Buderus Logano GA124 Installation And Maintenance Instructions Manual page 58

11 Boiler inspection and maintenance
START
PHASE 1
Ignition attempt
PHASE 2
Main burner
operating
END
58 Installation and maintenance instructions Logano GA124 special gas-fired boiler • Issue 04/2005
Room thermostat (control) signals heat requirement
Ignition spark generator operates
• ignition gas valve opens.
Ignition flame burns, S 8600 H
signals steady ignition flame
With steady ignition flame
• ignition spark generator stops.
• main gas solenoid valve opens.
Main burner operation
• S 8600 H monitors ignition flame.
Specified thermostat value (control) reached
Main and ignition gas valves close, gas burners go
out. Venting fan stops.
Fan starts.
Ignition burner operation
or ignition flame does not burn, S
8600 H starts ignition attempt,
switches off after 90 seconds.
We reserve the right to make any changes due to technical modifications.
Power interruption
system switches off. Does
system switch on again
when power is restored?
Ignition flame fault
Main gas valve closes,
S 8600 H starts ignition
attempt.