Siemens LFL1.148

8/11
Building Technologies Division CC1N7454en
20.11.2017
Control program
In the event of fault and lockout indication:
◄
No start
For example: Start control loop interrupted via actuator (SA)

Lockout due to a fault in the flame supervision circuit
▼
Abortion of startup sequence because the auxiliary switch in actuator (SA) has
cut the start control loop
1
Lockout, because no flame signal was present on completion of the ignition
safety time (TSA)
2
Lockout because no flame signal was present on completion of the second
safety time
▌
Lockout because the flame signal was lost during burner operation
◄
Lockout on completion of the control program, due to extraneous light or a faulty
flame signal
For example: Flame not extinguished
After the reset, the burner control’s switching mechanism first returns to the start position
and then initiates a burner restart.
Connection diagram
12 321 4125146 8
(7)
16 18
19 11
15
22
23
24
H
L
N
AL
EK2
W
R
GP
M1
Z
BV1
BV2
ION1
ION2
7454a04/0204
LFL1.148
SB
Si
Connection examples
5
4121520
11
68
W
R
LP
7454a02/1195
2-stage forced draft gas burner without
load controller (LR) and without actuator
(SA)
W
R
5 4 12 8 6 14 15 20 11
7454a03/1195
Atmospheric gas burner without fan
assistance, load controller (LR) and
actuator (SA)