Inputs and Outputs


Fig. 2.   CARE Icon


Table 12.   Inputs

Inputs

Functional description

Connection Signal Name

HeatDemandIn

heat demand input


BufSupplyTemp

buffer supply temperature


BufUpperTemp

buffer upper temperature


BufMid1Temp

buffer middle temperature 1


BufMid2Temp

buffer middle temperature 2


BufMid3Temp

buffer middle temperature 3


BufLowerTemp

buffer lower temp


FilteredOATemp

outside air temperature



Table 13.   Outputs

Outputs

Functional description

Connection Signal Name

HeatDemandOut

heat demand output to the heating strategy


ChgOverValve

changeover valve; 0 = buffer; 1 = boiler


ChargPumpEn

charging pump enable


ChgValve1

charging valve 1; 0 = close; 1 = charge


ChgValve2

charging valve 2; 0 = close; 1 = charge


ChgValve3

charging valve 3; 0 = close; 1 = charge


ChgValve4

charging valve 4; 0 = close; 1 = charge


BufOverheatAlm

buffer overheat alarm; 0 = normal; 1 = alarm


StopHighOATemp

stop buffer loading at high outside air temperatures


OperationMode

contains diagnostic information


MaxChgLevels

Display value showing the maximum number of possible buffer levels. Value range [1…4]

1 = one level

2 = two levels

3 = three levels

4 = four levels


ActLoadLevel

Actual buffer load level [1…5]

1 = no charging

2 = charging valve 1

3 = charging valve 2

4 = charging valve 3

5 = charging valve 4



Table 14.   Operation Mode

OperationMode

Function

Comments

1

buffer feed the system

Discharging control and “ChgOverValve1” = buffer

2

heat generator feeds the system

Discharging control and “ChgOverValve1” = boiler







5

stop buffer loading at high outdoor temperatures

Charging control and (“BufUpperTemp” < OVHT-01 or “BufLowerTemp” > OVHT-02)

6

buffer overheat protection

“FilteredOATemp” > OAT-01