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Legend
9 Legend
88
Display
Ready for operation
Safety interlocks
Burner start-up signal
Digital input
DI
Ignition transformer
Gas valve
Air valve
Purge
P
External air valve control
A
Flame signal
Burner operating signal
1
Operating signal, pilot burner
1
1
Operating signal, main burner
1
2
Fault signal
Reset
Input signal
Output signal
Input/Output safety circuit
PFA, BGT · Edition 03.11l
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