eta SH20 User Manual

ETAtouch controller [BufferFlex] function block - log boiler
41
7.3.4 Text menu - Adjustable parameters
Adjustable parameters
For the basic function of the buffer, the respective
temperature sensors must be assigned in the
buffer settings. Some of the following parameters can
also be found in the settings of the BufferFlex [Sensor
assignments].
If a solar heating system is additionally connected to
the buffer, further parameters can be set.
If the buffer is implemented as a combination tank,
further parameters can be set.
Detailed descriptions of the parameters are provided
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]).
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 [Buffer max]
This configurable shutdown temperature sets a
threshold for how much the buffer can be charged by
the solar heating system, to prevent the buffer from
overheating. If the allocated temperature sensor
reaches the configured shutdown temperature, the
solar pump of the solar heating system is switched off.
Explanation of [Priority]
Optional: only with solar heating system and buffer
with 2 internal coils
Buffer
Solar producer
Solar storage strategy
a
a. Only visible with stratified charging of the buffer
Buffer top min. solar
a
Buffer max
Priority bottom
Priority top
a
Consumers
b
b. Only visible with a single consumer level
Extra solar heat
from outside temp.
from accumulator tank temperature
Consumer levels
c
c. Only visible with multiple consumer levels
Consumer 1 (top)
(applies also to [Consumer 2] and [Con-
sumer 3])
Excess solar heat
from outside temp.
from accumulator tank tempera-
ture
Buffer
Hot water area
Switch-on diff.
Circulation
a
a. Only visible with additional circulation pump
Circulation runtime
Circulation pause
Enable circulation

eta SH20 Specifications

General

Brand	eta
Model	SH20
Category	Boiler
Language	English