Aaon RZ-090 User Manual
PACKAGED ROOFTOP UNITS, HEAT PUMPS
AND OUTDOOR AIR HANDLING UNITS
RZ
Features:
• Air-cooled condenser, water-cooled
condenser, or evaporative-cooled
condenser packaged rooftop units from
55-240 tons
• Water-source and geothermal heat
pump options
• Chilled water or non-compressorized
DX air handling units, from 8,90075,500 cfm
• R-410A scroll compressors or R-134a
oil-free magnetic bearing Turbocor
centrifugal compressors
• Double wall rigid polyurethane foam
insulated cabinet construction
• Optional walk-in compressor and
control service vestibule
• Unit access doors with full length
hinges and lockable handles
• Spring isolated direct drive backward
curved plenum supply fans
• Blow-through and draw-through fan
configurations
• Electric, steam, hot water, indirect fired
gas, and direct fired gas heating
• Power exhaust and power return
options
• Factory installed AAONAIRE sensible
and total energy recovery wheels
• Humidity control features including
return air bypass and modulating hot
gas reheat
• Option boxes available for field installed
components
Series
Makeup Air Applications
Up to 100% Outside Air
Application Flexibility
Minimizes Installation Time and Reduces Cost
Dehumidification
and Filtration Capabilities
Easy to Install and Service Factory Installed or Customer
Specific Control Options
Rooftop Conditioners
RZ
Rooftop/Air Handling Units
AAON continuously strives to satisfy the
dynamic industry requirement for large
energy ecient packaged rooftop
equipment. The RZ Series design
incorporates the AAON long term
commitment and dedication to excel as
the premier manufacturer of rooftop
equipment. RZ Series units are available
in multiple congurations and include
many standard features that make AAON
synonymous with quality products for any
application.
Series
Superior Features
• Access doors are provided in areas subject to scheduled maintenance. Walk-in
doors are constructed with stainless steel piano hinges, perimeter gaskets, and
zinc cast lockable handles that operate from a single point.
• Aluminum tread plate oor covering in appropriate equipment access areas for
improved durability and safety.
• Selectable number of draw-through or blow-through direct drive backward
curved plenum fans allows design exibility for quieter applications and
redundancy for applications where unit up time is critical.
• Microprocessor controls are compatible with BACnet®, Modbus, LonTalk®, and
Fox protocols for integration with a variety of controls systems.
• Corrosion resistant polyurethane paint exceeds a 2,500-hour salt spray test.
• Refrigerant circuits are provided with removable core lter driers and isolation
valves for ease of service; no need to cut the refrigerant line as is done with
brazed in lter driers.
• Unit specic color-coded wiring diagrams are provided in point-to-point and
ladder form and are laminated and permanently axed inside the control
compartment for ease of service.
• Factory installed, sensible or enthalpy controlled , AMCA Certied Class 2 low
leakage gear driven economizer dampers allows for free cooling.
H
L
Full Featured, Energy Efficient,
Packaged Rooftop Units to Meet
Today’s Requirements!
Premier Options
• Staged or VFD driven variable speed scroll compressors are available for load
matching cooling and increased part load eciency.
• Oil-Free magnetic bearing R-134a Turbocor centrifugal compressor
option provides load matching cooling capacities with quiet, energy
ecient operation.
• Optional walk-in compressor and control service vestibule provides
complete access to all components.
• Marine service lights for quick and convenient maintenance.
• Compressor isolation valves are available for improved service eciency.
• Double pane viewing windows can be installed in all doors where
viewing of operating equipment or interior cabinet is needed.
• Multiple methods of humidity control including: High Capacity
Cooling Coils, Return Air Bypass, and Modulating Hot Gas Reheat
Humidity Control which provides ecient dehumidication, even with
low sensible heat loads, without the temperature swings common with
on/o reheat systems.
• Multiple high eciency ltration options, including pleated, cartridge, or
bag type, with up to a MERV 14 eciency rating.
W
• Factory installed total and sensible AAONAIRE energy recovery wheels
save cooling and heating dollars. Return fans are available for high return
static applications.
• Polymer e-coated coils are available to extend the life of the coils and
protect them in corrosive environments.
• Interior corrosion protection option protects interior components of the
unit in corrosive environments.
• Option boxes are segments of the unit that can be left empty from the
factory so that components may be installed in the eld without the
trouble of installation and service in a crowded cabinet.
RZ
Rooftop/Air Handling Units
Series
Air-Cooled, Water-Cooled, or Evaporative-Cooled Condensers
Air-Cooled Condensing
Microchannel condenser coils are more ecient due to their enhanced
heat transfer. They are also up to 30 percent lighter and use less refrigerant
than traditional n and tube coils. The outward facing coils are intrusion
protected with perforated metal screens. All condenser coils are designed for
minimum 10°F of refrigerant sub-cooling. VFD can be installed on the
condenser fans for head pressure control and greater operating
temperature range, as well as to provide reduced sound levels at o design
ambient temperatures. All condenser fans are direct drive, axial ow propeller
type, and discharge vertically.
Evaporative-Cooled Condensing
When compared to air-cooled designs these units deliver both
outstanding energy eciency and signicant operational cost
savings. Energy cost reduction can be 20% to 40% annually dependent on
geographic location. Geographic locations that typically require a central
chiller and cooling tower are considered primary locations for application of
the evaporative-cooled condenser RZ Series rooftop unit. Factory installed
AAON evaporative-cooled condenser, with air-cooled de-superheater
and variable frequency drive controlled fans, can be 20-40% more energy
ecient than a comparable air-cooled condenser, can use 22-100% less
water than a conventional evaporative-cooled condenser, and require
22-100% less chemical usage than a conventional evaporative cooled
condenser. Interior of evaporative-cooled condenser is constructed of 304
stainless steel and other non-corrosive materials. De-superheater coils include
polymer e-coating for corrosion protection.
Water-Cooled Condensing
The energy ecient water-cooled units are of particular application value
when there exists an accessible water source or when cooling tower water is
available. The standard water-cooled RZ Series units include these features:
• Shell and tube refrigerant-to-water heat exchangers.
• Each heat exchanger is provided with are movable and cleanable type
basket lter.
• Heat exchanger piping connections are made within the condensing
section of the roof top unit.
Air Handling Units
The RZ Series also ts the job when units are required without compressors.
The unit will be built without a condensing section and walk-in compressor
and control vestibule. All other features and options are readily available. Air
handling units may include the following options:
• Supplied with a DX coil and expansion valves.
• Supplied with a chilled water coil in 4, 6, or 8 rows.
• The unit may be specied with any of the heating options to provide a
year-round rooftop heating and cooling package.
RZ
Model
055
065
075
090
105
120
130
140
090
120
150
180
181
240
Condenser Type
Air-Cooled,
Water-Cooled
Evaporative-Cooled
or Air Handling Unit
Evaporative-Cooled
Compressor Type Height
R-410A Scroll
R-134a Centrifugal
Turbocor
Compressors/
Circuits
4/2
1/1
2/1
Width
142
142
104
104
Length
Length varies
depending on
options selected.
Length varies
depending on
options selected.
All dimensions are in inches.
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