© Solarbayer GmbH [210205]
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11.4
Residual heat utilisation
When the boiler has burnt down completely and there is only coal left in the combustion chamber, the BioX
wood log boiler automatically switches to boiler status 1 (system off). Now the function of residual heat
utilisation begins, which absorbs the energy still contained in the charcoal and transports it to the storage tank.
If the boiler temperature drops below the actual value of the upper buffer tank sensor during residual heat
utilization, the system switches to overrun and the tank is no longer loaded. It is possible, however, that the
temperature will rise slightly over time and thus switch back to residual heat utilisation. The minimum running
time of the circulation pump at the start of residual heat utilisation and in the run-on phase is 15 minutes.
Burn-up
Rsidual heat utilisation
Follow-up
OFF
Boiler temperature:
< 60 °C
Hydraulics:
kleiner Kreislauf
Buffer tank bottom:
>≤ Boiler IST-Temp
Boiler status:
OFF
Pumpenstatus:
OFF
Mixer status:
CLOSE
SLS
SLS
SLS
SLS
Bio
X
Bio
X
Bio
X
Bio
X
1
1
Boiler temperature:
≥ 60 °C
Hydraulics:
Storage loading
Buffer tank bottom:
≤ Boiler IST-Temp.
Boiler status:
ON
Pump status:
ON
Mixer status:
will be regulated
Boiler temperature:
≥ 60 °C
Hydraulics:
Storage loading
Buffer tank bottom:
≤ Boiler IST-Temp.
Boiler status:
OFF
Pump status:
ON
Mixer status:
OPEN
Boiler temperature:
< 60 °C
Hydraulics:
kleiner Kreislauf
Buffer tank bottom:
≤ Boiler IST-Temp
Boiler status:
OFF
Pump status:
ON
Mixer status:
CLOSE
1
1
4
SLS
SLS
SLS
Boiler status
