|
|
| Functions of the heating circuit |
|
|
|
|
Function | WE | Configuration | |
Differential temperature control using variable | OFF | Co1, 2, 3 | |
weighting factors | 0.5 | Proportional gain factor KP /0.1 to 999 | |
| 200 s | Reset time TN / 1 to 999 s | |
| 20 °C | Intended temp. difference / 0 to 40 °C | |
| 90 % | Analog value max. / 0 to 100 % | |
| 30 % | Analog value min. / 0 to 100 % | |
Parameters | WE | Parameter level / Range of values | |
Max. return flow temperature* | 65 °C | PA1, 2, 3 | / 20 to 90 °C |
Min. return flow temperature* | 20 °C | PA1, 2, 3 | / 20 to 90 °C |
* Can only be selected when Co5
Note!
Only one function can be assigned to an analog output (e.g. flow temperature control, passing on the outdoor temperature or differential temperature control).
5.5Deactivation depending on outdoor temperature
5.5.1 OT deactivation value in rated operation
If the outdoor temperature exceeds the limit OT deactivation value in rated operation, the affected heating circuit is put out of service immediately. The valve is closed and the pump is switched off after t = 2 x Valve transit time. When the outdoor temperature falls below this value (less 0.5 °C hysteresis), heating operation is restarted immediately.
With the default settings, this means that, during the warm season, the system is switched off at an outdoor temperature of 22 °C.
Parameter | WE | Parameter level / Range of values |
OT deactivation value | 22 °C | PA1, 2, 3 / 0 to 90 °C |
in rated operation |
|
|
5.5.2 OT deactivation value in reduced operation
If the outdoor temperature in reduced operation exceeds the limit OT deactivation value in re- duced operation, the affected heating circuit is put out of service immediately. The valve is closed and the pump is switched off after t = 2 x Valve transit time.
EB 5179 EN 43