Siemens LMV5 Series Basic Documentation page 62

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HVAC Products
If, due to external effects, an actuator moves from its required position by more than
± 0.3° (neutral band) for more than 8 seconds, the supply of fuel will be shut down.
Pos. [°]
2
0,3
Required
position
-0,3
-2
0
Successful correction < 2°
The required position is considered to be reached when it is within ± 0.3°.
When reaching a new position within ± 0.3°, the fuel / air ratio control system makes a
fine adjustment on the actuators.
Readjustments of the position are made only if the current position deviates from the
required position by more than 0.3°, followed by another fine adjustment.
If, during the load change, an actuator is mechanically blocked, the supply of fuel will
be shut down within 3 or 8 seconds.
Pos. [°]
0,3
Required
position
-0,3
-2
Actual
position
7550d18E/0502
Locking on change of load (approach < 2° > 0.3°)
Basic Documentation LMV51...
5 Fuel / air ratio control (FARC)
Pos. [°]
Required
position
t
< 5 s
< 5 s
2
0,3
-0,3
-2
0 < 5 s
Fault < 2° (Stall point at constant output)
Alarm
Alarm
t
t
CC1P7550en
01.10.2003