Damper Sizing Information, Specifications

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 maximum damper section size and assembly configurations for multi-section dampers.

Multi Section

Single Section

30”

24” 48”

24”

Transitioned Damper Dimensions

D*+ 2 in. (
D*+ 2 in. (	51mm) +T	s

When a fire/smoke damper is being used in conjunction with round or oval ductwork, the SEFSD-211 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.

			W*+	2 in. (51mm)+T
			W*+		s
W*+ 2	in. (51mm)+T	s			s
		s

D* + 2 in. (51mm)+T
	s
	s	H*+ 2 in. (51mm)+T	s
		H*+ 2 in. (51mm)+T	s
		21/8 in.
		(54mm)
		(54mm)

16 in. (406mm)	D*	16 in. (406mm)
16 in. (406mm)		16 in. (406mm)
Min.		Min.

TYPE R

	H* + 2 in. (51mm)+T	s
	H*	s
21/8 in.	H*
21/8 in.
(54mm)

16 in. (406mm) Min.

TYPE O

21/8 in. H*

(54mm)

TYPE C

Specifications

*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)

Combination Fire 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 the latest edition of NFPA 80, 90A, 92A, 92B, 101, & 105 and further shall be tested in accordance with the latest edition of UL Standards 555 and 555S. Dampers shall have a UL 555 fire rating of 1½ hours and be of low leakage design qualified to UL555S leakage class I.

Each damper /actuator combination shall have a UL555S elevated temperature rating of 250°F (121°C) minimum and shall be operational and dynamic 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.

The Damper Manufacturers submittal data shall certify all air performance pressure drop data is licensed in accordance with the AMCA Certified Ratings Program for Test Figures 5.2, 5.3 and 5.5. Damper air performance data shall be developed in accordance with

the latest edition of AMCA Standard 500-D. Dampers shall be labeled with the AMCA Air Performance Seal.

Damper blades shall be 16 ga. (1.5mm) 316 stainless steel 3V type with three longitudinal grooves for reinforcement. Blades shall be completely symmetrical relative to their axle pivot point, presenting identical resistance to airflow and operation in either direction through the damper (blades that are non-symmetrical relative to their axle pivot point or utilize blade stops larger than 1/2 in. [13mm] are unacceptable). Damper frames shall be 316 stainless steel formed into a structural hat channel shape with reinforced corners. Bearings shall be 316 stainless sleeve type rotating in extruded holes in the damper frame. Jamb seals shall be stainless steel compression type.

All UL 555 and 555S Dynamic Closure Ratings, Operational Ratings and Leakage Ratings shall be qualified for airflow and pressure in either direction through the damper. UL ratings shall allow for mounting damper vertically (with blades running horizontal) or horizontally.

Basis of design is Greenheck Model SEFSD-211.

SEFSD-211 specifications

The Greenheck Fan SEFSD-211 is a high-performance, energy-efficient fan specifically designed for various applications in the commercial and industrial sectors. Renowned for its robust construction and reliability, the SEFSD-211 is engineered to provide optimal airflow while minimizing noise levels and energy consumption.

One of the standout features of the SEFSD-211 is its advanced direct drive motor technology. This system reduces the need for belts and pulleys, leading to lower maintenance requirements and increased efficiency. The direct drive motor also operates at a consistently high performance level, improving the fan's overall reliability and lifespan. The fan is equipped with a totally enclosed fan-cooled (TEFC) motor, ensuring durability in demanding environments.

The SEFSD-211 excels in energy efficiency, achieving high CFM (cubic feet per minute) ratings while operating at lower horsepower. This energy-efficient design not only contributes to reduced operational costs but also meets or exceeds industry regulations for energy performance. Furthermore, the fan is designed to integrate seamlessly with building management systems, allowing for real-time monitoring and control to maximize operational efficiency.

Noise reduction is a critical consideration in building design, and the SEFSD-211 addresses this with its acoustic treatment options. The fan features a sound-dampening design that minimizes vibrations and reduces audible sound levels, making it suitable for applications in noise-sensitive environments like schools, hospitals, and offices.

Another key characteristic of the SEFSD-211 is its versatile installation options. It can be mounted in various configurations, including horizontal and vertical orientations, making it adaptable to a range of fan layouts and airflow requirements. The fan’s compact design allows it to be easily integrated into existing systems without requiring extensive modifications.

Furthermore, the SEFSD-211 is built with materials that endure harsh conditions. The fan housing is constructed from high-quality galvanized steel, and optional coatings are available for additional corrosion resistance. This durability ensures long-lasting performance even in challenging environments, making it an excellent choice for demanding industrial applications.

Overall, the Greenheck Fan SEFSD-211 combines innovative technology with versatility and durability. Its energy efficiency, low noise levels, and adaptability to various environments make it a leading choice for professionals seeking reliable and effective ventilation solutions in commercial and industrial settings.