09/2005 - Art. Nr. 13 019 533A
6
Burner functions
Functional sequence of burner control units LAL 1...
The burner control units LAL 1... are
designed for controlling and monitoring
burners with multi-stage or modulating
control systems. For a detailed functio-
nal description of the burner control
units, including technical data and
planning information, refer to
Technical Documentation
LAL 1 L&G 7153 D
Functional diagram, 2-stage
A
=
Start command
A–B =
Interval for flame formation
B
=
Burner in operating position
B–C =
Burner operation
(heat generation)
C
=
Controlled shutdown
t1
Pre-venting time
t2
Safety time
t3
Preignition time, short
t30
Preignition time, long
t3n
Post-ignition time
t4
Interval between voltage on
terminals 18 and 19
t6
Post-venting time
t7
Interval between Start command
and voltage on terminal 7
t11
Opening time of air damper
t12
Closing time of air damper
t13
Admissible after-burning time
t16
Interval until OPEN command
for air damper
G Blower motor
R Temperature or pressure controller
Z
Ignition transformer
BV Fuel valve(s)
FS Flame signal
LR Load controller
LK Air damper
