When a boiler is in operation and a supply temperature sensor is connected, the boiler minimum supply temperature, defined by parameter BST-04, is transmitted to the heating control strategy macro, to maintain the required boiler temperature limits within the whole heating system.
When a boiler is in operation a return temperature sensor is connected, the boiler specific minimum return temperature, defined by input “RetTempSp” is transmitted to the heating control strategy macro, to maintain the return temperature only if minimum return temperature control was configured (SYS-02 = 1).
The adjusted minimum boiler supply and return temperatures value BST-04 and “RetTempSp” will always be respected for active heat generators. These values will be sent to the strategy module, in order to adjust the common system supply temperature setpoint.
Table 17. Parameter List
Description |
Value Range |
Default Value |
Unit |
BST-04: minimum boiler supply temperature |
0...500 |
10 |
°C |
The minimum supply and return temperatures of all the active heat generators will be transmitted between heat generators and strategy via the internal registers.