Application
Model FSD-M231 is a combination fire smoke damper with 3V
style blades. The FSD-M231 has been qualified to 10.2 m/s
and 1 kPa for operation and dynamic closure in emergency fire
smoke situations. Model FSD-M231 may be installed vertically
(with blades running horizontal) or horizontally and is rated for
airflow and leakage in either direction.
Ratings
UL 555 Fire Resistance Rating
Fire Rating: 3 Hours
Dynamic Closure Rating: Actual ratings are size
dependant
Maximum Velocity: 10.2 m/s
Maximum Pressure: 1 kPa
UL 555S Leakage Rating
Leakage Class: I
Operational Rating: Actual ratings are actuator
dependant
Maximum Velocity: 10.2 m/s
Maximum Pressure: 1 kPa
Maximum Temperature: 177°C—Depending on actuator
Construction Standard Optional
Frame Material Galvanized steel -
Frame Material
Thickness
Frame Type 127mm x 25mm
Blade Material Galvanized steel -
Blade Material
Thickness
Blade Type 3V -
Linkage Plated steel out
Axle Bearings Bronze -
Axle Material Plated steel -
Blade Seals Silicone -
Jamb Seals 304SS -
Closure device RRL RRL/OCI, TOR,
Closure
Temperature
W x H
mm 203 x 152
inches 8 x 6
1.5mm
(16 ga.)
hat channel
1.5mm
(16 ga.)
of airstream,
concealed in jamb
74°C
(165°F)
Minimum
Size
Single Section Multi-Section
813 x 1219 or
Maximum Size
914 x 914
32 x 48 or
36 x 36
-
-
-
-
Fusible Link
100°C (212°F),
121°C (250°F),
177°C (350°F)
1829 x 1219
72 x 48
Features:
• Frames are constructed with reinforced corners. Low profile
head and sill are used on sizes less than 432mm (17 in.) high.
• Blades are reinforced with 3 longitudinal structurally
designed vee's.
Model FSD-M231
Combination FIRE SMOKE DAMPERS
Steel 3-V Blades
UL 555S Leakage Class I
UL555 3 Hour Fire Resistance Rating
Model FSD-M231 meets the requirements for fire
dampers, smoke dampers and combination fire smoke
dampers established by:
National Fire Protection Association
NFPA Standards 80, 90A, 92A, 92B, 101 & 105
IBC International Building Codes
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
Greenheck Kunshan Co. Ltd and Greenheck Fan
Corporation certifies that the model FSD-M231 shown
herein is licensed to bear the AMCA Seal. The ratings
shown are based on tests and procedures performed in
accordance with AMCA Publication 511 and comply with
R
H
LH
* W & H dimensions furnished approximately 6mm undersize. (Add sleeve
thickness for overall sleeved damper dimension). Right hand drive is shown.
Left hand drive is available upon request.
Options:
• RRL/OCI (Open Closed Indications switches)
• TOR (Temperature Limited Override)
• Actuators (24V, 230V)
• Flanges
• Momentary test switch
• POC retaining angles
• Transitions (R, C)
Installation instructions available at www.greenheck.com
the requirements of the AMCA Certified Ratings Programs.
The AMCA Certified Ratings Seal applies to air performance
ratings only.
W
RH
Pressure Drop Data FSD-M231
5D 6D
5D
D
4 (W) (H
)
3.14
This pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three configurations shown. All
data has been corrected to represent standard air at a density of 1.201 kg/m3.
Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an
analysis of other system influences should be used to estimate actual pressure losses for a damper installed in a given HVAC
system.
AMCA Test Figures
Figure 5.3 Illustrates a fully ducted damper. This configuration has the lowest pressure drop of the three test configurations
because entrance and exit losses are minimized by straight duct runs upstream and downstream of the damper.
Figure 5.2 Illustrates a ducted damper exhausting air into an open area. This configuration has a lower pressure drop than
Figure 5.5 because entrance losses are minimized by a straight duct run upstream of the damper.
Figure 5.5 Illustrates a plenum mounted damper. This configuration has the highest pressure drop because of extremely high
entrance and exit losses due to the sudden changes of area in the system.