Siemens Lal Control Sequence Of Operations - Riello Burners RL 70/2 Installation, Use And Maintenance Instructions

Siemens LAL control
(A)
SEQUENCE OF OPERATION
Switching times are given in seconds, in the burner
startup sequence.
LAL 2.25
t1
t2
t3
t4
Legend for the times
t1 Pre-purge time with air damper open.
t2 Safety time.
t3 Pre-ignition
terminal "16").
t4 Interval between voltage at terminals "18" and "20"
t5 Air damper running time to OPEN position.
t6 Air damper running time to low-flame position
(MIN).
t7 Permissible after-burn time.
t8 Interval to the OPEN command for the air damper.
D2870
17
18 t5 optional
4 t6 optional
2 t7 12
12 t8 4
time, short ("Z" connected to