Engineering Manual

ART COOL Mirror 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. ART COOL Mirror
Wall-Mounted indoor units have a sound rating no higher than 39
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, protrud-
ing no more than ten (10) 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
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strength ABS plastic. The fan motor is brushless digitally controlled
(BLDC) with permanently lubricated and sealed ball bearings. The
fan and 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,
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modes. For Art Cool Mirror Wall-Mounted 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
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Air Filter
Return air inlet has a factory-supplied primary removable, washable
filter. The unit is also equipped with a secondary 3M HAF filter. Fil-
ters are accessed from the front of the unit without the use of tools.
Airflow Guide Vanes
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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 com-
municate 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.
Condensate
The unit is designed for gravity draining of condensate and includes
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Unit includes a connection that is compatible with the AquaGuard
®
AG-9300-LG condensate sensor.
Figure 1: Multi F Art Cool Mirror Wall-Mounted Indoor Unit.
ART COOL MIRROR INDOOR UNITS
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• Inverter (Variable speed fan)
• Chaos swing
• 3M HAF filter
• Jet cool
• Group Control
• Self-cleaning indoor coil
• Auto operation
• Auto restart operation
• Dehumidifying function
• Self diagnosis function
• Wireless LCD remote control included; wired
thermostat available (sold separately)
Features
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10 | ART COOL MIRROR
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F