oventrop Regtronic RQ Installation And Operating Instructions For The Specialised Installer page 27

Time constant ∆t circ per 10 m copper pipe depending on the fl ow rate and for different pipe diameters
120
110
100
90
80
70
60
50
40
30
20
10
0
3 4 5
10 x 1
6 7 8
Flow rate in l/min
15 x 1 22 x 1
∆T circ – circulation pipe time constant
The adjustment value ∆t circ determines the time
a heat impulse needs to pass through the entire
circulation pipe between the HW fl ow sensor and
the circulation return sensor. The controller takes
this time into account when stabilising the circula-
tion system to the required disinfection temperature
T -disinf set. The controller waits until T-disinf set is
reached at the circulation return sensor. The ∆t circ
value determines the maximum waiting time. When
the set value T-disinf set is not reached at the
circulation return sensor after the waiting time has
elapsed, the controller increases the pump speed of
the primary pump and thus the temperature at the
9 10
HW fl ow sensor.
28 x 1,5
27