Fig. 13. Macro Icon with Inputs and Outputs
Table 16. Inputs
Inputs |
Description |
Connection Signal Name |
SecSupTemp |
secondary supply temperature temp. |
|
HeatDemand |
heat demand input |
XXX |
PriSupTemp |
primary supply temperature |
|
PriSupTempSp |
primary supply temperature setpoint set to 58 °C to avoid calcification |
|
PriRetTemp |
primary return temperature |
|
PriRetTempSp |
primary return temperature setpoint |
|
DistrHtgSupTemp |
district heating supply temperature |
|
FilteredOATemp |
filtered outside air temperature |
XXX |
LegionellaActive |
legionella function is active |
|
MaxThermostat |
maximum temperature |
|
SafetyTherm |
safety thermostat |
|
SecPmpStatAlm |
pump status or common alarm input |
|
SecMinPressSw |
secondary minimum pressure switch |
|
Reset |
reset |
XXX |
Table 17. Outputs
Outputs |
Description |
Connection Signal Name |
PriPumpCmd |
primary pump command |
|
ValveControl |
DHW valve control output |
|
SecPumpCmd |
secondary pump command |
|
CalcSSTempSp |
calculated secondary supply setpoint |
|
CalcRWTempSp |
calculated return temperature setpoint |
|
RefillValveCmd |
refill valve command |
|
HE-Failure |
heat exchanger temperature failed alarm |
|
OperationMode |
contains diagnostic information |
Table 18. Operation modes
DISP-02 OperationMode |
Operation mode |
Comment |
1 |
heat exchanger has no demand |
there is no external heat demand |
2 |
secondary supply temperature control active |
normal operation |
3 |
primary supply temp limitation active |
primary supply temperature limitation control has the minimum signal |
4 |
primary return temp limitation active |
primary return temperature limitation control has the minimum signal |
5 |
periodic valve opening during limitation control |
Open the valve to avoid measuring standing water during limitation control, if the valve control signal = 0%. |
6 |
minimum pressure switch alarm |
alarm at the input “SecMinPressSw” |
7 |
outside air temp frost protection |
If the secondary supply temperature becomes less than the value of parameter SST-02 (switching differential 2 K) and the outside air temperature is less than the frost protection limit OAT-01 (switching differential 1 K), then the SST control will be released. In this case, the setpoint will be the value of the parameter SST-02. |
8 |
pump alarm |
secondary pump alarm at the input ”SecPmpStatAlm” |
9 |
system supply temperature setpoint failed |
“SecSupTemp” < “CalcSSTempSp” –SST-06 for more than 600 sec after control start. |
10 |
legionella protection function active |
input “LegionellaActive” is active and increases the return temperature setpoint |
11 |
||
12 |
maximum temperature limitation by max. thermostat |
alarm at the input “MaxThermostat” |
13 |
maximum temperature limitation by safety thermostat |
alarm at the input “SafetyTherm” |
14 |
maximum refill time exceeded |
refill failed after a minimum pressure alarm (6) |