Fig. 3. CARE Icon
Table 10. Inputs
Inputs |
Functional description |
Connection Signal Name |
HeatDemandIn |
heat demand input |
|
BufUpperTemp |
buffer upper temperature |
|
BufMid1Temp |
buffer middle temperature 1 |
|
BufMid2Temp |
buffer middle temperature 2 |
|
BufMid3Temp |
buffer middle temperature 3 |
|
BufLowerTemp |
buffer lower temp |
|
Load buffer to sensor: 0 = BufUpperTemp;1 = BufMid1Temp; 2 = BufMid2Temp; 3 = BufMid3Temp; 4 = BufLowerTemp |
||
ExtLoading |
0 = no external loading; 1 = external loading |
|
FilteredOATemp |
outside air temperature |
Table 11. Outputs
Outputs |
Functional description |
Connection Signal Name |
HeatDemandOut |
heat demand output to the heating strategy |
|
Buf_SpShift |
buffer setpoint shift |
|
EffLowerTemp |
The value of the effective lower temperature; depends on the input “BufLoadLevel” and will be one of the middle or lower sensor. |
|
ChargPumpEn |
charging pump enable |
|
ChgOverValve |
changeover valve; 0 = buffer; 1 = boiler |
|
BypassValve1 |
bypass valve 1; 0 = bypass; 1 = charge |
|
BypassValve2 |
bypass valve 2; 0 = bypass; 1 = charge |
|
BypassValve3 |
bypass valve 3; 0 = bypass; 1 = charge |
|
BypassValve4 |
bypass valve 4; 0 = bypass; 1 = charge |
|
BufOverheatAlm |
buffer overheat alarm; 0 = normal; 1 = alarm |
|
StopHighOATemp |
stop buffer loading at high outside air temperatures |
|
OperationMode |
contains diagnostic information |
Table 12. 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 |
3 |
buffer charging |
Charging control and buffer charging; transmit heat demand to heat generator |
4 |
buffer discharging |
Charging control and buffer discharging |
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 |