Samson TROVIS 5500 - Circulation Pump During Storage Tank Charging; Priority Position; Reverse Control

EB 5573-1 EN 95
Functions of the DHW circuit
speed reduction' and 'Stop speed reduction' (10V to 'Min. speed signal' corresponds with
'Start speed reduction' to 'Stop speed reduction'). Y1 is set to 0V when the storage tank
charging pump is switched off.
Functions WE Conguration
Speed reduction of charging pump based
on charging progress
0
40.0°C
50.0°C
2V
CO4>F21 - 1
Start speed reduction: 5.0 to 90.0°C
Stop speed reduction: 5.0 to 90.0°C)
Min. speed signal: 0 to 10V
7.8 Circulation pump during storage tank charging
With the setting CO4 > F11 - 1, the circulation pump (DHW) continues operation according
to the programmed time schedule even during storage tank charging. With the setting CO4
> F11 - 0, the circulation pump is switched off as soon as the storage tank charging pump is
activated. The circulation pump starts to operate again according to the time schedule when
the storage tank charging pump has been switched off again.
Functions WE Conguration
Operation of circulation pump (DHW)
during storage tank charging 0 CO4 > F11
7.9 Priority position
In many district heating systems with primary DHW heating, the allotted amount of water
cannot meet DHW heating and heating operation demands when they are required at the
same time. As a result, the capacity required for DHW heating needs to be taken from the
heating system when great heating loads occur; and this, until DHW demand has been con-
cluded. Nevertheless, heating operation is not to be interrupted simply. Only the amount of
energy required for DHW heating is to be deducted. This can be achieved by using the pri-
ority functions: reverse control and set-back operation.
7.9.1 Reverse control
In all systems with DHW heating and at least one heating circuit with a control valve, DHW
heating can be given priority by applying reverse control. With the setting CO4 > F08 - 1,
the temperature is monitored at sensor VFx.
In systems without sensorVFx in the DHW circuit (e.g. Anl 4.5, 11.0), the temperature is
monitored directly at storage tank sensor1. If system deviations still occur after the time set in
'Start' has elapsed, the set point of the heating circuit with the control valve is gradually re-