Typical Tender/Specification Text
The BSB FSD-C combination Fire and Volume Control Damper
shall pass the test requirements stated in EN 1366-2.
For maintenance of the integrity of compartmentation the fire
damper shall have an E classification to EN 13501-3.
The damper shall have an ES classification complying with
EN1366-2 and EN 13501-3 and have a minimum E120 and ES120
rating.
For the protection of escape routes and areas with sleeping risk,
the FSD-C fire/smoke damper should be used. Please refer
Approved Document B (ADB).
The single blade layered design shall be held open against the
constant force of the fitted actuator that is released to spring
closed via the activation of the fitted thermal fuse rated at 72°C.
The damper actuator assembly shall be safely tested and released
closed externally to the damper without the need for specialist
tools.
The fire damper body shall be fully welded to meet the air
tightness test requirements of HVCA specification DW144 to class
A B & C to a maximum of 1000Pa and comply with EN1751.
The closed blade shall meet the air tightness test requirement of
BS EN 1751 Class 2.
The BSB FD-C combination fire and volume control damper shall
have a tested or assessed installation method that matches the
requirement of the supporting construction. DW145 Method 4
Blockwork Walls and Partition Walls refers.
Leakage Classification
Blade leakage classification is given numerically and case leakage
classification is given using capital letters.
•
Class 4, 3, 2 or 1 refers to blade leakage –
EN1751 section C.2 refers
•
Class 4 achieving the lowest leakage.
•
Class A, B or C refers to casing leakage -
EN1751 section C.3 refers
•
DW144 part 8 table 17 and figure 178 refers.
•
Class C achieving the lowest leakage at elevated pressures.
The above references are illustrated in the graphs on Pages 10, 11
and 13 of this brochure.
Thermal Fuse
The BSB PMC24-TF and PMC230-TF
actuators incorporate a thermal fuse (TF) via
a 500mm long cable factory fitted to the
damper actuator which operates at 72°C.
This is in accordance with BS 9999 and BS
5588 Part 9.
The TF is fitted with a green LED indication light which provides a quick
visual check that the actuator is receiving power and that the TF is
intact. Also included is a manual sprung test switch for periodic testing
of the damper. For safety reasons the TF is designed to operate only
once upon reaching the activation temperature. Cutting the cable to
the TF with the power on will trip an electrical fuse within the actuator,
rendering it inoperable.
FSD-C Variants
FSD-C SC
The FSD-C SC Series
damper provides control of
elevated air temperatures
where smoke may be
present.
The woven blade core
material forms an effective
seal in the closed position
where the damper is
exposed to temperatures up to 280°C continuous or 400°C for
one hour.
Where the damper is operated to the open position to allow the
free flow of air, the damper can withstand higher temperatures.
Should the damper require to be reclosed following exposure to
temperatures greater than 400°C, the effectiveness of the seal
may be reduced.
The damper’s single blade construction maximises the free area
available ensuring the lowest possible pressure drop.
FSD-C VC
The FSD-C VC option with
its purpose design blade
core provides low closed
blade leakage and volume
control of normal dry
filtered air systems.
Through the use of factory fitted on/off, modulating or spring
return actuators, the VC option provides flexibility and an
economical solution where space is at a premium allowing the
installer to choose the optimum position for the controls.
FSD-C ESC
The FSD-C ESC option
provides an extended spindle
for control by others, offering
the same performance as the
VC option.
FSD-C Series
Single Blade Combination Fire and Smoke Dampers – Introduction
3
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