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Sequence diagram of sequence switch
Switching times
(Factory settings: refer to «Type summary» and «ordering»)
T
t1
TSA
TSA´
t3
t4
t5
t6
t7
t8
t9
t10
t11
t12
Maximum permissible afterburn time (from the beginning of «t6»)
12/19
Building Technologies
I
II
III
IV
V
VI
VII
VIII
IX
t7
X
t10
XI
XII
XIII
t11
LFE1...
LFE1.1...
120 s
60 s
8...63 s
4...31.5 s
0...9 s
0...4.5 s
0...6 s
0...3 s
3 s
1.5 s
11 s
5.5 s
12 s
6 s
T – (30 + t1)
T – (15 + t1)
3 s
1.5 s
t1 + 30 + t11 + t12
t1 + 15 + t11 + t12
0...9 s
4.5 s
10 s
5 s
optional
optional
optional
optional
7 s
3.5 s
t1
t12
t8
T
Running time of sequence switch
Prepurge time (adjustable)
First safety time (adjustable, setting 0 s for ignition spark
supervision)
Safety time for the pilot burner on startup with ignition spark
supervision
Preignition time (safety time for ignition spark supervision)
Interval between release of the first and second fuel valve
Interval between release of the second and third fuel valve
or load controller
Postpurge time
Delay time
Duration of startup sequence
Second safety time with interrupted pilot burners
Preset time for air pressure check
Opening time of actuator «SA»
Closing time of actuator «SA»
t5
TSA
TSA´
t4
t3
t9
t6
7461a02/0901
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
CC1N7461en
21.08.2018
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