50
7 O
2
Trim
7.9.5 Calling up the Set Correction Mode
Take the correction into account during later programming.
The correction actuator must be able to operate without the ETAMATIC OEM reaching the
end-stop (0 or 999 or limit stop values).
If the correction actuator cannot be driven all the way as required because a channel has
reached the range limit determined during pre-purge, the burner's output is increased or de-
creased until the actuator can be driven all the way.
7.9.6 Checking the Combustion Limit Values
It is necessary to guarantee the combustion facility's safe burning even with the maximum cor-
rection applied. The correction value can be modified as follows in order to set the correction
range and monitor the combustion boundary values:
The adjustment of the correction range is possible via parameter 517. If you adjust parameter
517 while the burner is running, adjust in small steps and pause between two steps. Otherwise
the fault 106 may occur.
Example: Ccorrection mode P 437 for O
2
trim is +60/-40
CO control is +50/-50.
Correction range P 517 is 100 (digit).
This means:
The adjusting range of the setpoint which can be modified in correc-
tion mode should be between +60 (digit) and -40 (digit).
E.g. With a current setpoint of 200 digit, the modifiable by correction
adjusting range lies between 260 digit (excess air) and 140 digit (air
deficiency).
Recommendation: You should chose the correction mode and the correction range in
that way, that the correction effect on the O
2
value is -2 to 3 vol.% O
2
.
press F1 (reset)
press enter again
press F1 "Reset"
enter password
press keys F2 and F3 to select "Set O
2
”
press key 8 to confirm
press keys 16 and 17 to select "Set O
2
”
press "Enter"
press key 5 to confirm the display shows "TK"
use keys 2 and 3 to modify the correction value within the burner running
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