43
6 O
2
Trim
6.8.2 Calling up O
2
Trim Text Messages
Switch display to O
2
trim
6.9 Commissioning
6.9.1 Setting the Correction Range and the Correction Mode
The correction value (control signal) transmitted to the electronic fuel/air ratio control is 0
…100% with a resolution of 0.1%.
0% corresponds to maximum excess air, 100% to minimum excess air. Factory setting is a
neutral value of +60% to -40%. This means that the control range in the direction of excess
air is 60% and in the direction of air deficiency it is 40%. The main focus of this base setting
is that contamination of the burner and the boiler during the operational period would result in
an increase in the installation's flow resistance. Thus a larger control range in direction excess
air could be an advantage.
If another correction mode is selected via p 437, the base setting also changes at the same
time:
Calling up the base setting (only when burner stationary).
press key "RESET"
press key M
press key "ENTER" to call up the text messages
press key "ENTER" again back
In Correction Mode Base Settings
+50% .... -50% 50,0%
-50% .... +50% 50,0%
+60% .... -40% 60,0%
-60% .... +40% 60,0%
0% .... -100% 0,0%
-100% ..... 0% 100,0%
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