The electronic caretaker automatically switches the heating circuit:
In order to avoid frequent switching, the filtered outside air temperature is filtered once again inside the heating circuit. The period for the cascaded filtering of the outside air temperature is defined by the parameter OAT-04. The red curve in the next picture is the filtered and the black curve is the double filtered outside air temperature.
The heating circuit will be switched off when any of the following conditions are true:
Usually the first switch off condition happens earlier.
The heating circuit will be switched on again when both of the following conditions are true:
Usually the second switch on condition happens later.
The calculated long period filtered outside air temperature is displayed in the output "LongFiltOATemp" and the parameter DISP-03.
Fig. 10. Heating limits
Table 16. Parameter List
Description |
Value Range |
Default Value |
Unit |
|
OAT-01: high limit smooth filtered long period |
0...150 |
16 |
°C |
|
OAT-02: high limit smooth filtered short period |
0...150 |
18 |
°C |
|
OAT-04: long time smooth filtering |
0...168 |
48 |
h |
|
DISP-03: long term smooth filtered outside air temperature |
-50…150 |
- |
°C |