455308 • SWB /B / SFD, Rev. 6, April 2011
Copyright 2011 © Greenheck Fan Corporation
Damper Maintenance
Greenheck's dampers are designed to be trouble free and hassle free under normal operation . Dampers are to be
installed square and straight so as to prevent binding during operation . The following annual damper maintenance
suggestions will help to insure proper damper operation and increase the life expectancy of the damper .
Foreign Matter
Over the course of time, dirt and grime may collect on damper surfaces . The
damper surfaces should be cleaned to prevent hindrance to airflow .
Moving
Parts
Make sure that parts such as linkage, bearings, blades, etc . that are intended to
move freely, can do so . Lubricating these components can prevent possible rusting
and unnecessary friction increase . Use only a moli-spray oil or similar graphite
based oil as regular lubricating oil will attract dirt .
Bearings:
Synthetic, oil impregnated, and ball bearings (without grease fittings) do not require
lubrication . Ball bearings with grease fittings require only minimal grease .
Closure
Remove foreign materials that may be interfering with blade closure or effective
sealing of the blades with each other or with the frame .
Operation
While operating the damper through its full cycle, check to see that the blades open
and close properly . If there is a problem, check for loose linkage, especially at the
actuator . Tighten the linkage where required .
Minimum Installation Requirements
When installing the AMD-xx-TD, the installation should match as closely as possible to one othe examples shown on
pages 10 and 11 . Failure to match the installation examples may negatively affect the performance and accuracy of
the AMD-xx-TD .
Avoid locating the AMD-xx-TD where they will be exposed to condensing moisture, such as downstream of a coil or
humidifier .
Design requirements for installing the AMD-xx-TD:
• Turbulent Airflow: The engineered design of the AMD-XX-TD sensor aperture will permit accurate airflow
measurement in the presence of moderate air turbulence as long as the AMD-XX-TD is installed the required
distance as shown above in the examples on pages 10 and 11 .
• Stratified Airflow: The AMD-XX-TD should be mounted so that the probes cross any stratified airflow - not
parallel to flow .
• Airborne Contaminants: The levels of air filtration and cleanliness associated with commercial HVAC systems
are satisfactory for the AMD-XX-TD . Applications containing contaminants or condensing moisture may
impair airflow measurement accuracy and functionality .
478799 • AMD-TD Series, Rev. 4, September 2017
Copyright 2017 © Greenheck Fan Corporation
12
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the
Library under Warranties.
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com
Our Commitment
®
