15
5 Internal Burner Firing Rate Controller
5
Internal Burner Firing Rate Controller
5.1
Purpose
The internal firing rate controller calculates the burner firing rate against a pre-defined setpoint
value (e.g. as a function of temperature or pressure) by comparison with the actual value. This
position will be transferred to the electronic fuel/air ratio control as a default value.
5.2
Brief Description
The integrated firing rate controller is a PID controller with special combustion engineering
functions. You can use it as a fixed value control or as a control by atmospheric condition. The
following signals can be preset:
• Actual value (temperature PT 100 max 320 °C or steam pressure)
• Outside temperature or another analog signal for setpoint shift (only on control by atmos
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pheric condition). The ETAMATIC V must be equipped with the optional hardware for con
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trol by atmospheric condition.
• Setpoint switching (via floating contact). The burner firing rate controller releases the com
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bustion internally.
Combustion is triggered internally by the power control unit.
5.3
Range Limits
You must set limit values in the parameters, switching the burner on and off. After a burner
shut-down while actual temperature has not reached the switch-on threshold yet, a display will
inform you that firing rate controller is refusing a start-up.
5.4
Moving Screen "Actual Temperature is too high"
NOTICE
The limit values should always be entered in the form of a difference from the setpoint value.
5.5
Enter Setpoint of Firing Rate Controller
Up to software version A3i1023 you can change the setpoint with parameter settings only.
From software version A3i1023 on you can change the setpoint of the firing rate controller.
This function works in case of running burner only.
- Display on firing rate rating
Press key 12 HAND to override this and start the ETAMATIC V, if the maximum tem
-
perature has not exceeded.
Press key 12 HAND again to switch back to automatic mode.
Press key 9 and 6 simultaneously → the setpoint in the display is blinking.
Summary of Contents for ETAMATIC V
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