IFD 258 · Edition 10.09
34
12 Glossary
12 .1 Waiting time
t
W
tW
t
1
3
10
11
5
13–14
8–9
L1
tZ
tSA
ϑ
01 02
88
02
Once the start-up signal
J
has been applied, the waiting time
t
W
starts to elapse. During this time, a self-test is conducted
to detect errors in internal and external circuit components. If
no malfunction is detected, the burner will start up.
12 .2 Safety time on start-up t
SA
tW
t
1
3
10
11
5
8-9
13-14
ϑ
L1
tZ
tSA
88
04
02
01
This refers to the period of time between switching on and
switching off of the gas valve V1, when no flame signal is
detected. The safety time on start-up t
SA
(3, 5 or 10 s) is the
minimum operating time of the burner and automatic burner
control unit.
12 .3 Ignition time t
Z
If no malfunction is detected during the waiting time t
W
, the
ignition time t
Z
then starts to elapse. Voltage is supplied to
the gas valve V1 and the ignition transformer and the burner
is ignited. The duration of the ignition time is either 2, 3 or
6 seconds, see [Technical data – p. 31].
tW
t
1
3
10
11
5
8-9
13-14
ϑ
L1
tZ
tSA
88
04
02
01
12 .4 Flame simulation/Flame simulation delay
time t
LV
t
1
3
10
11
5
L1
tW
tLV
8–9
13–14
ϑ
01
01
Flame simulation is an incorrect flame signal. If flame simu-
lation is detected during start-up, the flame simulation delay
time t
LV
(max. 25 s) starts to elapse. If the flame simulation is
discontinued during the flame simulation delay time t
LV
, start-
up can be initiated or operation continued. Otherwise, a fault
lock-out occurs.
