PFU 780 · Edition 02.12l
20
Parameters
4 .2 Flame control
4 .2 .1 Flame signal, pilot burner
Parameter 01
Flame signal of the pilot burner, display in
μ
A, measur-
ing range: 0 – 30
μ
A.
4 .2 .2 Flame signal, main burner
Parameter 02
Flame signal of the main burner, display in
μ
A, measur-
ing range: 0 – 30
μ
A.
4 .2 .3 Program status when the most recent fault occurred
Parameter 03
Program status when the most recent fault occurred
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
μ
A.
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
μ
A (empirical value) higher than the
set switch-off threshold.