In case of a secondary pump failure, the heat exchanger could easily overheat and trigger a maximum temperature or safety temperature thermostat alarm.
To avoid this, do the following connection:
If this alarm is active the heat exchanger will reduce its heat demand to the minimum value of the defined in the parameter
DST-03 and the actual heat demand at the input “HeatDemand” limited by SST-02.
See the connection examples in the next figure.
Fig. 10. Connect the pump status or alarm to the heat exchanger macro
Table 15. Parameter List
Description |
Value Range |
Default Value |
Unit |
DST-03: minimum district supply temperature at pump alarm |
0...200 |
0 |
°C |