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 112 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:

112 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:

12 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 14 in. (6mm) undersize.

• Electric or pneumatic actuators to accomplish smoke

(Add blanket thickness (18 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 38 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

 

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

OFSD-311 specifications

The Greenheck Fan OFSD-311 is a versatile and efficient solution designed for a variety of commercial and industrial ventilation applications. As a part of the renowned Greenheck product line, the OFSD-311 embodies cutting-edge technology and thoughtful engineering, ensuring optimal performance and energy efficiency in demanding environments.

One of the main features of the OFSD-311 is its robust construction. This fan is designed with a heavy-gauge steel housing that enhances durability and resistance to corrosion. It is particularly suitable for applications where exposure to harsh environmental conditions is a concern. The fan's design also includes large access doors, simplifying maintenance and inspections.

The OFSD-311 utilizes a direct drive system, which offers several advantages over traditional belt-driven fans. This direct drive mechanism reduces wear and tear on components, leading to lower maintenance costs and enhanced reliability. Additionally, the elimination of belts means reduced noise levels, making the OFSD-311 an excellent choice for noise-sensitive applications.

Efficiency is another hallmark of the OFSD-311. Equipped with high-efficiency motors, this fan minimizes energy consumption while delivering impressive airflow performance. Greenheck's commitment to sustainability is reflected in this model, as it meets or exceeds industry efficiency standards, contributing to reduced operational costs and a lower carbon footprint.

The OFSD-311 is designed with an aerodynamic fan wheel that optimizes airflow. This design not only enhances performance but also contributes to quieter operation, an essential factor in commercial spaces such as schools, hospitals, and office buildings. The fan's adjustable speed options allow for flexible performance tuning based on the specific requirements of the application, making it adaptable for varying ventilation needs.

Safety features are also integrated into the OFSD-311. The fan is equipped with thermal overload protection to prevent overheating and potential damage. Additionally, the models can be equipped with optional safety screens and guards to ensure safe operation in environments where particulate matter may be present.

In summary, the Greenheck Fan OFSD-311 stands out as a reliable, efficient, and adaptable solution for commercial and industrial ventilation needs. With its durable construction, direct drive system, high-efficiency operation, and thoughtful safety features, it is designed to deliver excellent performance while contributing to sustainability efforts in building management. Whether for new installations or replacements in existing systems, the OFSD-311 is a top choice for engineers and facility managers seeking quality and efficiency in ventilation technology.