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.
|Genre:||Health and Food|
|Published (Last):||26 January 2006|
|PDF File Size:||5.98 Mb|
|ePub File Size:||9.37 Mb|
|Price:||Free* [*Free Regsitration Required]|
The description of the test damper, including the model, the damper type, i. The mass per unit volume of air.
The area is determined by the installation method as shown in the sketches below. Scope This standard may be used as a basis for testing dampers when air is used as the test gas. A determination is a complete set of measurements for a particular point of operation of the test damper.
Airflow shall then be shut off and the damper reset to its open position. Such devices shall be located on the end of the duct or chamber and shall be symmetrical about the duct or chamber axis. Multi-point or continuous record averaging can be accomplished with instruments and analyzers designed for this purpose.
A performance curve shall be drawn with airflow rate as an abscissa.
Each damper shall be tested a minimum of three times in both airflow directions at each selected combination of airflow rates through the open damper and amda differential across the closed damper. B Blank off exiting end of chamber location where tail end piece Figure 6. The arithmetic mean of the individual velocity measurements made at these points will be the mean velocity through the measuring section for the subject velocity profiles .
The damper leakage for these two tests is amcz by Equations 9.
AMCA seeking volunteers to serve on AMCA 500-D Review Committee.
The damper leakage through the nozzle plate shall be calculated in accordance with Section 9. The three cycles at ambient are a preconditioning test prior to conduct of heated air closure test.
The macro-pattern of the surface shall not exceed 0. A test is a complete set of measurements or determinationsone set for each one setting of airflow leakage rate and pressure drop.
One reading per determination of chamber static pressure Ps7 shall be recorded. Each pressure indicating instrument shall be calibrated at both ends of the scale and at least nine equally spaced intermediate points in accordance with the following: The acma nozzle is considered a primary instrument and need not be calibrated if maintained in the specified condition. Single or multi-blade dampers of less than 30 percent duct area blockage may be tested with 4D minimum upstream of Plane 9 and 6D minimum downstream of Plane 2 provided there is 15 percent maximum anca at any wall.
Alternatively, nozzles with throat taps may be used in which case the throat taps located as shown in Figure 7 shall be used in place of the downstream pressure taps shown in the figure for the setup and the piezometer 5000d each nozzle shall be connected to its own indicator. Table 7 displays allowable combinations of airflow rate measurement and test damper setups.
A bubble solution commercial test solution or a solution consisting of equal parts liquid detergent, glycerin and water shall be applied to the damper seal areas. Reproduction or translation of any part of this work beyond that permitted by Smca and amcq the United States Copyright Act without the permission of the copyright owner is unlawful.
The approximate temperature td1 when the heat responsive damper releases shall be estimated 050d recorded. One reading of chamber static pressure Ps7 shall be recorded.
Wet-bulb temperature is the temperature measured by a temperature sensor covered by a water-moistened wick and exposed to air in motion.
For each determination the damper leakage shall be the leakage with the damper in place damper and system minus the system leakage at the identical pressure. In addition, a statement 500x the measured airflow leakage rate per face area of damper corrected to standard air conditions shall be reported.
Airflow measurements using this damper shall be limited to a maximum of 4.
AMCA seeking volunteers to serve on AMCA D Review Committee.
Names, model numbers serial numbers, scale ranges and calibration information shall be recorded. All pressure taps shall conform to the specification in Section 6.
This test shall be referred to as the damper 5500d system test. A statement of the measured airflow leakage rate per face area of damper at the test temperature and test pressure shall be reported.
The minimum distance between centers of any two nozzles in simultaneous use shall be three times the throat diameter of the larger smca. Under conditions of the specified airflow and heat, the damper shall completely close and latch automatically when a latch is provided without damage to the damper or its components. Nozzles with integral throat taps shall be used for ducted nozzle setups.