Inputs and Outputs


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”