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6 Operating Control and Displays
6.1.4.7 Check Digital Inputs/Outputs
Check Digital Inputs and Outputs
NOTICE
The signals ’Fuel selection oil’ and ’Fuel selection gas’ are logical and not physical signals.
Background: Some signals have more sources than one (terminals, LSB, field buses, param-
eters).
6.1.4.8 Flue Gas Recirculation
Indication of the Recirculation Delay
This window shows the countdown for the delay time and the flue gas temperature to activate
flue gas recirculation.
Fuel selection oil
Fuel selection gas
Burner ON
Fan ON/OFF
Fault
Ignition transformer ON/
OFF
Oil pressure min. is present
Gas pressure min. is present
SIC* oil is closed
Ignition valve ON/OFF
SIC* boiler is closed
Flame signal is present
Fault release
Oil pump OFF
* SIC = safety interlock chain
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