Greenheck Fan Application Data OFSD-211, Actuator Space Envelopes, Sleeve Information

Application Data OFSD-211

Actuator Space Envelopes

The drawing below and corresponding table show the minimum dimensions required for internal actuator mounting on OFSD-211s. 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).

Factory supplied thermal blanket around sleeve

Actuator Space	Honeywell
	ML-4XXX series	MS4120 series
Envelopes			Grille
	MS4XXX series
			(Supplied by
'X' Dimension	5.88 in. (149mm)	5.88 in. (149mm)	others)
Minimum Width	12 in. (305mm)	12 in. (305mm)
Minimum Height	12 in. (305mm)	12 in. (305mm)
Sleeve Information
‘Sleeve Length’ = Depth of Grille (or Register)
	+ X (Actuator: see table above)
	+ 5 in. [127mm] (Damper Width)
	+ 1.25 in. [31.8mm] (for duct connection)		Fire rated barrier
	(round up to nearest length: 14 in., 16 in., 18 in.,
	or 20 in. [356, 406, 457, or 508mm])

X
7	1 "	5 in.
	⁄2
Max.
A

Sleeve Length

Combination Fire Smoke Damper

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

Wall Opening Sizing

To accommodate for sleeve and thermal blanket thickness,	Wall
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

With 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 /actuator combination shall have a UL555S elevated temperature rating of 250°F (121°C) minimum and shall be operational 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 following) electric type for 120 (24 or 230) volt operation.

Damper blades shall be 16 ga. (1.5mm) galvanized steel 3V type with three longitudinal grooves for reinforcement. 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.

The Damper Manufacturer's submittal data shall certify all air perfor- mance pressure drop data is licensed 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 lat- est edition of AMCA Standard 500-D. Dampers shall be labeled with the AMCA Air Performance Seal.

Damper must be rated for mounting vertically (with blades running horizontal) or horizontally and be UL 555S rated for leakage and airflow in either direction through the damper. Each damper shall be supplied with a 165°F (74°C) RRL.

The basis of design is Greenheck Model OFSD-211.

Copyright ©2006 Greenheck Fan Corporation OFSD-211 Rev 3 June 2006