eta HACK 20 kW, Service Manual

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Regularly Cleaning and maintenance
2.4 Regularly
2.4.1 Preparation
Stop heating
End the boiler's heating mode with the On/Off switch
in the boiler overview window. The boiler
performs an ember burnout and then changes to
[Switched off] mode. Press the [De-ash]
button to
make the boiler perform a final de-ashing.
2.4.2 Empty the ash box
Remove excess ash from secondary combustion
chamber
Open the combustion chamber door and use the poker
to scrape the excess ash into the combustion
chamber.
The ash in the secondary combustion chamber
may not be steeper than 45°.
To remove this ash, initiate boiler de-ashing by
pressing the [De-ash]
button.
Empty the ash box, inspect the seals
By knocking on the vertical wall of the ash box,
you can also check the ash level without opening
the box. A full ash box makes a short, dull thump.
When empty it makes a hollower sound like a drum.
Open both lateral fasteners by pressing their safety
catches in the direction of the arrow. Remove the ash
box from the boiler.
Fig. 2-1: Fastener
Remove the lid by opening the fasteners and empty
the ash box.
Fig. 2-2: Check ash
If there are large pieces of slag in the ash, the
combustion chamber and the tilting grate must be
checked and the de-ashing interval reduced, if
necessary.