11
Generally for all programs (16, 17):
No thermostat function or differential switching function is activated. Calling one of these
two programs the measuring speed of the input S2 is automatically increased from AV 1.0 to
AV 0.4 (see in the menu MEN under SENSOR) and the speed control is activated as an
alternative parameter list with the following factory settings(see in the menu MEN under
PSC):
Abs. value control AC….. I 2 Desired value DVA….. 48 °C
Differential control DC.. N12 Desired value DVD….. 7.0 K
Event control EC…...... ---
Proportional part PRO…. 3 Integral part INT………… 1 Differential part DIF…….. 4
Minimum speed MIN….... 0 Maximum speed MAX…30 Delay time ALV ………… 0
In addition, the set values for the desired hot water temperature (DVA) and the mixing dif-
ference (DVD) is put down in the parameter menu to provide the user with quick access.
For more detailed data related to speed process and stability see: Pump speed control
PSC.
Program 16
By using the speed control the heat exchange outlet can be kept permanently at a con-
stant temperature via the ultrafast sensor S2 (non-standard accessory). Low stand-by loss-
es may occur. A volume flow switch S3 is not necessary.
Program 17
The speed control is only activated, if the volume flow switch S3 (non-standard accessory)
indicates a flow. Very few stand-by losses may occur. When starting, the system is a little
lazier and a volume flow switch is necessary.
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