ANSI AMCA 230-2015 pdf free download.Laboratory Methods of Testing Air Circulating Fans for Rating and Certification
1. Purpose
The purpose of this standard is to establish uniform meth- ods for laboratory testing of air circulating fans to determine performance (forward or reverse fow) in terms of airfow rate for rating, certifcation or guarantee purposes.
2. Scope
This standard shall be used as the basis for testing air circulating fan heads, ceiling fans, box fans, table fans, portable personnel coolers or other air circulating devices when air is used as the test gas. The diameter of the fan being tested shall be limited by the minimum dimensions as shown in the applicable test fgures. Blowers, exhausters, compressors, positive displacement machines and positive pressure ventilators are not within the scope of this standard. The parties to a test for guarantee purposes shall agree on exceptions to this standard in writing prior to the test. However, only tests which do not violate any mandatory requirements of this standard shall be designated as tests conducted in accordance with this standard.
3. Units of Measurement
3.1 System of units
SI units (The International System of Units, Le Systéme International d’Unités) [1] are the primary units employed in this standard, with I-P units (inch-pound) given as the secondary reference. SI units are based on the funda- mental values of the International Bureau of Weights and Measures [1], and I-P values are based on the values of the National Institute of Standards and Technology, which are in turn based on the values of the International Bureau.
3.2 Basic units
The SI unit of length is the meter (m) or the millimeter (mm); the I-P unit of length is the foot (ft) or the inch (in.). The SI unit of mass is the kilogram (kg); the I-P unit of mass is the pound mass (lbm). The unit of time is either the minute (min) or the second (s). The SI unit of temperature is either the Kelvin (K) or the degree Celsius (°C); the I-P unit of temperature is either the degree Fahrenheit (°F) or the degree Rankine (°R). The SI unit of force is the newton (N); the I-P unit of force is the pound force (lbf).
3.3 Velocity
The SI unit of velocity is the meter per second (m/s); the I-P unit of velocity is the foot per minute (fpm).
3.4 Thrust
The SI unit of thrust is the newton (N); the I-P unit is the pound force (lbf).
3.5 Pressure
The SI unit of pressure is the pascal (Pa). The I-P unit of pressure is either the inch water gauge (in. wg) or the inch mercury (in. Hg). Values in mm Hg or in in. Hg shall be used only for barometric pressure measurements. The in. wg shall be based on a one-inch column of distilled water at 68 °F under standard gravity and a gas column balancing effect based on standard air. The in. Hg shall be based on a one-inch column of mercury at 32 °F under standard gravity in a vacuum. The mm Hg shall be based on a one-millimeter column of mercury at 0 °C under stan- dard gravity in a vacuum.
3.6 Power
The unit of input power is the watt (W).
3.7 Speed
The unit of rotational speed is the revolution per minute (rpm).
3.8 Gas properties
The SI unit of density is the kilogram per cubic meter (kg/ m 3 ); the I-P unit of density is the pound mass per cubic foot (lbm/ft 3 ). The SI unit of viscosity is the pascal-second, (Pa-s); the I-P unit of viscosity is the pound mass per foot- second (lbm/ft-s). The SI unit of gas constant is the joule per kilogram-kelvin (J/kg-K); the I-P unit of gas constant is the foot-pound force per pound-mass-degree Rankine (ft-lb/(lbm•°R)).
