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[Buffer] function block Configuration parameter
6.2.2 Buffer with solar heating system
Settings for buffer with solar heating system
In addition to the basic settings, further
parameters must be set for controlling the solar
heating system.
Detailed descriptions of the parameters are provided
below.
Explanation of the [Solar heat diss.] function
Optional: only for several buffer storage tanks and
solar heating system
This function defines whether the selected buffer may
take up excess solar heat from a buffer charged by the
solar heating system.
If you set the function with the [Activate?] parameter
set to [Yes], this buffer takes up the solar excess. This
buffer is then charged up to the configured maximum
temperature [...until buffer max].
Explanation of [Buffer top min. solar]
Optional: only for solar heating systems with stratified
charging
With stratified charging by the solar heating system,
this sets a minimum temperature for the top section of
the buffer. This way, solar charging only takes place in
the top section once the solar panel is at least 7 °C
warmer than [Buffer top min. solar].
However, this minimum temperature only applies
if the conditions for stratified charging are
satisfied. If they are not, solar charging is switched to
the bottom section of the buffer, to make use of the
solar energy.
Explanation of [Min. out. temp. Solar prio.]
This parameter sets the minimum value for the outside
temperature, so that one of the conditions for solar
priority and stratified charging of the buffer storage
tank is satisfied.
Explanation of [Priority]
Optional: only with solar heating system and buffer
with 2 internal coils
This parameter sets the priority of the top and bottom
sections of the buffer for solar charging. A high priority
means that this section will be charged by the solar
heating system first. A low priority means that it will be
charged last.
Explanation of [Buffer bottom max]
Optional: only with solar heating systems
This switch-off temperature can only be set when the
solar heating system is charging the buffer. This con-
figurable temperature sets a threshold for how much
the buffer can be charged by the solar heating system,
in order to prevent the buffer from overheating. If the
[Buffer bottom Solar] temperature sensor reaches the
configured [Buffer bottom max] temperature, the solar
pump of the solar heating system is switched off.
Buffer
Solar heat diss.
Activate?
...until buffer max
Buffer top Solar
Buffer top min. solar
Min. out. temp. Solar prio.
Priority
Buffer bottom Solar
Buffer bottom max
Solar priority
Solar priority
Begin solar prio.
Change priority at
End solar prio.
Min. out. temp. Solar prio.
Extra solar heat
from outside temp.
at buffer top
at buffer bottom sol.
Priority
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