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6.5.8. - Solar
This function adds a solar circuit which is controlled by the collector and storage temperature.
6.5.8.1. - Solar
6.5.8.2. - Tmin collector
6.5.8.3. - ∆T Solar
6.5.8.4. - Tmax storage
6.5.8.5. - Start aid function
Switch solar on or o󰀨.
Release temperature collector sensor:
If this value is exceeded at the given sensor and also the other conditions are met, the
controller activates the corresponding pump.
Switch-on / Switch-o󰀨 temperature di󰀨erence for collector sensor:
If the temperature di󰀨erence ΔT Solar is exceeded between the reference sensors and if
also the other conditions are met, the controller activates the pump on the corresponding
relay. If the temperature di󰀨erence falls to ΔT o󰀨, the pump is switched o󰀨 again.
If the (lower) storage temperature set here is exceed, the controller switches the pump o󰀨.
With some solar systems, especially with vacuum tube collectors, it may occur that
the measurement value acquisition at the collector sensor occurs too slowly or too
inaccurately because the sensor is often not at the hottest position. When the start
help is activated the following sequence is carried out:
If the temperature at the collector sensor increases by the value specied un-
der “Increase” within one minute, then the solar pump is switched on for the set
Purging time” so that the medium to be measured can be moved to the collector
sensor. If this still does not result in a normal switch-on condition, then the start
help function is subject to a 5-minute lockout time.
This function should only be activated by a specialist if problems arise
with acquisition of measurement values. In particular follow the instruc-
tions of the collector manufacturer.
Attention
Special functions
30


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