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Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
DUCTED | 77
Electrical Connections and Mechanical Specs
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 mini-
mum of three 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 9,000 Btu/h (LUU097HV) and 12,000 Btu/h (LUU127HV),
and 24,000 Btu/h (LUU247HV) outdoor units include one direct
drive, variable speed axial / propeller type fan with a horizontal air
discharge; the 36,000 Btu/h outdoor unit (LUU367HV) includes 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, permanently 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 9,000 Btu/h (LDN097HV4), 24,000 Btu/h (LHN247HV), and
36,000 Btu/h (LHN367HV) indoor units have two direct-drive, Sirocco
fans made of high strength ABS GP-2200 polymeric resin; the
12,000 Btu/h (LDN127HV4) has three direct-drive Sirocco fans. The
fans are statically and dynamically balanced, mounted on a com-
mon brushless digitally controlled (BLDC) motor, and 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, Med, High, and Auto settings for Heating mode. The Auto
setting adjusts the fan speed based on the difference between the
controller set-point and space temperature.
Air Filter -
Indoor Unit
The return air inlet on
the indoor unit includes a
factory-supplied remov-
able, washable filter that is
accessible from the back
of the unit. Options include
a return filter box that
holds a field-provided high
efficiency one or two inch
MERV-rated filters, and a
LG-supplied air cleaner
(each sold separately).
Electrical
The system was de-
signed to operate using
208–230/60/1 power with
voltage variances 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 micro-
processor controls in the outdoor unit and indoor unit shall perform
functions to efficiently operate the single zone system, communi-
cating via an 18 AWG four stranded and shielded conductor power/
transmission cable. Microprocessor-based algorithms provide com-
ponent protection, soft-start capability, refrigeration system pressure,
temperature, defrost, and ambient control. System can be operated
through a simple wired remote controller supplied with the duct (high
static) indoor unit.
Condensate Lift/Pump
The indoor unit is provided with a factory installed and wired
condensate lift/pump capable of providing a minimum 27-9/16 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.
Figure 71: Ceiling-Concealed Duct
(High Static) System (LH367HV Model).
MECHANICAL SPECIFICATIONS
Ceiling-Concealed Ducted System
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