PFU 780 · Edition 02.12l 27
Parameters
4.3.1 Permanent pilot burner Parameter 16 = 1
Operating mode: Permanent pilot burner
In the “Permanent pilot burner” operating mode, the pi-
lot burner remains in operation until its start-up signal
drops.
If this parameter is activated (P16 = 1), both flames are
controlled independently in the case of pilot and main
burner monitoring.
Operating mode: Intermittent pilot burner
Start-up as in the illustration “Permanent pilot burner”
with the difference being that the start-up signal for pi-
lot and main burners is applied synchronously and that
immediately after the flame proving period t
FS1
, the
main burner is started.
t
SA1
t
Z
04 06 07 08 02 03 00
t
t
FS1
t
SA2
t
FS2
26a
16c
18e
2c–4c
18a
14a
88
10e
26e
30a
28c
2e–4e
6a–6e
V1
1
V2
2
ϑ1
ϑ2
2
1
PFU 780
A
P
L1
1
2
SPS
PLC
CPE
ϑ
VR..R
VAG
VBY
TZI
2
1
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