eta 13180LP-T, Operation

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[Solar] function block ETAtouch controller
If all conditions are met and the collector is sufficiently
warm, the upper buffer area will be charged until the
target temperature [Buffer target solar] is exceeded.
Subsequently, solar charging is switched to the lower
coil in order to charge this buffer area.
If one of the described conditions is not met (for
example, if the buffer is currently being charged
by the boiler), there is no reason to feed the solar
charge to the upper buffer coil. Therefore, the solar
charge is directed into the lower coil in order to charge
this area. If all conditions are once again met, charging
is switched to the upper coil.
The only exception to this is when solar power
increases while charging the lower buffer coil.
Then, once the minimum time (factory setting 20 min.)
passes, charging will switch to the upper coil, although
the conditions are not met.
For "BufferFlex" function block:
Here too, there is a separate target temperature for
controlling the switching [Buffer target solar]. This is
visible under:
Tab. 5-2: "BufferFlex" function block
The options for stratified charging of the buffer by the
solar heating system have been simplified for the
"PufferFlex". You can find the different settings in the
"BufferFlex" text menu under parameter [Solar storage
strategy]. The settings are described below.
Explanation of [Solar storage strategy]
Various settings can be made for stratified charging of
the buffer by the solar heating system.
• [Charging by demand]:
The current demands of the consumers on the
buffer and the set minimum temperature of the
solar heating system ([Buffer top min. solar]) are
used to calculate the temperature required for
buffer charging. The solar heating system will only
begin to charge the buffer once the collector
temperature is greater than the calculated
temperature (for charging the buffer).
• [Optimise yield]:
The solar heating system will begin to charge the
buffer as soon as the collector temperature is
greater than the current buffer temperature.
• [Charging according to buffer top min. solar]:
The solar heating system only begins to charge the
buffer once the collector temperature is greater
than the set minimum temperature of the solar
heating system ([Buffer top min. solar]).
Buffer
Solar producer
Buffer target solar
Buffer
Solar producer
Solar storage strategy