Siemens LFL1.622 - Switchgear Sequence Chart

20/25
Building Technologies Division CC1N7451en
20.11.2017
Switchgear sequence
A
t11
t7
t1 t12
BC D
t6
t20
t13t10
t16
t8
Positions of lockout indicator
Control output
at terminal:
P
20
7
19
8
9
9
10
I
II
III
IV
V
VI
VII
VIII
X
XI
XII
XIII
XIV
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
7451d01/0604
12
16
11
17
18
7
XV
a
b
12
t3 t4
*t3´ *t4´
t9
TSA
*TSA´
t5
1 2
LFL
«TSA´», «t3´» and «t4´»:
These times only apply to burner controls of the 01 series (LFL1.335, LFL1.635, and
LFL1.638). They do not apply to burner controls of the 02 series since cams
X and VIII
of these types of LFL1… perform simultaneous switching actions.