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Catalogues
- Waterside Control Fan Coil Units
- Air Distribution Equipment - Grilles & Diffusers
- Control Panels for Fire & Smoke Applications
- Dampers for Fire & Smoke Applications
- VAV Terminal Units
- Installation Manual for Fire & Smoke Dampers
- Active Chilled Beam - Acticool
Products
Fire & Smoke Protection
2550 Mechanical Release Fire Smoke Dampers
The model 2550 is designed to close and stay closed in a fire situation creating a 4 hour fire rated barrier to stop the spread of fire, smoke and toxic fumes. The 2550 incorporates the new unique interlocking opposed blade design that eliminates the need for blade seals which burn out during fire conditions. The blade profile is of aerodynamic double skin construction, and gives a metal to metal seal, which achieves low leakage performance as stipulated in BS EN1366-2 ES classification for 240 minutes in both horizontal and vertical installations.
The 2550 includes a unique and versatile jackshaft arrangement with a mechanical fusible link rated at 74°C. In alarm condition the power to the actuator is removed closing the blades within 16 seconds. When the temperature is reached the fusible link breaks the connection between the actuator and the blades. The blades are then held in the closed position by the knee-lock mechanism and can not be reopened until the fusible link has been replaced.
The jackshaft arrangement allows multiple section units to be connected and driven by one actuator depending on torque requirements. The 2550 damper is available with spigotted connections. Various installation option’s are available, examples are detailed in our Methods of Installation Manual. This product is flexible and versatile and can be modified to meet most special requirements on size and installation.
• Independently tested to the BS EN1366 -2 test for integrity and leakage requirements achieving an ES240 classification.
• Unique double skin blade design that achieves low leakage tested to British and American standards without the need for synthetic blade seals.
• Closure maintained by the unique “knee-lock” mechanism which prevents blades from reopening the damper.
• Wide range of actuators are available from Belimo, Honeywell and Johnson's to meet most requirements.
• Junction box that allows easy site wiring connection.
• All components fitted to the damper so installation simple and straight forward, therefore no additional modification to ductwork
Control Options
Standard Control - Spring Closed
The actuator without power the blades will be in the closed position and when power applied the blades will fully open. In alarm the power would be removed the damper blades fully close within 16 seconds. When the mechanical fusible link reaches 74°C it breaks breaking the connection with the actuator. The blades would not reopen until the fusible link is replaced.
Spring Open - Fail Safe Closed
The damper without power the blades will be in the open position and when power applied the blades will close fully shut. In alarm the power would be removed and the blades will fully open within 16 seconds until the mechanical fusible link reaches 74°C the blades will instantly shut by breaking the connection to the actuator.
Modulating - Volume Control
The actuators without power the blades will be in the closed position and when power is applied the blades will fully open. From the open position through a signal 0-10 volts the damper blades can be adjusted between fully open and fully closed allowing volume control. In alarm the power is removed closing the blades within 16 seconds. When the mechanical link reaches 74°C it breaks the connection to the actuator.
Blade Indication - Micro switches
To give indication of the blade position to BMS or similar micro switches that can be supplied integral to the actuator or mounted within the damper.
Material Specification
Blades: Double Skin 1.0mm galvanised mild steel as standard, Double skin 1.0 grade 430 stainless steel optional
Frame: 1.6mmm galvanised mild steel standard, 1.6mm grade 430 stainless steel optional
Frame Corners: Die formed corner channels, button locked for strength and rigidity
Casings: 1.2mm galvanised mild steel standard 1.2mm grade 430 stainless steel optional
Casing corners: Welded mitre corners finished with aluminium aerosol spray.
Linkage: External linkage. Enclosed within the frame and out of air stream. Zinc electroplated mild steel.
Bearings: Oil filled sintered bronze up to 200 degrees C
Axles: 12.7mm diameter zinc electroplated mild steel bolted directly through the blade
Jack Shaft: Zinc electroplated mild steel
Top, bottom and side jamb seals: Cambered grade 301 stainless steel
Rectangle Spigotted Models
NDW - Nominal Duct Width
NDH - Nominal Duct Height
Overall Casing Width/Height = Duct Width/Height + 50mm
Minimum Single Section Duct Size: 100mm x 100mm
Maximum Single Section Duct Size: 750mm x 1000mm
For damper sizes below 200mm width or height, the casing length increases. Please contact our Advanced Air sales for full dimensional details.
Circular Spigotted Models
NDD - Nominal Duct Diameter
Overall Casing Width/Height = Duct Diameter + 75mm
Minimum Single Section Duct Size: Ø100mm
Maximum Single Section Duct Size: Ø750mm
For damper sizes below Ø200mm the casing length increases. Please contact our Advanced Air sales for full dimensional details
