variety of configurations to suit different cooling and heating situations. Installation by a trained HVAC contractor
is safe and easy – little to no duct work or sheet metal is required.
Multi F Systems
LG’s inverter heat pumps can support two, three, or four indoor
units that are typically installed in separate rooms. Each indoor unit
Benefits of Multi F Systems
• Individual zone control
• Long refrigerant piping lengths
• High refrigerant piping elevation differences
• Maximum flexibility
• Operating ranges of 14°F to 118°F (DB) in cooling and -4°F to
75°F (DB) in heating if connected to standard Multi F Outdoor Units
or -13°F to 75°F (DB) in heating if connected to Multi F with LG
REDº Outdoor Units.
• Quiet and comfortable environment
Multi F and Multi F MAX Indoor Unit Engineering Manual
• Reduced ductwork
includes its own remote control, allowing the customer to set the
temperature individually. Indoor units are available in several differ-
ent congurations: Art Cool™ Mirror wall-mounted, Art Cool Gallery
wall-mounted, standard wall-mounted, four-way ceiling cassettes,
ceiling-concealed duct (high and low static), and vertical-horizontal air
handling models. Multi F MAX systems can operate up to eight indoor
units through two-, three-, or four-port branch distribution units.
Adaptable and Flexible
Multi F outdoor units can be adapted to a wide range of building ap-
plications and sizes such as schools, hotels, hospitals, ofces, and
residences. The system components are lightweight and compact so
they can be placed in buildings without expensive cranes, they easily
fit into most service elevators, and they can be set in place with
minimal structural reinforcements requirements.
Multi F technology allows you to pipe farther by reaching areas of the
building that would require the installation of a second system when
using traditional direct-expansion cooling and heating equipment. Multi
F provides the designer with uncompromised pipe system engineering
exibility—long pipe runs and large elevation differences. Whether your
building is a condominium, a hotel, a school, or an ofce complex, Multi
F is best suited to reach the farthest corners and elevations.
Smaller Chases and Plenums
LG Multi F systems use refrigerant piping to move heat, resulting in
smaller space requirements for piping as compared to chilled water
or roof top systems. This helps reduce the overall construction and
material cost of the building, and gives back leasable space. Flexible
and logical placement of system components, reduced back-andforth pipe lengths, and fewer joints lowers installation costs and
minimizes potential leaking.
Quality Commitment
LG is committed to the success of duct-free projects. We provide
technical support during installation and commissioning. LG offers
a variety of classes designed for installers and servicers on Multi F
installation. Classes are conducted at LG’s training centers
and in field locations at various
times throughout the year and on
special request.
4 | INTRODUCTION
Due to our policy of continuous product innovation, some specications may change without notication.
Multi-Zone Systems — Indoor Units and Outdoor Units
L
L = LG
Type: M = Multi-Zone
Component:
AN: Art Cool™ Wall-Mounted Indoor Unit
N: Standard Wall-Mounted Indoor Unit
CN: Four-Way Ceiling-Cassette Indoor Unit
DN: Ceiling-Concealed Duct (Low Static) Indoor Unit
HN: Ceiling-Concealed Duct (High Static) Indoor Unit
VN: Vertical-Horizontal Air Handling Indoor Unit
U: Outdoor Unit
Nominal Capacity
(Nominal cooling capacity in Btu/h):
07 = 7,000
09 = 9,000
12 = 12,000
Generation
Features:
H = Heat Pump
V = Inverter
T = High Wall-Mounted Indoor Unit
P = Art Cool Gallery Indoor Unit
15 = 15,000
18 = 18,000
24 = 24,000
30 = 30,000
36 = 36,000
42 = 42,000
M
48 = 48,000
54 = 54,000
DN126HV
Introduction
Branch Distribution Units
P = Part (Accessory)
Type: M = Multi-Zone
BD: Branch Distribution Unit
Family
Number of Port Connections
(Maximum Number of Connectable Indoor Units): 2, 3, 4
• Voltage for all equipment is 208-230V, 60 Hz, 1-phase.
• All indoor units are compatible with wired controllers.
• All outdoor units are LGAP control network compatible with PI-485 V-net Control Integration Board (PMNFP14A1, sold separately).
• Compatible single zone IDU nomenclature is listed in the Single Zone Wall-Mounted IDU Engineering Manual.
Generation: 0, 1
P
Due to our policy of continuous product innovation, some specications may change without notication.
Ventilation
Drain pump
E.S.P. control
Electric heater
High ceiling
Hot Start
Self diagnostics
Soft Dry (dehumidification)
Auto operation
Auto clean (coil dry)
Auto restart
Child lock
Operation
Forced operation
5
√√√√√√√
√√√√√√√
√√√√√√√
√√√√√√√
√√√
√√√√√√
ooooooo
√√√√
Group control – Requires the use
of one Group control Cable Kit
(PZCWRCG3) for every
ooooooo
additional indoor unit
Sleep mode
Timer (on/off)
Multi F and Multi F MAX Indoor Unit Engineering Manual
Weekly schedule
Two thermistor control
7-Day programmable controller
Simple wired remote controller
ANEH033B13 kW Electric Heater (18-36MBH)
ANEH053B15 kW Electric Heater (18-36MBH)
ANEH083B28 kW Electric Heater (18-36MBH)
ANEH103B210 kW Electric Heater (18-36MBH)
ANEH153B215 kW Electric Heater (36MBH)
ANEH203B220 kW Electric Heater (36MBH)
PRARH0Aux Heat Relay Kit
PCRCUDT3Wi-Fi Module
For Ceiling-Concealed Duct (High Static) Indoor Units
ZFBXBG01A High Efficiency Filter Box
ZFBXD201ADynamic V8 2VL Low Profile Air Cleaner
ZPLMV201ADynamic 2VL Air Cleaner Low Profile Return Air Plenum
ZFBXD402ADynamic V8 4VL Low Profile Air Cleaner
ZPLMV402ADynamic 4VL Air Cleaner Low Profile Return Air Plenum
ZFLT1301A4-Pack Dynamic V8 VL Air Cleaner Replacement Filter Pads
ZFLT1302A24-Pack Dynamic V8 VL Air Cleaner Replacement Filter Pads
ZGRLRA01ADynamic V8 Air Cleaner Louvered Return Air Grille (one per plenum )
ZGRLRA02ADynamic V8 Air Cleaner Egg Crate Return Air Grille (one per plenum)
PRARH0Aux Heat Relay Kit
Controls Accessories
PQWRHQ0FDBWireless Handheld Remote (Duct/VAHU)
PREMTA000APremium Controller
PREMTB10UProgrammable Controller
PQRCVCL0Q(W)Simple Controller (Wall/Cassette)
PREMTBVC0MultiSITE CRC1 Base Controller
PREMTBVC1MultiSITE CRC1 Plus Controller
ZVRCZ****MultiSITE CRC1 Wireless Accessories
PDRYCB100Dry Contact (Simple)
PDRYCB300Dry Contact (3rd party controller)
PDRYCB400Dry Contact (Setback)
ZRTBS01Remote Temp Sensor (Cassette/Duct/VAHU)
PZCWRCG3Group Control Cable Kit
PZCWRC1Controller Extension Cable
Due to our policy of continuous product innovation, some specications may change without notication.
“Air Velocity and Temperature Distribution” on page 18
“Refrigerant Flow Diagram” on page 19
“Wiring Diagram” on page 20
“Factory Supplied Parts and Materials” on page 21
“Installation and Best Layout Practices” on page 22
ART COOL MIRROR INDOOR UNITS
MULTI
F
MAX
MULTI
F
Mechanical Specications and Features
ART COOL Mirror Wall-Mounted
Indoor Units
General
All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. ART COOL Mirror
Wall-Mounted indoor units have a sound rating no higher than 44
dB(A) as tested per KSA0701 ISO Standard 3745.
Coil
Indoor unit coils are comprised of a minimum of two rows of
aluminum fins mechanically bonded to copper tubing. The coils are
pressure tested at the factory. Each unit is provided with a factory
installed condensate drain pan below the coil.
Refrigerant System
System is designed for use with R410A refrigerant. The refrigeration
circuit is pressure-tested at the factory and shipped with a holding
charge of helium gas. Refrigerant pipe connections are 45° flare.
All refrigerant lines from the outdoor unit to the indoor units must be
field insulated.
Electrical
Each indoor unit is designed to operate using 208–230/60/1 power
with voltage variances of ±10%.
Casing
Units are designed to mount on a vertical surface, and are shipped
with a separate back plate that secures the unit to the wall, protruding no more than nine (9) inches. Unit is designed so that refrigerant
piping can be installed in one (1) of four (4) different directions.
Finish
The Art Cool Mirror unit has a flat, architectural panel with a smoked
charcoal mirror finish. Unit casing has a dark grey finish and is
manufactured of heavy-duty acrylonitrile butadiene styrene (ABS)
and high impact polystyrene (HIPS) plastic.
Fan Assembly and Control
The unit has a single, direct-drive, crossow fan made of high strength
ABS plastic. The fan motor is brushless digitally controlled (BLDC)
with permanently lubricated and sealed ball bearings. The fan and
Multi F and Multi F MAX Indoor Unit Engineering Manual
motor assembly is mounted on vibration attenuating rubber grommets.
Fan speed is controlled using a microprocessor-based direct digitally
controlled algorithm that provides pre-programmed, eld-selectable
xed or auto fan speeds in the Heating and Cooling modes. For Art
Cool Mirror Wall-Mounted units, the indoor fan has Low, Med, High,
Jet Cool and Auto settings for Cooling mode; and has Low, Med, High,
Jet Heat and Auto settings for Heating mode. The Auto setting adjusts
the fan speed based on the difference between the controller setpoint
and space temperature. Also, the separate Chaos setting provides a
simultaneous and random change in fan speed and ow direction at
the discharge, simulating a natural outdoor breeze.
Air Filter
Return air inlet has a factory-supplied primary removable, washable
filter. The unit is also equipped with a secondary 3M Micro Dust
filter. Filters are accessed from the front of the unit without the use
of tools.
Airflow Guide Vanes
A motorized guide vane is factory installed, and allows the ability to
control the direction of airflow from side to side. A motorized louver
provides an automatic change in airflow by directing the air up and
down to provide uniform air distribution.
Microprocessor Control
The indoor unit is provided with an integrated control panel to communicate with the outdoor unit. All unit operation parameters are
stored in non-volatile memory resident on the unit microprocessor.
The microprocessor controls space temperature through using the
value provided by the temperature sensor within the indoor unit.
The microprocessor control will activate indoor unit operation when
the indoor room temperature falls below or rises above a setpoint
temperature, at which point, a signal is sent to the outdoor unit to
begin the appropriate mode. The microprocessor will also provide
self-diagnostics and auto restart functions. A field-supplied four-wire
power/communications cable must be installed to connect the indoor
unit(s) to the outdoor unit.
Controls
The indoor unit casing has a factory-standard, integral infrared
sensor designed to communicate with the supplied LG wireless
handheld remote controller. An optional LG supplied wired controller
is available as an additional accessory. Communication between the
indoor units and the outdoor unit is accomplished through 18 AWG,
four-core, stranded and shielded power/communication cable. The
indoor unit has built-in wi-fi and can be controlled with LG’s SmartThinQ app on a smart device. A field-supplied wi-fi network and
smart device are required. The SmartThinQ app is free and is available for Android and iOS smart devices.
Condensate
The unit is designed for gravity draining of condensate and includes
a flexible drain hose capable of installation in one of two directions.
Unit includes a connection that is compatible with the AquaGuard®
AG-9300-LG condensate sensor.
Due to our policy of continuous product innovation, some specications may change without notication.
Figure 1: Multi F Art Cool Mirror Wall-Mounted Indoor Unit.
• Built-in wi-fi
• Dehumidifying function
• Self diagnosis function
• Wireless LCD remote control included
ART COOL MIRROR INDOOR UNITS
MULTI
F
MAX
MULTI
F
Table 3: Multi F Art Cool Mirror Indoor Unit General Data.
Model NameLAN090HSV5LAN120HSV5LAN180HSV5
Nominal Cooling Capacity (Btu/h)
Nominal Heating Capacity (Btu/h)
Operating Range
Cooling (°F WB)
Heating (°F DB)
Fan
Type
Motor Output (W) x Qty.
1
1
General Data / Specications
9,00012,00018,000
10,90013,600 21,600
57-77
59-81
Cross Flow
30 x 160.0 x 1
Motor/Drive
Airflow Rate CFM (H/M/L)
Unit Data
Refrigerant Type
2
Refrigerant Control
Power Supply V, Ø, Hz3
Rated Amps (A)
Sound Pressure Level ±3 dB(A) (H/M/L)4
Dimensions (W x H x D, in.)
Net Unit Weight (lbs.)
Shipping Weight (lbs.)
Power Wiring / Communications Cable
(No. x AWG)5
Heat Exchanger
(Row x Column x Fin / inch) x Number
Pipe Size
Liquid (in.)
Vapor (in.)
Connection Size
Liquid (in.)
Vapor (in.)
Drain O.D. / I.D. (in.)
Brushless Digitally Controlled / Direct
268 / 218 / 169282 / 233 / 177558 / 438 / 353
R410A
EEV
208-230, 1, 60
0.4
36 / 32 / 2738 / 34 / 2944 / 38 / 34
32-15/16 x 12-1/8 x 7-9/1639-9/32 x 13-19/32 x 8-11/32
20.529.8
25.636.4
4 x 18
(2 x 23 x 22) x 1(2 x 16 x 20) x 1
1/4
3/81/2
1/43/8
3/85/8
27/32, 5/8
Art Cool Mirror™
1
accordance with standard length of each outdoor unit and a 0 ft. level difference between outdoor and
indoor units. All capacities are net with a combination ratio between 95 – 105%.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF
wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2
Nominal capacity is rated 0 ft. above sea level with corresponding refrigerant piping length in
This unit comes with a dry helium charge.
Due to our policy of continuous product innovation, some specications may change without notication.
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the
same in both cooling and heating mode. These values can increase due to ambient conditions during
operation.
5
All power wiring / communications cable to the IDUs be minimum 18 AWG, 4-conductor, stranded,
shielded or unshielded (if shielded, must be grounded to chassis at ODU only) and must comply with
applicable local and national codes.
ART COOL M IRROR | 11
ART COOL MIRROR INDOOR UNITS
MULTI
F
MAX
MULTI
F
Dimensions
Figure 2: LAN090HSV5 and LAN120HSV5 Dimensions.
Refrigerant, Drain
Pipe, and Cable
Knock Out Hole
1/8 (3) x 1/4 (6)
1/4 (6) x 1/8 (3)
1-1/4 (31)
2-7/16 (61.5)
5-31/32 (152)
1-3/32 (50.2)
1-1/16 (26.2)
2-7/32 (56)
2 (51)
Unit : inch (mm)
Air Outlet Hole
Air Outlet Hole
[28-5/32 (715)]
Bottom
Air Outlet
2 (51)
5/16 (8)
11/32 (9)
2-7/32(56)
5-31/32 (152)
3-27/32 (98)
2-7/32 (56)
12-1/8 (308)
10-11/32 (263)
Ø2-9/16 (65)
Display & Remote
Controller Signal
Receiver Signal
Refrigerant,
Drain Pipe
and Cable
Knock
Out Hole
2-17/32 (64)
5-19/32 (142)
85°
45°
15°
15°
5/8 (15.3)
55°
55°
1-9/32 (32.7)
(61)
2-13/32
* If airflow direction control is available,
CoolingHeating
1-27/32(47)
1-1/2 (38)
Up & DownLeft & Right
Connection
Decoration Cover
3-5/8 (92)
2-3/8 (60)
2-5/16
(59)
Refrigerant, Drain
Pipe and Cable
Knock Out Hole
Approx. 8-19/32 (218) to liquid pipe
Drain Hose
1-7/16 (33.5)
Terminal Block for
Power Supply and
Communication
Approx. 11-11/32 (288) to gas pipe
Multi F and Multi F MAX Indoor Unit Engineering Manual
32-15/16 (837)
Air Intake
7-9/16 (192)
3-21/32 (93)
[5-29/32 (150)]
Air Intake Hole
Left
Right
Rear
Air Intake Hole
[30-3/16 (767)]
Rear
12 | ART COO L MIRROR
29/32 (23)
Unit Outline
29/32 (23)
5-9/32 (134)
7-5/8 (194)
Installation Plate
7-27/32 (199)7-27/32 (199)5-19/32 (142)
Ø2-9/16 (65)
12-1/8 (308)
Fixing the Installation Plate, Drilling Hole
Connecting Gas/Liquid Pipe
Unit Outline
5-3/16 (132)
12-1/8 (308)
Due to our policy of continuous product innovation, some specications may change without notication.
Table 4: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LAN090HSV5
9,000
LAN120HSV5
12,000
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 5: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table (continued).
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LAN180HSV5
18,000
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 6: Multi F Art Cool Mirror Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity of
Indoor Unit
(Btu/h)
LAN090HSV5
10,900
LAN120HSV5
13,600
LAN180HSV5
21,600
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
• Measurement taken 2.6′ below the bottom of the unit and at a
distance of 3.3′ from face of unit.
• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±1.
• Tested in anechoic chamber per ISO Standard 3745.
Table 7: Sound Pressure Levels (dB[A]).
Sound Pressure Levels (dB[A]) (Cooling and Heating)
Model No.
LAN090HSV5363227
LAN120HSV5383429
LAN180HSV5443834
High Fan Speed
Medium Fan
Speed
Low Fan Speed
Art Cool Mirror™
Figure 5: Sound Pressure Level Diagrams.
LAN090HSV5LAN120HSV5
LAN180HSV5
Due to our policy of continuous product innovation, some specications may change without notication.
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes.
Improper installation can result in re, electric shock, physical injury, or death.
Note:
Read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of installation. Incorrect
installation can degrade or prevent proper operation.
Two (2)
One (1)
Required Tools
• Level
• Screwdriver
• Electric drill
• Hole core drill
• Flaring tool set
• Spanner (Half union)
• Thermometer
Art Cool Mirror™
Due to our policy of continuous product innovation, some specications may change without notication.
To avoid the possibility of re, do not install the unit in an area where combustible gas may generate, ow, stagnate, or leak. Failure to do so will cause
serious bodily injury or death. Before beginning installation, read the safety summary at the beginning of this manual.
Select a location for installing the wall-mounted indoor unit (IDU) that meets the following conditions:
• Where there is enough structural strength to bear the weight of the unit
• Where air circulation will not be blocked
• Where noise prevention is taken into consideration
• Ensure there is sufficient space from the ceiling and floor
• Locate the indoor unit in a location where it can be easily connected to the outdoor unit/branch distribution unit
• Include space for drainage to ensure condensate flows properly out of the unit when it is in cooling mode
• Use a level indicator to ensure the unit is installed on a level plane
Note:
The unit may be damaged, may malfunction, and/or will not operate as designed if installed in any of the following conditions:
Do not install the unit where it will be subjected to direct thermal radiation from other heat sources.
Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak.
Do not install the unit in a location where acidic solution and spray (sulfur) are often used.
Do not use the unit in environments where oil, steam, or sulfuric gas are present.
Do not install additional ventilation products on the chassis of the unit.
Do not install the unit near high-frequency generator sources.
Do not install the unit near a doorway.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some rooms
may be exposed to unconditioned air (room may be above or next to
an unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the
temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Figure 10:Minimum Clearance Requirements.
≥5 inches
Required Clearances
Figure 10 shows required clearance distances around a typical
installed wall-mounted unit.
Mounting the Installation Plate
The mounting wall should be strong and solid enough to protect the unit from vibration.
Multi F and Multi F MAX Indoor Unit Engineering Manual
• Mount the installation plate on the wall using the Type “A” screws. If mounting the unit on concrete, consider using anchor bolts.
• Always mount the installation plate horizontally. Measure the wall and mark the centerline using thread and a level.
Figure 11:Installation Plate for LAN090HSV5 and LAN120HSV5 Units.Figure 12:Installation Plate for LAN180HSV5 Units.
Due to our policy of continuous product innovation, some specications may change without notication.
Recommended height
>6-1/2 feet from floor
Unit Outline
18-1/8 inches22-7/16 inches
Installation Plate
Measuring Tape
4-1/8 inches
Measuring Tape Hanger
Ø2-3/4 inches
Right rear
piping
2-7/32 inches
8-5/32 inches
ART COOL MIRROR INDOOR UNITS
Installation plate
Right
Tubing Clamp
Down
Left
Back
Frame Cover
(3/16"~5/16")
MULTI
F
MAX
MULTI
F
Installation and Best Layout Practices
Drilling Piping Hole in the Wall
Use caution when drilling holes through walls. Drilling into power wiring in the wall can
cause serious bodily injury or death.
Follow the left or right piping clearance recommendations in Figure 3 or Figure 4.
1. Using a 2-5/8 (ø 65mm) inch hole core drill bit, drill a hole at either the right or
left side of the wall mounting. The hole should slant 3/16” to 5/16” from level
(upward on the indoor unit side and downward on the outdoor unit side).
2. Finish off the newly drilled hole as shown with bushing and sleeve covering.
Sleeve and bushing prevents damage to the tubing/bundling of the piping.
Figure 19:Drilling Piping Hole
Indoor
Core Drill
WALL
Outdoor
Bushing
Sleeve
Hanging the Indoor Unit Chassis
1. Attach the three (3) hooks on the top of the indoor unit to the top edge of
the installation plate. Verify the hooks are properly attached to the installation plate by gently shaking the indoor unit from side to side.
2. Unlock the tubing clamp from the indoor unit frame. For easier access be-
tween the bottom of the indoor unit and the wall, prop the clamp between
the indoor unit frame and installation plate.
3. Remove the screw covers at the bottom of the indoor unit, unscrew the
two (2) screws, remove the frame cover, remove the piping connection
cover, and position the piping for installation (down, back, left, or right).
Figure 14:Accessing the Back of the Indoor Unit.
Figure 15:Removing the Frame Cover.
Figure 13:Locking the Indoor Unit onto the Installation Plate.
Tubing Clamp
Figure 16:Exterior Back View of Indoor Unit.Figure 17:Piping Installed to the Left.
Art Cool Mirror™
Figure 18:Piping Installed to the Right.
Tape
Connecting
pipe
Drain hose
Due to our policy of continuous product innovation, some specications may change without notication.
• Follow manufacturer’s circuit diagrams in the technical manuals.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate.
• Confirm cable thickness specifications.
• 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.
• Loose wiring may cause unit to malfunction, overheat, and catch fire, resulting in severe injury or death.
Note:
• Terminal screws may become loose during transport. Properly tighten the terminal connections during installation.
A voltage drop may 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.
Connecting the Power Wiring and Communications Cable
1. Insert the power wiring/communications cable from the outdoor
unit or branch distribution unit (Multi F MAX systems only)
through the bottom of the indoor unit.
2. Connect each wire to its appropriate terminal on the indoor unit
control board. Verify that the color and terminal numbers from
the outdoor unit or branch distribution unit (Multi F MAX systems
only) wiring match the color and terminal numbers on the indoor
unit.
3. Secure the power wiring/communications cable with the cable
restraint.
Figure 21:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections—LAN090HSV5 and
LAN120HSV5 models.
GND
Indoor Unit Terminal Block
Multi F and Multi F MAX Indoor Unit Engineering Manual
BR
32(L2)1(L1)
BL
RD
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3 or S
GND
Figure 20:Connecting the Power Wiring / Communications Cable.
Figure 22:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections—LAN180HSV5 models.
24 | ART COOL MIRROR
GND
Indoor Unit Terminal Block
1(L1 )2(L2)
BR
BL
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3
RD
Due to our policy of continuous product innovation, some specications may change without notication.
Figure 24:Wired Controller Connection on the Indoor Unit Terminal
Block—LAN090HSV5 and LAN120HSV5 models.
Figure 25:Wired Controller Connection on the Indoor Unit Terminal
Block—LAN180HSV5 models.
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
Figure 26:Proper Location for the Wired Controller.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Operation Mode Sequence
Cooling Mode
↓
Auto Operation
↓
26 | ART COOL MIRR OR
Dehumidification Mode
↓
Heating Mode
Due to our policy of continuous product innovation, some specications may change without notication.
1. The controller wiring/cable can be installed in one of three direc-
tions: top, back, or on the right side. If top or right side installation
is desired, remove cable guide grooves on the controller, and
then position wiring/cable on applicable side.
2. Choose and mark the area of installation, and then screw the wall
plate into place (using the provided parts). Install the controller
wall plate to fit the electrical box if one is present. Ensure that no
gaps exist between the wall plate and the wall itself.
3. Arrange wiring/cables so as not to interfere with the controller
circuitry. Position the wired controller on the wall plate. Snap into
place by pressing the bottom part of the wired controller onto
the wall plate. Make sure that no gaps exist between the wired
controller and the wall plate on all sides.
4. To remove wired controller from the wall plate, insert a screwdriver into the two holes at the bottom. Twist screwdriver to
release controller. Do not damage the controller components
when removing.
Figure 27:Removing the Cable Guide Grooves.
Top
Back
Figure 28:Attaching the Wall Plate.Figure 29:Installing/Removing the
Right
Side
Controller.
Right
Side
Art Cool Mirror™
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. For applicable indoor units, an optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in
conjunction with a wired controller thermistor as previously described.
Due to our policy of continuous product innovation, some specications may change without notication.
“Air Velocity and Temperature Distribution” on page 35
“Refrigerant Flow Diagram” on page 36
“Wiring Diagram” on page 37
“Factory Supplied Parts and Materials” on page 38
“Installation and Best Layout Practices” on page 39
ART COOL GALLERY INDOOR UNITS
MULTI
F
MAX
MULTI
F
Mechanical Specications and Features
ART COOL Gallery Indoor Units
General
All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Art Cool Gallery
indoor units have a sound rating no higher than 42 dB(A) as tested
per KSA0701 ISO Standard 3745.
Coil
Indoor unit coils are comprised of a minimum of two rows of
aluminum fins mechanically bonded to copper tubing. The coils are
pressure tested at the factory. Each unit is provided with a factory
installed condensate drain pan below the coil.
Refrigerant System
System is designed for use with R410A refrigerant. The refrigeration
circuit is pressure-tested at the factory and shipped with a holding
charge of helium gas. Refrigerant pipe connections are 45° flare.
All refrigerant lines from the outdoor unit to the indoor units must be
field insulated.
Electrical
Each indoor unit is designed to operate using 208–230/60/1 power
with voltage variances of ±10%.
Casing
Units are designed to mount on a vertical surface, and are shipped
with a separate back plate that secures the unit to the wall, protruding no more than six (6) inches. Unit is designed so that refrigerant
piping can be installed in one of four different directions.
Cases / Finishes
The Art Cool Gallery unit has a frame that can accommodate a 20" x
20" photograph, picture or artwork. Unit casing has a gray finish and
is manufactured of heavy-duty acrylonitrile butadiene styrene (ABS)
and high impact polystyrene (HIPS) plastic.
Fan Assembly and Control
The unit has a single, direct-drive, crossflow fan made of high
strength ABS plastic. 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 digitally controlled algorithm that provides pre-programmed,
field-selectable fixed or auto fan speeds in the Heating and Cooling
modes. For Art Cool Gallery units, the indoor fan has Low, Med,
High, Power Cool and Auto settings for Cooling mode; and has Low,
Med, High, and Auto settings for Heating mode. The Auto setting
adjusts the fan speed based on the difference between the controller
setpoint and space temperature. Also, the separate Chaos setting
provides a simultaneous and random change in fan speed and flow
direction at the discharge,
simulating a natural outdoor
breeze.
Figure 30: Multi F Art Cool Gallery
Indoor Unit.
Air Filter
Return air is filtered with a
factory-supplied, removable,
washable pre-filter. Filter
access is from the front of
the unit without the use of
tools.
Airflow Guide Vanes
Motorized oscillating guide
vanes are factory installed,
and allows the ability to
control the direction of
airflow from side to side. A
motorized air sweep louver provides an automatic change in airflow
by directing the air up and down to provide uniform air distribution.
Microprocessor Control
The indoor unit is provided with an integrated control panel to
communicate with the outdoor unit. All unit operation parameters are
stored in non-volatile memory resident on the unit microprocessor.
The microprocessor controls space temperature through using the
value provided by the temperature sensor within the indoor unit.
The microprocessor control will activate indoor unit operation when
the indoor room temperature falls below or rises above a setpoint
temperature, at which point, a signal is sent to the outdoor unit to
begin the appropriate mode. The microprocessor will also provide
self-diagnostics and auto restart functions. A field-supplied fourwire power / communications cable must be installed to connect the
indoor unit(s) to the outdoor unit.
Controls
The indoor unit casing has a factory-standard, integral infrared
sensor designed to communicate with the supplied LG wireless
handheld remote controller. An optional LG supplied wired controller
is available as an additional accessory. Communication between the
indoor units and the outdoor unit is accomplished through 18 AWG,
four-core, stranded and shielded power / communication cable.
Condensate
The unit is designed for gravity draining of condensate and includes
a flexible drain hose capable of installation in one of two directions.
Unit includes a connection that is compatible with the AquaGuard®
AG-9300-LG condensate sensor.
Art Cool Gallery™
Features
• Inverter (Variable speed fan)
• Chaos swing
• Jet cool
• Group control
• Self-cleaning indoor coil
• Auto operation / auto restart operation
Due to our policy of continuous product innovation, some specications may change without notication.
Table 13: Multi F Art Cool Gallery Indoor Unit General Data.
Model NameLMAN097HVPLMAN127HVP
Nominal Cooling Capacity (Btu/h)
Nominal Heating Capacity (Btu/h)
1
1
Operating Range
Cooling (°F WB)
Heating (°F DB)
Fan
Type
Motor Output (W) x Qty.
Motor/Drive
Brushless Digitally Controlled / DirectBrushless Digitally Controlled / Direct
Airflow Rate CFM (H/M/L)
Unit Data
Refrigerant Type
2
Refrigerant Control
Power Supply V, Ø, Hz3
Rated Amps (A)
Sound Pressure Level ±3 dB(A) (H/M/L)4
Dimensions (W x H x D, in.)
23-5/8 x 23-5/8 x 5-25/3223-5/8 x 23-5/8 x 5-25/32
Net Unit Weight (lbs.)
Shipping Weight (lbs.)
Power Wiring / Communications Cable
(No. x AWG)5
Heat Exchanger
(Row x Column x Fin / inch) x Number
Piping
Liquid (in.)
Vapor (in.)
Drain O.D. / I.D. (in.)
1
Nominal capacity is rated 0 ft. above sea level with corresponding refrigerant piping length in
accordance with standard length of each outdoor unit and a 0 ft. level difference between outdoor and
Multi F and Multi F MAX Indoor Unit Engineering Manual
indoor units. All capacities are net with a combination ratio between 95 – 105%.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF
wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2
This unit comes with a dry helium charge.
9,00011,200
10,40013,300
57-7757-77
59-8159-81
TurboTurbo
24 x 124 x 1
272 / 208 / 155314 / 258 / 198
R410AR410A
EEVEEV
208-230, 1, 60 208-230, 1, 60
0.20.2
39 / 35 / 3142 / 38 / 34
3232
3737
4 x 184 x 18
(2 x 20 x 21) x 1(2 x 20 x 21) x 1
1/41/4
3/83/8
27/32, 5/827/32, 5/8
3
Acceptable operating voltage: 187V-253V.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the
same in both cooling and heating mode. These values can increase due to ambient conditions during
operation.
5
All power wiring / communications cable to the IDUs be minimum 18 AWG, 4-conductor, stranded,
shielded or unshielded (if shielded, must be grounded to chassis at ODU only) and must comply with
applicable local and national codes.
General Data / Specications
30 | ART CO OL GALLERY™
Due to our policy of continuous product innovation, some specications may change without notication.
Table 14: Multi F Art Cool Gallery Indoor Units Cooling Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMAN097HVP
9,000
LMAN127HVP
12,000
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 15: Multi F Art Cool Gallery Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMAN097HVP
9,000
LMAN127HVP
12,000
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Outdoor Air Temp.Indoor Air Temp. °F DB
°F DB°F WB
0-0.45.355.285.235.205.124.90
54.56.035.955.905.885.805.58
1096.716.636.586.566.486.26
17157.617.547.497.467.397.14
20197.957.887.837.807.727.46
25238.528.448.398.378.297.99
30289.018.938.888.868.788.52
35329.509.429.379.349.279.04
40369.949.869.819.789.719.48
454110.3710.3010.2510.2210.159.92
474310.5510.4810.4310.4010.3210.10
504610.7210.6410.5910.5710.4910.24
555111.0010.9310.8810.8510.7810.48
605611.0010.9310.8810.8510.7810.52
635911.0010.9310.8810.8510.7810.55
686411.0010.9310.8810.8510.7810.60
0-0.46.846.756.686.656.556.26
54.57.717.617.557.527.427.13
1098.588.488.428.388.298.00
17159.739.649.579.549.449.14
201910.1710.0710.019.989.889.54
252310.8910.7910.7310.7010.6010.22
302811.5211.4211.3611.3211.2310.89
353212.1412.0511.9811.9511.8511.57
403612.7112.6112.5512.5112.4212.13
454113.2713.1713.1113.0812.9812.69
474313.4913.4013.3313.3013.2012.91
504613.7113.6113.5513.5213.4213.10
555114.0713.9713.9113.8813.7813.40
605614.0713.9713.9113.8813.7813.46
635914.0713.9713.9113.8813.7813.49
686414.0713.9713.9113.8813.7813.55
616468707275
TCTCTCTCTCTC
Art Cool Gallery™
Due to our policy of continuous product innovation, some specications may change without notication.
• Measurement taken 2.6′ below the bottom of the unit and at a
distance of 3.3′ from face of unit.
• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 16: Sound Pressure Levels (dB[A]).
Sound Pressure Levels (dB[A]) (Cooling and Heating)
Model No.
High Fan Speed
Medium Fan
Speed
Low Fan Speed
LMAN097HVP393531
LMAN127HVP423834
Multi F and Multi F MAX Indoor Unit Engineering Manual
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Improper installation can result in re, electric shock, physical injury, or death.
Note:
Read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of installation. Incorrect
installation can degrade or prevent proper operation.
38 | ART CO OL GALL ERY™
Due to our policy of continuous product innovation, some specications may change without notication.
• Place the unit where air circulation will not be blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
• Ensure there is sufficient space from the ceiling and floor.
• Ensure there is sufficient maintenance space.
• Locate the indoor unit in a location where it can be easily connected to the outdoor
unit/branch distribution unit.
Don’ts
• Do not install the unit near a heat or steam source, or where considerable amounts of oil, iron powder, or flour are used.
• Do not install the unit where sulfuric acid and flammable or corrosive gases are generated, vented into, or stored.
• Do not install the unit near high-frequency generators.
• Do not install the unit near a doorway.
The unit may be damaged, may malfunction, and/ or will not operate as designed if installed in any of the conditions listed.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (oors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Figure 38:Minimum Clearance Requirements.
Figure 39:Using the Installation Guide.
Art Cool Gallery™
Using the Installation Guide
1. Choose an appropriate location for the indoor unit. To hang the installation guide, verify that it is level
and plumb, and then tape it to the wall.
2. Drill four (4) 1/4-inch diameter holes with a depth of 1-3/16 to 1-3/8 inches for the mounting screws.
Drill one (1) two (2) inch-diameter hole for the field-installed refrigerant and drain piping.
3. Insert a plastic anchor into each of the mounting holes.
4. Screw the top two (2) screws into the wall. Do not flush them to the wall; leave a 7/16 inch space for
hanging the indoor unit.
Note:
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.
Due to our policy of continuous product innovation, some specications may change without notication.
1. First pull the top of the front panel up (1A) and then out (1B).
2. Remove the two (2) screws at the bottom (2A), then lift off the front
panel (2B).
3. To completely detach the front panel, disconnect the panel connector
found at the top of the indoor unit (3).
Removing the Piping and Side Covers
1. Unscrew the center cover.
Figure 40:Preparing for Installation.
Figure 41:Removing the Piping and Side Covers.
2. Remove the cover from the side of the indoor unit chosen for the piping connections,
and then knock out the piping access hole. If the refrigerant piping will be connected
through the back of the unit, the access hole does not need to be knocked out.
3. Remove any burrs that may have been made.
Preparing the Drain Hose
1. Remove the rubber stopper from the chosen side of the indoor unit.
Multi F and Multi F MAX Indoor Unit Engineering Manual
2. Insert the drain hose into the handle of the drain pan.
3. Connect the drain hose to the field-installed drain piping.
40 | ART COOL GALLERY™
Due to our policy of continuous product innovation, some specications may change without notication.
Preparing the Refrigerant and Drain Piping Connections
1. Depending on the installation requirements, route the indoor unit refrigerant piping and the
drain hose to the left, right (see guidelines below), or rear of the frame.
2. Bundle the piping and drain hose with tape where they meet near the indoor unit frame. Po-
sition the drain hose at the bottom of the bundle (positioning the drain hose at the top of the
bundle may cause the drain pan to overflow inside the indoor unit).
Installing Piping on the Right Side of the Indoor Unit Frame
1. Press on the top of the clamp, and then
slowly guide the piping downward.
2. Bend the piping to the right side of the
indoor unit frame.
Do not bend the piping/drain hose from side to side; it may damage the components.
Figure 44:Right Side Piping Access.
Figure 43:Preparing the Refrigerant /
Drain Connections.
Art Cool Gallery™
Hanging the Indoor Unit Frame
1. Remove the installation guide and hang the indoor unit on the top two (2) screws. Verify
the indoor unit is hanging securely on the screws.
2. Align the holes at the bottom of the indoor unit to the mounting holes. Tighten first the top
screws, then tighten the bottom screws.
3. Verify that the indoor unit is completely secured to the wall by gently shaking it up and
down.
Figure 45:Hanging the Indoor Unit Frame.
1
Holes for Hanging
(On back of
indoor unit)
2
3
Due to our policy of continuous product innovation, some specications may change without notication.
Connecting the Indoor Unit Piping to the Field-Installed Piping
1. Center align the indoor unit piping (refrigerant and drain) and the field-installed
piping, then hand tighten the flare nut.
2. Tighten the flare nut with a torque wrench.
3. Attach the drain tube piping to the indoor unit drain hose as shown below.
Figure 47:Extending the Drain Hose.
If the drain hose is routed inside a room, add insulation
to prevent condensation from
forming.
Insulating the Refrigerant and Drain Piping
Figure 46:Indoor Unit to Field-Installed Piping Connection.
Figure 48:Insulating the Piping.
Ensure all piping is insulated. Exposed piping can cause burns if touched.
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be properly and completely
covered in insulation (up to the indoor unit piping connections). Any exposed piping may
generate condensate or will cause burns if touched. Insulation for this field-installed refrigerant piping must have a minimum heat resistance of 248°F.
Drain Piping Insulation
Drain piping must have insulation a minimum of 7/32 inches thick.
Installing the Insulation
1. Overlap the insulation at the connection of the field-installed piping and the indoor unit
piping. Tape together so there are no gaps.
2. Secure insulation to the rear piping housing section with vinyl tape.
3. Bundle the piping and drain hose with tape where they meet at the back of the indoor
unit frame. Position the drain hose at the bottom of the bundle (positioning the drain
hose at the top of the bundle may cause the drain pan to overflow inside the indoor
Multi F and Multi F MAX Indoor Unit Engineering Manual
unit).
Drain Slope
Drain hose should point
down so water can flow
away easily.
Figure 49:Drain Piping Slope.
42 | ART C OOL GAL LERY™
Checking the Drainage System
1. Pour water on the in-
2. Ensure the water
door unit evaporator.
flows through and out
of the hose and away
from the indoor unit
without leaking.
Due to our policy of continuous product innovation, some specications may change without notication.
• Follow manufacturer’s circuit diagrams in the technical manuals.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate.
• Confirm cable thickness specifications.
• 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.
• Loose wiring may cause unit to malfunction, overheat, and catch fire, resulting in severe injury or death.
Note:
• Terminal screws may become loose during transport. Properly tighten the terminal connections during installation.
A voltage drop may 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.
Art Cool Gallery™
Connecting the Power Wiring and Communications Cable
1. Insert the power wiring/communications cable from the outdoor unit or branch distribution unit (Multi F MAX systems only)
through the access hole of the indoor unit (ground wire should be
longer than the other wires/cables). Unscrew the control board
cover.
2. Connect each wire to its appropriate terminal on the indoor unit
control board. Verify that the color and terminal numbers from
the outdoor unit or branch distribution unit (Multi F MAX systems
only) wiring match the color and terminal numbers on the indoor
unit.
3. Secure the power wiring/communications cable to the control
board.
4. Reattach the control board cover.
Figure 52:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections—LMAN097HVP and
LMAN127HVP models.
Outdoor Unit Terminal Block or
GND
Indoor Unit Terminal Block
BR
32(L2)1(L1)
BL
RD
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3 or S
GND
Figure 51:Connecting the Power Wiring / Communications Cable.
Control Board Cover
Lock nut
(field supplied)
Conduit
(field supplied)
1(L1)2(L2) 3
Due to our policy of continuous product innovation, some specications may change without notication.
Timer button: Sets the current time and the start/end times.
Navigation/Functions Button1: Adjusts the time and sets the special functions.
Auto clean / Operates energy saving cooling / Adjusts the brightness
of the indoor unit display
Set/Clear Button: Sets or cancels functions.
Reset Button: Resets the air conditioner settings.
ART COOL GALLERY INDOOR UNITS
4 to 5 feet
above the floor
NO
NO
NO
YES
Remote Controller
TEMP
Remote Controller
TEMP
Re
m
ot
e
C
o
n
t
r
ol
l
er
TEMP
Top
WallWa ll
WallWall
Installing the Controller
Removing the Controller
Indoor Unit Terminal Block
GRN / YLW
(Multi F MAX Systems Only)
MULTI
F
MAX
MULTI
F
Wired Controller Connections
Figure 54:Wired Controller Connection on the Indoor Unit Terminal Block.
GND
Installation and Best Layout Practices
1(L1 )2(L2)
BR
BL
3
RD
To Outdoor Unit or Branch Distribution Unit
CN-REMO
To Wired Controller
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
Hanging the Wired Controller
1. The controller wiring/cable can be installed in one of three direc-
tions: top, back, or on the right side. If top or right side installation
is desired, remove cable guide grooves on the controller, and
then position wiring/cable on applicable side.
2. Choose and mark the area of installation, and then screw the wall
plate into place (using the provided parts). Install the controller
wall plate to fit the electrical box if one is present. Ensure that no
gaps exist between the wall plate and the wall itself.
3. Arrange wiring/cables so as not to interfere with the controller
circuitry. Position the wired controller on the wall plate. Snap into
place by pressing the bottom part of the wired controller onto
the wall plate. Make sure that no gaps exist between the wired
controller and the wall plate on all sides.
4. To remove wired controller from the wall plate, insert a screwdriver into the two holes at the bottom. Twist screwdriver to
release controller. Do not damage the controller components
when removing.
Figure 55:Proper Location for the Wired Controller.
Figure 56:Removing the Cable Guide Grooves.
Top
Back
Figure 57:Attaching the Wall Plate.
Right
Side
Figure 58:Installing/Removing the
Controller.
Right
Side
Art Cool Gallery™
Due to our policy of continuous product innovation, some specications may change without notication.
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. For applicable indoor units, an optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in
conjunction with a wired controller thermistor as previously described.
Finalizing Indoor Unit Installation
1. Verify that the side covers are closed or opened, depending on
installation requirements. Place the power wiring / communications cable in the bottom groove along the left side of the frame.
2. Reconnect the panel connector found at the top of the indoor unit.
3. Attach the top part of the front panel, then position its tabs in the
grooves on the bottom part of the indoor unit frame.
4. To ensure the front panel tabs are securely positioned in the
grooves, adjust the panel by loosening or tightening the screws
at the bottom.
Figure 59:Final Installation Step—Reattaching the Front Panel.
Front Panel
Connector
Multi F and Multi F MAX Indoor Unit Engineering Manual
46 | ART CO OL GALL ERY™
Due to our policy of continuous product innovation, some specications may change without notication.
“Air Velocity and Temperature Distribution” on page 60
“Refrigerant Flow Diagram” on page 62
“Wiring Diagram” on page 63
“Factory Supplied Parts and Materials” on page 65
“Installation and Best Layout Practices” on page 66
MULTI
F
MAX
MULTI
F
STANDARD WALL-MOUNTED INDOOR UNITS
Mechanical Specications and Features
Standard Wall-Mounted Indoor Units
General
All LG indoor units are factory assembled, wired, piped, and pro-
vided with a control circuit board, fan, and motor. Standard Wall-
Mounted units have a sound rating no higher than 46 dB(A) as tested
per KSA0701 ISO Standard 3745.
Coil
Indoor unit coils are comprised of a minimum of two rows of
aluminum fins mechanically bonded to copper tubing. The coils are
pressure tested at the factory. Each unit is provided with a factory
installed condensate drain pan below the coil.
Refrigerant System
The system is designed for use with R410A refrigerant. The refrigeration circuit is pressure-tested at the factory and shipped with a
holding charge of helium gas. Refrigerant pipe connections are 45°
flare. All refrigerant lines from the outdoor unit to the indoor units
must be field insulated.
Electrical
The indoor units require 208–230Vac/60Hz/1Φ power with voltage
variance of no more than ±10%.
Casing
The units mount on a vertical surface. They are shipped with a separate back plate that secures the unit to the wall, protruding no more
than nine (9) inches. Refrigerant piping can be installed in one (1) of
four (4) different directions.
Finish
The Standard Wall-Mounted unit has a curved architectural panel
with a pearl white finish. Unit casing has a pearl white or dark gray
finish and is manufactured of heavy-duty acrylonitrile butadiene
styrene (ABS) and high impact polystyrene (HIPS) plastic.
Fan Assembly and Control
The unit has a single, direct-drive, crossow fan made of high strength
ABS plastic. 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 digitally
controlled algorithm that provides pre-programmed, eld-selectable
xed or auto fan speeds in the Heating and Cooling modes. For
Standard Wall-Mounted units, the indoor fan has Low, Med, High, Jet
Cool, and Auto settings for Cooling mode; and has Low, Med, High,
Jet Heat, and Auto settings for Heating mode. The Auto setting adjusts
the fan speed based on the difference between the controller setpoint
and space temperature. Also, the separate Chaos setting provides a
simultaneous and random change in fan speed and ow direction at
the discharge, simulating a natural outdoor breeze.
Features
• Inverter (Variable speed fan)
• Comfort Air
• 3M filter
• Jet cool/Jet Heat
Figure 60: Multi F Standard Wall-Mounted Indoor Unit.
Air Filter
The return air inlet has a factory-supplied primary removable, washable filter. The unit is also equipped with a secondary 3M Micro Dust
filter. Filters are accessed from the front of the unit without the use
of tools.
Airflow Guide Vanes
A factory-installed motorized guide vane controls the direction of
airflow from side to side. A motorized louver provides an automatic
change in airflow by directing the air up and down for uniform air
distribution.
Microprocessor Control
The indoor unit has an integrated control panel to communicate with
the outdoor unit. All unit operation parameters are stored in non-volatile memory resident on the unit microprocessor. The microprocessor
controls space temperature through using the value provided by the
temperature sensor within the indoor unit. The microprocessor control
will activate indoor unit operation when the indoor room temperature
falls below or rises above a setpoint temperature, at which point, a
signal is sent to the outdoor unit to begin the appropriate mode. The
microprocessor also provides self-diagnostics and auto restart func-
tions. A eld-supplied four-wire power / communications cable must
be installed to connect the indoor unit(s) to the outdoor unit.
Controls
The indoor unit casing has a factory-standard, integral infrared sensor to communicate with the supplied LG wireless handheld remote
controller. An optional LG supplied wired controller is available as
an additional accessory. Communication between the indoor units
and the outdoor unit is accomplished through 18 AWG, four-core,
stranded and shielded power / communication cable. The indoor unit
has built-in wi-fi and can be controlled with LG’s SmartThinQ app on
a smart device. A field-supplied wi-fi network and smart device are
required. The SmartThinQ app is free and is available for Android
and iOS smart devices.
Condensate
The unit is designed for gravity draining of condensate and includes
a flexible drain hose capable of installation in one of two directions.
The unit also includes a connection that is compatible with the AquaGuard® AG-9300-LG condensate sensor.
• Group control
• Self-cleaning indoor coil
• Auto operation
• Auto restart operation
Due to our policy of continuous product innovation, some specications may change without notication.
Table 21: Multi F Standard Wall-Mounted Indoor Unit General Data.
Model NameLMN079HVTLSN090HSV5LSN120HSV5LMN159HVTLSN180HSV5LMN249HVT
Nominal Cooling Capacity (Btu/h)
Nominal Heating Capacity (Btu/h)
1
1
Operating Range
Cooling (°F WB)
Heating (°F DB)
Fan
Type
Motor Output (W) x Qty.
Motor/Drive
Airflow Rate CFM (H/M/L)
Unit Data
Refrigerant Type
2
Refrigerant Control
Power Supply V, Ø, Hz3
Rated Amps (A)
Sound Pressure Level ±3 dB(A)
(H/M/L)4
Dimensions (W x H x D, in.)
Net Unit Weight (lbs.)
Shipping Weight (lbs.)
Power Wiring / Communications
Cable (No. x AWG)5
Heat Exchanger (Row x Column x
Fin / inch) x Number
Pipe Size
Liquid (in.)
Vapor (in.)
Connection Size
Multi F and Multi F MAX Indoor Unit Engineering Manual
Liquid (in.)
Vapor (in.)
Drain O.D. / I.D. (in.)
1
Nominal capacity is rated 0 ft. above sea level with corresponding refrigerant piping length in
accordance with standard length of each outdoor unit and a 0 ft. level difference between outdoor and
indoor units. All capacities are net with a combination ratio between 95 – 105%.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF
wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the
same in both cooling and heating mode. These values can increase due to ambient conditions during
operation.
5
All power wiring / communications cable to the IDUs be minimum 18 AWG, 4-conductor, stranded,
shielded or unshielded (if shielded, must be grounded to chassis at ODU only) and must comply with
applicable local and national codes.
39-9/32 x
13-19/32 x 8-9/32
50 | STD. WALL-MOUNTED
Due to our policy of continuous product innovation, some specications may change without notication.
Table 22: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMN079HVT
7,000
LSN090HSV5
9,000
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 23: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table (continued).
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LSN120HSV5
12,000
LMN159HVT
14,300
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 24: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table (continued).
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LSN180HSV5
18,000
LMN249HVT
24,000
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 25: Multi F Standard Wall-Mounted Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity of
Indoor Unit (Btu/h)
LMN079HVT
8,100
LSN090HSV5
10,900
LSN120HSV5
13,600
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Table 26: Multi F Standard Wall-Mounted Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity of
Indoor Unit (Btu/h)
LMN159HVT
15,600
LSN180HSV5
21,600
LMN249HVT
25,600
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
• Measurement taken 2.6′ below the bottom of the unit and at a
distance of 3.3′ from face of unit.
• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±1.
• Tested in anechoic chamber per ISO Standard 3745.
Table 27: Sound Pressure Levels (dB[A]).
Sound Pressure Levels (dB[A]) (Cooling and Heating)
Model No.
LMN079HVT353126
LSN090HSV5363227
LSN120HSV5383429
LMN159HVT423832
LSN180HSV5443834
LMN249HVT464136
High Fan Speed
Medium Fan
Speed
Low Fan Speed
Figure 64:LMN079HVT, LSN090HSV5, and LSN120HSV5 Sound Pressure Level Diagrams.
LMN079HVT
LSN090HSV5
Multi F and Multi F MAX Indoor Unit Engineering Manual
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes.
Improper installation can result in re, electric shock, physical injury, or death.
Note:
Read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of installation. Incorrect
installation can degrade or prevent proper operation.
One (1)
Required Tools
• Level
• Screwdriver
• Electric drill
• Hole core drill
• Flaring tool set
• Spanner (Half union)
• Thermometer
Due to our policy of continuous product innovation, some specications may change without notication.
• Place the unit where air circulation will not be blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
• Ensure there is sufficient space from the ceiling and floor.
• Ensure there is sufficient maintenance space.
• Locate the indoor unit where it can be easily connected to the outdoor unit or branch
distribution unit.
Don’ts
• Do not install the unit near a heat or steam source, or where considerable amounts of oil, iron powder, or flour are used.
• Do not install the unit where sulfuric acid and flammable or corrosive gases are generated, vented into, or stored.
• Do not install the unit near high-frequency generators.
• Do not install the unit near a doorway.
The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Figure 73:Installation Plate—
Side View.
Mounting the Installation Plate
The mounting wall should be strong and solid enough to protect the unit from
vibration.
• Mount the installation plate on the wall using the Type “A” screws. If mounting
the unit on concrete, consider using anchor bolts.
• Always mount the installation plate horizontally. Measure the wall and mark the
centerline using thread and a level.
Figure 74:Installation Plate for LMN079HVT, LSN090HSV5,
LSN120HSV5, and LMN159HVT Units.Figure 75:Installation Plate for LSN180HSV5 and LMN249HVT Units.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Unit Outline
Ø2-9/16
6-7/8
5-3/163-11/16
Place a level on raised tab
17-3/817-3/8
5
8-1/2
Ø2-9/16
Left rear
piping
2-23/32 inches
Unit Outline
4-1/8 inches
18-1/8 inches22-7/16 inches
Installation Plate
Measuring Tape
Measuring Tape Hanger
Ø2-3/4 inches
Right rear
piping
2-7/32 inches
8-5/32 inches
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.
66 | STD. WALL-MOUNTED
Due to our policy of continuous product innovation, some specications may change without notication.
Prepare the refrigerant piping and drain hose (indoor unit piping) for installation through the
wall: press on the top of the tubing clamp and slowly guide the piping / hose down (depending
on installation requirements, then to the left or right). Relock the tubing clamp after the piping /
hose are released.
Note:
Do not bend the piping / drain hose from side to side; it may damage the components.
Hanging the Indoor Unit Frame
1. Attach the three (3) hooks on the top of the indoor unit to the top edge of the installation plate. Verify the hooks are properly attached to the installation plate by gently
shaking the indoor unit from side to side.
2. Unlock the tubing clamp from the indoor unit frame. For easier access between the
bottom of the indoor unit and the wall, prop the clamp between the indoor unit frame
and installation plate.
3. Remove the screw covers at the bottom of the indoor unit, unscrew the two (2) screws,
remove the frame cover, remove the piping connection cover, and position the piping
for installation (down, back, left, or right).
Figure 76:Preparing for Installation.
Standard Wall-Mounted
Figure 77:Locking the Indoor Unit onto the Installation Plate.
Figure 79:Removing the Frame Cover.
Figure 81:Piping Installed to the Left.
Figure 78:Accessing the Back of the Indoor Unit.
Figure 80:Exterior Back View of Indoor Unit.
Figure 82:Piping Installed to the Right.
Connecting
pipe
Tape
Drain hose
Due to our policy of continuous product innovation, some specications may change without notication.
• Follow manufacturer’s circuit diagrams in the technical manuals.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate.
• Confirm cable thickness specifications.
• 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.
• Loose wiring may cause unit to malfunction, overheat, and catch
fire, resulting in severe injury or death.
Figure 83: Connecting Power Wiring / Communications Cable.
Note:
• Terminal screws may become loose during transport. Properly
tighten the terminal connections during installation.
A voltage drop may 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.
Connect Power Wiring and
Communications Cable
1. Insert the power wiring / communications cable from the outdoor
unit or branch distribution unit (Multi F MAX systems only) through
the bottom of the indoor unit.
2. Connect each wire to its appropriate terminal on the indoor unit
control board. Verify that the color and terminal numbers from the
outdoor unit or branch distribution unit (Multi F MAX systems only)
wiring match the color and terminal numbers on the indoor unit.
3. Secure power wiring/communications cable with cable restraint.
Figure 84:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections—LMN079HVT, LSN090HSV5,
LSN120HSV5 and LMN159HVT.
Outdoor Unit Terminal Block or
Multi F and Multi F MAX Indoor Unit Engineering Manual
GND
Indoor Unit Terminal Block
32(L2)1(L1)
BR
BL
RD
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3 or S
GND
Figure 85:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections— LSN180HSV5 and
LMN249HVT.
GND
Indoor Unit Terminal Block
1(L1 )2(L2)
BR
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3
BL
RD
3 or S
GND
68 | STD. WALL-MOUNTED
Due to our policy of continuous product innovation, some specications may change without notication.
Figure 87:Wired Controller Connection on Indoor Unit Terminal Block—
LMN079HVT, LSN090HSV5, LSN120HSV5, and LMN159HVT Models.
GND
1(L1 )2(L2)
BR
BL
3
RD
To Outdoor Unit or Branch Distribution Unit
CN-REMO
To Wired Controller
Figure 88:Wired Controller Connection on Indoor Unit Terminal Block—
LSN180HSV5 and LMN249HVT Models.
GND
1(L1 )2(L2)
BR
To Outdoor Unit or Branch Distribution Unit
(Multi F MAX Systems Only)
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
CN-REMO
BL
3
RD
Figure 89:Proper Location for the Wired Controller.
Multi F and Multi F MAX Indoor Unit Engineering Manual
70 | STD. WALL-MOUNTED
Due to our policy of continuous product innovation, some specications may change without notication.
1. The controller wiring / cable can be installed in one of three direc-
tions: top, back, or on the right side. If top or right side installation
is desired, remove cable guide grooves on the controller, and
then position wiring / cable on applicable side.
2. Choose and mark the area of installation. Use the provided parts
and screw the wall plate into place. Install the controller wall plate
to fit the electrical box if one is present. Ensure that no gaps exist
between the wall plate and the wall itself.
3. Arrange wiring / cables so as not to interfere with the controller
circuitry. Position the wired controller on the wall plate. Snap into
place by pressing the bottom part of the wired controller onto
the wall plate. Make sure that no gaps exist between the wired
controller and the wall plate on all sides.
4. To remove wired controller from the wall plate, insert a screw-
driver into the two holes at the bottom. Twist screwdriver to
release controller. Do not damage the controller components
when removing.
Figure 91:Removing the Cable Guide Grooves.
Top
Back
Figure 92:Attaching the Wall Plate.
Right
Side
Figure 93:Installing / Removing
the Controller.
Right
Side
Standard Wall-Mounted
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. For applicable indoor units, an optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in
conjunction with a wired controller thermistor as previously described.
Finalizing Indoor Unit Installation
1. Move the tubing clamp to its original position.
2. Ensure the three (3) hooks are properly attached to the installa-
tion plate by gently shaking the indoor unit from side to side.
3. Press the bottom left and right sides of the indoor unit against the
installation plate until the hooks click firmly into their slots.
4. Using two (2) Type “C” screws, secure the bottom of the indoor
unit to the installation plate.
5. Remove the two (2) tabs from the filter.
6. Replace the frame cover.
Figure 90:Attach Bottom of Indoor Unit to Installation Plate.
Type 'C' screws
Figure 94:Removing the Filter Tabs.
Due to our policy of continuous product innovation, some specications may change without notication.
“Installation and Best Layout Practices” on page 85
DUCT (LOW STATIC) INDOOR UNITS
MULTI
F
MAX
MULTI
F
Mechanical Specications and Features
Ceiling-Concealed Duct (Low Static)
Indoor Unit
General
All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Ceiling-Concealed
Duct (Low Static) units have a sound rating no higher than 36 dB(A)
as tested per KSA0701 ISO Standard 3745, and are designed for
low-static pressure up to 0.20″WG.
Coil
Indoor unit coils are factory built and are comprised of aluminum fins
mechanically bonded to copper tubing. Each unit has two rows of
coils, which are pressure tested at the factory. Each unit is provided
with a factory installed condensate drain pan below the coil.
Refrigerant System
System is designed for use with R410A refrigerant. The refrigeration
circuit is pressure-tested at the factory and shipped with a holding
charge of helium gas. Refrigerant pipe connections are 45° flare,
and all refrigerant lines from the outdoor unit to the indoor units must
be field insulated.
Electrical
Each indoor unit is designed to operate using 208–230/60/1 power
with voltage variances of ±10%.
Casing
The case has a low profile design with a maximum height of 7.5
inches designed to mount fully concealed above a finished ceiling in
as little as 8 inches vertical space. Casing is manufactured of galvanized steel plate, and provided with hanger brackets designed to
support the weight on four corners. Unit has a front horizontal supply
air discharge outlet, and one rear horizontal return air inlet; unit is
also field-convertible for a rear bottom return.
Fan Assembly and Control
The units have at least two direct-drive, Sirocco fans made of
high strength ABS HT-700 polymeric resin that are statically and
dynamically balanced. The fans are mounted on a common brushless digitally controlled (BLDC) motor 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. The indoor
fan has Low, Med, High, and Auto settings for Cooling mode; and
Figure 95: Ceiling-Concealed Duct (Low Static) Indoor Unit.
has Low, Med, High, and Auto settings for Heating mode. Each of the
settings can be field-adjusted from the factory setting (RPM / ESP).
The Auto setting adjusts the fan speed based on the difference
between the controller set-point and space temperature.
Air Filter
Return air is filtered with a factory-supplied, removable, washable
filter accessible from the rear of the indoor unit.
Microprocessor Control
The unit is provided with an integrated control panel to communicate
with the outdoor unit. All unit operation parameters are stored in nonvolatile memory residing on the unit microprocessor. The microprocessor controls space temperature through using the value provided
by the temperature sensor within the indoor unit. The microprocessor
control will activate indoor unit operation when the indoor room temperature falls below or rises above a setpoint temperature, at which
point, a signal is sent to the outdoor unit to begin the appropriate
mode. The microprocessor will also provide self-diagnostics and auto
restart functions. A field-supplied four-wire power / communications
cable must be installed to connect the indoor unit(s) to the outdoor
unit.
Controls
The indoor unit is supplied with an LG wired controller. Communication between the indoor units and the outdoor unit is accomplished
through 18 AWG, four-core, stranded and shielded power / communication cable.
Condensate Lift/Pump
The indoor unit is provided with an externally mounted, factory
installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom surface of the unit. Drain pump
has a safety switch to shut off the indoor unit if the condensate rises
too high in the drain pan.
Ceiling-Concealed Duct (Low Static)
Features
• Inverter (Variable speed fan)
• External mounted drain pump
• Control lock function
• Auto operation
• Auto restart operation
• Dehumidification function
• Two thermistor control
• External static pressure control
Due to our policy of continuous product innovation, some specications may change without notication.
Table 34: Multi F Ceiling-Concealed Low-Static Ducted Indoor Unit General Data.
Model NameLDN097HV4LDN127HV4LMDN186HV
Nominal Cooling Capacity (Btu/h)
Nominal Heating Capacity (Btu/h)
1
1
Operating Range
Cooling (°F WB)
Heating (°F DB)
Fan
Type
Motor Output (W) x Qty.
Motor/Drive
Airflow Rate CFM (H/M/L)
Factory Set External Static Pressure (in. wg)
Max. External Static Pressure (in. wg)
Unit Data
Refrigerant Type
2
Refrigerant Control
Power Supply V, Ø, Hz3
Rated Amps (A)
Sound Pressure Level ±3 dB(A) (H/M/L)4
Dimensions (W x H x D, in.)
27-9/16 x 7-15/32 x 27-9/1635-7/16 x 7-15/32 x 27-9/16
Net Unit Weight (lbs.)
Shipping Weight (lbs.)
Power Wiring / Communications Cable (No. x AWG)5
Heat Exchanger (Row x Column x Fin / inch) x Number
Piping
Liquid (in.)
Vapor (in.)
Drain O.D. / I.D. (in.)
1
Nominal capacity is rated 0 ft. above sea level with corresponding refrigerant piping length in
Multi F and Multi F MAX Indoor Unit Engineering Manual
accordance with standard length of each outdoor unit and a 0 ft. level difference between outdoor and
indoor units. All capacities are net with a combination ratio between 95 – 105%.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF
wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2
This unit comes with a dry helium charge.
9,00012,00018,000
10,40013,800 20,800
19 x 15 x 1, 19 x 1
Brushless Digitally Controlled / Direct
318 / 247 / 194353 / 300 / 247530 / 441 / 353
0.400.80
30 / 26 / 2331 / 28 / 2736 / 34 / 31
3951
466057
(2 x 11 x 14) x 1(2 x 11 x 18) x 1
3/81/2
3
Acceptable operating voltage: 187V-253V.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the
same in both cooling and heating mode. These values can increase due to ambient conditions during
operation.
5
All power wiring / communications cable to the IDUs be minimum 18 AWG, 4-conductor, stranded,
shielded or unshielded (if shielded, must be grounded to chassis at ODU only) and must comply with
applicable local and national codes.
57-77
59-81
Sirocco
0.10
0.20
R410A
EEV
208-230, 1, 60
4 x 18
1/4
1-1/4, 1
74 | D UCT (LOW STATIC)
Due to our policy of continuous product innovation, some specications may change without notication.
Table 35: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LDN097HV4
9,000
LDN127HV4
12,000
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 36: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table (continued).
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMDN186HV
18,000
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 37: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity of
Indoor Unit
(Btu/h)
LDN097HV4
9,000
LDN127HV4
12,000
LMDN186HV
18,000
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Table 38: Multi F Ceiling-Concealed Duct (Low Static) External Static Pressure Setting Values Table.
Static Pressure (in. wg)0.00.040.080.120.160.20
External Static Pressure
Model No. / Nominal Capacity
of Indoor Unit (Btu/h)
LDN097HV4
9,000
LDN127HV4
12,000
LMDN186HV
18,000
• To get the desired air flow and external static pressure combination, use the setting value from the table. Using a setting value other
than that listed in the table will not provide the desired combination.
• Table data is based at 230V. Air flow rate varies according to voltage fluctuation.
Airflow Rate / CFMSetting Value
High31898103108116123130
Mid247828894102110118
Low1946976839199109
High3539599104109116124
Mid30086919610110811 6
Low24778828793100108
High530123125129134141145
Mid44110911 2117123129136
Low353959910410911 6124
Ceiling-Concealed Duct (Low Static)
Due to our policy of continuous product innovation, some specications may change without notication.
• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 39:Sound Pressure Levels (dB[A]).
Sound Pressure Levels (dB[A]) (Cooling and Heating)
Model No.
LDN097HV4
LDN127HV4
High Fan Speed
302623
312827
Medium Fan
Speed
Low Fan Speed
LMDN186HV363431
80
70
60
50
40
Multi F and Multi F MAX Indoor Unit Engineering Manual
80 | DUCT (LOW STATIC)
30
20
Approximate
Hearing
Threshold
10
63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency (Hz)
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
Due to our policy of continuous product innovation, some specications may change without notication.
Simple Mode Controllers for the ceiling-concealed duct (low static) indoor units are also referenced by Model No. PQRCVCL0QW.
One (1) Set
For Vapor Piping For Liquid Piping
Hanging
Brackets
Simple
Controller
with Mode
Selection
(AKB72955816)
Eight (8)
One (1)
1
Factory Supplied Materials
• Owner’s Manual
• Installation Manual
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes.
Improper installation can result in re, electric shock, physical injury, or death.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Required Tools
• Level
• Screwdriver
• Electric drill
• Hole core drill
• Flaring tool set
• Torque wrenches
• Hexagonal wrench
• Gas-leak detector
• Thermometer
Note:
Read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of installation. Incorrect
installation can degrade or prevent proper operation.
84 | DUCT (LOW STATIC)
Due to our policy of continuous product innovation, some specications may change without notication.
• "H" dimension is necessary to ensure a slope is included for
condensate drainage.
Side view
23-5/8
23-5/8
(Unit : Inch)
(Unit : Inch)
Top view
MULTI
F
MAX
MULTI
F
Installation and Best Layout Practices
Selecting the Best Location
Do’s
• Place the unit where air circulation will not be blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
• Ensure there is sufcient strength to bear the load of the indoor unit.
• Ensure there is sufficient maintenance space.
• Locate the indoor unit in a location that is level, and where it can be easily
connected to the outdoor unit / branch distribution unit.
Don’ts
• Do not install the unit near a heat or steam source, or where considerable
amounts of oil, iron powder, or flour are used.
• Do not install the unit where sulfuric acid and flammable or corrosive gases
are generated, vented into, or stored.
• Do not install the unit near high-frequency generators.
• Do not install the unit near a doorway.
The unit may be damaged, may malfunction, and / or will not operate
as designed if installed in any of the conditions listed.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas(floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an unheated garage
or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the temperature
by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Figure 102:General Installation Guidelines.
Figure 103:Service / Access Panel Dimensions.
A (Min)
B (Min)
Ceiling-Concealed Duct (Low Static)
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.
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.
Table 45:General Access Panel Dimensions.
Model / Capacity (Btu/h)
LDN097HV4 / 9,000
LDN127HV4 / 12,000
LMDN186HV / 18,000
Due to our policy of continuous product innovation, some specications may change without notication.
Figure 105:Air inlet from the bottom of the
indoor unit.
ABCDEFGHIJ
Table 47:Indoor Unit Bolt Locations.
Dimensions (in.)
24-23/3227-9/161-13/327-15/3225/32
25-31/32
27-9/16
6-3/32
Preparing the Installation Area and Hanging the Indoor Unit Frame
1. Select and mark the area for the suspension or console bolts
(use embedded inserts or anchor bolts in new buildings, and
hole-in-anchors in older buildings).
2. Drill the holes.
3. Add the set-anchor and the plate washer to the bolts (bolts
should be at least 13/32 inches in diameter), and then insert the
bolts into the installation area.
Figure 106:Preparing the Installation Area.
Figure 107:Console Bolt Options.
4. Add the plate washer, spring washer, and nut to secure the bolts
into the installation area.
5. Position the indoor unit installation plates onto the bolts. Secure
using nuts, plate washers, and spring washers. Adjust for level as
necessary.
Figure 108:Hanging the Indoor Unit.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Install a canvas duct to the air outlet and air inlet so that vibration from the indoor unit does not carry
to the duct or ceiling. Also, add insulation to the interior of the duct, and apply anti-vibration to the
suspension bolts.
M10 Nut
M10 SP. washer
M10 washer
M10 washer
M10 SP. washer
M10 Nut
X 4
X 4
X 4
X 4
X 4
X 4
(Field
supplied)
(Field
supplied)
86 | DUCT (LOW STATIC)
• Unit must be installed correctly.
• Tighten the nuts and bolts to prevent the unit from falling.
Due to our policy of continuous product innovation, some specications may change without notication.
• Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow,
slope should not be straight up and down.
• Do not damage the drain port on the indoor unit when connecting the field-supplied drain
piping.
• Drain piping specifications:
- Indoor Unit Drain Connection: 1-1/4 inch outside diameter.
- Field-Supplied Drain Piping: Polyvinyl chloride piping with 1-inch inside diameter and pipe
fittings.
Ducted (low static) indoor units have two options for condensate drainage: Using the factory-installed drain pump, or using a gravity drain.
Using the Drain Pump
• Maximum drain lift is 27-9/16 inches, therefore, the drain piping should be placed below
the maximum lift height.
• Field-installed drain piping must have downward gradient of at least 1/50 to 1/100; to
prevent reverse flow, slope should not be straight up and down.
Using the Gravity Drain
Field-drain piping must have downward gradient of at least 1/50 to 1/100; to prevent
reverse flow, slope should not be straight up and down.
Figure 109:Drain Connection.
(Field Supplied)
Drain Pipe
(Field Supplied)
Indoor Unit
Drain HoleClose Any Gaps
Figure 110:Indoor Unit Using Drain Pump.
Pump location may be different on the indoor unit.
Figure 111:Indoor Unit Using Gravity Drain.
Ceiling-Concealed Duct (Low Static)
Checking the Drain Pump
The unit uses a drain pump to remove condensate. The pump must be tested before the
system operates.
• Connect the flexible drain hose to the field-installed drain piping; leave it as is until the
test is complete.
• Pour water into the flexible drain hose and check for leaks.
• After power wiring installation is complete, operate the drain pump to see if it sounds
and functions properly.
• After the test is complete, connect the flexible drain hose to the indoor unit drain port.
Checking the Drainage System
1. Remove the air filter.
2. Check the drainage.
• Spray water on the evaporator.
• Verify that water flows through the indoor unit drain
hose without leaking.
Figure 112:Checking the Drain Pump.
Figure 113:Checking the Drainage System.
Due to our policy of continuous product innovation, some specications may change without notication.
Ensure all piping is insulated. Exposed piping can cause burns
if touched.
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be
properly and completely covered in insulation (up to the indoor unit
piping connections). Any exposed piping may generate condensate
or will cause burns if touched. Insulation for this field-installed refrigerant piping must have a minimum heat resistance of 248°F.
Duct (low static) indoor units have been tested under and meet the
requirements of the “KS Conditions.” If the indoor unit is installed
and is operated at an extended period in a highly humid environment
(dew point temperature >73°F), however, condensate will form. To
prevent this phenomenon, install adiabatic glass wool insulation with
a thickness or 13/32 to 13/16 inches thick. Also, install glass wool
insulation on all indoor unit that are located in the ceiling plenum.
Drain Piping Insulation
Drain piping must have insulation a minimum of 7/32 inches thick.
Liquid Piping
Connection
Clamp for Insulation
(Field-Supplied)
Insulation
(Field-Supplied)
Vapor Piping Connection
Insulation for Refrigerant Piping
(Field-Supplied)
Ensure no gaps are present.
Insulation for Refrigerant Piping
(Field-Supplied)
Insulation for Field-Installed Piping
(Field-Supplied)
Overlap the Insulation at the
Connection
Multi F and Multi F MAX Indoor Unit Engineering Manual
88 | DUCT (LOW STATIC)
Due to our policy of continuous product innovation, some specications may change without notication.
• Follow manufacturer’s circuit diagrams in the technical manuals.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate.
• Confirm cable thickness specifications.
• 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.
• Loose wiring may cause unit to malfunction, overheat, and catch fire, resulting in severe injury or death.
Note:
• Terminal screws may become loose during transport. Properly tighten the terminal connections during installation.
A voltage drop may 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.
Connecting the Power Wiring and Communications Cable
1. Insert the power wiring / communications cable from the outdoor unit or branch distribution unit (Multi F MAX systems only)
through the side of the indoor unit. Pass the wiring through the
designated access holes to prevent damage. To prevent electromagnetic interference and product malfunction, leave a space
between the power wiring and communications cable outside of
the indoor unit.
2. Connect each wire to its appropriate terminal on the indoor unit
control board. Verify that the color and terminal numbers from
the outdoor unit or branch distribution unit (Multi F MAX systems
only) wiring match the color and terminal numbers on the indoor
unit.
3. Secure the power wiring / communications cable with the cable
restraint.
Figure 115:Indoor Unit to Outdoor Unit / Branch Distribution Unit
(Multi F MAX systems only) Power Wiring / Communications Cable
Connections.
Ceiling-Concealed Duct (Low Static)
4. Screw the steel clamp to the inside of the control panel.
• Place the wiring / cables in the clamp and tighten the plastic clamp to an open surface of the control panel.
• When clamping, do not apply force to the wiring connections.
• Neatly arrange the wiring, do not catch the wiring in the electric box cover, and ensure the cover firmly closes.
5. Fill in any gaps around the wiring access hole with sealant to prevent foreign particles from entering the indoor unit.
Using a Conduit
1. Remove the rubber stopper on the indoor unit. Pass the power
wiring / communications cable through the conduit, the conduit
mounting plate, and to the control panel of the indoor unit.
2. Connect the power wiring / communications cable to the indoor
unit terminal block.
3. Screw the conduit mounting plate to the indoor unit.
4. Tighten the conduit and the conduit mounting plate together.
Due to our policy of continuous product innovation, some specications may change without notication.
Ceiling-concealed duct (low static) indoor units include an LG-supplied wired controller
(AKB72955816)1, but other optional LG-supplied wired controllers are available. The
wireless handheld controller (Model No. PQWRHQ0FDB) is also an optional
accessory with use of the wired controller.
Each function will display on the LED for about three (3) seconds when the power is rst cycled on.
1
Simple Mode Controllers for the ceiling-concealed duct (low static) indoor units are also referenced by Model No. PQRCVCL0QW.
Wired Controller Connections
Controllers can connect to the 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.
Figure 118:PZCWRC1 LG Wired Remote Extension Cable.
Wired Controller
Figure 117:AKB729558161 Wired Controller.
2. Field-supplied controller cable that connects to the indoor unit
terminal block (must be at least UL2547 or UL1007, 22 AWG,
two-core, one-shield core, at least FT-6 rated if local electric and
building codes require plenum cable usage).
Multi F and Multi F MAX Indoor Unit Engineering Manual
When using eld-supplied controller cable, make sure to connect
the yellow to yellow (communications wire), red to red (12V power
wire), and black to black (ground wire) terminals from the remote
controller to the indoor unit terminal blocks.
Due to our policy of continuous product innovation, some specications may change without notication.
Figure 119:Wired Controller Connections on the Indoor Unit
Terminal Block.
DUCT (LOW STATIC) INDOOR UNITS
Top
WallWa ll
WallWall
Installing the Controller
Removing the Controller
4 to 5 feet
above the floor
NO
NO
NO
YES
Remote Controller
TEMP
Remote Controller
TEMP
Re
m
ot
e
C
o
n
t
r
ol
l
er
TEMP
MULTI
F
MAX
MULTI
F
Installation and Best Layout Practices
Hanging the Wired Controller
1. The controller wiring / cable can be installed in one of three direc-
tions: top, back, or on the right side. If top or right side installation
is desired, remove cable guide grooves on the controller, and
then position wiring / cable on applicable side.
2. Choose and mark the area of installation, and then screw the wall
plate into place (using the provided parts). Install the controller
wall plate to fit the electrical box if one is present. Ensure that no
gaps exist between the wall plate and the wall itself.
3. Arrange wiring / cables so as not to interfere with the controller
circuitry. Position the wired controller on the wall plate. Snap into
place by pressing the bottom part of the wired controller onto
the wall plate. Make sure that no gaps exist between the wired
controller and the wall plate on all sides.
4. To remove wired controller from the wall plate, insert a screw-
driver into the two holes at the bottom. Twist screwdriver to
release controller. Do not damage the controller components
when removing.
Figure 120:Removing the Cable Guide Grooves.
Top
Back
Figure 121:Attaching the Wall Plate.
Right
Side
Figure 122: Installing / Removing
the Controller.
Right
Side
Ceiling-Concealed Duct (Low Static)
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. For applicable indoor units, an optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in
conjunction with a wired controller thermistor as previously described.
Figure 123:Proper Location for the Wired Controller.
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
Due to our policy of continuous product innovation, some specications may change without notication.
To provide a required air flow rate that accounts for the external static pressure change, follow the steps
below.
1. To access system installer setting mode, press and hold the temperature increase and mode selection
buttons simultaneously for approximately three (3) seconds. Choose setting code value “06” by pressing the mode selection button.
2. Use the temperature increase and decrease buttons to select the
desired setting value.
Setting Values
01 : V-H
02 : F-H
03 : V-L
04 : F-L
3. Press the on / off button to save the established settings.
4. To deactivate system installer setting mode after the settings have been established, press and hold
the temperature increase and mode selection check buttons simultaneously for approximately three
(3) seconds. If a button is not pressed for more than 25 seconds, the system installer setting mode
will automatically deactivate.
To assign an air flow for each fan speed, follow the steps below.
1. To access system installer setting mode, press and hold the temperature increase and mode selection
buttons simultaneously for approximately three (3) seconds. Choose setting code value “03” by pressing the mode selection button.
2. Use the fan speed button to select the desired fan speed. ( Lo→Med→Hi will display on the LED).
3. Use the temperature increase and decrease buttons to select the desired external static
pressure setting value (thereby assigning the respective airflow). External static pressure value range:
0~255; the value will display near the lower right corner of the LED.
4. Press the on / off button to save the established settings.
5. To deactivate system installer setting mode after the settings have been established, press and hold
the temperature increase and mode selection check buttons simultaneously for approximately three
(3) seconds. If a button is not pressed for more than 25 seconds, the system installer setting mode
will automatically deactivate.
• A certified technician must set the external static pressure value(s). If the external static pressure is set incorrectly, the system may
malfunction.
• Do not alter the external static pressure value that corresponds to each air flow level.
• External static pressure value can vary depending on the indoor unit.
• If by pressing the fan speed button during external static pressure setup, the fan speed is raised to the next level, the air flow value of
the previous fan speed will be maintained (external static pressure setting value is saved).
CEILING-CONCEALED
DUCT (HIGH STATIC)
INDOOR UNIT DATA
“Mechanical Specifications” on page 95
“General Data / Specifications” on page 96
“Dimensions” on page 97
“Cooling Capacity Table” on page 98
“Heating Capacity Table” on page 99
“External Static Pressure” on page 100
“Acoustic Data” on page 100
“Refrigerant Flow Diagrams” on page 101
“Wiring Diagram” on page 102
“Factory Supplied Parts and Materials” on page 103
“Installation and Best Layout Practices” on page 104
MULTI
F
MAX
MULTI
F
DUCT (HIGH STATIC) INDOOR UNITS
Mechanical Specications and Features
Ceiling-Concealed Duct (High Static)
Indoor Unit
General
All LG indoor units are factory assembled, wired, piped, and provided
with a control circuit board, fan, and motor. Ceiling-Concealed Duct
(High Static) units are designed for high-speed air volume against an
external static pressure up to 0.78″WG for the 24,000 Btu/h model;
up to 0.55″WG for the 36,000 Btu/h model.
Coil
Indoor unit coils are factory built and are comprised of aluminum fins
mechanically bonded to copper tubing. Each unit has two rows of
coils, which are pressure tested at the factory. Each unit is provided
with a factory installed condensate drain pan below the coil.
Refrigerant System
System is designed for use with R410A refrigerant. The refrigeration
circuit is pressure-tested at the factory and shipped with a holding
charge of helium gas. Refrigerant pipe connections are 45° flare,
and all refrigerant lines from the outdoor unit to the indoor units must
be field insulated.
Electrical
Each indoor unit is designed to operate using 208–230/60/1 power
with voltage variances of ±10%.
Casing
The casing is designed to mount fully concealed above a finished
ceiling. Casing is manufactured of galvanized steel plate. Cold surfaces of the unit are covered internally with a coated polystyrene insulating material, and covered externally with sheet insulation made
of ethylene propylene diene monomer (M-Class) (EPDM). External
insulation is plenum rated and conforms to ASTM Standard D-1418.
Hanger brackets are included on the casing to support the weight on
four corners. Unit has a front horizontal supply air discharge outlet,
and one dedicated rear horizontal return air inlet.
Fan Assembly and Control
The units have two direct-drive, Sirocco fans made of high strength
ABS GP-2200 polymeric resin that are statically and dynamically
balanced. The fans are mounted on a common brushless digitally
controlled (BLDC) motor 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. The indoor fan has
Low, Med, High, and Auto settings for Cooling mode; and has Low,
Figure 127: Ceiling-Concealed Duct (High Static) Indoor Unit.
Med, High, and Auto settings for Heating mode. Each of the settings
can be field-adjusted from the factory setting (RPM / ESP). The Auto
setting adjusts the fan speed based on the difference between the
controller setpoint and space temperature.
Air Filter
Return air is filtered with a factory-supplied, removable, washable
filter accessible from the rear of the indoor unit. High efficiency air
filter options include a return filter box and an LG / Dynamic supplied
air cleaner (both sold separately).
Microprocessor Control
The unit is provided with an integrated control panel to communicate
with the outdoor unit. All unit operation parameters are stored in nonvolatile memory resident on the unit microprocessor. The microprocessor controls space temperature through using the value provided
by the temperature sensor within the indoor unit. The microprocessor
control will activate indoor unit operation when the indoor room temperature falls below or rises above a setpoint temperature, at which
point, a signal is sent to the outdoor unit to begin the appropriate
mode. The microprocessor will also provide self-diagnostics and auto
restart functions. A field-supplied four-wire power / communications
cable must be installed to connect the indoor unit(s) to the outdoor
unit.
Controls
The indoor unit is supplied with an LG wired controller. Communication between the indoor units and the outdoor unit is accomplished
through 18 AWG, four-core, stranded and shielded power / communication cable.
Condensate Lift/Pump
The indoor unit is provided with a factory installed and wired internal
condensate lift/pump capable of providing a minimum 27.5 inch lift
from the bottom surface of the unit. Drain pump has a safety switch
to shut off the indoor unit if the condensate rises too high in the drain
pan.
Ceiling-Concealed Duct (High Static)
Features
• Inverter (Variable speed fan)
• Internal drain pump
• Control lock function
• Auto operation
• Auto restart operation
• Dehumidifying function
• Two thermistor control
• External static pressure control
Due to our policy of continuous product innovation, some specications may change without notication.
46-17/32 x 11-23/32 x 17-23/3246-17/32 x 11-23/32 x 17-23/32
Net Unit Weight (lbs.)
Shipping Weight (lbs.)
Power Wiring / Communications Cable (No. x AWG)5
Heat Exchanger
(Row x Column x Fin / inch) x Number
Piping
Liquid (in.)
Vapor (in.)
Drain O.D. / I.D. (in.)
Multi F and Multi F MAX Indoor Unit Engineering Manual
1
Nominal capacity is rated 0 ft. above sea level with corresponding refrigerant piping length in
accordance with standard length of each outdoor unit and a 0 ft. level difference between outdoor and
indoor units. All capacities are net with a combination ratio between 95 – 105%.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF
wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF
wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2
This unit comes with a dry helium charge.
24,00036,000
27,00040,000
57-7757-77
59-8159-81
SiroccoSirocco
154 x 1350 x 1
688 / 618 / 5301,130 / 953 / 706
0.390.39
0.780.55
R410AR410A
EEVEEV
208-230, 1, 60 208-230, 1, 60
0.91.4
37 / 36 / 3544 / 42 / 40
8091
91101
4 x 184 x 18
(2 x 12 x 21) x 1(3 x 12 x 21) x 1
1/43/8
1/25/8
1-1/4, 11-1/4, 1
3
Acceptable operating voltage: 187V-253V.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and are the
same in both cooling and heating mode. These values can increase due to ambient conditions during
operation.
5
All power wiring / communications cable to the IDUs be minimum 18 AWG, 4-conductor, stranded,
shielded or unshielded (if shielded, must be grounded to chassis at ODU only) and must comply with
applicable local and national codes.
96 | DUCT (HIGH STATIC)
Due to our policy of continuous product innovation, some specications may change without notication.
Table 50:Multi F Ceiling-Concealed Duct (High Static) Indoor Units Cooling Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMHN240HV
24,000
LMHN360HV
36,000
Multi F and Multi F MAX Indoor Unit Engineering Manual
TC = Total Capacity (kBtu/h).
SHC: Sensible Heat Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB), and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
The shaded table columns and rows indicate reference data. When operating at this temperature, these values can be different if the system is not running consistently.
Table 51:Multi F Ceiling-Concealed Duct (High Static) Indoor Units Heating Capacity Table.
Model No. /
Nominal Capacity
of Indoor Unit
(Btu/h)
LMHN240HV
24,000
LMHN360HV
36,000
TC = Total Capacity (kBtu/h).
Nominal capacity as rated 0 ft. above sea level and a 0 ft. level difference between outdoor and indoor units. Corresponding refrigerant piping length is accordance with standard length of each outdoor unit.
Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet bulb (WB), and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Outdoor Air Temp.Indoor Air Temp. °F DB
°F DB°F WB
0-0.413.8913.7013.5713.5013.3012.72
54.515.6515.4615.3315.2615.0714.48
10917.4117.2217.0917.0216.8316.24
171519.7619.5719.4319.3719.1718.55
201920.6420.4520.3220.2520.0519.37
252322.1121.9121.7821.7221.5220.74
302823.3823.1823.0522.9922.7922.11
353224.6524.4624.3324.2624.0723.48
403625.7925.6025.4725.4025.2124.62
454126.9326.7426.6126.5426.3525.76
474327.3927.2027.0727.0026.8026.22
504627.8327.6427.5127.4427.2426.58
555128.5728.3728.2428.1727.9827.20
605628.5728.3728.2428.1727.9827.32
635928.5728.3728.2428.1727.9827.39
686428.5728.3728.2428.1727.9827.51
0-0.420.5820.2920.1020.0019.7118.84
54.523.1922.9022.7122.6122.3221.45
10925.8025.5125.3125.2224.9324.06
171529.2828.9928.7928.7028.4127.48
201930.5830.2930.1030.0029.7128.70
252332.7532.4632.2732.1731.8830.72
302834.6434.3534.1534.0633.7732.75
353236.5236.2336.0435.9435.6534.78
403638.2137.9237.7337.6337.3436.47
454139.9039.6139.4239.3239.0338.16
474340.5840.2940.1040.0039.7138.84
504641.2340.9440.7540.6540.3639.38
555142.3242.0341.8441.7441.4540.29
605642.3242.0341.8441.7441.4540.47
635942.3242.0341.8441.7441.4540.58
686442.3242.0341.8441.7441.4540.76
616468707275
TCTCTCTCTCTC
Ceiling-Concealed Duct (High Static)
Due to our policy of continuous product innovation, some specications may change without notication.
• To get the desired air flow and external static pressure combination, use the setting value from the table. Using a setting value other
than that listed in the table will not provide the desired combination.
• Table data is based at 230V. Air flow rate varies according to voltage fluctuation.
• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 53:Sound Pressure Levels (dB[A]).
Model No.
LMHN240HV373635
LMHN360HV444240
Figure 130: Sound Pressure Level Diagrams.
Multi F and Multi F MAX Indoor Unit Engineering Manual
Sound Pressure Levels (dB[A]) (Cooling and Heating)
High Fan Speed
Medium Fan
Speed
Low Fan Speed
100 | DUCT (HIGH STATIC)
Due to our policy of continuous product innovation, some specications may change without notication.