eta PelletsCompact33-50 kW, Operation

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[Buffer] function block ETAtouch controller
5.3.4.7 Min. out. temp. Solar prio.
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.
The parameter can be found under:
or also in:
5.3.4.8 Buffer bottom max
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.
The parameter can be found under:
5.3.4.9 Solar priority
Explanation of [Begin solar prio.], [Change priority
at] and [End solar prio.]
Optional: only with solar heating systems
These parameters are used to set the time slots for the
[Solar priority] function.
The first time slot lasts from [Begin solar prio.] to
[Change priority at]. The second time slot begins with
[Change priority at] and ends with [End solar prio.].
Outside the 2 time slots, the boiler can charge the
buffer at any time.
Set the start of solar priority before the first time
window of the heating circuit and hot water tank.
Otherwise, the boiler may start beforehand, in order to
charge the heating circuit or hot water tank.
During the configured times for solar priority, it
may happen that the heating circuits or the hot
water are not supplied with sufficient heat.
The parameters for setting the 2 time windows are in:
Set the start of solar priority before the first time
window of the heating circuit and hot water tank.
Otherwise, the boiler may start beforehand, in order to
charge the heating circuit or hot water tank.
During the configured priority times, it may be the
case that the heating circuits or the hot water are
not supplied with sufficient heat.
Switch function on or off
The parameter can be found under:
5.3.4.10 Extra solar heat
Explanation of [Extra solar heat]
Optional: only with solar heating systems
This function defines whether the buffer storage tank
may convey this excess heat from the solar heating
system to other consumers, even if they do not
currently require any heat.
The following conditions must be met in order for
the excess solar heat to be passed on in this way:
• The outside temperature must have exceeded the
configurable value [from outside temp.].
• The [Buffer top] temperature in the buffer must
have exceeded the configurable value of [at buffer
top].
• The [Buffer bottom Solar] temperature in the buffer
must have exceeded the configurable value of [at
buffer bottom sol.].
Buffer
Buffer top Solar
Min. out. temp. Solar prio.
Buffer
Buffer bottom Solar
Solar priority
Min. out. temp. Solar prio.
Buffer
Buffer bottom Solar
Buffer bottom max
Buffer
Buffer bottom Solar
Solar priority
Begin solar prio.
Change priority at
End solar prio.
Buffer
Buffer bottom Solar
Solar priority
Solar priority