32
Caution
For a proper operation of the controller and analysis of the system data it
is essential for the time to be set accurately on the controller. Please
note that if the mains voltage is interrupted the clock continues to run for
24 hours and then stops and needs to be reset after that.
With some solar thermal systems, namely with evacuated tube collectors, it may occur
that measurement at the collector sensor takes too long or is not quite precise, which
is often caused by the sensor not being placed at the hottest location. When the start
aid function is activated, the following is carried out:
If the temperature at the collector sensor increases by the value specified 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 aid function is
subject to a 5-minute lockout time.
Starting aid setting range: on, off/Default setting: off
Purging time setting range: 2 - 30 s /Default setting: 5 s
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 instructi-
ons from the collector manufacturer.
Special functions
6.13. - Daylight saving time
6.14. - Sleep mode
When this function is active, the controller’s clock changes automatically to and from
DST (DST, Daylight Saving Time).
Setting range: on, off/Default setting: on
When active, the displays backlight is switched off after 2 minutes of inactivity.
6.15. - Temperature unit
This menu is used to select the temperature unit that is displayed.
Setting range: °F or °C /Default setting: °C
6.11. - Starting aid function
6.12. - Time & date
This menu is used to set the current time and date.
Caution
The entire parameterization, analyses, etc. of the controller will be lost
irrevocably. The controller must then be commissioned and set once
again.
