X
Y
Grille
(Supplied by
others)
Factory supplied thermal
blanket around sleeve
Fire rated barrier
Combination Fire
Smoke Damper
7 1⁄2
"
Max.
5 in.
A
Sleeve Length
Actuator Space Envelopes
The drawing below and corresponding table show the minimum dimensions
required for internal actuator mounting on OFSD-212s. 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).
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).
Application data
OFSd-212
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)
(round up to nearest length: 14 in., 16 in., 18 in.,
or 20 in. [356, 406, 457, 508mm])
‘Sleeve Gauge’
= 16 Ga. or 20 Ga. (1.5mm or 1mm)
Nominal Damper
Width +
3
8
in.
Nominal
Damper
3
/
8
in.
Wall
Fire Smoke Damper
With Sleeve And
Thermal Blanket
/
Combination Fire Smoke Dampers meeting the following
specifications 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 II.
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
performance 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 latest 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-212.
Specifications
Copyright ©2006 Greenheck Fan Corporation
OFSD-212 Rev 3 June 2006
Actuator Space
Envelopes
Honeywell
ML-4XXX series
MS4XXX series
MS4120 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)
