Application Data |
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Actuator Space Envelopes
The drawing below and corresponding table show the minimum dimensions required for internal actuator mounting on
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Actuator Space | Honeywell | ||
Envelopes | |||
MS4XXX series |
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‘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
‘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)
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).
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Wall
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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 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 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 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. 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
Copyright ©2006 Greenheck Fan Corporation
