ANSI AMCA 240:2015 pdf download.Laboratory Methods of Testing Positive Pressure Ventilators for Aerodynamic Performance Rating.
ANSI AMCA 240 may be used as the basis for the test of a PPV when air is used as the test gas. Each test shall be limited to one PPV per test. A PPV tested in accordance with this standard shall be freestanding and without a ductwork connection to the test chamber, thereby allowing for the measurement of entrained airflow.
Any item of equipment designed or intended for applications other than positive pressure ventilation is not within the scope of this standard.
The parties to a test for guarantee purposes may agree in writing on exceptions to this standard prior to the test. However, only a test that does not violate the mandatory requirements of this standard shall be designated as a test conducted in accordance with this standard.
3. DefinitionslUnits of Measure/Symbols
3.1 Definitions
For the purposes of this standard, the definitions in Section
3.1 apply. All other definitions shall conform to ANSI/AMCA
Standard 210, Section 3.
3.1.1 Positive pressure ventilator (PPV)
A portable fan that can be positioned relative to an opening of an enclosure and cause it to be positively pressurized by discharge air velocity. It is principally used by firefighters to mitigate the effect of smoke and is also used to assist in inflating hot air balloons [2].
3.1.2 Motor
A drive device other than an internal combustion engine, such as an electric motor, water turbine, hydraulic motor, air motor and similar devices
3.1.3 Engine
A drive device that produces power through internal combustion and that uses a fuel such as gasoline.
3.1.4 PPV position
The point representing a PPV position in three-dimensional space is taken as the intersection between the PPV axial centerline and the plane perpendicular to the centerline that contains the PPV center of the PPV impeller hub. All measurements pertaining to the PPV must be referenced to this point.
3.1.5 Setback
The horizontal distance between the PPV position and the opening to the test chamber, within a vertical plane perpendicular to the plane defined by the chamber opening.
3.1.6 Height
The vertical distance between the PPV position and the flat, horizontal surface on which the PPV is situated.
3.1.7 Tilt
The angle between the PPV axial centerline and the horizontal plane.
3.1.8 PPV speed
The rotational speed of the PPV impeller.
3.1.9 Test
A series of determinations for various points of operation of
a PPV.
3.1.10 Shall and should
The word “shall” is understood as mandatory and the word “should” as advisory.
3.2 Units of measure
The units of measure used in this standard shall conform to
ANSI/AMCA Standard 210, Annex A.
3.3 Symbols
The symbols listed in Table I apply for the purposes of this standard. All others shall conform to ANSI/AMCA Standard 210, Section 4.
4. Instruments and Methods of Measurement
In addition to the following, the manufacturer shall adhere to the requirements of ANSI/AMCA Standard 210, Section 5, as applicable.
4.1 Manometers and other pressure indicating instruments
Pressure (except PPV static pressure) shall be measured on a manometer of the liquid column type using inclined legs, vertical legs or any other instrument having a maximum uncertainty of 1% over the maximum observed reading or I Pa (0.005 in. wg), whichever is larger.ANSI AMCA 240 pdf download.