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General Information
FMS Operating Principle
Energy-saving mode for
The brightness of the display can be adjusted to the ambient light
running text display
conditions by means of parameters.
In addition the display can be set to automatically revert to the lowest
brightness level if not operated within a given period of time.
Separate ignition point
In the standard version the ignition point is situated outside the accessible
range in order to set a separate fuel/air ratio. By means of parameters,
however, the ignition point can be adjusted so that it lies on the compound
curve.
Integrated power control unit
An integrated power control unit is also available as an option. Where this
(option)
is used the actual temperature or the actual pressure is directly switched
instead of the load signal. The control parameters are adjusted via
parameters. It is also possible to change the setting (daytime/night time
The integral output regulator is a PID controller with special combustion
technology functions. It can be used as a fixed-value regulator or as a
weather-dependent regulator. The following signals can be set:
-
Actual value (analogue)
-
External temperature or some other analogue signal for target value shifting
(only in weather-dependent regulators)
-
Target value switching (via zero-potential contact)
Combustion enabling by the output regulator takes place internally in the FMS
Boundary values that switch the burner on and off, need to be set via parameter
regulation
-
optimises combustion systems
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-
saves fuel
-
minimises pollutants
The main purpose of O regulation is to compensate for perturbations that
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affect combustion. In addition, the O regulation system monitors the
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combustion's fuel/air ratio. A message is output at once if it strays outside
the permitted limits.
The following are the main perturbing factors that affect combustion:
Air:
Temperature
Contamination: Burner
Pressure
Boiler
Humidity
Fuel: Calorific value
Mechanical systems:
Temperature
Mechanical
Viscosity
hysteresis
Density
(free play)
Gas pressure fluctuations
The O control unit is implemented as a free-standing software module.
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The unit compares the residual oxygen content in the exhaust gas of a
combustion system measured by means of the LT1/LT2 Lambda
transmitter (actual value) with the optimum residual oxygen content (target
value). The target values are stored in the instrument in the form of an
installation-specific curve. The control unit applies a correction until the
actual value corresponds to the target. The calculated output value of the
O control module is transmitted to the compound module as a correction
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input signal.
operation) and to control the atmospheric conditions by switching in the
outside temperature.
setting. In this case, the startup signal is removed internally from the FMS via the
output regulator module.
The operator is alerted by the display (running text) that the output regulator
refuses to enable a startup.
Integrated O
