ART COOL
TM
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Art Cool
TM
Gallery
Due to our policy of continuous product innovation, some specifications may change without notification.
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LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ART COOL
TM
GALLERY
Mechanical Specifications
Casing
Units are designed to mount on a vertical surface and come com-
plete with an installation mounting guide and a separate hanging
bracket. The unit case is manufactured with coated metal. Cold
surfaces are covered with a coated polystyrene insulating material.
Finish
The unit case has a light gray / silver matte finish. The front surface
of the unit has a flat glass panel and frame that can accommodate a
20″ x 20″ photograph, picture or artwork.
Fan Assembly and Control
The indoor unit has a single, direct-drive, turbo fan. The fan wheel
is made of high strength ABS HT-700 polymeric resin. The fan motor
is a Brushless Digitally Controlled (BLDC) design with permanently
lubricated and sealed ball bearings. The fan motor includes thermal,
overcurrent and low RPM protection. The fan/motor assembly is
mounted on vibration attenuating rubber grommets. The fan impeller
is statically and dynamically balanced. The fan speed is controlled
using a microprocessor-based, direct digital control algorithm that
provides a high fan speed in cooling thermal ON and low fan speed
in cooling thermal OFF, high fan speed in heating thermal ON and
fan off in heating thermal OFF. The fan speeds can be field adjusted
between low, medium, and high speeds. The fan speed algorithm
provides a field selectable, fixed-speed or auto-speed setting that
adjusts the fan speed to simulate natural airflow.
Air Filter
Return air is filtered with a removable, washable filter with anti-fun-
gal treatment. Filter access is from the front of the unit without the
use of tools.
Airflow Guide Vanes
The indoor unit is provided with motorized sweeping guide vanes
that automatically change the direction of airflow from side-to-side
and up-and-down.
Microprocessor Control
The unit is provided with an integrated microprocessor controller ca-
pable of performing functions necessary to operate the system with-
out the use of a wall-mounted controller. A temperature thermistor is
factory mounted in the return air stream. All unit operation param-
eters, excluding the operating schedule, are stored in non-volatile
memory resident on the unit microprocessor. Operating schedules
are stored in select models of the optional, wall-mounted, local or
central controllers. The field-supplied communication cable between
the indoor unit(s) and outdoor unit is to be a minimum of 18 AWG,
2 conductor, stranded, and shielded cable (RS-485), terminated via
screw terminals on the control boards. The microprocessor control
provides the following functions: auto addressing, self-diagnostics,
auto restart following power restoration, test run, and will operate the
indoor unit using one of five operation modes:
1. Auto Changeover (Heat Recovery only)
2. Heating
3. Cooling
4. Dry
5. Fan Only
For Heat Recovery systems the Auto Changeover setting automati-
cally switches control of the indoor unit between Cooling and Heating
modes based on space temperature conditions. For Heat Pump
systems, heated or cooled air delivery
is dependent upon outdoor unit
operating mode.
In Heating mode, the microprocessor
control will activate indoor unit opera-
tion when the indoor room temperature
falls below set-point temperature.
At which point, a signal is sent to
the outdoor unit to begin the heating
cycle. The indoor unit fan operation
is delayed until coil pipe temperature
reaches 76°F. Significant airflow is
generated when pipe temperature
reaches 80°F. A field-selectable option maintains fan operation for
30 minutes following cooling cycle operations. The unit is equipped
with an infrared receiver designed to communicate with an LG
wireless remote controller. In lieu of wireless remote or factory return
air thermistor, screw terminals on the microprocessor circuit board
accommodate various models of wall-mounted local controllers.
The unit microprocessor is capable of accepting space temperature
readings concurrently or individually from either:
1. Wall-mounted wired controller(s)
2. Factory-mounted return air thermistor
A single indoor unit has the capability of being controlled by up to
two local wired controllers. The microprocessor controls space tem-
perature using the value provided by the temperature sensor sensing
a space temperature that is farthest away from the temperature
set-point. The microprocessor control provides a cooling or heating
mode test cycle that operates the unit for eighteen (18) minutes
without regard to the space temperature. If the system is provided
with an optional wall-mounted local or central controller, displayed di-
agnostic codes are specific, alpha-numeric, and provide the service
technician with a reason for the code displayed.
Handling Condensate
The unit is designed for gravity draining of condensate. LG provides
a factory insulated flexible drain hose. If condensate lift/pumps are
needed for the application, they are to be field provided.
Condensate Drain Pan
The condensate drain pan is constructed of expandable polystyrene
resin (EPS).
Coil
The indoor unit coil is constructed with grooved design copper tubes
with slit coil fins, two (2) rows, eighteen (18) fins per inch.
Controls Features
• Auto changeover (Heat
Recovery only)
• Auto operation
• Auto clean (coil dry; requires
wireless controller)
• External on/off control
• Dual thermistor control
• Dual setpoint control*
• Filter life and power consump-
tion display*
• Group control
• Forced operation
• Hot start
• Self diagnostics
• Timer (on/off)
• Weekly schedule
• Auto direction/swing (up/down)
• Fan speed control
• Jet cool (fast cooling)
*To enable Generation 4 features,
outdoor unit DIP Switch No. 3
must be set to ON. Please refer
to the Multi V 5, Multi V IV, Multi
V Water IV, Multi V S Engineering
Manual for additional information.
