RZ Series

Applications

• Air-cooled condenser or water-cooled condenser packaged rooftop units from 45-240 tons.
• Evaporative condenser packaged rooftop units from 51-261 tons.
• Chilled water or non-compressorized DX air handling units, from 7,500-80,000 cfm.
• Variable speed R-410A scroll compressors on all units for load matching cooling and improved part load efficiency.
• Selectable number of draw-through or blow-through direct drive welded air-foil plenum supply fans allows design flexibility for quieter applications and redundancy for applications where unit up time is critical.
• Up to 100% outside air to meet ventilation requirements.
• Electric, steam, hot water, indirect fired gas, and direct fired gas heating.
• Power exhaust and power return plenum fan 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 with optional drain pan for field installed components.

Construction

• Double wall rigid polyurethane foam insulated cabinet construction has a thermal resistance of R-13 and includes thermal breaks to reduce heat transfer through the cabinet. The two-inch double wall panel construction dampens radiated compressor and fan sound and inhibits microbial growth, supporting indoor air quality.
• Walk-in compressor and control service vestibule provides shelter for the maintenance and service personnel while startup and periodic maintenace is performed on the unit.
• 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 floor covering in appropriate equipment access areas for improved durability and safety.
• Corrosion resistant polyurethane paint exceeds a 2,500-hour salt spray test.
• Compressor isolation valves are standard for improved service efficiency.
• Refrigerant circuits are provided with removable core filter driers and isolation valves for ease of service; no need to cut the refrigerant line as is done with brazed in filter driers.
• Unit specific color-coded wiring diagrams are laminated and permanently affixed inside the control compartment for ease of service.
• Factory installed, sensible or enthalpy controlled, AMCA Certified Class 2 low leakage gear driven economizer dampers allow for free cooling.  

Fans and Blowers

• Supply fan array with up to 12 high efficiency direct drive welded air-foil plenum fans. Optional backdraft dampers are available.
• Optional hybrid permanent magnet motors incorporate a synchronous reluctance rotor with permanent magnets to achieve an International Efficiency rating above IE5, offering significant energy savings at full speed and reduced speeds.
• VFD controlled supply, exhaust, and return fans for precise airflow control, building pressure control, and reduced power consumption.
• Direct drive, backward curved plenum power exhaust and return fans are more energy efficient, quieter, and require less maintenance than belt driven fans.

Controls

• Labeled electrical components and color-coded wiring match the unit specific color-coded wiring diagram which is laminated and permanently affixed inside the control compartment.
• Unit controls are contained within a walk-in service compartment isolated from the air stream for ease of service and quiet operation. Service compartment can be independently heated.
• Run test report, color-coded wiring diagram, and Installation, Operation, and Maintenance manual with startup form are included in control access compartment of every unit.

• Multiple methods of humidity control including: High Capacity Cooling Coils, Return Air Bypass, and Modulating Hot Gas Reheat Humidity Control which provides precise dehumidification, even with low sensible heat loads, without the temperature swings common with on/off reheat systems.
• Multiple high efficiency filtration options, including pleated, cartridge, or bag type, with up to a MERV 14 efficiency rating. HEPA filters available for applications that require it.
• Final filters are available even with gas heat units.
• Factory installed total and sensible AAONAIRE energy recovery wheels save cooling and heating dollars.
• Return fans are available for high return static applications.
• LED marine service lights for quick and convenient maintenance.
• Double pane viewing windows can be installed in all doors where viewing of operating equipment or interior cabinet is needed.
• 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 field without the trouble of installation and service in a crowded cabinet.