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These instructions describe the installation of a
CRD designs: L528, L546, L558, L562, L574, L576,
L581, L583, L585, L592, M501, M503, M508, P533,
P538, P545, P547, P548, P554, and P580 as detailed in
the UL Fire Resistance Directory.
GA File No.
FC 5012
FC 5078
FC 5101
FC 5119
FC 5121
FC 5514.4
FC 5515
FC 5515.3
FC 5516
FC 5519
FC 5521
FC 5528
RC 2603
RC 2604
RC 2606
RC 2609
RC 2612
GA = Gypsum Association Fire Resistance
Manual 22 nd Edition
Damper Troubleshooting
The following is a possible cause and correction list for common concerns with the dampers.
Symptom
Frame is 'racked' causing blades to bind on jamb seals Adjust frame such that it is square and plumb
Damper does
Screws in damper linkage
not fully open
and/or close
Contaminants on damper
Link separated
Heat
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the literature
section of the website at Greenheck.com/Resources/Library/Literature.
®
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts : 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
4
485180 • SP-AP0511W/L & CRD Installation, Rev. 1, December 2021
UL Design No.
M508
L558
L574, M508
L592
L528, L546, L574, M508
L585
L528
M503
L528
L574
L562
L528
P533
P554
P545
P538
P545, P554
Possible Cause
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.
Corrective Action
Damper installed too far into wall. Move out
to line as designated on damper label
Clean with a non-oil based solvent (see
Damper Maintenance)
Replace link
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