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 oil-based lubricants or any other lubricants that attract contaminants such as dust.
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 503-03 and local codes.
• 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
Damper does not fully
open and/or close
Frame is 'racked' causing blades to bind on
jamb seals
Adjust frame such that it is square and plumb
Actuator linkage loose Close damper, disconnect power, adjust and tighten link-
age
Defective motor Replace
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 non-oil based solvent (see Damper Mainte-
nance)
RRL or TOR sensor tripped Heat Push reset button located on backside of RRL or TOR
Damper does not operate No power supplied to the actuator Add power supply
461868• FSDR DFDR Series Rev. 14, August 2013 Copyright 2013 © Greenheck Fan Corporation
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 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
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