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 |