Kromschroder FCU 500 - Page 92

FCU 500, FCU 505 · Edition 02.17 92
Parameters
In the event of a fault, the actuator is moved to the posi-
tion set via cam S4 for minimum capacity via the output
at terminal 54.
Control range between the positions for minimum
and maximum capacity
0° 90°
S4
S1 S3
Burner control range
Butterfly valve setting range
Control range
Move to ignition position
Ignition pos.
Min.
pos.
Closed
pos.
Max. pos.
MIN
MIN
MIN
MAX
MAX
MAX
The control system is enabled for operation via the
controller enable output (terminal 56). During the con-
troller enable procedure, the actuator can be adjusted
infinitely between the positions for maximum and mini-
mum capacity by an external three-point step control-
ler. There is no timeout active in this case.
Control range between the positions for maximum
capacity and ignition capacity
The wiring between the FCU and the 3-point step con-
troller can be adjusted so that the control range of the
actuator is between the positions for maximum and
ignition capacity.
1 2 3 46 47 48 49 50 4 67 44 52
45 51 65 66 68
41 4216
17 18 57
13 14 15
53
54 55 56
58
62 61 5 6 7 8 11 12
FCU 500..F1
5AT
3,15AT
µC
24V
DC
88
PE
L1
N
3PS
3 2 116 67 4812 1115 13
S3 S4
S11
S10
0° 90°
M
IC 20
PE
S1S2
90°➔0° 0°➔90°
The minimum position which can be reached is the
closed position.
0° 90°
S4
S1 S3
Move to ignition position
Burner control range
CLOSED
IGNITION
Butterfly valve setting range
Control range
Ignition pos. Max. pos.
OPEN
Min.
pos.
Closed
pos.
MIN MAX
MAX
Manual mode
In Manual mode, the actuator can be moved between
the positions for maximum and minimum capacity in
3-point step operation. No timeout is active when ap-
proaching these positions. The controller enable output
(terminal 56) is not active and not checked.
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