Sequence Of Operation - Riello RL 28/M Electrical Installation, Use And Maintenance Instructions

(A)
(B)
Full Modulation
Low-High

SEQUENCE OF OPERATION

Switching times are given in seconds, in the burner
start-up sequence.
LAL 2.25
t1
t2
t3
t4
Key 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
D2882
D2883
11
18 t5 optional
4 t6 optional
2 t7 12
12 t8 4
time, short ("Z" connected to