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Parameters
10 .6 .2 Running time selection
Parameter 41
Parameter 41 = 0: Off; checking the positions for mini-
mum/maximum capacity. A signal that the positions for
minimum and maximum capacity have been reached
is returned and monitored with a timeout time of max.
255 s. When the position has been reached, the BCU
will initiate the next program step.
Parameter 41 = 1: On; for approaching the positions for
minimum/maximum capacity. The Running time set
using parameter 42 is activated for approaching these
positions. After this time has elapsed, the BCU will initi-
ate the next program step.
Parameter 41 = 2: On; for approaching the position for
maximum capacity. The Running time set using pa-
rameter 42 is activated for approaching the position
for maximum capacity. After this time has elapsed, the
BCU will initiate the next program step. Approaching
the position for minimum capacity is signalled and
monitored.
Parameter 41 = 3: On; for approaching the position for
minimum capacity. No signal is returned that the posi-
tion for minimum capacity has been reached. The Run-
ning time set using parameter 42 is activated for ap-
proaching the position for minimum capacity. After this
time has elapsed, the BCU will initiate the next program
step. Approaching the position for maximum capacity is
signalled and monitored.
BCU 580 · Edition 11.15l
10 .6 .3 Running time
Parameter 42
This parameter can be used to adjust the behaviour of
slow opening and closing air valves. The running time
starts when the air actuator is switched off. A restart
of the burner after a controlled shut-down, a start-up
attempt, restart, cooling or purging is delayed until
the end of the running time. After the running time has
elapsed, the burner is started if the start-up signal (ϑ) is
applied.
The time should be adjusted such that the system can
be set to ignition position, i.e. that the air actuator is
closed before a start-up is initiated.
84
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