LMCN078HV Engineering Manual

STD. WALL-MOUNTED | 73
Low Wall Console
Due to our policy of continuous product innovation, some specications may change without notication.
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MULTI
F
MAX
MULTI
F
LOW WALL CONSOLE INDOOR UNITS
Mechanical Specications and Features
Low Wall Console Indoor Units
General
All LG indoor units are factory assembled, wired, piped, and provided
with a control circuit board, fan, and motor. Low Wall Console units
have a sound rating no higher than 44 dB(A) as tested per KSA0701
ISO Low 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 refrig-
eration 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 sepa-
rate 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 Low Wall Console unit has a case with a beige-white panel. It
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, turbo 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 Low
Wall Console 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
The return air inlet
has a factory-
supplied primary
removable, washable
filter. The filter is ac-
cessed 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 up and down
for uniform air distribution. Side to side control is manual.
Microprocessor Control
The indoor unit has an integrated control panel to communicate with
the outdoor unit. All unit operation parameters are stored in non-vola-
tile memory resident on the unit microprocessor. The microprocessor
controls space temperature through using the value provided by the
temperature sensors within the indoor unit. The microprocessor con-
trol will activate indoor unit operation when the indoor room tempera-
ture 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 an integral infrared sensor to communi-
cate 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 14 AWG, four-core, stranded and
shielded power / communication cable. The indoor unit has an option
for 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 Aqua-
Guard
®
AG-9300-LG condensate sensor.
• Inverter (Variable speed fan)
• Comfort Air
• Jet cool/Jet Heat
• Group control
• Auto operation
• Auto restart operation
• Optional wi-fi
• Self-diagnostic function
• Wireless LCD remote control included
Features
Figure 95: Multi F Low Wall Console Indoor Unit.