LG LC187HV, Engineering Manual, Page: 71 / 76

meCHaniCal SPeCiFiCationS
Four-Way ceiling cassette System
Figure 70: Four-Way Ceiling Cassette
System (LC367HV, LC427HV Models).
Coil
Outdoor Unit
Heat pump outdoor unit coils are made of nonferrous louvered
aluminum fins protected with an integral coil guard. The coil for each
outdoor unit has a minimum of 14 fins per inch (FPI); heat exchanger
has two rows. The coil fins have a factory applied corrosion resistant
GoldFin™ material with hydrophilic coating tested in accordance with
ASTM B-117 salt spray test procedure for a minimum of 1,000 hours.
Coils are factory tested to a pressure of 551 psig.
Indoor Unit
Indoor unit coils are factory built and are comprised of aluminum fins
mechanically bonded to copper tubing. Each indoor unit has a min-
imum of two rows of coils, which are pressure tested to 551 psig at
the factory. Each unit is provided with a factory installed condensate
drain pan below the coil.
Fans and motors
Outdoor Unit
The 1-1/2 and 2 ton outdoor units (LUU187HV, LUU247HV) include
one direct drive, variable speed propeller type fan with a horizontal
air discharge; the 3 and 3-1/2 outdoor units (LUU367HV, LUU427HV)
include two fans. Fan blades are made of Acrylonitrile Butadiene
Styrene (ABS) material, and have a Brushless Digitally Controlled
(BLDC) fan motor. The fan motor has inherent protection, perma-
nently lubricated bearings, and variable speed with a maximum
speed up to 950 rpm. Raised guards are provided to limit contact
with moving parts.
Indoor Unit
The indoor units have a single, direct-drive, turbo fan manufactured
of high-strength ABS HT-700 polymeric resin; the fans are statically
and dynamically balanced. The fan motor is brushless digitally con-
trolled (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 di-
rect digital control algorithm that provides pre-programmed, field-se-
lectable fixed or auto fan speeds in the Heating and Cooling modes.
The indoor fan has Low, Med, High, Power Cool and Auto settings
for Cooling mode; and has Low, Med, High, and Auto settings for
Heating mode. Auto setting adjusts the fan speed based on the
difference between the controller set-point and space temperature.
air Filter -
indoor unit
Return air is filtered with a
factory-supplied, removable,
washable filter accessible
from the bottom of the unit. A
plasma filter is also available
as an optional accessory.
electrical
The system was designed to
operate using 208–230/60/1
power with voltage varianc-
es of ±10% and includes
overcurrent protection.
The indoor unit is powered
through the outdoor unit.
Controls
Indoor and outdoor units are
factory wired with necessary
electrical control components, printed circuit boards, thermistors,
sensors, terminal blocks, and lugs for power wiring. Factory installed
microprocessor controls in the outdoor unit and indoor unit shall
perform functions to efficiently operate the single zone system,
communicating via an 18 AWG four stranded and shielded conductor
power/transmission cable. Microprocessor-based algorithms provide
component protection, soft-start capability, refrigeration system
pressure, temperature, defrost, and ambient control. System can be
operated through a handheld wireless controller supplied with the
four-way ceiling cassette indoor unit.
Condensate lift/Pump
The indoor unit is provided with a factory installed and wired conden-
sate lift/pump capable of providing a minimum 31-1/2 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.
Due to our policy of continuous product innovation, some specifications may change without notification.
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Electrical Connections and Mechanical Specs