M2 Series

Applications

• Air handling unit with chilled water or direct expansion coils from 1,000 - 21,600 cfm.
• Heating from hot water, steam, indirect fired gas, and electric elements.
• Split system heat pump with air-source, water-source, or geothermal configurations.
• Make up air capability, up to 100% outside air, to meet ventilation requirements.

Construction

• The M2 Series modular design provides easy installation at the job site. Unit modules may be factory assembled to prevent unnecessary lifting at the job site or shipped separately for job site maneuverability.
• Double wall cabinets utilize thermal breaks and closed-cell polyurethane foam to increase thermal resistance, improve air seals, inhibit microbial growth, reinforce structural integrity, and attenuate radiated sound.
• Access into fan, filter, and coil sections is quick and easy through double wall rigid polyurethane foam panels. The panels have chrome plated steel hinges and quarter turn, zinc cast, lockable handles for effortless entry and removable hinge pins for access in compact spaces.
• Selectable base rail height allows for condensate trapping and eliminates the need for a costly housekeeping pad.
• Sloped stainless steel drain pans eliminate standing water which can support microbial growth and stainless steel construction resists corrosion that could lead to water leaks and contaminants in the air stream.

Fans and Blowers

• Fans and blowers are individually selected to match external static, sound, efficiency, and space design criteria as specified. Blowers are backward curved centrifugal plenum style. Blowers with backward curved blades are generally quieter and more efficient than forward curved blowers.
• Premium efficiency motors, direct drive systems, and variable speed fan control provide the highest available efficiencies and operating cost savings.
• Electronically commutated backward curved plenum motorized impellers are available to provide precise airflow control and reduced power consumption.
• Supply fans, exhaust fans, and return fans are incorporated into fan arrays for redundancy, low turndown, and low noise capabilities.

Controls

• Unit wiring is completely factory provided with color-coded wires. Units are provided with unit specific, color-coded wiring diagrams. Diagrams are laminated and permanently affixed inside control compartment access door.
• Factory provided or customer provided controller can be selected to meet existing or new building control architecture.
• Factory run test and inspection reports are included in the documentation compartment affixed to the interior of the control compartment access door.

• AAONAIRE energy recovery is factory installed to reduce the operating expenses associated with supplying outside air to buildings. By reclaiming up to 80% of the exhaust air energy, AAONAIRE energy recovery units maintain comfortable temperatures and humidity during both cooling and heating conditions. AAONAIRE energy recovery wheels are rated to AHRI Standard 1060 and bear the AHRI Certification symbol.
• Pleated and/or cartridge filters are available with or without monitoring devices to meet the building’s required indoor air quality.
• UV-C lighting is available inside the cabinet to meet even the most stringent indoor air quality requirements while increasing system performance and longevity by eliminating mold growth on coils.
• Coils are available with polymer e-coatings, copper fins, and stainless steel casings to minimize corrosion and improve air quality.
• Modulating hot gas reheat, reclaim coils, and return air bypass can provide the precise humidity control necessary to maintain occupant comfort.
• Cabinets can have custom interior and exterior paint to enhance aesthetics while improving corrosion resistance and indoor air quality.
• Electric and hot water preheat systems can be provided to prevent hydronic coil freezing.