Fuel Selector (X4-01 Pin 1 / X4-01 Pin 2); Fan Contactor Contact / Flue Gas Recirculation Pressure Switch (X4-01 Pin 3) - Siemens LMV50 Series Manual

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4.1.5.3

Fuel selector (X4-01 pin 1 / X4-01 pin 2)

The fuel selector is given priority. It has the positions INT, GAS and OIL and is to be
connected directly to the LMV5.
It is possible to switch between oil-fired and gas-fired operation.
When the fuel selector is set to INT, 1 of the other 2 sources can be selected (BACS or
AZL5).
4.1.5.4 Fan contactor contact / flue gas recirculation pressure switch (X4-01 pin
3)
This input is used for connecting a fan contactor contact (FCC) or a flue gas
recirculation pressure switch (FGR-PS).
The input serves for checking the position of the fan contactor.
The input is active both with oil-fired and gas-fired operation.
A signal is expected at this input after control of the fan
Parameter FGR-PS/FCC
The input is used for connecting an air pressure switch required for flue gas
recirculation (FGR)
Parameter FGR-PS/FCC (FGR-PS)
The input can be deactivated
Parameter FGR-PS/FCC (deactivated)
The input is used for the connection of an air pressure switch required for flue gas
recirculation (FGR) or of an external process air fan, but the signal delivered by the air
pressure switch is not valued during home run and in standby.
Parameter FGR-PS/FCC (deactInStby)
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CC1P7550en
22.05.2018