Greenheck Fan SMD-302 dimensions Application, UL555S Leakage Rating, Standard Construction

SMD-302

Application

Model SMD-302 is a leakage rated smoke damper with extremely low leakage. The SMD-302 serves the function of both a control damper and smoke damper. High strength airfoil blades insure lowest resistance to airflow in HVAC systems with velocities to 3000 fpm (15.2m/s) and 4 in. wg (1.0 kPa) Model SMD-302 may be installed vertically (with blades running horizontal) or horizontally and is rated for airflow and leakage in either direction.

UL555S Leakage Rating

Leakage Class:	II
Operational Rating	3000 fpm (15.2 m/s)
Maximum Velocity:
Maximum Pressure:	4 in. wg (1 kPa)
Maximum Temperature:	350ºF (177ºC) depending on
	the actuator

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

Smoke Dampers

Steel Airfoil Blades

UL 555S Leakage Class II

Model SMD-302 meets the requirements for smoke dampers established by:

National Fire Protection Association

NFPA Standards 92A, 92B, 101 & 105

IBC International Building Codes

New York City (MEA listing #260-91-M)

CSFM California State Fire Marshal

Leakage (Smoke) Damper Listing (#2330-0981:104)

“UL CLASSIFIED (see complete marking on product)”

“UL CLASSIFIED to Canadian safety standards (see complete marking on product)”

Standard 555S (Listing #R13317)

	maximize free area and
	performance.
Blades:	Double skin airfoil shape of
	galvanized steel with full length
	structural reinforcement. 14 ga.
	(2 mm) equivalent thickness.
Seals:	Extruded silicone rubber blade
	seals. Flexible stainless steel jamb
	seals.
Linkage:	Concealed in jamb.
Axles:	1/2 in. (13mm) dia. plated steel.
Bearings:	Bronze sleeve type.
Size Limitations:
Minimum Size:	8 in. W x 6 in. H
Maximum Size:	(203mm W x 152mm H)
Single Section:	32 in. W x 50 in. H
	(813mm W x 1270mm H)
Multiple Section;	128 in. W x 100 in. H
	(3251mm W x 2540mm H) or
	256 in. W x 50 in. H
	(6502mm W x 1270mm H)

Optional Features:

• Galvanized steel sleeves.

• Stainless steel bearings

• OCI (Open closed indication switches)

• Electric or pneumatic actuators to accomplish smoke

R

LH

Greenheck Fan Corporation certifies that the

model SMD-302 shown herein is licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 511 and comply with the requirements of the

AMCA Certified Ratings Programs. The AMCA Certified Ratings Seal applies to air

performance ratings only.

H*

management and system functions.

• Transitions (R, C, O)

• POC retaining angles

• Momentary Switch

• Smoke detectors

• Sealed transitions and sleeves

W*

RH

*W&H dimensions furnished approximately 1/4 in. (6mm) undersize. Right hand drive is shown. Left hand drive is available upon request. Damper also may be rotated 180° in the field for opposite side drive.

(Add sleeve thickness for overall sleeved damper dimension)

Installation instructions available at www.greenheck.com