Transitioned Damper Dimensions

When a fire/smoke damper is being used in conjunction with round or oval ductwork, the SMD-301V 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


								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 shall be further 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.

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 304 stainless steel 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 vertical) and be UL 555S rated for leakage and air- flow in either direction through the damper.

The Damper manufacturer's submittal data shall certify all air performance pressure drop data is tested 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.

The basis of design is Greenheck Model SMD-301V.

SMD-301V specifications

The Greenheck Fan SMD-301V is a high-performance, energy-efficient fan that is widely recognized in the HVAC industry for its innovative design and advanced features. This model, part of the SMD series, is engineered to deliver superior airflow while ensuring low energy consumption, making it an ideal choice for various applications such as commercial buildings, industrial facilities, and institutional environments.

One of the main features of the SMD-301V is its direct drive motor design. This configuration eliminates the need for belts and pulleys, reducing maintenance requirements and enhancing reliability. The motor is also specifically designed for high efficiency, which helps to lower operating costs. With this direct drive attribute, Greenheck ensures quieter operation and a more compact physical footprint, which is often necessary in tight installation spaces.

The SMD-301V is equipped with a backward-inclined impeller, a design that enhances performance by optimizing airflow and minimizing noise levels. This impeller type is known for its ability to maintain efficiency under varying airflow conditions, making it suitable for both constant and variable air volume applications. The fan is capable of providing a stable airflow even in challenging environments, which is a significant advantage when dealing with fluctuating demand.

Another significant characteristic of the SMD-301V is its robust construction. Built from high-quality materials, including corrosion-resistant coatings, it is designed to withstand harsh environmental conditions and ensure long life. Additionally, the fan features an integrated control system, allowing for precise adjustments and enhanced performance monitoring. This integration offers users the opportunity to optimize their systems for maximum efficiency and ease of operation.

The SMD-301V meets rigorous industry standards for performance and safety, making it a reliable choice for various applications. Its compliance with Energy Star guidelines aligns with sustainability initiatives, further highlighting its appeal to environmentally conscious organizations.

In summary, the Greenheck Fan SMD-301V stands out due to its advanced engineering, energy-efficient operation, and user-friendly features. Its combination of a direct drive motor, backward-inclined impeller design, and robust construction make it a top choice for anyone seeking reliable ventilation solutions. The integration of modern control technologies ensures optimal performance, making it an essential component for efficient HVAC systems.