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Legend
11 Legend
Manual mode
Safety interlocks (limits)
Start-up signal
High temperature mode
DI
Ignition transformer
Gas valve
Air valve
Purge
P
Ext. air valve control
A
Flame signal
Operating signal
1, 2
Pilot and main burner
Fault signal
Reset
t
Closing time
S
Air pressure switch
IC 40 · Edition 07.18
71
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