For this function a boiler supply temperature sensor (“SupplyTemp”), located in the boiler itself, must be connected. The modulating stage has a high limit override control, according to the setpoint and the P-band, defined by parameter BST-03 and BST-05. The maximum control signal for modulating control varies from 0...100% as shown in the next figure.
Fig. 7. Maximum temperature control on modulating stage
Table 13. Parameter List
Description |
Value Range |
Default Value |
Unit |
BST-03: maximum boiler supply temp. modulating stage |
30...500 |
85 |
°C |
BST-05: P-band maximum supply temperature control |
0…50 |
10 |
K |