Advertisement
Maintenance
Greenheck's dampers are designed to be trouble free and hassle free under normal 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.
Bearings. Ball bearings with grease fittings should be lubricated as follows:
Closure
Remove foreign materials that may be interfering with blade closure or effective sealing of the blades with each other
or with the frame.
Blade Seals. Inspect annually. Replacement is recommended after 8 years to reduce the potential of leakage.
Damper serial number required when ordering replacement seal.
Axle seals. Inspect and adjust as necessary.
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.
Actuator
Cycle test actuator per manufacturer's recommendations.
Maximum Duct
Lubricant
Temperature °F (°C)
NLG1 Grade 2 lithium
250° (121°)
12-hydrostearate grease
Minimum
Frequency
twice a year
HBT Series
3
Advertisement
