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Building Technologies Basic Documentation LMV5... CC1P7550en
6 Fuel-air ratio control (FARC) 22.05.2018
6.6.3 Masking out a load range
Here, it is possible to set a load range that is not constantly approached.
Example: LoadMaskLowLImit 45%
LoadMaskHighLimit 53%
The system travels to a load of 45% from below and waits there until the preset load of
53% is reached or exceeded. Then, using the operating ramp, it travels to 53% and
beyond. In case the load changes from a higher to a lower level, the system waits at
53%. When the preset load reaches 45% or drops below that level, the hidden range is
overridden.
Parameter LoadMaskLowLImit
LoadMaskHighLimit
6.6.4 Traveling times
The traveling speeds of the actuators for the different burner states can be adjusted.
The time to be parameterized is the period of time the actuator requires to cover an
angular rotation of 90°.
Traveling speed in the phases with no flame (e.g. driving to prepurge):
Parameter TmeNoFlame
Traveling speed in the operating position in modulating operation:
Parameter OperatRampMod
Traveling speed in the operating position in multistage operation:
Parameter OperatRampStage
Β
Note!
When parameterizing the speeds, the running times of the connected actuators must be
taken into consideration.
6.6.5 Shutdown behavior
The positions the actuators assume in the event of lockout can be adjusted. To
facilitate fault diagnostics, the actuators can be stopped at their last position or can be
driven to their home or postpurge position.
Parameter ShutdownBehav (Unchanged / PostpurgeP / HomePos)
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