Copyright © 2008 Greenheck Fan Corporation
SEFSDR-511 Rev. 7 June 2008
3.375 IN.
FUSIBLE LINK
(standard)
LOCATION
CLEARANCE FOR
EXPANSION
TOP VIEW OF DAMPER
6 IN. MAX
SLEEVE LENGTH
Wall
DUCT
CONNECTION
AREA
AIRFLOW
1.5 IN.
ACTUATOR
16.00 IN MAX
OPTIONAL BLADE POSITION
INDICATOR AND/OR ELECTRIC
LINK.
DUCT
CONNECTION
AREA
1.5 IN.
1.50 IN.
Optional
Second
Retaining
Plate
Do not place retainer
plate in this groove
5.375 in.
3.06 in. or 7.43 in.*
* 7.43 in. when OCI, RRL, RRL/OCI,
TOR, or PRV is selected
Retaining plate
Specifications
True round combination fire smoke dampers meeting the
following specifications shall be furnished and installed
where shown on plans and/or as described in schedules.
Dampers shall meet the requirements of the latest edition of
NFPA 80, 90A, 92, 92A, 101 & 105.
Damper shall be constructed of 20 ga. (1mm) 316 stainless
steel frame; blades constructed of double skin 316 stainless
steel round style blades; silicone rubber blade seals; ½
in. 316 stainless steel axles; 316 stainless steel bearings.
Damper is provided with one retainer plate.
Dampers shall be tested, rated and labeled in accordance
with the latest edition of UL standards 555 and 555S.
Dampers shall have a UL 555 fire damper of 1 1/2 hours.
Each damper shall be equipped with a heat responsive
device which has been tested and approved for use with
the damper assembly in accordance with UL555. The
heat responsive device shall have a temperature rating of
(specifier select one of the following) 165º F (74ºC), 212º F
(100ºC), 286º F (141ºC) , or 350º F (177ºC).
Damper actuators shall be factory mounted and qualified for
use with the damper in accordance with UL555S. Damper
actuators shall be (specifier select one of the following)
electric type for 120 (or 24) volt operation or pneumatic
type for 25 psi minimum (30 psi maximum) operation.
Manufacturer’s submittal data shall indicate actuator space
requirements around the damper.
Dampers shall have a UL555S leakage rating of Class I and a
temperature rating of 250ºF (121°C) minimum. Dampers shall
have a UL555S operational airflow equal to or greater than the
airflow at its installed location and an operational pressure
rating of 4 in. wg (1 kPa).
All UL555 and UL555S dynamic closure ratings and leakage
ratings shall be qualified for airflow and pressure in either
direction through the damper. UL ratings shall allow for
mounting damper vertically or horizontally.
The Damper manufacturer’s submittal data shall certify all
air performance pressure drop data is tested in accordance
with the AMCA certified ratings program for test figures 5.2,
5.3, and 5.5. Damper air performance shall be developed in
accordance with the latest edition of AMCA standard 500-D.
Basis of design is Greenheck’s model SEFSDR-511.
