Greenheck FD Installation, Operation And Maintenance Instructions page 8

24 in. o.c.
Maximum
(metal studs)
12 in.
24 in. o.c.
Maximum
16 in. o.c.
Maximum
(wood studs)
Floor Runner
Figure 8: Preparation detail for opening in stud wall.
Damper Maintenance
Dampers shall be maintained, cycled, and tested in intervals as stated in the latest editions of NFPA 90A, 92A, and UL
864 unless local codes require more frequent inspections.
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, do not use oil-based lubricants or any other lubricants that attract con-
taminant's such as dust.
Damper Trouble Shooting
The following is a cause and correction list for common concerns with the dampers.
Symptom
Damper does not fully open and/or
fully close
Link separated
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifica-
tions 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
452763• DFD, FD, SSDFD Series Rev. 21, June 2015
8
24 in. o.c.
Ceiling Runner
Maximum
(metal studs)
2 in. (51mm)
2 Panhead
Screws
2 in. (51mm)
16 in. o.c.
Maximum
(wood studs)
Possible Cause
Frame is 'racked' causing blades to
bind on jamb
Screws in damper linkage
Contaminant's on damper
Heat
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Metal stud only
Figure 8A
Adjust frame such that it is square
and plumb
Locate screws and remove
Clean with a non-oil based solvent
(see Damper Maintenance)
Replace link
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Corrective Action