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Greenheck Fan SMD-302 Manual De Usuario

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50 in. 
32 in. (813mm)
32 in. (813mm) 64 in. (1626mm)
50 in. 
96 in. (2435mm)
50 in.
100 in. 
 
(1270mm)
32 in. (813mm)
 (2540mm)
 
(1270mm)
32 in. (813mm)
128 in. (2540mm)
(1270mm)
50 in. 
 
(1270mm)
Transitioned Damper 
Dimensions
When a fire/smoke damper is being used in conjunction with round or oval ductwork, the 
SMD-302 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 
1
/
4
 in. (6mm) undersize, 
except round and oval dimensions 
which are approximately 
1
/
8
 in. (3mm) 
undersize.
Ts = (2)(Sleeve Thickness)
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 II.
Each damper /actuator combination shall have a UL555S elevated 
temperature rating of 250°F (121º C) minimum and shall be rated to 
operate at maximum design air flow 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 230) volt operation or pneumatic type for 25 psi 
minimum (30 psi maximum) operation.
Damper blades shall be of the double skin airfoil type and shall have 
an equivalent metal thickness of 14 ga. (2mm) 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. 
Blades shall be completely symmetrical relative to their axle pivot 
point, presenting identical resistance to airflow in either direction or 
pressure on either side of the damper. 
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-302.
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 figures show damper sections and assemblies that have been qualified for operation with a single actuator. 
Larger sizes can be accommodated using multiples of these assembles.
Specifications
D*  +  2 in. (51mm) +T  s 
D* 
TYPE  R 
 
16 in. (406mm) 
Min. 
2 
1 
/ 
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. 
2 
1 
/ 
8
 in. 
(54mm)
16 in. (406mm) 
Min. 
W* +  2 in. (51mm)+T s 
(54mm)
2 
1 
/ 
8
 in.
Single Section
Double Section
Copyright ©2006 Greenheck Fan Corporation
SMD-302 Rev. 4 June 2006