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The BTT25-M circular fire dampers serve as a shut-off device for air ducts in case of fire. When the damper is closed, the spread of fire and the spread of smoke through the pipe from one fire section to another is prevented. Activation of the damper in case of fire is ensured by a 72 °C thermal fuse as standard. Closure of the damper after activation of the thermal fuse of the thermoelectric actuator is ensured by the closing spring of the actuator. The damper casing, which has a series of perforations to prevent heat transfer, is made of galvanised steel sheet. The damper is fitted with a single-row lip seal. The damper sheet is made of calcium silicate plates. The blade rotates on steel pins mounted in bronze bushings. The actuator is fitted with two limit switches. The flapper is designed to minimize pressure loss.
Features
CE marking according to EN 15650 certification, classification according to EN 13 501-3 is EI 90/120 S. Tested according to EN 1366-2 at 500 Pa.
Use
The flaps are suitable for installation in all common building structures such as rigid wall structures, lightweight partitions or rigid ceiling structures. The flap can be installed in fire separating construction with the axis of the sheet vertically or horizontally. Fire dampers can only be used for air free of mechanical and chemical impurities. Maximum flow velocity 10 m/s.
Mounting
The fire dampers are designed for circular air ducts from DN100 to DN315. The axis of the damper must be inside the fire compartmentation structure.
Caution
Fire dampers are dedicated fire safety devices (see the Ministry of Interior decree on fire prevention), therefore it is necessary to comply with the prescribed rules (training of installers, regular operational checks, etc.). Ask for information!
Accessories
- RDK pipe inspection element
Adherence to these instructions should not pose any safety, health or environmental risks in accordance with EC directives (CE marked). The same applies to other products used in the device or during installation. Consider the following warnings:
• Observe the safety instructions to prevent damage to the device or personal injury.
• The technical information in this manual must not be changed.
• It is forbidden to interfere with the motor of the device.
• In order for the device to comply with EC directives, the device must be connected to the mains in accordance with the applicable regulations.
• The device must be installed in such a way that under normal operating conditions it cannot come into contact with any moving part and / or live part.
• The device complies with the applicable regulations for the operation of electrical equipment.
• Always disconnect the device from the power supply before carrying out any work on it.
• Appropriate tools must be used when handling or maintaining the device.
• The device must only be used for the purposes for which it is intended.
• This appliance is not intended for use by children under 8 years of age and persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a responsible person. The user must ensure that children do not play with the device. Cleaning and maintenance of the appliance must not be carried out by children without supervision.
