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.

Double Section

Single Section

	50 in.
50 in.	(1270mm)	(
50 in.
(1270mm)
	32 in. (813mm)	64 in. (1626mm)
	32 in. (813mm)

Transitioned Damper Dimensions

When a fire/smoke damper is being used in conjunction with round or oval ductwork, the SMD-202 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. (
D*+ 2 in. (	51mm) +T	s				W*+	2 in. (51mm)+T
							2 in. (51mm)+T
								s
			W*+ 2	in. (51mm)+T	s			s
			W*+ 2	in. (51mm)+T

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

21/8 in. H* (54mm)

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

21/8 in. H*

(54mm)

16 in. (406mm) Min.

		W*
	16 in. (406mm)	16 in. (406mm)
	Min.	16 in. (406mm)
	Min.	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. 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 92A, 92B, 101 & 105 and further shall be tested, rated and labeled in accordance with the latest edition of UL Standards 555S. Dampers shall have a low leakage design qualified to UL555S Leakage Class II.

Each damper /actuator combination shall have a UL555S elevated temperature rating of 250°F (121°C) minimum and shall be operational 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 16 ga. (1.5mm) galvanized steel 3V type with three longitudinal grooves for reinforcement. 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.

The Damper Manufacturer's 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 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-202.

SMD-202 Rev 4 June 2006

SMD-202 specifications

The Greenheck Fan SMD-202 represents a cutting-edge solution in the world of ventilation and airflow management. Known for its exceptional performance and reliability, this fan model is a prime choice for various commercial and industrial applications. With a focus on energy efficiency, durability, and ease of installation, the SMD-202 has garnered attention for its innovative features and superior technology.

One of the standout characteristics of the SMD-202 is its efficient design. Engineered with a backward-inclined centrifugal blade design, this fan minimizes turbulence and maximizes airflow, ensuring that environments remain well-ventilated while consuming less energy. The SMD-202 operates quietly, thanks to its high-efficiency motor and precision balancing—features that make it ideal for applications where noise reduction is a priority.

The fan’s construction includes high-quality materials, which enhance durability and ensure a long service life. With a robust housing and an option for corrosion-resistant finishes, the SMD-202 is suitable for various environments, including those prone to moisture and chemical exposure. Additionally, the fan is designed for ease of maintenance, with access points that facilitate routine checks and repairs.

Equipped with advanced technologies, the SMD-202 offers exceptional versatility. It comes with variable speed drives, allowing users to adjust the airflow to meet specific requirements. This adaptability not only optimizes energy usage but also enhances comfort levels in occupied spaces. Furthermore, the fan can be integrated into existing building management systems, promoting seamless operation and monitoring.

Safety is also a top priority in the design of the SMD-202. The fan features thermal protection to prevent overheating and ensure operational safety. Additionally, it adheres to stringent industry standards, making it a reliable choice for commercial and industrial installations.

In summary, the Greenheck Fan SMD-202 embodies the perfect blend of efficiency, durability, and advanced technology. Its innovative features and reliable performance make it an excellent choice for a diverse range of ventilation needs, setting a benchmark in the industry for quality and effectiveness. Choosing the SMD-202 ensures that businesses can maintain optimal air quality while benefiting from lower energy costs and reduced maintenance efforts.

Greenheck Fan SMD-202 Damper Sizing Information, Transitioned Damper Dimensions, Specifications

Models: SMD-202