BCU 460, BCU 465 · Edition 11.19
74
Parameters
11 .4 .3 Flame simulation check in standby position
Parameter A003
This defines the instant for the flame simulation check.
t
88
02 . . .
00
t
88
00
02 . . .
01
t
W
V1
V1
Start 1
Start 1
Parameter A003 = 0: flame simulation check in standby
position. The flame simulation check is conducted pro-
vided no start-up signal (start 1) 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.
t
88
02 . . .
00
t
88
00
02 . . .
01
t
W
V1
V1
Start 1
Start 1
Parameter A003 = 1: flame simulation check on start-
up. The flame simulation check is conducted after ap-
plying the start-up signal (start 1) during the waiting
time t
W
.
What is flame simulation?
Flame simulation means that an extraneous signal is
detected as a flame signal out of sequence. If the BCU
detects such an extraneous signal during the flame
simulation check, it starts the flame simulation delay
time t
LV
for 25 s. If the extraneous signal disappears
during this time, the burner can start. Otherwise, a fault
lock-out occurs.
E 01
flashes on the display.
Flame simulation check in standby position (parameter
A003 = 0):
t
LV
00
t
E 01
88
ϑ
V1
V2
1
1
35
L
51
22
60
61
96
82
Flame simulation check on start-up (parameter A003 = 1):
t
00 01
tLV
E 01
88
ϑ
V1
V2
1
L
51
22
60
61
96
The flame simulation check of the burner is always ac-
tive until valve V1 is enabled.