Dedicated Outdoor Air Unit 5
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 (Relief) Air.
Coils - Evaporator coil (optional)
Condenser coil (optional, packaged DX only)
Indoor coil (optional, air-source heat pump only)
Outdoor coil (optional, air-source heat pump only)
Water coil (optional)
Reheat coil (optional)
Compressors - Each unit having packaged DX will
have either one, two or four refrigerant compressors.
Optionally, one of the compressors may be a digital or
inverter scroll type compressor. Air-source heat pump
units will have one inverter scroll compressor and may
contain a second staged compressor.
Dampers - Motorized intake air damper, optional
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 (not
shown) is available on the units. It has its own control
panel and may require a separate power supply. See
unit-specific wiring diagram.
Supply Filters - All housings are available with a filter
bank depth of either 2 or 4-inch.
Indirect Gas-Fired Furnace - Furnace model PVG is
available on housing -112, and -212. Housing -311 uses
furnace model PVF 200-600 or model HMA 700-800.
Housing -352 use furnace model HMA 600-1200.
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; housing size -311 and -352
will include four 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.
Air-Source Heat Pump - Units having an air-source heat
pump will include either one or two compressors, an
indoor and outdoor coil, and all required components.
Air-source heat pump units are charged with R410A
refrigerant. Do not use tools or parts designed for other
refrigerants on these units.
Split DX - The unit may be ordered with a split DX
system for connection to a building cooling system.
Thermal expansion valve (TXV) is field-provided.
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.
Subassemblies
Plenum-Type
Supply Air Blower
Low Sound Condenser Fans
(optional)
Indirect Gas-Fired Furnace
(optional)
Packaged DX
Compressors
(optional)
Condenser Coils
(optional)
Outdoor Air
Damper
Coils
(optional)
Recirculating
Damper
Main Control
Center
Furnace Vest Plate
and
Furnace Control Center
(optional)
Outdoor Air Filters
(pre-wheel)
Weatherhood Filters
(metal mesh)
Energy Wheel (VXE)
(optional)
Plenum-Type
Exhaust Air Blower
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