Model SSSMDR-501 meets the requirements for
smoke dampers established by:
National Fire Protection Association
NFPA Standards 92A, 92B, 101 & 105
IBC International Building Codes
New York City
(MEA listing #260-91-M)
California State Fire Marshall
Listing #: 2330-0981:104
Application
Model SSSMDR-501 is a 304 stainless steel round smoke damper
with extremely low leakage. The SSSMDR-501 has been qualified
to 3,000 fpm (15.2m/s) and 4 in. wg (1.0 kPa) for operational closure
in emergency smoke control situations, for use in HVAC system
applications.
Ratings
Leakage:
Class I
Pressure:
4 in. wg (1 kPa) - differential pressure
Maximum
Velocity:
3000 fpm (15.2 m/s)
Temperature:
350°F (177ºC) depending on the actuator.
Standard Construction
Frame/Sleeve:
20 ga. (1mm) stainless steel integral sleeve
Blades:
Double skin stainless steel (14 ga. [2mm]
equivalent) round style blades
Seals:
Silicone rubber.
Axles:
1
⁄
2
in. (13mm) dia. stainless steel.
Bearings:
Oil impregnated stainless steel
Size Limitations:
Minimum Size:
6 in. diameter (152mm)
Maximum Size:
24 in. diameter (610mm)
Optional Features:
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Open/Close Indicator (OCI) for remote indication of blade
position
• 14 ga. (2mm) or 16 ga. (1.5mm) frame/sleeve
SSSMDR-501
Smoke Dampers
UL 555S Leakage Class I
* D dimension furnished approximately
1
⁄
8
in. (3mm) undersize.
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555S (Listing #R13317)
Specifications
True Round 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 92A, 92B, 101 & 105.
Dampers shall be tested, rated and labeled in accordance with the
latest edition of UL Standards 555S. Dampers shall be UL labeled for
use in dynamic systems. The damper shall have a dynamic closure
airflow rating equal to or greater than the airflow at the damper’s
installed location and a dynamic closure pressure rating of 4 in. wg
(1 kPa).
Dampers shall have a UL 555S leakage rating of Class I and a
temperature rating of 250º F (121ºC) minimum. Dampers shall have a
UL555S operational airflow rating equal to or greater than the airflow
at its installed location and an operational pressure rating of 4 in. wg
(1 kPa). Damper actuators shall be factory mounted and qualified for
use with the damper in accordance with UL555S.
Damper actuators shall be (specified 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.
All UL555S operational 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 licensed in accordance with the
AMCA certified ratings program for test figures 5.2, 5.3, and 5.5.
Damper air performance data shall be developed in accordance
with the latest edition of AMCA Standard 500-D.
Basis of design is Greenheck’s model SSSMDR-501.
Copyright © 2008 Greenheck Fan Corporation
SSSMDR-501 Rev. 7 June 2008
D*
Installation instructions available at www.greenheck.com.
