Greenheck Fan dimensions Model OFSD-311, Out of Wall Combination Fire Smoke Dampers, Ratings

				Model OFSD-311
Application	Out of Wall Combination Fire Smoke Dampers
Model OFSD-311 is an ‘out of the wall’ high performance combination				Steel Airfoil Blades
fire smoke damper with class I leakage. OFSD-311 is approved for				UL 555S Leakage Class I
use in walls, partitions, and floors with fire resistance ratings less				UL555 11⁄2 Hour Fire Resistance Rating
than 3 hours. Removal of wall grille allows access to actuator and				Horizontal or Vertical Mount
other components. High strength airfoil blades insure the lowest
resistance to airflow in HVAC systems with velocities to 3000 fpm
		Model OFSD-311 meets the requirements for fire
(15.2 m/s) and pressures to 4 in. wg (1 kPa). Model OFSD-311 shall		dampers, smoke dampers and combination fire
be installed vertically (with blades running horizontal) or horizontally		smoke dampers established by:
and is rated for airflow and leakage in either direction.		National Fire Protection Association
Ratings				NFPA Standards 80, 90A, 92A, 92B, 101 & 105
		IBC International Building Codes
UL555 Fire Resistance Rating:		ICBO Uniform Building Codes
Fire Rating:	11⁄2 hours in walls
		SBCCI Standard Building Codes
Dynamic Closure Rating: Actual ratings are size dependent
		CSFM California State Fire Marshal
Max. Velocity:	up to 3000 fpm (15.2 m/s)
Max. Pressure:	4 in. wg (1 kPa) - differential pressure		Fire Damper Listing (#3225-0981:103)
UL555S Leakage Rating:			Leakage (Smoke) Damper Listing (#3230-0981:104)
Leakage Class:	I	New York City (MEA listing #260-91-M)
Operational Rating:	Actual ratings are size dependent
Max. Velocity:	up to 3000 fpm (15.2m/s)
			“UL CLASSIFIED (see complete marking on
Max. Pressure:	4 in. wg (1 kPa)
			product)”
Max. Temperature:	350ºF (177ºC)- depending upon the
			“UL CLASSIFIED to Canadian safety standards
	actuator
			(see complete marking on product)”
Standard Construction				Standard 555 & 555S (Listing #R13317)
Frame:	5 in. x 1 in. (127mm x 25mm)
	galvanized steel hat channel with			Greenheck Fan Corporation certifies that the
	reinforced corners. A low profile			model OFSD-311 shown herein is licensed to
	head and sill are used on sizes less			bear the AMCA Seal. The ratings shown are
	than 17 in. (432mm) high.			based on tests and procedures performed in
Blades:	Double skin airfoil shape of			accordance with AMCA Publication 511 and
				comply with the requirements of the AMCA
	galvanized steel with full length
			R	Certified Ratings Programs. The AMCA Certified
	structural reinforcement. 14 ga.			Ratings Seal applies to air performance ratings
	(2mm) equivalent thickness.			only.
Seals:	Extruded silicone rubber blade seals.
	Flexible stainless steel jamb seals.
Linkage:	Concealed in jamb
Closure Device:	RRL 165°F (74ºC)
Axles:	1⁄2 in. (13mm) dia. plated steel
Bearings:	Bronze sleeve type
Sleeve:	Galvanized; wrapped with thermal
	blanket
Size Limitations:	12 in.W x 12 in. H
Minimum Size:
Maximum Size:	(305mm x 305mm)
Single section:	32 in. W x 30 in. H
	(813mm W x 762mm H)
Multiple Section:	36 in.W x 36 in. H
	(914mm x 914mm)

Optional Features:

•POC retaining Angles

•RRL/OCI (open closed indication switches)

•165ºF (74ºC), 212ºF (100ºC), 250ºF (121ºC), 350ºF (177ºC) RRL’s available

•TOR (remote override allows damper to perform smoke

management functions during fire emergency.)	* W & H dimensions furnished approximately 1⁄4 in. (6mm) undersize.
• Electric or pneumatic actuators to accomplish smoke	(Add blanket thickness (1⁄8 in.[3mm]) and sleeve thickness for
management and system functions.	overall sleeved damper dimension)
	Oversize wall opening as follows:
• Smoke detectors
	Nominal damper size plus 3⁄8 in.(9.5mm) (see Page 6)
• Momentary switch
• PRV (pneumatic relief valve)
• Security bars	Installation instructions available at www.greenheck.com
•Sealed transition and sleeves