SMD-401M
APPLICATION
Model SMD-401M is a class I leakage rated modulating smoke
damper. The model SMD-401M serves the function of
both a control damper and smoke damper. High strength airfoil
blades ensure the lowest resistance to airflow in HVAC systems
with velocities to 2000 fpm (10.2 m/s ) and 4 wg (1 kPa). Model
SMD-401M may be installed vertically (with blades running
horizontal) or horizontally and is rated for airflow and leakage in
either direction.
RATINGS
Leakage Class: I
Operational Rating: Actual ratings are size dependent.
Max. Velocity: up to 2000 fpm (10.2 m/s)
Max. Pressure: 4 in. wg (1 kPa)
Temperature: 250°F (121ºC) with all actuators.
Construction Standard Optional
Frame Material Galvanized steel -
Frame Material
Thickness
Frame Type
Blade Material Aluminum -
Blade Material
Thickness
Blade Type Airfoil -
Linkage
Axle Bearings Bronze 304SS
Axle Material Plated steel 304SS
Blade Seals Silicone -
Jamb Seals 304SS -
16 ga. (1.5mm) -
5 in. x 1in.
(127mm x 25mm)
hat channel
Heavy gauge
aluminum
Plated steel out of
airstream, concealed
in jamb
Double Flange
-
304SS
Size Limitations
Smoke Dampers
Extruded Airfoil Blades
UL 555S Leakage Class I
Model SMD-401M 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)
LH
H*
RH
W*
W x H
Inches 8 x 8 36 x 36 144 x 36
mm 203 x 203 914 x 914 3658 x 914
Minimum
Size
Maximum Size
Single
Section
Multiple Section
OPTIONS:
• Factory mounted accessories
- Retaining angles
- Quick connect breakaway connections
- S & drive connections
- Access doors
• Greenheck test switches (GTS-3 & GTS-4)
• Momentary test switch
• POC retaining angles
• OCI (Open closed indication switches)
• Sealed transitions and sleeves
• Security bars
• Smoke detectors
• Transitions: R, C, O
*W&H dimensions furnished approximately 1/4 in. (6mm) undersize.
(Add sleeve thickness for overall sleeved damper dimension)
Right hand drive is shown. Left hand drive is available upon request.
Features:
• Frames are constructed with reinforced corners. Low
profile head and sill are used on sizes less than 17 in.
high (432mm).
• Blades are extruded aluminum airfoil, symmetrically
shaped.
• Actuators: 24V
Installation instructions available at www.greenheck.com
SMD-401M Pressure Drop Data
Pressure Loss (in. wg)
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.
3
(1.201 kg/m3 ).
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.
Damper Size
12 in. x 12 in.
(305mm x 305mm)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
5.5
5.2
5.3
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
Figure 5.3
Figure 5.2
Figure 5.5
Damper Size
24 in. x 24 in.
(610mm x 610mm)
5D 6D
5D
Damper Size
36 in. x 36 in.
(914mm x 914mm)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
5.5
3.0
2.0
4 (W) (H
D
)
3.14
5.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Pressure Loss (in. wg)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
4 5 6 7 8 9 10
x 100
2 3 4 5 6 7 8 9 10
Velocity (fpm)
x 1000
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
4 5 6 7 8 9 10
x 100
2 3 4 5 6 7 8 9 10
Velocity (fpm)
5.2
5.3
x 1000
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Pressure Loss (in. wg)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
4 5 6 7 8 9 10
x 100
5.2
5.3
2 3 4 5 6 7 8 9 10
Velocity (fpm)
x 1000
Application Data
53/8"
5"
Right hand drive is shown
Left hand drive available upon request
A
Sleeve Length
Varies
6"
33/4"
11/2" max.
B*
S
T*
53/8 in.
5 in.A
Sleeve Length
Varies
33/4 in.
1
1
/2 in. max.
53/8"
5"
A
Sleeve Length
33/4"
11/2" max.
Damper Sideplate and Sleeve Dimensional Data
The drawings below illustrate the factory standard sideplate and sleeve mountings for the SMD-401M. The standard "A"
dimensions listed in the table provide adequate space for the mounting of actuators and controls.
If space constraints are a problem the "A" dimension can be varied between 5
3
⁄8 in. (136mm) and 12 in. (305mm).
Sideplate
6 in.
5 in.
A
12 in.**
"A" Dimension
in. (mm)
Standard Maximum
Sleeve
Sideplate
All Dampers* 7 3/16 (183) 12 (305) 6 3/16 (157)
When height is
11 in. (279) or
11 3/16
(284)
12
(305)
10 3/16
(259)
less with OCI
*With the exception of dampers 11 in. (279mm) high or less (12 in.
(305mm)high or less if width is greater than 64 in. (1625mm)) with OCI
option.
** On dampers 11 in. (279mm) high or less (12 in. (305mm)high or less if
width is greater than 64 in. (1625mm)) with OCI option, sideplate is 16 in.
(406mm)
Space Envelopes Required for
Actuators and Accessories
Externally mounted actuators always require space
outside of the damper sideplate or sleeve. The “S”
dimension illustrates the clearance required for various
available actuators.
Sleeve
* For dampers 18 in.(457mm) or more in height these dimensions are 0 in.
1
On dampers less than 18 in. (457mm) high, actuators
may also require clearances above and/or below the
sideplate or sleeve. “B” and “T” dimensions are worst
case clearance requirements for some dampers less
than 18 in. (457mm) high. All damper sizes under 18
in. (457mm) high do not require these worst case
Actuator Type/Model
B* T*
With OCI With OCI
Pneumatic
clearances. If space availability above or below the
damper sleeve is limited, each damper size should be
individually evaluated.
331-2976 2 1/2 in. (64mm) 5 1/4 in. (133mm) 6 in. (152m)
Note: This actuator requires field calibration for the zero and span setting.
S
Transitioned Damper Dimensions
D* +
2 in. (51mm) +T
s
D*
TYPE R
16 in. (406mm)
Min.
21/8 in.
D* + 2 in. (51mm)+T
s
TYPE O
W
*
H*
W*
+ 2 in. (51mm)+T
s
H* + 2 in. (51mm)+T
s
W*
H*
TYPE C
H* + 2 in. (51mm)+T
s
(54mm)
16 in. (406mm)
Min.
21/8 in.
(54mm)
16 in. (406mm)
Min.
W*+ 2 in. (51mm)+T
s
(54mm)
21/8 in.
When a fire/smoke damper is being used in conjunction with round or oval ductwork, the SMD-401M can be supplied in a
factory sleeve with round or oval transitions on both ends of the sleeve. Dampers should be ordered to the duct dimensions.
Drawings below show overall damper size.
These dimensions are furnished approximately
*
approximately
1/8 in. (3mm) undersize.
1
/4 in. (6mm) undersize, except round and oval dimensions which are
Ts = (2)(Sleeve Thickness)
Specifications
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 NFPA 90A, 92A, 92B, 101 and 105 and
further shall be tested, rated and labeled in accordance with
the latest edition of UL Standard 555S. Smoke dampers
shall be of low leakage design qualified to UL 555S Leakage
Class I.
Each damper /actuator combination shall have a UL555S
elevated temperature rating of 250°F (121ºC) minimum and
shall be rated to operate at maximum design airflow at its
installed location. Each damper shall be supplied with an
appropriate actuator installed by the damper manufacturer
at the time of damper fabrication. Damper actuator shall be
(specifier select one of the following) electric type for 24 volt
operation.
Damper blades shall be hollow extruded aluminum airfoil
type with structural reinforcing tube running full length of
each blade. Damper frame shall be galvanized steel formed
into a structural hat channel shape with reinforced corners.
Bearings shall be sintered bronze sleeve type rotating in
extruded holes in the damper frame. Blade edge seals
shall be silicone rubber designed to inflate and provide a
tighter seal against leakage as pressure on either side of
the damper increases. Jamb seals shall be stainless steel
compression type. Damper must be rated for mounting
vertically (with blades running horizontal) or horizontally and
be UL 555S rated for leakage and airflow in either direction
through the damper.
The basis of design is Greenheck Model SMD-401M.
Copyright © 2010 Greenheck Fan Corporation
SMD-401M Rev. 8 December 2010
Loading...