Fire damper BKP-EN
Technical documentation
Spring return actuators
Construction subject to change.
No return possible!
Version: 2020-09-01 | Page 26
SPRING RETURN ACTUATORS
Spring return actuators B10/B11
B10
(BFL24-T-ST SO)/
B11
(BFL230-T SO)
Figure 29: BKP-EN with spring return actuator B10/11
Connection diagram
Spring return actuators B10/B11
Figure 30: Connecting diagram B10/B11
ATTENTION!
Safety function is only guaranteed if the actuator has been
connected to the supply voltage in accordance with regula-
tions and unlocked mechanically.
Electric spring return actuator with thermoelectric release
device BAT.
Trigger temperatures: room temperature 72°C and inter-
nal duct temperature 72°C optionally 95°C (for hot air
heating).
Operating position (damper "OPEN") and tensioning of
the return spring by applying the supply voltage.
24V actuators with connectors that can be removed on
site if required.
Safety position (damper "CLOSED") through spring force
when supply voltage is interrupted or the temperature
fuses (room temperature; 72° or internal duct tempera-
ture; 72 °C optionally 95 °C) respond. Reaction of the ther-
mal fuses interrupts the supply voltage permanently.
Display of the damper end positions is possible by means
of integrated micro switches via potential-free changeo-
ver contacts (S1 – S3 "CLOSED" indicates the closed posi-
tion; S4 – S6 "OPEN" indicates the opened position).
Manual actuation and fixing in any position is possible in
the de-energised state. It is unlocked manually.
On-site function control is possible by means of the con-
trol key of BAT.
Spare parts: Temperature fuse for internal duct tempera-
ture (ZBAT72 or ZBAT95).
Replacement takes place by unscrewing both screws at
the thermoelectric release device. Remove the thermoe-
lectric release device from the actuator unit. Remove the
internal duct temperature fuse from the thermoelectric
release device and replace it with a new internal duct tem-
perature fuse (ZBAT...). Screw the thermo-electrical re-
lease device back onto the actuator unit.
For any other damage etc., the entire "actuator/thermal
release device" must be replaced completely.
Attention:
24 V connection via safety transformer
B10 (BFL24-T-ST SO):
Plug-in version, among
other uses, for connection
to the communication and
power supply unit
Parallel connection of further drives
is possible. Observe performance
