Burner Operation; Burner Start Up Cycle - Riello P 140 T/G Installation, Use And Maintenance Instructions

8. BURNER OPERATION

8.1 BURNER START UP CYCLE

Thermostat
Motor
Ignition transformer
Safety valve
st
1 ßame valve
nd
2 ßame valve
rd
3 ßame valve
Lock-out signal
ALTERNATIVE START-UP CYCLES
1) If you desire the pre-ignition being present during the complete pre-purge phase (37 s): remove the bridge from
the terminals 11 - 3 and put it on the terminals 11 - 7 of the control box.
2) If you desire to reduce the pre-purge period from 37 to 20 s (with contemporaneus presence of the pre-ignition)
remove the wire from the terminal no. 7 to the no. 3 of the control box (maintaining the bridge to the terminals
11 - 3).
THREE STAGE OPERATION
rd
max
3 stage
nd
2 stage
st
1 stage
0
Normal
10 s 17 s 20 s
13
Lock-out because of no ignition
7 s 6 s 10 s 17 s 20 s 5 s