The AMCA laboratory has the capability to test fans, louvers, dampers, air curtains ANSI/AMCA D Laboratory Methods of Testing Dampers for Rating . Buy AMCA D: LABORATORY METHODS OF TESTING DAMPERS FOR RATING from SAI Global. ANSI/AMCA D Laboratory Methods of Testing Dampers for Rating The purpose of this standard is to establish uniform laboratory test methods for.
|Published (Last):||14 November 2015|
|PDF File Size:||1.98 Mb|
|ePub File Size:||19.91 Mb|
|Price:||Free* [*Free Regsitration Required]|
AMCA seeking volunteers to serve on AMCA 500-D Review Committee.
B Blank off exiting end of chamber location where tail end piece Figure 6. Section A-A shows 8 holes equally spaced and free from burrs. Purpose The purpose of this standard is to establish uniform laboratory test methods amcw dampers.
After closure the differential pressure after equilibrium is achieved shall be recorded.
A curve for each variable shall be obtained by drawing a continuous curve using the test points for reference. The correction shall be calculated from: Since the airflow and pressures through a damper in a typical system are never strictly steady, the pressure indicated on any instrument will fluctuate with time. The mass per unit volume of air.
Under conditions of the specified airflow, the damper shall completely open and latch automatically when a latch is provided without damage to the damper or its components. All pressure taps shall conform to the specification in Section 6.
Open a nozzle 8. The pressure differential is established when the damper is in the closed position. A straight line shall then be drawn through each set of data points. Pressure is force per unit area.
Dampers Archives – Modular Framing Systems
The installation types and the corresponding test damper setup figures are: The uncertainty of the airflow rate measurement can be reduced by changing to a smaller nozzle or combination of nozzles for low airflow rates.
The spacing of measurements shall be in accordance with Figure 3. SI units are based on the fundamental values of the International Bureau of Weights and Measures , 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 amcx the International Bureau.
Seating torque ammca the torque specified to properly seal the 50d damper. The three cycles at ambient are a preconditioning test prior to conduct of heated air closure test. Inlet chambers shall have a cross-sectional area at least three times the free area of the damper being tested.
Objective, Observations and Conduct of Test 8.
The total pressure or the static pressure at a point may be sensed with a Pitot-static tube of the proportions shown in Figure 2. Where amcs planes are located on both sides of the settling means within the chamber, the requirements for each side as outlined above shall be met.
The test sample must be at rated test temperature prior to reopening. It is expressed as the volumetric rate of air passing through the damper divided by the face area. The instruments and apparatus used in the test shall be listed. One reading per determination of chamber static pressure Ps7 shall be recorded.
It is the algebraic sum of the velocity pressure and the static pressure at a point. A stable pressure differential across the closed damper shall be established before commencement of the opening cycle.
AMCA International Disclaimer AMCA International uses its best efforts to produce standards for the benefit of the industry and the public in light of available information and accepted industry practices.
This procedure shall have been checked and documented no greater than 6 months before any AMCA certified Figure 5. This test shall be referred to as the damper and system test.
Within a few moments, and before the bubble solution can dry, the wetted areas shall be checked. The nozzle throat dimension D shall be measured to an accuracy of 0. The airflow generating equipment is to be capable of producing the prescribed airflow and pressure conditions without the use of pressure relief dampers.
ANSI/AMCA D – Laboratory Methods of Testing Dampers for Rating
If airflow across downstream tail end piece Figure 6. The cross-section of the elliptical portion is one quarter of an ellipse, having the large axis D and the small axis 0. Rectangular elbows shall be smooth radius constructed in accordance with Table Airflow rates may be measured directly using a calibrated airflow meter capable of measuring airflow in increments of 0. Straighteners are specified so that flow lines will be approximately parallel to the 500r axis. The diameter measurements shall be accurate to 0.
The Reynolds number Re based on nozzle exit diameter D6 shall be calculated from: Ps5 may not be amcx to calculate the damper pressure differential.
All airflow measurements and pressure differential measurements are established at ambient conditions and are corrected to standard air. Straighteners or star straighteners shall be used in ducts which provide measuring planes for airflow measurement. Multiple nozzles shall be located as symmetrically as possible. The volume flow rate Q5 at the entrance to a nozzle or multiple nozzles with chamber approach shall be calculated from: If desired, the blade angle may be measured degrees from closed at each test point.