BCU 480 · Edition 03.16l 31
Parameters
4.2 Flame control
4.2.1 Flame signal, pilot burner
Parameter 01
Flame signal of the pilot burner, display in μA, measur-
ing range: 0–30 μA.
4.2.2 Flame signal, main burner
Parameter 02
Flame signal of the main burner, display in μA, measur-
ing range: 0–30 μA.
4.2.3 Program status when the most recent fault
occurred
Parameter 03
This indicates the program status in which the last
burner fault occurred (e.g. the unit indicates that a
flame simulation has been detected with a blinking
01
).
In parameter 03, it is now shown which program posi-
tion the unit was in when the fault was detected (wait-
ing time
01
or standby
00
).
Result: a flame simulation was detected during the
waiting time or standby.
4.2.4 Switch-off threshold of the flame amplifier
Parameter 04, pilot burner switch-off threshold
Parameter 05, main burner switch-off threshold
The sensitivity at which the burner control unit still de-
tects a flame can be set between 1 and 20 μA.
Example: in the case of UV control with the UV sensor
UVS, the signal of the burner to be monitored is influ-
enced by other burners.
The set value can be incremented in parameter 04 so
that only the flame of the system’s “own” burner is de-
tected.
The measured flame signal of the system’s “own” burner
should be at least 3 μA (empirical value) higher than the
set switch-off threshold.
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