Circulation Pump Operation During Storage Tank Charging; Priority Operation; Reverse Control - Samson TROVIS 5573 Mounting And Operating Instructions

Functions of the DHW circuit
time for Stop parallel operation in case of deviation has elapsed, system deviations greater than
5 °C cause the controller to suspend parallel operation for 10 minutes and to apply priority op-
eration. Setting Stop parallel operation in case of deviation to 0 min. leads to a parallel opera-
tion once initiated remaining regardless of a deviation.
Function
Parallel pump operation
6.7

Circulation pump operation 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.
Function
Circulation pump operation
during storage tank charging
6.8

Priority operation

In many district heating systems with primary DHW heating, the allotted amount of water can-
not 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 sys-
tem when great heating loads occur; and this, until DHW demand has been concluded.
Nevertheless, heating operation is not to be interrupted simply. Only the amount of energy re-
quired for DHW heating is to be deducted. This can be achieved by using the priority functions
Reverse control and Set-back operation.

6.8.1 Reverse control

In all systems with DHW heating and at least one heating circuit with control valve, DHW heat-
ing can be given priority by applying reverse control. With the setting CO4 -> F08 - 1, the tem-
perature is monitored at sensor VFx.
In systems without the sensor VFx in the DHW circuit (e.g. Anl 4.5, Anl 11.0), the temperature
directly at the storage sensor SF1 is monitored. If system deviations still occur after the time for
66
EB 5573 EN
WE Configuration
0 CO4 -> F06 - 1
10 min Stop parallel operation in case of deviation /
40.0 °C 0 to 10 min
Flow limit temperature for parallel pump operation /
20 to 90 °C
WE Configuration
0 CO4 -> F11