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Special functions
6.6. - Heat quantity
6.6.1. - Constant ow
When the heat meter mode „Flow rate“ is selected, an approximated heat quantity is
calculated using the values the user has to enter. These are type of glycol/AntiFreeze,
glycol portion and ow rate. These values are put into correlation with the temperature
data of collector sensor and storage sensor. If necessary a correction value for ΔT can
be set: Since for the heat meter the collector and the storage temperature are used,
a difference to the ow respectively return ow temperature can be compensated by
changing Offset ΔT accordingly.
Example:
Displayed collector temp. 40°C, measured ow temperature 39°C, displayed storage
temperature 30°C, measured return temperature 31°C = results in a correction value of
-20% (displayed ΔT 10K, real ΔT 8K = -20% correction)
Caution
The heat quantity measured in the mode “Flow rate” is a calculated
approximation for function control of the system.
This determines the sensor that is used to measure the ow temperature.
This determines the sensor that is used to measure the return temperature.
Set the type of anti freeze used. If none is used, please set to 0.
The amount of anti freeze agent in the system.
Flow rate that is used to calculate the heat quantity
This determines the ow rate in litres per minute that is used for the calcualtion of the
heat quantity.
Correction value for temperature difference
Since for the heat meter the collector and the storage temperature are used, a diffe-
rence to the ow respectively return ow temperature can be compensated by chan-
ging Offset ΔT accordingly.
Example:
Displayed collector temp. 40°C, measured ow temperature 39°C, displayed storage
temperature 30°C, measured return temperature 31°C = results in a correction value of
-20% (displayed ΔT 10K, real ΔT 8K = -20% correction)
6.6.2. - Flow sensor (X)
6.6.3. - Return sensor
6.6.4. - Anti freeze type
6.6.5. - Glycole percentage
6.6.6. - Flow rate (X)
6.6.7. - Offset ∆ T
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