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Special functions
7.9. - Starting aid
(solar only)
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 location. When the start
help is activated the following sequence is carried out:
If the temperature at the collector sensor increases by the value specifi ed under
“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.
Start help setting range: on, off/default setting: off
Purging time setting range: 2 ... 30 sec./default setting: 5 sec.
Increase setting range: 1°C....10°C/default setting: 3°C/min.
Caution
This function should only be activated by a specialist if problems
arise with acquisition of measurement values. In particular follow
the instructions from the collector manufacturer.
When this function is active, the controller’s clock changes automatically to and from
DST (DST, Daylight Savings Time).
7.10. - Daylight saving time
