Subassemblies - LG AR-DR12-05A Installation And Operation Manual

SUBASSEMBLIES

Blower
Either one or two plenum-type fans. All units are equipped with a plenum fan for Supply Air and a second may be selected for Exhaust (Re-
lief) Air.
Coils
• Evaporator coil (optional)
• Condenser coil (optional, packaged DX only)
• Water coil (optional)
• Reheat coil (optional)
Compressors
Each unit having packaged DX will have one or two refrigerant compressors. One of the compressors will be a digital scroll type compressor.
Dampers
Motorized intake air damper, motorized recirculating damper. Optional return air damper. Optional gravity-type exhaust damper.
Optional Barometric Relief Damper
Used during economizer mode of the unit when building pressure increases, relief damper will open due to over pressurization.
Electric Heater
An SCR controlled electric heater is available on the units. It requires a separate power supply and has its own control panel. See unit-
specific wiring diagram.
Filters
2-inch thick metal mesh filters in the outdoor weatherhood intake, 2-inch thick pleated paper MERV 8 (standard) or MERV 13 filters in the
air stream. Optional 4-inch thick filter bank with a 2-inch thick MERV 8 and 2-inch thick MERV 13 or a 4-inch thick MERV 14 pleated paper
supply filters.
Indirect Gas-Fired Furnace
Furnace model PVG is available on AR-DR12, AR-DE12, AR-DR22, and AR-DE22.
Packaged DX System
Any unit may be ordered with a packaged DX system. Housing size 112 will include either one or two compressors; housing size
212 will include two compressors; a condenser coil(s) and evaporator coil(s) and all required components. Units that have packaged DX are
charged with R410A refrigerant. Do not use tools or parts designed for other refrigerants on these units.
Vestibule
Some units may be ordered with a factory- assembled vestibule that is to be field-attached to the side of the unit. See lifting instructions.
Due to our policy of continuous product innovation, some specifications may change without notification.
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