Sime SOLO 20 OF Manual Del Usuario página 78

2.7.3 "SOLO 20-30 OF/30 BF - DUETTO 20-30 OF/30 BF" functional diagram
Consensus for start-up
Heater stat
Heater
Motor
Ignition transform.
Gas-oil valve
Flame
Stop light
NOTE: On "DUETTO 30 OF/BF" without stat, the heater is always fed in winter position.
2.7.4 "SOLO 40 OF/BF - DUETTO 40 OF/BF" functional diagram
Consensus for start-up
Motor
Ignition transform.
Gas-oil valve
Flame
Stop light
76
Normal
0÷150 s ~ 12 s
Normal
~ 12 s
Stopped due to failure to ignite
0÷150 s ~ 12 s ~ 5 s
Stopped due to failure to ignite
~ 12 s ~ 5 s