Fig. 9. Macro Icon with Inputs and Outputs
Table 18. Inputs
Inputs |
Functional Description |
Connection Signal Name |
UpperTemp |
buffer upper water temperature |
|
LowerTemp |
buffer lower water temperature |
|
DHW_TempSp |
domestic hot water setpoint |
|
SysSupplyTemp |
system supply temperature |
|
RenEnergCharge |
the DHW is charged with renewable energies e.g. solar panel |
|
LegionellaEnable |
enables the legionella function |
|
CircPumpDemand |
start DHW control and circulation pump |
|
MaxThermostat |
maximum temperature |
|
DayExtension |
extended operation |
|
HolidaySwitch |
holiday switch; 0 = auto, 1 = holiday |
|
OverheatProt |
heat generator overheat protection |
XXX |
Reset |
reset alarms |
XXX |
Table 19. Outputs
Outputs |
Functional Description |
Connection Signal Name |
ChargPumpCmd |
charging pump command |
|
ValveControl |
DHW valve control output |
|
CircPumpCmd |
circulation pump command |
XXX |
CalcDHWTempSp |
calculated domestic hot water setpoint |
|
CalcHtgDemand |
calculated heating demand |
|
LegionellaActive |
legionella function is active |
|
DHWS_Priority |
DHWS priority |
|
DHWS_SST_Alm |
supply temperature failed alarm |
|
DHWS_Leg_Alm |
legionella protection failed alarm |
|
OperationMode |
contains diagnostic information |
Table 20. Operation Modes
DISP-02 OperationMode |
Operation Mode |
Comments |
1 |
unoccupied period |
“DHW_TempSp” < SYS-01 |
2 |
occupied period - normal operation |
“DHW_TempSp” >= SYS-01 |
3 |
||
4 |
||
5 |
||
6 |
cooling down protection active |
“SysSupplyTemp” < “UpperTemp” + SST-01 |
7 |
DHWS priority request active |
DHW temperature control active and “SysSupplyTemp” < “UpperTemp” + SST-01 and “UpperTemp” < “CalcDHWTempSp” - SYS-04 |
8 |
heat override function |
Input “OverheatProt” = 1 and SYS-02 <>0 |
9 |
system supply temperature setpoint failed |
“SysSupplyTemp” < “CalcDHWTempSp” in the time SST-02 since control start |
10 |
legionella protection function active |
This function is activated if all the conditions are true: - DHW is in un-occupied mode - there is no extended operation - input "LegionellaEnable" switches to "1". |
11 |
legionella protection function failed |
One of the DHW sensors (upper or lower) < LEG-01– UWT-01 after LEG-03 since legionella start |
12 |
maximum temperature limitation by max. thermostat |
alarm at the input “MaxThermostat” |