Samson TROVIS 5573 Mounting And Operating Instructions page 63

Note: The set point in the heat exchanger circuit which is valid at the end of the charging cycle
will be used again at the beginning of the next cycle.
If times-of-use have been set for DHW heating, the DHW temperature set point adjusted at the
rotary switch is applied during these times-of-use. Outside the times-of-use, the Sustained DHW
temperature is used. This does not apply when a storage tank thermostat is used.
Time-controlled switchover of storage tank sensors
By configuring a second storage tank sensor SF2 over the function block CO4 -> F19 -1, it is
possible to determine that the storage tank sensor SF1 is used for day mode in the DHW circuit
and that the storage tank sensor SF2 is used for night mode. As a result, different storage tank
volumes can be kept at a constant temperature according to a time schedule, and also at differ-
ent temperatures if the DHW set point and Sustained DHW temperature differ from one an-
other.
Stop storage tank charging
The controller stops charging the storage tank when the water temperature measured at sen-
sor SF2 has reached the temperature T = DHW temperature + hysteresis . To do so, the heat
exchanger charging pump is switched off first.
When there is no heating operation or when the flow temperature demand in the system is
lower, the corresponding valve is closed. The storage tank charging pump is switched off after
t = Lag time of storage tank charging pump x valve transit time .
Functions
Storage tank sensor SF1
Storage tank sensor SF2
Flow sensor VF4
Time-controlled switchover of storage tank
sensors
Parameters
DHW temperature set point or charging
temperature set point with CO4 -> F01 - 0
Sustained DHW temperature
Parameters
Min. DHW temperature*
Max. DHW temperature*
WE Configuration
1 CO4 -> F01 - 1
1 CO4 -> F02 - 1
0 CO4 -> F05
0 CO4 -> F19
WE Switch position / Range of values
55.0 °C / Min. to max. DHW temperature
40.0 °C / Min. to max. DHW temperature
WE Parameter level / Range of values
40.0 °C PA4 / 5.0 to 90.0 °C
60.0 °C PA4 / 5.0 to 90.0 °C
Functions of the DHW circuit
EB 5573 EN
63