For this function it is necessary to connect a system supply temperature sensor "SysSupplyTemp" in the primary heating system. When the system supply temperature sensor does not reach the target setpoint "CalcDHWTempSp" (= "DHW_TempSp" for normal operation) within the appropriate time period defined by parameter SST-02, an alarm will be generated via the output "DHWS_SST_Alm".
The alarm can be reset manually or automatically as defined by parameter SYS-06.
In case of manual reset and a system supply temperature failed alarm, the temperature control of the DHWS will be stopped until the alarm is reset by the input "Reset".
In case of automatic reset and a system supply temperature failed alarm, the temperature control of the DHWS continues until the system supply temperature has reached the target setpoint "CalcDHWTempSp".
NOTE: |
To disable this alarm function, set parameter SST-02 to "0". |
Table 15. Parameter List
Description |
Range |
Default |
Units |
SST-02: time to reach SST setpoint; 0 = disable |
0…3600 |
1800 |
sec |
SYS-06: automatic/ manual reset |
0/ 1 |
1 |
- |