3.3.2.2
Flow rate sensor
14) measures the flow rate, ensuring a con-
stant flow rate can be set for the tap, regardless of the pressure.
The flow rate sensor is already connected and set ex-works.
3.3.2.3
Secondary circuit fill and drain cocks
The fill and drain cocks (Fig.
15) are used for filling and draining the
corresponding pipe sections.
3.3.3
Heat exchanger
Heat is exchanged between the primary and secondary circuits using
16). A copper brazed heat exchanger is used
in the standard version. This can be replaced with a stainless steel
brazed heat exchanger if the water quality requires. Depending on the
design, the primary temperature must be at least 3
°C higher than the
domestic hot water temperature.
For information about the heat exchanger that is
suitable, see the data sheet “Drinking water thresh-
olds and material used for the plate heat exchanger”
in the Download Center (www.taconova.com).
Fig.
14:
Flow rate sensor
Fig.
15:
Fill and drain cocks
Fig.
16:
Heat exchanger
TACOTHERM FRESH PETA 2 / PETA 2 X
Functional description
V02.2020 11/2020
Item no. 215747
EA no. 1329
Operating instructions
27
