eta PelletsCompact 20-32 kW, Operation

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[Buffer] function block ETAtouch controller
5.3 [Buffer] function block
Buffer storage tank overview screen
1 Operating condition and information.
A description of the operating conditions can be
found in the integrated Help menu by pressing the
button.
2 Producer for the buffer.
Currently, the buffer is charged by the burner at a
flow temperature of 72 °C.
3 Temperatures of the buffer for individual areas
(top, middle and bottom)
4 Buffer consumers.
Currently, the consumers are charged with a flow
temperature of 64 °C.
5 [Settings] button.
In this menu, the charge times are set.
Mode of operation
In the settings menu ( button), the time window for
buffer charging can be set, and therefore the charge
times (see chapter
5.3.1 "Setting the buffer charging
times" ). The buffer only requests heat from the boiler
during charge times. Within the charge times, it will
continue to be loaded by the boiler until the required
temperature [Buffer target] has been exceeded in the
upper part of the buffer and the adjustable shutdown
temperature [Buffer bottom off] is reached in the lower
part. The operating mode then changes to [Charged].
If (within the loading times) there is no heat demand
from the consumer, the buffer is charged only to the
adjustable minimum temperature [Buffer top min.]. The
consumers connected to the buffer (for example,
heating circuit or hot water tank) can also request heat
from the buffer outside the charging times. The
charging times of the consumers are independent of
the charging times of the buffer.
Buffer charging times that are too brief can cause
the temperatures in the buffer to fall too far and
prevent individual consumers from being supplied with
heat. For this reason, it is advisable to set generous
charging times.
A solar heating system connected to the buffer can
charge it at any time, regardless of the set buffer
charging times.
When the buffer is the only heat producer in the
heating system, the buffer charging times also
indirectly determine the operating hours of the boiler.
Because it can only switch to heating mode within the
buffer charging periods.