Application data OFsd-311, Specifications

Application data

OFsd-311

Actuator Space Envelopes

The drawing below and corresponding table show the minimum dimensions required for internal actuator mounting on OFSD-311s. The standard mounting locations provide enough space for the mounting of actuators and controls plus allowing space for a grille and duct connection (see Sleeve Length below).

Actuator Space	Honeywell
Actuator Space	ML-4XXX series	MS-4120 series
Envelopes	ML-4XXX series	MS-4120 series
Envelopes	MS4XXX series
	MS4XXX series
‘X’ Dimension	5.88 in.(149mm)	5.88 in. (149mm)
Minimum Width	12 in. (305mm)	12 in. (305mm)
Minimum Height	12 in. (305mm)	12 in. (305mm)

Sleeve Information

			3FHJTUFS
	‘Sleeve Length’ = Depth of Grille (or Register)		JODMVEFT
	‘Sleeve Length’ = Depth of Grille (or Register)		HSJMMFBOE
	+ X (Actuator: see table above)		0#%
	+ X (Actuator: see table above)
	+ 5 in. [127mm] (Damper Width)
	+ 1.25 in. [31.8mm] (for duct connection)		'JSF
	(round up to nearest length: 14 in., 16 in., 18 in.,		'JSF
	(round up to nearest length: 14 in., 16 in., 18 in.,		SBUFE
	or 20 in. [356, 406, 457, 508mm])		CBSSJFS
	or 20 in. [356, 406, 457, 508mm])


	‘Sleeve Gauge’ = 16 Ga. or 20 Ga. (1.5mm or 1mm)

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Wall Opening Sizing

To accommodate for sleeve and thermal blanket thickness, the wall opening must be oversized by 3⁄8 in. (9.5mm) as shown. For example, if the nominal damper size required is 18 in. x 14 in. (457mm x 356mm), the wall opening size needs to be 18 3⁄8 in. x 14 3⁄8 in. (467mm x 365mm). The damper itself is undersized 1⁄4 in. (6mm) on each dimension for an actual damper size of 17 3⁄4 in. x 13 3⁄4 in. (451mm x 349mm). This is also the inside dimensions of the sleeve (for grille considerations).

Fire Smoke Damper

WallWith Sleeve And

Thermal Blanket

Nominal

Damper

Height + 3/8 in.

Nominal Damper

Width + 3/8 in.

Specifications

Combination Fire Smoke Dampers meeting the following specifica- tions shall be furnished and installed where shown on plans and/or as described in schedules. Dampers shall meet the requirements of NFPA 80, 90A, 92A, 92B, 101 & 105 and further shall be tested, rated and labeled in accordance with the latest edition of UL Standards 555 and 555S. Dampers shall have a UL555 fire rating of 1½ hours and be of low leakage design qualified to UL 555S Leakage Class I.

Each damper shall be UL qualified for mounting out of the plane of the wall to allow ‘through the grille’ access to actuator and controls. Each damper /actuator combination shall have a UL555S elevated temperature rating of 250° F (121ºC) minimum and shall be opera- tional and dynamic 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 fol- lowing) electric type for 120 (24 or 230) volt operation. Each damper shall be UL555S rated for leakage and airflow in either direction through the damper.

Damper blades shall be of the double skin airfoil type and shall have an equivalent thickness of 14 ga. (2mm) 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.

Each damper shall be supplied with a factory mounted sleeve; sleeve shall be wrapped with UL approved thermal barrier material. Each damper shall be supplied with a 165°F (74ºC) RRL.

The basis of design is Greenheck Model OFSD-311.

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.