The system enables automatic or manual (with the use of an emergency push button) opening of the roof window (performing the function of the smoke flap) in order to expel the excess of smoke and toxic gasses emitted during the fire. Above all it enables the avenues of retreat from the building to be smoke free and thus makes people evacuation from the building easier. It also helps to localise the source of the fire and allows faster fire extinguishing. When the smoke, which comes from the fire in the room, is noticed by the smoke sensor the signal is sent to the smoke ventilation unit and the motor opening the window is put into motion. If the fire is noticed prior to the fire reaction sensor, the system can be started manually by pressing the fire alarm button. Additionally, the system enables daily ventilation of the room by opening the window with a special ventilation button. The system closes the window automatically after the fixed ventilation period of the room has passed.

With the functioning       ventilation system                   Effect of smoke              screening              as a result of small              capacity of ventilation

Installation

To install the smoke ventilation system, the control unit RZN 4402K has to be connected (with the use of two-core cable) to the supply unit (230 V). Next the control unit RZN4402K with different cables has to be connected with:

• Smoke sensor OSD23 – 2 x 1 m²
• Chain motor KA 21/500 (KA21/600) - 3 x 1.0 mm²,
• Alarm push button RT42 – 5 x 1 mm²
• Ventilation push button – 3 x 1 mm²

The quantities of the cable are supplied according to the client’s needs. The system of electric connections is described in the fitting instructions of the smoke ventilation unit and included in the package. Only qualified electricians are authorised to install and maintain such systems. In order to secure proper functioning, the system should be checked every six months. All elements of the system are certified and their application in buildings is authorised.

Other options

The rain sensor VRS10 can be connected to the Smoke Ventilation System. It closes and opens the window during the rain, provided that the window is not previously opened because of the smoke sensor signal or the alarm button, which overrides the rain sensor signal. Depending on the number of windows which function as smoke ventilation flaps there are various configurations of the smoke ventilation system possible.

Applied to windows

FT, FKP, FPP, FW motor KA21/500 can be applied to the window width of 78 cm motor KA21/600 can be applied to the window width of 94 cm