Greenheck Fan SMD-301V User Manual
Model SMD-301V
Smoke Dampers
Steel Airfoil Blades
UL 555S Leakage Class I
Application
Model SMD-301V is a vertical blade low leakage rated smoke
damper. High strength airfoil blades insure lowest resistance to
airflow in HVAC systems with velocities to 4000 fpm (20.3m/s) and
4 in. wg (1.0 kPa).
UL555S Leakage Rating
Leakage Class: I
Operational Rating
Maximum Velocity: 2000 fpm (20.3 m/s) up to
100 in. x 32 in. H
(2540mm x 813mm) or
4000 fpm (20.3 m/s) up to
50 in. x 32 in. (1270mm x 813mm)
Maximum Pressure: 4 in. wg (1 kPa)
Maximum Temperature: 350ºF (177ºC)
Standard Construction
Frame: 5 in. x 1 in. (127mm x 25mm)
galvanized steel hat channel with
reinforced corners. A low profile
head and sill are used on sizes
less than 17 in. (432mm) high to
maximize free area and
performance.
Blades: Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2 mm) equivalent thickness.
Seals: Extruded silicone rubber blade
seals. Flexible stainless steel
jamb seals.
Linkage: Concealed in jamb.
Axles:
Bearings: 304 stainless steel
1
/2 in. (13mm) dia. plated steel.
Size Limitations:
Minimum Size:
(152mm W x 203mm H)
Maximum Size:
Single Section: 50 in. W x 32 in. H
(1270mm W x 813mm H)
Multiple Section: 100 in. W x 32 in. H
(2540mm W x 813mm H)
6 in. W x 8 in. H
Model SMD-301V 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)
CSFM California State Fire Marshal
Leakage (Smoke) Damper Listing (#3230-0981:104)
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555S (Listing #R13317)
W*
H*
Optional Features:
• OCI (Open closed indication switches)
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Transitions (R, C, O)
• POC retaining angles
• Momentary Switch
• Sealed transitions and sleeves
*W&H dimensions furnished approximately 1/4 in. (6mm) undersize.
Installation instructions available at www.greenheck.com
Pressure Drop Data SMD-301V
5D 6D
5D 6D
5D
D
4 (W) (H)
3.14
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 .075 lb/ft
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 conguration 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.
3
(1.2 kg/m
3
).
Figure 5.3
Figure 5.2
Figure 5.5
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