• Pressure Differential • Thermal Dispersion

Airow Measuring Technologies Greenheck airow measuring products are available with either differential pressure based technology or thermal dispersion technology. How do differential pressure based airow measuring products work? Differential pressure based airow measuring products use an array of air pressure pick-ups to compare the total pressure going through the airow station with the static pressure in the station. The design of the pressure pick-up assembly amplies the difference between these two pressures. The resulting differential pressure is an amplied “velocity pressure”, which is...

AMS & AMD Series AMS Series The AMS is an accurate airow measuring station furnished with a properly sized pressure transducer that outputs a 0-10 VDC signal proportional to airow. A eld-supplied controller can use the transducer’s voltage signal along with the ow formula (provided) to control a modulating actuator to a target set point. The AMS is available with a factory-supplied controller that accepts a target ow set point (either analog or digital). 0-10 VDC outputs are available for actual airow reading and modulation of an external airow control device (such as a damper or VFD). AMD Series...

Features Blade Styles 3V blades are fabricated from a single thickness of galvanized steel incorporating three longitudinal V-type grooves running the full length of the blade to increase strength. Airfoil blades are constructed of double-skin galvanized steel or extruded aluminum. This blade design results in lower resistance to airow and increased strength for use in pressure systems. Blade Operation Damper blades operate parallel to one another for precise airow volume control. No Field Calibration Greenheck’s AMD and AMD-TD series do not require eld calibration. A label is provided on the...

Damper Performance Testing Criteria Pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three congurations shown. All data has been corrected to represent standard air at a density of 3 .075 lb/ft (1.201 kg/m3). Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an analysis of other system inuences should be used to estimate actual pressure losses for a damper installed in a given HVAC system. 5D Figure 5.3 Illustrates a fully ducted damper. This conguration has the lowest pressure drop of...

Damper Performance AMD-33 and AMD-33-TD Dimension inches AMCA gure Velocity (ft/min) AMD-42 and AMD-42-TD Dimension inches AMCA gure Velocity (ft/min) AMD-42V and AMD-42V-TD Dimension inches AMCA gure Velocity (ft/min)

Damper Leakage Leakage Damper leakage (with blades fully closed) meet Class 1A and Class 1 requirements at appropriate pressures. Test Information Air leakage is based on operation between 32°F and 120°F (0° to 49°C). Tested for leakage in accordance with ANSI/AMCA Standard 500-D, Figure 5.5. Tested for air performance in accordance with ANSI/AMCA Standard 500-D, Figures 5.2, 5.3 and 5.5. Torque Data is based on a torque of 5.0 in-lb/ft2 (0.56 N·m) applied to close and seat the damper during the test. AMD-23 Leakage Class* Maximum Damper Width Torque Data is based on a torque of 7.0 in-lb/ft²...

Features/Options QR Codes QR (Quick Response) codes have been added to the labels on commercial control and air measuring dampers. When you scan the QR code with your smartphone, it will link to www.greenheck.com based on the model. Clean Wrap In the Indoor Air Quality section of the Green Building and LEED Core Concepts Guide 2009, you need to protect air quality during construction and prevent dust and particulate buildup. Greenheck offers Clean Wrap to help meet this requirement. Clean Wrap is a thin lm that adheres to the ends of the damper sleeve to prevent dust, dirt and debris from entering...