On initial start-up or after power failure the boiler control will be enabled and started if heating demand is required. Depending on the boiler type selection the sensors “SupplyTemp” and “RetTemp” are required or optional, also the start and stop procedures are different, as shown in the next table.
Table 4. Boiler Start procedures large water volume SYS-03 = 1
SYS-02 |
1 |
2 |
3 |
SupplyTemp |
option |
option |
option |
RetTemp |
required |
required |
option |
Start procedure |
A |
B |
B |
Stop procedure |
E |
F |
F |
Table 5. Boiler Start procedures small water volume SYS-03 = 2
SYS-02 |
1 |
2 |
3 |
SupplyTemp |
option |
option |
option |
RetTemp |
required |
required |
option |
Start procedure |
C |
D |
D |
Stop procedure |
E |
F |
F |
The start and stop procedures of the different configurations are as follows:
Start procedure A:
Start procedure B:
Start procedure C:
Start procedure D:
Stop procedure E:
Stop procedure F:
Table 6. Parameter List
Description |
Value Range |
Default Value |
Unit |
SYS-02: configuration boiler type 1 = minimum return temperature control 2 = maximum return temperature control 3 = no return temperature control |
1...3 |
3 |
- |
SYS-03: heat generator water volume 1 = large 2 = small |
1 / 2 |
1 |
- |
BST-03: maximum boiler supply temp. modulating stage |
50...500 |
85 |
°C |
BPU-01: pump off delay |
0...3600 |
300 |
sec |
BPU-02: temperature difference pump stop |
0...50 |
5 |
K |