Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Reexamination Certificate
2011-04-05
2011-04-05
Norman, Marc E (Department: 3744)
Automatic temperature and humidity regulation
Ventilator type
Electrically actuated
C062S178000, C062S186000
Reexamination Certificate
active
07918407
ABSTRACT:
An energy saving air quality control system modulates supply fan speed by use of controlled, variable-frequency drive controls for automatic dampers or suction pressure to maintain adequate air flow across the evaporator coil at partial cooling loads. Demand ventilation in the system balances air quality and energy consumption by controlling the outdoor air damper in response to indoor CO2levels. The control system variously either (1) produces a variable 0-10 VDC output signal to modulate the outside ventilation air damper as required to keep the CO2concentration below a set point; (2) produces a 0 or 24 VAC signal to either open or close a two-position outside air damper for as long a time period as is required in order to keep the CO2concentration below a set point; or (3) allows manually setting the outside air damper to provide proper ventilation air at maximum occupancy and maximum air flow and modulates the supply fan speed as required to keep the CO2 concentration as measured by a CO2 monitor below set point.
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Title of Item: The Application of Electronic Variable Speed Drives To Small Packaged Rooftop HVAC Units; date Jan. 10, 2005; pp. 1-5.
AAON Title: Single Zone VAV Discover how to save money, reduce energy consumption and lower sound levels. Brochure published on AAON webpage in 2010.
Baker Donelson Bearman Caldwell & Berkowitz PC
Johnson Micheline Kelly
Norman Marc E
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