Operation Layout; Firing Failure; Burner Flame Goes Out During Operation - Riello RLS 70 Installation Instruction

6.3

Operation layout

See (Fig. 43).
Switching times are given in seconds, in the burner startup se-
quence.
LFL 1.335 Series 01
t1 37.5
t2 2.5
t3 5
t4 25
t5 optional
Legend for the times
t1 Pre-purge time with air damper open
t2 Safety time
t3 Pre-ignition time, short (ignition transformer on terminal 16)
t4 Interval between start of t2 and release of valve at terminal 19
t5 Interval between end of t4 and release of load controller or
valve at terminal 20
t5 Running time of air damper into OPEN position
t6 Running time of air damper into low-flame position (MIN)
t7 Permissible after-burn time
t8 Interval until OPEN command for the air damper is given
t9 Running time of pilot
Full modulation
D2273
Electrical system
t6 optional
t7 15
t8 5
t9 16
Tab. J
Fig. 43
27
D2274
6.3.1

Firing failure

If the burner does not fire, it locks out within 2.5 seconds from open-
ing the pilot valve and then within 5 seconds from opening the main
valves.
6.3.2

Burner flame goes out during operation

If the flame should accidentally go out during operation, the burner
will lock out within 1s.
High - Low
Fig. 44
6046