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6 Commissioning
6.1.10 Minimum Running Time of the Fuel/Air Ratio Control
Select parameter no. 729
6.1.11 Post-purge Time
Select parameter 758
Nr. FMS ETA
/FA1
Short Text Description Min Max Default
729 1 2 stopVERB Minimum running time of fuel/air ratio control 10 999 10
Minimum running time of the fuel/air ratio control (in
seconds)
Set the minimum running time of the fuel/air ratio control
in seconds. This parameter slows down the ramp-up
time or ramp-down time of the burner from base firing
rate to high firing rate.
Nr. FMS ETA
/FA1
Short Text Description Min Max Default
758 1 1 ZEIT NA Post-purge time 0 1000 0
Post-purge time (in seconds)
0 = no post-purge
1000 = continuous purge (from 5.0 on)
Set the duration, how long the VMS/FMS/ETAMATIC
purges after a switch OFF. The air flaps were open for
this purpose. A fan output runs to 20mA. The FMS/ETA-
MATIC holds the release signal of the fan.
No post purge occurs if the parameter content is 0 and
in the case of a fault shutdown.
The actuators are not monitored in post purge mode!
The actuators only open when the flame is extin-
guished. The time begins to run immediately with clos-
ing of the magnetic valves. It may be necessary to add
this post burn time to the required post purge time
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