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Due to our policy of continuous product innovation, some specications may change without notication.
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Hybrid Heat Pump (LG Outdoor Unit + A-Coil + Gas Furnace) Sales Guide
LG HEAT PUMP MECHANICAL SPECIFICATIONS
LG Heat Pump Outdoor Unit
The Single zone HVAC system is a variable capacity, direct
expansion (DX) heat pump system consisting of a single outdoor
unit and single indoor unit. The outdoor unit is equipped with a
single inverter compressor with provision to be connected to a
third-party A-Coil / gas furnace with piping and control wiring via a
communication kit (provided by LG; embedded in the outdoor unit) /
third-party thermostat. The outdoor unit includes an adapater kit for
either flare or braze piping connections.
The heat pump outdoor unit will be available in 208/230V, 60Hz,
1 phase and uses R410A refrigerant. All refrigerant piping from
outdoor unit to A-Coil are field installed / insulated.
Casing
The outdoor unit cabinet is made of pre-coated metal (PCM) with
removable front/side panels of the outdoor unit for access to internal
components. The outdoor unit cabinet is tested in accordance with
ASTM B-117 salt spray test procedure for a minimum of 1,000 hours.
All access panels are provided with gasket seals to minimize air
leakage. The unit case is designed to accept an internal, optional,
LG drain pan heater. The unit bears the CSA label. Unit breaker,
fuses, and / or disconnect are provided by others.
Microprocessor Control
Factory installed microprocessor controls in the outdoor unit perform
functions via communication kit to efficiently operate the single zone
system and communicate to a third party A-Coil via minimum 14
AWG, 3 conductor, stranded, shielded or unshielded communication
cable. If shielded, it must be grounded to chassis at ODU only.
The third-party gas furnace requires a separate power supply
of 115V, 60Hz, 1 phase. Follow instructions provided by the gas
furnace manufacturer.
Compressors
The 18,000 and 24,000 outdoor units are equipped with one
hermetically sealed, digitally controlled, inverter-driven twin rotary
compressor to modulate capacity (modulation in 1 Hz increments).
The 36,000, 42,000, and 48,000 Btu/h outdoor units are equipped
with one hermetically sealed, digitally controlled, inverter-driven
scroll compressor to modulate capacity (modulation in 1 Hz
increments).
Teflon coated bearings, overcurrent protection, and vibration
isolation are integrated with the compressor.
Frequency ranges for the 18,000 and 24,000 Btu/h outdoor units are:
Cooling: 15 to 80 Hz
Heating: 15 to 100 Hz
Frequency ranges for the 36,000, 42,000, and 48,000 Btu/h outdoor
units are:
Cooling: 10 to 120 Hz
Heating: 10 to 135 Hz
Controls
An LG wired controller cannot be used with the outdoor unit and
third-party A-Coil / gas furnace. A third-party thermostat that
supports dual-fuel function is required. The outdoor unit include an
embedded communication kit with a terminal block to connect to
the third-party wired thermostat and the third-party gas furnace. An
outdoor air sensor (field supplied) is required to sense the outdoor
air temperature for dual fuel system.
Condensate
The outdoor unit is designed for gravity draining of condensate.
Outdoor Unit Heat Pump Coil
Outdoor unit heat pump 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.
Figure 1: LG Hybrid Outdoor Unit Heat Pumps LUU360HV, LUU420HV,
LUU480HV with Nortek A-Coil / Gas Furnace.
For Nortek A-Coil and gas furnace specications, see Nortek
technical materials at www.nortekhvac.com.
LG Outdoor Unit
A-Coil
(Nortek)
Gas Furnace
(Nortek)
Third-Party
Thermostat