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Maintenance (expert)
Cleaning and maintenance
Mounting the cover on the top
Re-install the cover back on top of the boiler.
Fig. 2-72: Cover
2.6.13
Calibrate lambda probe
Calibrating the lambda probe
The boiler's built-in lambda probe checks the
residual oxygen content of the flue gas and uses
it to control the combustion. To ensure reliability, the
control system autonomously performs an automatic
calibration after every 500 hours of operation.
If you wish to perform an additional lambda probe cal-
ibration, the control system features the [Addl. calibra-
tion] function. This function can be selected with the
[Service] access level and can be found under:
Switch on this function and the additional calibration
will now start. If the boiler is heating, it is automatically
stopped first. De-ashing begins, then the boiler is
purged with fresh air. After this, the residual oxygen
content is measured and the lambda probe is automat-
ically calibrated. Altogether, these steps last approxi-
mately 45 minutes. When the calibration is complete,
the boiler goes back into operation and starts heating,
if necessary.
After another 100 hours of operation, the control
system automatically performs another calibra-
tion.
Inputs
Residual O2
Calibration
Addl. calibration
