Greenheck Fan Ventilation Hood SMD 401 User Manual

Model SMD-401  
Smoke Dampers  
APPLICATION  
Model SMD-401 is a class I leakage rated smoke damper. High strength,  
streamlined extruded airfoil blades insure lowest resistance to airflow in  
HVAC systems with velocities to 3000 fpm (15.2 m/s) and 6 in. wg (1.5  
kPa). Model SMD-401 may be installed vertically (with blades running  
horizontal) or horizontally and is rated for airflow and leakage in either  
direction.  
Extruded Airfoil Blades  
UL 555S Leakage Class I  
Model SMD-401 meets the requirements for smoke  
dampers established by:  
National Fire Protection Association  
RATINgS  
NFPA Standards 92A, 92B, 101 & 105  
Leakage:  
UL 555S leakage class I. Leakage  
rated in both directions  
IBC International Building Codes  
New York City (MEA listing #260-91-M)  
California State Fire Marshall  
Listing#: 3230-0981:108 (smoke)  
Velocity:  
Operational rated to 3000 fpm  
(15.2 m/s) for sizes up to  
48 in. W x 108 in. H or 144 in. H x 36 in. H  
(1219mm x 2743mm) or  
(3658mm x 914mm) or  
2000 fpm (10.2 m/s) for sizes  
greater than that. Rating is for  
airflow in either direction through  
damper.  
250°F (121°C) with all actuators.  
6 in. (1.5 kPa)  
“UL CLASSIFIED (see complete marking on  
product)”  
Temperature:  
Maximum Pressure:  
“UL CLASSIFIED to Canadian safety standards  
(see complete marking on product)”  
Standard 555S (Listing #R13317)  
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:  
Seals:  
Airfoil shape constructed of heavy  
gauge extruded aluminum.  
Structural reinforcement through  
the entire length.  
Extruded silicone rubber blade  
seals. Flexible stainless steel jamb seals.  
Concealed in jamb.  
12 in. (13mm) dia. plated steel.  
Bronze sleeve type  
Linkage:  
Axles:  
Bearings:  
SIzE LIMITATIONS:  
Minimum Size:  
Maximum Size:  
Single Section:  
8 in. W x 8 in. H (203mm x 203mm)  
LH  
H*  
48 in. W x 60 in.  
(1219mm W x 1524mm H)  
192 in. W x 72 in. H  
Multiple Section:  
(4877mm W x 1829mm H) or  
48 in. W x 288 in. H  
W*  
(1219mm W x 7315mm H) or  
384 in. W x 36 in. H  
(9754mm W x 914mm H)  
RH  
*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.  
Optional Features:  
• Galvanized steel sleeves  
• Stainless steel bearings  
• OCI (Open closed indication switches)  
• Electric or pneumatic actuators to accomplish smoke  
management and system functions.  
• POC retaining angles  
• Smoke detector  
• Momentary switch  
Transformer  
 
Application Data  
Damper Sideplate and Sleeve Dimensional Data  
The drawings below illustrate the factory standard sideplate and sleeve mountings for the SMD-401. The standard "A" dimen-  
sions 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 38 in. (136mm) and 12 in. (305mm).  
Sleeve  
Sideplate  
1
1
/2" max.  
"A" Dimension  
Sleeve  
in. (mm)  
Sideplate  
Standard  
Maximum  
12 (305)  
All Dampers*  
7 3/16 (183)  
6 3/16 (157)  
33/4"  
When height is  
11 in. (279) or  
less with OCI  
11 3/16  
(284)  
12  
(305)  
10 3/16  
(259)  
6 in.  
Varies  
53/8"  
*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.  
5 in.  
A
5"  
Sleeve Length  
** 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)  
A
12 in.**  
T*  
Space Envelopes Required for  
Actuators and Accessories  
S
Externally mounted actuators always require space  
outside of the damper sideplate or sleeve. The “S” dimen-  
sion illustrates the clearance required for various available  
actuators.  
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 clear-  
ance requirements for some dampers less than 18 in.  
(457mm) high. All damper sizes under 18 in. (457mm) high  
do not require these worst case clearances. If space avail-  
ability above or below the damper sleeve is limited, each  
damper size should be individually evaluated.  
B*  
Actuator  
Type/Model  
B*  
T*  
S
With OCI  
With OCI  
120 Volt AC  
5 1/4 in. (133mm) 3/4 in. (19mm)  
ML4XXX Series Honeywell  
MS4XXX Series Honeywell  
MS4120 Series Honeywell  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
3/8 in. (10mm)  
3/8 in. (10mm)  
24 Volt AC  
5 1/4 in. (133mm) 3/4 in. (19mm)  
ML8XXX Series Honeywell  
MS8XXX Series Honeywell  
MS8120 Series Honeywell  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
6 in. (152mm)  
3/8 in. (10mm)  
3/8 in. (10mm)  
Pneumatic (psi)  
331-4551 Siemens  
331-2976 Siemens  
MK2-7121 Invensys  
1 in. (25mm)  
6 1/4 in. (159mm)  
6 1/2 in. (165mm)  
2 3/8 in. (60mm)  
3 3/4 in. (95mm)  
12 1/8 in. (308mm) 9 1/4 in. (235mm)  
16 1/2 in. (419mm) 10 in. (254mm)  
* For dampers 18 in. (457mm) or more in height these dimensions are 0 in. .  
 
Damper Sizing Information  
Dampers larger than maximum single section size are supplied as a factory  
assembly of two or more sections of equal size.  
The following figure shows the size damper section that has been qualified  
for operation with a single actuator. Larger sizes can be accommodated using  
multiples of these assembles.  
ꢀꢁꢂJOꢃ  
ꢄꢅꢄꢆNNꢇ  
ꢈꢉꢂJOꢃ  
ꢄꢊꢅꢀNNꢇ  
Transitioned Damper When a fire/smoke damper is being used in conjunction with round or oval ductwork, the  
SMD-401 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.  
Dimensions  
D*+  
2 in. (51mm) +T  
s
W*+ 2 in. (51mm)+T  
s
W*+ 2 in. (51mm)+T  
s
D*+ 2 in. (51mm)+T  
s
H*+ 2 in. (51mm)+T  
H*+ 2 in. (51mm)+T  
s
s
H*  
H*  
21/8in.  
21/8in.  
(54mm)  
21/8in.  
(54mm)  
(54mm)  
*
W
W*  
D*  
16 in. (406mm)  
Min.  
16 in. (406mm)  
Min.  
16 in. (406mm)  
Min.  
TYPE R  
TYPE O  
TYPE C  
These dimensions are furnished approximately 1/4 in. (6mm) undersize, except round and oval dimensions which are approximately 1/8 in. (3mm) undersize.  
*
T
= (2)(Sleeve Thickness)  
s
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 92A, 92B, 101, & 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.  
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.  
Each damper/actuator combination shall have a UL555S  
elevated temperature rating of 250°F (121°C) 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 120, 24,  
or 240 Volt operation or pneumatic type for 25 psi minimum  
(30 psi maximum operation.  
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-401.  
Copyright ©2007 Greenheck Fan Corporation  
SMD-401 Rev. 5 April 2007  
 

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