36
12.8 Start aid function
menu 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
fi
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
12
12
12.7 Heat quantity
menu 7.7 / 7.7.1 - 7.7.5
A simple heat metering function for basic system control can be activated in
this menu. Additional settings regarding the glycol, the percentage of gylcol
and the
fl
ow rate of the system are required. A correction value for the heat
metering is also possible by adjusting the “Offset
∆
T”.
Since the calculation of the heat metering is based on the temperature of the
collector and storage where measuring takes place, a possible deviation from
the
fl
ow and return temperature can be compensated with this value. Example:
Displayed collector temp. 40° C, measured
fl
ow temp. 39° C, displayed storage
temp. 30° C, measured return temp. 31° C means a setting of -20% (Displayed
∆
T 10K, actual
∆
T 8K => -20% correction value)
Heat metering: Settings range: On/off /default setting: Off
AF type- Settings range: Ethylene/Propylene /default setting: Ethylene
Glycol portion -Settings range: 0-60% /default setting: 40%
Flow rate - Settings range: 10-5000 l/h /default setting: 500 l/h
Offset
Δ
T - Settings range: -50% to +50% /default settings: 0%
Caution
Keep in mind that the system is not changed, adjustments made in
this menu are only used to calculate the heat volume and should
be based on the actual system. Resulting data is only approximate
value for function control!
