The control temperature depends on the configuration parameter CFG-01.
For this measurement the system supply, the system return or the maximum of the system supply and the system return temperature is used internally.
For all configurations the system supply temperature is mandatory.
The control parameters SST-03 to SST-12 are used for all configurations defined in CFG-01.
In case an open header is used in the heat generation plant and when there is a minimum secondary demand, the return temperature sensor “SysRetTemp” can be higher than the supply temperature “SysSupplyTemp”, which is located in the secondary system. See the possible flows in next figure.
Fig. 3. System supply temperature measurement
Table 2. Parameter List
Description |
Value Range |
Default Value |
Unit |
CFG-01: control mode configuration: 0; 1 = system supply temperature control 2 = system return temperature control 3 = maximum of system supply and return temperature control |
0;1...3 |
3 |
- |