Sorel TDC 4 - Heat Metering

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12.8 Starting aid menus 7.8 / 7.8.1 - 7.8.3
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 speci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.
Special functions menu 7
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12.7 Heat quantity menus 7.7 / 7.7.1 - 7.7.5
In this menu the type and percentage of the glycol and the type and
placement of the Vortex ow sensor have to be set.
AF type menu 7.7.1
Adjust the type of glycol/Anti-freeze that has been used in the system.
Settings range: Ethylene/Propylene /default setting: Ethylene
Glycol portion menu 7.7.2
Adjust the percentage of glycol that has been used in the system.
Settings range: 0-60% /default setting: 40%
VFS type menu 7.7.3
Set the type of Vortex ow sensor.
Settings range: 20, 40, 100 l/min /default setting: 40 l/min
VFS location menu 7.7.4
The VFS location setting denes the position of the two sensors used for
heat metering. When VFS location is set to “ow”, it is assumed that sensor
4 is mounted in the return and vice versa.
Settings range: return/flow /default setting: return
To prevent damage to the Vortex Flow sensor, it is highly recom-
mended to install it in the return; if however the VFS is installed in
the ow make sure that the max. temperatures are not exceeded!
(0°C to 100°C long-term and -25°C to 120°C short-term)
Caution