FSD-B-U / FSD-A-U Fire and smoke dampers.
UL Approval
Operation:
The FSD-B-U and FSD-A-U models are designed to be fail-safe, allowing the dampers to automatically
return to the desired position in the event of a fire and smoke.
The damper operates (closes) if the power supply of 24 V (optionally 230 V) to the servomotor is
interrupted, whether as a result of a system failure, a command from the control system or by the
thermoelectric fusible link when the temperature exceeds 74º C. The damper is open while power is
supplied.
The damper automatically resets (opens) when 24 V (optionally 230 V) is supplied to the servomotor. If the damper is
closed due to high temperatures, i.e. by the thermoelectric fusible link, it is manually reset by a button installed on the
damper.
Remote damper status indication (limit switch) is also available.
Installation:
The dampers are designed for the lowest possible pressure drop. The technical department deals with each order
individually and supplies the client with a blade width for the desired height and ensures that the dampers have the
greatest free area when open and, therefore, the lowest pressure drop. Blade width may therefore differ and can protrude
outside the damper frame on one or more sides, up to a maximum of 69 mm.
MÁX. 69 mm
123
FLOW RATE
EJE INTERCONEXIÓN LAMAS
MURO
CORTAFUEGO
DAMPER
ENCLOSURE
ACTUATOR
BEARING
SUPPORT
SHAFT
FRAME
BLADE
FIXING ANGLES
EXPANSION AREA (MINIMUM
6 MM, MAXIMUM CONSULT
MOUNTING INSTRUCTIONS)
RESETTABLE
THERMAL
AC
OPENING AND
CLOSING
ACTUATOR
Series FSD-FLD
5
