4 213 321 V01 KDT RegelModul Solar EN.docx
75 / 95
If the volume flow sensor option (08-107) is active and the collector return sensor TKR option (30-016) is
activated, the collector return sensor TKR is used as a reference sensor instead of TxU for the yield calculation.
The measured volume flow is also included in the calculation. Thermal capacity at 50 °C: water: 4.19 kJ/kgK
12.6.3. Volume flow recording (heat quantity measurement)
The current volume flow in the solar circuit can be measured using a volume flow meter. The parameter (08-107)
activates the volume flow measurement. The pulse rate in pulses per litre is defined under (17-001).
There will be deviations depending on the type of the volume flow meter. to smooth out these deviations,
the value of the flow rate in l/min can be corrected using the offset parameter (28-020).
The volume flow is used as the basis for calculating the output of the solar circuit and the speed limit of the
solar pump.
The measured volume flow in the unit l/min is taken into account in the calculation of solar output.
The current volume flow is compared with the parameter maximum volume flow (08-037) and minimum volume
flow (08-038). The speed of the pump is limited accordingly by this.
Parameter
08-107 Volume flow measurement option
>
If this is not equal to 0, a collector return sensor must be connected.
!Can be set per collector field!
08-037 Maximum volume flow in l/min
08-038 Minimum volume flow in l/min
17-001 Pulse rate in imp/l
28-020 Offset volume flow for the collector circuit in l/h
Info output
00-061 Collector return temperature TKR, 00-062 Solar circuit flow rate VKx
Speed limit of the solar circuit pump PSx
