PFU 780 · Edition 02.12l
29
Parameters
4 .4 Behaviour in start-up position/standby
4 .4 .1 Flame simulation check in start-up position/
standby
Parameter 15
This defines the instant for the flame simulation check.
t
LV
00
t
01
26a
16c
18e
2c–4c
88
10e
26e
30a
28c
2e–4e
V1
V2
ϑ
1
1
If the PFU notices an extraneous signal during the
flame simulation check, it starts the flame simulation
delay time t
LV
(25 s). If the extraneous signal is discon-
tinued during this period, the burner can start up. Oth-
erwise, a fault lock-out occurs.
1
blinks on the display
if an extraneous signal is detected by the pilot burner
and
5
blinks if an extraneous signal is detected by the
main burner.
Parameter 15 = 0: The flame simulation check is con-
ducted after applying the start-up signal (
ϑ
) during the
waiting time t
W
.
Parameter 15 = 1: The flame simulation check is con-
ducted provided no start-up signal (
ϑ
) is applied (during
the so-called start-up position/standby). This allows fast
start-up of the burner since there is no waiting time t
W
.
The burner must have been switched off for at least 4 s
before start-up in order for the flame simulation check
to be conducted correctly.
Flame simulation check depending on parameter 16
(Pilot burner operating mode):
Parameter 15 = 1, Parameter 16 = 1
t
ϑ
1
ϑ
2
88
00 02
06
V1
V2
Parameter 15 = 0, Parameter 16 = 1
t
ϑ
1
ϑ
2
88
00 01
05
V1
V2
02
06
t
W1
t
W2
Parameter 15 = 1, Parameter 16 = 0
t
ϑ
1
ϑ
2
88
00 02
06
V1
V2
Parameter 15 = 0, Parameter 16 = 0
t
W1
t
W2
t
ϑ
1
ϑ
2
88
00 01
05
V1
V2
02
06