Firefighter’s Override Vent Switch (CAS-R | FVOS) allows the Fire & Rescue Service (FRS) to take control of individual natural Smoke Heat Exhaust Vents (nSHEV) within a Mechanical Smoke Ventilation Systems (MSVS) to help maintain common escape routes free of smoke and heat in Firefighting Mode.
They are design to operate with the Sertus Addressable Control System (CAS-R) and give clear instruction of FIRE FIGHTER USE ONLY and OPEN, AUTO, CLOSE mode.
Operation is by lifting the polycarbonate cover and the use of the key switch to the required position.
The central AUTO mode allows the nSHEV to operate automatically during Means of Escape Mode following a fire trigger, OPEN overrides the system to open the nSHEV, and CLOSE overrides the system to close the nSHEV.
The switch may be installed on any level adjacent to the zone it commands to allow local override for the FRS. All switch commands are visible at, and can be overridden by, the Sertus Graphical User Interface (GUI)
Voltage: Max 30V DC
Output Current: Max 2A
Dimensions: 89 W x 93 H x 60 D mm
Protection Class: IP24D