LG LH247HV Engineering Manual page 67

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 two-ton outdoor unit (LUU247HV) includes one direct drive,
variable speed propeller type fan with a horizontal air discharge; the
three-ton 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 indoor unit has two direct-drive, Sirocco fans made of high
strength ABS GP-2200 polymeric resin; the fans are statically and
dynamically balanced. The fans are mounted on a common brush-
less digitally controlled (BLDC) motor, and is mounted on vibra-
tion-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
removable, 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).
meCHaniCal SPeCiFiCationS
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
ceiling-concealed duct (High Static) System
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, communicating via an
18 AWG four stranded and shielded conductor power/transmission
cable. Microprocessor-based algorithms provide component protec-
tion, 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 68: Ceiling-Concealed Duct
(High Static) System (LH367HV Model).
duct (HIgH StatIc) | 67