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[Boiler] function block – HACK ETAtouch controller
However, if wood chips with less than 15% water
content are used, the [Yes] setting must be made
manually.
The parameter can be found under:
6.2.2.3 Boiler de-ashing interval
Explanation of [De-ash after min.] and [De-ash
after max.]
The boiler's de-ashing interval is set with the [De-ash
after min.] and [De-ash after max.] parameters. The
boiler de-ashes within the range specified by these two
parameters.
Different fuel qualities require different de-ashing
intervals. This is why the de-ashing interval
needs to be adjusted.
The parameters can be found under:
The de-ashing interval may only be modified after
consultation with a specialist or ETA customer
service.
6.2.2.4 Setting the idle time for heat
exchanger de-ashing
Explanation of [Begin idle time WT cleaning] and
[Idle time during WT cleaning]
The [Idle time during WT cleaning] parameter is used
to select the duration of the idle time for heat
exchanger de-ashing. The start time for the idle time is
set with the [Begin idle time WT cleaning] parameter.
The idle time should be kept as short as possible.
The parameters can be found under:
6.2.2.5 Empty ash box after
Explanation of [Empty ash box after]
This parameter is used to set the amount of fuel to be
consumed before a reminder to empty the ash box is
displayed on the screen.
If the value is set to 0 kg, this reminder will not
appear.
The parameter can be found under:
6.2.2.6 Increase O2 target value
Explanation of [Increase O2 target value]
The residual oxygen content of the flue gas increases
as a result. This is required when using an extremely
dry fuel and slag forms in the boiler. The set point is
increased based on the water content of the fuel. The
following guideline values apply:
If a fuel with water content greater than 25% is
used, this parameter must be reset to 0%.
The parameter can be found under:
Boiler
Settings
Flue gas recirculation
Boiler
Ash removal
De-ash after min.
De-ash after max.
Boiler
Ash removal
Begin idle time WT cleaning
Idle time during WT cleaning
Boiler
Ash removal
Empty ash box after
Water content of wood chips Increase by
< 15% 1.5 - 2.0%
15 - 25% 0.5 - 1.0%
> 25% no increase
Boiler
Residual O2
Increase O2 target value
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