English
11
Generally for all programs (16, 17, 18):
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
(only for speed version ESR31-D)
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
(only for speed version ESR31-D)
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.
Program 18
(only for speed version ESR31-D)
Speed control is only active if the volume flow at sensor S3 (VFS2-40) exceeds the minimum
flow rate,
min
. Temperature sensor S2 is the VFS2-40 temperature sensor.
Sensor VFS 2-40
S2… temperature
S3… flow rate
Additional required settings:
Setting of sensor
S2
as VTS (vortex temperature sensor)
and sensor
S3
as VF2 (vortex volume flow encoder) in the menu
MEN/Sensor
Menu PAR
: min threshold of the flow
in l/h
(ex works = 5 l/h)
CW
A
