Greenheck Fan Smoke Alarm SMD 401M User Manual

SMD-401M  
Smoke Dampers  
Extruded Airfoil Blades  
UL 555S Leakage Class I  
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.  
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  
ICBO Uniform Building Codes  
New York City (MEA listing #260-91-M)  
CSFM California State Fire Marshal  
Leakage (Smoke) Damper Listing (#3230-0981:108)  
RATINgS  
Leakage Class:  
I
Operational Rating: Actual ratings are size dependent.  
Max. Velocity:  
Max. Pressure:  
Temperature:  
up to 2000 fpm (10.2 m/s)  
4 in. wg (1 kPa)  
250°F (121ºC) with all actuators.  
“UL CLASSIFIED (see complete marking on  
product)”  
“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.  
LH  
Linkage:  
Axles:  
Bearings:  
Concealed in jamb.  
12 in. (13mm) dia. plated steel.  
Bronze sleeve type.  
SIzE LIMITATIONS:  
H*  
Minimum Size:  
8 in. W x 8 in. H  
(203mm W x 203mm H)  
RH  
Maximum Size:  
Single Section:  
36 in. W x 36 in.H  
(914mm W x 914mm H)  
W*  
Multi Section:  
144 in. W x 36 in. H  
(3658mm W x 914mm H)  
Optional Features:  
• Galvanized steel sleeves.  
• Stainless steel bearings  
*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.  
• OCI (Open closed indication switches)  
• Electric or pneumatic actuators to accomplish smoke  
management and system functions.  
• POC Retaining angles  
• Smoke detector  
• Momentary switch  
Transitions (R, C, O)  
• Sealed transitions and sleeves  
 
Application Data  
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 38 in. (136mm) and 12 in. (305mm).  
Sideplate  
1
1
/2" max.  
Sleeve  
"A" Dimension  
in. (mm)  
Sleeve  
Standard  
Sideplate  
Maximum  
12 (305)  
33/4  
"
All Dampers*  
7 3/16 (183)  
6 3/16 (157)  
When height is  
11 in. (279) or  
less with OCI  
11 3/16  
(284)  
12  
(305)  
10 3/16  
(259)  
6 in.  
*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.  
Varies  
53/8  
"
** 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
5"  
Sleeve Length  
5 in.  
12 in.**  
A
T*  
Space Envelopes Required for  
S
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.  
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  
clearances. If space availability above or below the  
damper sleeve is limited, each damper size should be  
individually evaluated.  
B*  
B*  
With OCI  
T*  
Actuator Type/Model  
S
With OCI  
Pneumatic  
2 1/2 in. (64mm) 5 1/4 in. (133mm)  
331-2976  
6 in. (152m)  
* For dampers 18 in.(457mm) or more in height these dimensions are 0 in.  
1
Note: This actuator requires field calibration for the zero and span setting.  
 
Transitioned Damper Dimensions  
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.  
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 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.  
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.  
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.  
The basis of design is Greenheck Model SMD-401M.  
Copyright © 2007 Greenheck Fan Corporation  
SMD-401M Rev. 5 April 2007  
 

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