System Supply Temperature Failed Alarm

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

-