5
TPM 092/13
Fig. 8
Actuating mechanism BELIMO BLF 24-T(-ST)
Fig. 9
Actuating mechanism BELIMO BLF 230-T
the back spring displaces the damper blade into the breakdown position "CLOSED". The time of
displacing the blade from the position "OPEN" to the position "CLOSED" takes maximum 16 s. In
case that the power supply is restored again (the blade can be in any position), the actuating
mechanism starts to re-displace the damper blade into the position "OPEN".
A thermoelectrical starting mechanism BAE 72B-S, which contains three thermal fuses Tf1 and
Tf2/Tf3, is a part of the actuating mechanism. These fuses are activated when temperature
+72 °C has been exceeded (the fuse Tf1 when the temperature around the damper and the fuses
Tf2/Tf3 when the temperature inside the air-conditioning piping has been exceeded). After the
thermal fuse Tf1 or Tf2/Tf3 has been activated, the power supply is permanently and irreversibly
cut off and the actuating mechanism, by means of the pre-stretched spring, displaces the damper
blade into the breakdown position "CLOSED".
Signalling of blade positions "OPEN" and "CLOSED" is ensured by two firmly set integrated limit
switches.
AC 24 V
~
1
2
+
-
DC 24 V
S2
S1
S3
S5
S4
S6
M
BLF24-T, BLF24-T-ST
an insulation transformer.
Parrallel connection of other driver is possible.
BLF24-ST-T: Design with connector plugs for communication
to network and communication device BKN230-24
Connection through
Pay attention to the power input data.
<5°
<80°
BAE72B-S
Tf1
Tf2
Tf3
LED
BLF230-T
M
AC230 V
2
1
N L1
S3
S2
S1
S6
S5
S4
For separation from the mains, a device that
insulates polar conductors must be at disposal
(Minimum distance between contacts - 3 mm).
<5°
<80°
BAE72B-S
Tf1
Tf2
Tf3
LED
Parrallel connection of other driver is possible.
Pay attention to the power input data.
