Function; 2-Stage Direct Spark Flame Burner; Modulating Direct Spark Flame Burner; 2-Stage Interrupted Pilot Burner - Siemens LFL1.133 Manual

Function

2-stage direct spark flame burner

A
R
T P
t7 t1
M1
M
~
M2
Z
BV1
R
LR
100%
M
min.
0...
LK
BV2
t11
FS

Modulating direct spark flame burner

A
T
R
P
t7
t1
M1
M
~
M2
Z
BV1
R
LR
t11
100%
M
min.
LK
0...
RV
FS
7451a07/0600

2-stage interrupted pilot burner

A
T
R
P
t7
t1
M1
M
~
M2
Z
ZBV
BV1
LR
R
100%
M
min.
LK
0...
BV2
t11
FS
12/25
Building Technologies Division
B
t3
TSA
t4 t5
t12
7451a06/0600
B
t3
TSA
t4
t5
t12
B
t3´
TSA´
t9
t4´
t5
t12
7451a08/0202
Legend
C D
BV... Fuel valve
FS Flame signal amplifier
t6
LK Air damper
LR Load controller
M... Fan or burner motor
R Control thermostat or pressurestat
RV Modulating fuel valve
Z Ignition transformer
ZBV Pilot gas valve
A Start command by «R»
B Operating position of burner
B-C Burner operation
t13
C Controlled shutdown
C-D Sequence switch travels to start position
«A», postpurging
D-A End of control sequence
t1 Prepurge time with air damper fully open
D
C
t3/t3´ Preignition time
t4/t4´ Interval «BV1-BV2» or «BV1-LR»
t6
t5 Interval between voltage at terminal
19 and terminal 20
t6 Postpurge time
t7 Interval between start command and
voltage at terminal 7
t9 2nd safety time with burners equipped
with a pilot burner
t11 Air damper's running time to the fully
OPEN position
t12 Air damper's running time to the low-fire
position
t13 Permissible afterburn time
t13
TSA/
TSA´ Ignition safety time
C D
t6
t13
CC1N7451en
20.11.2017