Damper Maintenance
Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary, use mild detergents or solvents. If lubrication is desired for components such as axle bearings, jackshaft bearings and jamb seals, do not use
Dampers and their actuator(s) must be maintained, cycled, and tested a minimum in accordance with:
•The latest editions of NFPA 80, 90A, 92A, 92B, 101, 105, UL864, AMCA
•Actuator manufacturer recommendations.
Damper Troubleshooting
The following is a possible cause and correction list for common concerns with the dampers.
Symptom | Possible Cause | Corrective Action | |
| Frame is 'racked' causing blades | Adjust frame such that it is square and plumb | |
| to bind on jamb seals |
| |
|
|
| |
| Actuator linkage loose | Close damper, disconnect power, adjust and | |
Damper does not |
| tighten linkage | |
|
| ||
fully open and/or | Defective motor | Replace | |
close |
|
| |
Screws in damper linkage | Damper installed too far into wall. Move out | ||
| |||
|
| to line as designated on damper label | |
| Contaminants on damper | Clean with a | |
|
| Damper Maintenance) | |
RRL or TOR sensor | Heat | Push reset button located on backside of | |
tripped |
| RRL or TOR | |
|
|
| |
Damper does not | No power supplied to the actuator | Add power supply | |
operate |
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| |
|
|
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Copyright © 2008 Greenheck Fan Corporation
461337 OFSD ODFD Rev 9 January 2008
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