Samson TROVIS 5573 - Page 137

EB 5573 EN 16-55
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.
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SF1hasreachedthetemperatureT='DHWtemperature'+'Hysteresis'.Whenthereis
noheatingoperationorwhentheowtemperaturedemandinthesystemislower,thecorre-
spondingvalveisclosed.Thestoragetankchargingpumpisswitchedoffaftert='Lagtime
of storage tank charging pump' x 'Valve transit time'.
Withthedefaultsettings,thetemperatureinthestoragetankisincreasedby5°Ctoreach
65°Cwhenthestoragetanktemperaturefallsbelow60°C.Thechargingtemperatureiscal-
culatedfromthe'DHWtemperature'(60°C)plusthe'Chargingtemperatureboost'(10°C),
whichequals70°C.Whenthestoragetankhasbeencharged,theheatingvalveisclosed
and the charging pump continues to run for the time t. Outside the times-of-use, the storage
tankisonlychargedwhenthetemperaturefallsbelow40°C('DHWtemperaturesustaining
value').Inthiscase,thetankischargedwithachargingtemperatureof50°Cuntil45°Cis
reached in the tank.
Functions Default Conguration
Storage tank sensor SF1 1 CO4->F01-1
Storage tank sensor SF2 CO4->F02(-1whenCO4->F19-1)
SLPONdependingonreturnowtem-
perature
0 CO4->F15
Time-controlled changeover of storage
tank sensors
0 CO4->F19(-1onlywhenCO4->F02-1)
Discharging protection 0 CO4’->F03-1
Note