Technische Alternative ESR 31 Series

38
Heat quantity counter HQC
ON/OFF
Sensor supply line
Sensor return line
Encoder or vortex
sensor
Litres per pulse -
LPP only displayed when
sensor type S3 = VSG
(pulse encoder)
No volume flow
encoder
Fixed volume flow
Share of antifreeze
Sensor adjustment
(see description)
Reset counter
The device also has a function to count the heat quantity. It is disabled ex works. A heat
quantity counter basically requires three types of information:
supply line temperature return line temperature flow rate (volume flow)
In solar thermal systems, the correct installation of sensors (see sensor installation - col-
lector sensor on the supply line’s collecting tube, tank sensor on the outlet of the return line)
automatically leads to correct measurements of the required temperatures, though the losses
in the supply line will be included in the heat quantity. To increase accuracy, in indication of
the share of antifreeze in the heat transfer medium is necessary as the antifreeze lowers heat
conduction.