Samson TROVIS 5573 - Page 140

16-58 EB 5573 EN
Appendix A (conguration instructions)
When a storage tank thermostat is used, the 'Charging temperature' parameter can be ad-
justed at the rotary switch as the absolute value instead of the 'DHW temperature' parame-
ter.
WhentheowsensorVF4isactivated,thesetpointintheheatexchangercircuitisinu-
enced by the system deviation in the storage tank charging circuit upon activation of the stor-
agetankchargingpump:ifthetemperaturemeasuredatowsensorVF4islowerthanthe
desired 'Charging temperature', the set point in the heat exchanger circuit is increased in
stepsof1°C.Whenthesetpointintheheatexchangerchargingcircuitreachesthe'Max.
charging temperature', the set point is no longer increased. An “Err 4“ error message is gen-
erated.
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 programmed 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 'DHW temperature sustaining value' parameter is used as the basis. This function does
not apply when a storage tank thermostat is used.
Time-controlled switchover of storage tank sensors
ByconguringasecondstoragetanksensorSF2,itispossibletodeterminebysettingthe
functionblockCO4->F19-1thatthestoragetanksensorSF1isusedfordaymodeinthe
DHW circuit and storage tank sensor SF2 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 dif-
ferent temperatures if the 'DHW temperature set point' and 'DHW temperature sustaining
value' differ from one another.
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 immediately switched off.
Whenthereisnoheatingoperationorwhentheowtemperaturedemandinthesystemis
lower, the corresponding valve is closed. The storage tank charging pump is switched off af-
tert='Lagtimeofstoragetankchargingpump'x'Valvetransittime'.
Note
Note