BCU 580 · Edition 11.15
69
10 .4 .2 Minimum operating time t
B
Parameter 61
A minimum operating time (0 to 250 s) may be defined to
ensure that the heating equipment operates stably.
If the minimum operating time is active, burner operation
will be maintained until the set time has elapsed even if the
start-up signal fails.
The minimum operating time starts as soon as the program
step for operation/controller enable (display
08
) has been
reached.
If the start-up signal drops out before the start of operation/
controller enable, e.g. during pre-purge, the burner control
unit reverts directly to the start-up position (standby) and the
burner is not ignited.
The minimum operating time can be cancelled by switching
off the BCU or if a safety shut-down occurs.
10 .4 .3 Pilot burner
Parameter 79
t
SA1
04
06
07
08
02
03
00
t
t
FS1
t
SA2
t
FS2
13
V1
14
V2
15
V3
57
V4
ϑ
1
ϑ
2
4
88
1
9
P79 = 1
If a burner with a pilot burner is used, this parameter can be
used to define whether the pilot burner is shut down 1 second
before the end of the second safety time t
SA2
or operates
continuously.
Parameter 79 = 0: with shut-down.
Parameter 79 = 1: in continuous operation.
Parameters > Behaviour during operation
