Handbook of air conditioning and refrigeration / Shan K

REFERENCES
ENERGY MANAGEMENT AND CONTROL SYSTEMS 5.67
door dampers for ventilation can be automatically shut off during morning warm-up and cooldown,
or nighttime setback except when ventilation reduces energy costs, or ventilation must be
supplied. Both outdoor air or exhaust dampers shall have a maximum air leakage of 3 cfm/ft 2
(15 L/s�m 2 ) at a pressure difference of 1.0 in WC (250 Pa). As an exception, gravity dampers
(nonmotorized) are acceptable in buildings less than three stories in height or for buildings of any
height in climates with HDD65 less than 2700. Also excepted are systems with a design outside
air intake of 300 cfm (142 L/s) or less that are equipped with motor operated dampers.
● Zone isolation. HVAC systems serving zones that are intended to operate or be occupied nonsimultaneously
shall be divided into isolation areas. Each isolation area shall be no larger than
25,000 ft 2 (2320 m 2 ) of floor area nor include more than one floor. Each isolation area shall be
equipped wih isolation devices that can automatically shut off the supply of conditoned air, outside
air, and exhaust air from the area. Each isolation area can be controlled independently.
Alexander, J., Aldridge, R., and O’Sullivan, D., Wireless Zone Sensors, Heating/Piping/Air Conditioning,
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Alpers, R., and Zaragoza, J., Air Quality Sensors for Demand Controlled Ventilation, Heating/Piping/Air
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Control of Chemical Processes, Copenhagen, 1984.
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pp. 73–78.
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Part I, pp. 333–342.
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1989, pp. 60–67.
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in Prediction and Adaptive Control, ASHRAE Transactions, 1996, Part I, pp. 1141–1146.
Davison, F. G., Direct Digital Control Documentation Employing Graphical Programming, ASHRAE Journal,
no. 9, 1992, pp. 46–52.
Dexter, A. L., and Benouarets, M., A Generic Approach to Identifying Faults in HVAC Plants, ASHRAE Transactions,
1996, Part I, pp. 550–556.
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